folding umbrella

Abstract

Folding umbrella, characterized in that it comprises an umbrella surface, the umbrella surface comprising: an end cap and a plurality of evenly spaced curved surfaces which are radiating and evenly distributed around the end cap in a predetermined radiation direction, with a seam connection between any adjacent evenly spaced curved surfaces, wherein each of the evenly divided curved surfaces comprises a first evenly divided surface and a second evenly divided surface equally divided along a center line, and a first structural fold line, a second structural fold line, and a third structural fold line located between and sequentially connecting the first evenly divided surface and the second evenly divided surface, wherein the first evenly divided surface comprises a first area surface, a fourth structural fold line, a second area surface, a fifth structural fold line and a third area surface which are connected to one another in the predetermined radiation direction, wherein the second evenly divided surface comprises a fourth area surface, a sixth structural fold line, a fifth area surface, a seventh structural fold line and a sixth area surface connected to each other in the predetermined radiation direction, and wherein the first region surface and the fourth region surface are connected by the first structural fold line, the second region surface and the fifth region surface are connected by the second structural fold line, and the third region surface and the sixth region surface are connected by the third structural fold line.

Description

TECHNICAL FIELD

[0001] The present utility model relates to the technical field of folding umbrellas, in particular a folding umbrella. STATE OF THE ART

[0002] Folding umbrellas, widely used in everyday life as rain and sun protection, are very popular with users due to their compact size and easy transportability. In practice, existing folding umbrellas exhibit significant deficiencies when it comes to storage after use.

[0003] Because an umbrella canopy is made of a soft, easily deformable material, it tends to fold into messy, irregularly shaped creases when folded after use. This prevents the canopy from fitting naturally to the umbrella frame, making it difficult to secure with a tie. Even if the umbrella is forcibly tied, the canopy is often swollen and loose, making it difficult to fit the umbrella into an umbrella cover.

[0004] To ensure orderly storage, users often have to manually arrange the umbrella surface layer by layer along designated fold lines, then roll it up and tie it securely in a regular state. This process is not only cumbersome, time-consuming, and strenuous, but also results in hands and clothing becoming easily soiled when the umbrella canopy is wet, significantly impairing usability and comfort.

[0005] For this reason, current folding umbrellas often have storage problems: The umbrella canopy is difficult to organize, which is time-consuming and laborious. This severely compromises usability. Therefore, there is an urgent need for improvements in the control and storage structure of the umbrella canopy. CONTENT OF THE PRESENT UTILITY MODEL

[0006] One object of the utility model is to provide a folding umbrella that solves the problems of existing folding umbrellas, in which the umbrella fabric is easily creased during storage, is difficult to organize, and storage is inefficient.

[0007] In order to solve the above-mentioned problem, the present utility model provides the following technical solution.

[0008] In a first aspect of the present utility model, a folding umbrella is provided which comprises an umbrella surface comprising: an end cap and a plurality of equally divided curved surfaces which are radiatingly and evenly distributed around the end cap in a predetermined radiating direction, wherein a seam connection exists between any adjacent equally divided curved surfaces, wherein each of the equally divided curved surfaces comprises a first equally divided surface and a second equally divided surface which are equally divided along a center line, and a first structural fold line, a second structural fold line and a third structural fold line which are located between and sequentially connect the first equally divided surface and the second equally divided surface, wherein the first equally divided surface comprises a first region surface, a fourth structural fold line,a second area, a fifth structural fold line, and a third area connected to one another in the predetermined radiation direction, wherein the second equally divided area comprises a fourth area, a sixth structural fold line, a fifth area, a seventh structural fold line, and a sixth area connected to one another in the predetermined radiation direction, and wherein the first area and the fourth area are connected by the first structural fold line, the second area and the fifth area are connected by the second structural fold line, and the third area and the sixth area are connected by the third structural fold line.

[0009] In some embodiments, the screen surface is provided with an expanded state and a contracted state, wherein in the expanded state of the screen surface, each of the evenly divided curved surfaces is expanded in a predetermined expansion direction relative to the end cap, so that the screen surface has a top side and a bottom side.

