CN113738248A

CN113738248A - Detachable shutter curtain blade structure

Info

Publication number: CN113738248A
Application number: CN202110770367.1A
Authority: CN
Inventors: 刘战胜
Original assignee: Hangzhou Yazi Window Decoration Materials Co ltd
Current assignee: Hangzhou Yazi Window Decoration Materials Co ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2021-12-03
Anticipated expiration: 2041-07-07
Also published as: CN113738248B

Abstract

The invention discloses a detachable shutter blade structure, and relates to the technical field of curtains. The blade is provided with a rope pulling hole and a rope passing groove, the rope pulling hole is a long circular hole, a connecting line of two circular arc centers of the long circular hole is perpendicular to the central axis of the blade, one end of the rope passing groove is communicated with the circular arc hole wall of the rope pulling hole, the other end of the rope passing groove is communicated with the side face of the blade, the blade is connected with a rotatable cover plate assembly, the cover plate assembly covers the rope passing groove, the hole wall of the rope pulling hole is closed, the rope pulling hole is penetrated through the rope pulling hole, the cover plate assembly leaves the rope passing groove, a notch is formed in the hole wall of the rope pulling hole, and the rope pulling is separated from the blade. The invention overcomes the defect that the operation of the blades of the detachable part of the blind curtain in the prior art is complicated, and has the beneficial effects that: each blade of the blind can be independently disassembled and assembled with the pull rope, tools are not needed for disassembling and assembling the blades, the operation is simple, and the service life of the blind is prolonged.

Description

Detachable shutter curtain blade structure

Technical Field

The invention relates to the related technical field of curtains, in particular to a structure of detachable shutter curtain blades.

Background

The pull rope of the blind is arranged for lifting the curtain blades in the window. The pull rope is pulled down, and all the blades of the blind are folded towards the top surface of the window. The pulling rope retracts, and all the blades of the blind are unfolded towards the bottom surface of the window. Meanwhile, the stay cord penetrates through the stay cord hole on the blade to connect the blades of the whole curtain in series, so that the displacement of the blades placed in the ladder cord is prevented. Typically, the drawstring holes are on the central axis of the leaflets, running through the leaflet surface but not communicating with the leaflet sides. If one blade in the blind is stained or damaged and needs to be detached, the pulling rope can be withdrawn from the pulling rope holes of all the blades. After the processed blades are replaced, the stay ropes need to penetrate through the stay rope holes in all the blades, and the installation can be completed, which is very troublesome.

Disclosure of Invention

The invention provides a detachable shutter blade structure for overcoming the defect that the operation of detaching partial blades of a shutter is complex in the prior art, and achieves the purposes of independently detaching each blade in the shutter, along with simple operation and prolonging the service life of the shutter.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a detachable shutter curtain blade structure, it includes blade, stay cord, the blade is equipped with the stay cord hole, crosses the grooving, the stay cord hole is the line at slotted hole and two circular arcs centers perpendicular with the axis of blade, the one end of crossing the grooving communicates with the circular arc pore wall in stay cord hole, the other end of crossing the grooving is opened with the side of blade, the blade is connected with rotatable apron subassembly, the apron subassembly covers the grooving, and the pore wall in stay cord hole is closed, the stay cord runs through the stay cord hole, the apron subassembly leaves the grooving, and the pore wall in stay cord hole forms the breach, the stay cord is thrown off with the blade.

