Metal-free opening and closing structure of self-opening umbrella

Abstract

The utility model discloses a metal-free opening and closing structure of a self-opening umbrella, which structurally comprises a middle rod, a middle nest, a lower nest and an umbrella rib component, and the umbrella rib component is respectively connected with the middle rod, the middle nest and the lower nest in a pivoting manner; a force storage assembly is arranged on the middle rod and comprises a sleeve and a non-metal elastic piece, the non-metal elastic piece is arranged outside the sleeve in a surrounding mode and arranged above the middle nest, the sleeve is formed by the fact that the lower nest extends upwards and is installed on the middle rod in a sliding mode, the middle nest is installed on the sleeve in a sliding mode, and the two ends of the non-metal elastic piece are fixed to the middle nest and the end, away from the lower nest, of the sleeve respectively. The non-metal elastic piece with the two fixed ends is arranged above the middle nest to serve as a force storage component, when the umbrella is folded, the non-metal elastic piece is stretched to achieve force storage, when the umbrella is unfolded, the non-metal elastic piece drives the middle nest and the sleeve to move upwards along the middle rod at the same time, automatic opening is completed, the opening and closing structure is simple in design, metal pieces are not needed, and the cost is low. Better environmental protection performance, recoverability and maintainability are realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of umbrella opening and closing, and particularly relates to a metal-free opening and closing structure of a self-opening umbrella. Background Art

[0002] Umbrellas are a kind of daily necessities that people often use. With the increasing awareness of environmental protection, the non-metallization of the overall structure of umbrellas has become a new research hotspot in umbrella manufacturing. Most of the existing self-opening umbrellas have metal springs as force storage devices between the middle nest and the lower nest of the umbrella, which have good stability. However, in actual use, metal springs will inevitably come into contact with rainwater. On the one hand, the metal springs themselves are prone to rust, resulting in elastic failure and unusability; on the other hand, the rust on the metal springs is easy to adhere to the ribs and umbrella cloth, which not only affects the appearance, but also is not conducive to the recycling of various components. In addition, the use of metal springs is not conducive to the non-metallization of umbrellas.

[0003] In the prior art, some umbrellas try to use plastic springs instead of metal springs, but due to the poor resilience of plastic deformation, obvious stress relaxation, and narrow room temperature range of plastics, they cannot be applied. Utility Model Content

[0004] The utility model aims to provide a metal-free opening and closing structure of a self-opening umbrella, so as to solve the problems that the existing self-opening umbrella needs to use a metal spring as a power storage device, has poor environmental performance and poor recyclability, etc.

[0005] The utility model is realized by the following technical solutions:

[0006] The utility model proposes a metal-free opening and closing structure of a self-opening umbrella, the structure of which includes a middle rod, a middle nest, a lower nest and an umbrella rib assembly, wherein the umbrella rib assembly is pivotally connected to the middle rod, the middle nest and the lower nest; a force storage assembly is provided on the middle rod, and the force storage assembly includes a sleeve and a non-metallic elastic member, the non-metallic elastic member is arranged around the sleeve, the sleeve is formed by the lower nest extending upward, the sleeve is slidably mounted on the middle rod, the middle nest is slidably mounted on the sleeve, the non-metallic elastic member is arranged above the middle nest, one end of the non-metallic elastic member is fixed to the middle nest, and the other end is fixed to the end of the sleeve away from the lower nest; when the umbrella is folded, the lower nest drives the middle nest downward, and the non-metallic elastic member is stretched to complete the force storage;

[0007] Based on the above technical scheme, a non-metallic elastic member with fixed ends is arranged above the middle nest as a force storage component. When the umbrella is folded, the lower nest drives the middle nest to move down along the sleeve to a fixed position. Since the upper end of the non-metallic elastic member is fixed on the sleeve, the non-metallic elastic member is stretched during the downward movement of the middle nest to generate an elastic restoring force of tensile deformation. When the umbrella needs to be opened, the lower nest is separated from the fixed position. Under the action of the elastic restoring force, the lower end of the non-metallic elastic member pulls the middle nest upward along the sleeve, and the upper end pushes the sleeve upward along the middle rod, thereby realizing automatic opening of the umbrella. The structural design is simple, which effectively solves the disadvantage of the existing self-opening umbrella using a metal spring as a force storage device, and has better environmental protection performance and recyclability.

