Curtain and drill-free mounting device for upper beam thereof

Abstract

Provided in the embodiments of the present application are a curtain and a drill-free mounting device for an upper beam thereof, the device comprising a mounting base having one end fixed to an end portion of the upper beam of the curtain; a screw rod axially arranged parallel to the length of the upper beam and axially movably assembled on the mounting base, wherein an anti-rotation structure is provided between the screw rod and the mounting base; a pressing plate assembled at the end of the screw rod away from the upper beam and configured to abut against and position a wall on one side of a window; and an adjustment mechanism assembled on the mounting base and configured to drive the screw rod to move axially. The adjustment mechanism comprises: a worm pivotally arranged on the mounting base, pivot shafts for corresponding pivotal connection to the mounting base being formed on two opposite ends of the worm, and a driving part for driving the worm to rotate being provided at the tail end of at least one pivot shaft; and a worm wheel pivotally arranged on the mounting base and remaining meshed with the worm, wherein a screw hole coaxial with the worm wheel is provided at the center of the worm wheel, and the screw hole of the worm wheel is threadedly engaged with the screw rod, thus driving the screw rod to extend and retract relative to the mounting base. The present embodiment has a simple structure and is convenient to use.

Description

Curtain and its upper beam hole-free mounting device TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of curtain accessories, in particular to a curtain and its upper beam hole-free mounting device. BACKGROUND

[0002] The curtain upper beam hole-free mounting device gradually becomes popular due to its convenience of quickly realizing the installation and positioning operation of the curtain upper beam without punching holes.

[0003] The existing curtain upper beam hole-free mounting device mainly comprises: a mounting seat fixed at one end of the upper beam end portion and having a cavity inside, a linkage member with a worm gear portion and a screw rod portion at two ends and with the worm gear portion extending into the cavity of the mounting seat, a worm gear assembled in the mounting seat and meshing with the worm gear portion of the linkage member to drive the rotation of the linkage member, an adjusting top block extending into the mounting seat, a locking piece screwed on the screw rod portion of the linkage member for limiting the moving stroke of the adjusting top block along the axial direction to the inside of the mounting seat, and a resilient member abutting against the driving member and the adjusting top block at two ends, wherein the adjusting top block is pushed outwards by the resilient member and abuts against the wall. One end of the worm gear is exposed from the mounting seat to facilitate the operation of the worm gear. When specifically used for assembling the upper beam, the mounting seat end of the device is fixed to the upper beam end portion, and the adjusting top block is slightly moved inwards to enable the upper beam to be assembled into the window frame. The adjusting top block is abutted against the mounting wall surface on both sides of the window frame to realize the pre-assembly under the action of the resilient member. Then, the worker drives the worm gear to drive the rotation of the linkage member, and then the locking piece moves along the axial direction to the adjusting top block to abut against the adjusting top block, preventing the elastic retraction of the adjusting top block, thereby realizing the hole-free installation, and also being compatible with different widths of window frames in a small range.

[0004] However, the inventor found in the specific implementation that the above-mentioned hole-free mounting device has a relatively complex structure, relatively more parts, and relatively troublesome production and manufacturing. In addition, the adjusting top block is pushed out and abutted against the wall under the extrusion action of the resilient member, and then locked by the locking piece. When disassembling, it is relatively difficult to overcome the elastic force of the resilient member to push the adjusting top block to retract after adjusting the locking piece to the unlocking position. TECHNICAL PROBLEM

[0005] The technical problem to be solved by the embodiment of the present application is to provide a curtain upper beam hole-free mounting device with a simple structure and easy operation.

