CN112727335A - Venetian blind and lower rail of venetian blind - Google Patents

Abstract

The invention provides a shutter and a lower rail of the shutter, the lower rail comprises: an elongated frame having a top wall and two sidewalls; an accommodating space formed between the top wall and the two side walls; at least two rope holes which are arranged on the top wall of the frame body and communicated with the vacant space; a long counterweight piece which is arranged in the accommodating space; a long sheet material embedded in the bottom of the frame. The pull rope and the tail end of the ladder rope/ladder belt of the blind penetrate into the accommodating space of the frame body and are connected with the fixing piece.

Description

Venetian blind and lower rail of venetian blind

Technical Field

The present invention relates to window blinds, and more particularly, to a lower rail of a window blind and a window blind having the same.

Background

The window covering has various forms, and the window covering is a common window covering, and referring to fig. 1, the window covering 10 has anupper rail 12, alower rail 14, a plurality ofwindow covering vanes 15 installed between the upper and lower rails, a plurality ofpull ropes 16, a plurality ofladder ropes 17 connected between the upper andlower rails 12, 14 and thewindow covering vanes 15; a plurality offasteners 18 mounted on the bottom end of thelower rail 14 for fixing the bottom end of theladder rope 17 to thelower rail 14. Theupper rail 12 is also provided with arolling adjustment mechanism 19, which can control thepull ropes 16 and the ladder ropes 17 to control the lifting and lowering of thecurtain blades 15 and adjust the angle of the curtain blades, so as to achieve the purpose of shading and dimming.

In the existing venetian blind structure, the bottom end of theladder cord 17 is fixed to thelower rail 14 by thefastener 18, and thefastener 18 fastens the outer circumferential surface of thelower rail 14 and is exposed out of the lower rail, which is not good for appearance. Moreover, such a connection structure has been used for a long time and needs to be improved.

In addition, thelower rail 14 of the conventional venetian blind is a single member, such as an article made of aluminum, which has a monotonous outer shape, is not matched with theslats 15 of the venetian blind in terms of material and color, and cannot form a sense of unity with theslats 15 of the venetian blind.

Disclosure of Invention

The invention aims to solve the technical problems and provides a blind and a lower rail of the blind, and provides an innovative structure for the lower rail of the blind.

Another object of the present invention is to provide a lower rail of a window blind, which has a more elegant appearance.

Another object of the present invention is to provide a lower rail of a window blind, which has a sense of unity with the blind slats of the window blind.

A lower rail of a window blind, comprising:

an elongated frame having a single cross-sectional shape and having a top wall and two side walls; an accommodating space formed between the top wall and the two side walls; at least two rope holes which are arranged on the top wall of the frame body and communicated with the vacant space;

a long counterweight piece which is arranged in the accommodating space;

and the long sheet is arranged on the bottom surface of the frame body, and two sides of the sheet are embedded with the two side walls.

At least two side holes are respectively arranged on two sides of the frame body and communicated with the accommodating space.

The bottom edges of the two side walls are respectively provided with an embedded groove; two sides of the sheet are respectively embedded in the two embedding grooves.

At least one long embedded rib arranged in the accommodating space of the frame body along the longitudinal direction of the frame body; the circumferential surface of the counterweight is provided with at least one embedded part along the longitudinal direction, and the counterweight is embedded and connected with the embedded rib by the embedded part.

At least two long embedded ribs are longitudinally arranged on the frame body, each embedded rib is provided with a free end, and the free ends of the two embedded ribs keep intervals and are opposite; two sides of the weight piece are respectively provided with an embedding part, and the two embedding parts are embedded with the free ends of the two embedding ribs.

The lower rail of the blind further comprises: a second sheet material, which is placed on the top wall of the frame body; two through holes are arranged on the second sheet material and respectively correspond to the two rope holes.

Two strip bodies for keeping gaps are arranged on the inner wall surface of each side wall of the frame body along the longitudinal direction of the frame body; each caulking groove is formed between the two strips.

