CN216210449U

CN216210449U - Curtain rolling shaft

Info

Publication number: CN216210449U
Application number: CN202122434505.7U
Authority: CN
Inventors: 欧阳卫
Original assignee: Jiangsu Jiuyu Display Technology Co ltd
Current assignee: Jiangsu Jiuyu Display Technology Co ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-04-05
Anticipated expiration: 2031-10-09

Abstract

The utility model relates to the technical field of projection curtains, in particular to a curtain winding shaft which comprises a hollow winding shaft body, wherein the winding shaft body is formed by mutually connecting a first arc surface and a second arc surface, the first arc surface comprises a first end point and a second end point, one end of the second arc surface is connected with the first end point, and the other end of the second arc surface is connected with the second end point; the length of the first arc surface is smaller than that of the second arc surface, and the height of the first end point and the height of the second end point are equal to the thickness of the curtain. The curtain rolling shaft is simple in structure, low in cost and good in rolling effect with the curtain.

Description

Curtain rolling shaft

Technical Field

The utility model relates to the technical field of projection curtains, in particular to a curtain winding shaft.

Background

Currently, with the rapid development of projection technology, projection screens for projection apparatuses are more and more commonly installed in various places. The maintenance of the projection screen directly affects the projection effect of the projector, such as distortion of the image, stains, etc. Before the curtain is installed, in order to save space, the curtain is generally wound up by a cylindrical reel. Because the cylindrical surface is a perfect circle, the curtain needs to be wound layer by layer for winding. This kind of rolling mode is because there is the space difference between the initial point of first layer curtain and the two layers of curtain intersect, and the shape takes place the deformation when the curtain is shelved for a long time, and then influences the bandwagon effect of later stage curtain.

Therefore, a technique for solving this problem is urgently required.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the problems in the prior art and provides a curtain winding shaft, which eliminates the space difference between the starting point of the first layer of curtain and the cross point of the two layers of curtains by arranging a height difference on the surface of a winding shaft body, so that the curtain can be wound well and is not easy to deform after being placed for a long time.

The above purpose is realized by the following technical scheme:

a curtain winding shaft comprises a hollow winding shaft body, wherein the winding shaft body is formed by mutually connecting a first arc surface and a second arc surface, the first arc surface comprises a first end point and a second end point, one end of the second arc surface is connected with the first end point, and the other end of the second arc surface is connected with the second end point; the length of the first arc surface is smaller than that of the second arc surface, and the height of the first end point and the height of the second end point are equal to the thickness of the curtain.

Further, the length of the first arc surface is 2 mm-5 mm.

Furthermore, a cylindrical cavity groove with a notch is formed along the first arc surface, and the caliber of the notch is larger than the thickness of the curtain and smaller than the inner diameter of the cylindrical cavity groove.

Further, cylindrical reinforcing bar is established to the embedded cylindrical cavity groove, the reinforcing bar passes through the one end winding of curtain.

Further, the outer diameter of the steel bar is larger than the caliber of the notch and smaller than the inner diameter of the cylindrical cavity groove.

Further, the wall thickness of the reel body is larger than the thickness of a single-layer curtain and smaller than the thickness of ten layers of curtains.

Furthermore, the reel body is integrally formed and made of metal or plastic.

Furthermore, the reel body is formed by mutually bonding the first arc surface and the second arc surface and is made of plastic or paper materials.

Advantageous effects

According to the curtain winding shaft provided by the utility model, the height difference is arranged on the surface of the winding shaft body to eliminate the space difference between the initial point of the first layer of curtain and the cross point of the two layers of curtains, so that the curtains can be well wound and are not easy to deform after being placed for a long time. The curtain rolling shaft is simple in structure, low in cost and good in rolling effect with the curtain.

Drawings

FIG. 1 is a side view of a curtain take-up shaft according to the present invention;

FIG. 2 is a schematic view of a curtain being wound by the curtain winding shaft according to the present invention;

FIG. 3 is a schematic view of a second structure of a curtain winding shaft according to the present invention.

