Curtain and punching-free mounting device for upper beam of curtain

Abstract

The embodiment of the utility model provides a curtain and an upper beam punching-free mounting device thereof. The device comprises a mounting seat, wherein one end of the mounting seat is fixed at the end part of an upper beam of the curtain; the axial direction of the screw rod is parallel to the length direction of the upper beam, the screw rod can be axially and movably assembled on the mounting seat, and a rotation stopping structure is arranged between the screw rod and the mounting seat; the abutting plate is assembled at the end, away from the upper beam, of the screw and used for abutting against and positioning a wall on one side of the window body. The adjusting mechanism is assembled on the mounting seat and used for driving the screw rod to axially move, the adjusting mechanism comprises a worm pivoted on the mounting seat, pivoting shafts correspondingly pivoted with the mounting seat are formed at the two opposite ends of the worm, and a driving part used for driving the worm to rotate is arranged at the tail end of at least one pivoting shaft; the worm gear is pivoted on the mounting seat and meshed with the worm, a screw hole coaxial with the worm gear is formed in the center of the worm gear, and the worm gear is screwed with the screw rod through the screw hole to drive the screw rod to stretch out and draw back relative to the mounting seat. The embodiment is simple in structure and convenient to use.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of curtain accessories, and in particular to a curtain and an upper beam punch-free installation device thereof. Background Art

[0002] The curtain upper beam punch-free installation device has gradually become popular because of its convenience in quickly realizing the installation and positioning operation of the curtain upper beam without punching holes.

[0003] An existing curtain upper beam punch-free installation device mainly comprises: a mounting seat with one end fixed to the end of the upper beam and having a cavity inside, a linkage member with a worm wheel part and a screw rod part at both ends respectively and one end of the worm wheel part extending into the cavity of the mounting seat, a worm assembled in the mounting seat and meshing with the worm wheel part of the linkage member to drive the linkage member to rotate, an adjustment top block with one end extending into the mounting seat, a lock member screwed on the screw rod part of the linkage member to limit the axial movement stroke of the adjustment top block toward the inside of the mounting seat, and an elastic member with two ends respectively abutting against the driving member and the adjustment top block, and the adjustment top block is pushed outward and pressed against the wall by the elastic member. One end of the worm is exposed from the mounting seat to facilitate the operation of the worm. When used specifically for assembling the upper beam, one end of the mounting seat of the device is fixed to the end of the upper beam, and then the adjusting top block is pushed inward to move it slightly inward so that the upper beam can be installed in the window frame. Under the action of the elastic member, the adjusting top block is pressed against the mounting wall surfaces on both sides of the window frame to achieve pre-installation, and then the worker drives the worm to drive the linkage member to rotate, so that the locking member moves axially toward the adjusting top block to press against the adjusting top block to prevent the adjusting top block from elastically shrinking, thereby realizing punch-free installation and being compatible with window frames of different widths within a small range.

[0004] However, the inventors found during the specific implementation that the punch-free installation device has a relatively complex structure, relatively more parts, and is relatively troublesome to manufacture; in addition, the adjustable top block is extended out and pressed against the wall by the pushing action of the elastic member and then locked in position by the locking member. When it is to be disassembled, after the locking member is adjusted to the unlocked position, it is relatively difficult to overcome the elastic force of the elastic member to push the adjustable top block to retract. Utility Model Content

[0005] The technical problem to be solved by the embodiments of the utility model is to provide a curtain upper beam punch-free installation device with a simple structure and easy operation.

[0006] The technical problem to be solved by the embodiments of the utility model is to provide a curtain with a simple installation structure and easy operation.

