WO2023015468A1

WO2023015468A1 - Curtain frequency modulation device

Info

Publication number: WO2023015468A1
Application number: PCT/CN2021/111962
Authority: WO
Inventors: 雷振邦; 雷兴邦
Original assignee: 东莞市雷富溢窗饰科技有限公司
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2023-02-16

Abstract

Embodiments of the present application provide a curtain frequency modulation device, comprising a hollow bottom shell having an opening at the top end, a worm gear mechanism provided in the bottom shell, an operation member transmittingly connected to a worm, and a cover plate assembled at the opening of the bottom shell. Two ends of a worm gear in the worm gear mechanism are pivotally provided on two opposite sidewalls of the bottom shell, respectively; two side edges of the cover plate corresponding to the two opposite sidewalls of the bottom shell where the worm is pivotally provided are respectively bent and extended toward the bottom shell to form limiting hooks; the limiting hooks that are respectively provided on the two side edges of the cover plate abut against and limit the corresponding sidewalls from the outer sides of the two opposite sidewalls of the bottom shell where the worm is pivotally provided. In the embodiments of the present application, the limiting hooks are provided on two sides of the cover plate, and the limiting hooks on the two sides abut against and limit the two opposite sidewalls of the bottom shell where the worm gear is pivotally provided, thereby overcoming thrust of the worm gear to the sidewalls, avoiding serious deformation of the sidewalls, enhancing the structural stability of the bottom shell, and ensuring normal operation of the device.

Description

Curtain FM device

technical field

The embodiment of the present application relates to the technical field of curtain accessories, in particular to a curtain frequency modulation device.

Background technique

The blind body is composed of several blades connected in series by several ropes. For the convenience of controlling the amount of light transmitted through the curtain, a frequency modulation device is often added to the curtain. A common frequency-regulating device for curtains usually includes a worm wheel, a worm meshingly connected with the worm wheel, and two side shells accommodating the worm wheel and the worm screw from both sides. During specific operation, the user applies power to the worm to make it rotate, and then the worm drives the worm wheel meshed with it to rotate, and a non-circular shaft hole is axially opened in the center of the worm wheel to output power outward to realize the retraction of the pull cord for adjustment. The angle of placement of the blades of the curtain body changes the amount of light transmitted through the curtain.

However, during the frequency modulation operation, the external force drives the worm to rotate, and the helical structure on the worm generates an axial component force on the worm wheel during the meshing transmission process, and the worm wheel is forced to generate axial displacement and squeeze the two pieces The side shell is easy to split the two side shells and the structure is unstable.

technical problem

The technical problem to be solved by the embodiments of the present application is to provide a curtain frequency modulation device with a stable structure.

technical solution

In order to solve the above-mentioned technical problems, the embodiments of the present application provide the following technical solutions: including: a curtain frequency control device, comprising a hollow bottom shell with an open top, a worm gear mechanism arranged in the bottom shell, and one end extending into the bottom The operating part in the shell and connected with the worm in the worm gear mechanism and the cover plate assembled at the opening of the bottom case to close the opening, the two ends of the worm wheel in the worm gear mechanism are respectively pivoted on On the opposite side walls of the bottom case, the two side edges of the cover plate corresponding to the opposite side walls of the bottom case on which the worm gear is pivoted are respectively bent and extend toward the bottom case to form stoppers. The hooks, the limiting hooks respectively provided on the two side edges of the cover plate respectively abut against the corresponding sidewalls for limiting from the outer sides of the opposite sidewalls on which the worm wheel is pivoted on the bottom case.

Further, the limiting hook is formed by bending and extending from the middle section of the corresponding side edge of the cover plate.

Further, a first guiding slope is formed at the joint between the free end surface of the limit hook and the inner surface.

Further, the same end of the cover plate forming the two side edges of the limit hook is coaxially provided with a pivot shaft, and a pivot hole is provided at the corresponding end of the bottom case, and the cover plate is connected by two The two pivot shafts are respectively pivotally connected to the corresponding pivot holes.

