TWI725858B - Bead chain pulley driving assembly for safety roller blind - Google Patents

Abstract

The present invention relates to a bead chain pulley driving assembly for a safety roller blind, comprising a bead chain pulley, a bead chain having a plurality of beads, a transmission component, a resilient propping element and a binding guard. The pulley has a groove formed on an outer periphery thereof for receiving the beads of the bead chain. The pulley can be driven to rotate when the bead chain is pulled. The pulley further has a recess formed on a center thereof for assembling of the resilient propping element and the transmission component, wherein the resilient propping component is fitted between the transmission and the pulley. A ring is protruded around an edge of the recess in an axial direction. A binding hole is formed on a center of the binding guard. After the binding guard is engaged with one lateral of the pulley, the binding hole of the binding guard can be adapted to closely sleeve on the protruded ring of the pulley, so as to exert a binding force to bind up the transmission component, for significant connection of the transmission component to the pulley. In this way, it can not only prevent the bead chain in the groove of the pulley from coming off the groove of the pulley in the course of operation, but also allow the transmission component, the resilient binding element, the pulley to remain in an assembled state in case of the pulley coming off a base of a roller blind clutch and falling on the ground to avoid undesired events of children eating tiny parts by mistake.

Description

Bead chain disc drive assembly structure of safety curtain

This invention relates to a bead chain disc drive assembly structure for safety curtains, in particular to a bead that can prevent the bead chain from detaching from the bead chain groove when it is in operation, and can remain integrated and not separated when falling to the ground, so as to prevent children from eating by mistake Innovative structure design of chain drive assembly.

Traditional Roman blinds, roller blinds or venetian blinds are mainly driven by pulling the bead chain to drive the bead chain disc to rotate, and then the bead chain disc is driven by the transmission member to actuate the curtain rod to control the curtain body to roll up or hang down. However, the bead chain of the curtain controller is exposed and hangs outside, so it can be easily constructed for children to play. If it is not careful, it will wrap around the neck, leading to a dangerous situation of being strangled. Therefore, in order to prevent children from being strangled to death by curtain ropes, governments of various countries now regulate the design of curtain ropes by curtain manufacturers to have a safety structure that can be unfastened and released by force to ensure the safety of children.

For example, No. TW I661798 "Curtain structure with safe detachment", the bead chain disc accommodating space formed by the fixed seat and the assembly base contains the bead chain disc, the elastic member and the first transmission member in the cavity , When the child pulls the bead chain rope around the neck, the first transmission member is guided by the tapered end of the first transmission member and the cone-shaped groove of the second transmission member installed on the assembly base. Generates a thrust force in the direction of the bead chain disc, so that the first transmission member is retracted into the cavity of the bead chain disc, so that the bead chain disc and the bead chain rope are separated from the bead chain disc accommodating space, and the bead chain is released Rope wrapped around the neck.

Another example is the "Curtain Controller Structure" of No. TW M588496, which includes a first transmission group, a base, and a second transmission group; the base includes a first base and a second base that are correspondingly combined with each other, the first base and the A second transmission group is assembled between the second bases. The second transmission group includes a linkage, a first bead chain plate, a transmission member, an elastic pusher, a second bead chain plate, a bead chain, and a first and a second bead chain The discs are correspondingly combined. The transmission part and the elastic pushing part are assembled between the first and second bead chain discs. The two ends of the transmission part are respectively clamped to the connecting part and the first bead chain disc. The transmission part is pushed by the elastic pushing part. Push so that the combined first and second bead chain discs can be displaced between the first base and the second base; the normal transmission member can engage with the linkage and the first bead chain disc for transmission, when When there is a bead chain around the neck and the first and second bead chain discs produce a pull force which is greater than the force of the transmission member to engage the linkage member, the first and second bead chain discs, the transmission member, the elastic pusher and the bead chain will Falling away from the position between the first base and the second base, to achieve safety protection measures to prevent young children from winding their necks.

However, due to the aforementioned Patent No. TW I661798, the dropped parts in the safety mechanism include the first transmission part and the elastic part, and the No. M588496 patent case, the dropped parts in the safety mechanism include the transmission part. , The elastic pusher, and it will be separated from the bead chain discs (first and second bead chain discs) after falling, especially the transmission parts and elastic pushers are small parts, which are easy to pick up for young children. Swallowing affects the safety of young children.

In view of the shortcomings in the implementation and use of the above patents, the present invention has been modified and improved to develop a method that can prevent the transmission member and the elastic pushing member from detaching from the bead chain disc or the first and second bead chain discs. structure.

