Rotary locking structure and folding fan

Abstract

Rotational locking structure (4), characterized in that it comprises a rotating seat (41), a fixed seat (42), a fixed bushing (43), an elastic bushing (44) and a rotating rod (45), wherein a first base sleeve (411) is arranged at one end of the rotating seat (41), a sleeve (421) is arranged on the fixed seat (42), and one end of the sleeve (421) is fixedly connected to a second base sleeve (4211) which extends coaxially to the sleeve (421); - wherein the rotary rod (45) comprises a rod body (451) and a rod base (452) which are rigidly connected to each other, and the rod body (451) and the rod base (452) are both cylindrical and the rod body (451) and the rod base (452) are coaxial; - during the installation of the rotational locking structure (4), the elastic bushing (44) runs through the rod body (451) and is fixedly mounted on the rod base (452), the fixed bushing (43) being fixedly arranged in the second base sleeve (4211), the rod body (451) passing through the fixed bushing (43) and the sleeve (421) and being inserted into the first base sleeve (411) and being relatively fixed relative to the first base sleeve (411); - wherein several support bridges (442) are formed on the elastic bushing (44) and are evenly distributed around the axis of the elastic bushing (44), wherein the support bridges (442) are raised and are arranged close to the fixed bushing (43), and the support bridges (442) can cause elastic deformation in the axial direction of the elastic bushing (44); - wherein the number of support bridges (442) is even, wherein locking seats (443) projecting towards the fixed bushing (43) are formed on two centrally symmetrical support bridges (442), wherein the outer contour of the locking seat (443) is arcuate, wherein two groups of locking hole groups (432) are arranged symmetrically on the fixed bushing (43) around the axis of the fixed bushing (43), wherein each locking hole group (432) comprises several locking holes (4321) distributed at equal intervals, and the locking holes (4321) are designed to engage in the locking seats (443).

Description

Technical area

[0001] The present invention relates to the technical field of fans, particularly to a rotation locking structure and a folding fan. State of the art

[0002] To facilitate packaging and storage, existing fans are typically designed to be foldable and often use rotational folding, with the base being rotatable relative to the bracket. Since users want to adjust the fan's installation angle, rotating the base relative to the bracket should also lock the angle. For example, patent document CN216922578U discloses a telescopically foldable fan in which a gear-like adjustment groove is provided in the through-hole of the adjustment base, and a spring-driven limit block is attached to the drive rod, which engages the adjustment groove under spring pressure to achieve locking. However, the spring and limit platform of the rotating locking components must be mounted radially, while the other main components are mounted axially, which makes the installation process difficult. Contents of the present invention

[0003] The embodiments of this invention provide a rotation locking structure and a folding fan to solve the problem of the poor structural design of the rotation locking structure of folding fans in the existing art and the not easy installation process.

[0004] In order to achieve the above-mentioned object, the embodiment of this invention adopts the following technical solutions: A rotation locking structure includes a rotating seat, a fixed seat, a fixed bushing, a resilient bushing, and a rotating rod, wherein a first socket sleeve is disposed at one end of the rotating seat, a sleeve is disposed on the fixed seat, and one end of the sleeve is fixedly connected to a second socket sleeve coaxial with the sleeve; wherein the rotating rod comprises a rod body and a rod base which are fixedly connected to each other, and the rod body and the rod base are both cylindrical and the rod body and the rod base are coaxial; wherein, in the installation of the rotation locking structure, the elastic bushing extends the rod body and is fixedly mounted on the rod base, the fixed bushing is fixedly arranged in the second base sleeve, the rod body extends through the fixed bushing and the sleeve and is inserted into the first base sleeve and is relatively fixed relative to the first base sleeve; wherein a plurality of support bridges are formed on the elastic bushing and evenly distributed around the axis of the elastic bushing, the support bridges being raised and arranged close to the fixed bushing, and the support bridges can cause elastic deformation in the axial direction of the elastic bushing; wherein the number of support bridges is even, wherein locking seats projecting towards the fixed socket are formed on two centrally symmetrical support bridges, wherein the outer contour of the locking seat is arcuate, wherein two groups of locking hole groups are arranged symmetrically on the fixed socket around the axis of the fixed socket, wherein each locking hole group comprises a plurality of locking holes distributed at equal intervals, and the locking holes are designed to engage with the locking seats. Furthermore, two first positioning holes are arranged symmetrically on the fixed socket around the axis of the fixed socket, wherein a plurality of first positioning seats corresponding to the positions and numbers of the first positioning holes are provided on the inner bottom surface of the second base sleeve.

