CN112233465B

CN112233465B - Projection equipment for information technology teaching

Info

Publication number: CN112233465B
Application number: CN202011180770.0A
Authority: CN
Inventors: 张雅洁; 张苏豫; 周炳忠
Original assignee: Wenzhou Polytechnic
Current assignee: Wenzhou Polytechnic
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2022-04-12
Anticipated expiration: 2040-10-29
Also published as: CN112233465A

Abstract

The invention discloses a projection device for information technology teaching, which comprises two groups of guide rails, wherein two groups of single plates are connected in the guide rails in a sliding way, the guide rail is also rotatably connected with a synchronous gear, the upper end and the lower end of the single plate are both connected with a synchronous rack meshed and connected with the synchronous gear, a projection curtain is arranged between two groups of synchronous gears, an adjusting mechanism capable of unfolding or folding the projection curtain when the single plate moves is arranged between the two groups of single plates and the guide rail, the projection device is used for information technology teaching, the projection curtain is arranged between the two single plates of the blackboard and is adjusted by the adjusting mechanism, so that the projection curtain can be unfolded and folded by pushing the single plates to move, the projection curtain can be folded and unfolded more quickly, thereby be convenient for pack up the regulation fast when projection curtain shielding plate book, and adjust simple and conveniently.

Description

Projection equipment for information technology teaching

Technical Field

The invention relates to the technical field of projection equipment, in particular to projection equipment for information technology teaching.

Background

In computer information technology classroom is given lessons, often need use the projector with education information projection curtain on, the teaching of being convenient for, electronic information technology teaching especially to many people in, often need to use projection arrangement for a long time, like the projector etc. for the local structure of dynamic explanation electronic components, software flow etc. at the in-process of teaching, all can need to use the projector usually.

Present projecting apparatus is for carrying out the projection teaching in the classroom that the space is big better, can select directly to install it under the roof in the classroom when the installation, and sets up a curtain in blackboard department and carry out the projection, consequently can occupy half space of blackboard, just need pack up the projection cloth or wipe original blackboard-writing under the more condition of blackboard-writing, consequently the use has certain limitation. To this end, a projection device for information technology teaching is proposed.

Disclosure of Invention

The present invention is directed to a projection apparatus for information technology teaching that is contracted and expanded by movement of a blackboard, so as to solve the problems set forth in the background art described above.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a projection equipment for information technology teaching, includes two sets of guide rails, sliding connection has two sets of veneers in the guide rail, it is connected with synchronous gear still to rotate on the guide rail, the last lower extreme of veneer all is connected with the synchronous rack of being connected with synchronous gear engagement, and is two sets of be provided with the projection curtain between the synchronous gear, it is two sets of be provided with the adjustment mechanism that can expand or pack up the projection curtain when the veneer removes between veneer and the guide rail.

Preferably, the adjusting mechanism comprises two sets of rotating shafts for installing the synchronous gears, one end of each rotating shaft is rotatably connected with a supporting block in sliding connection with the single plate, the rotating shafts are connected with a retracting rod for rolling up the projection curtain, a driving device for unfolding the projection curtain is arranged in each supporting block, one set of the rotating shafts is provided with a control mechanism for controlling the driving device, the other set of the rotating shafts is provided with a limiting mechanism for limiting the projection curtain, and the control mechanism is used for controlling the driving device to unfold and fold the projection curtain conveniently so as to facilitate switching.

Preferably, the driving device comprises an ejection block arranged on the single plate, the supporting block is provided with an avoidance groove in sliding connection with the ejection block, the supporting block is in sliding connection with the ejection block and a pushing block in sliding connection with the ejection block, a first spring is connected between the ejection block and the ejection block, one end of the projection curtain is connected with a pulling strip in sliding connection with the supporting block and connected with the limiting mechanism, and the first spring is convenient for pressing even if the two single plates are not at initial positions.

Preferably, the limiting mechanism comprises a limiting groove which is formed in the single plate and matched with the pulling strip, a plurality of groups of through holes are formed in the pulling strip, a pressing strip is connected to the single plate in a sliding mode, a plurality of groups of limiting rods extending into the through holes are connected to one side of the pressing strip, a second spring is connected between the pressing strip and the single plate, pushing blocks for pushing the pressing strip are connected to two ends of the pressing strip, a pushing groove matched with the pushing blocks is formed in the supporting block, and the second spring is convenient to automatically clamp so as to achieve automatic limiting.

Preferably, the control mechanism comprises two groups of wedge blocks which are slidably connected in the single plate and slidably connected with the ejection block, an adjusting rod with two ends in threaded connection with the two groups of wedge blocks is connected between the two groups of wedge blocks, an outer gear is arranged on the adjusting rod, an adjusting rack with two ends slidably connected with the single plate is connected to the outer gear in a meshed manner, the outer side of the adjusting rack is further connected with an adjusting block, and the outer gear can enable the wedge blocks to move under the rotation of the adjusting rack, so that the ejection block is pushed, and the adjustment is convenient.