The main purpose of the present invention is to provide a bead chain disc drive assembly structure for safety curtains. The main purpose is to provide a mechanism that enables the transmission member and the elastic pusher to be assembled with the bead chain disc when the bead chain disc is pulled off under force. It is an integrated state to avoid the dangerous situation that the transmission parts and elastic push parts are scattered and picked up by children and swallowed by mistake.

The purpose and effect of the present invention are achieved by the following technologies:

A bead chain disc drive assembly structure for safety curtains, comprising a first transmission group, a base, and a second transmission group; the second transmission group is located between the first transmission group and the base, the first transmission group and the The second transmission group is connected to each other, so that the second transmission group can drive the first transmission group; a buckle mechanism that can be opened and closed is arranged between the base and the first transmission group; the second transmission group includes a transmission member , Elastic pushing piece, bead chain plate, binding fixing piece, bead chain; among them:

The transmission member is connected to the first transmission group, and one end of the transmission member facing the first transmission group is a tapered portion. The tapered portion is provided with a positioning block corresponding to the first transmission group. The member is provided with a chamber with an opening facing the bead chain disc, the chamber accommodating the elastic pushing member, a plurality of guide grooves are provided along the axial direction on the outer peripheral wall of the transmission member, and the guide grooves are facing the One end of the bead chain disc forms a stop end, but does not extend to the end of the opening of the chamber of the transmission member;

The outer circumferential ring of the bead chain disc is provided with a bead chain groove, and a concave groove with an opening toward the first transmission group is formed in the center. The circumferential edge of the concave groove forms a convex ring along the axial direction toward the binding fixing member, and the inner portion of the convex ring A plurality of guide pillars are formed on the peripheral wall, and the guide pillars correspondingly accommodate the guide grooves on the transmission member;

A binding hole is formed in the center of the binding fixing member, and the binding hole corresponds to the convex ring of the bead chain disc that is tightly sleeved to generate a binding force on the bead chain disc, and the outer diameter of the binding fixing member is greater than or equal to the bead chain The outer diameter of the disc makes the binding fixing member close the lateral gap of the bead chain groove facing the binding fixing member.

The bead chain disc drive assembly structure of the safety curtain as described above, wherein the bead chain disc is provided with a fitting hole on the disc surface facing the restraint fixing member, and the restraint fixing element is provided with a plurality of the bead chain discs on the surface facing the bead chain disc The embedding posts, the embedding posts and the embedding holes are embedded corresponding to each other.

The bead chain disc drive assembly structure of the safety curtain as described above, wherein the binding fixing member faces the surface of the bead chain disc, and is provided with a convex block corresponding to the lateral gap of the bead chain disc, and the convex block is fitted The lateral gap.

The advantages of the present invention are:

1. The binding hole is formed in the center of the binding fixture, which can correspond to the convex ring of the tightly tightening the bead chain disc, and can indirectly generate a binding and tightening force on the transmission part, improve the combination of the transmission part and the bead chain disc, and avoid the bead chain When the tray is separated from the base of the curtain controller and falls to the ground, the transmission parts and the elastic pushing parts are scattered, which may cause the children to pick up and eat by mistake.

2. Utilize the design that the restraint fixing piece is fixed on one side of the bead chain disc, and the outer diameter of the restraint fixing piece is greater than or equal to the outer diameter of the bead chain disc, so that the restraint fixing piece closes the bead chain groove toward the restraint fixation The lateral gap of the piece can prevent the bead chain from leaving the bead chain groove during operation and ensure the transmission relationship between the bead chain and the bead chain disc.

In order to make the technical content, the purpose of the invention and the effects achieved by the present invention more complete and clear, the following detailed descriptions are given, and please refer to the disclosed drawings and figure numbers together:

Please refer to the first and second pictures.

The bead chain disc drive assembly structure of the safety curtain of the present invention includes a first transmission group 1, a base 2, a second transmission group 3; the second transmission group 3 is arranged between the first transmission group 1 and the base 2 , And the first transmission group 1 and the second transmission group 3 are butted with each other, so that the second transmission group 3 can rotate the first transmission group 1; between the base 2 and the bottom end of the first transmission group 1, there is an openable and closable The buckle mechanism 11 is usually buckled in a closed state. When a child is accidentally wrapped around the neck by the bead chain 35 of the first transmission group 1, the second transmission group 3 bears more pull-down force than it and the base 2 and the first transmission group 1 is combined with the force, the buckling mechanism 11 will be forced to open, and the second transmission group 3 will be separated from the base 2, the second transmission group 3, release the bead chain 35 around the neck situation .