The stay cord hole crosses the central axis of the blade. The arc of one end of the stay cord hole is near the central axis of the blade, and the arc of the other end of the stay cord hole is closer to the side surface of the blade. The convenient pull rope is arranged on the central axis of the blade, and the lifting stress of the blade is relatively balanced. The pull ropes penetrate through the pull rope holes of all the blades of the blind, and the blades are connected in series to realize downward expansion or upward contraction of the blades of the blind. The rope passing groove penetrates through the upper surface and the lower surface of the blade. The width of the rope passing groove is smaller than the width of the rope pulling hole and is larger than or equal to the diameter of the rope pulling hole. The side surfaces of the blades are communicated with the arc hole wall of the stay rope hole through the stay rope groove, a notch is formed in the hole wall of the stay rope hole at the position where the stay rope hole is communicated with the stay rope groove, and the stay rope hole is an open hole. When the blade is disassembled, the stay cord can leave the stay cord hole from the notch and then goes out of the side surface of the blade through the cord passing groove, and the cord is separated from the blade. During normal use, the cover plate assembly covers the rope passing groove, the rope pulling hole is closed with the arc hole wall notch communicated with the rope passing groove, the rope pulling hole is a non-notched closed long round hole, and the pulling rope penetrates through the rope pulling hole to meet normal use of the pulling rope. Each blade in the blind can be independently disassembled and assembled, the operation of replacing the blades is simple, and the service life of the blind is prolonged.

Preferably, the apron subassembly includes upper cover plate, connecting plate, apron down, a side of upper cover plate is connected with a side of connecting plate, the another side of upper cover plate is unsettled, the another side of connecting plate is connected with a side of apron down, the another side of apron is unsettled down, the upper surface of blade, side, lower surface are equipped with the apron combination recess of sunken surface and intercommunication, the apron subassembly covers the grooving, and upper cover plate, connecting plate, apron and apron combination recess gomphosis down. The upper cover plate, the connecting plate and the lower cover plate are sequentially connected, and the cross section of the cover plate component is U-shaped. The cover plate combining groove is arranged and communicated along the upper surface, the side surface and the lower surface of the blade, and the cross section of the cover plate combining groove is in a U shape. The cover plate assembly is embedded with the cover plate combination groove, and the surfaces of the upper cover plate, the connecting plate and the lower cover plate are respectively flush with the upper surface, the side surface and the lower surface of the blade. The cover plate component does not affect the appearance of the blades and meets the requirement of the shutter curtain on use comfort.

As preferred, the blade is equipped with connecting piece storehouse, elastic connection spare, the connecting piece storehouse is located one side of crossing the grooving, the connecting piece storehouse is the blind hole, the hole bottom surface in connecting piece storehouse is parallel with the axis of blade, the opening in connecting piece storehouse is crossing the grooving and is opening with the side with the blade, the internal surface of connecting plate is equipped with bellied connection platform, elastic connection spare is the bar, elastic connection spare's one end is connected with the end in connecting piece storehouse, elastic connection spare's the other end is connected with the bellied face of being connected the platform, apron subassembly combines the recess gomphosis with the apron, connects a platform embedding connecting piece storehouse. The face of the web in the half enclosure of the cap assembly is the inner face of the web. The elastic connecting piece is used for keeping the cover plate assembly and the cover plate combining groove to be always in an embedded state, the stay cord hole is in a gapless closed shape, and the stay cord works smoothly. The joint table strengthens the connection strength of the cover plate assembly and the elastic connecting piece, and prevents the cover plate assembly from deforming so as to avoid influencing the appearance of the blade. The cover plate assembly is connected with the blades more closely and attached. The appearance of the blade is not affected, and the requirement of use comfort level is met.

Preferably, the upper cover plate and the lower cover plate are respectively provided with an arc-shaped groove, the grooves are respectively positioned on one side of the suspension surfaces of the upper cover plate and the lower cover plate, the openings of the grooves are positioned on the surfaces of the suspension surfaces, and the arcs of the grooves are matched with the arcs of the rope pulling holes. The cover plate assembly covers the rope passing groove, the arc of the groove is matched with the arc of the rope pulling hole, the hole wall of the rope pulling hole is smooth after being closed, the abrasion of the pulling rope is reduced, and the service life of the blind curtain is prolonged.

