CN214064405U

CN214064405U - A projection display device for research on comprehensive practice activities of primary school mathematics

Info

Publication number: CN214064405U
Application number: CN202023127035.1U
Authority: CN
Inventors: 黎波; 罗述红; 罗虎成; 陈囿蓉
Original assignee: Chengdu Normal University
Current assignee: Chengdu Normal University
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-08-27
Anticipated expiration: 2030-12-22

Abstract

The utility model relates to the technical field of projection display equipment, in particular to a projection display device for the research of elementary school mathematics comprehensive practice activities. , a suction cup is fixedly connected to the lower side of the fixed block, a fixed pipe is fixedly connected to the middle position of the upper side of the suction cup, a support base is fixedly connected to the outside of the fixed pipe, and a moving block is slidably connected to the inside of the fixed pipe. The upper side of the moving block is fixedly connected with a threaded rod, and the upper end of the threaded rod is screwed with a knob; in the utility model, through the provided suction cup, knob and fixing tube, this setting enables the bottom of the projection display device to be provided with a fixing device, avoiding the need for When the projection display device is used in teaching, the projection display device falls and causes damage to the projection display device. The fixing method is simple, the fixing operation is fast and stable, and it has a good prospect of use.

Description

Projection display equipment for primary school mathematics comprehensive practice activity research

Technical Field

The utility model relates to a projection display equipment technical field specifically is a projection display equipment is used in study of primary school's mathematics comprehensive practice activity.

Background

With the continuous development of science and technology and the continuous update of multimedia technology, the current social teaching mode gradually tends to multimedia teaching, and a projector, also called a projector, is a device capable of projecting images or videos onto a curtain, amplifies the outlines of workpieces by using optical elements, projects the outlines onto a video screen, can be connected with different devices through different interfaces, and is widely applied to families, offices, schools and entertainment places at present.

Most of projection display equipment now can not carry out angle modulation to projection display equipment when using, has reduced projection display equipment and has used the flexibility, and projection display equipment bottom is not equipped with fixing device, makes projection display equipment drop easily when teaching uses, leads to projection display equipment's damage, consequently proposes to above-mentioned problem, a projection display equipment for primary school's mathematics comprehensive practice activity research.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a primary school's mathematics is synthesized practice projection display device for activity research to solve the problem that provides among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a projection display device for the comprehensive practice and activity research of primary mathematics comprises a supporting base, a supporting plate and a projector, wherein the lower side of the supporting base is fixedly connected with fixing blocks which are uniformly distributed, the lower side of the fixing blocks is fixedly connected with suckers, the middle position of the upper side of each sucker is fixedly connected with a fixing tube, the outer side of each fixing tube is fixedly connected with the supporting base, the inner side of each fixing tube is slidably connected with a moving block, the upper side of each moving block is fixedly connected with a threaded rod, the upper end of the threaded rod is spirally connected with a knob, the lower side of the knob is rotatably connected with a connecting block, the lower side of the connecting block is fixedly connected with the supporting base, the left side and the right side of the upper end of the supporting base are fixedly connected with the supporting plate, the utility model discloses a gear, including first connecting axle, first gear, second gear, first connecting axle outside, first connecting axle right side is rotated and is connected with the backup pad, first connecting axle outside intermediate position department fixedly connected with first gear, the meshing of first gear upside is connected with the second gear, the inboard fixedly connected with second connecting axle of second gear, both ends are rotated and are connected with the backup pad about the second connecting axle, the meshing of second gear upside is connected with the gear board, gear board upper end outside sliding connection has the slide rail frame, gear board upside fixedly connected with control block, the inboard sliding connection of control block has the backup pad.

Preferably, the upper end of the sucker at the lower side of the fixing tube is provided with a circular hole, and the diameter of the lower side surface of the moving block is the same as that of the upper side surface of the circular hole.

Preferably, the sucking disc belongs to the rubber material plate and constitutes, the movable block belongs to the rubber material plate and constitutes.

Preferably, the bearing is fixedly connected to the middle position of the inner side of the supporting plate on the right side, and the rotating shaft on the right side is rotatably connected with the supporting plate through the bearing.

Preferably, the outer side of the upper end of the gear plate is fixedly connected with a sliding connection plate, and the gear plate is connected with the sliding rail frame in a sliding mode through the sliding connection plate.