[0007] In order to solve the above technical problems, the embodiment of the utility model provides the following technical solutions: a curtain upper beam punch-free installation device, comprising:

[0008] A mounting base fixed at one end to the end of the upper beam of the curtain;

[0009] A screw rod whose axis is arranged parallel to the length direction of the upper beam and is axially movably assembled on the mounting base. A rotation prevention structure is provided between the screw rod and the mounting base to prevent the screw rod from rotating circumferentially;

[0010] A pressing plate assembled at the end of the screw rod away from the upper beam and used to press and position against the wall on one side of the window frame; and

[0011] An adjusting mechanism assembled on the mounting base for driving the axial movement of the screw rod. The adjusting mechanism includes:

[0012] A worm pivotally mounted on the mounting base. Opposite ends of the worm form pivot shafts corresponding to pivotally connect with the mounting base. At least one end of the pivot shaft is provided with a driving portion for driving the rotation of the worm; and

[0013] A worm gear pivotally mounted on the mounting base and meshing with the worm. A threaded hole coaxial with the worm gear is provided at the center of the worm gear. The worm gear drives the screw rod to expand and contract relative to the mounting base by screwing the threaded hole with the screw rod.

[0014] Further, the driving portion is a driving hole with a non-circular cross-section formed by correspondingly recessing from the end face of the end of the pivot shaft, or a driving rod coaxially arranged with the pivot shaft at the end of the pivot shaft and having a non-circular cross-section.

[0015] Further, the mounting base is a box body with an accommodation cavity inside. One end of the box body protrudes to form a plug-in portion for corresponding plug-in positioning with the end of the upper beam, and a through hole is provided in the middle of the end wall of the other end. The adjusting mechanism is assembled in the accommodation cavity of the box body. One end of the screw rod extends out of the box body through the through hole, and a through hole for the driving portion to be exposed is also provided on the side surface of the box body.

[0016] Further, the box body is composed of a box main body with the accommodation cavity formed inside and having an opening at one end, and a cover plate detachably assembled at the opening to cover the opening.

[0017] Further, the through hole is provided in the middle of the cover plate. A pressing convex column is formed on the inner side surface of the cover plate and protrudes towards the inside of the box body around the through hole. A positioning ring is formed in the middle of the side wall of the box main body facing the cover plate. Opposite ends of the worm gear are axially positioned by the pressing convex column on the cover plate and the positioning ring respectively.

[0018] Further, the inner hole of the positioning ring also correspondingly penetrates through the box wall of the box main body.

[0019] Furthermore, the anti-rotation structure includes a positioning cam arranged on the hole wall of the through hole and extending in the axial direction, and a positioning keyway arranged on the outer side surface of the screw and extending in the axial direction, and the positioning cam is correspondingly inserted into the positioning keyway.

[0020] Furthermore, a side wall of the accommodating cavity and an inner side surface of the cover plate respectively correspond to each of the pivot shaft protrusions to form an axle seat, and the opposite sides of the two axle seats are respectively recessed to form a positioning half-groove. When the cover plate is fixed to the box body, the positioning half-grooves of the two axle seats are combined to form a pivot hole for the pivot shaft to be pivoted. The through hole is opened on the side wall of the accommodating cavity where the axle seat is formed and faces the pivot hole; the outer wall of the middle section of the pivot shaft is correspondingly recessed to form a positioning ring groove, and a positioning convex ring is correspondingly protruded on the wall of the pivot hole. When the pivot shaft is assembled to the pivot hole, the positioning ring groove and the positioning convex ring are correspondingly engaged to position the pivot shaft in the axial direction.

[0021] Furthermore, the pressure plate protrudes toward the middle of one side of the screw to form a pivot seat and an anti-slip pad is provided on the other side. The two opposite side surfaces of the pivot seat each protrude to form a pivot convex portion. Two pivot convex pieces protrude alternately from the corresponding end surfaces of the screw, and a pivot recess is also provided in each pivot convex piece. The screw is pivotally connected to the pivot seat with the two pivot convex pieces respectively located on the opposite sides of the pivot seat and the pivot recess and the pivot convex portion cooperate with each other.

