Dual-system controlled horizontal curtain limiter

Abstract

Disclosed in the present utility model is a dual-system controlled horizontal curtain limiter. The key points of the technical solution are that: the dual-system controlled horizontal curtain limiter comprises a limiter body, which is arranged in a horizontal curtain, is fitted with two rotatable transmission rods in the horizontal curtain, and comprises a base, wherein a limiting box A and a limiting box B, both of which are in sliding fit with the base, and a fixed screw are provided on the base; a connecting gear and a nut gear, which are in linkage, are provided in each of the limiting box A and the limiting box B; the connecting gear is provided, at the middle thereof, with a locking member clamped therewith; and a fitting hole allowing the transmission rod to pass therethrough is provided at the middle of the locking member. Synchronous rotation of the transmission rod and the connecting gear is achieved by means of the locking member. A threaded hole is provided in the middle of the nut gear, and threaded fit of the nut gear and the screw is achieved by means of the threaded hole. The present utility model is simple to mount and adjust, and the occupied width thereby is reduced, such that a narrower curtain can be made, thereby facilitating miniaturization.

Description

A horizontal curtain limiter of double-system control TECHNICAL FIELD

[0001] The utility model relates to a horizontal curtain limiter of double-system control. BACKGROUND

[0002] The horizontal curtain of double-system control is controlled by two systems to control two lower beams to achieve different adjustment of the curtain. The control system includes a transmission rod, a rope winding pipe, a motor or a head to drive the transmission rod and drive the rope winding pipe to wind the rope, and the lifting of the lower beam is controlled by the rope. Since it is double-system control, in order to prevent the collision of the two lower beams during lifting adjustment and to stop in time when the lower beam reaches the limit position, a limiter needs to be set in the system to limit the rotation of the transmission rod inside the curtain. The traditional limiter generally sets a screw rod that rotates synchronously with the transmission rod, and cooperates with the nut on the screw rod to convert the rotation of the transmission rod into the linear motion of the nut, and the limit is achieved by limiting the linear movement distance of the nut.

[0003] When applied to double systems, two sets of screw rods and nuts need to be set, and the position of the nut in the two sets of screw rods and nuts needs to be adjusted to enable the two nuts in the limiter to stop in time when the two lower beams are about to collide, preventing the collision of the lower beams. However, the nut in the traditional screw rod and nut needs to rely on the rotation of the screw rod to move, and cannot be conveniently adjusted on the screw rod, which makes the adjustment of the linkage position of the nut in the two sets of screw rods and nuts more troublesome when applied to double systems. At the same time, the two screw rods need to rotate synchronously with the corresponding transmission rods, which results in a larger width size of the limiter, which is not conducive to miniaturization. TECHNICAL SOLUTION

[0004] In view of the deficiencies in the prior art, the utility model provides a horizontal curtain limiter of double-system control, which is simple to install and adjust, has a reduced width, can be used for narrower curtains, and is conducive to miniaturization.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a horizontal curtain limiter of double-system control, comprising a limiter body, the limiter body is arranged in the horizontal curtain, and is matched with two rotatable transmission rods in the horizontal curtain, the limiter body comprises a base, the base is provided with a fixed screw rod and a limiting box A and a limiting box B in sliding cooperation with the base, the limiting box A and the limiting box B are provided with a connecting gear and a nut gear in linkage, the connecting gear is provided with a lock catch in the middle and connected with the connecting gear, the lock catch is fixed with the transmission rod in the circumferential direction and can slide in the axial direction, and the nut gear is in thread cooperation with the screw rod.

[0006] The utility model further sets up: the lock catch spare middle part is equipped with the cooperation hole that supplies transmission rod to pass, through the lock catch realizes transmission rod and the synchronous rotation of connecting gear, the nut gear middle part is equipped with the threaded hole, realizes the nut gear and the threaded cooperation of screw rod through the threaded hole.

[0007] The utility model further sets up: the nut gear is equipped with the locking portion that protrudes along the axial direction both ends, the locking portion of two nut gears in the limit box A and the limit box B is opposite and adapts, the both ends of base are equipped with two locking blocks correspondingly, the locking block adapts with the locking portion.

[0008] The utility model further sets up: the connecting gear is equipped with the protruding connecting arm, the lock catch spare is equipped with the notch that adapts with the connecting arm, the connecting arm can extend into the notch and realizes the synchronous rotation of both.