Preferably, the upper cover plate and the lower cover plate are respectively provided with a connecting rotating shaft, the connecting rotating shaft is tubular, one end of the connecting rotating shaft is connected with the upper cover plate or the lower cover plate, the other end of the connecting rotating shaft is suspended, the connecting rotating shaft is provided with a plurality of uniformly distributed long grooves, the length direction of each long groove is consistent with the axis direction of the connecting rotating shaft, the long grooves penetrate through the suspended end of the connecting rotating shaft, the blades are provided with connecting holes penetrating through the upper surface and the lower surface, and the connecting rotating shaft is in transition fit with the connecting holes. In order to facilitate installation, the connecting rotating shaft cannot be too long, the connecting rotating shaft is set to be tubular, a plurality of long grooves are uniformly distributed in the tubular shape, the long grooves are provided with hanging ends connected with the rotating shaft, the hanging ends connected with the rotating shaft have micro elasticity, the connecting rotating shaft can slightly deform during installation, and the installation is facilitated. The cover plate assembly is flexibly rotated by connecting the connecting rotating shaft with the connecting hole.

Preferably, the hole wall of the connecting hole is provided with an annular connecting groove with a concave surface, the hanging end of the connecting rotating shaft is provided with a connecting hook with a convex outer side surface, and the connecting hook is embedded with the connecting groove. The connecting groove is arranged along the circumference of the hole wall of the connecting hole. The connecting groove is sunken in the hole wall of the connecting hole. The connecting rotating shaft is sleeved with the connecting hole, the hook head of the connecting hook is embedded into the connecting groove, the cover plate assembly is prevented from being separated from the blade due to the fact that the connecting rotating shaft slides out of the connecting hole, and the cover plate assembly is reliably connected with the blade.

Preferably, the connecting piece bin is a flat hole, the longitudinal section of the connecting piece bin is trapezoidal, the hole wall of the connecting piece bin close to the rope passing groove is parallel to the rope passing groove, the hole wall of the connecting piece bin far away from the rope passing groove is inclined, and the opening of the connecting piece bin is larger than the hole bottom. Because the blades are strip-shaped, in order to ensure the strength of the blades, the connecting holes do not penetrate through the upper surface and the lower surface of the blades, and the connecting holes are in an outward divergence shape in the length direction of the blades. For the compact structure, the connecting hole is closer to the rope passing groove, the hole wall of the connecting hole close to the rope passing groove is parallel to the rope passing groove, and the hole wall on the opposite side is inclined. The connecting hole is flat horn shape, avoids elastic connecting piece and the pore wall of connecting hole to rub and bump when the apron subassembly rotates, reduces elastic connecting piece's wearing and tearing, increase of service life.

Preferably, the rope passing groove is provided with a rope releasing surface, the rope releasing surface is an arc surface, one side of the rope releasing surface is in smooth connection with the wall of the rope passing groove, and the other side of the rope releasing surface is in smooth connection with the side surface of the blade. The opening of the rope groove is formed in the opening position of the side face of the rope groove and the side face of the blade, the stay rope is separated from the gate of the blade, the opening of the rope groove is increased by the arc of the rope separating face, and the stay rope can be conveniently separated from the blade only by rotating a small angle of the cover plate assembly, so that the operation is convenient.

Preferably, the elastic connecting member is a flat spring. Good elasticity, durability and prolonged service life.

Preferably, the elastic connecting piece is a rubber band. The cost is lowest while the elasticity is ensured.

The invention has the beneficial effects that: each blade of the blind can be independently disassembled and assembled with the pull rope, tools are not needed for disassembling and assembling the blades, the operation is simple, and the service life of the blind is prolonged. Compact structure, occupation space is little, and the back is accomplished in the blade installation, does not influence the stay cord and uses, and the blade global sensation is good, accords with the requirement of venetian blind use comfort level.

Drawings

FIG. 1 is a top view of a blade according to the present invention;

FIG. 2 is an enlarged partial view of the attachment of the cover plate assembly to the bucket of FIG. 1;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is an enlarged view of B of FIG. 3;

FIG. 5 is a cross-sectional view taken at C-C of FIG. 3;

fig. 6 is an enlarged view of a portion of the pull cord as it exits the blade.