Further, the corresponding ends of the two side walls of the bottom case on which the worm wheel is pivoted respectively extend outward toward the outside of the opening to form pivot joint ears protruding relative to the two side walls of the bottom case, and the pivot joint holes are set on the pivot ear.

Further, the pivot hole is an open slot formed by extending from the outer edge of the pivot ear toward the inner edge, and the pivot shaft enters the open slot from the notch of the open slot and positioned against the bottom wall of the open slot hole opposite to the notch.

Further, a backstop step is provided inside the notch of the open slot.

Further, the two side edges of the cover plate forming the limit hooks are respectively coaxially provided with locking shafts at the ends far away from the pivot shafts, and the bottom shell is located at a position corresponding to the locking shafts. A clamping hole is provided at the position to be clamped and fixed with the clamping shaft.

Further, the corresponding ends of the two side walls of the bottom case on which the worm wheel is pivoted respectively extend outward toward the outside of the opening to form snap-in pieces protruding relative to the two side walls of the bottom case, and the snap-in holes It is set on the snap-in piece, and the inner surface of the snap-in piece is also formed with a second guide slope extending from the top edge of the snap-in piece away from the bottom shell to the direction of the snap-in hole, and the end surface of the snap-in shaft also corresponds to A third guiding slope is provided.

Further, the pivot shaft and the clamping shaft have the same shape and are arranged symmetrically to each other.

Beneficial effect

After adopting the above-mentioned technical solution, the embodiment of the present application has at least the following beneficial effects: In this embodiment, a cover plate is provided at the opening of the bottom shell to close the opening, and the cover plate is provided on the two opposite side walls pivoted corresponding to the worm wheel. The side edges are respectively bent and extended toward the bottom shell to form a limit hook, and the limit hooks respectively abut against the corresponding side walls of the limit from the outer sides of the opposite side walls of the bottom shell on which the worm wheel is pivoted, Therefore, in actual use, when the worm gear is pushed outward against the corresponding side wall of the bottom case by the force of the worm, the limit hook can abut against and limit the side wall from the outer sides of the opposite two side walls of the bottom case. , can effectively overcome the thrust of the worm wheel on the side wall, avoid serious deformation of the side wall, ensure the structural stability of the opposite side walls of the bottom shell to which the worm wheel is pivotally connected, and ensure the normal operation of the device.

Description of drawings

Fig. 1 is a schematic diagram of a disassembled state of an optional embodiment of a curtain frequency modulation device of the present application.

Fig. 2 is a three-dimensional structural schematic diagram of an optional embodiment of the curtain frequency modulation device of the present application.

Fig. 3 is a cross-sectional view of an optional embodiment of the curtain frequency regulating device of the present application along the central axis plane of the worm wheel perpendicular to the cover plate.

Fig. 4 is a cross-sectional view of an optional embodiment of the curtain frequency regulating device of the present application along the central plane along the thickness direction of the side wall of the bottom shell.

Fig. 5 is a cross-sectional view of an optional embodiment of the curtain frequency regulating device of the present application along the central axis plane of the worm shaft perpendicular to the central axis of the worm wheel.

Embodiments of the present invention

The present application will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following exemplary embodiments and descriptions are only used to explain the present application, not as a limitation to the present application, and, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other .

As shown in Figures 1 to 5, an optional embodiment of the present application provides a curtain frequency control device, which includes a hollow bottom case 1 with an opening 10 at the top, a worm gear mechanism 2 arranged in the bottom case 1, an end extension An operating part 3 inserted into the bottom case 1 and connected to the worm 21 in the worm gear mechanism 2 and a cover plate 4 assembled at the opening 10 of the bottom case 1 to close the opening 10, the worm gear The two ends of the worm wheel 23 in the worm mechanism 2 are respectively pivotally arranged on the opposite side walls 12 of the bottom case 1, and the opposite two ends of the cover plate 4 and the bottom case 1 for which the worm wheel 23 is pivotally arranged The corresponding two side edges of the side wall 12 are respectively bent and extend toward the bottom case 1 to form limit hooks 41 , and the limit hooks 41 respectively provided on the two side edges of the cover plate 4 are respectively pivoted from the bottom case 1 . The outer sides of the opposite sidewalls 12 with the worm wheel 23 abut against the corresponding sidewalls 12 to limit the position.