The material of the counterweight part is softer than metal.

A window blind, comprising:

a plurality of curtain blades arranged up and down;

a plurality of pull ropes passing through the curtain vanes;

a plurality of ladder ropes respectively arranged at two sides of the curtain blades; and a lower rail of a blind curtain,

the lower rail includes: an elongated frame having a single cross-sectional shape and having a top wall and two side walls; an accommodating space formed between the top wall and the two side walls; at least two rope holes which are arranged on the top wall of the frame body and communicated with the vacant space;

a long counterweight piece which is arranged in the accommodating space;

the long sheet is arranged on the bottom surface of the frame body, and two sides of the sheet are embedded with the two side walls;

the lower rail is positioned below the curtain vanes;

the bottom end of each pull rope penetrates into the accommodating space of the frame body from the rope hole on the top wall of the frame body and is connected with the counterweight;

the bottom end of each ladder rope penetrates through a gap between one side of the sheet and one side wall of the frame body and enters the accommodating space to be fixedly connected with the counterweight.

A window blind, comprising:

a plurality of curtain blades arranged up and down;

a plurality of pull ropes passing through the curtain vanes;

a plurality of ladder ropes or ladder belts which are respectively arranged at two sides of the curtain blades; and a lower rail of a blind curtain,

the lower rail includes: an elongated frame having a single cross-sectional shape and having a top wall and two side walls; an accommodating space formed between the top wall and the two side walls; at least two rope holes which are arranged on the top wall of the frame body and communicated with the vacant space;

a long counterweight piece which is arranged in the accommodating space;

the long sheet is arranged on the bottom surface of the frame body, and two sides of the sheet are embedded with the two side walls; two sides of the frame body are respectively provided with at least two side holes which are communicated with the accommodating space;

the lower rail is positioned below the curtain vanes;

the bottom end of each pull rope penetrates into the accommodating space of the frame body from a rope hole in the top wall of the frame body and is connected with the counterweight;

the bottom end of each ladder rope or ladder belt penetrates into the accommodating space of the frame body from one side hole of one side wall of the frame body and is connected with the counterweight.

The invention has the beneficial effects that:

the lower rail provides a novel structure and the rope combination of the blind, the pull rope and the tail end of the ladder rope/ladder belt of the blind penetrate into the containing space of the frame body and are connected with the fixing piece. The connecting structure of the ropes (the pull ropes, the ladder ropes and the ladder belts) and the lower rail of the blind is hidden in the lower rail, so that the lower rail and the blind are more attractive integrally.

The lower rail can be provided with a plurality of side holes on two side walls of the frame body respectively, and the tail ends of the ladder rope and the ladder belt of the blind can penetrate into the frame body through the side holes.

Preferably, the sheet material of the lower rail is the same as the curtain vanes of the blind, so that the sheet material of the lower rail is consistent with the curtain vanes, and the blind has a sense of unity.

Drawings

Fig. 1 is a perspective view of a conventional window blind.

Fig. 2 is a perspective view of the lower rail according to the first preferred embodiment of the present invention.

Fig. 3 is an exploded perspective view of fig. 2.

Fig. 4 is a bottom exploded perspective view of fig. 2.

Figure 5 is a transverse cross-sectional view of the lower track shown in figure 2 along section line 5-5.

Fig. 6 is a cross-sectional view taken along line 6-6 of fig. 5.

Fig. 7 is a window shade formed with the lower rail of fig. 2 installed.

Fig. 8 is a partially enlarged view of fig. 7.

Fig. 9 is a cross-sectional view taken along line 9-9 of fig. 7.

Fig. 10 is a perspective view of a lower rail in accordance with a second preferred embodiment of the present invention.

Fig. 11 is a window shade formed with the lower rail of fig. 10 installed.

Fig. 12 is a partially enlarged view of fig. 11.

Fig. 13 is a perspective view of a lower rail in accordance with a third preferred embodiment of the present invention.