In the figure:

a blade 1; a stay wire hole 11; a cover plate coupling groove 12; a rope passing groove 13; a connector housing 14; a connecting hole 15; a rope-releasing surface 131; a connecting groove 151;

a cover plate component 2; an upper cover plate 21; a connecting plate 22; a lower cover plate 23; a connecting rotating shaft 24; a recess 25; a connection stage 221; a connecting hook 241;

an elastic connecting member 3;

and a pull rope 4.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

Example 1:

as shown in figure 1, the detachable shutter blade structure of the shutter comprises blades 1 and a pull rope 4. FIG. 1 is a top view of a blade of the present invention. In fig. 1: the upper and lower sides of the figure show the front and rear sides of the blade 1; the left and right sides of the figure show the left and right sides of the blade 1; the figures show the upper and lower sides of the blade 1 facing away from the reader. The blade 1 is provided with a stay wire hole 11. The stay cord hole 11 is a long round hole, and the connecting line of the centers of the two arcs is vertical to the central axis of the blade 1. The guy hole 11 crosses the central axis of the blade 1. The left end circular arc of stay cord hole 11 is on the left side of the axis of blade 1, and the right-hand member circular arc of stay cord hole 11 is close to the right flank of blade 1. The pulling rope 4 passes through the pulling rope hole 11. The curtain of the blind consists of a plurality of blades 1. The stay cord 4 passes through the stay cord holes 11 in all the blades 1 of the blind and connects the blades 1 in series for realizing the downward expansion or the upward furling of the blades of the blind.

As shown in figure 2, the blade 1 is provided with a rope passing groove 13, a connecting piece bin 14 and an elastic connecting piece 3. The left end of the rope passing groove 13 is communicated with the arc hole wall at the right end of the rope pulling hole 11. The right end of the rope passing groove 13 is communicated with the right side surface of the blade 1. The groove width of the rope passing groove 13 is slightly larger than or equal to the diameter of the pull rope 4. The rope passing groove 13 is provided with a rope disengaging surface 131. The rope release surface 131 is located on the rear groove wall of the rope groove 13. The rope releasing surface 131 is a circular arc surface. The left side of the rope-disengaging surface 131 is smoothly connected with the right end of the groove wall of the rope-passing groove 13. The right side of the rope release surface 131 is smoothly connected with the right side surface of the blade 1. The connector housing 14 is blind. The connector compartment 14 is located in front of the rope passage 13. The bottom of the hole of the connector bin 14 is parallel to the central axis of the blade 1. The opening of the connector bin 14 is on the right side of the rope groove 13. The connector housing 14 is a flat bore. The opening of the connector housing 14 is larger than the bottom of the hole. The openings of connector housing 14 diverge outwardly in the direction of the length of blade 1. The connector housing 14 is flat and trumpet shaped. The longitudinal cross-section of the connector housing 14 is trapezoidal. The rear side hole wall of the connector bin 14 is parallel to the rope passing groove 13. The forward aperture wall of the connector magazine 14 is inclined. The hole walls of the upper and lower sides of the connector housing 14 are parallel to the upper and lower surfaces of the blade 1. The elastic connecting piece 3 is strip-shaped. The elastic connection 3 may be a spring, a rubber band, or the like. The elastic connecting member 3 of the present embodiment is described by taking a spring as an example. The spring is a flat spring due to the limitation of the thickness of the blade 1. The flat spring is located in the connector housing 14.

