TWI413502B - Safe cord-locked apparatus of roman blind - Google Patents

Abstract

A safe cord-locked apparatus of roman blind is described. The safe cord-locked apparatus includes a housing base having a groove, an axis wheel, an elastic unit, and a cord wheel. The axis wheel is positioned in the groove for supporting the drawing rope. The elastic unit is used to position the axis wheel in the groove. When the drawing rope is drawn by an external force which is greater than the elastic force of the elastic unit, the axis wheel slides along the groove so that the drawing rope is freely drawn on the axis wheel again by changing the status between the axis wheel and the cord wheel from clipping state to a separating state. The safe cord-locked apparatus can totally lock the drawing rope for avoiding the user's wound accident by the elevating rope so as to increase the safety of roman blind. Moreover, after the elevating rope is drawn, the roman blind can still be continuously operated even if additional coupling components or elements are not connected to the roman blind.

Description

Roman blind safety lock device

The present invention relates to a cord lock device for a curtain, and more particularly to a safety lock rope device for preventing an accidental roaming of a pull cord from a user to improve the safety of use of the roman shade.

The roman blind of the prior art has an upper beam and a blackout curtain, and the upper and lower actuations of the curtain are achieved by pulling the lifting rope and the lifting rope, and the lifting device is used to control the height and position of the curtain to be stowed and lowered. The shaft wheel in the lifting device is fixed, so when the pulley moves upward, the pulling rope can be clamped and locked between the shaft wheel and the pulley, so that the lock is in a state of locking, and the hem of the curtain is not It will fall downward due to gravity, so that the curtain can be kept at a fixed high and low position, but it often causes the lifting cord to be loosened and causes a problem that easily hurts the neck of the user.

Although the prior art pulls the curtain lifting rope away from the preset external force, the curtain lifting rope can be separated from the shading unit of the curtain itself, thereby preventing the curtain lifting rope from hurting the user's neck, but after the separation The device components will make the curtain itself unable to continue to be used normally, and the connection device or component between the curtain curtain and the lifting rope must be additionally re-assembled to restore the operation function of the curtain. In view of this, there is a need to develop a new type of curtain cord device to solve the above problems.

It is an object of the present invention to provide a safety lock rope device for a roman shade to prevent accidents in which the drawstring is wound around the user, thereby improving the safety of use of the roman shade.

In order to achieve the above object, the present invention provides a robber curtain for a roman shade comprising an upper beam, a curtain, a hem, a roller set, a safety lock rope device, a pull rope, a lifting rope, and a buckle. When the pulling rope at the lower end of the safety lock rope device is pulled up, the lifting rope is pulled to lift the curtain to raise the curtain, and the safety rope device is used to lock the pulling rope so that the cloth curtain is fixed at a higher height. Position; when the curtain is to be lowered, pull the pull rope laterally to loosen the safety rope device to pull the rope, and then use the hem and the gravity of the curtain to move it downward, and fix the curtain to the lower position. The safety lock rope device of the invention can completely lock the pull rope and avoid the accident that the lift rope is wound around the user, so as to improve the safety of use of the roman shade.

The safety lock device includes a housing, a shaft wheel, at least one elastic member, and a pulley. The housing has at least one groove, at least one positioning portion and a restricting portion, the groove is extending through the side wall of the housing, the positioning portion is disposed outside the side wall, and the limiting portion is disposed inside the side wall . The axle wheel is disposed in the groove of the housing to support a pulling rope and guiding the pulling of the pulling rope. One end of the at least one elastic member is connected to the positioning portion of the housing, and the other end portion is coupled to the shaft wheel, and the elastic member is pulled from the end portion toward the other end portion by an elastic force. Positioning the axle wheel within the groove. The pulley is disposed in the housing, and the limiting portion limits the range of movement of the pulley, and the pulley is used to hold the pulling rope on the axle pulley. Therefore, when the pulley is separated from the axle wheel, the pulling rope can be freely pulled on the axle wheel. Wherein, when the shaft wheel and the pulley are in a separated state, the pulling rope can be freely pulled on the shaft wheel to raise or lower the height of the roman shade, and when the shaft wheel is pulled When the lead rope contacts the pulley, the pulling rope is used to drive the pulley to move toward the shaft wheel, and the shaft wheel and the pulley clamp the pulling rope, thereby fixing the height of the roman shade. When the other end of the pulling rope is pulled by an external force greater than the elastic force, the shaft wheel moves along the groove, so that the shaft wheel and the pulley are changed from the clamped state to the separated state, and the The pullstring is again free to be pulled on the axle.