[0008] Preferably, the non-metallic elastic member is a cylindrical rubber sleeve. The rubber material has good ductility and resilience, good durability, and the use of a cylindrical rubber sleeve has better assembly convenience;

[0009] More preferably, the cylinder wall of the rubber sleeve is wavy to enhance the elastic recovery force and tensile strength of the rubber sleeve, which is more conducive to the accumulation of force during the folding process.

[0010] Preferably, the non-metallic elastic member comprises a plurality of rubber strips, each of which is independently arranged. After being fixed, the rubber strips are in a cylindrical structure distributed around the circumference of the sleeve. This design is conducive to balanced stress during the stretching and rebounding process of the non-metallic elastic member, avoiding local damage due to excessive stress. At the same time, when the non-metallic elastic member is partially damaged, this design is conducive to local replacement, and the maintainability is better;

[0011] Preferably, the non-metallic elastic member comprises a plurality of rubber strips, wherein two rubber strips form a group and form a rubber ring, and the rubber ring is fixed to present a cylindrical structure distributed around the circumference of the sleeve. This design is beneficial to the balanced force of the non-metallic elastic member and has better assembly convenience and fixed connection stability;

[0012] More preferably, the rubber strip is a solid rubber strip. On the one hand, the service life can be extended by adjusting the thickness of the rubber strip. On the other hand, the manufacturing process of the solid rubber strip is simpler, which is conducive to cost reduction.

[0013] More preferably, the rubber strip is in the shape of a hollow cylinder, and has a wavy cylinder wall to enhance the tensile strength of the rubber strip, further extend its service life, and increase power storage.

[0014] Furthermore, the non-metallic elastic member is integrally formed with the middle nest and the sleeve. This design makes full use of the self-adhesive force of the rubber molding process to enhance the connection stability between the non-metallic elastic member and the middle nest and the sleeve.

[0015] Furthermore, the non-metallic elastic part is connected to the sleeve and the middle nest through a buckling structure, and the buckling structure includes an annular groove and a buckling part engaged with the annular groove. The annular groove is fixed on the sleeve and the middle nest, and the rubber sleeve is arranged between the annular groove and the buckling part. The rubber sleeve is fixed by the engagement of the annular groove and the buckling part. This design realizes mechanical fixation of the non-metallic elastic part during the assembly process, and has better maintenance convenience when the non-metallic elastic part is damaged.

[0016] Furthermore, hooks are provided on the end of the sleeve away from the lower nest and on the middle nest, and the rubber ring is hung on the hooks to achieve fixation, so as to improve the assembly convenience of the rubber ring and the stability of the fixed connection.

[0017] Beneficial Effects

[0018] One of the above technical solutions has the following advantages or beneficial effects:

[0019] 1) A non-metallic elastic member is arranged above the middle nest and the two ends of the non-metallic elastic member are respectively fixed on the sleeve and the middle nest. When the umbrella is folded, the non-metallic elastic member is stretched and deformed to generate elastic force to complete force storage. When the umbrella is opened, the lower end of the non-metallic elastic member pulls the middle nest upward along the sleeve, and the upper end pushes the sleeve upward along the middle rod to realize automatic opening of the umbrella. The opening and closing force storage structure is simple and does not require the use of metal parts, which effectively solves the disadvantage of the existing self-opening umbrella using a metal spring as a force storage device. The self-opening umbrella using this opening and closing structure has better environmental protection performance and recyclability.

