Wire umbrella

Abstract

To provide a wire type umbrella with a simplified structure, a reduced weight and a reduced manufacturing cost due to unfolding and folding wires.SOLUTION: Provided is a wire type umbrella including a central shaft, a top notch (11) arranged on an upper part of the central shaft, a runner (20) slidably fitted into the central shaft, and umbrella ribs (13) connected to the top notch (11) and the runner (20). The umbrella comprises: an unfolding wire (31) for unfolding the umbrella by having one end thereof fixed to the runner (20) and pulling up the runner (20) toward the top notch (11); a folding wire (33) for folding the umbrella by having one end thereof fixed to the runner (20) and pulling down the runner (20) to a lower part of the central shaft; a pulley (40) to which the other ends of both wires (31) and (33) are fixed and in which unwinding and winding of both wires (31) and (33) are reversed by the rotation; and a tension part in which both wires (31) and (33) maintain tension and the unwinding and the winding can be performed by the pulley 40.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to the technical field of umbrellas, and in particular to a wire-type umbrella in which the folding / unfolding mechanism of the umbrella is realized with two unfolding / folding wires, and each wire maintains tension, thereby simplifying the structure, reducing weight, and reducing manufacturing costs, and even in the case of an electric automatic umbrella, it is possible to manually open and close the umbrella. [Background technology]

[0002] Umbrellas are no longer just for protection from the rain; their uses and types are becoming increasingly diverse, including parasols, golf umbrellas, manual umbrellas, and automatic umbrellas.

[0003] Conventionally used manual umbrellas are composed of ribs, a center pole, a handle, etc., and the user can open or fold the umbrella by directly pushing up or pulling down the wheel. This manual method is used to fold the umbrella by storing a restoring force when opening the umbrella by installing multiple springs between the ribs, but it is inconvenient for the user because he or she must also apply force to store the restoring force when opening the umbrella.

[0004] On the other hand, automatic umbrellas have a thread-like connecting member and multiple gear trains inside the umbrella pole, a drive motor for driving these is installed in the handle, and the umbrella can be opened or folded by pressing a button. However, this automatic method requires a force to pull (or compress) the spring in addition to the force required for the above connecting members and gear train operation, so a drive motor with high torque must be used, which increases manufacturing costs and consumes a large amount of battery power, resulting in the inconvenience of frequent replacement and charging.

[0005] In addition, as disclosed in Korean Patent Publication No. 10-2023-0042361 "Fully Automatic Opening and Closing Umbrella," the reliability of the opening and closing operation can be improved by using a rack, worm gear, gear belt, etc. However, the power transmission configuration is complex and has many parts, making assembly difficult and increasing manufacturing costs. In addition, many components must be installed inside the center rod, which makes the center rod larger, heavier, and less user-friendly. Summary of the Invention [Problem to be solved by the invention]

[0006] Therefore, an object of the present invention is to provide a wire-type umbrella whose folding / unfolding mechanism can be realized with two unfolding / folding wires, thereby simplifying the structure and reducing the weight, thereby reducing manufacturing costs.

[0007] Another object of the present invention is to provide a wire-type umbrella that can correct any change in length of the unfolding wire and / or folding wire due to use or other reasons through the tension section, thereby preventing malfunction of the umbrella and improving the reliability and durability of the product.

[0008] Another object of the present invention is to provide a wire-type umbrella that is extremely easy to realize because it is only necessary to provide rotational force to the pulley, even when applied to an automatic umbrella using a drive motor, etc., and in particular, when a double pulley is used, it can be operated with a single drive unit, and not only can it reduce manufacturing costs, weight, and volume, but it can also minimize the power required to open and close the umbrella, maximizing the usage time. [Means for solving the problem]

[0009] In order to achieve the above object, the wire-type umbrella of the present invention includes a center rod, a roller located on the upper part of the center rod, a roller slidably fitted to the center rod, and ribs connected to the roller and the roller, and further includes an unfolding wire, one end of which is fixed to the roller and configured to open the umbrella by pulling the roller toward the roller, a folding wire, one end of which is fixed to the roller and configured to pull the roller downward to the lower part of the center rod to fold the umbrella, pulleys disposed on the lower part of the center rod to which the other ends of the unfolding wires and the folding wires are fixed and which reverse the unwinding and winding of the unfolding wires and the folding wires as they are rotated, and a tensioning section that allows the unfolding wires and the folding wires to be unwound and wound around the pulleys while maintaining tension.