Graphic notation:

1-scroll body, 2-first arc surface, 3-second arc surface, 4-first end point, 5-second end point, 6-notch, 7-cylindrical cavity groove, 8-curtain and 9-reinforcing steel bar.

Detailed Description

The utility model is explained in more detail below with reference to the figures and examples. The described embodiments are only some embodiments of the utility model, not all 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.

As shown in fig. 1-3, a curtain winding shaft includes a hollow winding shaft body 1, the winding shaft body 1 is formed by connecting a first arc surface 2 and a second arc surface 3, the first arc surface 2 includes a first end point 4 and a second end point 5, one end of the second arc surface 3 is connected to the first end point 4, and the other end of the second arc surface 3 is connected to the second end point 3; the length of the first arc surface 2 is smaller than the length 3 of the second arc surface, and the height of the first end point 4 and the second end point 5 is equal to the thickness of the curtain 8.

The length of the first arc surface 2 is 2 mm-5 mm.

As a modified scheme of the utility model, the method comprises the following steps:

and a cylindrical cavity groove 7 with a notch 6 is formed along the first arc surface 2, and the caliber of the notch 6 is larger than the thickness of the curtain 8 and smaller than the inner diameter of the cylindrical cavity groove 7.

Cylindrical reinforcing bar 9 is used for the embedding to establish in the cylindrical chamber groove 7, reinforcing bar 9 passes through the one end winding of curtain 1 is as the initial point of first layer curtain 8. During installation, the reinforcing steel bar 9 is inserted along one end of the cylindrical cavity groove 7.

In order to better limit the reinforcing steel bars 9, the outer diameter of the reinforcing steel bars 9 is larger than the caliber of the notch 6 and smaller than the inner diameter of the cylindrical cavity groove 7.

As a definition of the scroll body 1 in this specification, the wall thickness of the scroll body 1 is larger than the thickness of a single layer of the curtain 8 and smaller than the thickness of ten layers of the curtain 8.

During processing and production, the scroll body 1 is integrally formed and made of metal or plastic. Or, the scroll body 1 is formed by mutually bonding the first arc surface 2 and the second arc surface 3 and is made of plastic or paper material.

The above description is for the purpose of illustrating embodiments of the utility model and is not intended to limit the utility model, and it will be understood by those skilled in the art that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A curtain rolling shaft comprises a hollow winding shaft body and is characterized in that the winding shaft body is formed by mutually connecting a first arc surface and a second arc surface, the first arc surface comprises a first end point and a second end point, one end of the second arc surface is connected with the first end point, and the other end of the second arc surface is connected with the second end point; the length of the first arc surface is smaller than that of the second arc surface, and the height of the first end point and the height of the second end point are equal to the thickness of the curtain.

2. The curtain winding shaft as claimed in claim 1, wherein the first arc surface has a length of 2mm to 5 mm.

3. The curtain winding shaft as claimed in claim 2, wherein a cylindrical cavity groove with a notch is formed along the first arc surface, and the caliber of the notch is larger than the thickness of the curtain and smaller than the inner diameter of the cylindrical cavity groove.

4. A curtain take-up shaft as claimed in claim 3, wherein the cylindrical cavity is provided with a cylindrical reinforcement embedded therein, the reinforcement being wound around an end of the curtain.

5. A curtain take-up shaft as claimed in claim 4, wherein the outer diameter of the reinforcing bars is greater than the diameter of the slots and less than the inner diameter of the cylindrical cavity.

6. A curtain take-up spindle as in claim 1, wherein the thickness of the wall of the spool body is greater than the thickness of a single layer of the curtain and less than the thickness of ten layers of the curtain.

7. A curtain take-up shaft as claimed in claim 1, wherein the winding shaft body is integrally formed of metal or plastic.

8. A curtain winding shaft as claimed in claim 1, wherein the winding shaft body is formed by bonding the first arc surface and the second arc surface to each other, and is made of plastic or paper material.