[0022] On the other hand, in order to solve the above-mentioned further technical problems, the embodiment of the utility model provides the following technical solutions: a curtain, comprising an upper beam and an upper beam punching-free installation device assembled on at least one end of the upper beam, wherein the upper beam punching-free installation device is a curtain upper beam punching-free installation device as described in any one of the above items.

[0023] After adopting the above technical scheme, the embodiment of the utility model has at least the following beneficial effects: the embodiment of the utility model adopts the meshing of a worm and a worm wheel to form an adjusting mechanism, and the worm wheel is then threadedly connected to a screw with a pressure plate at one end through a screw hole opened at the wheel center, so that by operating the driving part arranged at the end of the pivot shaft of the worm and exposed from the upper beam, the screw can be driven to rotate and move axially to extend outward relative to the end surface of the upper beam, and then the pressure plate assembled at the end of the screw extending from the upper beam is pressed against the corresponding wall to fix the upper beam, and when the upper beam needs to be disassembled, it is only necessary to operate the driving part in the reverse direction to make the screw retract and move in the reverse direction, and the pressure plate is also separated from the wall, so that the upper beam can be removed. The punch-free installation device for the upper beam provided by the utility model has a simple overall structure and does not require a resisting force provided by an elastic member. In actual application, the operation of disassembling and assembling the upper beam is very convenient. Moreover, through reasonable design, the helix angle of the worm is smaller than the friction angle between the worm wheel and the worm, so that the worm and the worm wheel have self-locking properties during transmission, thereby preventing the screw from being easily affected by external forces and extending and retracting in the axial direction by itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The utility model is a schematic diagram of an optional embodiment of the punch-free installation device for the upper beam of a curtain and the split structure of the upper beam.

[0025] Figure 2 The utility model is a schematic diagram of an optional embodiment of the curtain upper beam punch-free installation device and the assembly structure of the upper beam.

[0026] Figure 3 The utility model is a schematic diagram of an optional embodiment of the punch-free installation device for the upper beam of a curtain and the cross-sectional structure of the upper beam.

[0027] Figure 4 The present invention is a schematic cross-sectional structure diagram of an optional embodiment of the curtain upper beam punch-free installation device of the present invention along a plane perpendicular to the axial direction of the screw rod.

[0028] Figure 5 The present invention is a schematic cross-sectional structure diagram of an optional embodiment of the curtain upper beam punch-free installation device of the utility model along the plane where the worm shaft is located.

[0029] Figure 6 This is a structural schematic diagram of the box body of an optional embodiment of the curtain upper beam punch-free installation device of the utility model.

[0030] Figure 7 The utility model is a schematic diagram of the split structure of the screw rod and the pressure plate of an optional embodiment of the curtain upper beam punch-free installation device. DETAILED DESCRIPTION

[0031] The present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present utility model and are not intended to limit the present utility model. Moreover, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0032] As Figures 1-5 shown, an optional embodiment of the present utility model provides a device A for installing a curtain upper beam without punching holes, including:

[0033] A mounting seat 1 fixedly connected to one end of the upper beam B of the curtain;

[0034] A screw rod 3 axially parallel to the length direction of the upper beam B and axially movably assembled on the mounting seat 1. A rotation prevention structure 4 is provided between the screw rod 3 and the mounting seat 1 to prevent the screw rod 3 from rotating circumferentially;

[0035] A pressing plate 5 assembled at the end of the screw rod 3 away from the upper beam B and used for tightly abutting and positioning against the wall on one side of the window; and

[0036] An adjusting mechanism 7 assembled on the mounting seat 1 for driving the axial movement of the screw rod 3. The adjusting mechanism 7 includes:

[0037] A worm 70 pivotally arranged on the mounting seat 1. The opposite ends of the worm 70 are formed with pivot shafts 701 pivotally connected to the mounting seat 1 correspondingly. At least one end of the pivot shaft 701 is provided with a driving part 703 for driving the worm 70 to rotate; and

[0038] A worm gear 72 pivotally arranged on the mounting seat 1 and meshing with the worm 70. A threaded hole 721 coaxial with the worm gear 72 is formed at the center of the worm gear. The worm gear 72 drives the screw rod 3 to expand and contract relative to the mounting seat 1 by screwing the threaded hole 721 with the screw rod 3.