In this embodiment, a cover plate 4 is provided at the opening 10 of the bottom case 1 to close the opening 10 , and the two side edges of the opposite side walls 12 on the cover plate 4 corresponding to the worm wheel 23 pivoted are respectively bent toward the bottom case 1 Extending in the direction to form a limit hook 41, the limit hook 41 is respectively pivoted from the bottom shell 1 on the outer side of the opposite side wall 12 of the worm wheel 23 against the corresponding side wall 12 of the limit, so that In actual use, power is input through the operating member 3, and the operating member 3 drives the worm 21 to rotate. The worm 21 engages with the gear teeth 230 of the worm wheel 23 with its helical structure 210 to drive the worm wheel 23 to rotate. The force exerted by the worm 21 on the worm wheel 23 23 The axial force component makes the worm wheel 23 generate a thrust towards the outside of the bottom case 1 on the side wall 12 of the bottom case, and the limit hooks 41 at the two side edges of the cover plate 4 can be released from the bottom case 1 The outer sides of the opposite side walls 12 are abutted against the side walls 12, which can effectively overcome the thrust of the worm wheel 23 on the side walls 12, avoid serious deformation of the side walls 12, and ensure that the bottom shell 1 is pivotally connected to the worm wheel 23. The structural stability of the relative side walls 12 ensures the normal operation of the device. Wherein, the operation part 3 and the worm screw 2 can be connected by gears 30 and 25 (as shown in Figure 5 ) respectively arranged on the adjacent ends of the operation part 3 and the worm screw 2 to realize the transmission connection, or a pulley and a belt (not shown in the figure) can be used. common transmission structures such as the cooperation of the sprocket and the chain (not shown) or the cooperation of the sprocket and the chain (not shown) to realize power transmission.

In yet another optional embodiment of the present application, as shown in FIGS. 1-2 , the limiting hook 41 is formed by bending and extending from the middle section of the corresponding side edge of the cover plate 4 . Since the two ends of the worm wheel 23 are assembled in the middle of the corresponding side wall 12 of the bottom case 1, the middle part of the side wall 12 is most likely to be deformed by force. The limit hook 41 is extended so as to more effectively implement abutment limit on the middle part of the corresponding side walls 12 of the bottom case 1 that may be deformed.

In yet another optional embodiment of the present application, as shown in FIGS. 1-3 , a first guiding slope 410 is formed at the joint between the free end surface and the inner surface of the limit hook 41 . In this embodiment, a first guide inclined surface 410 is provided at the joint between the free end surface of the limit hook 41 and the inner surface. When the cover plate 4 is closed, the first guide inclined surface 410 and the bottom case The top edges of the corresponding side walls 12 of 1 cooperate with each other to guide the limiting hook 41 to the outer side of the corresponding side wall 12 more smoothly, and the assembly is convenient and labor-saving.

In yet another optional embodiment of the present application, as shown in Figures 1-2, the same end of the cover plate 4 forming the two side edges of the limit hook 41 is also coaxially provided with a pivot shaft 43, where Corresponding ends of the bottom shell 1 are provided with pivot holes 14 , and the cover plate 4 is pivotally connected to the corresponding pivot holes 14 by two pivot shafts 43 . In this embodiment, a pivot shaft 43 is coaxially provided at the same end of the cover plate 4 forming the two side edges of the limiting hook 41, and a pivot hole 14 is provided at the corresponding end of the bottom case 1, so that The cover plate 4 is pivotally connected to the corresponding pivot holes 14 by the two pivot shafts 43 , so as to realize the connection between the cover plate 4 and the bottom case 1 , and at the same time locate the fastening position of the cover plate 4 .