Compared with the prior art, the beneficial effects of the utility model are that:

1. in the utility model, by means of the arranged sucking disc, the knob and the fixed tube, the knob is rotated to drive the threaded rod to rotate, the threaded rod is rotated to drive the movable block to move, the movable block can extract air in the inner side of the sucking disc so as to fix the sucking disc on the desktop, the bottom of the projection display equipment is provided with the fixing device by the arrangement, the damage of the projection display equipment caused by the falling of the projection display equipment when the projection display equipment is used in teaching is avoided, the fixing mode is simple, the fixing operation is rapid and stable, and the fixing device has a better use prospect;

2. the utility model discloses in, through the control block that sets up, the toothed plate, first gear and second gear, through the mobility control piece, the control block removes and drives the toothed plate and removes, the toothed plate removes and drives second gear revolve, second gear revolve drives first gear revolve, first gear revolve drives the axis of rotation and rotates, thereby the axis of rotation rotates projecting apparatus projection angle modulation, this kind of setting makes projection display equipment can carry out angle modulation, to the regulation of projection display equipment projection height when being convenient for teach the use, projection display equipment use flexibility has been increased.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A of FIG. 1 according to the present invention;

FIG. 3 is an enlarged schematic view of the structure of FIG. 1 at B according to the present invention;

fig. 4 is a schematic diagram of the structure of the gear plate of the present invention.

In the figure: the device comprises a support base 1, a fixing block 2, a sucker 3, a fixing tube 4, a moving block 5, a threaded rod 6, a knob 7, a connecting block 8, a supporting plate 9, a rotating shaft 10, a projector 11, a bearing 12, a first connecting shaft 13, a first gear 14, a second connecting shaft 15, a second gear 16, a gear plate 17, a sliding connecting plate 18, a sliding rail frame 19 and a control block 20.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution:

a projection display device for the comprehensive practice activity research of primary mathematics comprises a supporting base 1, a supporting plate 9 and a projector 11, wherein the lower side of the supporting base 1 is fixedly connected with fixed blocks 2 which are uniformly distributed, the lower side of the fixed blocks 2 is fixedly connected with suckers 3, the middle position of the upper side of the suckers 3 is fixedly connected with a fixed tube 4, the outer side of the fixed tube 4 is fixedly connected with the supporting base 1, the inner side of the fixed tube 4 is slidably connected with a moving block 5, the upper side of the moving block 5 is fixedly connected with a threaded rod 6, the upper end of the threaded rod 6 is spirally connected with a knob 7, the lower side of the knob 7 is rotatably connected with a connecting block 8, the lower side of the connecting block 8 is fixedly connected with the supporting base 1, the left side and the right side of the upper end of the supporting base 1 are fixedly connected with the supporting plate 9, the inner side of the supporting plate 9 is fixedly connected with a rotating shaft 10, the inner side of the rotating shaft 10 is fixedly connected with the projector 11, the first connecting shaft 13 is fixedly connected to the right side of the rotating shaft 10, the right side of the first connecting shaft 13 is rotatably connected with a supporting plate 9, a first gear 14 is fixedly connected to the middle position of the outer side of the first connecting shaft 13, a second gear 16 is meshed and connected to the upper side of the first gear 14, a second connecting shaft 15 is fixedly connected to the inner side of the second gear 16, the supporting plate 9 is rotatably connected to the left end and the right end of the second connecting shaft 15, a gear plate 17 is meshed and connected to the upper side of the second gear 16, a sliding rail frame 19 is slidably connected to the outer side of the upper end of the gear plate 17, a control block 20 is fixedly connected to the upper side of the gear plate 17, and the supporting plate 9 is slidably connected to the inner side of the control block 20.

The upper end of the sucker 3 at the lower side position of the fixed tube 4 is provided with a circular hole, the diameter of the lower side surface of the movable block 5 is the same as that of the upper side surface of the circular hole, the arrangement is favorable for extracting air at the inner side of the sucker 3 when the knob 7 is rotated, the fixation of the sucker 3 is favorable, the sucker 3 belongs to a rubber plate, the movable block 5 belongs to a rubber plate, the arrangement ensures that the movable block 5 and the sucker 3 have the characteristic of elastic deformation, the projector 11 is convenient to fix, the bearing 12 is fixedly connected at the middle position of the inner side of the right side supporting plate 9, the right side rotating shaft 10 is rotatably connected with the supporting plate 9 through the bearing 12, the arrangement is favorable for the angle adjustment of the projector 11, the outer side of the upper end of the gear plate 17 is fixedly connected with the sliding connection plate 18, the gear plate 17 is slidably connected with the sliding rail frame 19 through the sliding connection plate 18, and the arrangement is convenient for moving the gear plate 17 through the control block 20, thereby controlling the rotation of the first gear 14 and the second gear 16.