As shown in fig. 2 and 3, the blade 1 is connected with a rotatable cover plate assembly 2. The cover plate assembly 2 comprises an upper cover plate 21, a connecting plate 22 and a lower cover plate 23. The right side surface of the upper cover plate 21 is connected to the upper side surface of the connection plate 22. The left side of the upper cover plate 21 is suspended. The lower side of the connecting plate 22 is connected to the right side of the lower cover plate 23. The left side of the lower cover plate 23 is suspended. The upper cover plate 21, the connecting plate 22 and the lower cover plate 23 are connected in sequence, the cross section of the cover plate component 2 is in a transverse U shape, and the opening faces to the left side. The surface of the connecting plate 22 facing the opening of the lid assembly 2 is the inner surface of the connecting plate 22. The inner surface of the connection plate 22 is provided with a convex connection land 221. The connection land 221 protrudes from the inner surface of the connection plate 22. The left end of the flat spring is connected with the bottom of the connecting piece bin 14, and the right end of the flat spring is connected with the convex surface of the connecting platform 221.

As shown in fig. 6, the upper cover plate 21 and the lower cover plate 23 are respectively provided with circular arc-shaped grooves 25. The groove 25 is respectively positioned on one side of the suspension surface of the upper cover plate 21 and the lower cover plate 23. The openings of the grooves 25 are located on the surfaces of the left side surfaces of the upper cover plate 21 and the lower cover plate 23. The arc of the groove 25 is the same as the arc of the pull rope hole 11 in shape and size. The upper surface, the right side surface and the lower surface of the blade 1 are provided with cover plate combining grooves 12 which are concave surfaces and communicated with each other. The shape, size and depth of the cover plate coupling groove 12 at the upper surface of the blade 1 are the same as those of the upper cover plate 21. The shape, size and depth of the shroud-coupling groove 12 at the right side of the blade 1 are the same as those of the connection plate 22. The shape, size and depth of the cover plate coupling groove 12 at the lower surface of the blade 1 are the same as those of the lower cover plate 23. The right end of the cover plate coupling groove 12 at the upper surface of the vane 1 is communicated with the upper end of the cover plate coupling groove 12 at the right side surface of the vane 1. The right end of the cover plate coupling groove 12 at the lower surface of the vane 1 is communicated with the lower end of the cover plate coupling groove 12 at the right side surface of the vane 1. The cover plate combining groove 12 is in a transverse U-shape in section.

As shown in fig. 2, the cover member 2 is fitted into the cover coupling groove 12, and the cover member 2 covers the rope groove 13. The cover plate assembly 2 is subjected to the tensile force of the elastic connection member 3, and the connection table 221 is embedded in the connection member magazine 14. The upper cover plate 21, the connecting plate 22 and the lower cover plate 23 are respectively embedded in the cover plate combining grooves 12 on the upper surface, the right side surface and the lower surface of the blade 1. The surfaces of the upper cover plate 21, the connecting plate 22 and the lower cover plate 23 are respectively flush with the upper surface, the right side surface and the lower surface of the blade 1. The upper cover plate 21 covers the opening of the rope passage 13 on the upper surface of the blade 1. The lower cover plate 23 covers the opening of the rope passage 13 at the lower surface of the blade 1. The groove 25 at the left end of the upper cover plate 21 coincides with the arc of the rope passing groove 13 located on the right side of the upper surface of the blade 1. The groove 25 at the left end of the lower cover plate 23 coincides with the arc of the rope passing groove 13 on the right side of the lower surface of the blade 1. The stay wire hole 11 is of an unnotched closed shape. The cover plate component 2 is connected with the blade 1 into a whole. The stay cord 4 passes through the stay cord holes 11 in all the blades 1 of the blind and connects the blades 1 in series for realizing the downward expansion or the upward furling of the blades of the blind.