Preferably, the adjusting rod is rotatably connected with two groups of rotating rings, the adjusting rod is fixedly connected with a driving gear, the rotating rings are rotatably connected with a plurality of groups of transmission gears which are respectively in meshed connection with the driving gear and the outer gear, and the part of the mechanism forms a speed reducing mechanism so that the adjusting block can move a larger distance when pushing a smaller distance, thereby completing the adjustment.

Preferably, a magnetic strip is connected to one side of the pull strip, so that the pull strip is stable.

Preferably, the end part of the limiting rod is provided with a guide round angle, so that the limiting rod is conveniently guided into the round hole.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the projection curtain is arranged between the two single plates of the blackboard and is adjusted by the adjusting mechanism, so that the projection curtain can be unfolded and folded by pushing the single plates to move, and can be more quickly folded and unfolded, therefore, the projection curtain can be conveniently and quickly folded and adjusted when the projection curtain shields a blackboard book, and the adjustment is simple and convenient.

Drawings

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

FIG. 2 is an expanded view of a portion of the present invention;

FIG. 3 is an enlarged view of the structure of area A in FIG. 2;

FIG. 4 is an enlarged view of the structure of the area B in FIG. 2;

FIG. 5 is a partially developed schematic view of the adjustment mechanism;

FIG. 6 is a schematic view of a part of the structure of the position-limiting mechanism;

FIG. 7 is a partial schematic view of the control mechanism;

FIG. 8 is an enlarged view of the structure of the area C in FIG. 7;

fig. 9 is an enlarged view of the structure of region D in fig. 8.

In the figure: 1-a guide rail; 2-single board; 3-a synchronizing gear; 4-a synchronous rack; 5-projection screen; 6-an adjusting mechanism; 7-a rotating shaft; 8-a support block; 9-retracting the rod; 10-a drive device; 11-a control mechanism; 12-a limiting mechanism; 13-an ejection block; 14-avoidance slots; 15-pop-up block; 16-a pushing block; 17-a first spring; 18-a pull strip; 19-a limit groove; 20-a through hole; 21-pressing the strip; 22-a limiting rod; 23-a second spring; 24-a push block; 25-pushing the groove; 26-wedge block; 27-adjusting rod; 28-an external gear; 29-adjusting the rack; 30-an adjusting block; 31-a rotating ring; 32-a drive gear; 33-a transmission gear; 34-magnetic strip.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-9, the present invention provides a technical solution: a projection device for information technology teaching comprises two groups of guide rails 1, wherein two groups of single plates 2 are slidably connected in the guide rails 1, synchronous gears 3 are rotatably connected on the guide rails 1, synchronous racks 4 meshed with the synchronous gears 3 are connected to the upper ends and the lower ends of the single plates 2, the guide rails 1, the single plates 2, the synchronous gears 3 and the synchronous racks 4 form a structure the same as that of a movable blackboard in the prior art, a projection curtain 5 is arranged between the two groups of synchronous gears 3, an adjusting mechanism 6 capable of unfolding or folding the projection curtain 5 when the single plates 2 move is arranged between the two groups of single plates 2 and the guide rails 1, the projection curtain 5 is conveniently unfolded when needed and folded when not needed and is adjusted and controlled by the adjusting mechanism 6, and not only can the projection but also can switch a part of the shielded blackboards out for normal use, and further set up a travel switch between two veneers 2 for whether detect projection curtain 5 and expand, make the projecting apparatus bright screen after expanding, and put the projecting apparatus into the screen when packing up, be convenient for use more, and need not like present projection curtain, pack up and expand and all need longer time, switch inconveniently.

Adjustment mechanism 6 includes two sets of pivots 7 that are used for installing synchronous gear 3, the one end of pivot 7 is rotated and is connected with supporting shoe 8 with 2 sliding connection of veneer, and is two sets of be connected with the pole 9 of packing up that is used for rolling up projection curtain 5 between the pivot 7, the one end of projection curtain 5 with pack up the pole 9 and be connected, pivot 7 can be opened or pack up projection curtain 5 when rotating under synchronous gear 3 effect, be provided with the drive arrangement 10 that expandes projection curtain 5 in the supporting shoe 8, one of them is a set of be provided with control drive arrangement 10's control mechanism 11 in the veneer 2, another group be provided with the stop gear 12 of restriction projection curtain 5 on the veneer 2.