[0010] In some embodiments, the following applies when the screen surface is in the contracted state: the underside assigned to the first area is placed flat against the underside assigned to the fourth area via the first structural fold line; the top side assigned to the second area is placed flat against the top side assigned to the fifth area via the second structural fold line; the underside assigned to the third area is placed flat against the underside assigned to the sixth area via the third structural fold line; the top side assigned to the first area is placed flat against the top side assigned to the second area via the fourth structural fold line; the underside assigned to the second area is placed flat against the underside assigned to the third area via the fifth structural fold line;the upper side assigned to the fourth area is flatly aligned with the upper side assigned to the fifth area via the sixth structural fold line; and the lower side assigned to the fifth area is flatly aligned with the lower side assigned to the sixth area via the seventh structural fold line.

[0011] In some embodiments, it is provided that in the spread state of the umbrella surface, the following applies: the first structural fold line, the third structural fold line, the fifth structural fold line, and the seventh structural fold line are each curved relative to the upper side and recessed relative to the lower side; and the second structural fold line, the fourth structural fold line, and the sixth structural fold line, on the other hand, are each recessed relative to the upper side and curved relative to the lower side.

[0012] In some embodiments, the screen surface is made of a thermoplastic, high-polymer material with shape memory, wherein the first structural fold line, the second structural fold line, the third structural fold line, the fourth structural fold line, the fifth structural fold line, the sixth structural fold line, and the seventh structural fold line are each formed by heat treatment.

[0013] In a second aspect of the present utility model, there is provided a folding umbrella comprising: an umbrella surface according to the first aspect of the present utility model and an extendable support assembly connected to the underside of the umbrella surface, the extendable support assembly having a supporting state and a retracted state: in the supporting state of the extendable support assembly, the umbrella surface is in the expanded state; and in the retracted state of the extendable support assembly, the umbrella surface is in the contracted state.

[0014] In some embodiments, the extendable support assembly includes a support rod, a bell, and a plurality of umbrella rib connection assemblies. The support rod is arranged on the underside and extends in a predetermined direction, with one end of the support rod being connected to the end cap of the umbrella surface in its extension direction. The bell is mounted on the support rod and can slide back and forth along the support rod between a first end position and a second end position. The plurality of umbrella rib connection assemblies are distributed radially around the outer surface of the bell and are each assigned to a seam of the umbrella surface.Each of the rib connecting assemblies is connected to the associated seam such that the plurality of rib connecting assemblies can cause the rib surface to switch between the expanded and contracted states: when the bell is in the first end position, the rib connecting assemblies expand the rib surface; and when the bell is in the second end position, the rib connecting assemblies contract the rib surface.

[0015] In some embodiments, it is provided that each of the umbrella rib connection arrangements comprises a first umbrella rib connection, a second umbrella rib connection and a third umbrella rib connection, which are articulated to one another one after the other in the predetermined spreading direction of the umbrella surface, wherein in each umbrella rib connection arrangement an end of the first umbrella rib connection facing away from the second umbrella rib connection is articulated to the lateral surface of the bell, and wherein an end of the third umbrella rib connection facing away from the second umbrella rib connection is connected to the edge of the umbrella surface.

[0016] In some embodiments, it is provided that in each umbrella rib connection arrangement, the articulation point between the first umbrella rib connection and the second umbrella rib connection is connected to the corresponding seam, wherein the articulation point between the second umbrella rib connection and the third umbrella rib connection is connected to the corresponding seam.

[0017] In some embodiments, the extendable support assembly further comprises: a telescopic pole extending in the same direction as the support rod and slidably mounted on the support rod such that an end of the telescopic pole facing away from the end cap is telescopically extendable back and forth in its direction of extension relative to the end cap.

