Limiting device for roll-type curtain

Abstract

The utility model discloses a limit device used for a roll type curtain, which comprises a placing box, a rotating wheel, a first limit piece, a screw cap, a screw rod and a second limit piece, the placing box is rotatably connected with the rotating wheel, one end of the screw rod is connected with the rotating wheel, the other end of the screw rod is connected with the second limit piece, the screw cap is rotatably arranged on the screw rod, and the screw cap is rotatably arranged on the screw rod. The nut is located between the rotating wheel and the second limiting piece, the first limiting piece is movably inserted into the containing box, and the first limiting piece is connected with the rotating wheel in a clamped mode during limiting. The utility model belongs to the technical field of curtains. The technical effects are achieved as follows: through the arrangement that the first limiting piece is movably inserted into the placement box, when the receiving and sending of the curtain need to be limited, only the first limiting piece needs to be inserted into the movable wheel to be clamped with the movable wheel, other tools are not needed, and the receiving and sending of the curtain are limited very conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of curtains, in particular to a limiting device for rolling curtains. Background Art

[0002] Two Chinese patents with patent notification numbers CN204200060U and CN203756006U both disclose rolling curtain stoppers. Although the structures of both patents achieve the limit of curtain transmission and reception, the curtain stoppers in both patents are adjusted axially from the curtain stopper, and the axial reserved space of the curtain is limited when it is installed, which is not convenient for adjusting the curtain stopper. In particular, when two sets of curtains are installed and used in combination, the two sets of curtain cords are usually placed symmetrically, which causes the curtain stoppers of the two sets of curtains to be located in the middle, that is, the two curtain stoppers are very close, which makes it more difficult to operate the curtain stoppers. In addition, the curtain stoppers in both patents require additional tools to achieve adjustment, which is very inconvenient to use. Utility Model Content

[0003] To this end, the utility model provides a limiting device for a rolling curtain to solve the above-mentioned problems in the prior art.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] According to the first aspect of the utility model, a limiting device for a roll-up curtain comprises a placement box, a rotating wheel, a first limiting piece, a nut, a screw and a second limiting piece, the placement box is rotatably connected to the rotating wheel, one end of the screw is connected to the rotating wheel, and the other end of the screw is connected to the second limiting piece, the nut is rotatably arranged on the screw, the nut is located between the rotating wheel and the second limiting piece, and the first limiting piece is movably inserted into the placement box, and when limiting, the first limiting piece is clamped with the rotating wheel.

[0006] Furthermore, the rotating wheel includes a wheel body, gear teeth and an inner sleeve, the first limit member includes a limit member body and a latch tooth, the wheel body is rotatably connected in the placement box, one end of the inner sleeve is connected to the surface of the wheel body, one end of the screw rod facing away from the second limit member is inserted on the inner sleeve, a plurality of gear teeth are evenly spaced on the outer peripheral side of the wheel body, a plurality of latch teeth are arranged on one end of the limit member body, the limit member body is movably inserted on the placement box, and when limiting, the latch tooth is engaged with the gear teeth, and the nut is located between the inner sleeve and the second limit member.

[0007] Furthermore, the placement box includes an upper cover and a lower cover, the upper cover and the lower cover are connected to each other, the rotating wheel is rotatably connected to the lower cover, the rotating wheel is located between the lower cover and the upper cover, and the inner sleeve passes through the upper cover and is rotatably connected.

[0008] Furthermore, an upper connecting block is arranged on the surface of the upper cover, an insertion hole is opened on the upper connecting block, a side of the upper connecting block facing away from the upper cover is fitted with the lower cover, and the limiting member body is movably inserted in the insertion hole.

[0009] Furthermore, two blocks are provided on the side of the upper connecting block facing away from the upper cover, and the two blocks are respectively located on the two side walls of the insertion hole. The first limiting member also includes a return tooth, and the side surfaces of the latch teeth at both ends are provided with a return tooth. A bayonet and a transition port are provided on the upper cover, and the bayonet and the transition port are both located above the block, and the bayonet and the transition port are connected to each other. The width of the transition port is smaller than the width of the bayonet. When limiting, the return tooth abuts against the step formed by the bayonet and the transition port.

[0010] Furthermore, an inner slot is opened in the inner sleeve, and the screw includes a rod body, a block and a connecting part. One end of the rod body is connected to the block, and the other end of the rod body is connected to the connecting part. The block is inserted in the inner slot, the block is engaged with the second limit piece, and the nut is rotatably set on the rod body.