[0010] The tension portion may be constituted by an elastic member provided between one end of either or both of the unfolding wire and the folding wire and a fixed point of the runner.

[0011] The tension portion may be configured by an elastic member provided on one side of the unfolding wire or the folding wire, or both, that is not wound around the pulley.

[0012] Alternatively, the tensioner may further include a handle portion provided at the lower end of the middle rod, the pulley being provided inside the handle portion, and the tensioner being disposed between the pulley and the lower end of the middle rod. In this case, the tensioner may further include a guide pin provided in the handle portion for guiding one or both of the unfolding wire and the folding wire extending from the pulley to the lower end of the middle rod, and the tensioner may be constituted by an elastic member provided between the guide pin and one or both of the unfolding wire and the folding wire.

[0013] Here, the pulley may be configured with two pulleys, one for each of the unfolding wire and the folding wire, or may be configured as a double pulley in which the unfolding wire and the folding wire are wound in opposite directions, so that the unwinding and winding of the unfolding wire and the folding wire are reversed depending on the direction of rotation.

[0014] Here, the device may further include a handle portion provided at the lower end of the center rod, and the handle portion may further include the pulley, a drive portion for rotating the pulley, and an operating portion for operating the drive portion.

[0015] Here, the umbrella may be configured so that the umbrella can be opened or folded by manually pushing up or pulling down the wheel when no power is supplied to the drive motor.

[0016] Here, the umbrella may further include a deployment fixing part that fixes the deployed state of the umbrella. Effect of the Invention

[0017] According to the wire-type umbrella of the present invention, the mechanism for folding and unfolding the umbrella is realized using two unfolding wires and a folding wire, which simplifies the configuration and reduces manufacturing costs, and the characteristics of the wires allow for a lightweight and compact umbrella.

[0018] Furthermore, according to the wire-type umbrella of the present invention, even when applied to an automatic umbrella using a drive motor, etc., it is only necessary to provide rotational force to the pulley, making it extremely easy to realize an automatic umbrella. In particular, when using a double pulley, it is possible to operate it with a single drive unit, which not only reduces manufacturing costs and reduces weight and volume, but also minimizes the power required to open and close the umbrella, maximizing usage time.

[0019] In addition, with the wire-type umbrella of the present invention, the user can open and close the umbrella by pushing up and pulling down the wheel, just like a manual umbrella, so it can be used even when the power source for the drive unit is discharged, maximizing convenience for the user.

[0020] Therefore, according to the wire-type umbrella of the present invention, even if the length of either or both of the unfolding wire and the folding wire changes due to use or other reasons, this can be corrected via the tension section, thereby preventing malfunction of the umbrella and improving the reliability and durability of the product.

[0021] In addition, the wire-type umbrella according to the present invention can offset local loads caused by sudden umbrella operation or localized excessive pulling force, which has the advantage of preventing wire breakage, minimizing damage, and increasing durability. [Brief description of the drawings]

[0022] [Figure 1] FIG. 2 is a schematic diagram of an unfolded wire-type umbrella according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic diagram of a wire-type umbrella according to one embodiment of the present invention folded. [Diagram 3] FIG. 2 is a perspective view of the wheel side according to one embodiment of the present invention. [Figure 4] FIG. 2 is a perspective view of the hand portion side according to an embodiment of the present invention. [Diagram 5] FIG. 4 is an enlarged view of a main part of a tension portion according to an embodiment of the present invention. [Figure 6] 11A to 11C are conceptual diagrams relating to the operation of a deployment fixing part according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] The advantages and features of the present invention, as well as the method of achieving the same, will become apparent with reference to the following detailed embodiments together with the accompanying drawings. However, the following embodiments are provided to enable a clear and complete understanding of the technical concept of the present invention, and the present invention is not limited to the embodiments presented, and may be embodied in various other forms.

