KR20180137822A - Blind apparatus - Google Patents

Abstract

Provided is a blind apparatus which can effectively limit the range of screen movement. The blind apparatus includes a frame, a winding roll which is shaft-coupled to the frame and rotates, a screen member wound or unwound on the winding roll, a housing fixed to the winding roll and having a containing space formed therein, a fixing member fixed to the frame and having a fixing shaft inserted into the containing space of the housing, a rotation restricting portion including a spiral spring whose one end is fixed to the fixed shaft and the fixed shaft is wound several times and the other end is fixed to the housing, wherein the spiral spring maintains a completely closed state by being closely contacted with the fixed shaft at a first position, which is the rising limit position of the screen member, and is brought into close contact with an inner peripheral surface of the housing at a second position, which is a lowering limit position of the screen member.

Description

[0001] Blind apparatus [

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blind apparatus, and more particularly, to a blind apparatus capable of effectively limiting a screen moving range of a blind apparatus.

The blind apparatus is an opening / closing mechanism installed at a window, and may be formed separately from a window. The blind device may be formed to adjust the amount of incident light incident through the window using a screen capable of adjusting the length or a slant capable of tilting. The blind device adjusts the incident light to produce a subdued mining effect or to block unnecessary external gaze.

Particularly, the blind device including the screen can obtain the effect of adjusting the length of the screen and mining as much as desired or blocking the external view. Even if a single screen or one or more screens are formed by overlapping, the length of the screen can be adjusted by winding or unwinding the screen on the rollers.

However, when the rollers were rotated to adjust the length of the screen, the screen was excessively wound on the rollers and excessively loosened in the opposite direction. In other words, when the rotational force transmitted from the driving device is not appropriately limited or a limit is not set in the moving range of the screen itself, there is a problem that the screen is moved beyond the design range or the screen is moved to an undesired limit, causing the device to break or malfunction .

Also, in spite of this problem, the roller has a structure that must be rotated in order to wind or unwind the screen, so that it is also difficult to form a structure for restricting rotation at a specific position while allowing rotation. It is difficult to realize a rotation restricting structure corresponding to the function of the blind device and it is not effective because the device is unnecessarily complicated when the mechanical structure is added.

Korean Utility Model Registration No. 20-0480955, (2016.07.29)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a blind apparatus capable of effectively restricting the screen moving range of a blind apparatus.

The technical problem of the present invention is not limited to the above-mentioned problems, and other technical problems which are not mentioned can be clearly understood by those skilled in the art from the following description.

A blind apparatus according to the present invention comprises: a frame; A winding roll which is axially coupled to the frame and rotates; A screen member wound or unwound on the winding roll; A holding member fixed to the winding roll and having a receiving space formed therein; a fixing member fixed to the frame and having a fixing shaft inserted into the housing space of the housing; and a fixing member having one end fixed to the fixing shaft, And a rotation restricting portion including a spiral spring whose other end is fixed to the housing, wherein the helical spring is in a state of being completely wound by being brought into close contact with the fixed shaft at a first position, And is in close contact with the inner circumferential surface of the housing at the second position, which is the lowering limit position of the screen member, to maintain the completely released state.

The spiral spring is formed by winding a band-shaped leaf spring having a width wider than the thickness, and can transmit the elastic force in a completely wound state or in a direction to maintain the completely unwound state.

The first position and the second position may be formed within an elastic limit of the spiral spring.

The magnitude of the elastic modulus can be increased or decreased in proportion to the thickness and width of the helical spring.

The housing may have a cylindrical shape in which the fixed shaft is located at the rotational center.

The distance between the first position and the second position of the screen member may be proportional to the distance between the rotation center and the inner circumferential surface of the housing.

The housing is inserted into the inside of the winding roll, and the outer circumferential portion of the housing and the inner circumferential portion of the winding roll are concavo-convexed to each other, so that the rotation of the housing and the winding roll can be synchronized.