[0005] Furthermore, an engagement slope is formed at an end of the rod body remote from the rod base, so that the cross section of the rod body at the engagement slope is not circular; wherein a plurality of fixed teeth are arranged around the inside of the first base sleeve and the contour formed by the fixed teeth coincides with the cross-sectional contour of the rod body at the engagement bevel.

[0006] Furthermore, a plurality of first mounting holes are provided through the inner bottom of the first base sleeve, and a plurality of second mounting holes are provided at an end of the rod body remote from the rod base.

[0007] Furthermore, a fastening platform projecting in the direction of the rod base is formed between two adjacent support bridges on the elastic bushing, wherein second positioning holes are provided in the fastening platform, and second positioning seats are arranged on the rod base in a position and number corresponding to the second positioning holes.

[0008] Furthermore, at least one support bridge is provided with third positioning holes, and third positioning seats are also arranged on the rod base (452) in a position and number corresponding to the third positioning holes.

[0009] A folding fan comprises a base, a bracket, a fan body and the aforementioned rotation locking structure, wherein the bracket consists of an arc frame and two arms assembled into a U-shape; wherein a rotation locking structure is installed on each of both sides of the base, the fixed seat being fixedly disposed inside the base and the rotating seat being fixedly connected to an end of the boom remote from the arch frame; wherein the two sides of the fan body are rotatably connected to the two arms of the bracket, and the installation position of the fan body is near the arch frame.

[0010] Furthermore, the boom comprises a first boom and a second boom, wherein the first boom is hollow so that the second boom can be inserted into the interior of the first boom and moves along the longitudinal direction of the first boom, whereby the boom is telescopic.

[0011] The beneficial effects of this invention are: In this invention, through the combination of elastic bushing and fixed bushing, the relative position of the fixed seat and rotating seat can be adjusted and locked, and the assembly can be easily completed by axial assembly, the installation process is simple. Brief description of the characters Fig. 1 is a perspective view of the folding fan; Fig. 2 is an exploded view of the rotation locking structure; Fig. 3 is a perspective view of the rotary bracket; Fig. 4 is a side view of the rotating seat; Fig. 5 is a perspective view of the fixed seat; Fig. 6 is a perspective view of the fixed seat from a different angle; Fig. 7 is a perspective view of the fixed bushing; Fig. 8 is a side view of the fixed socket; Fig. 9 is a three-dimensional view of the elastic bushing; Fig. 10 is a side view of the elastic bushing; Fig. 11 is a three-dimensional view of the rotary rod; Fig. 12 is a side view of the rotating rod; Fig. 13 is a schematic diagram of the fully folded folding fan; Fig. 14 is a front view of the folding fan in the boom extended state; Fig. 15 is a side view of the folding fan with the boom extended. Detailed embodiments

[0012] The specific embodiments of this application are explained in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit this application.

[0013] As in Fig. 1, the embodiment of the present invention provides a folding fan comprising a base 1, a bracket 2, a fan body 3, and a rotation locking structure 4, wherein the bracket 2 is composed of an arc frame 21 and two outriggers 22 in a U-shape; A rotation locking structure 4 is attached to each of the two sides of the base 1, and the end of the outrigger 22 remote from the arc frame 21 is rotatably connected to the rotation locking structure 4 so that the bracket 2 can rotate around the base 1; The two sides of the fan body 3 are respectively rotatably connected to the two outriggers 22 of the bracket 2, and the installation position of the fan body 3 is near the arc frame 21;The design that the bracket 2 can rotate around the base 1, in combination with the design that the fan body 3 can rotate within the bracket 2, realizes the folding of the folding fan; As shown in ; Fig. 13, in the fully folded state, both the base 1 and the fan body 3 can be rotated in a direction parallel to the extension direction of the boom 22, which facilitates storage.