[0011] Furthermore, the lower cover includes a cover body, an inner shaft portion and a lower connecting block. The inner shaft portion is arranged at the center of the surface of the cover body. A plurality of lower connecting blocks are also arranged on the surface of the cover body. The plurality of lower connecting blocks are correspondingly abutted against the upper connecting blocks. The wheel body is rotatably mounted on the inner shaft portion.

[0012] Furthermore, it also includes an outer sleeve and a fixing piece. The surface of the upper cover facing away from the lower cover is provided with an outer sleeve, the outer sleeve is sleeved on the inner sleeve, the fixing piece is sleeved on the outer sleeve and the end of the fixing piece is connected to the upper cover.

[0013] Furthermore, the fixing member includes a fixing tube, a tube bottom plate and connecting ribs. The fixing tube and the tube bottom plate are both mounted on the outer tube. The fixing tube and the tube bottom plate are connected by the connecting ribs. The fixing tube is connected to the upper cover via the tube bottom plate.

[0014] Furthermore, the outer sleeve includes a sleeve body and a boss. The sleeve body is sleeved on the outer circumference of the inner sleeve. One end of the sleeve body is connected to the upper cover. The other end of the sleeve body is provided with a boss. The boss is sleeved on the rod body, and the nut is provided between the boss and the second limit member.

[0015] The utility model has the following advantages: by movably inserting the first limiting member on the placement box, when it is necessary to limit the sending and receiving of the curtain, it is only necessary to insert the first limiting member until it is engaged with the movable wheel, without the need for other tools, and it is very convenient to limit the sending and receiving of the curtain. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0017] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed by the present utility model.

[0018] Figure 1 It is the general assembly drawing of a limiting device for a roller curtain provided by some embodiments of the present utility model.

[0019] Figure 2 It is the sectional view of a limiting device for a roller curtain provided by some embodiments of the present utility model.

[0020] Figure 3 It is one of the partial structure diagrams of a limiting device for a roller curtain provided by some embodiments of the present utility model.

[0021] Figure 4 It is the second of the partial structure diagrams of a limiting device for a roller curtain provided by some embodiments of the present utility model.

[0022] Figure 5 It is the third of the partial structure diagrams of a limiting device for a roller curtain provided by some embodiments of the present utility model.

[0023] Figure 6 It is the three-dimensional view of the screw of a limiting device for a roller curtain provided by some embodiments of the present utility model.

[0024] Figure 7 It is the structure diagram of the first limiting member of a limiting device for a roller curtain provided by some embodiments of the present utility model.

[0025] Figure 8 It is the three-dimensional view of the lower cover of a limiting device for a roller curtain provided by some embodiments of the present utility model.

[0026] Figure 9 It is the three-dimensional view of the fixing member of a limiting device for a roller curtain provided by some embodiments of the present utility model.

[0027] In the figure: 1. Placing box, 11. Lower cover, 111. Cover body 1, 112. Inner shaft part, 113. Lower connecting block, 12. Upper cover, 121. Upper connecting block, 122. Stopper, 123. Bayonet, 124. Insertion hole, 125. Transition port, 2. Rotating wheel, 21. Wheel body, 22. Teeth, 23. Inner sleeve, 24. Inner card slot, 3. First limiting member, 31. Limiting member body, 32. Card teeth, 33. Return stop teeth, 34. Stop edge, 4. Fixing member, 41. Fixing cylinder, 42. Cylinder bottom plate, 43. Connecting rib, 5. Second limiting member, 6. Nut, 7. Screw rod, 71. Rod body part, 72. Clamping block, 73. Connecting part, 8. Outer sleeve, 81. Sleeve body, 82. Boss. Specific embodiments

[0028] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0029] As Figures 1 to 9 shown, a limiting device for a roll-up curtain in the first aspect embodiment of the present utility model includes a placing box 1, a rotating wheel 2, a first limiting member 3, a nut 6, a screw rod 7 and a second limiting member 5. The rotating wheel 2 is rotatably connected to the placing box 1. One end of the screw rod 7 is connected to the rotating wheel 2, and the other end of the screw rod 7 is connected to the second limiting member 5. The nut 6 is rotatably arranged on the screw rod 7, and the nut 6 is located between the rotating wheel 2 and the second limiting member 5. The first limiting member 3 is movably inserted into the placing box 1. When limiting, the first limiting member 3 is clamped with the rotating wheel 2.

[0030] In the above embodiment, it should be noted that the nut 6 and the screw rod 7 are connected in a manner of screw-nut cooperation.