The driving device 10 comprises an ejection block 13 arranged on the single plate 2, an avoidance groove 14 connected with the ejection block 13 in a sliding manner is formed in the supporting block 8, the avoidance groove 14 prevents the supporting block 8 from pressing the ejection block 13, an ejection block 15 and a pushing block 16 connected with the ejection block 13 in a sliding manner are connected in the supporting block 8, a first spring 17 is connected between the ejection block 15 and the ejection block 13, the pushing block 16 is pushed by the ejection block 13 to push the ejection block 15, the first spring 17 can play a role in force transmission and also play a role in buffering, even if the ejection block 15 is not pushed, the pushing block 16 can be pushed, one end of the projection screen 5 is connected with a pulling strip 18 connected with the supporting block 8 in a sliding manner and connected with the limiting mechanism 12, and the ejection block 15 pushes out the pulling strip 18 when pushing, so as to drive the projection screen 5 to be unfolded.

The limiting mechanism 12 comprises a limiting groove 19 which is arranged on the single plate 2 and is matched with the pulling strip 18, a plurality of groups of through holes 20 are arranged on the pulling strip 18, a pressing strip 21 is connected in the single plate 2 in a sliding manner, a plurality of groups of limiting rods 22 extending into the through holes 20 are connected to one side of the pressing strip 21, guide fillets are arranged at the end parts of the limiting rods 22, the guide fillets are more convenient to guide in, the pulling strip 18 needs to be fixed on the single plate 2 when being pushed out by the popping block 15 and is stably and fixedly unfolded, so that the limiting rods 22 need to extend into the through holes 2O to stably limit the pulling strip, a magnetic strip 34 is connected to one side of the pulling strip 18, the inner diameter of the through holes 20 is larger than the outer diameter of the limiting rods 22, so that the pulling strip can conveniently extend into the through holes, but the pulling strip is easy to shake through the magnetic strip 34, and is also stably kept through the magnetic strip 34, and a magnetic strip is also arranged in the limiting groove 19, the second spring 23 is connected between the pressing strip 21 and the single plate 2, the spring 23 facilitates automatic reset of the pressing strip 21, so that automatic limiting is facilitated, two ends of the pressing strip 21 are both connected with push blocks 24 for pushing the pressing strip 21, push grooves 25 matched with the push blocks 24 are formed in the supporting block 8, and limiting is required to be relieved when the projection curtain is folded, so that the pressing strip 21 is pushed by blocking the push blocks 24 when the single plate 2 returns to an initial position through the push grooves 25, and limiting rods 22 move to relieve limiting.

The control mechanism 11 comprises two groups of wedge blocks 26 which are slidably connected in the single plate 2 and slidably connected with the ejection block 13, an adjusting rod 27 with two ends connected with the two groups of wedge blocks 26 through threads is connected between the two groups of wedge blocks, the rotating directions of the threads at the two ends of the adjusting rod 27 are opposite, so that the wedge blocks move oppositely or away from each other synchronously when the adjusting rod 27 rotates, an outer gear 28 is arranged on the adjusting rod 27, an adjusting rack 29 with two ends slidably connected with the single plate 2 is connected to the outer gear 28 in a meshed manner, an adjusting block 30 is further connected to the outer side of the adjusting rack 29, the adjusting block 30 is arranged so that the adjusting rack 29 can push the adjusting rack 29, the adjusting rack 29 further drives the outer gear 28 to rotate, and the adjusting rod 27 rotates to drive the wedge blocks 26 to control the position of the ejection block 13.

Two groups of rotating rings 31 are rotatably connected to the adjusting rod 27, a driving gear 32 is fixedly connected to the adjusting rod 27, and a plurality of groups of transmission gears 33 which are respectively in meshed connection with the driving gear 32 and the external gear 28 are rotatably connected between the two groups of rotating rings 31, because only the external gear 28 is needed, the rack 29 needs to be adjusted to move a larger distance, a planetary gear speed reducing mechanism is formed by the driving gear 32, the external gear 28 and the transmission gear 33, the number of rotating turns of the adjusting rod 27 is enlarged, the moving range of the adjusting gear 29 is reduced, and adjustment is facilitated.

Under normal conditions, when the projection curtain 5 is not needed, the ejection block 13 is positioned in the single plate 2, therefore, the ejection block 15 can not push out the pulling strip 18, therefore, the projection curtain 5 can not be pulled out, when the projection curtain 5 needs to be unfolded, the adjusting rack 29 is directly pushed, the adjusting rack 29 drives the external gear 28, further, the driving gear 32 and the transmission gear 33 drive the adjusting rod 27, the adjusting rod 27 enables the wedge 26 to move towards the direction far away from the adjusting rod 27, the ejection block 13 is ejected when the wedge 26 passes through the inclined surface, the ejection block 13 is in sliding connection with the single plate 2 and is limited, the ejection and separation are prevented, the ejection block 13 pushes the pushing block 16, the pushing block 16 extrudes the first spring 17, when the single plate 2 does not move, the ejection block 15 does not extend, the single plate 2 is pushed to return to the initial position, under the action of the first spring 17, the pulling strip 18 enters the limiting groove 19, and because of the action of the pushing groove 25, the push block 24 is blocked to prevent the limiting rod 22 from moving in the limiting groove 19, the single plate 2 is pushed again, the push block 25 is not blocked, the limiting rod 22 limits under the action of the second spring 23, and the device can be adjusted at any position and is simple and convenient to operate.