[0006] The technical problem to be solved by the embodiment of the present application is to provide a curtain with a simple mounting structure and easy operation. SOLUTION

[0007] To solve the above technical problems, the embodiment of the present application provides the following technical scheme: a curtain upper beam hole-free mounting device, comprising:

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

[0009] A screw rod axially parallel to the length direction of the upper beam and axially movably assembled on the mounting seat, a rotation stopping structure being arranged between the screw rod and the mounting seat to prevent the screw rod from rotating circumferentially;

[0010] A pressing plate assembled at one end of the screw rod away from the upper beam and used for abutting against and positioning with the wall body on one side of the window; and

[0011] An adjusting mechanism assembled on the mounting seat and used for driving the screw rod to move axially, the adjusting mechanism comprising:

[0012] A worm shaft pivotally arranged on the mounting seat, opposite ends of the worm shaft being formed with pivot shafts pivotally connected with the mounting seat, and a driving portion being arranged at the end of at least one of the pivot shafts and used for driving the worm shaft to rotate; and

[0013] A worm gear pivotally arranged on the mounting seat and in engagement with the worm shaft, a screw hole coaxial with the worm gear being formed at the worm gear hub, and the worm gear being in screw engagement with the screw rod via the screw hole to drive the screw rod to extend and retract relative to the mounting seat.

[0014] Further, the driving portion is a driving hole with a non-circular cross section formed by corresponding recesses on the end surface of the pivot shaft or a driving rod coaxially arranged at the end of the pivot shaft and having a non-circular cross section.

[0015] Further, the mounting seat is a box body with an accommodating cavity inside, one end of the box body protruding outwards for plug-in positioning with the end of the upper beam via a plug-in part, and a through hole being formed in the middle of the other end wall, the adjusting mechanism being assembled in the accommodating cavity of the box body, one end of the screw rod extending outwards of the box body via the through hole, and the side surface of the box body being further provided with a through hole for the driving portion to protrude outwards.

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

[0017] Further, the through hole is arranged in the middle of the cover plate, a pressing protruding column is further formed on the inner side 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 opposite to the cover plate, and the worm gear is axially positioned by the pressing protruding column on the cover plate and the positioning ring corresponding to the opposite ends of the worm gear.

[0018] Further, the inner hole of the positioning ring also corresponds to the box wall penetrating the box body.

[0019] Further, the rotation-stopping structure comprises a positioning key arranged on the hole wall of the through hole and extending in the axial direction, and a positioning key groove arranged on the outer side surface of the screw rod and extending in the axial direction, the positioning key being inserted into the positioning key groove.

[0020] Further, one side wall of the accommodating cavity and the inner side surface of the cover plate are respectively provided with an axle seat corresponding to each of the pivot shafts, and opposite side surfaces 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 form a pivot hole for the pivot shafts, the through hole is arranged on the side wall of the accommodating cavity provided with the axle seat and faces the pivot hole; the outer side wall of the middle section of the pivot shaft is recessed to form a positioning ring groove, and the hole wall of the pivot hole is correspondingly protruded to form a positioning convex ring, when the pivot shaft is assembled into the pivot hole, the positioning ring groove and the positioning convex ring are correspondingly engaged to axially position the pivot shaft.

[0021] Further, the side surface of the pressing plate corresponding to the screw rod is protruded to form a pivot seat, and the other side surface is provided with an anti-skid gasket, opposite side surfaces of the pivot seat are respectively protruded to form a pivot convex part, and the end surface of the screw rod is protruded to form two pivot tabs, each pivot tab is further provided with a pivot recess, and the screw rod is pivotally connected to the pivot seat by the two pivot tabs correspondingly arranged on opposite side surfaces of the pivot seat and the pivot recess and the pivot convex part correspondingly matched.

[0022] On the other hand, in order to solve the above-mentioned further technical problems, the embodiment of the present application provides the following technical scheme: a curtain, comprising an upper beam and an upper beam hole-free mounting device assembled at least one end of the upper beam, the upper beam hole-free mounting device being the curtain upper beam hole-free mounting device as any one of the above. Advantages

[0023] The application has at least the following beneficial effects: the adjusting mechanism is formed by the engagement of the worm and the worm wheel, the worm wheel is threadedly connected with the screw rod provided with the pressing plate at one end through the screw hole formed at the wheel core, the driving part provided at the pivot end of the worm and exposed from the upper beam is operated to drive the screw rod to rotate and axially move to extend outward relative to the end surface of the upper beam, and then the pressing plate assembled at one end of the screw rod extending out of the upper beam is tightly pressed against the corresponding wall to fix the upper beam, when the upper beam needs to be disassembled, the screw rod is reversely retracted and moved by reversely operating the driving part, the pressing plate is separated from the wall, and the upper beam can be removed. BRIEF DESCRIPTION OF DRAWINGS DETAILED DESCRIPTION OF THE INVENTION BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 is a split structure schematic view of an optional embodiment of the upper beam hole-free mounting device of the application and the upper beam.