[0009] The utility model further sets up: the end of connecting arm is equipped with the dog, when the connecting arm extends into the notch, the dog is engaged with the outer end surface of the notch.

[0010] The utility model further sets up: the connecting arm is equipped with two, the notch annular symmetry is equipped with four.

[0011] The utility model further sets up: the linkage of connecting gear and nut gear is direct engagement or sets up and is engaged with the transition gear of connecting gear and nut gear, makes connecting gear and nut gear linkage through the transition gear.

[0012] The utility model further sets up: the both ends of base are equipped with the fixed groove and the pressing block, the fixed groove is equipped with the screw surface that adapts with screw rod, and the screw rod is fixedly arranged between the fixed groove and the pressing block. Beneficial effects

[0013] Compared with the prior art, the utility model sets up the fixed screw rod, simultaneously, limit box A and limit box B are linked through connecting gear and corresponding transmission rod, then cooperate nut gear to make limit box A and limit box B move on the fixed screw rod, compared with the traditional two screw rods to control, the utility model limit box A and limit box B share a screw rod, and the screw rod is fixed, and the structure is simpler, and the width of the limit stopper can be effectively reduced, and the curtain can be made narrower.

[0014] Meanwhile, the lock piece is arranged, when the notch on the lock piece is separated from the connecting arm, the rotation of the transmission rod cannot drive the rotation of the connecting gear, so that the position of the lower beam can be adjusted flexibly, the transmission rod can be flexibly rotated and adjusted, when the adjustment is completed, the lock piece is clamped into the connecting arm, and the position limiter can normally work, the installation and adjustment of the position limiter are more convenient and fast, and the position limiter is especially suitable for double-system curtains. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a schematic diagram of the whole window curtain of the embodiment;

[0016] Fig. 2 is a schematic diagram of the internal structure of the whole window curtain of the embodiment;

[0017] Fig. 3 is a schematic diagram of the structure of the position limiter of the embodiment;

[0018] Fig. 4 is a schematic diagram of the enlarged structure of the locking block of the embodiment;

[0019] Fig. 5 is a schematic diagram of the structure of the two position boxes of the embodiment;

[0020] Fig. 6 is a schematic diagram of the cooperation structure of the connecting gear and the nut gear of the first embodiment;

[0021] Fig. 7 is a schematic diagram of the cooperation structure of the connecting gear and the nut gear of the second embodiment;

[0022] Fig. 8 is an exploded schematic diagram of the fixing structure of the screw rod of the embodiment.

[0023] Fig. 1 is a schematic diagram of the whole window curtain of the embodiment; Fig. 2 is a schematic diagram of the internal structure of the whole window curtain of the embodiment; Fig. 3 is a schematic diagram of the structure of the position limiter of the embodiment; Fig. 4 is a schematic diagram of the enlarged structure of the locking block of the embodiment; Fig. 5 is a schematic diagram of the structure of the two position boxes of the embodiment; Fig. 6 is a schematic diagram of the cooperation structure of the connecting gear and the nut gear of the first embodiment; Fig. 7 is a schematic diagram of the cooperation structure of the connecting gear and the nut gear of the second embodiment; Fig. 8 is an exploded schematic diagram of the fixing structure of the screw rod of the embodiment. Embodiment of the utility model

[0024] The utility model will be further explained in detail in combination with the drawings.

[0025] The embodiment discloses a horizontal type curtain position limiter of double-system control, as shown in figures 1-7, comprising a position limiter body 1, the position limiter body 1 is arranged in the horizontal type curtain 11, and is matched with two rotatable transmission rods 9 in the horizontal type curtain 11, can refer to figure 2, the function of the two transmission rods 9 is to drive the rope pipe to wind the rope, so that the two lower beams of the curtain are lifted;The position limiter of the embodiment is used for limiting the rotation amount of the transmission rod 9, to ensure that the two lower beams can be stopped in time after reaching the limit position, and prevent the two lower beams from colliding.

