CN215416261U

CN215416261U - Width-variable projection curtain for teaching

Info

Publication number: CN215416261U
Application number: CN202121605417.2U
Authority: CN
Inventors: 朱燕群
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2022-01-04
Anticipated expiration: 2031-07-15

Abstract

The utility model discloses a width-variable projection curtain for teaching, which comprises a motor, a winding shaft connected with the motor, and a curtain with the top fixedly connected with the winding shaft; the winding shaft comprises a sleeve reel and an inserting reel which are movably connected in the transverse direction and fixedly connected in the longitudinal direction, the inserting reel comprises a body shaft and a central shaft, and the curtain comprises a first curtain and a second curtain; the upper end of the first curtain is fixedly connected with the sleeve reel, and the upper end part of the second curtain is fixedly connected with the body shaft. The width-variable projection curtain for teaching can adjust the width and the height according to the requirements of users when in use through the structural design, and meets the use requirements of teachers on different projection areas.

Description

Width-variable projection curtain for teaching

Technical Field

The utility model relates to the field of projection equipment, in particular to a width-variable projection curtain for teaching.

Background

In a modern teaching classroom, most teachers adopt a multimedia teaching mode to reasonably select and use modern teaching media to achieve an optimal teaching effect.

In multimedia teaching, a projector is combined with a projection screen for teaching; as shown in fig. 1, when the conventional projection curtain is used, the height of the projection curtain can be adjusted only according to the requirement, but the width of the projection curtain cannot be adjusted according to the requirement. Therefore, when the projection area is wider or narrower, the conventional projection curtain cannot meet the requirement.

Disclosure of Invention

The utility model overcomes the defects in the prior art, provides the width-variable projection curtain for teaching, and solves the problem that the width of the projection curtain in the prior art cannot be adjusted.

The technical scheme of the utility model is realized as follows:

the width-variable projection curtain for teaching comprises a motor, a winding shaft connected with the motor, and a curtain with the top fixedly connected with the winding shaft; the winding shaft comprises a sleeve reel and an inserting reel which are movably connected in the transverse direction and fixedly connected in the longitudinal direction, the inserting reel comprises a body shaft and a central shaft, and the curtain comprises a first curtain and a second curtain; the upper end of the first curtain is fixedly connected with the sleeve reel, and the upper end part of the second curtain is fixedly connected with the body shaft.

The motor drives the winding shaft to rotate, and the winding shaft rotates to pack up or put down the curtain; the central shaft moves left and right in the sleeve scroll to drive the second curtain to move. When the first and second curtain overlapping parts are more, the whole width of the curtain is narrowed, and when the first and second curtain overlapping parts are less, the whole width of the curtain is widened.

Preferably, the sleeve reel and the insertion reel are transversely movably connected and longitudinally fixedly connected in the following manner: one end of the sleeve scroll close to the splicing scroll is provided with a hollow groove for the central shaft to be spliced in.

Preferably, the sleeve reel and the insertion reel are transversely movably connected and longitudinally fixedly connected in the following manner: the sleeve reel is provided with a slide rail, the central shaft is provided with a slide block, and the slide block transversely slides in the slide rail.

Preferably, the cross section of the hollow groove is square.

Preferably, the second curtain is divided into a fixed part fixedly connected with the body shaft and a movable part below the central shaft, and the uppermost end of the movable part is lower than the uppermost end of the fixed end.

Preferably, the first curtain or the second curtain is fixedly connected with the winding shaft in the following manner: the winding shaft is provided with a transverse groove, the upper end of the first curtain or the second curtain is provided with a transverse bar, and the transverse bar is inserted into the transverse groove.

Preferably, the movable part of second curtain is equipped with a joint spare in the upper end that is close to first curtain one side, the corresponding position of first curtain be equipped with joint spare sliding connection's joint groove.

Preferably, the clamping piece is I-shaped, and the clamping groove is C-shaped.

Preferably, the lower support edge strip comprises a first support edge strip arranged at the lower end of the first curtain and a second support edge strip arranged at the lower end of the movable part of the second curtain, and the first support edge strip and the second support edge strip are sleeved together.

The design starting point, the idea and the beneficial effects of the utility model adopting the technical scheme are as follows:

the width-variable projection curtain for teaching can adjust the width and the height according to the requirements of users when in use through the structural design, and meets the use requirements of teachers on different projection areas.

Drawings

FIG. 1 is a schematic diagram of a prior art projection curtain;

FIG. 2 is a schematic view of a projection curtain in an embodiment of the utility model;

FIG. 3 is a schematic view of a projection curtain in use in an embodiment of the utility model;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic view of an embodiment of the present invention in which the projection screen is at its narrowest;

FIG. 6 is a schematic view of a widest projection curtain according to an embodiment of the present invention;

FIG. 7 is a partial side view of a first embodiment of the present invention showing the lower support perimeter nested within one another;

fig. 8 is a partial side view of a second embodiment of the utility model in which the lower support edge bars are nested with each other.

The figures are numbered: a motor 1; a winding shaft 2; a sleeve reel 21; a hollow groove 211; a transverse slot 212; an insertion reel 22; a body shaft 221; a central axis 222; a housing 3; a lower supporting edge strip 4; a first screen 5; a cross bar 51; a clip groove 52; the first support edge 53; a second curtain 6; a fixed portion 61; a movable portion 62; a second support bead 621; the clip member 63.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, the term "at least one" means one or more than one unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The specific embodiment of the utility model is as follows:

example (b): as shown in fig. 2-4, the present invention provides a width-variable projection curtain for teaching, which comprises a motor 1, a winding shaft 2, a housing 3, a curtain and a lower supporting edge strip 4.