FIG. 14 is a window shade formed with the lower rail of FIG. 13 installed.

Fig. 15 is a cross-sectional view taken along line 15-15 of fig. 14.

Fig. 16 is a transverse cross-sectional view of a lower rail in accordance with a fourth preferred embodiment of the present invention.

20. 20 ', 20' bottom rail, 30 frame, 31 top wall, 32 side wall, 33 rope hole, 34 'side hole 35 containing space, 36 caulking groove, 361 strip body, 38 caulking rib, 381 free end, 40 weight piece, 42 caulking part, 50 sheet material, 52 second sheet material, 53 perforation, 55 end cover, 56 clamping edge, 60' blind curtain, 62 top rail, 64 curtain blade, 65 pull rope, 651 staple needle, 66 ladder belt, 661 staple needle, 67 span rope, 68 ladder rope, 681 rope section, 682 staple needle, 69 furling adjusting mechanism.

Detailed Description

Referring to fig. 2 to 4, alower rail 20 of a window blind according to a first preferred embodiment of the present invention, especially for use in a window blind, thelower rail 20 mainly includes: anelongated frame 30, anelongated weight 40, and anelongated sheet 50.

Theframe 30 is an elongated body having a single sectional shape, for example, made of aluminum extrusion, and has atop wall 31 and twoside walls 32; anaccommodating space 35 is formed between thetop wall 31 and the twoside walls 32. At least tworope holes 33 are arranged on thetop wall 31 of theframe body 30 and communicated with thevacant space 35, the tworope holes 33 are arranged along the longitudinal direction of theframe body 30, the number and the positions of the rope holes 33 are determined according to the number and the positions of the pull ropes of the blind, when the size of the blind is larger and a larger number of pull ropes are arranged, the same number of rope holes 33 are arranged on theframe body 30. Eachside wall 32 of theframe 30 is provided with at least twoside holes 34 communicating with theaccommodating space 35, as shown in fig. 2 to 4, the number and positions of the side holes 34 of eachside wall 32 correspond to the number and positions of the rope holes 33. Theside hole 34 of this embodiment is an elongated hole suitable for use in a window blind for ladder tapes.

The bottom edges of the twoside walls 32 are respectively provided with acaulking groove 36, wherein, referring to fig. 5, the inner wall surface of eachside wall 32 is provided with twostrips 361 along the longitudinal direction of theframe 30, and the twostrips 361 are arranged up and down and keep a gap; each of theslots 36 is formed between the twobodies 361, and theslot 36 has an opening facing the inside of theframe 30. Two embeddedribs 38 are disposed in theaccommodating space 35 along the longitudinal direction of the frame body, and the two embeddedribs 38 are disposed in the frame body in parallel in the left and right direction with respect to the cross section of theframe body 30 in fig. 5. The free ends 381 of the tworibs 38 are facing and spaced apart.

Theweight member 40 is made of a softer material than iron, such as wood or plastic, in this embodiment, a wood weight member is selected, two lateral sides of theweight member 40 are respectively provided with an engagingportion 42 along the longitudinal direction thereof, and each engagingportion 42 is a groove in this embodiment. Theweight 40 is moved into the frame from one end of theframe 30 and is installed in the receivingspace 35 of theframe 30, as shown in fig. 5, and theengagement portions 42 at two sides of theweight 40 are engaged with the free ends 381 of the twoengagement ribs 38. In the embodiment, theweight 40 is mounted in theaccommodating space 35 in the frame body in a scarf joint manner, and theweight 40 can also be directly mounted in theaccommodating space 35.

In addition, in the embodiment, theweight 40 is engaged with theframe 30 in a scarf joint manner, and the weight is not easy to slide, as shown in fig. 5, one or twomicro-protrusions 37 are longitudinally arranged on the inner wall surface of thetop wall 31, so that theweight 40 is tightly pressed between the micro-protrusions 37 and the embeddedribs 38, and is not easy to slide, and theweight 40 needs to be pushed to slide. The way to prevent the weight member from sliding is not limited to that shown in the embodiment, for example, a screw is screwed to the weight member from the bottom surface of the weight member, and the end of the screw penetrates through the top surface of the weight member and is tightly pressed to the top wall of the frame, so as to position the weight member.