[0039] In the embodiment of the present utility model, an adjustment mechanism is constituted by the engagement of a worm 70 and a worm wheel 72. The worm wheel 72 is then threadedly connected to a screw rod 3 having a pressing plate 5 provided at one end through a threaded hole 721 opened at the center of the wheel. Thus, by operating a driving portion 703 provided at the end of the pivot shaft 701 of the worm 70 and exposed from the upper beam B, the screw rod 3 can be driven to rotate and axially move so as to extend outward relative to the end face of the upper beam B. Furthermore, the upper beam B can be fixed by the pressing plate 5 assembled at one end of the screw rod 3 extending out of the upper beam B pressing against the corresponding wall. When it is necessary to disassemble the upper beam B, only the driving portion 703 needs to be operated in the reverse direction, and the screw rod 3 can be retracted in the reverse direction. The pressing plate 5 will also be separated from the wall, and the upper beam B can be removed. The overall structure of the upper beam B installation device without drilling holes provided by the present utility model is simple, and there is no need for an elastic member to provide a pressing force. In actual application, the operations of disassembling and assembling the upper beam B are very convenient; moreover, through reasonable design, the helix angle of the worm 70 is made smaller than the friction angle between the worm wheel 72 and the worm 70, so that the worm 70 and the worm wheel 72 have self-locking properties during transmission, thereby preventing the screw rod 3 from easily extending and retracting axially under external force.

[0040] In specific implementation, pivot shafts 701 can be provided at both ends of the worm 70, and corresponding driving portions 703 can be provided. Thus, the driving portions 703 can be exposed on both sides of the mounting seat 1. During specific assembly, the device does not need to distinguish between the front and the back, improving the assembly efficiency.

[0041] In an alternative embodiment of the present utility model, as Figures 1-2 shown, the driving portion 703 is a driving hole with a non-circular cross-section formed by corresponding depression at the end face of the pivot shaft 701 or a driving rod coaxially provided with the pivot shaft 701 at the end of the pivot shaft 701 and having a non-circular cross-section. In this embodiment, in order to facilitate driving the rotation of the worm 70, various implementation manners of the driving portion 703 are designed. In the embodiment as Figures 1-4 shown, the driving portion 703 is an internal hexagonal hole for inserting a hexagonal wrench. Of course, it can also be an internal triangular hole, an internal pentagonal hole, etc.; when a driving rod is used as the driving portion 703, the cross-section of the driving rod can be in the shape of a triangle, a rectangle, a hexagon, an ellipse, etc.

[0042] In an alternative embodiment of the present utility model, as Figures 1 to 6As shown, the mounting base 1 is a box body with an accommodation cavity 10 inside. One end of the box body 1 protrudes to form a plug-in portion 12 for corresponding plug-in positioning with the end of the upper beam B, and a through hole 13 is formed in the middle of the end wall at the other end. The adjusting mechanism 7 is assembled in the accommodation cavity 10 of the box body 1. One end of the screw 3 extends out of the box body 1 through the through hole 13, and a through hole 14 for the driving part 701 to be exposed is also provided on the side of the box body 1 (it can be understood that the through holes 14 are provided in one-to-one correspondence with the driving parts 701). In this embodiment, the mounting base 1 adopts a box body with an accommodation cavity 10 inside, which can effectively protect the cooperating parts of the adjusting mechanism 7 and the screw 3 located inside it, and prevent foreign objects from falling between the cooperating parts of the relatively movable components and affecting the smoothness of transmission.

