CN109330336B

CN109330336B - Curtain structure

Info

Publication number: CN109330336B
Application number: CN201811485023.0A
Authority: CN
Inventors: 辛秀
Original assignee: Tongling Huize Technology Information Consulting Co ltd
Current assignee: Tongling Huize Technology Information Consulting Co.,Ltd.
Priority date: 2018-12-06
Filing date: 2018-12-06
Publication date: 2021-07-16
Anticipated expiration: 2038-12-06
Also published as: CN109330336A

Abstract

The invention provides a curtain structure which comprises a cross rod, a front pull rod, a rear pull rod, a top plate, a plurality of groups of rolling pieces and a curtain fabric, wherein the front pull rod and the rear pull rod are respectively arranged at two ends of the cross rod, the top plate is arranged at the top of the cross rod, the plurality of groups of rolling pieces are arranged on the cross rod, the curtain fabric is arranged on the plurality of groups of rolling pieces, magnetic strips are arranged at the side end part of the curtain fabric, and. The curtain rod is driven by the motor to be obliquely arranged, so that the curtain cloth can reciprocate along the curtain rod, and the automatic folding and unfolding of the curtain are further realized.

Description

Curtain structure

Technical Field

The invention relates to the field of household articles, in particular to a curtain structure.

Background

The curtain is an indispensable article in home life, and can play a role in shading light, protecting privacy and decorating. The existing market sale curtain has diversified types, and along with the improvement of science and technology, the market occupation of the electric curtain is gradually increased, and the electric curtain has the advantages of convenience in use, intellectualization and the like. The existing electric curtain mainly drives a rope pulley through a motor, and one end of a curtain fabric is pulled to and fro through a rope group wound on the rope pulley to realize curtain folding and unfolding; another common way is to drive a rubber wheel or a gear to pull one end of the curtain back and forth on a track of the curtain rod by a motor directly to achieve curtain folding and unfolding, but the two driving ways have the following disadvantages: firstly, the winding and installation of the rope group and the rope pulley are complex, and a certain installation space is needed; secondly, the transmission efficiency is reduced and the noise is increased due to the fact that the rope sets are aged to cause winding looseness, and the rope sets are troublesome to maintain after being broken; rubber tyer or gear and track form drive, driving motor rotation time is long, and the noise is great to rubber tyer ageing and gear lubrication need frequent maintenance, and wherein the rubber tyer transmission efficiency is lower, and gear and the rack manufacturing cost on the track are higher, and the power is laid complicacy, consequently, in view of the above-mentioned, provide a (window) curtain structure and solve above-mentioned not enough.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the motor drives the curtain rods to be obliquely arranged, so that the curtain cloth can move to the two sides of the curtain rods along the curtain rods, and the curtain can be folded and unfolded in an electric mode.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the curtain structure comprises a cross bar, a front pull rod, a rear pull rod, a top plate, a plurality of groups of rolling pieces and a curtain fabric, wherein the front pull rod and the rear pull rod are respectively arranged at two ends of the cross bar;

one end of the front pull rod and one end of the rear pull rod are respectively fixed on a wall body and are respectively hinged to two ends of the cross rod through pin shafts, the multiple groups of limiting devices are equally arranged on the top of the top plate, each group of rolling pieces are respectively arranged in the cross rod in a rolling manner, the bottom ends of the rolling pieces extend to penetrate through the bottom of the cross rod, multiple groups of mounting rings are uniformly arranged on the top of the curtain cloth, the curtain cloth is connected to the bottom ends of the rolling pieces through the multiple groups of mounting rings, and the magnetic strips are composed of a plurality of magnets and are installed along the side end parts;

the front pull rod comprises a first nail plate fixed on a wall body through an expansion screw, a motor connected with the first nail plate, and a first connecting rod connected to the output shaft end of the motor and hinged to one end of the cross rod through the pin shaft;