The fixing member may further include a plurality of rotation guide bars extending radially from the fixing shaft and supporting an inner circumferential portion of the housing with an end portion thereof.

According to the present invention, the screen moving range of the blind device can be effectively limited with a relatively simple structure. It is possible to rotate the roller which winds and uncovers the screen very smoothly within the range of the screen movement and at the same time automatically stops the rotation at the required point to effectively restrict the movement of the screen. Accordingly, it is possible to prevent the device from being damaged or malfunction due to the movement of the screen beyond the design range or up to an undesired limit as in the conventional art. In addition, various effects can be obtained, such as driving and stopping the screen more conveniently with a reaction force provided according to the movement of the screen.

1 is a perspective view of a blind apparatus according to an embodiment of the present invention.
Fig. 2 is an exploded perspective view of the blind apparatus of Fig. 1;
3 is an exploded perspective view of a rotation restricting portion of the blind apparatus of FIG.
4 to 6 are cross-sectional views for explaining the operation of the rotation restricting portion.
Fig. 7 is an operation diagram illustrating the rising limit position and the falling limit position of the blind apparatus of Fig. 1;
8 is a perspective view of a blind apparatus according to another embodiment of the present invention.
Figs. 9 and 10 are longitudinal sectional views of a winding roll for explaining the operating process of the blind apparatus of Fig. 8; Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and methods for achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is only defined by the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, a blind apparatus according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 7. FIG.

FIG. 1 is a perspective view of a blind apparatus according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the blind apparatus of FIG. 1, and FIG. 3 is an exploded perspective view of a rotation restriction unit of the blind apparatus of FIG.

1 to 3, a blind apparatus 1 according to an embodiment of the present invention includes a frame 110, a take-up roll 100 which is axially coupled to the frame 110 and rotates, a take- A screen member 200 to be wound or unwinded, and a rotation restricting portion 300 for restricting rotation of the wind-up roll 100. The rotation restricting portion 300 is connected to the take-up roll 100 and the frame 110 to operate and includes a spiral spring (see 310 in FIG. 3). The spiral spring 310 is formed by winding a band-shaped leaf spring and is wound or unwound according to the rotation to limit the rising and falling positions of the screen member 200. The blind apparatus 1 of the present invention implements an effective rotation restraining structure with a relatively simple structure using the spiral spring 310. [

In particular, the helical spring 310 is held within the confined space until it is no longer windable, or it is loosened and fixed until it can no longer be unwound in the opposite direction. In other words, the rotation limiter 300 implements a rotation limit in both directions using both the winding and unwinding rotation of the spiral spring 310 within the limited space. The rotation restricting portion 300 may restrict the rotation of the spiral spring 310 by stopping the change of the diameter of the spiral spring 310 due to the limited accommodation space (see 321 in FIG. 3) As a result of this structure, a very compact and effective rotation restricting structure can be realized which limits the rotation of the winding roll 100 in both directions with this structure.

In addition, the helical spring 310 can provide a reaction force in the opposite direction of rotation in each rotation position by its own elastic force, and the effect of canceling the weight of the screen member 200 can be obtained by using the same. In this way, the blind apparatus 1 having the rotation restricting structure can effectively limit the range of movement of the screen member 200 and change the position of the screen member 200 more easily.

The frame 110 may be composed of a vertical frame 112 and a horizontal frame 111, as shown in FIGS. The vertical frame 112 and the horizontal frame 111 are detachably coupled to receive the winding roll 100 therein. The frame 110 may include a fixture such as a bracket on one side so as to be easily installed on an outer wall such as a window. The horizontal frame 111 may be formed so as to face both ends of the winding roll 100 and connect the vertical frame 112 therebetween. The structure and shape of the frame 110 may be changed into various other shapes.