[0024] The terms used in this specification are merely used to describe certain embodiments and are not intended to limit the present invention. For example, the singular expressions in this specification include the plural expressions unless the context clearly indicates otherwise. Furthermore, the terms "comprise" or "have" in this specification are intended to specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and are not intended to exclude the presence or additional possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof, and should not be interpreted as excluding them unless the exclusion is specifically specified.

[0025] The terms used in this specification are for describing the embodiments and are not intended to limit the present invention. Therefore, when a component is described as being "connected" to another component, it may be directly connected to the other component unless the expression is described as being "directly connected", but it should be understood that there may be another component in between. In addition, the singular form in this specification also includes the plural form unless otherwise specified in the context.

[0026] In this specification, the term "and / or" is interpreted to mean that it may include both of the configurations described before and after it, or may include only one of the configurations. For example, the term "configuration 3 is provided at one end of configuration 1 and / or configuration 2" means that configuration 3 can be provided at either configuration 1 or configuration 2, or at both configurations 1 and 2.

[0027] Meanwhile, all terms used (including technical and scientific terms) basically have the same meaning as generally understood by a person having ordinary knowledge in the field to which the present invention belongs, unless otherwise defined. However, each term described below is defined in consideration of the function in the embodiment of the present invention, and since this varies depending on the intention or practice of the user or operator, the clear definition of the term should be interpreted preferentially based on the contents of the entire specification.

[0028] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0029] The wire-type umbrella 1 according to one embodiment of the present invention is an umbrella comprising a center pole 10, a top roller 11 provided on the upper part of the center pole 10, a bottom roller 20 slidably fitted to the center pole 10, and ribs 13 connected to the top roller 11 and the bottom roller 20. The umbrella also comprises an unfolding wire 31, a folding wire 33, a pulley 40, and a tensioning section 50 which causes the pulley 40 to unwind and rewind while maintaining tension on each of the unfolding wires 31 and folding wires 33.

[0030] One end of the deployment wire 31 is fixed to the lower wheel 20, and the umbrella opens when the lower wheel 20 is pulled up toward the upper wheel 11.

[0031] 1 and 2, one end of the unfolding wire 31 is fixed to the runner 20, and the other end is introduced into the center rod 10 through the upper via point 15 on one side of the upper part of the center rod 10, and then fixed to the pulley 40. Therefore, as shown in Fig. 2, when the pulley 40 rotates and winds up the unfolding wire 31 in a folded state, the runner 20 to which one end of the unfolding wire 31 is fixed is pulled up toward the runner 11, and the umbrella opens, as shown in Fig. 1.

[0032] Here, as long as both ends of the deployment wire 31 according to the present invention are fixed to the runner 20 and the pulley 40, respectively, and the runner 20 can be raised, various routing methods using various route points, additional components, etc. can be used without limitation, and it is clear that such various modified examples fall within the scope of the present invention.

[0033] In one embodiment, the deployment wire 31 can be exposed to the outside of the center pole 10 between the runner 20 and the upper pass-through point 15, and in this case, the wire guide 16 can be disposed outside the center pole 10 as shown in Fig. 3. In addition, various known configurations may be added to the exposed section to prevent damage such as breakage of the deployment wire 31 due to interference with other configurations such as the ribs 13, and to prevent deterioration of the appearance due to exposure.

[0034] In the present invention, the material of the deployment wire 31 (including the folding wire 33 described below) can be of various known types as long as it can be wound and unwound around the pulley 40. Generally, a material that does not stretch in the longitudinal direction is used, but this does not exclude stretchable materials, and it is of course possible to use stretchable materials in some cases (depending on the degree of stretchability, etc.).