[0043] In an alternative embodiment of the present invention, as Figures 1 to 6 shown, the box body 1 is composed of a box main body 15 with the accommodation cavity 10 formed inside and an opening 151 at one end, and a cover plate 16 detachably assembled to the opening 151 to cover the opening 151. In this embodiment, the box body 1 is formed by combining the box main body 15 and the cover plate 16, which is convenient for loading the adjusting mechanism 7 into the accommodation cavity 10 through the opening 151, and the cover plate 16 covers the opening 151 to improve the protection performance.

[0044] In an alternative embodiment of the present invention, as Figure 1 、 Figure 3 and Figure 6 shown, the through hole 13 is provided in the middle of the cover plate 16. An abutting convex column 161 is formed on the inner side surface of the cover plate 16 and protrudes towards the inside of the box body 1 around the through hole 13. A positioning ring 153 is formed in the middle of the box wall on the side of the box main body 15 facing the cover plate 16. The two opposite ends of the worm wheel 72 are respectively abutted and axially positioned by the abutting convex column 161 on the cover plate 16 and the positioning ring 153. In this embodiment, by using the abutting convex column 161 of the cover plate 16 and the positioning ring 153 formed in the middle of the box wall of the box main body 15 to abut and position from the two opposite ends of the worm wheel 72, the installation and positioning of the worm wheel 72 can be effectively realized, and the structure is simple and the assembly is convenient.

[0045] In an alternative embodiment of the present invention, as Figure 1 、 Figure 3 and Figure 6As shown, the inner hole 153a of the positioning ring 153 also correspondingly penetrates through the box wall of the box body 15. In this embodiment, the inner hole of the positioning ring 153 also correspondingly penetrates through the box wall of the box body 15, so that the end of the screw 3 away from the pressing plate 5 can extend into the upper beam B through the inner hole 153 of the positioning ring 153, and the inner space of the upper beam B is used to accommodate the screw 3. It can be understood that since the axial movement stroke of the screw 3 is not too large, the distance between the worm wheel 72 and the corresponding side box wall of the box body 15 can also be reasonably designed, and the distance between the worm wheel 72 and the box wall can also be used to provide the movement space for the screw 3.

[0046] In an alternative embodiment of the present invention, as Figure 1 , Figure 3 and Figure 7 shown, the anti-rotation structure 4 includes a positioning convex key 40 provided on the hole wall of the through hole 13 and extending axially, and a positioning key groove 42 provided on the outer side surface of the screw 3 and extending axially. The positioning convex key 40 is correspondingly inserted into the positioning key groove 42. In this embodiment, the positioning convex key 40 on the hole wall of the through hole 13 and the positioning key groove 42 on the outer side surface of the screw 3 are inserted and matched with each other, which can effectively limit the screw 3 in the circumferential direction, and the structure is simple.

[0047] In an alternative embodiment of the present invention, as Figure 1 , Figures 4-6As shown, on one side wall of the accommodation cavity 10 and on the inner side surface of the cover plate 16, there are respectively formed seat members 101 protruding corresponding to each pivot shaft 701. On the opposite side surfaces of the two seat members 101, positioning semi-grooves 103 are respectively recessed. When the cover plate 16 is fixed to the box body 15, the positioning semi-grooves 103 of the two seat members 101 enclose a pivot hole 105 for the pivot shaft 701 to be pivotally installed. The through hole 14 is opened on the side wall of the accommodation cavity 10 where the seat member 101 is formed and is opposite to the pivot hole 105; on the outer side wall of the middle section of the pivot shaft 701, a positioning ring groove 701a is correspondingly recessed, and on the hole wall of the pivot hole 105, a positioning convex ring 105a protrudes correspondingly. When the pivot shaft 701 is assembled into the pivot hole 105, the pivot shaft 701 is axially positioned by the corresponding engagement of the positioning ring groove 701a and the positioning convex ring 105a. In this embodiment, by respectively forming seat members 101 protruding corresponding to each pivot shaft 701 on one side wall of the accommodation cavity 10 and on the inner side surface of the cover plate 16, during specific assembly, one side surface of each pivot shaft 701 of the worm 70 can be first installed on the positioning semi-groove 103 of the seat member 101 on the inner wall of the accommodation cavity 10, and then the cover plate 16 is buckled, so that the positioning semi-groove 103 of the seat member 101 of the cover plate 16 positions the other side surface of the pivot shaft 701, and thus the installation of the worm 70 can be completed. The assembly is very convenient, and the worm 70 can be positioned by using the cover plate 16; moreover, by the mutual engagement of the positioning ring groove 701a of the pivot shaft 701 and the positioning convex ring 105a of the pivot hole 105, the pivot shaft 701 can be axially positioned, preventing the pivot shaft 701 from moving axially and achieving stable positioning.