The winding roll 100 is axially coupled to the frame 110 and rotates. The winding roll 100 can be coupled at both ends through a rotating structure using an axis. The shaft structure for rotatably fixing the winding roll 100 can be implemented in various forms. When the rotation restricting portion 300, the driving structure (driving reel, driving drum) and the like are inserted into both ends of the winding roll 100 as in the embodiment of the present invention, the rotation restricting portion 300, And can serve as a shaft for rotatably securing the roll 100. That is, the winding roll 100 may be axially coupled to the frame 110 through a structure rotatably connected to the frame 110 at both ends thereof. The winding roll 100 may be formed of an empty hollow cylindrical tubular member, and a more compact coupling structure can be formed by using the space inside.

The screen member 200 is wound or unwound on the take-up roll 100 to change its length. The upper surface of the screen member 200 is fixed to the outer periphery of the wind-up roll 100, and the weight member 210 is connected to the lower end of the screen member 200 to maintain tension. When the winding roll 100 is rotated in one direction, the screen member 200 is wound (wound up) by the winding roll 100 and the length of the extended portion is reduced. Further, when the winding roll 100 is rotated in the opposite direction, the screen member 200 is loosened (pulled out) from the winding roll 100 and the length of the unfolded portion is increased. That is, the screen member 200 can move up and down according to the rotation of the wind-up roll 100. The screen member 200 may be made of a fabric or may be made of various materials capable of shading.

A driving structure including a driving reel 121, a driving drum 122, a driving rod 120, and the like may be formed on one side of the winding roll 100. The driving drum 122 can rotate the winding roll 100 by the driving force transmitted to the driving reel 121 by the driving string 120. [ That is, when the drive string 120 is pulled to apply a tension, the drive reel 121 rotates and the drive drum 122 connected to the drive reel 121 can rotate the take-up roll 100 in the same direction. The driving drum 122 may be inserted and fixed inside the winding roll 100 and may be connected to the driving reel 121 in an axial direction. The driving reel 121 may be coupled to the coupling protrusion 112a formed on the frame 110 or the like.

However, the driving structure of the blind apparatus 1 need not be limited to this, and the driving structure may be changed and applied in various other forms. For example, an electric drive structure that moves the screen member 200 by a rotational force of a motor or the like may be applied, and a position is set by balancing the load of the screen member 200 and the weight member 210 without a motor or a driving rod A semi-automatic driving structure may be applied. That is, the blind apparatus 1 of the present invention need not be limitedly interpreted by the driving structure. Examples of other driving structures will be described in more detail with reference to other embodiments described later.

The rotation restricting portion 300 may be formed at one end of the winding roll 100 as shown in FIGS. As described above, the rotation limiting unit 300 can be used to set the rising limit position and the falling limit position of the screen member 200 so that the screen member 200 can be moved . The rotation restricting unit 300 includes a housing 320 fixed to the winding roll 100 and having a housing space 321 formed therein and a housing 320 fixed to the frame 110 and inserted into the housing space 321 of the housing 320 A fixing member 330 having a fixing shaft 331 and a fixing member 330 having one end 311 fixed to the fixing shaft 331 so that the fixing shaft 331 is wound plural times and the other end 312 is fixed to the housing 320 And includes a spiral spring. The spiral spring 310 can be formed to have a band-shaped leaf spring that is wider than the thickness (which may be measured in the radial direction from the fixed axis) and width (which may be measured in the lengthwise direction of the winding roll) have.

The spiral spring 310 is wound around the spiral portion and is closely contacted in the center direction (direction toward one end), or the spiral portion is released and adhered in the opposite direction (direction in the radial direction to the other end). That is, the helical spring 310 is in close contact with the fixed shaft 331 at the first position (see D1 in Fig. 7), which is the rising limit position of the screen member 200, (See D2 in Fig. 7), which is the lower limit restricting position, so as to maintain the completely released state. When the spiral spring 310 is completely wound, the spiral spring 310 is pressed tightly against the fixed shaft 331 and can not be further wound. In the completely unwound state, the spiral spring 310 is inserted into the inner peripheral surface of the housing 320 So that it can no longer be loosened. That is, the spiral spring 310 is blocked by the inner circumferential surface of the housing 320 in the radial direction within the limited accommodation space 321 inside the housing 320, and the compression in the center direction is blocked by the fixed shaft 331 Lt; / RTI > Thus, by using such a structure, an effective rotation limit can be set in both directions in which the spiral spring 310 is wound or unwound. The operation of the spiral spring 310 and the rotation restricting part 300 will be described later in more detail.