[0020] 2) By using rubber material with good tensile deformation performance to make non-metallic elastic parts, the force storage components have better fatigue resistance and effectively extend the service life; at the same time, by using multiple rubber strips to make non-metallic elastic parts, the force is more evenly distributed during the power storage and parachute opening process. When damage occurs, only partial replacement can be performed, and the replacement process requires fewer parts to be disassembled, further improving the service life and maintenance convenience of the force storage components. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0022] Figure 1 This is a schematic diagram of the opening and closing structure of the first embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the folded state of the first embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of the open state of the first embodiment of the utility model;

[0025] Figure 4 This is a schematic diagram of the buckling structure of the second embodiment of the utility model;

[0026] Figure 5 This is a partial structural diagram of the third embodiment of the present utility model;

[0027] Figure 6 This is a partial structural diagram of the fourth embodiment of the present utility model;

[0028] Figure 7 This is a schematic diagram of the hook structure of the fourth embodiment of the utility model;

[0029] In the figure: middle rod 1; rib assembly 2; main rib 21; auxiliary rib 22; supporting rib 23; middle nest 3; lower nest 4; power storage assembly 5; sleeve 51; non-metallic elastic member 52; rubber sleeve 521; rubber strip 522; rubber ring 5221; fixing ring 53; buckling structure 6; ring groove 61; buckling member 62; hook 7; protrusion 71; avoidance groove 711; protective cover 712; hook-shaped member 72. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the embodiments, but the implementation manner of the present invention is not limited thereto.

[0031] Embodiment 1

[0032] like Figure 1 to Figure 3 As shown, this embodiment provides a metal-free opening and closing structure of a self-opening umbrella, which structure includes a middle rod 1, a middle nest 3, a lower nest 4 and an umbrella rib assembly 2. The middle rod 1 can be telescopic or one-piece. This embodiment takes a one-piece middle rod 1 (i.e., a straight-handled umbrella) as an example for explanation. The umbrella rib assembly 2 is pivotally connected to the middle rod 1, the middle nest 3 and the lower nest 4. Specifically, the umbrella rib assembly 2 includes a main umbrella rib 21, a secondary umbrella rib 22 and a supporting umbrella rib 23. The main umbrella rib 21 is pivotally connected to the top of the middle rod 1, and the two ends of the secondary umbrella rib 22 are respectively connected to the main umbrella rib 21 and the middle rod 1. The nest 3 is pivotally connected, and the two ends of the supporting rib 23 are pivotally connected to the auxiliary rib 22 and the lower nest 4 respectively; the middle rod 1 is provided with a power storage component 5, and the power storage component 5 includes a sleeve 51 and a non-metallic elastic member 52, the sleeve 51 is extended upward by the lower nest 4, the sleeve 51 is slidably installed on the middle rod 1, and the middle nest 3 is slidably installed on the sleeve 51, and the non-metallic elastic member 52 is arranged above the middle nest 3, one end of the non-metallic elastic member 52 is fixed to the middle nest 3, and the other end is fixed to the end of the sleeve 51 away from the lower nest 4.

[0033] Preferably, the non-metallic elastic member 52 is made of a rubber material with good ductility and resilience, and the non-metallic elastic member 52 is a cylindrical rubber sleeve 521, and the rubber sleeve 521 is sleeved outside the sleeve 51, and the cylindrical wall of the rubber sleeve 521 is designed to be wavy to enhance the elastic recovery force and tensile strength of the rubber sleeve 521. The rubber sleeve 521 is integrally formed with the middle nest 3 and the sleeve 51. The specific molding process can be: the middle nest 3 and the lower nest 4 with the sleeve 51 are first injection molded separately, and the fixing ring 53 of the rubber sleeve 521 is formed on the injection-molded middle nest 3 and the top of the sleeve 51, and the middle nest 3 and the sleeve 51 are assembled and put into a mold, and rubber is injected into the mold. During the rubber solidification process, the rubber's own adhesive force is used to make the two ends of the rubber sleeve 521 solidify with the fixing ring 53 respectively, and the integral molding and fixing are completed.