[0026] Specifically, referring to FIG. 3, the position limiter body 1 comprises a base 101, a fixed screw rod 2 and a position limiter box A 3 and a position limiter box B 4 which are in sliding cooperation with the base 101 are arranged on the base 101, the position limiter box A 3 and the position limiter box B 4 are both provided with a connecting gear 5 and a nut gear 6 which are in linkage, the connecting gear 5 is provided with a locking piece 7 which is in clamping connection with the connecting gear 5, the locking piece 7 is provided with a matching hole 701 through which a transmission rod passes, and the transmission rod and the connecting gear 5 are in synchronous rotation through the locking piece 7; the nut gear 6 is provided with a threaded hole 601 in the middle, and the nut gear 6 and the screw rod 2 are in threaded cooperation through the threaded hole 601. Through the above structure, the embodiment adopts a fixed screw rod 2, and the position limiter box A 3 and the position limiter box B 4 use the screw rod 2 together, and the screw rod 2 is fixed on the base 101, which avoids the need to give a width allowance due to the rotation offset of the screw rod, and compared with the original two screw rods, the embodiment is more space-saving in structure and is suitable for narrower curtains.

[0027] Further, the rotation of the transmission rod 9 is converted into the linear sliding of the position limiter box A 3 and the position limiter box B 4 through the cooperation of the connecting gear 5 and the nut gear 6, and the locking piece 7 is arranged. Since the locking pieces 7 of the position limiter box A and the position limiter box B are symmetrical and identical in structure, the locking piece 7 of the position limiter box A is taken as an example for description in the drawings. When the locking piece 7 is not clamped into the connecting gear 5, the position limiter box A is not linked with the transmission rod, and the transmission rod can be directly adjusted in rotation, that is, the position of the lower beam is adjusted. After the adjustment is completed, the locking piece 7 is clamped in, and the position limiter box A and the position limiter box B can normally work in linkage with the transmission rod. Therefore, when the embodiment is applied to a horizontal curtain controlled by a double system, the position of the two lower beams can be adjusted by rotating the transmission rod first, at this time, the locking pieces of the position limiter box A and the position limiter box B are not clamped in, and the two position limiters will not move. After the position of the lower beam is adjusted, the locking piece 7 is clamped in. When the embodiment is applied to a horizontal curtain controlled by a double system, the installation and adjustment are more convenient.

[0028] Further, referring to FIGS. 4-5, the nut gear 6 is provided with a locking portion 602 which protrudes from both ends in the axial direction, and the locking portions 602 of the two nut gears 6 in the position limiter box A 3 and the position limiter box B 4 are opposite and matched; two locking blocks 8 are arranged on both ends of the base 101 correspondingly, and the locking blocks 8 are matched with the locking portions 602. In order to avoid direct collision between the position limiter box A 3, the position limiter box B 4 and the base 101, the abutment between the protruding locking portion 602 and the locking block 8 is arranged to achieve limiting. As shown in FIG. 4, at this time, the position limiter box A and the position limiter box B are in the extreme positions on both sides, the locking block 8 abuts against the locking portion 602, and the nut gear 6 cannot rotate any more, thereby achieving limiting. Referring to FIG. 5, at this time, the position limiter box A and the position limiter box B are in the closest extreme positions, the locking portions 602 of the two nut gears 6 in the position limiter box A and the position limiter box B abut against each other to limit, thereby preventing direct collision between the two position limiters.

[0029] Further, referring to FIG. 8, in order to ensure the stable fixation of the screw rod 2 and the accurate matching of the locking block 8 and the locking portion 602, the embodiment preferably provides a fixing groove 21 and a pressing block 22 at both ends of the base 101, the fixing groove 21 is provided with a threaded surface 2101 matched with the screw rod 2, and the screw rod 2 is fixedly arranged between the fixing groove 21 and the pressing block 22. Through the above structure, the screw rod 2 is matched with the threaded surface 2101 in the fixing groove 21, and then the pressing block 22 presses the screw rod, so that the screw rod 2 is stably fixed and cannot rotate, and the accurate abutting matching of the locking block 8 and the locking portion 602 is ensured. If the screw rod is simply pressed and fixed by friction, the screw rod 2 is easy to rotate and deviate after long-term use, which causes the locking block 8 and the locking portion 602 to deviate and cannot accurately abut and match, thereby affecting the reliable use of the limit stopper.

[0030] Further, referring to FIG. 3, the connecting gear 5 is provided with a protruding connecting arm 501, the locking piece 7 is provided with a notch 702 matched with the connecting arm 501, and the connecting arm 501 can extend into the notch 702 and realize the synchronous rotation of the two. As a preferred, the end of the connecting arm 501 is provided with a clamping jaw 5011, which is clamped with the outer end surface of the notch 702 after the connecting arm 501 extends into the notch 702. Through the above structure, the connecting arm 501 on the connecting gear 5 is connected with the locking piece 7, which is simple and reliable in structure and stable in transmission.