[0018] In summary, this utility model discloses a folding umbrella whose umbrella surface consists of a thermoplastic, high-polymer material with shape memory and is produced by heat treatment. After the heat treatment, a first structural fold line, a third structural fold line, a fifth structural fold line, and a seventh structural fold line can be formed on the umbrella surface. These are curved relative to the upper side of the umbrella surface and recessed relative to the underside of the umbrella surface. Likewise, a second structural fold line, a fourth structural fold line, and a sixth structural fold line can be formed. These are recessed relative to the upper side of the umbrella surface and curved relative to the underside of the umbrella surface. In the contracted state of the umbrella surface, the following applies: the underside associated with the first area surface is flatly connected to the first structural fold line via thethe underside assigned to the fourth area; the upper side assigned to the second area is applied flatly to the upper side assigned to the fifth area via the second structural fold line; the underside assigned to the third area is applied flatly to the underside assigned to the sixth area via the third structural fold line; the upper side assigned to the first area is applied flatly to the upper side assigned to the second area via the fourth structural fold line; the underside assigned to the second area is applied flatly to the underside assigned to the third area via the fifth structural fold line; the upper side assigned to the fourth area is applied flatly to the upper side assigned to the fifth area via the sixth structural fold line; and the underside assigned to the fifth area is applied flatly to the seventhstructural fold line is applied flatly to the underside assigned to the sixth area. The combination of the various structural fold lines on the umbrella surface with the memory properties of the umbrella surface material enables a regular and orderly folding process. This ensures that the user can automatically return the umbrella surface to its original folded state after each use along the predetermined curved or recessed structural fold lines. This achieves quick and orderly folding without repeated manual smoothing. Compared to conventional umbrella coverings, which easily become messy and are difficult to store, the present utility model significantly improves the folding efficiency and orderliness of the umbrella surface during storage, reduces the operating effort, and provides the user with a faster, tidier, andmore convenient storage process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings attached to the description, which form a part of this application, serve to facilitate understanding of the invention. The schematic embodiments of the present utility model and the description thereof serve only to illustrate the present utility model and do not constitute an unreasonable limitation of the present utility model. In the figures: Fig. 1 shows a schematic view of the structure of a screen surface according to a first embodiment of the present utility model at a first angle; Fig. 2 shows a schematic view of the structure of the screen surface with respect to the distribution of structural fold lines according to the first embodiment of the present utility model at the first angle; Fig. 3 shows a schematic view of the structure of the screen surface according to the first embodiment of the present utility model at a second angle; Fig. 4 shows a schematic view of the structure of the screen surface with respect to the distribution of structural fold lines according to the first embodiment of the present utility model at the second angle; Fig. 5 is a schematic view showing the structure of a folding umbrella according to a second embodiment of the present invention; Fig. Figure 6 shows an enlarged schematic structural section of part A of Fig. 5; Fig. Figure 7 shows an enlarged schematic structural section of part B of Fig. 5; and Fig. Figure 8 shows an enlarged schematic structural section of part C of Fig. 5. List of reference symbols:

[0020] 1. Screen surface; 110. Evenly divided curved surface; 110a. Top side; 110b. Bottom side; 111. first evenly divided area; 111a. first area area; 111b. second area area; 111c. third area area; 112. second equally divided area; 112a. fourth area area; 112b. fifth area area; 112c. sixth area area; 113. first structural fold line; 114. second structural fold line; 115. third structural fold line; 116. fourth structural fold line; 117. sixth structural fold line; 118. fifth structural fold line; 119. seventh structural fold line; 120. End cap; 130. Seam; 2. Support rod; 3. Bell; 4. First umbrella rib connection; 5. Second umbrella rib connection; 6. Third umbrella rib connection; 7. Telescopic pole. DETAILED DESCRIPTION

[0021] The present utility model will now be described in more detail with reference to the drawings in conjunction with the exemplary embodiments. The individual examples serve to illustrate the present utility model and do not represent a limitation thereof. Indeed, it will be obvious to those skilled in the art that modifications and variations can be made to this utility model without departing from the scope or spirit of the present utility model. For example, features shown or described as part of one exemplary embodiment can be used in another exemplary embodiment to create a further exemplary embodiment. It is therefore expected that the present utility model encompasses such modifications and variations that are included within the scope of the appended claims and their equivalents.