the rear pull rod comprises a second nail plate, a second connecting rod connected to the second nail plate and a third connecting rod, one end of the third connecting rod is connected to the second connecting rod, and the other end of the third connecting rod is hinged to the other end of the cross rod through the pin shaft;

the top of the cross rod is provided with a top groove, the bottom of the top groove is provided with a stepped bottom groove, and the bottom of the cross rod is provided with a sliding opening communicated with the bottom groove;

the rolling part comprises a first roller, a second roller and a second bearing, the second roller and the second bearing are coaxially arranged with the first roller, the second bearing is a rolling ball type bearing, the second bearing is installed on the first roller, the second roller is buckled on one side of the first roller, the second bearing is installed between the first roller and the second roller, clearance structures are arranged between the second bearing and the first roller and between the second bearing and the second roller, the first roller and the second roller are fixed through round-head screws and round-head nuts which are in threaded connection with each other, and a sheath is installed on the second bearing;

the rolling piece is installed in the top groove, the bottom end profiles of the first roller and the second roller are respectively arranged in the bottom groove in a rolling mode, and the sheath penetrates through the sliding opening, extends to the outer side of the cross rod and is connected with the curtain cloth through the installation ring;

the top plate comprises a cover plate and a first bolt installed on the cover plate, a convex plate is arranged on the end face of the cover plate, a plurality of groups of first installation holes are formed in the convex plate, the first installation holes penetrate through the cover plate and the convex plate, the limiting devices are installed in the first installation holes of each group respectively, each limiting device comprises an electromagnet, a bolt adsorbed by the electromagnet, a spring used for resetting the bolt, and a shell used for distributing the electromagnet, the bolt and the spring, the limiting devices are screwed in the first installation holes through threads at the end part of the shell, and the bolt can extend into a top groove;

the first bolt penetrates through and is in threaded connection with the cover plate and the convex plate, and a plurality of groups of second bolts are mounted on the side edge of the cover plate; the cover plate is arranged at the top of the cross rod through the plurality of groups of second bolts, the convex plate is buckled at the top groove opening, and the top end outlines of the first roller and the second roller are respectively arranged on two sides of the convex plate in a rolling mode, so that the first roller and the second roller are guided and positioned.

Preferably, the first nail plate is provided with a first detection shaft in a direction perpendicular to the wall surface, and the end part of the first detection shaft is perpendicular to and rotatably connected with the end part of the motor side through a first bearing, so that the first detection shaft is rotatably connected with the motor; the output shaft end of the motor is a transmission screw rod, the first connecting rod is of a tubular structure, and the end part of the first connecting rod is provided with a nut which is matched and connected with the transmission screw rod, so that the output shaft of the motor can be placed in the first connecting rod, and the transmission screw rod and the nut form a transmission pair; the matching installation length of the motor output shaft and the first connecting rod can be adjusted through rotation of the motor output shaft, so that the connecting end of the cross rod and the first connecting rod can swing in a reciprocating mode.

Preferably, the second nail board is provided with the second axle of visiting perpendicularly to wall direction, the second visit axle tip perpendicular and rotatable with the second connecting rod is connected, the third connecting rod is tubular structure, the scalable installation of second connecting rod in the connecting rod.

Preferably, the first detection shaft and the second detection shaft can stretch along the axis direction of the first detection shaft and the second detection shaft, and the installation distance from the cross rod to the wall body can be adjusted through stretching and contraction adjustment of the first detection shaft and the second detection shaft.

Preferably, first gyro wheel terminal surface is provided with the spindle nose, the spindle nose root is provided with first circular bead, the second gyro wheel is provided with the central siphon, the central siphon root is provided with the second circular bead, the suit of second bearing inner circle in the spindle nose, the central siphon inserts in the spindle nose, and second bearing inner circle clamping in between first circular bead and the second circular bead, the external diameter size of first circular bead and second circular bead all is less than or equal to second bearing inner circle external diameter size, can make second bearing outer ring tip produce clearance structure with the terminal surface of first gyro wheel and second gyro wheel respectively, realize each gyro wheel and the relative rotation between the second bearing outer ring, button head screw and button head nut penetrate respectively spindle nose and central siphon carry out the spiro union.