[0025] Fig. 2 is an assembled structure schematic view of an optional embodiment of the upper beam hole-free mounting device of the application and the upper beam.

[0026] Fig. 3 is a cross-sectional structure schematic view of an optional embodiment of the upper beam hole-free mounting device of the application and the upper beam.

[0027] Fig. 4 is a cross-sectional structure schematic view of an optional embodiment of the upper beam hole-free mounting device of the application along the plane perpendicular to the axial direction of the screw rod.

[0028] Fig. 5 is a cross-sectional structure schematic view of an optional embodiment of the upper beam hole-free mounting device of the application along the plane in the axial direction of the worm.

[0029] Fig. 6 is a structure schematic view of the box body of an optional embodiment of the upper beam hole-free mounting device of the application.

[0030] Fig. 7 is a split structure schematic view of the screw rod and the pressing plate of an optional embodiment of the upper beam hole-free mounting device of the application. EMBODIMENTS OF THE INVENTION

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

[0032] As shown in FIG. 1-5, one optional embodiment of the present application provides a window curtain upper beam hole-free mounting device A, comprising:

[0033] a mounting base 1 fixed at one end of the upper beam B;

[0034] a screw rod 3 axially parallel to the length direction of the upper beam B and axially movably assembled on the mounting base 1, wherein a rotation-stopping structure 4 is arranged between the screw rod 3 and the mounting base 1 to prevent the screw rod 3 from rotating circumferentially;

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

[0036] an adjusting mechanism 7 assembled on the mounting base 1 and used for driving the screw rod 3 to move axially, wherein the adjusting mechanism 7 comprises:

[0037] a worm 70 pivoted on the mounting base 1, wherein opposite ends of the worm 70 are formed with pivoting shafts 701 corresponding to the mounting base 1, and at least one end of the pivoting shaft 701 is provided with a driving part 703 used for driving the worm 70 to rotate; and

[0038] a worm wheel 72 pivoted on the mounting base 1 and kept in engagement with the worm 70, wherein a screw hole 721 coaxial with the worm wheel 72 is formed at the worm wheel 72, and the worm wheel 72 is threadedly connected with the screw rod 3 at the screw hole 721 to drive the screw rod 3 to extend or retract relative to the mounting base 1.

[0039] The embodiment of the present application adopts the worm 70 and the worm wheel 72 to form the adjusting mechanism, and the worm wheel 72 is threadedly connected with the screw rod 3 at the screw hole 721 formed at the worm wheel 72 and provided with the pressing plate 5 at one end, so that the driving part 703 provided at the end of the pivoting shaft 701 of the worm 70 and exposed outside the upper beam B can drive the screw rod 3 to rotate and move axially to extend outward relative to the end face of the upper beam B, and then the pressing plate 5 assembled at one end of the screw rod 3 extending out of the upper beam B abuts against the corresponding wall body to fix the upper beam B, and when the upper beam B needs to be disassembled, the driving part 703 is operated reversely to make the screw rod 3 move reversely and retract, and the pressing plate 5 is separated from the wall body, so that the upper beam B can be removed. The hole-free mounting device of the upper beam B provided by the present application has simple overall structure and does not need to provide the pressing force by the elastic member, and the operation of disassembling and assembling the upper beam B is very convenient in actual application. Moreover, the helix angle of the worm 70 is designed to be 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 property during transmission, thereby avoiding the screw rod 3 from easily extending or retracting along the axial direction under the external force.