[0022] In the description of the present utility model, the terms "longitudinal," "transverse," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," etc., are used in each case with reference to the orientation or positional relationship shown in the respective figure, solely to facilitate the clarification of the present application. This means that these terms do not represent a claim to the design and operation of the present utility model in a specific positioning, so that they do not constitute a limitation of the present utility model. The terms "connected," "attached," and "arranged" as used in this utility model are to be understood in the broadest sense.For example, it can be a fixed connection or a detachable connection, a direct connection or an indirect connection via an intermediate component, a wired electrical connection, a wireless electrical connection, or a wireless radio connection. For those of ordinary skill in the art, the specific meaning of the above terms can be understood depending on specific situations.

[0023] The accompanying drawings illustrate one or more examples of the present utility model. Numerical and alphabetic designations are used in the detailed description to refer to features in the drawings. The designations used in the drawings and in the description have been previously used to refer to similar or comparable parts of the present utility model. The terms "first," "second," "third," etc., as used herein, are used interchangeably to distinguish one component from another and are not intended to indicate the position or significance of any individual component.

[0024] As in the Fig. 1 to 4, a first embodiment of the present utility model provides a folding umbrella comprising an umbrella surface 1 made of a thermoplastic, high-polymer material with shape memory and formed by heat treatment.

[0025] In particular, the Fig. 1 to 4 that the umbrella surface 1 is composed of an end cap 120 and a plurality of evenly spaced curved surfaces 110, which are radially and evenly distributed around the end cap 120 in a predetermined radiation direction, with any two adjacent evenly spaced curved surfaces 110 being connected to one another by a seam 130. In an expanded state, the umbrella surface 1 has a dome-shaped form with a top surface 110a and a bottom surface 110b. During use, the user is located below the bottom surface 110b and is protected from sun, rain, and snow by the top surface 110a. At the centerline of each unfolded evenly spaced curved surface 110, a first structural fold line 113, a second structural fold line 114, and a third structural fold line 115 are formed by a heat treatment process along the edge from the end cap 120 to the umbrella surface 1.which are sequentially connected to each other. By the first structural fold line 113, the second structural fold line 114, and the third structural fold line 115, which are sequentially connected to each other, the evenly divided curved surface 110 is divided into two equal parts, namely a first evenly divided surface 111 and a second evenly divided surface 112. In the direction of the edge from the end cap 120 to the screen surface 1, the first evenly divided surface 111 is sequentially divided into a first region surface 111a, a second region surface 111b, and a third region surface 111c. A fourth structural fold line 116 is formed between the first region surface 111a and the second region surface 111b by a heat treatment process, and a fifth structural fold line 118 is formed between the second region surface 111b and the third region surface 111c by a heat treatment process. Towards the edge of theTo connect the end cap 120 to the screen surface 1, the second evenly divided surface 112 is successively divided into a fourth area surface 112a, a fifth area surface 112b, and a sixth area surface 112c. A sixth structural fold line 117 is formed between the fourth area surface 112a and the fifth area surface 112b by a heat treatment process, and a seventh structural fold line 119 is formed between the fifth area surface 112b and the sixth area surface 112c by a heat treatment process. In the contracted state of the screen surface 1, the following applies: the underside 110b associated with the first area surface 111a is flatly applied to the underside 110b associated with the fourth area surface 112a via the first structural fold line 113; the upper side 110a assigned to the second area 111b is connected flatly to the upper side 110a assigned to the fifth area 112b via the second structural fold line 114laid out; the underside 110b assigned to the third area 111c is laid out flatly via the third structural fold line 115 to the underside 110b assigned to the sixth area 112c; the top side 110a assigned to the first area 111a is laid out flatly via the fourth structural fold line 116 to the top side 110a assigned to the second area 111b; the underside 110b assigned to the second area 111b is laid out flatly via the fifth structural fold line 118 to the underside 110b assigned to the third area 111c; the top side 110a assigned to the fourth area 112a is laid out flatly via the sixth structural fold line 117 to the top side 110a assigned to the fifth area 112b; and the underside 110b assigned to the fifth area 112b is connected flatly to the underside 110b assigned to the sixth area 112c via the seventh structural fold line 119created.