Preferably, the sheath comprises an upper sheath wrapped on the outer ring of the second bearing and an installation sleeve connected to the end part of the upper sheath and extending towards the outer side of the second bearing, a hanging rod is installed at the end part of the installation sleeve, the installation sleeve is sleeved on the hanging rod, the upper sheath wraps the outer ring of the second bearing incompletely, and therefore the upper sheath and the installation sleeve can be made into a sheet metal part.

Preferably, the edges of two sides of the upper sheath are respectively provided with a plurality of groups of hook plates, the hook plates are perpendicular to the peripheral wall of the upper sheath and clamped on the side end face of the outer ring of the second bearing, and the sheath and the second bearing can be positioned along the axial direction of the sheath and the second bearing through the hook plates.

Preferably, the first bolt and the bolt of the limiting device can respectively extend to the position between the first roller and the second roller and to the outer side of the sheath, the positioning of the rolling piece in the top groove can be realized through the bolt and the first bolt, and the braking of the first roller and the second roller is realized.

Preferably, the peripheral wall of the plug pin is sleeved with an elastic sleeve structure.

The curtain rod is driven by the motor to be obliquely arranged, so that the curtain cloth can reciprocate along the curtain rod, and further the automatic folding and unfolding of the curtain are realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of an overall front view configuration provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of an overall three-dimensional structure provided by an embodiment of the present invention;

FIG. 3 is an exploded view of FIG. 2;

FIG. 4 is a schematic view of the full section A-A of FIG. 1;

FIG. 5 is an enlarged view of the structure of FIG. 2 at V;

FIG. 6 is an enlarged view of the structure at W in FIG. 2;

FIG. 7 is a schematic front view of a cross bar according to an embodiment of the present invention;

FIG. 8 is a schematic view of the full section at B-B of FIG. 7;

FIG. 9 is a schematic perspective view of a top plate according to an embodiment of the present invention;

FIG. 10 is a perspective view of a rolling element provided in an embodiment of the present invention;

FIG. 11 is an exploded view of FIG. 10;

FIG. 12 is a schematic perspective view of a first roller according to an embodiment of the present invention;

in the figure: 100. the sliding type curtain rail comprises a cross bar, 101, a top groove, 102, a bottom groove, 103, a sliding opening, 200, a front pull rod, 210, a first nail plate, 211, a first probe shaft, 220, a first bearing, 230, a motor, 240, a first connecting rod, 300, a rear pull rod, 310, a second nail plate, 311, a second probe shaft, 320, a second connecting rod, 330, a third connecting rod, 400, a top plate, 410, a cover plate, 411, a boss plate, 412, a first mounting hole, 420, a first bolt, 430, a second bolt, 500, a limiting device, 600, a curtain cloth 601, a sheath, 700, a magnetic strip, 800, a rolling element, 810, a first roller, 811, a shaft head, 812, a first shoulder, 820, a second roller, 821, a shaft tube, 822, a second shoulder, 830, a second bearing, 840, a sheath, 841, 842, a mounting sleeve, 843, a hook plate, 844, a hanging rod, 850, a round head nut, 900 and a round pin shaft pin.

Detailed Description

The above-described scheme is further illustrated below with reference to specific examples. It is to be understood that these examples are for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.