[0014] As in the Fig. 2-12, the embodiment of the present invention provides a rotation locking structure 4 comprising a rotating seat 41, a fixed seat 42, a fixed bushing 43, an elastic bushing 44, and a rotating rod 45; wherein the rotating seat 41 is configured to connect the bracket 2 in the folding fan (specifically, connected to the end of the boom 22 remote from the arc frame 21), and one end of the rotating seat 41 is provided with a first base sleeve 411; the fixed seat 42 is used for fixed installation inside the base 1, a sleeve 421 is mounted on the fixed seat 42, and one end of the sleeve 421 is fixedly coaxially connected to a second base sleeve 4211; The rotary rod 45 includes a rod body 451 and a rod base 452 which are fixedly connected to each other, and the rod body 451 and the rod base 452 are both cylindrical and the rod body 451 and the rod base 452 are coaxial; When installing the rotation locking structure 4, the elastic bushing 44 extends through the rod body 451 and is fixedly mounted on the rod base 452 (the rod base 452 and the elastic bushing 44 cannot rotate relative to each other). The fixed bushing 43 is fixedly disposed in the second base sleeve 4211 (the fixed bushing 43 and the second base sleeve 4211 cannot rotate relative to each other). The rod body 451 passes through the fixed bushing 43 and the sleeve 421 and is inserted into the first base sleeve 411, being fixed relative to the first base sleeve 411 (at this time, the rod body 451, the elastic bushing 44, the fixed bushing 43, the sleeve 421, and the first base sleeve 411 are coaxial).

[0015] As a major improvement of this invention, a plurality of support bridges 442 are evenly distributed on the elastic bushing 44 around the axis of the elastic bushing 44. The support bridges 442 are raised and close to the fixed bushing 43. Obviously, the support bridges 442 can generate elastic deformation in the axial direction of the elastic bushing 44. The number of support bridges 442 is even (in a preferred embodiment, four support bridges 442 are formed on the elastic bushing 44), and locking seats 443 are formed on two centrally symmetrical support bridges 442, which are raised toward the fixed bushing 43. The outer profile of the locking seats 443 is arcuate. On the fixed bushing 43, two groups of locking hole groups 432 are arranged centrally symmetrically around the axis of the fixed bushing 43.Each locking hole group 432 includes a plurality of evenly distributed locking holes 4321 used for embedding with the locking seats 443.

[0016] In the assembled state in the rotation locking structure 4 provided by the invention, the locking seat 443 and the locking hole 4321 are engaged with each other, so that the elastic bushing 44 and the fixed bushing 43 cannot rotate relative to each other. However, since the support bridge 442 can generate elastic deformation in the axial direction of the elastic bushing 44 and the outer contour of the locking seat 443 is arcuate, when an external force is applied that relatively rotates the elastic bushing 44 and the fixed bushing 43, the support bridge 442 is compressed by pressing the locking seat 443 in the axial direction of the elastic bushing 44, causing the locking seat 443 to exit from the locking hole 4321 and slide into the locking hole group 432 to engage with an adjacent other locking hole 4321.After that, when the external force is no longer applied, the relative position of the elastic bushing 44 and the fixed bushing 43 is fixed again. In the rotation locking structure 4 provided by the invention, the cooperation of the elastic bushing 44 and the fixed bushing 43 not only adjusts the relative position of the fixed seat 42 and the rotating seat 41, but also achieves locking, and the assembly can be easily completed by axial assembly, simplifying the installation process.

[0017] Specifically, in order to realize the fixation of the fixed socket 43 and the second socket sleeve 4211, two first positioning holes 431 are arranged on the fixed socket 43 symmetrically about the axis of the fixed socket 43, and first positioning seats 42111 are arranged on the inner bottom surface of the second socket sleeve 4211 according to the position and number of the first positioning holes 431 (obviously, the positions of the first positioning holes 431 are offset from the locking hole group 432).