As shown in fig. 3, 4 and 5, the upper cover plate 21 and the lower cover plate 23 are respectively provided with a connecting rotating shaft 24. The connecting rotating shaft 24 is tubular and has two connecting rotating shafts. The connecting shaft 24 is near the front ends of the upper cover plate 21 and the lower cover plate 23. The lower surface of the upper cover plate 21 is connected with the upper end of a connecting rotating shaft 24, the lower end of the connecting rotating shaft 24 is suspended, and the axis of the connecting rotating shaft 24 is vertical to the lower surface of the upper cover plate 21. The upper surface of the lower cover plate 23 is connected with the lower end of another connecting rotating shaft 24, the upper end of the connecting rotating shaft 24 is suspended, and the axis of the connecting rotating shaft 24 is vertical to the upper surface of the lower cover plate 23. The connecting rotating shaft 24 is provided with a plurality of uniformly distributed long grooves. The longitudinal direction of the long groove coincides with the axial direction of the connecting shaft 24. The long groove extends from the connecting part of the connecting rotating shaft 24 and the upper cover plate 21 and the lower cover plate 23 to the hanging end of the connecting rotating shaft 24. The long groove is connected with the suspended end of the rotating shaft 24 in a penetrating way. In this embodiment, there are eight elongated slots, which divide the connecting shaft 24 into eight circular arc strips. One end of the arc strip is fixed with the upper cover plate 21 and the lower cover plate 23, and the other end is suspended. The hanging end of the connecting rotating shaft 24 is provided with a connecting hook 241 protruding the outer side surface. The connecting hook 241 is located on the arc convex surface of the free end of the arc strip. The blade 1 is provided with a connection hole 15 penetrating the upper and lower surfaces. The connecting holes 15 are located in front of the link magazine 14. The diameter of the connecting hole 15 is equal to the diameter of the outer side surface of the connecting rotating shaft 24. The hole wall of the connection hole 15 is provided with a ring-shaped connection groove 151 of a depressed surface. The connection groove 151 is formed along a circumference of a hole wall of the connection hole 15. The two connecting grooves 151 are respectively located at positions close to the upper and lower surfaces of the blade 1. The coupling grooves 151 are spaced apart from the upper and lower surfaces of the blade 1 by the same length as the coupling rotation shaft 24. The connecting rotating shaft 24 is in transition fit with the connecting hole 15. The coupling hook 241 is fitted to the coupling groove 151.

When a certain blade 1 needs to be removed for disposal, the lower end of the cover member 2 is turned rightward by gripping the upper cover plate 21 and the lower cover plate 23 with hands, and the cover member 2 is separated from the rope groove 13, as shown in fig. 6. The groove 25 leaves the rope pulling hole 11, the rope passing groove 13 is exposed, and a notch is formed on the hole wall of the rope pulling hole 11. A rope passing channel is formed between the rear left side surfaces of the upper cover plate 21 and the lower cover plate 23 and the rope releasing surface 131. The stay cord 4 leaves the stay cord hole 11 from the gap of the wall of the stay cord hole 11, enters the rope passing groove 13, then comes out of the right side surface of the blade 1 from the rope passing channel, and the stay cord 4 is separated from the blade 1. And when the cover plate assembly 2 is released, the cover plate assembly is automatically reset. After the treatment of the blade 1, the pull rope 4 can be connected with the blade 1 by operating in the reverse step.

Claims

1. A detachable shutter structure is characterized in that the structure comprises a shutter (1) and a pull rope (4), the blade (1) is provided with a rope pulling hole (11) and a rope passing groove (13), the rope pulling hole (11) is a long round hole, the connecting line of the centers of two arcs is vertical to the central axis of the blade (1), one end of the rope passing groove (13) is communicated with the arc hole wall of the rope pulling hole (11), the other end of the rope passing groove (13) is communicated with the side surface of the blade (1), the blade (1) is connected with a rotatable cover plate component (2), the cover plate component (2) covers the rope passing groove (13), the hole wall of the rope pulling hole (11) is closed, the pull rope (4) penetrates through the pull rope hole (11), the cover plate assembly (2) leaves the rope passing groove (13), a notch is formed in the hole wall of the pull rope hole (11), and the pull rope (4) is separated from the blade (1).

