Fan stand column pipe connecting structure and electric fan

Abstract

The utility model relates to a fan stand column pipe connecting structure and an electric fan, the connecting structure comprises a plurality of stand column pipes which are arranged between a base and a fan head of the electric fan and are vertically spliced with each other, one of two adjacent stand column pipes is provided with an external thread part, the other stand column pipe is correspondingly provided with a hollow pipe part, and the connecting structure further comprises a connecting piece which is embedded in the hollow pipe part and connected with the external thread part. The threaded sleeve is arranged on the hollow pipe part and is in interference fit with the hollow pipe part, and the inner ring of the threaded sleeve is provided with an internal thread which is spirally fastened with the external thread part, so that the complexity of a stand column pipe mold is simplified, the mold design of the stand column pipe is simpler and more direct, and the manufacturing cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric fan, in particular to a fan stand pipe connecting structure and electric fan. BACKGROUND

[0002] In the current electric fan design, a spliced stand pipe structure is often used to achieve flexible switching between floor fan and table fan modes, so as to meet the demand of one machine for multiple uses.

[0003] However, most of the spliced electric fan stand pipes on the current market use internal and external thread fixing structures to realize the splicing function. For example, a fan with a threaded connection adjustable stand column in patent CN210660706U sets an internal thread in the stand pipe, and completes assembly through cooperation with the external thread of the external component.

[0004] However, since the internal thread structure needs to be formed inside the stand pipe, the corresponding mold design becomes extremely complex, affecting the actual production injection efficiency of the plastic part, and more importantly, due to uneven thickness of the plastic part, appearance shrinkage defects are prone to occur. SUMMARY

[0005] In view of the above problems, the present application proposes a fan stand pipe connecting structure and electric fan, aiming to solve the deficiencies in the prior art, simplify the production process, improve the production efficiency, and ensure the consistency of product quality and appearance.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0007] In a first aspect, the present application proposes a fan stand pipe connecting structure, which includes a plurality of stand pipes arranged perpendicularly between the base and the fan head of an electric fan, one of the adjacent two stand pipes is provided with an external thread part, and the other stand pipe is correspondingly provided with a hollow pipe part.

[0008] It also includes a threaded sleeve nested in the hollow pipe part and in interference fit with the hollow pipe part, and the inner ring of the threaded sleeve is provided with an internal thread for screw fastening with the external thread part.

[0009] This design simplifies the complexity of the stand pipe mold, making the mold design of the stand pipe itself more simple and direct, reducing the manufacturing cost. At the same time, it avoids the quality problems that may occur in the injection molding process due to the internal thread in the stand pipe, such as uneven thickness of the plastic part and appearance shrinkage phenomenon, thereby improving the production efficiency of the plastic part and the consistency of product quality.

[0010] Further, through the screw cooperation between the threaded sleeve and the external thread part and the interference fit between the threaded sleeve and the hollow pipe part, the tightness and stability of the connecting part are ensured.

[0011] In some possible implementation manners, the hollow tube part is arranged at an upper end of the stand pipe, and the external thread part is arranged at a lower end of the stand pipe.

[0012] In some possible implementation manners, a plurality of protrusions are arranged annularly on an outer periphery of the thread sleeve, and an inner ring of the hollow tube part is provided with a plurality of recesses in which the protrusions are nestable.

[0013] In some possible implementation manners, the number of the protrusions and the recesses is 4 respectively.

[0014] In some possible implementation manners, the number of the internal thread turns of the thread sleeve is 1 turn.

[0015] In some possible implementation manners, the number of the external thread turns of the external thread part is more than 3 turns, and the thread sleeve spirally passes through at least 2 turns of the external thread part.

[0016] In some possible implementation manners, an end surface of the external thread part is provided with a pressure-resistant hole.

[0017] In some possible implementation manners, an upper end of the external thread part is provided with a stepped part nestable into the hollow tube part.

[0018] In a second aspect, the application provides an electric fan using the fan stand pipe connecting structure as described above. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic diagram of an electric fan to which the fan stand pipe connecting structure of the application is applied;

[0020] Figure 2 is an exploded schematic diagram of the application of the fan stand pipe connecting structure of the application;

[0021] Figure 3 is a partial enlarged schematic diagram of the fan stand pipe connecting structure of the application;

[0022] Figure 4 is a sectional view of the application of the fan stand pipe connecting structure of the application;

[0023] Figure 5 is Figure 4 a partial enlarged schematic diagram at A in FIG. 4. DETAILED DESCRIPTION

[0024] The features of the application and other related features are further described in detail below by way of examples, so as to facilitate the understanding of the same by those skilled in the art:

[0025] It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to the directions towards or away from the geometric center of a particular component.

[0026] Further, unless otherwise clearly indicated and limited, the terms "mount", "connect", "connection" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this case can be understood according to the specific circumstances.

[0027] Please refer to Figure 1 The electric fan involved in the present application is provided with a base 100 and a fan head 200, and the distance between the base 100 and the fan head 200 is different, and their purposes are also different. The distance can be changed to switch between floor fans and table fans.

[0028] Therefore, a fan column pipe connecting structure of the present application includes a plurality of column pipes 300 which are vertically spliced between the base 100 and the fan head 200. The upper end of the column pipe 300 connected with the fan head 200 is provided with a folding structure of the fan head 200, etc. The lower end of the column pipe 300 connected with the base 100 can be stably connected by a bottom long bolt penetrating type, etc. Therefore, the column pipes 300 connected with the base 100 and the fan head 200 are not the pipes which can be pulled out during adjustment. The present application mainly aims at the upper and lower ends of the column pipes 300 which can be pulled out, and the invention design of the column pipes 300 corresponding to the upper and lower ends.