The housing 320 may be formed in a cylindrical shape having a fixed shaft 331 at a center of rotation as shown in the drawing, and may be inserted into the winding roll 100. The outer circumferential portion of the housing 320 and the inner circumferential portion of the winding roll 100 may be formed in a structure in which rotation is synchronized by concave-convex engagement with each other. The travel guide 101 protruding inward of the winding roll 100 is inserted into the space between the engaging pieces 322 formed on the outer peripheral portion of the housing 320 and is coupled to the housing 320 and the winding roll 100 Can be synchronized. A groove or the like is formed in the inner peripheral portion of the housing 320 to receive and fix the other end 312 of the spiral spring 310. The other end portion 312 of the helical spring 310 may be formed in the form of, for example, a clip or a ring to prevent the helical spring 310 from coming off.

The stationary member 330 includes a stationary shaft 331 inserted into the receiving space 321 of the housing 320. One end 311 of the spiral spring 310 is fixed to the fixed shaft 331. The fixed shaft 331 may also have a groove or the like to fix the one end 311 of the spiral spring 310. The one end 311 of the helical spring 310 may also be formed in a shape such as a clip or a ring to prevent the helical spring 310 from coming off. The fixing member 330 may include a plurality of rotation guide bars 332 extending radially from the central fixed shaft 331 and supporting the inner periphery of the housing 320 at the ends thereof. The rotation guide bar 332 supports the housing 320 from the inside of the housing 320 and reduces the contact area with the end of the guide bar 332 to minimize friction with the housing 320. The fixing member 330 may be formed in a variety of structures that are easy to rotate within the housing 320.

The fixing shaft 331 of the fixing member 330 can be fixed to the connection groove of the frame 110 (see 112a in FIG. The connection groove 112b may be formed in an angular shape to prevent rotation, and a part of the fixed shaft 331 may be formed in a corresponding shape. The other end 312 of the spiral spring 310 fixed to the housing 320 is fixed to the one end 311 of the spiral spring 310 fixed to the fixed shaft 331 because the fixed shaft 331 is fixed, It can rotate relatively. The rotation of the winding roll 100 is transmitted to the spiral spring 310 so that the one end 311 of the spiral spring 310 and the other end 311 of the spiral spring 310 are rotated together with the winding roll 100, The positional change between the other end portions 312 can be induced. In particular, the other end 312 of the helical spring 310 rotates on a concentric circle (the inner circumferential surface of the housing) away from the one end 311 fixed to the rotation center (fixed shaft) The spacing between the spirals can be changed by winding or unwinding. The bi-directional rotation restricting structure using the helical spring 310 can be implemented. Hereinafter, this will be described in more detail with reference to FIGS. 4 to 6. FIG.

4 to 6 are cross-sectional views for explaining the operation of the rotation restricting portion.

First, the spiral spring 310 is brought into close contact with the fixed shaft 331 at the first position D1, which is the rising limit position of the screen member 200, as shown in Figs. 4A and 4B, State. 4B is a state in which the above-described spiral spring 310 is completely wound, and FIG. 4A is a state of being rotated in a winding direction before the spiral spring 310 is completely wound. That is, it is possible to provide a driving force to the winding roll 100 to rotate the screen member 200 in the counterclockwise direction in the drawing so as to wind up the screen member 200. Accordingly, the housing 320 of the rotation restricting portion 300 rotates together with the other end portion 312 of the spiral spring 310 connected to the housing 320, as well. 4 (a), the spiral spring 310 is brought into close contact with the fixed shaft 331 and is completely wound, that is, is switched to a state in which it can not rotate any more, as shown in Fig. 4 (b) . In this state, the spiral spring 310 does not have a gap between the wound portions and can not be brought into close contact with each other, and rotation in the direction of winding the screen member 200 (counterclockwise in the drawing) is stopped. Therefore, as shown in FIG. 4B, the screen member 200 stops moving at the first position D1, which is the ascending limit position.