The second transmission group 3 includes a transmission member 31, an elastic pushing member 32, a bead chain plate 33, a binding fixing member 34, and a bead chain 35; among them:

The end of the transmission member 31 facing the first transmission assembly 1 is a tapered portion 311. The tapered portion 311 is provided with a positioning block 312. The transmission member 31 is mated and butted with the first transmission assembly 1 through the tapered portion 311 and the positioning block 312. The second transmission group 3 can drive the first transmission group 1. The transmission member 31 is provided with a chamber 313 with an opening facing the bead chain plate 33. The chamber 313 accommodates the elastic pushing member 32 and is on the outer peripheral wall of the transmission member 31 A plurality of guide grooves 314 are provided along the axial direction, and the guide grooves 314 form a stop end 315 at the end facing the bead chain plate 33, but do not extend to the end of the opening of the chamber 313 of the transmission member 31;

The outer circumference of the bead chain plate 33 is provided with a bead chain groove 331, and a concave groove 332 with an opening toward the first transmission set 1 is formed in the center. The circumferential edge of the concave groove 332 forms a convex ring 333 along the axial direction toward the fixing member 34. The convex ring A plurality of guide posts 334 are formed on the inner peripheral wall of 333, and the guide posts 334 are correspondingly received in the guide grooves 314, and stop ends 315 restrict the transmission member 31 to the ultimate position of the elastic top of the first transmission group 1;

A binding hole 341 is formed in the center of the binding fixing member 34. The binding hole 341 corresponds to the convex ring 333 of the tightly sleeved bead chain plate 33, which can generate a binding force on the bead chain plate 33, and the outer diameter of the binding fixing member 34 is greater than or It is equal to the outer diameter of the bead chain plate 33, so that the binding fixing member 34 can close the lateral gap 336 of the bead chain groove 331 facing the side of the binding fixing member 34 after being combined with the bead chain plate 33.

In a preferred embodiment of the present invention, the bead chain plate 33 is further provided with at least one insertion hole 335 on the plate surface facing the binding fixing member 34, and the binding fixing member 34 is provided with a corresponding insertion hole 335 on the surface facing the bead chain plate 33. The fitting posts 342 of the engaging holes 335 are embedded correspondingly with the fitting holes 335, and the fitting posts 342 have oblique introduction ends.

In the preferred embodiment of the present invention, the binding fixing member 34 is further made to face the surface of the bead chain plate 33, and a protrusion 343 is provided corresponding to the lateral gap of the bead chain plate 33, and the protrusion 343 The lateral gap 336 is fitted.

When assembling, the elastic pushing member 32 is accommodated in the chamber 313 of the transmission member 31, and the transmission member 31 is inserted into the recessed groove 332 of the bead chain plate 33, so that the guide post 334 is correspondingly accommodated in the guide groove 314, Then the bead chain 35 is wound around the bead chain groove 331 of the bead chain plate 33, and then the binding hole 341 of the binding fixing member 34 is corresponding to the convex ring 333 of the tightly sleeved bead chain plate 33 to generate a binding force on the bead chain plate 33 At the same time, because the outer diameter of the restraint fixing member 34 is greater than or equal to the outer diameter of the bead chain disc 33, the restraint fixing member 34 can close the bead chain groove 331 toward the side of the restraint fixing member 34 after being combined with the bead chain disc 33 The notch 336 can prevent the bead chain 35 surrounding the bead chain groove 331 from being laterally separated from the bead chain groove 331 in the direction of the first transmission group 1, ensuring that when the bead chain 35 is operated, the first transmission can be smoothly transmitted through the second transmission group 3 Group 1, and finally the second transmission group 3 is installed between the first transmission group 1 and the base 2 to complete the assembly.

When the bead chain 35 is pulled around the neck and the force is greater than the fastening force of the fastening mechanism 11, the fastening mechanism 11 will open, so that the second transmission group 3 will fall off from the first transmission group 1 and the base 2. When falling, the guide post 334 of the bead chain plate 33 is correspondingly locked in the guide groove 314 of the transmission member 31, and the binding hole 341 of the binding fixing member 34 corresponds to the convex ring 333 of the bead chain plate 33 that is tightly sleeved. The bead chain plate 33 generates a binding force to keep the transmission member 31, the elastic pushing member 32, the bead chain plate 33 and the binding fixing member 34 of the second transmission group 3 in an integrated state, so as to prevent the parts from being scattered and eaten by children.