[0026] In some embodiments, it is provided that in the spread state of the screen surface 1, the following applies: the first structural fold line 113, the third structural fold line 115, the fifth structural fold line 118, and the seventh structural fold line 119 formed by the heat treatment process are each curved relative to the upper side 110a and recessed relative to the lower side 110b; and the second structural fold line 114, the fourth structural fold line 116, and the sixth structural fold line 117 formed by the heat treatment process are each recessed relative to the upper side 110a and curved relative to the lower side 110b.The curved or recessed structural fold lines formed by the above-mentioned heat treatment process can provide structural guidance for the umbrella surface 1 during the contraction of the umbrella surface 1, so that the umbrella surface 1 bends naturally under the guidance of the structural fold lines or the curved or recessed structures. Thus, a regular and orderly folding process is possible. By combining the above-mentioned structural fold lines with the memory properties of the material of the umbrella surface 1, it can be ensured that the umbrella surface 1 quickly reaches a predetermined contracted state during contraction. The user does not need to additionally flatten the umbrella surface 1 manually or readjust the folding position, thus avoiding the inconvenience caused by manually flattening the umbrella surface 1 when the umbrella surface 1 is wet.After the umbrella surface 1 is shrunk, the umbrella surface 1 has clear contours and a smooth surface. The shrunk umbrella surface 1 is compact overall, allowing the user to more easily secure the shrunk umbrella surface 1 with a strap or the like, allowing the shrunk umbrella surface 1 to be smoothly inserted into an umbrella cover. This effectively prevents the shrunk umbrella surface 1 from being bloated, loose, and messy, providing the user with a faster, neater, and more convenient storage process.

[0027] In some embodiments, the number of evenly spaced curved surfaces 110 may be six or eight, and the seam 130 between any two adjacent evenly spaced curved surfaces 110 may be a seam line formed by sewing blanks together, a lamination line formed by ultrasonically pressing blanks together, or a hot-melt line formed by hot-melting blanks. The seam 130 formed in the above processes can improve the watertightness of the seam 130.

[0028] As in the Fig.5 to 8, in some embodiments, a support rod 2 is arranged on the underside 110b of the umbrella surface 1 and extends away from the underside 110b. A bell 3 is placed on the support rod 2. Arranged around the outer surface of the bell 3 are several umbrella rib connection assemblies, the number of which corresponds one-to-one to the number of seams 130 of the umbrella surface 1. Each of the umbrella rib connection assemblies comprises a first umbrella rib connection 4, a second umbrella rib connection 5, and a third umbrella rib connection 6, which are articulated to one another one after the other. An end of the first umbrella rib connection 4 facing away from the second umbrella rib connection 5 is articulated to the outer surface of the bell 3, wherein an end of the third umbrella rib connection 6 facing away from the second umbrella rib connection 5 is articulated to the edge of the umbrella surface 1.In each umbrella rib connection arrangement, the articulation point between the first umbrella rib connection 4 and the second umbrella rib connection 5 is sewn in a sewing process with the seam 130 assigned to this umbrella rib connection arrangement, wherein the articulation point between the second umbrella rib connection 5 and the third umbrella rib connection 6 is sewn in a sewing process with the seam 130 assigned to this umbrella rib connection arrangement. A telescopic pole 7 is mounted on an end of the support rod 2 facing away from the end cap 120, wherein an end of the telescopic pole 7 facing away from the end cap 120 is telescopically extendable back and forth along the support rod 2.When using the folding umbrella, the user can control the plurality of umbrella rib connecting assemblies to switch between a supporting state and a retracted state by sliding the bell 3 back and forth between a first end position and a second end position. As a result, the umbrella surface 1 is switched between the expanded and contracted states by the plurality of umbrella rib connecting assemblies. When the bell 3 is in the first end position, each umbrella rib connecting assembly is in a fully supporting state, with the umbrella surface 1 in a fully expanded state. On the other hand, when the bell 3 is in the second end position, each umbrella rib connecting assembly is in a fully retracted state, with the umbrella surface 1 in a fully contracted state.

[0029] In some embodiments, the telescopic pole 7 can consist of several hollow tubes with different diameters, which are sequentially inserted into one another, allowing the user to adjust the length of the telescopic pole 7 as needed. In this way, the height of the umbrella surface 1 can be adjusted to the user's height when using the folding umbrella.