[0048] In an alternative embodiment of the present utility model, as Figure 3 and Figure 7 shown, on the middle part of the side surface of the pressing plate 5 facing the screw rod 3, a pivot seat 50 protrudes correspondingly, and an anti-slip gasket 52 is provided on the opposite side surface. On the opposite side surfaces of the pivot seat 50, pivot convex parts 501 protrude respectively. At the end surface of one end of the screw rod 3 extending out of the upper beam B, two pivot convex pieces 30 protrude at intervals. Each pivot convex piece 501 is also provided with a pivot concave part 301. The screw rod 3 is pivotally installed on the pivot seat 50 with the two pivot convex pieces 30 respectively located on the opposite sides of the pivot seat 50 and the pivot concave part 301 corresponding to and cooperating with the pivot convex part 501. In this embodiment, by the mutual pivot connection and cooperation of the pivot concave part 301 on the pivot convex piece 30 of the screw rod 3 and the pivot convex part 501 on the pivot convex part 501 of the pressing plate 5, the pivot connection between the screw rod 3 and the pressing plate 5 is realized. Thus, during specific installation, the pressing plate 5 can be slightly rotated so that the pressing surface of the pressing plate 5 can just be parallel and fit the wall surface of the wall, achieving stable pressing positioning; also, by providing the anti-slip gasket 52, it can effectively prevent the pressing plate 5 from sliding relative to the wall being pressed, achieving stable pressing and positioning.

[0049] In a specific implementation, the pivot convex portion 501 can be a semi-spherical bump, and the pivot concave portion 301 correspondingly is a round hole or a concave pit, or the pivot convex portion 501 is a convex shaft while the pivot concave portion 301 is a round hole.

[0050] On the other hand, an embodiment of the present utility model provides a curtain, which includes an upper beam B and an upper beam hole-free installation device assembled at at least one end of the upper beam B, and the upper beam hole-free installation device A is the upper beam B hole-free installation device of any one of the above. In this embodiment, the curtain adopts the foregoing upper beam hole-free installation device A, and the installation structure is simpler.

[0051] The embodiments of the present utility model have been described above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above specific implementation manners. The above specific implementation manners are merely illustrative and not restrictive. Under the inspiration of the present utility model, those of ordinary skill in the art can also make many forms without departing from the purpose of the present utility model and the scope protected by the claims. All of these fall within the protection scope of the present utility model.

Claims

1. An upper beam installation device without drilling holes, comprising a mounting seat fixed to one end of the end portion of the upper beam of the curtain, characterized in that, The device further includes: a screw rod whose axis is parallel to the length direction of the upper beam and is axially movably assembled on the mounting base, and an anti-rotation structure is provided between the screw rod and the mounting base to prevent the screw rod from rotating circumferentially; a pressure plate assembled at one end of the screw rod away from the upper beam and used for tightly abutting and positioning against the wall on one side of the window body; and an adjusting mechanism assembled on the mounting base for driving the screw rod to axially move, and the adjusting mechanism includes: a worm pivotally provided on the mounting base, pivotally connected shafts corresponding to the mounting base are formed at opposite ends of the worm, and a driving portion for driving the worm to rotate is provided at the end of at least one of the pivotally connected shafts; and a worm wheel pivotally provided on the mounting base and meshing with the worm, a threaded hole coaxial with the worm wheel is formed at the center of the worm wheel, and the worm wheel drives the screw rod to extend and retract relative to the mounting base with the threaded hole screwed with the screw rod.