[0035] One end of the folding wire 33 is fixed to the lower wheel 20, and the lower wheel 20 is pulled down to the bottom of the center pole 10 so that the umbrella is folded. In one embodiment, the folding wire 33 is fixed to the lower wheel 20 at one end and extends downward and is fixed to the pulley 40 at the other end, as shown in Figures 1 and 2. As a result, when the pulley 40 rotates to wind the folding wire 33, the lower wheel 20 is pulled down to the bottom of the center pole 10.

[0036] As with the above-mentioned unfolding wire 31, the folding wire 33 of the present invention may be routed in various ways without limitation as long as it can pull the runner 20 downward when fixed at both ends and wound. For example, the folding wire 33 may extend inside the center rod 10, pass through one or more route points, be exposed to the outside of the center rod 10, and then be fixed to the runner 20.

[0037] Also, as shown in FIG. 1, the folding wire 33 may extend directly to the outside of the middle rod 10 without passing through the inside of the middle rod 10 and be fixed to the runner 20. In this case, if the folding wire 33 is exposed to the outside of the middle rod 10, there is a risk of breakage, and interference with other components may occur, causing malfunctions, and there is a problem of degraded appearance. For this reason, as shown in FIG. 3 and FIG. 4, a wire guide 16 for accommodating the folding wire 33 can be provided on the outside of the middle rod 10. As a result, the folding wire 33 extending from the pulley 40 is drawn into the wire guide 16 from the lower end of the middle rod 10 and extends, and is drawn out to the outside of the runner 20 along the intermediate pulley 23 provided on the runner 20 and fixed to the fixing point 21b. Here, the wire guide 16 can of course be modified in various ways other than the embodiment shown in FIG. 3. Meanwhile, the above-mentioned wire guide 16 can also be applied to the section in which the above-mentioned deployment wire 31 is exposed to the outside of the middle rod 10.

[0038] The pulley 40 is disposed on one side of the lower part of the center rod 10, and the other ends of each of the unfolding wires 31 and the folding wires 33 are fixed thereto so that the unfolding wires 31 and the folding wires 33 are rewound or wound in opposite directions, respectively, in response to rotation.

[0039] Here, when the handle portion 60 is provided at the lower end of the center rod 10, the pulley 40 can be disposed within the handle portion 60. However, the position of the pulley 40 is not limited to the inside of the handle portion 60, and it can be disposed in various positions, such as outside the handle portion 60, and the pulley 40 corresponding to either the unfolding wire 31 or the folding wire 33 can be disposed within the handle portion 60, and the other can be disposed outside the handle portion 60, and the positions can be changed as necessary.

[0040] The pulleys 40 can be arranged in various types. In one embodiment, two pulleys 40 may be provided corresponding to the unfolding wire 31 and the folding wire 33, respectively. In this case, two drive units 63 for driving the rotation of each pulley 40 may be provided.

[0041] In another embodiment shown in Fig. 4, the pulley 40 may be arranged as a double pulley 40 in which the unfolding wire 31 and the folding wire 33 are wound in opposite directions, and the unfolding wire 31 and the folding wire 33 are unwound and wound in opposite directions according to the direction of rotation. In this case, the unfolding wire 31 and the folding wire 33 form one loop (closed curve) with the sled 20 and the pulley 40 at both ends, and the unfolding wire 31 and the folding wire 33 are unwound or wound in opposite directions according to the rotation of the pulley 40, and the umbrella can be opened or folded by performing the operation of lifting or lowering the sled 20. Therefore, the wire-type umbrella according to the present invention realizes the mechanism for folding and unfolding the umbrella with two unfolding wires 31 and folding wires 33, which simplifies the configuration, reduces manufacturing costs, and allows for weight reduction and size reduction due to the characteristics of the wire.