Fig. 1 to 12 show a general front view structure diagram provided by an embodiment of the present invention, fig. 2 shows a general three-dimensional structure diagram provided by an embodiment of the present invention, fig. 3 shows an exploded structure diagram of fig. 2, fig. 4 shows a full-section structure diagram at a-a of fig. 1, fig. 5 shows an enlarged structure diagram at V of fig. 2, fig. 6 shows an enlarged structure diagram at W of fig. 2, fig. 7 shows a front view structure diagram of a cross bar provided by an embodiment of the present invention, fig. 8 shows a full-section structure diagram at B-B of fig. 7, fig. 9 shows a top plate three-dimensional structure diagram provided by an embodiment of the present invention, fig. 10 shows a three-dimensional structure diagram of a rolling element provided by an embodiment of the present invention, fig. 11 shows an exploded structure diagram of fig. 10, and fig. 12 shows a three-dimensional structure diagram of a first roller provided by an embodiment of the present invention.

In a specific embodiment, a curtain structure is provided, which includes a cross bar 100, a front pull rod 200 and a rear pull rod 300 respectively installed at two ends of the cross bar 100, a top plate 400 installed at the top of the cross bar 100, a plurality of sets of rolling members 800 installed at the cross bar 100, and a curtain cloth 600 installed at the plurality of sets of rolling members 800, wherein a magnetic strip 700 is installed at a side end of the curtain cloth 600, and a plurality of sets of position-limiting devices 500 are installed at the top plate 400.

One end of the front pull rod 200 and one end of the rear pull rod 300 are respectively fixed to a wall body and are respectively hinged to two ends of the cross rod 100 through a pin shaft 900, the plurality of groups of limiting devices 500 are equally installed on the top of the top plate 400, each group of rolling members 800 are respectively installed in the cross rod 100 in a rolling manner, the bottom ends of the rolling members extend to penetrate the bottom of the cross rod 100, the plurality of groups of installation rings 601 are evenly arranged on the top of the curtain fabric 600, the curtain fabric 600 is connected to the bottom ends of the rolling members 800 through the plurality of groups of installation rings 601, and the magnetic strips 700 are formed by a plurality of magnets and are installed along.

The front rod 200 includes a first nail plate 210 fixed to a wall body by an expansion screw, a motor 230 connected to the first nail plate 210, and a first connecting rod 240 connected to an output shaft end of the motor 230 and hinged to one end of the cross bar 100 by the pin 900.

Preferably, the first nail plate 210 is provided with a first probe shaft 211 perpendicular to the wall surface, and an end of the first probe shaft 211 is perpendicular to and rotatably connected to an end of the motor 230 through a first bearing 220, so as to rotatably connect the first probe shaft 211 and the motor 230; the output shaft end of the motor 230 is a transmission screw, the first connecting rod 240 is a tubular structure, and the end part of the first connecting rod is provided with a nut which is matched and connected with the transmission screw, so that the output shaft of the motor 230 can be placed in the first connecting rod 240, and the transmission screw and the nut form a transmission pair. The length of the motor 230 can be adjusted by rotating the output shaft thereof, so that the cross bar 100 can swing back and forth at the connection end with the first connecting rod 240.

The rear link 300 includes a second nail plate 310, a second connecting rod 320 connected to the second nail plate 310, and a third link 330 having one end connected to the second connecting rod 320 and the other end hinged to the other end of the cross bar 100 by the pin 900.

Preferably, the second nail plate 310 is provided with a second probe shaft 311 perpendicular to the wall surface, the end of the second probe shaft 311 is perpendicular to and rotatably connected with the second connecting rod 320, the third connecting rod 330 is a tubular structure, and the second connecting rod 320 is telescopically mounted in the connecting rod 330.

Preferably, the first probe shaft 211 and the second probe shaft 311 can both extend and retract along the axial direction thereof, and the installation distance from the cross bar 100 to the wall body can be adjusted by extending and retracting the first probe shaft 211 and the second probe shaft 311, so that the installation convenience is improved.