Thesheet 50 of the present invention is a curtain blade using a blind, and both sides thereof are fitted in thefitting grooves 36 formed on both sides of the frame body, thereby closing the bottom surface of theframe body 30.

In addition, thelower rail 20 further includes: twoend caps 55 are respectively disposed at two ends of theframe 30, as shown in fig. 2 and 6. Referring to fig. 3 and 5, the locking edges 56 on both sides of eachend cap 55 contact the inner wall surfaces of both side walls of theframe 30.

Referring to fig. 7 to 9, thebottom rail 20 of the present invention is used as a bottom rail of awindow blind 60, and awindow blind 60 composed of thebottom rail 20 is shown, and thebottom rail 20 is matched with a window blind with ladder tapes, wherein, besides thebottom rail 20, thewindow blind 60 further has: anupper rail 62, a plurality ofcurtain slats 64 installed between the upper and lower rails and arranged up and down, a plurality ofpull cords 65, and a plurality ofladder tapes 66, please refer to fig. 8 and 9, eachpull cord 65 is inserted through thecurtain slats 64; theladder belts 66 are respectively positioned at two sides of thecurtain vanes 64, and every twoladder belts 66 positioned at different sides form a group of ladder belts, and a plurality ofcross ropes 67 are arranged between the two ladder belts at equal intervals from top to bottom; thecurtain vanes 64 are placed on thecross ropes 67, respectively. A windingadjusting mechanism 69 installed on theupper rail 62, when the windingadjusting mechanism 69 is operated by a user, the pullingrope 65 can be wound or released, so as to raise and lower thelower rail 20 and thecurtain vanes 64, and theladder tapes 66 at two sides of thecurtain vanes 64 can be driven to move up and down, so as to change the shielding angles of the crossingrope 67 and the curtain vanes 64. The structure and operation of the venetian blind 60 are not the main subject of the present invention, and are not described in detail, and the rollingadjustment mechanism 69 of the venetian blind is not limited by the present invention, and various types of rolling adjustment mechanisms are disclosed in the prior art. The invention relates to a blind curtain which is characterized in that a ladder belt/ladder rope and a pull rope of the blind curtain are combined with a lower rail.

Taking the blind 60 with twopull cords 65 and two sets ofladder tapes 66 as an example, referring to fig. 8 and 9, thelower rail 20 is located below theblind slats 64; the bottom ends of the two pullingropes 65 are respectively inserted into theaccommodating space 35 of the frame body from the rope holes 33 of theframe body 30 and fixed to theweight member 40. In this embodiment, the staple 651 fixes the end of thepull cord 65 to the weight. The fixing method of the pullingrope 65 is not limited to this embodiment, and in practice, a hole may be drilled in theweight 40, and the pullingrope 65 may be inserted into the hole and fixed. The bottom ends of the two ladder straps 66 of each set of ladder straps extend into the frame from the side holes 34 in the twoside walls 32 of theframe 30 and are secured to the weight members, such asstaples 661 or other means. The weight member is wooden, and the pull rope and the ladder tape can be quickly nailed on the weight member by the needle, thereby forming the blind 60.

Thesheet material 50 of thelower rail 20 of the invention and thecurtain vanes 64 of the blind 60 are the same vanes, and the color and the material are the same, therefore, the sight can see that the sheet material (vanes) 50 of thelower rail 20 is consistent with thevanes 64 of the curtain from bottom to top, and the integral sense is formed.

Fig. 10 shows a lower rail 20' according to a second preferred embodiment of the present invention, which also comprises: anelongated frame 30, anelongated weight 40, anelongated sheet 50 and twoend caps 55, the structure of the components of the present preferred embodiment is almost the same as that of the first preferred embodiment, and the same structures are denoted by the same reference numerals and will not be described again.