[0018] Specifically, in order to fix the rotating rod 45 and the first socket sleeve 411, an engagement slope 4511 is formed at the end of the rod body 451 remote from the rod base 452, so that the cross section of the rod body 451 at the engagement slope 4511 is not circular; the inside of the first socket sleeve 411 is surrounded by a plurality of fixed teeth 412 whose outline coincides with the cross section of the rod body 451 at the engagement slope 4511, so that the rod body 451 can be inserted and assembled into the first socket sleeve 411, and the rod body 451 and the first socket sleeve 411 cannot rotate relative to each other.

[0019] To further strengthen the secure connection between the rod body 451 and the first socket sleeve 411, a plurality of first fastening holes 413 are arranged throughout the inner bottom of the first socket sleeve 411. A plurality of second fastening holes 4512 are provided at the end of the rod body 451 remote from the rod base 452. After the rod body 451 is inserted into the first socket sleeve 411, the relative position of the rod body 451 and the first socket sleeve 411 is fixed by inserting fasteners such as screws and bolts through the first fastening holes 413 and into the second fastening holes 4512.

[0020] To fix the elastic bushing 44 and the rod base 452, a fastening platform 441 projecting toward the rod base 452 is formed, in particular, between two adjacent support bridges 442 of the elastic bushing 44. A second positioning hole 4411 is arranged in the fastening platform 441, and second positioning seats 4521 are mounted on the rod base 452, which correspond in position and number to the second positioning holes 4411. By inserting the second positioning seat 4521 into the second positioning hole 4411, the elastic bushing 44 and the rod base 452 are fixed.

[0021] Furthermore, to keep the relative position of the elastic bushing 44 and the rod base 452 constant during repeated assembly, at least one support bridge 442 is provided with third positioning holes 444. Third positioning seats 4522 are also mounted on the rod base 452, which correspond in position and number to the third positioning holes 444. By inserting the third positioning seat 4522 into the third positioning hole 444, the relative position of the elastic bushing 44 and the rod base 452 is kept constant during repeated assembly.

[0022] In addition, considering the height adjustment requirements of the fan body 3 in the usage scenarios of the folding fan, as shown in the Fig.As shown in Figures 13-15, in an improved embodiment of the folding fan of this invention, the boom 22 is telescopic. The boom 22 includes a first boom 221 and a second boom 222, the first boom 221 being hollow so that the second boom 222 can be inserted into the interior of the first boom 221 and moves along the longitudinal direction of the first boom to realize telescoping of the boom 22 and adjust the height of the fan body 3.

[0023] The above-described embodiments merely illustrate the mode of carrying out the present invention, but are not to be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of the present invention. Therefore, the scope of the present patent should be determined by the appended claims. List of reference symbols: 1 base 2 bracket 22 booms 221 First boom 222 Second boom 21 arch frames 3 fan bodies 4 Rotation locking structure 41 Rotating seat 411 First socket sleeve 412 Fixed tooth 413 First mounting hole 42 Firm seat 421 sleeve 4211 Second socket sleeve 42111 First positioning seat 43 Fixed socket 431 First positioning hole 432 locking hole group 4321 locking hole 44 Elastic bushing 441 Mounting platform 4411 Second positioning hole 442 Support Bridge 443 locking seat 444 Third positioning hole 45 Rotating rod 451 rod body 4511 engagement bevel 4512 Second mounting hole 452 pole base 4521 Second positioning seat 4522 Third positioning seat QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] CN 216922578U

[0002]