On the other hand, when the winding roll 100 is rotated in the clockwise direction in the drawing, the spiral spring 310 is released from the fixed shaft 331. 5, a part thereof is wound on the fixed shaft 331, and a part released from the fixed shaft 331 can be held in close contact with the inner peripheral surface of the housing 320. [ 5 is an intermediate state in which the spiral spring 310 is completely wound and completely loosened. That is, the winding roll 100 may be rotated so that the spiral spring 310 is completely wound or partially wound or loosened, not completely loosened. In this case, the winding roll 100 is not restricted by the rotation, and therefore can be rotated clockwise or counterclockwise in the figure. Therefore, the screen member 200 can be raised or lowered to adjust the length appropriately.

The spiral spring 310 can be unwound or rolled in accordance with the rotation of the winding roll 100 and the housing 320 synchronized with the rotation of the winding roll 100, and can transmit the elastic force. That is, it is possible to provide a reaction force to support the screen member 200 connected to the wind-up roll 100 by the elastic force of the spiral spring 310 formed by the leaf spring being curled. The elastic force can be transmitted in the fully wound state or in the fully unwound state. If the fully wound state is in the initial state as in the present embodiment, the elastic force is maintained in the wound state The elastic force can be transmitted. That is, as the length of the screen member 200 is increased by rotating the take-up roll 100 in the clockwise direction, the elastic force of the spiral spring 310 is increased in the opposite direction to help the screen member 200 maintain its position .

When the screen member 200 is further lowered in this state, it is possible to reach the second position D2 which is the lowering limit position of the screen member 200 as shown in Figs. 6A and 6B. 6 (b) is a state in which the above-described helical spring 310 is completely released, and FIG. 6 (a) shows a state in which the helical spring 310 is rotating in the unwinding direction before it is completely released. 6 (a), when the spiral spring 310 is released, the spiral spring 310 is released from the fixed shaft 331 and is expanded in the radial direction But is prevented from being expanded by the inner circumferential surface of the housing 320 in the limited accommodating space 321 in the housing 320. 6 (b), the helical spring 310 is brought into close contact with the inner circumferential surface of the housing 320 to maintain the completely released state. This state also prevents the rotation of the spiral spring 310 in the direction in which the screen member 200 is loosened (clockwise direction in the figure) because there is no gap between the portions of the spiral spring 310 that are in close contact with the inner circumferential surface of the housing 320. Therefore, as shown in FIG. 6 (b), the screen member 200 stops moving at the second position D2, which is the lowering limit position.

That is, by arranging the helical springs 310 that are wound a plurality of times in the limited accommodating space 321 inside the housing 320, the helical springs 310 can be restrained from loosening after a certain degree of loosening. Further, even when the spiral spring 310 is wound by using the fixed shaft 331, the spiral spring 310 can be restricted so as not to be further wound after a certain degree of winding. As described above, the rotation limit in both directions can be set for the rotation of the rotating structure connected to the spiral spring 310 by restricting the movement of the spiral spring 310 in both directions of unwinding or winding. It is possible to very easily form the rising limit position and the falling limit position of the screen member 200 wound or unwound from the winding roll 100.

The first limiting position and the second limiting position are formed within the elastic limit of the spiral spring 310. [ When the elastic limit is exceeded, the elastic modulus of the spiral spring 310 can be adjusted appropriately so that the spiral spring 310 may be deformed and the continuous winding or unwinding action may be difficult. That is, the rotation restricting part 300 of the present invention is formed so that the spiral spring 310 is at the elastic limit not only in the fully wound state (FIG. 4B) but also in the completely unwound state (FIG. 6B) So that both the winding and unwinding actions of the spiral spring 310 can be utilized up to the limit. Since the magnitude of the elastic modulus can be increased or decreased in proportion to the thickness and width of the spiral spring 310, the modulus of elasticity can be appropriately set in consideration of these parameters.