2. The upper beam non-drilling installation device according to claim 1, characterized in that, The driving portion is a driving hole with a non-circular cross-section formed by corresponding depression at the end face of the pivotally connected shaft or a driving rod coaxially arranged with the pivotally connected shaft at the end of the pivotally connected shaft and having a non-circular cross-section.

3. The upper beam hole-free installation device according to claim 1, characterized in that The mounting base is a box body with an accommodation cavity inside, one end of the box body protrudes to form a plug-in portion for corresponding plug-in positioning with the end of the upper beam, and a through hole is formed at the middle of the end wall of the other end. The adjusting mechanism is assembled in the accommodation cavity of the box body, one end of the screw rod extends out of the box body through the through hole, and a through hole for the driving portion to be exposed is also provided on the side surface of the box body.

4. The upper beam hole-free installation device according to claim 3, wherein, The box body is composed of a box main body with the accommodation cavity formed inside and an opening at one end, and a cover plate detachably assembled at the opening to cover the opening.

5. The upper beam hole-free installation device according to claim 4, characterized in that, The through hole is formed at the middle of the cover plate, and a pressing convex column protruding towards the inside of the box body is formed around the through hole on the inner side surface of the cover plate. A positioning ring is formed at the middle of the side wall of the box body of the box main body facing the cover plate. The opposite ends of the worm wheel are respectively pressed by the pressing convex column on the cover plate and the positioning ring for axial positioning.

6. The upper beam hole-free installation device according to claim 5, characterized in that The inner hole of the positioning ring also correspondingly penetrates through the box wall of the box main body.

7. The upper beam hole-free installation device according to claim 3, characterized in that The anti-rotation structure includes a positioning convex key extending axially provided on the hole wall of the through hole and a positioning key groove extending axially provided on the outer side surface of the screw rod, and the positioning convex key is correspondingly inserted into the positioning key groove.

8. The upper beam hole-free installation device according to claim 4, characterized in that, Axial seats are respectively formed on one side wall of the accommodation cavity and the inner side surface of the cover plate corresponding to each pivotally connected shaft. Positioning semi-grooves are respectively recessed on the opposite side surfaces of the two axial seats. When the cover plate is fixed on the box main body, the positioning semi-grooves of the two axial seats enclose to form a pivot hole for the pivotally connected shaft to pivotally arrange. The through hole is opened on the side wall of the accommodation cavity where the axial seat is formed and is opposite to the pivot hole; a positioning ring groove is correspondingly recessed on the outer side wall of the middle section of the pivotally connected shaft, and a positioning convex ring is correspondingly protruded on the hole wall of the pivot hole. When the pivotally connected shaft is assembled into the pivot hole, the pivotally connected shaft is axially positioned with the positioning ring groove and the positioning convex ring correspondingly engaged.

9. The upper beam non-drilling installation device according to claim 1, characterized in that On the middle part of one side of the pressure plate facing the screw rod, a pivot seat is correspondingly protruded, and an anti-slip gasket is arranged on the opposite side. On the opposite two side surfaces of the pivot seat, pivot convex parts are respectively protruded. On the corresponding end face of the screw rod, two pivot tabs are protruded at intervals. Each pivot tab is also provided with a pivot recess. The screw rod is pivotally connected to the pivot seat with the two pivot tabs respectively located on the opposite two sides of the pivot seat and the pivot recesses corresponding to and mating with the pivot convex parts.

10. A curtain, comprising an upper beam and an upper beam hole-free installation device assembled at at least one end of the upper beam, characterized in that, The upper beam hole-free installation device is the upper beam hole-free installation device according to any one of claims 1-9.

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