The roman shade with the safety rope locking device of the present invention is provided with a sliding groove at a position where the shaft wheel is mounted in the safety rope locking device, and the elastic shaft is used to fix the shaft wheel, and the external force of the lifting rope is pulled up. When the preset safety range (ie, the elastic force of the elastic member) is exceeded, the shaft wheel is allowed to slide in the groove so that the lifting rope does not assume a locked state and is prevented from being wound around the user, so that The roman shade has a better safety function, and the elevating cord of the present invention can continue to be used normally after being pulled by an external force without additionally assembling a connecting device or component.

In order to make the above-mentioned contents of the present invention more comprehensible, the preferred embodiments are described below, and the detailed description is as follows:

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is described in detail with reference to the accompanying drawings

Referring to Figure 1, there is shown a schematic view of a roman shade with a safety lock device in an embodiment of the present invention. The roman shade 100 includes an upper beam 102, a curtain 104, a hem 106, a roller set 108, a safety lock device 110, a pull cord 112, a lift cord 114, and a buckle 116. The upper edge of the curtain 104 is connected to the upper beam 102, which can be stored inside the upper beam 102; the lower edge of the curtain 104 is connected to the hem 106; the plurality of roller sets 108 are fixed below the upper beam 102; The rope device 110 is disposed below the upper beam 102 and adjacent to the roller set 108; the pull rope 112 passes through the pulley of the roller set 108 and passes through the safety lock device 110; the buckle 116 is disposed on the curtain On the back side of the 104, for example, two rows of buckles 116 are disposed on the back of the curtain 104 from top to bottom. The two lift cords 114 pass through the two rows of buckles 116, respectively, and one end of each lift cord 114 is connected to the bottom left. The right two buckles 116, the other end of each lifting rope 114 passes through to the front surface of the curtain 104 and is respectively connected to the pulling rope 112.

When the pull cord 112 at the lower end of the safety lock device 110 is pulled up, the lift cord 114 is driven and the curtain 104 is pulled, thereby lifting the curtain 104, and the pull cord 112 is locked by the safety lock device 110. So that the curtain 104 is fixed at a higher position; when the curtain 104 is to be lowered, the pull cord 112 is pulled laterally, and the safety lock device 110 is released from the pull cord 112, and the hem 106 is utilized. The weight of the curtain 104 causes it to move downward, thereby securing the curtain 104 to a lower position. The safety lock device 110 of the present invention can completely lock the pull cord 112 and avoid the accident that the lift cord 114 wraps around the user to improve the safety of use of the roman shade.

2A-2C, FIG. 2A is a perspective view of the safety lock device 110 in the embodiment of the present invention; FIG. 2B is a bottom view of the safety lock device 110 in the second embodiment of the present invention; 2C is a cross-sectional view of the safety cord device 110 taken along line A-A' in the second panel of the present invention. The safety lock device 110 is suitable for use with a roman shade 100 that includes a housing 200, a shaft wheel 202, a resilient member 204, and a pulley 206.

The housing 200 has at least one groove 208 , at least one positioning portion 210 , and a limiting portion 212 . The groove 208 extends through the sidewall 214 of the housing 200 , and the positioning portion 210 is disposed outside the sidewall 214 . The restricting portion 212 is disposed inside the side wall 214. The housing 200 further includes a fixing hole 218 for fixing the safety cord device 110 to the roman shade 100; the positioning portion 210 further includes a second concave portion 222 for engaging the end 204a of the elastic member 204. . In one embodiment, it is provided with two grooves 208 and two positioning portions 210 for stably supporting the shaft wheel 202, and the two positioning portions 210 are used for fixing two elastic portions. Element 204.