The rotation restricting part 300 limits the expansion of the spiral spring 310 to a limited space inside the housing 320 so that the distance between the rotation center and the inner circumferential surface of the housing 320, The area in which the spiral spring 310 can be moved (wound and unwound) can be proportionally increased or decreased in proportion to the size of the space allowing the expansion (unwinding). Accordingly, the movable distance (the distance between the first position and the second position) of the screen member 200 can also be increased or decreased in proportion to the distance between the rotation center and the inner peripheral surface of the housing 320. The movement range L of the screen member 200 can also be appropriately adjusted.

The limit of the flow (winding and unwinding) of the spiral spring 310 may vary depending on the size of the spiral spring 310 occupying the inside of the accommodation space 321, that is, the total length of the spiral spring 310, It is possible to more effectively set the first position and the second position by using the helical spring 310 wound in an appropriate number of times and to restrict the moving range of the screen member 200. [ For example, the number of times the spiral spring 310 is wound can be set to the same number of times as the number of rotations of the winding roll 100 during movement between the first position and the second position.

In this way, the rotation limit can be set and the movement of the screen member 200 can be effectively restricted. The rotation limiter 300 is used to set the first position D1 as the rising limit position and the second position D2 as the falling limit position of the screen member 200 as shown in FIG. The position of the screen member 200 may be appropriately changed within the range of movement L between the first position D1 and the second position D2. The rotation of the winding roll 100 is automatically stopped by the action of the rotation restricting part 300 including the spiral spring 310 as described above so that even when a driving force greater than necessary is transmitted, The screen member 200 also automatically stops at the first position D1 and the second position D2 and the movement is restricted. Therefore, it is possible to solve the problem that the screen member 200 is moved to an extent exceeding the design range or to an undesired extent, such that the apparatus is broken or malfunctions can be easily solved, and the apparatus can be used more conveniently and safely.

Hereinafter, a blind apparatus according to another embodiment of the present invention will be described in detail with reference to FIGS. 8 to 10. FIG. In the following description, the same reference numerals will be used throughout the drawings to refer to the same or like parts.

FIG. 8 is a perspective view of a blind apparatus according to another embodiment of the present invention, and FIGS. 9 and 10 are longitudinal sectional views of a take-up roll for explaining the operation of the blind apparatus of FIG.

8 to 10, a blind apparatus 1-1 according to another embodiment of the present invention is connected to a lower end of a screen member 200, and a screen member 200 is attached to a take-up roll 100 by gravity A weight member 210 for applying a torque (refer to T1 in Figs. 9 and 10) in a first direction to be wound and a second direction (Fig. 9 And T2 shown in Fig. 10) of the elastic member (see 400 in Figs. 9 and 10).

The blind apparatus 1-1 according to another embodiment of the present invention can be adjusted very easily by using the torques T1 and T2 which are increased or decreased according to the length of the screen member 200 to be widened and acting in opposite directions . The blind device 1-1 according to another embodiment of the present invention can easily release the balance state by applying a minimum external force (a method of simply touching a screen member, a weight member, or the like), and adjust the length of the screen member 200 And the changed length of the screen member 200 can be easily maintained by switching the external force to the balanced state. Therefore, as shown in FIG. 8, the driving rope and the like are completely removed, and the appearance is very simple.