[0040] In the embodiment, the pivot shaft 701 is arranged at both ends of the worm 70, and the driving part 703 is arranged correspondingly, so that the driving part 703 is exposed at both sides of the mounting base 1. In the assembly, the device does not need to be distinguished as front or back, and the assembly efficiency is improved.

[0041] In an optional embodiment of the present application, as shown in FIGS. 1-2, the driving part 703 is a driving hole with a non-circular cross section formed by corresponding recessing from the end surface of the pivot shaft 701, or a driving rod with a non-circular cross section arranged coaxially with the pivot shaft 701 at the end of the pivot shaft 701. In the embodiment, in order to facilitate the rotation of the worm 70, various embodiments of the driving part 703 are designed. In the embodiment shown in FIGS. 1-4, the driving part 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 the driving rod is used as the driving part 703, the cross section of the driving rod can be triangular, rectangular, hexagonal, elliptical, etc.

[0042] In an optional embodiment of the present application, as shown in FIGS. 1-6, the mounting base 1 is a box body with an accommodating cavity 10 inside. One end of the box body 1 protrudes an insertion part 12 for being inserted and positioned correspondingly with the end of the upper beam B, and the other end wall has a through hole 13 formed in the middle. The adjusting mechanism 7 is assembled in the accommodating cavity 10 of the box body 1. One end of the screw rod 3 extends to the outside of the box body 1 through the through hole 13. The side surface of the box body 1 is further provided with a through hole 14 for exposing the driving part 701 (it can be understood that the through hole 14 is arranged one by one corresponding to the driving part 701). In the embodiment, the mounting base 1 adopts the box body with the accommodating cavity 10 inside, which can effectively protect the matching parts of the adjusting mechanism 7 and the screw rod 3 inside the box body 1, so as to avoid the foreign matters falling between the matching parts of the relatively movable components and affecting the smoothness of transmission.

[0043] In an optional embodiment of the present application, as shown in FIGS. 1-6, the box body 1 is composed of a box main body 15 with the accommodating cavity 10 formed inside and an opening 151 at one end, and a cover plate 16 detachably assembled at the opening 151 to cover the opening 151. In the embodiment, the box body 1 is formed by combining the box main body 15 and the cover plate 16, which facilitates the adjusting mechanism 7 to be assembled into the accommodating 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 application, as shown in FIG. 1, FIG. 3 and FIG. 6, the through hole 13 is arranged in the middle of the cover plate 16, and a pressing protrusion 161 is formed on the inner side of the cover plate 16 around the through hole 13 and protrudes towards the inside of the box body 1. A positioning ring 153 is formed in the middle of the side wall of the box body 15 opposite to the cover plate 16, and the worm gear 72 is axially positioned by being pressed by the pressing protrusion 161 on the cover plate 16 and the positioning ring 153. In this embodiment, the worm gear 72 is axially positioned by being pressed from both ends by the pressing protrusion 161 on the cover plate 16 and the positioning ring 153 formed in the middle of the side wall of the box body 15, which effectively realizes the positioning of the worm gear 72, and the structure is simple and convenient to assemble.

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

[0046] In an alternative embodiment of the present application, as shown in FIG. 1, FIG. 3 and FIG. 7, the rotation stopping structure 4 includes a positioning key 40 arranged on the hole wall of the through hole 13 and extending in the axial direction, and a positioning groove 42 arranged on the outer side of the screw rod 3 and extending in the axial direction, and the positioning key 40 is inserted into the positioning groove 42. In this embodiment, the positioning key 40 on the hole wall of the through hole 13 and the positioning groove 42 on the outer side of the screw rod 3 are inserted and matched with each other, which effectively limits the screw rod 3 in the circumferential direction, and the structure is simple.