[0034] The principle of the opening and closing structure is as follows: Figure 2 As shown, when the umbrella is folded, the lower nest 4 drives the middle nest 3 to move downward along the sleeve 51 to a fixed position (generally the handle of the umbrella). Since one end of the rubber sleeve 521 is fixed to the end of the sleeve 51, the rubber sleeve 521 is stretched during the downward movement of the middle nest 3 and an elastic restoring force is generated; Figure 3 As shown, when the umbrella needs to be opened, the lower nest 4 is separated from the fixed position, and the rubber sleeve 521 tends to return to the normal state under the action of the elastic restoring force. During the recovery process, the lower end of the rubber sleeve 521 pulls the middle nest 3 upward along the sleeve 51, and the upper end pushes the sleeve 51 upward along the middle rod 1, thereby completing the automatic opening of the umbrella.

[0035] Embodiment 2

[0036] This embodiment provides a metal-free opening and closing structure of a self-opening umbrella, which is different from the first embodiment in that:

[0037] The wall of the rubber sleeve 52 is a smooth curved surface, and the rubber sleeve 521 is connected to the sleeve 51 and the middle nest 3 through a buckle structure 6. Figure 4 As shown, taking the buckling structure 6 at the top of the sleeve 51 as an example, the buckling structure 6 includes an annular groove 61 and a buckling piece 62 engaged with the annular groove 61, the annular groove 61 is fixedly arranged on the sleeve 51 and the middle nest 3, and the fixing method of the annular groove 61 can be one-piece molding or secondary assembly fixing, the rubber sleeve 521 is arranged between the annular groove 61 and the buckling piece 62, and the fixing of the rubber sleeve 521 is achieved by the engagement of the annular groove 61 and the buckling piece 62.

[0038] The advantage of this embodiment is that the non-metallic elastic member 52 is mechanically fixed, and the fixing structure is completed during the assembly process. When the non-metallic elastic member 52 is damaged, it has better maintenance convenience.

[0039] Other components not described in this embodiment and the relative positions and connection relationships between the components are the same as those in the first embodiment.

[0040] Embodiment 3

[0041] like Figure 5 As shown, this embodiment provides a metal-free opening and closing structure of a self-opening umbrella, which is different from the first or second embodiment in that:

[0042] The non-metallic elastic member 52 includes a plurality of rubber strips 522, each of which is independently provided. After being fixed, the rubber strips 522 are arranged in a cylindrical structure distributed around the circumference of the sleeve 51; the rubber strips 522 are hollow cylindrical structures with wavy walls to enhance the tensile strength of the rubber strips 522, further extend the service life, and increase the power storage. The fixing method of the rubber sleeve 522 to the sleeve 51 and the middle nest 3 can adopt the buckle structure of the second embodiment, such as Figure 5 shown.

[0043] The advantage of this embodiment is that the non-metallic elastic member 52 is configured as multiple separate pieces rather than a whole piece, which is beneficial to balanced stress during the stretching and rebounding process and avoids local damage due to excessive stress. At the same time, when the non-metallic elastic member 52 is partially damaged, only part of it needs to be replaced instead of the whole part. During the replacement process, there is no need to detach the middle nest 3 and the upper nest from the middle rod 1, which improves maintainability and controllable costs.

[0044] Other components not described in this embodiment and the relative positions and connection relationships between the components are the same as those in Embodiment 1 or 2.

[0045] Embodiment 4

[0046] like Figures 6-7 As shown, this embodiment provides a metal-free opening and closing structure of a self-opening umbrella, which is different from the first to third embodiments in that:

[0047] like Figure 6 As shown, the non-metallic elastic member 52 includes a plurality of rubber strips 522, and each two of the rubber strips 522 form a group to form a rubber ring 5221. After being fixed, the rubber ring 5221 presents a cylindrical structure distributed around the circumference of the sleeve 51. The rubber strip 522 is a solid rubber strip 522. On the one hand, the service life can be extended by adjusting the thickness of the rubber strip 522. On the other hand, the manufacturing process can be simplified, which is conducive to cost reduction.