[0042] Meanwhile, the wire-type umbrella 1 according to one embodiment of the present invention can be realized as an automatic umbrella that rotates the pulley 40 via the drive unit 63. In one embodiment, the drive unit 63 can include, for example, a drive motor that rotates the pulley 40, a power supply unit, and an operation unit 65 for operating the drive motor. In this case, when the handle unit 60 is provided at the lower end of the center rod 10, the pulley 40 and the drive unit 63 can be provided inside the handle unit 60, and the operation unit 65 can be installed outside the handle unit 60. In addition, the above-mentioned power supply unit may be provided with a terminal so that it can be charged from the outside, or the power supply unit may be provided so that it can be separated from the handle unit 60 and charged.

[0043] Here, when power is not being supplied from the power supply unit to the driving motor, or when the power supply unit is discharged, the driving unit 63 can be configured not to restrict the rotation of the pulley 40. In this case, the user can open and close the umbrella by pushing up or pulling the wheel 20 like a manual umbrella, so that the umbrella can be used as both an automatic umbrella and a manual umbrella, maximizing the convenience of the user.

[0044] Furthermore, according to the wire-type umbrella of the present invention, even when applied to an automatic umbrella using a drive motor, it is extremely easy to realize an automatic umbrella, since it is only necessary to provide rotational force to the pulley 40. In particular, when using a double pulley, it is possible to operate it with one drive unit, which not only reduces manufacturing costs and reduces weight and volume, but also minimizes the power required for opening and closing the umbrella, maximizing usage time.

[0045] On the other hand, it is possible to provide an expansion fixing part that fixes the expanded state of the umbrella 1. The expansion fixing part prevents the lower wheel 20 from being pushed down below the center pole 10 by the weight of the ribs 13 and the fabric when the umbrella 1 is open.

[0046] The deployment fixing portion may be of various known types without limitation, and may include, for example, an elastic protrusion 71 provided on one side of the runner 20 facing the center pole 10 so as to be elastically pulled out and retracted, and an insertion hole (not shown) provided on one side of the center pole 10 corresponding to the position of the runner 20 when the umbrella is deployed.

[0047] As one embodiment, referring to Figure 6, the runner 20 can be configured as an internal runner 20a that slidably fits onto the outside of the center rod 10, and an external runner 20b that is provided on the outside of the internal runner 20a and is capable of moving up and down relative to the internal runner 20a by a set distance.

[0048] On the other hand, one ends of the unfolding wire 31 and the folding wire 33 are both fixed to one side of the outer runner 20b as shown in FIG.

[0049] Here, the movement of the internal lowering roller 20a and the external lowering roller 20b when the umbrella 1 is unfolded and folded will be explained. First, when the umbrella 1 is folded, the internal lowering roller 20a and the external lowering roller 20b are separated from each other as shown in Fig. 6(b). Therefore, when the umbrella is opened, the external lowering roller 20b is first raised by the unfolding wire 31, and when the external lowering roller 20b and the internal lowering roller 20a are in contact with each other as shown in Fig. 6(a), the external lowering roller 20b and the internal lowering roller 20a rise together along the center pole 10. Conversely, when the umbrella is folded, the external lowering roller 20b is first lowered by the folding wire 33, and after being separated by the above-mentioned set distance, the internal lowering roller 20a and the external lowering roller 20b fall together along the center pole 10.

[0050] In this embodiment, the unfolded fixing portion includes an insertion hole (not shown) provided on one side of the center pole 10 corresponding to the position of the external runner 20b when the umbrella is unfolded, and an elastic protrusion 71 provided on the internal runner 20a that is pulled out and in to the insertion hole.

[0051] The elastic protrusion 71 is located within the set distance in the state of Fig. 6(b), and there is no interference between the elastic protrusion 71 and the external sling 20b in the state of Fig. 6(b). Then, when the umbrella is opened as shown in Fig. 6(a), it is interfered with (pressurized by) the external sling 20b, which is raised by the deployment wire 31, and is pulled into the insertion hole. In this way, the deployed state of the umbrella is fixed.

[0052] Conversely, as shown in Figure 6(b), when the umbrella is folded, the external runner 20b descends first and the interference (pressure) with the elastic protrusion 71 is released, and the elastic protrusion 71 is pulled out of the insertion hole by its elastic force, and then the internal runner 20a and the external runner 20b both descend to the bottom of the center rod 10.