[0031] The technical effect achieved by the above embodiment is that by arranging the first limiting member 3 to be movably inserted into the placing box 1, when it is necessary to limit the receiving and sending of the curtain, it is only necessary to insert the first limiting member 3 into the clamping connection with the moving wheel 2, without the need to use other tools, and it is very convenient to limit the receiving and sending of the curtain.

[0032] Optionally, as Figures 1 to 9As shown, in some embodiments, the rotating wheel 2 includes a wheel body 21, teeth 22, and an inner sleeve 23. The first limiting member 3 includes a limiting member body 31 and engaging teeth 32. The wheel body 21 is rotatably connected within the placement box 1. One end of the inner sleeve 23 is connected to the surface of the wheel body 21. The end of the screw 7 facing away from the second limiting member 5 is inserted onto the inner sleeve 23. A plurality of teeth 22 are equidistantly arranged on the outer peripheral side of the wheel body 21. A plurality of engaging teeth 32 are arranged at one end of the limiting member body 31. The limiting member body 31 is movably inserted onto the placement box 1. During limiting, the engaging teeth 32 engage with the teeth 22, and the nut 6 is located between the inner sleeve 23 and the second limiting member 5;

[0033] An inner card slot 24 is formed within the inner sleeve 23. The screw 7 includes a rod body portion 71, a locking block 72, and a connecting portion 73. A locking block 72 is connected to one end of the rod body portion 71, and a connecting portion 73 is connected to the other end of the rod body portion 71. The locking block 72 is inserted within the inner card slot 24. The locking block 72 is clamped with the second limiting member 5, and the nut 6 is rotatably arranged on the rod body portion 71.

[0034] In the above-mentioned optional embodiments, it should be noted that the cross-section of the inner card slot 24 is a polygonal structure. Preferably, the cross-section of the inner card slot 24 is a quadrilateral, pentagon, hexagon, heptagon, or octagon. The locking block 72 is a polygonal prism structure, and the cross-section of the locking block 72 is the same as that of the inner card slot 24.

[0035] The beneficial effects of the above-mentioned optional embodiments are as follows: The reliable limiting of the rotation of the wheel body 21 is achieved through the arrangement of the engaging teeth 32, and thus the reliable limiting of the receiving and sending of the curtain is realized. Through the cooperative arrangement of the inner card slot 24 and the inner sleeve 23, when the rotating wheel 2 rotates, it can drive the screw 7 to rotate, thereby driving the up and down movement of the nut 6 and further driving the receiving and sending of the curtain.

[0036] Optionally, as Figures 1 to 9 shown, in some embodiments, the placement box 1 includes an upper cover 12 and a lower cover 11. The upper cover 12 and the lower cover 11 are connected to each other. The rotating wheel 2 is rotatably connected to the lower cover 11. The rotating wheel 2 is located between the lower cover 11 and the upper cover 12. The inner sleeve 23 passes through the upper cover 12 and is connected to the rotating wheel 2.

[0037] An upper connecting block 121 is arranged on the surface of the upper cover 12. An insertion hole 124 is formed in the upper connecting block 121. The side of the upper connecting block 121 facing away from the upper cover 12 is attached to the lower cover 11. The limiting member body 31 is movably inserted into the insertion hole 124;

[0038] On the side of the upper connecting block 121 facing away from the upper cover 12, there are two stoppers 122, and the two stoppers 122 are respectively located on the two side walls of the insertion hole 124. The first limiting member 3 further includes a return stop tooth 33, and the return stop teeth 33 are arranged on the sides of the engaging teeth 32 at both ends. On the upper cover 12, there are a bayonet 123 and a transition port 125. Both the bayonet 123 and the transition port 125 are located above the stopper 122, and the bayonet 123 and the transition port 125 communicate with each other. The width of the transition port 125 is smaller than the width of the bayonet 123. When limiting, the return stop tooth 33 abuts against the step formed by the bayonet 123 and the transition port 125;

[0039] The lower cover 11 includes a cover body 111, an inner shaft portion 112, and a lower connecting block 113. The inner shaft portion 112 is provided at the center of the surface of the cover body 111. The surface of the cover body 111 is also provided with a plurality of lower connecting blocks 113, and the plurality of lower connecting blocks 113 correspondingly abut against the upper connecting block 121. The wheel body 21 is rotatably sleeved on the inner shaft portion 112.