[0030] From the above description it can be seen that the following advantageous technical effects are achieved with the above-explained embodiments of the present utility model.

[0031] In comparison to the prior art, the screen surface 1 in this embodiment of the present utility model consists of a thermoplastic, high-polymer material with shape memory and is produced by heat treatment. After the heat treatment, a first structural fold line 113, a third structural fold line 115, a fifth structural fold line 118, and a seventh structural fold line 119 can be formed on the screen surface 1. These are curved relative to the upper side 110a of the screen surface 1 and recessed relative to the lower side 110b of the screen surface 1. Likewise, a second structural fold line 114, a fourth structural fold line 116, and a sixth structural fold line 117 can be formed. These are recessed relative to the upper side 110a of the screen surface 1 and curved relative to the lower side 110b of the screen surface 1. In the contracted state of the screen surface 1, the following applies: the firstThe underside 110b assigned to the area 111a is applied flatly to the underside 110b assigned to the fourth area 112a via the first structural fold line 113; the top side 110a assigned to the second area 111b is applied flatly to the top side 110a assigned to the fifth area 112b via the second structural fold line 114; the underside 110b assigned to the third area 111c is applied flatly to the underside 110b assigned to the sixth area 112c via the third structural fold line 115; the top side 110a assigned to the first area 111a is applied flatly to the top side 110a assigned to the second area 111b via the fourth structural fold line 116; the underside 110b assigned to the second area 111b is applied flatly to the underside 110b assigned to the third area 111c via the fifth structural fold line 118; that of the fourth areaThe upper side 110a associated with the fifth area 112a is placed flat against the upper side 110a associated with the fifth area 112b via the sixth structural fold line 117; and the lower side 110b associated with the fifth area 112b is placed flat against the lower side 110b associated with the sixth area 112c via the seventh structural fold line 119. By combining the various structural fold lines on the umbrella surface 1 with the memory properties of the material of the umbrella surface 1, it can be ensured that the umbrella surface 1 is bent naturally after each use by the user, following the structural fold lines or the curved or recessed structures. This enables a regular and orderly folding process. The umbrella surface 1 is automatically guided so that it returns to its originally folded state along the predetermined curved or recessed structural fold lines.The user does not need to additionally manually flatten the umbrella surface 1 or readjust the folding position, thus avoiding the inconvenience of manually flattening the umbrella surface 1 when the umbrella surface 1 is wet. This achieves quick and neat folding without repeated manual flattening. Compared with conventional umbrella covers, which are easily messy and difficult to store, the present utility model significantly improves the folding efficiency and orderliness of the umbrella surface 1, reduces the operation burden, and provides the user with a faster, neater, and more convenient storage process.

[0032] The above only describes preferred embodiments of the present utility model, which are not intended to limit the present utility model. Those skilled in the art must be aware that the present utility model may be subject to numerous modifications and alterations. All modifications, equivalent substitutions, and further developments that correspond to the spirit and principle of the present utility model are to be included within the scope of protection of the present utility model.