[0047] In an alternative embodiment of the present application, as shown in FIG. 1, FIG. 4-6, one side wall of the accommodating cavity 10 and the inner side of the cover plate 16 correspond to each of the pivot shafts 701 and are respectively formed with shaft seats 101, the opposite sides of the two shaft seats 101 are respectively formed with positioning half grooves 103, when the cover plate 16 is fixed to the box body 15, the positioning half grooves 103 of the two shaft seats 101 are combined to form a pivot hole 105 for pivoting the pivot shaft 701, the through hole 14 is formed on the side wall of the accommodating cavity 10 with the shaft seat 101 and is opposite to the pivot hole 105; the outer side wall of the middle section of the pivot shaft 701 is correspondingly recessed to form a positioning ring groove 701a, the hole wall of the pivot hole 105 is correspondingly protruded to form a positioning convex ring 105a, when the pivot shaft 701 is assembled to the pivot hole 105, the pivot shaft 701 is positioned in the axial direction by the positioning ring groove 701a and the positioning convex ring 105a. In this embodiment, by correspondingly protruding the shaft seat 101 on one side wall of the accommodating cavity 10 and the inner side of the cover plate 16 to each of the pivot shafts 701, during specific assembly, one side of each pivot shaft 701 of the worm 70 can be first installed on the positioning half groove 103 of the inner wall shaft seat 101 of the accommodating cavity 10, then the cover plate 16 is buckled, the other side of the pivot shaft 701 is positioned by the positioning half groove 103 of the shaft seat 101 of the cover plate 16, the installation of the worm 70 is completed, the assembly is very convenient, the worm 70 can be positioned by the cover plate 16; and the positioning ring groove 701a of the pivot shaft 701 and the positioning convex ring 105a of the pivot hole 105 are mutually engaged, the pivot shaft 701 can be positioned in the axial direction, the pivot shaft 701 is prevented from moving in the axial direction, and stable positioning is achieved.

[0048] In an alternative embodiment of the present application, as shown in FIG. 3 and FIG. 7, the side surface of the pressing plate 5 corresponding to the middle section of the screw rod 3 is correspondingly protruded to form a pivot seat 50, and the opposite side surface is provided with an anti-skid pad 52, the opposite sides of the pivot seat 50 are each protruded to form a pivot convex part 501, the end surface of the screw rod 3 protruding out of the upper beam B is protruded to form two pivot tabs 30, each pivot tab 501 is further provided with a pivot recess 301, the screw rod 3 is pivoted to the pivot seat 50 by the two pivot tabs 30 corresponding to the opposite sides of the pivot seat 50 and matched by the pivot recess 301 and the pivot convex part 501. In this embodiment, the pivot recess 301 on the pivot tab 30 of the screw rod 3 and the pivot convex part 501 on the pivot convex part 501 of the pressing plate 5 are mutually pivoted and matched, the screw rod 3 and the pressing plate 5 are connected by pivoting, during specific installation, the pressing plate 5 can be slightly rotated, the pressing surface of the pressing plate 5 can be exactly parallel to the wall surface of the wall body, stable pressing positioning is achieved; the anti-skid pad 52 can effectively prevent the pressing plate 5 from relatively sliding with the wall to be pressed, stable pressing positioning is achieved.

[0049] In specific implementation, the pivot convex part 501 can be a semicircular convex point, the pivot concave part 301 is a round hole or a pit, or the pivot convex part 501 is a convex shaft and the pivot concave part 301 is a round hole.

[0050] On the other hand, the embodiment of the present application provides a curtain, comprising an upper beam B and an upper beam hole-free mounting device assembled to at least one end of the upper beam B, wherein the upper beam hole-free mounting device A is the curtain upper beam hole-free mounting device according to any one of the above. In the embodiment, the curtain adopts the above-mentioned upper beam hole-free mounting device A, and the mounting structure is simpler.

[0051] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative but not restrictive. Those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope of protection of the claims, and these all belong to the protection scope of the present application.