[0040] In the above optional embodiment, it should be noted that a retaining edge 34 is further provided on the surface of the first limiting member 3. When limiting, the retaining edge 34 abuts against the outer side wall of the stopper 122; the upper cover 12 and the lower cover 11 are connected by screws. Specifically, a threaded hole is provided on the lower connecting block 113, a through hole is provided on the upper cover 12, and a through hole is provided on the upper connecting block 121. The through hole and the through hole communicate with each other. The screw passes through the through hole and the through hole and is threadedly connected to the threaded hole. The return stop tooth 33 is in an arc shape;

[0041] During use, the nut 6 is fixed on the rotating shaft of the roller-type curtain, and then by rotating the rotating wheel 2, the position of the nut 11 on the screw rod 7 is changed, so as to change the position of the curtain fabric. After adjustment, only need to manually slide the first limiting member 3 forward and insert it to the position where the engaging teeth 32 and the gear teeth 22 are engaged, so that the rotating wheel 2 loses the ability to rotate, so that the screw rod 7 is in a limited state, realizing the limitation of the curtain position;

[0042] After limiting, since the return stop tooth 33 abuts against the step formed by the bayonet 123 and the transition port 125, the matching setting of the retaining edge 34 abutting against the outer side wall of the stopper 122 realizes the front-back limitation of the first limiting member 3, avoiding the first limiting member 3 from coming out and at the same time avoiding the first limiting member 3 from being inserted excessively. The reliable sliding of the first limiting member 3 is realized through the cooperation of the stopper 122 and the transition port 125.

[0043] The beneficial effect of the above optional embodiment is that: through the matching setting of the return stop tooth 33, the bayonet 123, the transition port 125 and the stopper 122, the reliable front-back sliding of the first limiting member 3 is realized while the reliable limitation of the curtain is realized.

[0044] Optionally, as Figures 1 to 9As shown, in some embodiments, it further includes an outer sleeve 8 and a fixing member 4. An outer sleeve 8 is provided on the surface of the upper cover 12 facing away from the lower cover 11. The outer sleeve 8 is sleeved on the inner sleeve 23, and the fixing member 4 is sleeved on the outer sleeve 8 and the end of the fixing member 4 is connected to the upper cover 12;

[0045] The fixing member 4 includes a fixing cylinder 41, a cylinder bottom plate 42 and a connecting rib 43. Both the fixing cylinder 41 and the cylinder bottom plate 42 are sleeved on the outer sleeve 8. The fixing cylinder 41 and the cylinder bottom plate 42 are connected by the connecting rib 43, and the fixing cylinder 41 is connected to the upper cover 12 through the cylinder bottom plate 42;

[0046] The outer sleeve 8 includes a cylinder body 81 and a boss 82. The cylinder body 81 is sleeved on the outer periphery of the inner sleeve 23. One end of the cylinder body 81 is connected to the upper cover 12. A boss 82 is provided at the other end of the cylinder body 81. The boss 82 is sleeved on the rod body portion 71, and the nut 6 is arranged between the boss 82 and the second limiting member 5.

[0047] In the above optional embodiments, it should be noted that the inner diameter of the boss 82 is equal to the pitch circle diameter of the clamping block 72 and the inner diameter of the frustum 82 is smaller than the outer diameter of the inner sleeve 23.

[0048] The beneficial effects of the above optional embodiments are as follows: The further limitation of the inner sleeve 23 is realized through the setting of the boss 82 while preventing the screw rod 7 from coming out; the strength and stability of the device are ensured through the settings of the fixing cylinder 41, the cylinder bottom plate 42 and the connecting rib 43.

[0049] Although the present invention has been described in detail above with general descriptions and specific embodiments, on the basis of the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

[0050] Terms such as "upper", "lower", "left", "right", "middle" and the like cited in this specification are only for the convenience of clear narration, rather than used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationship, without substantial change in technical content, should also be regarded as the scope of implementation of the present invention.