[0031] Further, as a preferred, the connecting arm 501 is symmetrically provided with two, and the notch 702 is annularly and symmetrically provided with four. The provision of two connecting arms 501 facilitates disassembly and assembly, and the provision of four notches 702 can have more angular positions matched with the connecting arm 501, thereby facilitating the clamping installation between the two.

[0032] Further, the linkage between the connecting gear 5 and the nut gear 6 has two embodiments. Embodiment one is to provide a transition gear 56 between the connecting gear 5 and the nut gear 6, and to link the two gears through the transition gear 56. Embodiment one can more easily realize the adjustment of the speed ratio, and the provision of the transition gear 56 can change the center distance between the gears, thereby increasing the flexibility of the layout design. At the same time, the transition gear can change the transmission direction of force or movement, thereby facilitating the cooperation with the driving mechanism 10 with different rotating directions and speeds. Embodiment two is that the two gears are directly engaged. The structure of direct engagement is simpler and more compact in size, and therefore the linkage mode of the two gears can be selected according to real-time needs. For example, when applied to two driving mechanisms 10 driving two transmission rods with different rotating directions, one limit box can adopt embodiment one and the other limit box can adopt embodiment two, thereby better matching the transmission rods 9 with different rotating directions. Therefore, embodiment one and embodiment two can be used alone or in combination, thereby having wider adaptability.

[0033] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the design concept of the present application shall be included in the protection scope of the present application.

Claims

1. A dual-system controlled horizontal curtain limiter, comprising a limiter body (1), wherein the limiter body (1) is disposed inside the horizontal curtain and cooperates with two rotatable transmission rods inside the horizontal curtain, characterized in that: The position limiter body (1) comprises a base (101), the base (101) is provided with a fixed screw rod (2) and a position limiting box A (3) and a position limiting box B (4) which are in sliding fit with the base (101), the position limiting box A (3) and the position limiting box B (4) are provided with a connecting gear (5) and a nut gear (6) which are linked, the middle part of the connecting gear (5) is provided with a lock catch (7) which is connected with the connecting gear (5), the lock catch (7) is fixed in the circumferential direction and can slide in the axial direction, and the nut gear (6) is in threaded fit with the screw rod (2).

2. A dual system controlled horizontal curtain positioner as claimed in claim 1, wherein: The middle part of the lock catch (7) is provided with a matching hole (701) through which the transmission rod passes, and the lock catch (7) is used to realize the synchronous rotation of the transmission rod and the connecting gear (5); the middle part of the nut gear (6) is provided with a threaded hole (601), and the nut gear (6) is in threaded fit with the screw rod (2) through the threaded hole (601).

3. A dual system controlled horizontal curtain positioner as claimed in claim 1, wherein: The nut gear (6) is provided with a locking part (602) protruding in the axial direction, the locking parts (602) of the two nut gears (6) in the position limiting box A (3) and the position limiting box B (4) are matched, and the two ends of the base (101) are provided with two locking blocks (8) which are matched with the locking parts (602).

4. A dual system controlled horizontal curtain positioner as claimed in claim 1, wherein: The connecting gear (5) is provided with a protruding connecting arm (501), the lock catch (7) is provided with a notch (702) matched with the connecting arm (501), and the connecting arm (501) can extend into the notch (702) and realize the synchronous rotation of the two.

5. A dual system controlled horizontal curtain positioner as claimed in claim 4, wherein: The end of the connecting arm (501) is provided with a pawl (5011), when the connecting arm (501) extends into the notch (702), the pawl (5011) is clamped with the outer end face of the notch (702).

6. A dual system controlled horizontal curtain positioner according to claim 4 or 5, wherein: The connecting arm (501) is symmetrically provided with two, and the notch (702) is annularly and symmetrically provided with four.

7. A dual system controlled horizontal curtain positioner as claimed in claim 1, wherein: The linkage of the connecting gear (5) and the nut gear (6) is direct meshing linkage or a transition gear (56) which is meshed with the connecting gear (5) and the nut gear (6) is arranged, and the connecting gear (5) and the nut gear (6) are linked through the transition gear (56).

8. A dual system controlled horizontal curtain positioner as defined in claim 1, wherein: The two ends of the base (101) are provided with a fixing groove (21) and a pressing block (22), the fixing groove (21) is provided with a threaded surface (2101) matched with the screw rod (2), and the screw rod (2) is fixedly arranged between the fixing groove (21) and the pressing block (22).

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