[0048] The end of the sleeve 51 away from the lower nest 4 and the middle nest 3 are both provided with hooks 7, and the rubber ring 5221 is hung on the hooks 7 to achieve fixation. Figure 6As shown, the hook portion 7 can be a protrusion 71 with a plurality of avoidance grooves 711 provided on the end of the sleeve 51 and the middle nest 3, the rubber ring 5221 is embedded in the avoidance groove 711 for fixing, the avoidance grooves 711 embedded in the same rubber ring 5221 can be adjacent avoidance grooves 711, or can be spaced avoidance grooves 711, preferably, a protective cover 712 can be provided outside the protrusion 71; preferably, as Figure 7 As shown, the hook portion 7 can also be a hook-shaped component 72 protruding from the end of the sleeve 51 and the middle nest 3, and the end of the hook-shaped component 72 is U-shaped or round-shaped to prevent the rubber ring 5221 from loosening when it is restored.

[0049] The advantage of this embodiment is that the non-metallic elastic member 52 is configured as a plurality of rubber rings 5221, which can ensure that the non-metallic elastic member 52 is subjected to balanced force and adopt a simple fixing structure, thereby further simplifying the assembly and maintenance process and improving the connection stability.

[0050] It should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0051] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the present invention.

Claims

1. A metal-free opening and closing structure of a self-opening umbrella, comprising a middle rod, a middle nest, a lower nest and an umbrella rib assembly, wherein the umbrella rib assembly is pivotally connected to the middle rod, the middle nest and the lower nest respectively; characterized in that: The middle rod is provided with a force storage component, and the force storage component includes a sleeve and a non-metallic elastic member. The non-metallic elastic member is arranged around the sleeve, and the sleeve is formed by the lower nest extending upward. The sleeve is slidably installed on the middle rod, and the middle nest is slidably installed on the sleeve. The non-metallic elastic member is arranged above the middle nest, and one end of the non-metallic elastic member is fixed to the middle nest, and the other end is fixed to the end of the sleeve away from the lower nest; when the umbrella is folded, the lower nest drives the middle nest downward, and the non-metallic elastic member is stretched to complete the force storage.

2. The metal-free opening and closing structure of a self-opening umbrella according to claim 1, characterized in that: The non-metallic elastic part is a cylindrical non-metallic elastic part.

3. The metal-free opening and closing structure of a self-opening umbrella according to claim 2, characterized in that: The cylinder wall of the non-metallic elastic member is wavy.

4. The metal-free opening and closing structure of a self-opening umbrella according to claim 1, characterized in that: The non-metallic elastic member comprises a plurality of rubber strips, each of which is independently arranged. After being fixed, the rubber strips are in a cylindrical structure distributed around the circumference of the sleeve.

5. The metal-free opening and closing structure of a self-opening umbrella according to claim 1, characterized in that: The non-metallic elastic member comprises a plurality of rubber strips, wherein two of the rubber strips form a group and form a rubber ring, and the rubber ring is fixed to present a cylindrical structure distributed around the circumference of the sleeve.

6. A metal-free opening and closing structure of a self-opening umbrella according to claim 4 or 5, characterized in that: The rubber strip is a solid rubber strip.

7. A metal-free opening and closing structure of a self-opening umbrella according to claim 4 or 5, characterized in that: The rubber strip is in a hollow cylindrical shape and has a wavy cylindrical wall.

8. The metal-free opening and closing structure of a self-opening umbrella according to claim 1, characterized in that: The non-metallic elastic member is integrally formed with the middle nest and the sleeve.

9. The metal-free opening and closing structure of a self-opening umbrella according to claim 1, characterized in that: The non-metallic elastic part is connected to the sleeve and the middle nest through a buckling structure, and the buckling structure includes an annular groove and a buckling part engaged with the annular groove. The annular groove is fixed on the sleeve and the middle nest, and the non-metallic elastic part is arranged between the annular groove and the buckling part. The non-metallic elastic part is fixed by the engagement of the annular groove and the buckling part.

10. The metal-free opening and closing structure of a self-opening umbrella according to claim 5, characterized in that: The end of the sleeve away from the lower nest and the middle nest are both provided with hooks, and the rubber ring is hung on the hooks to achieve fixation.

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