The working process is as follows: when the projector 11 is used, firstly, the projector 11 needs to be fixed on a desktop, the knob 7 is connected to the upper end of the threaded rod 6 in a threaded manner by rotating the knob 7, the threaded rod 6 is driven to rotate by rotating the knob 7, the threaded rod 6 is fixedly connected to the upper side of the movable block 5, the movable block 5 is driven to move by rotating the threaded rod 6, the upper end of the sucker 3 at the lower side position of the fixed tube 4 is provided with a circular hole, the diameter of the lower side surface of the movable block 5 is the same as that of the upper side surface of the circular hole, air inside the sucker 3 can be extracted by moving the movable block 5, so that the sucker 3 is fixed on the desktop, after the projector 11 is fixed, the projection angle of the projector 11 needs to be adjusted, the upper side of the gear plate 17 is fixedly connected with the control block 20 by moving the control block 20, the control block 20 drives the gear plate 17 to move, the gear plate 17 is meshed with the gear plate 17 at the upper side of the second gear 16, and the gear plate 17 drives the second gear 16 to rotate, first gear 14 upside meshing is connected with second gear 16, second gear 16 rotates and drives first gear 14 and rotates, be located the first connecting axle 13 of 10 right sides fixedly connected with of right side axis of rotation, the first gear 14 of first connecting axle 13 outside intermediate position department fixedly connected with, first gear 14 rotates and drives axis of rotation 10 and rotate, thereby axis of rotation 10 rotates 11 projection angle modulation to projecting apparatus, this kind of setting makes projection display equipment bottom be equipped with fixing device, projection display equipment has been avoided when teaching and has been used, projection display equipment falls and leads to projection display equipment's damage, the fixed mode is simple, fixed operation is swift, and is stable, better use prospect has, make projection display equipment can carry out angle modulation, be convenient for teaching is to the regulation of projection display equipment projection height when using, projection display equipment use flexibility has been increased.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A projection display device for the research of elementary school mathematics comprehensive practice activity, comprising a support base (1), a support plate (9) and a projector (11), it is characterized in that: the lower side of the support base (1) is fixedly connected with A fixed block (2) is evenly distributed, a suction cup (3) is fixedly connected to the lower side of the fixed block (2), and a fixed pipe (4) is fixedly connected at the middle position of the upper side of the suction cup (3), and the fixed A support base (1) is fixedly connected to the outside of the pipe (4), a moving block (5) is slidably connected to the inside of the fixed pipe (4), and a threaded rod (6) is fixedly connected to the upper side of the moving block (5). The upper end of the threaded rod (6) is screwed with a knob (7), the lower side of the knob (7) is rotatably connected with a connecting block (8), and the lower side of the connecting block (8) is fixedly connected with a support base (1), A support plate (9) is fixedly connected to the left and right sides of the upper end of the support base (1), a rotation shaft (10) is fixedly connected to the inner side of the support plate (9), and a projector is fixedly connected to the inner side of the rotation shaft (10). (11), a first connecting shaft (13) is fixedly connected to the right side of the rotating shaft (10) on the right side, a support plate (9) is rotatably connected to the right side of the first connecting shaft (13), and the first connecting shaft (13) is rotatably connected to the right side. A first gear (14) is fixedly connected at an outer middle position of a connecting shaft (13), a second gear (16) is meshed and connected on the upper side of the first gear (14), and the inner side of the second gear (16) is fixed A second connecting shaft (15) is connected, the left and right ends of the second connecting shaft (15) are rotatably connected with support plates (9), and the upper side of the second gear (16) is meshed and connected with a gear plate (17), A slide rail frame (19) is slidably connected to the outer side of the upper end of the gear plate (17), a control block (20) is fixedly connected to the upper side of the gear plate (17), and a support plate is slidably connected to the inner side of the control block (20). (9).

2. A kind of projection display device for research on comprehensive practice activity of mathematics in elementary school according to claim 1, characterized in that: a circular hole is provided on the upper end of the suction cup (3) at the lower position of the fixed pipe (4), so that the The diameter of the lower side surface of the moving block (5) is the same as the diameter of the upper side surface of the circular hole.

3. A kind of projection display device for research on comprehensive practice activity of elementary school mathematics according to claim 1, characterized in that: the suction cup (3) belongs to the composition of rubber material plate, and the moving block (5) belongs to the composition of rubber material plate .

4. A kind of projection display device for research on comprehensive practice activity of mathematics in elementary school according to claim 1, characterized in that: a bearing (12) is fixedly connected at the inner middle position of the support plate (9) on the right side, and is located on the right side. The rotating shaft (10) on the side is rotatably connected with the support plate (9) through a bearing (12).

5. A kind of projection display device for research on comprehensive practice activity of elementary school mathematics according to claim 1, characterized in that: a sliding connecting plate (18) is fixedly connected to the outer side of the upper end of the gear plate (17), and the gear plate (17) 17) The sliding connecting plate (18) is slidably connected with the sliding rail frame (19).