The axle wheel 202 is disposed in the groove 208 of the housing 200 to support a pull cord 112 (as shown in FIG. 3A) and to guide the pulling action of the pull cord 112. The shaft wheel 202 further includes a first shaft 202a and a second shaft 202b. The first shaft 202a is inserted into the groove 208 to be engaged with the elastic member 204. The second shaft 202b is connected. The first shaft 202a supports the pulling rope 112. The outer diameter of the second shaft 202b is larger than the outer diameter of the first shaft 202a. The axle wheel 202 further includes a first concave region 220 for snapping the other end 204b of the elastic member 204.

At least one elastic member 204 has one end portion 204a connected to the positioning portion 210 of the housing 200, and the other end portion 204b is coupled to the shaft wheel 202. The elastic member 204 is biased from the end portion by an elastic force. Pulling toward the other end 204b to position the axle wheel 202 to the groove 208. In an embodiment, two elastic members 204 are respectively fixed to the two positioning portions 210. The pulley 206 is disposed in the housing 200. The restriction portion 212 limits the range of movement of the pulley 206. The pulley 206 is used to hold the pull cord 112 on the axle wheel 202 or the pulley 206. When the shaft wheel 202 is separated from the shaft wheel 202, the pull cord 112 can be freely pulled on the shaft wheel 202. The resilient member 204 can be, for example, a tension spring, a linear spring, and/or other types of springs.

Referring to FIGS. 3A-3C, FIG. 3A is a cross-sectional view showing the safety lock device 110 in the loose state in the embodiment of the present invention; FIG. 3B is a view showing the safety lock device 110 in the embodiment of the present invention. A cross-sectional view in a clamped state; and a third cross-sectional view in which the safety lock device 110 according to the embodiment of the present invention is pulled by an external force and is again in a released state.

In FIG. 3A, when the shaft wheel 202 and the pulley 206 are in a separated state, the pulling rope 112 can be freely pulled on the shaft wheel 202 to raise or lower the height of the roman shade 100. . In other words, the pull cord 112 of the drape 104 is unrestricted and locked and can be freely pulled on the axle wheel 202.

In FIG. 3B, when the pulling cord 112 on the axle wheel 202 is in contact with the pulley 206, the pulling cord 112 can be used to move the pulley 206 toward the axle wheel 202, so that the axle wheel 202 and the pulley The pull cord 112 is clamped to secure the height of the roman shade 100. That is, when the pulling rope 112 pulls the pulley 206 upward, the pulling rope 112 is clamped by the shaft wheel 202 and the pulley 206, so that it is in a closed state, because the elastic member 204 will limit the shaft wheel 202. The position causes the pullstring 112 to be clamped by the axle wheel 202 and the pulley 206 and restricts the actuation of the lift cord 114, thereby preventing the curtain 104 from falling downward due to gravity.

In FIG. 3C, when the other end of the pulling cord 112 is pulled by a force 216 that is greater than the elastic force, the shaft wheel 202 moves along the groove 208, and the shaft wheel 202 is coupled thereto. The pulley 206 transitions from the clamped state to the disengaged state 224 such that the pullstring 112 can be freely pulled on the axle wheel 202 again. The direction in which the external force 216 is applied is the same as the direction in which the shaft wheel 202 moves. Specifically, when the lifting cord 114 is pulled by the external force 216 and the pulling external force is greater than the limiting force of the spring element 204 fixing the axle wheel 202, the axle wheel 202 will slide in the groove 208 along the direction of the applied force. And causing the pull cord 112 to return to a loose state. When the force of pulling the lifting rope 114 exceeds the preset safety range, that is, the external force 216 is greater than the gravity of the curtain 104 and the hem 106 that the elastic member 204 can withstand, the shaft wheel 202 can be slid in the groove 208 to The lifting rope 114 can be pulled according to the direction of the force of the external force 216 pulling, so that the shaft wheel 202 and the pulley 206 do not exhibit a locked state that cannot be pulled, thereby enabling the roman shade 100 to have better safety functions. .

The roman shade with the safety lock device 110 of the present invention is provided with a sliding groove 208 in the position of the safety lock rope device 110 at the position of the mounting shaft wheel 202, and the elastic shaft member 204 is used to fix the shaft wheel 202. When the external force of the lifting rope 114 exceeds the preset safety range, the lifting shaft 114 can be prevented from being locked by the sliding of the groove 208, so as to avoid entanglement of the user. The roman shade 100 has a better safety function, and the lift cord 114 can continue to be used normally after being pulled by the external force 216 without additionally assembling the attachment means or components.