1-a guide rail; 2-single board; 3-a synchronizing gear; 4-a synchronous rack; 5-projection screen; 6-an adjusting mechanism; 7-a rotating shaft; 8-a support block; 9-retracting the rod; 10-a drive device; 11-a control mechanism; 12-a limiting mechanism; 13-an ejection block; 14-avoidance slots; 15-pop-up block; 16-a pushing block; 17-a first spring; 18-a pull strip; 19-a limit groove; 20-a through hole; 21-pressing the strip; 22-a limiting rod; 23-a second spring; 24-a push block; 25-pushing the groove; 26-wedge block; 27-adjusting rod; 28-an external gear; 29-adjusting the rack; 30-an adjusting block; 31-a rotating ring; 32-a drive gear; 33-a transmission gear; 34-magnetic strip.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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 equipment for information technology teaching, includes two sets of guide rails (1), its characterized in that: the screen curtain is characterized in that two groups of single plates (2) are connected in the guide rail (1) in a sliding manner, synchronous gears (3) are further rotatably connected on the guide rail (1), synchronous racks (4) meshed with the synchronous gears (3) are connected at the upper ends and the lower ends of the single plates (2), a projection screen (5) is arranged between the two groups of synchronous gears (3), an adjusting mechanism (6) capable of unfolding or folding the projection screen (5) when the single plates (2) move is arranged between the two groups of single plates (2) and the guide rail (1), the adjusting mechanism (6) comprises two groups of rotating shafts (7) used for installing the synchronous gears (3), one end of each rotating shaft (7) is rotatably connected with a supporting block (8) in sliding connection with the single plates (2), a folding rod (9) used for rolling up the projection screen (5) is connected between the two groups of rotating shafts (7), and a driving device (10) for unfolding the projection screen (5) is arranged in the supporting block (8), wherein a control mechanism (11) for controlling the driving device (10) is arranged in one group of the single plates (2), a limiting mechanism (12) for limiting the projection curtain (5) is arranged on the other group of the single plates (2), the driving device (10) comprises an ejection block (13) arranged on the single plates (2), a dodging groove (14) in sliding connection with the ejection block (13) is formed in the supporting block (8), an ejection block (15) and a pushing block (16) in sliding connection with the ejection block (13) are connected in the supporting block (8), a first spring (17) is connected between the ejection block (15) and the ejection block (13), one end of the projection curtain (5) is connected with a pulling strip (18) in sliding connection with the supporting block (8) and connected with the limiting mechanism (12), the limiting mechanism (12) comprises a limiting groove (19) which is formed in the single plates (2) and is matched with the pulling strip (18), a plurality of groups of through holes (20) are formed in the pulling strip (18), a pressing strip (21) is further connected in the veneer (2) in a sliding manner, a plurality of groups of limiting rods (22) extending into the through holes (20) are connected to one side of the pressing strip (21), a second spring (23) is connected between the pressing strip (21) and the veneer (2), two ends of the pressing strip (21) are respectively connected with a push block (24) for pushing the pressing strip (21), a push groove (25) matched with the push block (24) is formed in the supporting block (8), the control mechanism (11) comprises two groups of wedge blocks (26) which are connected in the veneer (2) in a sliding manner and are connected with the push block (13) in a sliding manner, an adjusting rod (27) with two ends in threaded connection with the two groups of wedge blocks (26) is connected between the two groups of wedge blocks (26), an external gear (28) is arranged on the adjusting rod (27), and an adjusting rack (29) with two ends in a sliding connection with the veneer (2) is meshed with the external gear (28), the outside of adjusting rack (29) still is connected with regulating block (30), it is connected with two sets of rotating rings (31) to rotate on adjusting pole (27), fixedly connected with drive gear (32) on adjusting pole (27), and is two sets of rotate between rotating ring (31) and be connected with the transmission gear (33) that the multiunit is respectively with drive gear (32) and external gear (28) inner gearing connection.

2. A projection device for information technology teaching according to claim 1, characterized in that: one side of the pulling strip (18) is connected with a magnetic strip (34).

3. A projection device for information technology teaching according to claim 2, characterized in that: the end part of the limiting rod (22) is provided with a guide round angle.