The top of the cross rod 100 is provided with a top groove 101, the bottom of the top groove 101 is provided with a stepped bottom groove 102, and the bottom of the cross rod 100 is provided with a sliding opening 103 communicated with the bottom groove 102;

the rolling member 800 includes a first roller 810, and a second roller 820 and a second bearing 830 coaxially disposed with the first roller 810, the second bearing 830 is a rolling ball bearing, the second bearing 830 is mounted on the first roller 810, the second roller 820 is fastened to one side of the first roller 810, the second bearing 830 is mounted between the first roller 810 and the second roller 820, a gap structure is disposed between the second bearing 830 and the first roller 810 and the second roller 820, the first roller 810 and the second roller 820 are fixed by a round head screw 850 and a round head nut 860 screwed to each other, and a sheath 840 is mounted on the second bearing 830;

the rolling member 800 is installed in the top groove 101, the bottom end profiles of the first roller 810 and the second roller 820 are respectively and rollably installed in the bottom groove 102, and the covering 840 passes through the sliding opening 103 and extends to the outside of the cross bar 100 and is connected with the curtain cloth 600 through the installation ring 601.

Preferably, a shaft head 811 is disposed on an end surface of the first roller 810, a first shoulder 812 is disposed on a root portion of the shaft head 812, a shaft tube 821 is disposed on the second roller 820, a second shoulder 822 is disposed on a root portion of the shaft tube 821, an inner ring of the second bearing 830 is sleeved on the shaft head 812, the shaft tube 822 is inserted into the shaft head 812, an inner ring of the second bearing 830 is clamped between the first shoulder 812 and the second shoulder 822, outer diameters of the first shoulder 812 and the second shoulder 822 are smaller than or equal to an outer diameter of an inner ring of the second bearing 830, a gap structure is formed between an end portion of an outer ring of the second bearing 830 and an end surface of the first roller 810 and an end surface of the second roller 820, relative rotation between each roller and an outer ring of the second bearing 830 is achieved, and the round head screw 850 and the round head nut 860 penetrate through the shaft head 812 and the.

Preferably, the sheath 840 comprises an upper sheath 841 wrapping the outer ring of the second bearing 830 and a mounting sleeve 842 connected to the end of the upper sheath 841 and extending to the outer side of the second bearing 830, a hanging rod 844 is mounted at the end of the mounting sleeve 842, the mounting ring 601 is sleeved on the hanging rod 844, the outer ring of the second bearing 830 is incompletely wrapped by the upper sheath 841, and therefore the upper sheath 841 and the mounting sleeve 842 can be made into an integral sheet metal part, so that the production and the processing are facilitated, and the sheath 840 can be conveniently mounted and dismounted.

Preferably, a plurality of groups of hook plates 843 are respectively arranged at two side edges of the upper sheath 841, the hook plates 843 are perpendicular to the peripheral wall of the upper sheath 841 and clamped on the side end surface of the outer ring of the second bearing 830, and the sheath 840 and the second bearing 830 can be positioned along the axial direction thereof by the hook plates 843.

The top plate 400 comprises a cover plate 410 and a first bolt 420 installed on the cover plate 410, a convex plate 411 is arranged on the end face of the cover plate 410, multiple groups of first installation holes 412 are formed in the convex plate 411, the first installation holes 412 penetrate through the cover plate 410 and the convex plate 411, the limiting device 500 is installed in each group of the first installation holes 412 respectively, the limiting device 500 comprises an electromagnet, a bolt adsorbed by the electromagnet, a spring used for resetting the bolt, and a shell used for distributing the electromagnet, the bolt and the spring, the limiting device 500 is screwed in the first installation holes 412 through threads at the end of the shell, and the bolt can extend into the top groove 101.

The first bolt 420 is threaded through the cover plate 410 and the convex plate 411, and a plurality of groups of second bolts 430 are mounted on the side edge of the cover plate 410; the cover plate 410 is mounted on the top of the cross bar 100 through the plurality of sets of second bolts 430, the convex plate 411 is fastened at the notch of the top groove 101, and the top end profiles of the first roller 810 and the second roller 820 are respectively arranged on two sides of the convex plate 411 in a rolling manner, so that the first roller 810 and the second roller 820 are guided and positioned.