The difference between this embodiment and the first preferred embodiment is the hole shape of the side hole, and the side hole 34' of theside wall 32 of theframe 30 is a through hole for the rope to pass through.

Referring to fig. 11 and 12, the lower rail 20 ' of the present invention is used in a blind 60 ' having ladder cords (not ladder tapes), the blind 60 ' having: anupper rail 62, a plurality ofcurtain vanes 64, a plurality ofpull ropes 65, a plurality ofladder cords 68, a windingadjustment mechanism 69 and the lower rail 20', wherein theladder cords 68 are thinner cords than the ladder tapes. The connection of therope 65 and theladder rope 68 of the window covering 60 'to the lower rail 20' is the same as the first preferred embodiment, that is, the bottom end of eachrope 65 is inserted into the frame body from therope hole 33 of theframe body 30 and fixedly connected with theweight member 40; the bottom end of eachladder cord 68 is threaded into theframe body 30 from a side opening 34' in oneside wall 32 of the frame body and is secured to thecounterweight 40.

Fig. 13 shows alower rail 20 ″ of a third preferred embodiment of the present invention, please refer to fig. 15, in which the lower rail 20' also includes: anelongated frame 30, anelongated weight 40, anelongated sheet 50 and twoend caps 55, the structure of the components of the present preferred embodiment is the same as that of the first preferred embodiment, and the same structures are denoted by the same reference numerals and will not be described again.

The difference between this embodiment and the first preferred embodiment is: theside walls 32 of theframe 30 are not provided with side holes.

Referring to fig. 14 and 15, the lower rail 20' of the present invention is used in awindow blind 60 "having a ladder cord, thewindow blind 60" having: anupper rail 62, a plurality ofcurtain vanes 64, a plurality ofpull cords 65, a plurality ofladder cords 68, a windingadjustment mechanism 69, and thelower rail 20 ". The bottom end of each pullingrope 65 is inserted into the frame body from therope hole 33 of theframe body 30 and is fixedly connected with theweight member 40. The bottom end of eachladder cord 68 passes through the gap between one side of thesheet material 50 and oneside wall 32 of the frame body, and further extends into theaccommodating space 35 of the frame body, and is fixedly connected with theweight member 40. As shown in fig. 15, the bottom end of eachladder cord 68 is plugged into theslot 36 of oneside wall 32 of theframe 30 and enters the frame, specifically, thecord segment 681 of theladder cord 68 is plugged into theslot 36 of the frame and is plugged into the gap between the edge of thesheet 50 and the twostrips 361, so that the bottom end of theladder cord 68 can penetrate into theframe 30 through the gap between one side of thesheet 50 and oneside wall 32, and then theweight 40 is fixedly connected by the staple 682 or other fixing means. Thus, the lower rail 60 'and other components are assembled into the window blind 60'.

Fig. 16 is a cross-sectional view of alower rail 20 according to a fourth preferred embodiment of the present invention, in which the lower rail of the first preferred embodiment is used to illustrate the present embodiment, and the present embodiment further includes: asecond sheet 52, having the same shape and color as thesheet 50 and the same shape and color as the curtain vanes of the window blind, thesecond sheet 52 being placed on thetop wall 31 of theframe 30; at least two throughholes 53 are formed in thesecond sheet 52 and correspond to the rope holes 33, respectively, for inserting the rope into the frame.

Therefore, the sheets (vanes) 50 and 52 on the top and bottom surfaces of thelower rail 20 are matched with the curtain vanes of the window blind, so that the window blind has more integrity. The structure of the preferred embodiment can be applied to any of the above-described preferred embodiments.