The elastic member 400 can be received inside the winding roll 100 as shown in Figs. The elastic member 400 may be formed of a torsional elastic body that elastically deforms in accordance with rotation of the winding roll 100 to store elastic energy, and the torsional elastic body may be a coil spring. The amount of deformation of the elastic member 400 corresponding to the rotation of the winding roll 100 is increased, and thus the restoring force is also increased. The restoring force acts in the opposite direction to the rotation that caused the deformation, so it creates a rotating force in the opposite direction. For example, when the screen member 200 is unwound, the rotational force in the winding direction, which is the opposite direction as the winding roll 100 is rotated in the winding direction, is increased by the elastic force. At the same time, the weight of the weight member 210 and the weight of the screen member 200 are added together because the screen member 200 is stretched and elongated, so that the rotational direction of the screen member 200 in the unwinding direction (the above-described first direction) Accordingly, the first direction rotational force (torque) and the second direction rotational force (torque) are increased while being balanced with each other. By this balance of the rotational force, the winding roll 100 can be easily rotated without a cord and can be easily stopped at the rotational position.

The elastic member 400 may be connected between the connection shaft 420 and the winding roll 100 to induce torque. The elastic member 400 may be connected to the winding roll 100 through a rotating block that is coupled to the winding roll 100 and rotates, for example. The elastic member 400 may be connected to the rotation block 410 and the connection shaft 420 at both ends, respectively, as shown in Figs. The connection shaft 420 can be coupled through the rotation center of the rotation block 410 and the holder 411 formed on the outer peripheral portion of the rotation block 410 can be engaged with the travel guide 101), so that the winding roll 100 and the rotating block 410 can be synchronized and rotated together. The connection shaft 420 is fixed to the fixing structure of the coupling protrusion or the like protruding from the frame 110 by using the fixing portion 421 and is wound around the winding roll 422 by using the rotation ring 422 coupled around the fixing portion 421. [ 100 can be rotatably supported.

Due to this structure, when the winding roll 100 rotates, the rotation block 410 rotates together and one end of the elastic member 400 connected to the rotation block 410 can be twisted and deformed. Since the connecting shaft 420 rotatably supports the winding roll 100 but does not rotate by itself, the other end of the elastic member 400 fixed to the connecting shaft 420 maintains a fixed state. Therefore, the elastic member 400 is twisted between one end and the other end, and elastic energy is stored. The elastic member 400 can be formed in this manner. However, the manner of forming the elastic member 400 is not limited to this, and it is also possible to change the installation structure of the elastic member 400 in a different form to apply a rotational force to the wind-up roll 100 It is possible.

By using the elastic member 400, the screen member 200 can be pulled out as shown in Fig. 9 (b). At this time, the winding roll 100 is rotated as shown in FIG. 9 (a) so that the rotating block 410 combined with the winding roll 100 rotates together. Therefore, the elastic member 400 connected to the rotation block 410 is deformed and elastic energy is stored. Deformation occurs in the elastic member 400 corresponding to the length of the elongated screen member 200, which increases the restoring force. The restoring force acts as the second direction torque T2 as shown in Fig. 9 (b).

At the same time, the first direction torque T1 is also increased. In addition to the load of the weight member 210, the load corresponding to the length of the screen member 200 is increased, thereby enhancing gravity. Accordingly, the tension applied to the screen member 200 by gravity is increased and the increased tension acts as the first directional torque T1. The first direction torque T1 is generated in a direction completely opposite to the second direction torque T2 and can be balanced. The elastic modulus of the elastic member 400 may be adjusted or the load of the weight member 210 may be adjusted so that the magnitudes of the first directional torque T1 and the second directional torque T2 are equal to each other.

This operation also proceeds according to the same principle when the screen member 200 is wound as shown in Fig. When the screen member 200 is wound as shown in FIG. 10 (b), the winding roll 100 rotates in the opposite direction as shown in FIG. 10 (a), and the elastic member 400 is deformed The original shape is restored, the stored elastic energy is reduced, and the restoring force is also reduced. Accordingly, the second direction torque T2 is correspondingly reduced. In addition, the length of the screen member 200 is reduced so that gravity acts only on the weight of the weight member 210, thereby correspondingly reducing the first directional torque T1 applied to the winding roll 100. Accordingly, the first direction torque T1 and the second direction torque T2 are also balanced and the stopping state of the winding roll 100 can be maintained.