[0029] Please refer to Figures 2 to 5 One of the two adjacent column pipes 300 is provided with an external thread part 1, and the other column pipe 300 is correspondingly provided with a hollow pipe part 2, that is, the external thread part 1 is sleeved into the hollow pipe part 2 of the other column pipe 300. Therefore, in order to facilitate installation during assembly, the hollow pipe part 2 is arranged at the upper end of the column pipe 300, and the external thread part 1 is arranged at the lower end of the column pipe 300.

[0030] At this time, a threaded sleeve 3 is arranged in the hollow pipe part 2, and the threaded sleeve 3 is nested in the hollow pipe part 2 and is in interference fit with the hollow pipe part 2. Please refer to Figure 3In this embodiment, one type of interference fit that can be achieved is that a plurality of protrusions 31 are arranged annularly on the outer periphery of the threaded sleeve 3, and a plurality of recesses 21 that can nest the protrusions 31 are arranged annularly on the inner periphery of the hollow tube portion 2. Preferably, the number of protrusions 31 and recesses 21 is 4, which are evenly distributed around the periphery, and a tool clamp can be used to press the threaded sleeve 3 into the hollow tube portion 2 for fixation.

[0031] In terms of material selection, the column tube 300 and the threaded sleeve 3 can both be made of ABS material (acrylonitrile-butadiene-styrene copolymer), which has excellent processing performance, good chemical corrosion resistance, and high cost performance.

[0032] Further, the inner periphery of the threaded sleeve 3 is provided with an internal thread 32 that is screwed with the external thread portion 1. Preferably, the number of turns of the internal thread 32 is 1. Correspondingly, in the preferred embodiment, the number of turns of the external thread portion 1 is 3 or more, and the threaded sleeve 3 screws through at least 2 turns of the external thread portion 1. When it is screwed in, there is a risk of deformation of the thread under pressure, so an anti-pressure hole 11 is provided on the end face of the external thread portion 1. When subjected to pressure, the anti-pressure hole 11 can deform to transfer the risk of damage to the thread.

[0033] In this way, the tightness and stability of the connection part are ensured by the screwing between the threaded sleeve 3 and the external thread portion 1 and the interference fit between the threaded sleeve 3 and the hollow tube portion 2.

[0034] Please refer to Figure 5 The upper end of the external thread portion 1 is provided with a stepped portion 12 that can be nested into the hollow tube portion 2. The stepped portion 12 is between the external thread portion 1 and the column tube 300. Since the external thread portion 1 is screwed into the threaded sleeve 3, there is a large gap between the outer periphery of the external thread portion 1 and the hollow tube portion 2, so the stepped portion 12 is provided to nest into the hollow tube portion 2, making the splicing structure more stable.

[0035] In this way, the fan column tube connection structure of the present application simplifies the complexity of the column tube 300 mold, making the mold design of the column tube 300 itself more simple and direct, and reducing the manufacturing cost. At the same time, it avoids the quality problems that may occur in the injection molding process due to the internal thread in the column tube 300, such as uneven thickness of the plastic part and shrinkage phenomenon, thereby improving the production efficiency and consistency of product quality of the plastic part.

[0036] As mentioned above, the present application protects a fan column tube connection structure and an electric fan, and all technical solutions that are the same or similar to the present application shall be deemed to fall within the scope of protection of the present application.

Claims

1. A fan standpipe connection structure, characterized by, The fan column pipe connecting structure comprises a plurality of column pipes (300) arranged perpendicularly between a base (100) and a fan head (200) of an electric fan, one of the adjacent column pipes (300) is provided with an external thread part (1), and the other column pipe (300) is correspondingly provided with a hollow pipe part (2); The fan column pipe connecting structure further comprises a threaded sleeve (3) nested in the hollow pipe part (2) and in interference fit with the hollow pipe part (2), and an inner ring of the threaded sleeve (3) is provided with an inner thread (32) for screwing with the external thread part (1).

2. A fan standpipe coupling structure as claimed in claim 1, wherein, The hollow pipe part (2) is arranged at an upper end of the column pipe (300), and the external thread part (1) is arranged at a lower end of the column pipe (300).

3. A fan standpipe coupling structure as claimed in claim 1, wherein, The fan column pipe connecting structure further comprises a plurality of protrusions (31) arranged annularly on an outer periphery of the threaded sleeve (3), and an inner ring of the hollow pipe part (2) is provided with a plurality of grooves (21) for nesting the protrusions (31).

4. A fan standpipe coupling structure as claimed in claim 3, wherein, The number of the protrusions (31) and the grooves (21) is 4 respectively.

5. A fan standpipe coupling structure as claimed in claim 1, wherein, The number of turns of the inner thread (32) of the threaded sleeve (3) is 1.

6. A fan standpipe coupling structure as claimed in claim 5, wherein, The number of turns of the external thread part (1) is more than 3, and the threaded sleeve (3) is screwed through at least 2 turns of the external thread part (1).

7. A fan standpipe coupling structure as claimed in claim 6, wherein, An end surface of the external thread part (1) is provided with a pressure-resistant hole (11).

8. A fan standpipe coupling structure as claimed in claim 1, wherein, An upper end of the external thread part (1) is provided with a stepped part (12) nested in the hollow pipe part (2).

9. An electric fan characterized by comprising: The fan column pipe connecting structure comprises a fan head (200), a base (100), and a plurality of column pipes (300) arranged perpendicularly between the fan head (200) and the base (100). The fan column pipe connecting structure according to any one of claims 1 to 8.

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