Preferably, the first bolt 420 and the latch of the limiting device 500 can extend between the first roller 810 and the second roller 820 and outside the sheath 840 respectively, and the positioning of the rolling member 800 in the top groove 101 and the braking of the first roller 810 and the second roller 820 can be realized through the latch and the first bolt 420.

Preferably, the peripheral wall of the plug is sleeved with an elastic sleeve structure, so that the impact strength between the plug and the sleeve 840 can be reduced, and the effects of buffering and noise reduction are achieved.

The specific installation and adjustment process comprises the steps that 1, the two ends of the cross rod 100 are installed on a wall body through the front pull rod 200 and the rear pull rod 300 respectively, the distance from the cross rod 100 to the wall body can be changed by adjusting the telescopic length of the first detection shaft 211 and the telescopic length of the second detection shaft 311 respectively, and the curtain installation device has the advantages that the installation convenience and the installation efficiency of a curtain are improved, the installation angle of the curtain is convenient to adjust, and the curtain installation device is more suitable for being installed on the wall body with the wall surface having the fall.

2. The initial connection length between the output shaft end of the motor 230 and the first connecting rod 240 is adjusted, which is advantageous in that the swing range of the end of the rail 100 when the motor 230 rotates in the forward and reverse directions is facilitated, and the curtain fabric 600 can slide smoothly in a reciprocating manner along the rail 100; the connection length of the second connection rod 320 and the third connection rod 330 is determined, which has an advantage in that the installation height of the curtain fabric 600 can be adjusted;

3. the first group of rolling members 800 near the end of the rear pull rod 300 are fixed by the first bolt 420, and the first bolt 420 may also be disposed between the first group of rolling members 800 disposed adjacent to each other, so as to fix one end of the curtain fabric 600 and prevent the curtain fabric 600 from sliding integrally.

In the specific using process, the curtain is unfolded: by clockwise rotation of the motor 230, the total length of the connection between the output shaft end of the motor 230 and the first connecting rod 240 is increased, the cross bar 100 is positioned at the end of the front pull rod 200 and swings downwards, the multiple groups of rolling members 800 roll along the top groove 101 in the direction of the front pull rod 200, and the rolling members 800 pull the free end of the curtain cloth 600 in the direction of the front pull rod 200, so that the curtain is unfolded.

Curtain folding: by rotating the motor 230 counterclockwise, the total length of the connection between the output shaft end of the motor 230 and the first connecting rod 240 is reduced, the end of the cross bar 100 located at the front pull rod 200 swings upward, the multiple sets of rolling members 800 roll along the top groove 101 in the direction of the rear pull rod 300, and the rolling members 800 pull the free end of the curtain fabric 600 in the direction of the rear pull rod 300, so as to fold the curtain.

Adjusting the folding and unfolding range of the curtain: the adjustable curtain folding and unfolding device can be adjusted by a plurality of groups of limiting devices 500 arranged on the top plate 100, each group of limiting devices 500 can independently start and stop, and when the adjustable curtain folding and unfolding device is started, the bolt in the limiting devices 500 is popped up, so that the first group of rolling pieces 800 moving towards the direction of the front pull rod 200 can be limited, and the curtain folding and unfolding range can be limited.

The magnetic strips 700 are electrified to generate magnetism after the curtain cloth is unfolded, the end parts of the curtain cloth 600 can be fixed on the metal strips of the wall body or two groups of oppositely arranged curtain cloth 600 can be mutually adsorbed and connected, so that the curtain cloth 600 is closed, the magnetic strips 700 are powered off when the curtain is folded, and the free end parts of the curtain cloth 600 or the two groups of oppositely arranged curtain cloth 600 are separated.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A curtain structure comprises a cross bar, a front pull rod and a rear pull rod which are respectively arranged at two ends of the cross bar, a top plate arranged at the top of the cross bar, a plurality of groups of rolling pieces arranged on the cross bar and a curtain cloth arranged on the plurality of groups of rolling pieces, wherein the side end part of the curtain cloth is provided with a magnetic strip, the top plate is provided with a plurality of groups of limiting devices, the curtain structure is characterized in that,