Claims

1. A window curtain top rail hole-free mounting device, comprising a mounting base fixed at one end to the end portion of the top rail of a window curtain, characterized in that, The device further comprises: a screw rod arranged axially parallel to the length direction of the upper beam and movably assembled on the mounting base, a rotation-stopping structure being arranged between the screw rod and the mounting base to prevent the screw rod from rotating circumferentially; a pressing plate assembled on the end of the screw rod away from the upper beam and used for abutting against a wall on one side of the window body; and an adjusting mechanism assembled on the mounting base and used for driving the screw rod to move axially, the adjusting mechanism comprising: a worm rod pivotally arranged on the mounting base, opposite ends of the worm rod being formed with pivot shafts corresponding to the mounting base, and a driving portion being arranged at the end of at least one of the pivot shafts and used for driving the worm rod to rotate; and a worm gear pivotally arranged on the mounting base and engaged with the worm rod, a screw hole coaxial with the worm gear being formed at the center of the worm gear, and the worm gear being driven to drive the screw rod to stretch or retract relative to the mounting base by screwing the screw hole with the screw rod.

2. The curtain rail head punchless mounting device according to claim 1, characterized in that, The driving portion is a driving hole with a non-circular cross section formed by corresponding recessing the end face of the end of the pivot shaft or a driving rod with a non-circular cross section arranged coaxially on the end of the pivot shaft.

3. The curtain rail head punchless mounting device according to claim 1, wherein The mounting base is a box body with an accommodating cavity inside, one end of the box body protruding for being inserted into the end of the upper beam and the other end wall being formed with a through hole in the middle, the adjusting mechanism being assembled in the accommodating cavity of the box body, one end of the screw rod extending to the outside of the box body through the through hole, and the side of the box body being further formed with a through hole for the driving portion to extend out.

4. The curtain rail head punchless mounting device according to claim 3, wherein The box body is composed of a box main body with the accommodating cavity formed inside and an opening at one end and a cover plate detachably assembled on the opening to cover the opening.

5. The curtain rail head punchless mounting device according to claim 4, wherein The through hole is arranged in the middle of the cover plate, the inner side of the cover plate further protruding towards the inside of the box body around the through hole to form a pressing protruding column, the middle of the box wall on one side of the box main body opposite to the cover plate being formed with a positioning ring, and the worm gear being axially positioned by being pressed by the pressing protruding column on the cover plate and the positioning ring respectively.

6. The curtain rod mounting device of claim 5, wherein, The inner hole of the positioning ring further penetrates the box wall of the box main body.

7. The window treatment headrail punchless mounting device of claim 3, wherein, The rotation-stopping structure comprises a positioning protruding key arranged on the hole wall of the through hole and extending axially and a positioning key groove arranged on the outer side of the screw rod and extending axially, and the positioning protruding key is inserted into the positioning key groove.

8. The curtain rod mounting device of claim 4, wherein, One side wall of the accommodating cavity and the inner side of the cover plate are respectively formed with an axle seat corresponding to each pivot shaft, opposite sides of the two axle seats are respectively recessed to form positioning half grooves, the cover plate is fixed on the box main body, the positioning half grooves of the two axle seats jointly form a pivot hole for the pivot shaft to be pivotally arranged, the through hole is arranged on the side wall of the accommodating cavity formed with the axle seat and opposite to the pivot hole, the outer side wall of the middle section of the pivot shaft is recessed to form a positioning ring groove, and a positioning protruding ring is protruded on the hole wall of the pivot hole, and the pivot shaft is assembled into the pivot hole to position the pivot shaft axially by the positioning ring groove and the positioning protruding ring being correspondingly engaged.

9. The curtain rod mounting device of claim 1, wherein, The pressing plate is correspondingly protruded in the middle of one side of the screw rod to form a pivot seat, and a non-slip pad is arranged on the other side, the opposite sides of the pivot seat are each protruded to form a pivot convex part, and the end faces of the screw rod are correspondingly protruded to form two pivot tabs, and each pivot tab is further provided with a pivot recess, and the screw rod is pivoted on the pivot seat by corresponding the two pivot tabs on the opposite sides of the pivot seat and by corresponding cooperation of the pivot recess and the pivot convex part.

10. A window treatment comprising a headrail and a headrail punchless mounting device assembled to at least one end of the headrail, characterized in that, The upper beam hole-free mounting device is the upper beam hole-free mounting device for a curtain according to any one of claims 1-9.

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