[0053] Here, it goes without saying that as long as the position of the external runner 20b is fixed when the umbrella is in the unfolded state by interference (such as the above-mentioned pressure application) and release accompanying the relative movement of the external runner 20b, this is not limited to the above-mentioned embodiment and various modifications are possible.

[0054] Therefore, in the case of an automatic umbrella equipped with the drive unit 63, the inserted protrusion supports the unfolded state when the umbrella is unfolded, so there is no need for a separate drive to maintain the unfolded state with the drive unit 63, minimizing power consumption and maximizing usage time. Also, when used as a manual umbrella without the drive unit 63, the unfolded state is maintained by the unfolding fixing part, so there is an advantage that the user does not need to support the wheel 20.

[0055] The tensioning unit 50 ensures that each of the unfolding wires 31 and folding wires 33 is unwound and wound around the pulley 40 while maintaining tension. The tensioning unit 50 functions to correct the change in the length of each wire that was initially set according to the extension or contraction of the unfolding wires 31 and / or folding wires 33 or the change in the position of other configurations. For example, if the length of either the unfolding wires 31 or the folding wires 33 changes due to use or other reasons, either wire may not be completely unwound from the pulley 40 or may be further unwound, so that the sled 20 may not be located at the designated unfolding or folding position, making it impossible to open or close the umbrella. In addition, even if the umbrella can be opened or closed, the sled 20 may not be fixed in the folded or unfolded state, and the value of the product may decrease, such as by drifting. Therefore, the tensioning unit 50 applies tension to each of the unfolding wires 31 and folding wires 33 to correct the length.

[0056] The tensioning section 50 can be provided in various types, for example, as shown in Fig. 3, it can be configured as an elastic member provided between one end of the unfolding wire 31 and / or folding wire 33 and the fixed point 21 of the runner 20. This allows each wire to maintain tension as the elastic member expands and contracts in response to the expansion and contraction of the wire. Here, Fig. 3 shows the tensioning section 50 on the folding wire 33 side, but it goes without saying that the same or a similar configuration can be applied to the unfolding wire 31 side.

[0057] 5, tensioning section 50 may be provided on the side of unfolding wire 31 and / or folding wire 33 that is not wound around pulley 40. For example, in the case of unfolding wire 31, tensioning section 50 may be provided with an elastic member similar to that in FIG. 5 between the fixed point on the runner 20 side and the section that is not wound around pulley 40.

[0058] In addition, when the pulley 40 is provided inside the handle portion 60, the tension portion 50 may be disposed between the pulley 40 and the lower end of the center rod 10.

[0059] 4, a guide pin 61 for guiding the unfolding wire 31 and / or the folding wire 33 extending from the pulley 40 to the lower end of the center rod 10 may be disposed within the handle portion 60. In this case, the tension portion 50 may be configured with an elastic member disposed between the guide pin 61 and the unfolding wire 31 and / or the folding wire 33. That is, one end of the elastic member 50 is fixed to the guide pin 61a, and the other end is connected in a ring shape to allow the folding wire 33 to move. When the folding wire 33 becomes longer, the wire is pulled toward the guide pin 61a to adjust the extension or contraction, and when the folding wire 33 becomes shorter, the length of the folding wire 33 can be adjusted to be in a straight line.

[0060] Therefore, according to the wire-type umbrella of the present invention, even if the length of the unfolding wire and / or folding wire changes due to use or other reasons, this can be corrected via the tension section, thereby preventing malfunction of the umbrella and improving the reliability and durability of the product.

[0061] In addition, the tension section 50 can absorb excess tensile force or local load near the intermediate point that is temporarily applied to the wire due to sudden umbrella operation, such as when the pulley 40 starts to rotate, thereby preventing breakage of the wire, minimizing damage and improving durability.