Claims

1. A limit device for a roller curtain, characterized in that, It includes a placement box (1), a rotating wheel (2), a first limiting member (3), a nut (6), a screw rod (7) and a second limiting member (5). The rotating wheel (2) is rotatably connected to the placement box (1). One end of the screw rod (7) is connected to the rotating wheel (2), and the other end of the screw rod (7) is connected to the second limiting member (5). The nut (6) is rotatably arranged on the screw rod (7), and the nut (6) is located between the rotating wheel (2) and the second limiting member (5). The first limiting member (3) is movably inserted into the placement box (1). When in limiting, the first limiting member (3) is engaged with the rotating wheel (2). The rotating wheel (2) includes a wheel body (21), wheel teeth (22) and an inner sleeve (23). The first limiting member (3) includes a limiting member body (31) and engaging teeth (32). The wheel body (21) is rotatably connected inside the placement box (1). One end of the inner sleeve (23) is connected to the surface of the wheel body (21). The end of the screw rod (7) facing away from the second limiting member (5) is inserted into the inner sleeve (23). A plurality of the wheel teeth (22) are equidistantly arranged on the outer peripheral side of the wheel body (21). A plurality of the engaging teeth (32) are arranged at one end of the limiting member body (31). The limiting member body (31) is movably inserted into the placement box (1). When in limiting, the engaging teeth (32) are engaged with the wheel teeth (22). The nut (6) is located between the inner sleeve (23) and the second limiting member (5). The placement box (1) includes an upper cover (12) and a lower cover (11). The upper cover (12) and the lower cover (11) are connected to each other. The rotating wheel (2) is rotatably connected to the lower cover (11). The rotating wheel (2) is located between the lower cover (11) and the upper cover (12). The inner sleeve (23) passes through the upper cover (12) and is connected to the rotating wheel (2). An upper connecting block (121) is arranged on the surface of the upper cover (12). An insertion hole (124) is formed in the upper connecting block (121). The side of the upper connecting block (121) facing away from the upper cover (12) is attached to the lower cover (11). The limiting member body (31) is movably inserted into the insertion hole (124). Two blocking blocks (122) are arranged on the side of the upper connecting block (121) facing away from the upper cover (12). The two blocking blocks (122) are respectively located on two side walls of the insertion hole (124). The first limiting member (3) further includes return blocking teeth (33). The return blocking teeth (33) are arranged on the sides of the engaging teeth (32) at both ends. A bayonet (123) and a transition port (125) are formed in the upper cover (12). Both the bayonet (123) and the transition port (125) are located above the blocking blocks (122). The bayonet (123) and the transition port (125) are communicated with each other. The width of the transition port (125) is smaller than the width of the bayonet (123). When in limiting,The reverse gear tooth (33) abuts against the step formed by the bayonet (123) and the transition port (125).

2. The limit device for a roller blind according to claim 1, characterized in that, An inner slot (24) is provided in the inner sleeve (23); the screw rod (7) comprises a rod body (71), a block (72) and a connecting portion (73); one end of the rod body (71) is connected to the block (72); the other end of the rod body (71) is connected to the connecting portion (73); the block (72) is inserted into the inner slot (24); the block (72) is engaged with the second limiting member (5); and the nut (6) is rotatably arranged on the rod body (71).

3. The limit device for a roller blind according to claim 2, characterized in that, The lower cover (11) comprises a cover body (111), an inner shaft portion (112) and a lower connecting block (113); the inner shaft portion (112) is arranged at the center of the surface of the cover body (111); a plurality of lower connecting blocks (113) are also arranged on the surface of the cover body (111); the plurality of lower connecting blocks (113) are correspondingly abutted against the upper connecting block (121); and the wheel body (21) is rotatably sleeved on the inner shaft portion (112).

4. The limit device for a roller blind according to claim 3, characterized in that, It also comprises an outer sleeve (8) and a fixing member (4); the outer sleeve (8) is arranged on the surface of the upper cover (12) facing away from the lower cover (11); the outer sleeve (8) is sleeved on the inner sleeve (23); the fixing member (4) is sleeved on the outer sleeve (8) and the end of the fixing member (4) is connected to the upper cover (12).

5. The limiting device for a roller curtain according to claim 4, characterized in that, The fixing member (4) comprises a fixing tube (41), a tube bottom plate (42) and a connecting rib (43); the fixing tube (41) and the tube bottom plate (42) are both sleeved on the outer tube (8); the fixing tube (41) and the tube bottom plate (42) are connected via the connecting rib (43); and the fixing tube (41) is connected to the upper cover (12) via the tube bottom plate (42).

6. The limit device for a roller blind according to claim 5, characterized in that, The outer sleeve (8) comprises a sleeve body (81) and a boss (82), wherein the sleeve body (81) is sleeved on the outer circumference of the inner sleeve (23), one end of the sleeve body (81) is connected to the upper cover (12), and the other end of the sleeve body (81) is provided with the boss (82), wherein the boss (82) is sleeved on the rod body (71), and the nut (6) is provided between the boss (82) and the second limiting member (5).

Images