That is, the first direction torque T1 and the second direction torque T2 can be increased or decreased in a balanced manner with each other and the position of the winding roll 100 can be maintained in any case in which the screen member 200 is wound or wound . The user can easily adjust the length of the screen member 200 by providing only a minimum external force enough to release the balance state and can keep the screen member 200 at a desired length by removing it at a desired point. Such an operation can be accomplished very easily by simply touching and raising or lowering the screen member 200, the weight member 210 connected to the screen member 200, and the like. Therefore, it is possible to realize a use environment that is greatly improved by using the blind apparatus 1-1 of the present invention.

The blind apparatus 1-1 driven in this way can also effectively limit the moving range L of the screen member 200 by using the rotation restricting unit 300 described above. Since the rotation restricting part 300 is connected to the take-up roll 100 and moves together to prevent the rotation, the rotation restricting part 300 is used to restrict rotation of the take-up roll 100 to the first position D1 It is possible to set the second position D2 (falling limit position) and appropriately change the position of the screen member 200 within the movement range L between the first position D1 and the second position D2 have. The rotation of the winding roll 100 is automatically stopped by the action of the rotation restricting part 300 including the spiral spring 310 so that the screen member 200 connected to the winding roll 100 is automatically stopped, It also automatically stops at the first position D1 and the second position D2 and the movement is restricted. Therefore, it is possible to solve the problem that the screen member 200 is moved to an extent exceeding the design range or to an undesired extent, such that the apparatus is broken or malfunctions can be easily solved, and the apparatus can be used more conveniently and safely.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1, 1-1: Blind apparatus 100: Winding roll
101: travel guide 110: frame
111: Horizontal frame 112: Vertical frame
112a: connection protrusion 112b: connection groove
120: drive line 121: drive reel
122: driving drum 200: screen member
210: weight member 300: rotation restricting portion
310: helical spring 311: helical spring one end
312: helical spring non-end portion 320: housing
321: accommodation space 322:
330: fixing member 331: fixed shaft
332: rotation guide bar 400: elastic member
410: rotating block 411: holder
420: connection shaft 421:
422: rotating ring
D1: first position D2: second position
L: Moving range

Claims (8)

frame;
A winding roll which is axially coupled to the frame and rotates;
A screen member wound or unwound on the winding roll;
A housing fixed to the winding roll and having a housing space formed therein,
A fixing member fixed to the frame and having a fixing shaft inserted into a receiving space of the housing,
And a rotation restricting part including a spiral spring whose one end is fixed to the fixed shaft and the fixed shaft is wound multiple times and the other end is fixed to the housing,
Wherein the helical spring is in a completely wound state in close contact with the fixed shaft at a first position which is a rising limit position of the screen member and is in close contact with the inner peripheral surface of the housing at a second position, A blind device that maintains the unfolded condition. The method according to claim 1,
The spiral spring is formed by winding a band-shaped leaf spring having a width wider than the thickness, and transmits the elastic force in a fully wound state or in a direction to maintain the completely unwound state. The method according to claim 1,
Wherein the first position and the second position are formed within an elastic limit of the spiral spring. The method according to claim 1,
Wherein a magnitude of the elastic modulus is increased or decreased in proportion to the thickness and width of the helical spring. The method according to claim 1,
Wherein the housing has a cylindrical shape with the fixed shaft located at the rotational center. 6. The method of claim 5,
Wherein the distance between the first position and the second position of the screen member is proportional to the distance between the rotation center and the inner circumferential surface of the housing. The method according to claim 1,
Wherein the housing is inserted into the inside of the wind-up roll, and the outer periphery of the housing and the inner periphery of the wind-up roll are concavo-convexed to each other to synchronize the rotation of the housing and the wind-up roll. The method according to claim 1,
Wherein the fixing member further includes a plurality of rotation guide bars extending radially from the fixed shaft and supporting an inner circumference of the housing with an end thereof.

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