As shown in fig. 2, the housing 3 is sleeved outside the winding shaft 2 to shield the winding shaft 2, so that the appearance of the winding shaft is more beautiful. The curtain upper end and 2 fixed connection of rolling axle, the curtain lower extreme be connected with lower support strake 4. The curtain comprises a first curtain 5 and a second curtain 6.

As shown in fig. 3-6, the winding shaft 2 includes a sleeve reel 21 and an insertion reel 22, and the sleeve reel 21 is connected to the motor 1; the inserting reel 22 includes a body shaft 221 and a central shaft 222 extending from one end of the body shaft 221 close to the sleeve shaft, in this embodiment, the cross section of the central shaft 222 is square. One end of the sleeve scroll 21 close to the inserting scroll 22 is provided with a hollow groove 211 for inserting the central shaft 222, and the section of the hollow groove 211 is also square. When the sleeve reel 21 rotates, the central shaft 222 is driven to rotate synchronously, and the central shaft 222 drives the body shaft 221 to rotate simultaneously, so that the first curtain 5 and the second curtain 6 are wound up synchronously.

The upper end of the first curtain cloth 5 is fixedly connected with a sleeve scroll 21; the second curtain 6 is divided into a fixed part 61 fixedly connected with the main body shaft 221 and a movable part 62 positioned below the central shaft 222, and the uppermost end of the movable part 62 is lower than the uppermost end of the fixed part 61.

As shown in fig. 4, specifically, a transverse bar 51 is bonded to each of the upper end of the first curtain 5 and the upper end of the fixing portion 61 of the second curtain 6, a transverse groove 212 is formed in each of the sleeve reel 21 and the main body shaft 221, the transverse bar 51 is inserted into the transverse groove 212, the upper end of the first curtain 5 is fixedly connected to the sleeve reel 21, and the upper end of the fixing portion 61 of the second curtain 6 is fixedly connected to the main body shaft 221.

The movable part 62 of second curtain 6 bonds in the upper end that is close to first curtain 5 one side and has a cross-section to be the joint spare 63 of I shape, first curtain 5 correspond the position bond have with joint spare 63 sliding connection's joint groove 52, in this embodiment, the cross-section of joint groove 52 be the C style of calligraphy. When the clamping piece 63 slides left and right in the clamping groove 52, the width of the curtain is changed.

As shown in fig. 5, when the central shaft 222 is completely inserted into the sleeve roller 21, the movable portion 62 of the second curtain 6 is completely covered by the first curtain 5, and the width of the curtain is the narrowest; as shown in fig. 6, when the central shaft 222 is just inserted into the sleeve roller 21, one side of the movable portion 62 of the second curtain 6 is just staggered and spliced with one side of the first curtain 5, and the width of the curtain is the widest.

As shown in fig. 7, the lower support edge strips 4 include a first support edge strip 53 adhered to the lower end of the first curtain 5 and a second support edge strip 621 adhered to the lower end of the movable portion 62 of the second curtain 6, and the first support edge strip 53 and the second support edge strip 621 are sleeved together.

As shown in fig. 8, it is another embodiment of the first support edge 53 and the second support edge 621 of the lower support edge 4.

When the first curtain 5 moves left and right, the first supporting edge 53 moves synchronously relative to the second supporting edge 621; when the second curtain 6 moves left and right, the second supporting edge 621 moves synchronously with respect to the first supporting edge 53.

Claims

1. A but, width projection curtain for teaching, including the motor, its characterized in that: the curtain also comprises a winding shaft connected with the motor, and a curtain with the top fixedly connected with the winding shaft; the winding shaft comprises a sleeve reel and an inserting reel which are movably connected in the transverse direction and fixedly connected in the longitudinal direction, the inserting reel comprises a body shaft and a central shaft, and the curtain comprises a first curtain and a second curtain; the upper end of the first curtain is fixedly connected with the sleeve reel, and the upper end part of the second curtain is fixedly connected with the body shaft.

2. The variable width projection curtain for teaching of claim 1, wherein: the sleeve reel and the splicing reel are transversely movably connected and longitudinally fixedly connected in a mode that: one end of the sleeve scroll close to the splicing scroll is provided with a hollow groove for the central shaft to be spliced in.

3. The variable width projection curtain for teaching of claim 1, wherein: the sleeve reel and the splicing reel are transversely movably connected and longitudinally fixedly connected in a mode that: the sleeve reel is provided with a slide rail, the central shaft is provided with a slide block, and the slide block transversely slides in the slide rail.

4. The variable width projection curtain for teaching of claim 2, wherein: the cross section of the hollow groove is square.

5. The variable width projection curtain for teaching of claim 1, wherein: the second curtain be for with body axle fixed connection's fixed part and be in the movable part of center pin below, the top of movable part be less than the fixed part the top.

6. The variable width projection curtain for teaching of claim 1, wherein: the first curtain or the second curtain is fixedly connected with the winding shaft in the following mode: the winding shaft is provided with a transverse groove, the upper end of the first curtain or the second curtain is provided with a transverse bar, and the transverse bar is inserted into the transverse groove.

7. The variable width projection curtain for teaching of claim 5, wherein: the movable part of second curtain is equipped with a joint spare in the upper end that is close to first curtain one side, the corresponding position of first curtain be equipped with joint spare sliding connection's joint groove.

8. The variable width projection curtain for teaching of claim 7, wherein: the clamping piece is I-shaped, and the clamping groove is C-shaped.

9. The variable width projection curtain for teaching of claim 5, wherein: the curtain lower extreme be connected with the lower support strake, the lower support strake support the strake including the first support strake of locating the lower extreme of first curtain and the second of locating the lower extreme of the movable part of second curtain, first support strake and second support strake cup joint together each other.