In yet another optional embodiment of the present application, as shown in Fig. 1 , Fig. 2 and Fig. 4 , the corresponding ends of the two side walls 12 of the bottom shell 1 on which the worm wheel 23 is pivoted respectively extend outward toward the outside of the opening 10. A pivot joint ear 15 protruding relative to the two side walls 12 of the bottom case 1 is formed, and the pivot joint hole 14 is opened on the pivot joint ear 15 . In this embodiment, pivot joint ears 15 are formed by protruding toward the opposite side walls 12 of the opening 10 at the corresponding ends of the two side walls 12 pivotally connected with the worm wheel 23, and the pivot joint holes 14 are provided on the pivot joint ears 15 to pivot The ear 15 protrudes relative to the bottom case 1 so that the pivot shaft 43 on the cover plate 4 is snapped into the pivot hole 14 .

Another optional embodiment of the present application, as shown in Figure 1, Figure 2 and Figure 4, the pivot hole 14 is an opening formed by extending from the outer edge of the pivot ear 15 toward the inner edge. Slot, the pivot shaft 43 enters the open slot 14 from the notch 141 of the open slot 14 and abuts against the bottom wall of the open slot 14 opposite to the notch 141 for positioning . In this embodiment, the pivot hole 14 is set as an open slot hole, and the pivot shaft 43 is inserted into the open slot hole 14 from the notch 141 of the open slot hole 14 to realize the pivot connection between the cover plate 4 and the bottom case 1. Simple, improve assembly efficiency.

In yet another optional embodiment of the present application, as shown in FIG. 1 , FIG. 2 and FIG. 4 , an anti-retreat step 143 is provided inside the notch 141 of the open slot hole 14 . In this embodiment, a stopper step 143 is provided inside the notch 141 of the open slot hole 14 . During assembly, the pivot shaft 43 can pass over the stop step 143 and enter the inside of the open slot hole 14 with a little force. At this time, the backstop step 143 can effectively prevent the pivot shaft 43 from slipping out of the notch 141 again, and enhance the stability of the connection between the pivot shaft 43 and the open slot 14 .

In yet another optional embodiment of the present application, as shown in Fig. 1, Fig. 2 and Fig. 5, the two side edges of the cover plate 4 forming the limit hook 41 are also shared at the end far away from the pivot shaft 43. A clamping shaft 45 is arranged axially, and the bottom case 1 is provided with a clamping hole 16 which is mutually clamped and fixed with the clamping shaft 45 at a position corresponding to the clamping shaft 45 . In this embodiment, snap shafts 45 are provided coaxially on the other ends of the cover plate 4 away from the pivot shafts 43 , and the bottom case 1 is provided with snap shafts 45 at positions corresponding to the snap shafts 45 . The snapping holes 16 where the snapping shafts 45 are snapped and fixed to each other, the cover plate 4 is snapped and fixed in the snapping holes 16 with the snapping shafts 45 to realize the fixed connection with the bottom case 1, the pivot shaft 43 is connected with the snapping holes 16 The connecting shafts 45 are respectively connected to the bottom case 1 from both ends of the cover plate 4, and fix the height position of the cover plate 4 relative to the bottom case 1, so as to ensure the limit effect of the limit hooks 41 on both sides on the corresponding side walls 12.

In yet another optional embodiment of the present application, as shown in Fig. 1 , Fig. 2 and Fig. 5 , the corresponding ends of the two side walls 12 on which the worm wheel 23 is pivoted of the bottom case 1 respectively extend outward toward the outside of the opening. A snap-in piece 17 protruding relative to the two side walls of the bottom case 1 is formed, the snap-in hole 16 is opened on the snap-in piece 17, and a self-locking piece is formed on the inner surface of the snap-in piece 17 17 is away from the second guiding slope 170 extending toward the locking hole 16 from the top edge of the bottom case 1 , and the end surface of the locking shaft 45 is also provided with a third guiding slope 450 correspondingly. In this embodiment, the snap-in piece 17 is extended outwardly from the corresponding end of the bottom case 1 relative to the opening 10, and the snap-in hole 16 is opened on it. The snap-in piece 17 protrudes relative to the side wall 12, and can be relatively It is easy to expand elastically so that the clamping shaft 45 is snapped into the clamping hole 16; at the same time, the second guiding slope 170 provided on the inside of the clamping piece 17 and the third guiding slope 450 provided on the end surface of the clamping shaft 45 can cooperate with each other, The clamping shaft 45 pushes against the clamping piece 17 more smoothly so that the two clamping pieces 17 are opened correspondingly so that the clamping shaft 45 is snapped into the clamping hole 16 , and the installation is more labor-saving.