[0062] Although the present invention has been described above with reference to the limited embodiment and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations can be made by those having ordinary skill in the art to which the present invention pertains within the technical spirit of the present invention and the equivalent scope of the claims. Therefore, the disclosed embodiments should be considered from an explanatory perspective, not a limiting one. The scope of the present invention is shown in the claims, not in the above description, and all differences within the equivalent scope should be interpreted as being included in the present invention. [Explanation of symbols]

[0063] 1. Wire umbrella 10 Middle pole 11 Upper Wheel 13 Umbrella bone 15 Upper Waypoint 16 Wire Guide 20 Wheel Throwing 20a Internal wheel 20b External wheel 21, 21a, 21b fixed points 23 Transit Pulley 31 Deployment Wire 33 Folding wire 40 Pulley 50 Tension section 60 Hand part 61 Guide pin 63 Drive unit 65 Operation section 71 Elastic protrusion

Claims

1. An umbrella including a center pole, a top roller disposed on the top of the center pole, a bottom roller slidably fitted to the center pole, and ribs connected to the top roller and the bottom roller, an unfolding wire, one end of which is fixed to the lower wheel and which pulls the lower wheel toward the upper wheel to open the umbrella; a folding wire, one end of which is fixed to the lower wheel and which pulls the lower wheel downward to the bottom of the center pole to fold the umbrella; A pulley is disposed on the lower side of the center rod, the other end of each of the unfolding wires and the folding wires is fixed to the pulley, and the unwinding and winding of the unfolding wires and the folding wires are reversed according to the rotation of the pulley; A tension unit that allows each of the unfolding wires and the folding wires to be unwound and wound around the pulleys while maintaining tension, The pulley further includes a grip portion provided at a lower end of the middle rod, the pulley is provided inside the grip portion, and the tension portion is disposed between the pulley and the lower end of the middle rod. Wire umbrella.

2. 2. The wire-type umbrella according to claim 1, wherein the tension portion is constituted by an elastic member provided between one end of either or both of the unfolding wire and the folding wire and a fixed point of the runner.

3. 2. The wire-type umbrella according to claim 1, wherein the tension portion is constituted by an elastic member provided on one side of the unfolding wire or the folding wire, or both, that is not wound around the pulley.

4. The wire-type umbrella of claim 1, further comprising a guide pin provided within the handle portion for guiding either or both of the unfolding wire and the folding wire extending from the pulley to the lower end of the center rod, and the tension portion is formed by an elastic member provided between the guide pin and either or both of the unfolding wire and the folding wire.

5. The wire-type umbrella according to claim 1, wherein the pulley is either composed of two pulleys, one for each of the unfolding wire and the folding wire, or composed of a double pulley in which the unfolding wire and the folding wire are wound in opposite directions so that the unwinding and winding of the unfolding wire and the folding wire are reversed depending on the direction of rotation.

6. The wire-type umbrella according to claim 5, further comprising a handle portion provided at the lower end of the center rod, the handle portion further comprising the pulley, a drive portion for rotating the pulley, and an operating portion for operating the drive portion.

7. The wire-type umbrella according to claim 6, wherein the umbrella can be opened or folded by manually pushing up or pulling down the wheel when power is not input to the drive unit.

8. 6. The wire-type umbrella according to claim 1 or 5, further comprising an unfolded fixing part for fixing the unfolded state of the umbrella.

9. The runner includes an internal runner and an external runner that is provided outside the internal runner and is capable of moving vertically relative to the internal runner by a set distance; One end of the unfolding wire and one end of the folding wire are fixed to one side of the outer runner, The wire-type umbrella of claim 8, wherein the deployment fixing portion includes an insertion hole provided on one side of the center pole corresponding to the position of the external runner when the umbrella is in the unfolded state, and an elastic protrusion provided on the external runner facing the center pole, which is pressed by the external runner rising by the deployment wire and pulled into the insertion hole when the umbrella is unfolded, thereby fixing the unfolded state of the umbrella, and which is released by the external runner descending by the folding wire and pulled out of the insertion hole when the umbrella is folded, thereby folding the umbrella.

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