Claims

[1] Rotation locking structure (4), characterized by that it comprises a rotating seat (41), a fixed seat (42), a fixed bushing (43), an elastic bushing (44) and a rotating rod (45), wherein a first base sleeve (411) is arranged at one end of the rotating seat (41), a sleeve (421) is arranged on the fixed seat (42), and one end of the sleeve (421) is fixedly connected to a second base sleeve (4211) which is coaxial with the sleeve (421); - wherein the rotary rod (45) comprises a rod body (451) and a rod base (452) which are fixedly connected to each other, and the rod body (451) and the rod base (452) are both cylindrical and the rod body (451) and the rod base (452) are coaxial; - when installing the rotation locking structure (4), the elastic bushing (44) extends the rod body (451) and is fixedly mounted on the rod base (452), the fixed bushing (43) is fixedly arranged in the second base sleeve (4211), the rod body (451) extends through the fixed bushing (43) and the sleeve (421) and is inserted into the first base sleeve (411) and is relatively fixed relative to the first base sleeve (411); - wherein a plurality of support bridges (442) are formed on the elastic bushing (44) and are evenly distributed around the axis of the elastic bushing (44), wherein the support bridges (442) are raised and arranged close to the fixed bushing (43), and the support bridges (442) can cause an elastic deformation in the axial direction of the elastic bushing (44); - wherein the number of support bridges (442) is even, wherein locking seats (443) projecting towards the fixed bushing (43) are formed on two centrally symmetrical support bridges (442), wherein the outer contour of the locking seat (443) is arcuate, wherein two groups of locking hole groups (432) are arranged symmetrically on the fixed bushing (43) around the axis of the fixed bushing (43), wherein each locking hole group (432) comprises a plurality of locking holes (4321) distributed at equal intervals, and the locking holes (4321) are designed to engage in the locking seats (443). [2] Rotation locking structure according to claim 1, characterized bythat two first positioning holes (431) are arranged symmetrically on the fixed bushing (43) around the axis of the fixed bushing (43), wherein a plurality of first positioning seats (42111) corresponding to the positions and numbers of the first positioning holes (431) are provided on the inner bottom surface of the second base sleeve (4211). [3] Rotation locking structure (4) according to claim 1, characterized by that an engagement slope (4511) is formed at an end of the rod body (451) remote from the rod base (452), so that the cross section of the rod body (451) at the engagement slope (4511) is not circular; - wherein a plurality of fixed teeth (412) are arranged around the inside of the first base sleeve (411) and the contour formed by the fixed teeth (412) coincides with the cross-sectional contour of the rod body (451) on the engagement bevel (4511). [4] Rotation locking structure (4) according to claim 3, characterized by that a plurality of first fastening holes (413) are provided through the inner bottom of the first base sleeve (411), and a plurality of second fastening holes (4512) are provided at an end of the rod body (451) remote from the rod base (452). [5] Rotation locking structure (4) according to claim 1, characterized by that between two adjacent support bridges (442) on the elastic bushing (44) a fastening platform (441) projecting in the direction of the rod base (452) is formed, wherein second positioning holes (4411) are provided in the fastening platform (441), and second positioning seats (4521) are arranged on the rod base (452) in a position and number corresponding to the second positioning holes (4411). [6] Rotation locking structure (4) according to claim 5, characterized bythat at least one support bridge (442) is provided with third positioning holes (444), and on the rod base (452) third positioning seats (4522) are also arranged in a position and number corresponding to the third positioning holes (444). [7] Folding fan, characterized by that it comprises a base (1), a bracket (2), a fan body (3) and the rotation locking structure (4) according to any one of claims 1-6, wherein the bracket (2) consists of an arched frame (21) and two arms (22) assembled into a U-shape; - wherein a rotation locking structure (4) is installed on each of the two sides of the base (1), wherein the fixed seat (42) is fixedly arranged inside the base (1) and the rotating seat (41) is fixedly connected to an end of the boom (22) remote from the arch frame (21); - wherein the two sides of the fan body (3) are rotatably connected to the two arms (22) of the bracket (2), and the installation position of the fan body (3) is near the arched frame (21). [8] Folding fan according to claim 7, characterized by in that the boom (22) comprises a first boom (221) and a second boom (222), wherein the first boom (221) is hollow so that the second boom (222) can be inserted into the interior of the first boom (221) and moves along the longitudinal direction of the first boom (221), whereby the boom (22) is telescopic.

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