While the invention has been described above in terms of the preferred embodiments, the invention is not intended to limit the invention, and the invention may be practiced without departing from the spirit and scope of the invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims.

100. . . Roman blind

102. . . Upper beam

104. . . Cloth curtain

106. . . Hem

108. . . Roller set

110. . . Safety lock device

112. . . Pull the rope

114. . . Lifting rope

116. . . Buckle

200. . . case

202. . . Shaft wheel

202a. . . First shaft

202b. . . Second shaft

204. . . Elastic component

204a, 204b. . . Ends

206. . . pulley

208. . . Trench

210. . . Positioning department

212. . . Restriction department

214. . . Side wall

216. . . external force

218. . . Fixed hole

220. . . First concave area

222. . . Second concave area

224. . . Separation state

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a roman shade with a safety lock device in an embodiment of the present invention.

2A is a perspective view showing the safety lock device in the embodiment of the present invention.

Fig. 2B is a bottom view showing the safety lock device of Fig. 2A of the present invention.

Fig. 2C is a cross-sectional view showing the safety cord device along the line A-A' in Fig. 2B of the present invention.

Figure 3A is a cross-sectional view showing the safety lock device in a loose state in the embodiment of the present invention.

Figure 3B is a cross-sectional view showing the safety lock device in a clamped state in accordance with an embodiment of the present invention.

Figure 3C is a cross-sectional view showing the safety lock rope device being pulled back by the external force in accordance with an embodiment of the present invention.

200. . . case

202. . . Shaft wheel

202a. . . First shaft

202b. . . Second shaft

204. . . Elastic component

204a, 204b. . . Ends

206. . . pulley

208. . . Trench

210. . . Positioning department

214. . . Side wall

218. . . Fixed hole

220. . . First concave area

222. . . Second concave area

Claims (8)

A safety lock rope device is suitable for a roman shade, the safety lock rope device comprising: a casing having at least one groove, at least one positioning portion and a restriction portion extending through the casing a side wall, the positioning portion is disposed outside the side wall, the limiting portion is disposed inside the side wall; a shaft wheel is disposed in the groove of the housing to support a pull string and guide the Pulling the pulling rope; at least one elastic member having one end connected to the positioning portion of the housing, and the other end connected to the shaft wheel, the elastic member utilizing an elastic force The end portion is pulled toward the other end portion to position the shaft wheel to the groove; and a pulley is disposed in the housing, the restriction portion limits the range of movement of the pulley, and the pulley is used for Holding the pull rope on the shaft wheel or when the pulley is separated from the shaft wheel, the pull rope can be freely pulled on the shaft wheel; wherein when the shaft wheel is at the pulley When the state is separated, the pull rope can be freely pulled on the shaft wheel Lifting or lowering the height of the roman shade, when the pull cord on the axle wheel is in contact with the pulley, the pull cord is used to drive the pulley to move toward the axle wheel, so that the axle wheel And the pulley can clamp the pulling rope to fix the height of the roman shade, and when the other end of the pulling rope is pulled by an external force greater than the elastic force, the shaft wheel will follow the groove Moving, and by causing the axle wheel and the pulley to change from a clamped state to a disengaged state, the pullstring is freely pulled on the axle wheel. The safety cord device of claim 1, wherein the external force is applied in the same direction as the shaft wheel. The safety lock device of claim 1, wherein the elastic member is a tension spring. The security lock device of claim 1, wherein the elastic member is a linear spring. The safety lock rope device of claim 1, wherein the axle wheel further comprises: a first shaft that is inserted into the groove to be engaged with the elastic member; and a second shaft a rod coupled to the first shaft to support the pull rope, the outer diameter of the second shaft being greater than the outer diameter of the first shaft. The safety cord device of claim 1, wherein the axle wheel further includes a first concave region for snapping to the other end of the elastic member. The security lock device of claim 1, wherein the positioning portion further comprises a second concave portion for snapping to the end of the elastic member. The security lock device of claim 1, wherein the housing further includes a fastening hole for fixing the safety lock device to the roman shade.