In yet another optional embodiment of the present application, as shown in FIGS. 1-2 , the pivot shaft 43 and the clamping shaft 45 have the same shape and are arranged symmetrically to each other. In this embodiment, the shape of the pivot shaft 43 and the snap shaft 45 are set to be the same, and they are arranged symmetrically on the cover plate 4, so that the pivot shaft 43 and the snap shaft 45 can replace each other functionally. , so that in actual assembly, there is no need to strictly distinguish the pivot shaft 43 and the clamping shaft 45, and the convenience of assembling the cover plate 4 can be effectively improved.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Under the inspiration of the present application, without departing from the purpose of the application and the protection scope of the claims, many forms can also be made, and these all belong to the protection scope of the application.

Claims

A curtain frequency control device, comprising a hollow bottom case with an open top, a worm gear mechanism arranged in the bottom case, and an operating member with one end protruding into the bottom case and connected with the worm in the worm gear mechanism As well as a cover plate assembled at the opening of the bottom case to close the opening, the two ends of the worm wheel in the worm gear mechanism are respectively pivotally arranged on the opposite side walls of the bottom case, it is characterized in that the The two side edges of the cover plate corresponding to the opposite side walls on which the worm wheel is pivoted are respectively bent and extend toward the bottom shell to form limit hooks. The limit hooks are respectively pivoted from the bottom shell to the outer sides of the opposite side walls of the worm wheel to abut against the corresponding side walls for position limit.
The frequency-regulating device for curtains according to claim 1, wherein the limiting hook is formed by bending and extending from the middle section of the corresponding side edge of the cover plate.
The frequency-regulating device for curtains according to claim 1 or 2, characterized in that, a first guiding slope is formed at the joint between the free end surface of the limit hook and the inner surface.
The frequency-regulating device for curtains according to claim 1, characterized in that, the same end of the cover plate forming the two side edges of the limit hook is also coaxially provided with a pivot shaft, and the corresponding end of the bottom shell is A pivot hole is provided, and the cover plate is respectively pivotally connected to the corresponding pivot hole by the two pivot shafts.
The frequency-regulating device for curtains according to claim 4, wherein the corresponding ends of the two side walls of the bottom shell on which the worm wheel is pivoted respectively extend outward toward the outside of the opening to form a convex shape relative to the two side walls of the bottom shell. The pivoting ear is provided, and the pivoting hole is opened on the pivoting ear.
The frequency-regulating device for curtains according to claim 5, wherein the pivot hole is an open slot formed by extending from the outer edge of the pivot ear to the inner edge, and the pivot shaft The notch of the open slot enters into the open slot and is positioned against the bottom wall of the open slot opposite to the notch.
The frequency-regulating device for curtains according to claim 6, characterized in that, a back-stop step is provided on the inner side of the slot of the open slot.
The frequency-regulating device for curtains as claimed in claim 4 or 5, characterized in that, the two side edges of the cover plate forming the limit hooks are respectively coaxially provided with snap-in shafts at the ends far away from the pivot shafts , the bottom shell is provided with a snap-fit hole that is snap-fixed with the snap-fit shaft at a position corresponding to the snap-fit shaft.
The frequency-regulating device for curtains according to claim 8, wherein the corresponding ends of the two side walls of the bottom shell on which the worm gear is pivoted respectively extend outward toward the outside of the opening to form the two side walls of the bottom shell A protruding snap-in piece, the snap-in hole is opened on the snap-in piece, and the inner surface of the snap-in piece is also formed with a second hole extending from the top edge of the snap-in piece away from the bottom shell to the snap-in hole. As for the guide slope, the end surface of the clamping shaft is also provided with a third guide slope correspondingly.
The frequency-regulating device for curtains according to claim 8, characterized in that, the pivot shaft and the clip shaft have the same shape and are arranged symmetrically to each other.