2. A detachable blind blade structure of a blind according to claim 1, wherein the cover plate assembly (2) includes an upper cover plate (21), a connecting plate (22), and a lower cover plate (23), one side of the upper cover plate (21) is connected to one side of the connecting plate (22), the other side of the upper cover plate (21) is suspended, the other side of the connecting plate (22) is connected to one side of the lower cover plate (23), the other side of the lower cover plate (23) is suspended, the upper surface, the side, and the lower surface of the blade (1) are provided with the cover plate combining groove (12) having the recessed surface and communicating with each other, the cover plate assembly (2) covers the rope groove (13), and the upper cover plate (21), the connecting plate (22), and the lower cover plate (23) are embedded with the cover plate combining groove (12).

3. The detachable shutter curtain blade structure of claim 2, wherein the blade (1) is provided with a connecting member bin (14) and an elastic connecting member (3), the connecting member bin (14) is located at one side of the rope passing groove (13), the connecting member bin (14) is a blind hole, the bottom surface of the hole of the connecting member bin (14) is parallel to the central axis of the blade (1), the opening of the connecting member bin (14) is located at the same side surface where the rope passing groove (13) and the blade (1) are opened, the inner surface of the connecting plate (22) is provided with a convex connecting platform (221), the elastic connecting member (3) is strip-shaped, one end of the elastic connecting member (3) is connected with the bottom of the connecting member bin (14), the other end of the elastic connecting member (3) is connected with the convex surface of the connecting platform (221), the cover plate assembly (2) is embedded with the cover plate combining groove (12), the connecting table (221) is embedded into the connecting piece bin (14).

4. A detachable structure of blind curtain of Venetian blind according to claim 2, wherein said upper cover plate (21) and said lower cover plate (23) are respectively provided with a circular arc-shaped groove (25), said grooves (25) are respectively located at the side of the suspension surface of said upper cover plate (21) and said lower cover plate (23) and the opening is located at the surface of said suspension surface, the circular arc of said groove (25) matches with the circular arc of said pull rope hole (11).

5. The detachable shutter curtain blade structure of claim 2 or 4, wherein the upper cover plate (21) and the lower cover plate (23) are respectively provided with a connecting rotating shaft (24), the connecting rotating shaft (24) is tubular, one end of the connecting rotating shaft (24) is connected with the upper cover plate (21) or the lower cover plate (23), the other end of the connecting rotating shaft (24) is suspended, the connecting rotating shaft (24) is provided with a plurality of uniformly distributed elongated slots, the length direction of each elongated slot is consistent with the axial direction of the connecting rotating shaft (24), each elongated slot penetrates through the suspended end of the connecting rotating shaft (24), the blade (1) is provided with a connecting hole (15) penetrating through the upper surface and the lower surface, and the connecting rotating shaft (24) is in transition fit with the connecting hole (15).

6. A detachable blind blade structure according to claim 5, wherein the wall of the connecting hole (15) is provided with a ring-shaped connecting groove (151) having a recessed surface, the free end of the connecting shaft (24) is provided with a connecting hook (241) having a convex outer side surface, and the connecting hook (241) is engaged with the connecting groove (151).

7. A detachable blind blade structure according to claim 3, wherein the connector housing (14) is a flat hole, the longitudinal section of the connector housing (14) is trapezoidal, the wall of the connector housing (14) close to the rope passing groove (13) is parallel to the rope passing groove (13), the wall of the connector housing (14) far from the rope passing groove (13) is inclined, and the opening of the connector housing (14) is larger than the bottom of the hole.

8. A detachable blind blade structure according to claim 1 or 2 or 3 or 7, wherein the rope passing groove (13) is provided with a rope releasing surface (131), the rope releasing surface (131) is a circular arc surface, one side of the rope releasing surface (131) is smoothly connected with the wall of the rope passing groove (13), and the other side of the rope releasing surface (131) is smoothly connected with the side of the blade (1).

9. A detachable shutter blind structure according to claim 3, characterized in that said elastic connecting member (3) is a flat spring.

10. A detachable shutter construction, according to claim 3, characterized in that said elastic connection (3) is a rubber band.