Claims

[1] Folding umbrella, characterized by that it comprises a shielding surface, wherein the shielding surface comprises: an end cap and a plurality of evenly spaced curved surfaces which are radiating and evenly distributed around the end cap in a predetermined radiation direction, with a seam connection between any adjacent evenly spaced curved surfaces, wherein each of the evenly divided curved surfaces comprises a first evenly divided surface and a second evenly divided surface equally divided along a center line, and a first structural fold line, a second structural fold line, and a third structural fold line located between and sequentially connecting the first evenly divided surface and the second evenly divided surface, wherein the first evenly divided surface comprises a first area surface, a fourth structural fold line, a second area surface, a fifth structural fold line and a third area surface which are connected to one another in the predetermined radiation direction, wherein the second evenly divided surface comprises a fourth area surface, a sixth structural fold line, a fifth area surface, a seventh structural fold line and a sixth area surface connected to each other in the predetermined radiation direction, and wherein the first region surface and the fourth region surface are connected by the first structural fold line, the second region surface and the fifth region surface are connected by the second structural fold line, and the third region surface and the sixth region surface are connected by the third structural fold line. [2] Folding umbrella according to claim 1, characterized by , that the screen surface has a spread state and a contracted state, wherein in the spread state of the screen surface, each of the evenly divided curved surfaces is spread in a predetermined spreading direction relative to the end cap, so that the screen surface has an upper surface and a lower surface. [3] Folding umbrella according to claim 2, characterized by that in the contracted state of the screen surface the following applies: the underside assigned to the first area is flatly attached to the underside assigned to the fourth area via the first structural fold line; the upper side assigned to the second area is applied flatly to the upper side assigned to the fifth area via the second structural fold line; the underside assigned to the third area is flatly attached to the underside assigned to the sixth area via the third structural fold line; the upper side assigned to the first area is flatly applied to the upper side assigned to the second area via the fourth structural fold line; the underside assigned to the second area is flatly attached to the underside assigned to the third area via the fifth structural fold line; the upper side assigned to the fourth area is flatly applied to the upper side assigned to the fifth area via the sixth structural fold line; and the underside assigned to the fifth area is flatly attached to the underside assigned to the sixth area via the seventh structural fold line. [4] Folding umbrella according to claim 2 or 3, characterized bythat in the spread state of the screen surface the following applies: the first structural fold line, the third structural fold line, the fifth structural fold line and the seventh structural fold line are each curved relative to the upper side and depressed relative to the lower side; and the second structural fold line, the fourth structural fold line and the sixth structural fold line, however, are each recessed relative to the top side and curved relative to the bottom side. [5] Folding umbrella according to claim 4, characterized bythat the screen surface consists of a thermoplastic, high-polymer material with shape memory, wherein the first structural fold line, the second structural fold line, the third structural fold line, the fourth structural fold line, the fifth structural fold line, the sixth structural fold line and the seventh structural fold line are each formed by heat treatment. [6] Folding umbrella according to one of claims 1 to 5, characterized by that it also includes: an extendable support assembly connected to the underside of the screen surface, wherein the extendable support assembly has a supporting state and a retracted state: in the supporting state of the extendable support arrangement, the screen surface is in the spread state; and When the extendable support assembly is retracted, the screen surface is in the contracted state. [7] Folding umbrella according to claim 6, characterized by that the extendable support assembly comprises: a support rod arranged at the bottom and extending in a predetermined direction, one end of the support rod being connected in its extending direction to the end cap of the screen surface; a bell mounted on the support rod and capable of sliding back and forth along the support rod between a first end position and a second end position; and several shield rib connection arrangements, which are evenly distributed in a radial manner around the outer surface of the bell and are each assigned to a seam of the shield surface, wherein each of the rib connecting assemblies is connected to the associated seam such that the plurality of rib connecting assemblies can cause the rib surface to switch between the expanded and contracted states: when the bell is in the first end position, the screen surface is spread by the plurality of screen rib connecting assemblies; and When the bell is in the second end position, the umbrella surface is contracted by the plurality of umbrella rib connecting assemblies. [8] Folding umbrella according to claim 7, characterized by , that each of the umbrella rib connection arrangements comprises a first umbrella rib connection, a second umbrella rib connection and a third umbrella rib connection which are articulated to one another in the predetermined spreading direction of the umbrella surface, wherein in each shield rib connection arrangement, an end of the first shield rib connection facing away from the second shield rib connection is hinged to the lateral surface of the bell, and wherein an end of the third shield rib connection facing away from the second shield rib connection is connected to the edge of the shield surface. [9] Folding umbrella according to claim 8, characterized by that in each umbrella rib connection arrangement, the articulation point between the first umbrella rib connection and the second umbrella rib connection is connected to the corresponding seam, wherein the articulation point between the second umbrella rib connection and the third umbrella rib connection is connected to the corresponding seam. [10] Folding umbrella according to one of claims 7 to 9, characterized by that the extendable support assembly further comprises: a telescopic pole extending in the same direction as the support rod and slidably mounted on the support rod such that an end of the telescopic pole remote from the end cap can be telescoped back and forth in its direction of extension relative to the end cap.

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