the first bolt penetrates through and is in threaded connection with the cover plate and the convex plate, and a plurality of groups of second bolts are mounted on the side edge of the cover plate; the cover plate is arranged at the top of the cross rod through the plurality of groups of second bolts, the convex plate is buckled at the notch of the top groove, and the top end outlines of the first roller and the second roller are respectively arranged on two sides of the convex plate in a rolling manner, so that the first roller and the second roller are guided and positioned;

the bolt of the first bolt and the bolt of the limiting device can respectively extend to the position between the first roller and the second roller and extend to the outer side of the sheath, the positioning of the rolling piece in the top groove can be realized through the bolt and the first bolt, and the braking of the first roller and the second roller is realized.

2. The window curtain structure as claimed in claim 1, wherein the first nail plate is provided with a first probe shaft perpendicular to the wall surface, and an end of the first probe shaft is perpendicular to and rotatably connected to the side end of the motor through a first bearing, so that the first probe shaft and the motor are rotatably connected; the output shaft end of the motor is a transmission screw rod, the first connecting rod is of a tubular structure, and the end part of the first connecting rod is provided with a nut which is matched and connected with the transmission screw rod, so that the output shaft of the motor can be placed in the first connecting rod, and the transmission screw rod and the nut form a transmission pair; the length of the motor output shaft matched with the first connecting rod can be adjusted through rotation of the motor output shaft, so that the connecting end of the cross rod and the first connecting rod can swing in a reciprocating manner;

the second nail board perpendicular to wall direction is provided with the second and surveys the axle, the second is visited the axle tip perpendicularly and rotatable with the second connecting rod is connected, the third connecting rod is the tubular structure, the scalable installation of second connecting rod in the connecting rod.

3. The window covering structure as claimed in claim 2, wherein the first and second probe shafts are both extendable and retractable along the axial direction thereof, and the installation distance of the cross bar to the wall body can be adjusted by the extension and retraction of the first and second probe shafts.

4. The window covering structure as claimed in claim 1, wherein the first roller has a shaft head on its end surface, the first shoulder on its root, the second roller has a shaft tube on its root, the second shoulder is on its root, the inner ring of the second bearing is sleeved on the shaft head, the shaft tube is inserted into the shaft head, and the inner ring of the second bearing is clamped between the first shoulder and the second shoulder, the outer diameters of the first shoulder and the second shoulder are smaller than or equal to the outer diameter of the inner ring of the second bearing, so that the end of the outer ring of the second bearing and the end of the first roller and the second roller respectively form a gap structure, thereby realizing the relative rotation between the rollers and the outer ring of the second bearing, and the round head screw and the round head nut respectively penetrate into the shaft head and the shaft tube for screw connection.

5. The curtain structure as claimed in claim 1, wherein the sheath includes an upper sheath wrapped around the outer ring of the second bearing and a mounting sleeve connected to an end of the upper sheath and extending outward of the second bearing, the mounting sleeve is mounted at an end of the mounting sleeve and sleeved on the hanging rod, the upper sheath does not wrap the outer ring of the second bearing completely, and thus the upper sheath and the mounting sleeve can be integrated into a sheet metal part.

6. The window curtain structure as claimed in claim 5, wherein a plurality of sets of hook plates are respectively disposed at two side edges of the upper covering, the hook plates are perpendicular to the peripheral wall of the upper covering and are clamped on the side end surface of the outer ring of the second bearing, and the positioning of the covering and the second bearing along the axial direction of the covering and the second bearing can be realized through the hook plates.

7. A blind construction as claimed in claim 1, wherein the peripheral wall of said plug is provided with a resilient sleeve arrangement.