The invention provides an innovative structure for the lower rail of the blind, changes the combination mode of the ladder rope, the ladder belt and the pull rope of the blind and the lower rail, and the combination parts of the ladder rope, the ladder belt and the pull rope and the lower rail are all hidden in the lower rail, therefore, the lower rail and the blind are more beautiful without using thefastener 18 shown in figure 1, in addition, thesheets 50 and 52 used by the lower rail are the same as the curtain blades of the blind, have the same color, material and surface effect, and ensure that the whole blind has integrity.

The embodiments disclosed above are merely illustrative of the technical means of the present invention and are not restrictive, and all equivalent modifications of the present invention should be regarded as the protection scope of the present invention. The lower rail and the blind curtain provided by the invention are the original technologies in the technical field, have practical efficacy and are applied by law.

Claims (10)

1. A lower rail of a blind curtain is characterized in that: comprises the following steps:

an elongated frame having a single cross-sectional shape and having a top wall and two side walls; an accommodating space formed between the top wall and the two side walls; at least two rope holes which are arranged on the top wall of the frame body and communicated with the vacant space;

a long counterweight piece which is arranged in the accommodating space;

and the long sheet is arranged on the bottom surface of the frame body, and two sides of the sheet are embedded with the two side walls.

2. The lower rail of a window blind as claimed in claim 1, wherein: at least two side holes are respectively arranged on two sides of the frame body and communicated with the accommodating space.

3. The lower rail of a blind as claimed in claim 1 or 2, wherein: the bottom edges of the two side walls are respectively provided with an embedded groove; two sides of the sheet are respectively embedded in the two embedding grooves.

4. The lower rail of a blind as claimed in claim 1 or 2, wherein: at least one long embedded rib arranged in the accommodating space of the frame body along the longitudinal direction of the frame body; the circumferential surface of the counterweight is provided with at least one embedded part along the longitudinal direction, and the counterweight is embedded and connected with the embedded rib by the embedded part.

5. The lower rail of a window blind as claimed in claim 4, wherein: at least two long embedded ribs are longitudinally arranged on the frame body, each embedded rib is provided with a free end, and the free ends of the two embedded ribs keep intervals and are opposite; two sides of the weight piece are respectively provided with an embedding part, and the two embedding parts are embedded with the free ends of the two embedding ribs.

6. The lower rail of a blind as claimed in claim 1 or 2, wherein: further comprising: a second sheet material, which is placed on the top wall of the frame body; two through holes are arranged on the second sheet material and respectively correspond to the two rope holes.

7. The lower rail of a blind as claimed in claim 1 or 2, wherein: two strip bodies for keeping gaps are arranged on the inner wall surface of each side wall of the frame body along the longitudinal direction of the frame body; each caulking groove is formed between the two strips.

8. The lower rail of a blind as claimed in claim 1 or 2, wherein: the material of the counterweight part is softer than metal.

9. A window blind, characterized in that: comprises the following steps:

a plurality of curtain blades arranged up and down;

a plurality of pull ropes passing through the curtain vanes;

a plurality of ladder ropes respectively arranged at two sides of the curtain blades; and

the lower rail of a blind as claimed in claim 1, which is located below the blind vanes;

the bottom end of each pull rope penetrates into the accommodating space of the frame body from the rope hole on the top wall of the frame body and is connected with the counterweight;

the bottom end of each ladder rope penetrates through a gap between one side of the sheet and one side wall of the frame body and enters the accommodating space to be fixedly connected with the counterweight.

10. A window blind, characterized in that: comprises the following steps:

a plurality of curtain blades arranged up and down;

a plurality of pull ropes passing through the curtain vanes;

a plurality of ladder ropes or ladder belts which are respectively arranged at two sides of the curtain blades; and

a lower rail according to claim 2, which is located below the curtain vanes;

the bottom end of each pull rope penetrates into the accommodating space of the frame body from a rope hole in the top wall of the frame body and is connected with the counterweight;

the bottom end of each ladder rope or ladder belt penetrates into the accommodating space of the frame body from one side hole of one side wall of the frame body and is connected with the counterweight.

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