The above-mentioned examples are only part of the embodiments of the present invention, and are not intended to limit the present invention. Any modification based on the creative spirit and characteristics of the present invention should also be included in the scope of this patent.

In summary, the embodiments of the present invention can indeed achieve the expected use effects, and the specific technical means disclosed by it have not been seen in similar products, nor have they been disclosed before the application. It is in full compliance with the patent law. Regulations and requirements, Yan submits an application for a patent for invention in accordance with the law, and asks for favors for examination, and grants a patent for approval, which is really convenient.

1: The first transmission group

11: Fastening mechanism

2: pedestal

3: The second transmission group

31: Transmission parts

311: Taper

312: positioning block

313: room

314: Guide Groove

315: end

32: Elastic pusher

33: Bead chain plate

331: Bead Chain Groove

332: Depressed Groove

333: Convex Ring

334: Guide Post

335: Fitting Hole

336: Lateral Gap

34: binding fixture

341: Binding Hole

342: Fitting Column

343: bump

35: Bead chain

Figure 1: A three-dimensional exploded view of the drive assembly structure of the bead chain disc of the safety curtain of the present invention

Figure 2: A combined perspective view of the drive assembly structure of the bead chain disc of the safety curtain of the present invention

Figure 3: Combined sectional view of the drive assembly structure of the bead chain disc of the safety curtain of the present invention

Figure 4: A schematic diagram of the second transmission group being separated from the base and the first transmission group when the bead chain is pulled down by force

Figure 5: A schematic diagram of the second transmission group falling due to the pull of the bead chain

1: The first transmission group

11: Fastening mechanism

2: pedestal

3: The second transmission group

31: Transmission parts

311: Taper

312: positioning block

314: Guide Groove

315: end

32: Elastic pusher

33: Bead chain plate

331: Bead Chain Groove

332: Depressed Groove

333: Convex Ring

334: Guide Post

335: Fitting Hole

336: Lateral Gap

34: binding fixture

341: Binding Hole

342: Mosaic Column

343: bump

35: Bead chain

Claims (3)

A bead chain disc drive assembly structure for safety curtains, comprising a first transmission group, a base, and a second transmission group; the second transmission group is located between the first transmission group and the base, the first transmission group and the The second transmission group is connected to each other, so that the second transmission group can drive the first transmission group; a buckle mechanism that can be opened and closed is arranged between the base and the first transmission group; the second transmission group includes a transmission member , Elastic pushing piece, bead chain plate, binding fixing piece, bead chain; among them: The transmission member is connected to the first transmission group, and one end of the transmission member facing the first transmission group is a tapered portion. The tapered portion is provided with a positioning block corresponding to the first transmission group. The member is provided with a chamber with an opening facing the bead chain disc, the chamber accommodating the elastic pushing member, a plurality of guide grooves are provided along the axial direction on the outer peripheral wall of the transmission member, and the guide grooves are facing the One end of the bead chain disc forms a stop end, but does not extend to the end of the opening of the chamber of the transmission member; The outer peripheral ring of the bead chain disc is provided with a bead chain groove, the center of which forms a recessed groove with an opening toward the first transmission group, the peripheral edge of the recessed groove forms a convex ring along the axial direction toward the binding fixing member, and the inner portion of the convex ring A plurality of guide pillars are formed on the peripheral wall, and the guide pillars correspondingly accommodate the guide grooves on the transmission member; A binding hole is formed in the center of the binding fixing member, and the binding hole corresponds to the convex ring of the bead chain plate that is tightly sleeved to generate a binding force on the bead chain plate, and the outer diameter of the binding fixing member is greater than or equal to the bead chain The outer diameter of the disc makes the restraint fixing member close the lateral gap of the bead chain groove facing the restraining fixing member. The bead chain disc drive assembly structure of the safety curtain according to claim 1, wherein the bead chain disc is provided with a fitting hole on the disc surface facing the restraint fixing member, and the restraint fixing element is provided on the surface facing the bead chain disc There are a plurality of embedding posts, and the embedding posts and the embedding hole are embedded corresponding to each other. According to claim 1 or 2, the bead chain disc drive assembly structure of the safety curtain, wherein the binding fixing member faces the surface of the bead chain disc and is provided with a bump corresponding to the lateral gap of the bead chain disc, The protrusion is fitted into the lateral gap.

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