Plane fan with pitching positioning structure

Abstract

The fan head is rotatably connected to the fan support through a rotating shaft, a pitching positioning structure is arranged between the fan head and the fan support, the pitching of the fan head can be adjusted relative to the fan support through the pitching positioning structure, and the pitching positioning structure comprises a spring, a positioning column and a gear plate. The gear plate is fixedly connected to the fan support, the positioning columns are arranged on the corresponding fan heads in a sliding mode, the moving direction of the positioning columns is perpendicular to the plane where the rotating direction of the fan heads is located, the gear plate is provided with a plurality of positioning grooves in the circumferential direction of the rotating shaft, and the springs always drive the positioning columns to abut against the interiors of the corresponding positioning grooves. The fan head pitch angle adjusting device has the advantages that the fan head pitch angle adjusting mode is convenient, the positioning structure is simple, and installation is convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of electric fan technology, and in particular to a planar fan with a pitch positioning structure. Background Technology

[0002] A Chinese patent with publication number CN221442952U discloses a multi-directional adjustable wall fan that is easy to install. It includes a U-shaped bracket, with a fan body hinged between the two free ends of the U-shaped bracket, allowing it to tilt and rotate. A connecting piece is hinged at the center of the tail end of the U-shaped bracket, allowing it to rotate left and right. A mounting bracket that can be pre-fixed to the wall is detachably connected to one side of the connecting piece. The purpose of this invention is to provide a method where the fan body is hinged to the U-shaped bracket, the U-shaped bracket is then hinged to one end of a swing arm, and the other end of the swing arm is hinged to a connecting base. The two free ends of the U-shaped bracket are respectively provided with locking components C that lock the tilt angle of the fan body. Each locking component C includes a knob threadedly connected to the hinge shaft where the U-shaped bracket and the fan body are hinged, with the inner side of the knob abutting against the outer wall of the corresponding U-shaped bracket.

[0003] However, the aforementioned multi-directional adjustable wall fan has the following drawbacks: the adjustment method of the pitch angle of its fan body relative to the U-shaped bracket is relatively complicated, requiring the use of locking component C to lock the fan body in the corresponding pitch position, and the adjustment process is relatively laborious, which urgently needs to be improved. Utility Model Content

[0004] The purpose of this invention is to provide a planar fan with a pitch positioning structure, which has the advantages of convenient adjustment of the fan head pitch angle and simple and convenient installation of the positioning structure.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a planar fan with a pitch positioning structure, comprising a fan bracket and a fan head rotatably connected to the fan bracket via a rotating shaft. A pitch positioning structure is provided between the fan head and the fan bracket. The fan head can be pitched relative to the fan bracket through the pitch positioning structure. The pitch positioning structure includes a spring, a positioning post, and a stop plate. The stop plate is fixedly connected to the fan bracket. The positioning post is slidably disposed on the corresponding fan head, and the movement direction of the positioning post is perpendicular to the plane containing the rotation direction of the fan head. The stop plate is provided with a plurality of positioning grooves along the circumference of the rotating shaft. The spring always has a tendency to drive the positioning post to press against the corresponding positioning groove, so that the fan head and the stop plate are in a non-rotating engagement.

[0006] By adopting the above technical solution, when the user needs to adjust the blowing pitch angle of the fan head, the fan bracket can be kept still, and then the fan head can be pressed to make it rotate along the shaft. As the fan head rotates from the first position to the second position, the spring drives the positioning pin to jump between adjacent positioning slots. When the pitch angle of the fan head is adjusted to the correct position, the spring pushes the positioning pin to abut against the corresponding positioning slot, so that the fan head stops rotating relative to the stop plate. Since the stop plate is fixed on the fan bracket, the fan head is positioned relative to the fan bracket to stop rotating. This utility model adds a stop plate between the fan head and the fan bracket, which has a simple structure and is easy to install. It has the effects of convenient adjustment of the fan head pitch angle and simple positioning structure for easy installation.

[0007] A further feature of this invention is that the cross-section of the positioning groove is V-shaped.

[0008] By adopting the above technical solution, the V-shaped positioning groove has inclined sides, which is beneficial for the positioning pin to be better disengaged from the positioning groove when the fan head rotates relative to the fan bracket.

[0009] A further feature of this invention is that the stop plate is provided with a first arc guide surface along the circumference of the rotating shaft, the fan head includes a rotating connecting part, and the side wall of the rotating connecting part is provided with a second arc guide surface along the circumference of the rotating shaft. When the rotating connecting part rotates relative to the stop plate, the first arc guide surface and the second arc guide surface guide and cooperate with each other.

[0010] By adopting the above technical solution and utilizing the guiding effect of the first and second arc guide surfaces, the concentricity of the rotating connection part of the fan head relative to the baffle plate can be improved.

[0011] A further feature of this invention is that a plurality of the positioning grooves are formed on the first arc guide surface.

[0012] A further feature of this invention is that the rotating connecting part has a receiving cavity on the side facing the stop plate, the receiving cavity is parallel to the axial direction of the rotating shaft, and the spring and the positioning pin are disposed in the receiving cavity.

[0013] By adopting the above technical solution, the spring always tends to push the positioning pin out of the receiving cavity and abut against the corresponding positioning groove.

[0014] A further feature of this invention is that: a positioning rib is protruding on the side of the stop plate away from the rotating connection part; an installation groove is provided at the upper end of the fan bracket; the rotating connection part is rotatably disposed in the installation groove; and a snap-fit ​​groove is provided on the inner wall of the installation groove of the fan bracket; the positioning rib is inserted and fixed in the snap-fit ​​groove, so that the stop plate and the fan bracket are positioned and prevented from rotating.

[0015] By adopting the above technical solution, during assembly, simply align the positioning ribs of the baffle plate with the snap-fit ​​grooves of the fan bracket, and then vertically insert the baffle plate into the corresponding snap-fit ​​grooves to complete the installation and fixation of the baffle plate on the fan bracket. The installation method of the baffle plate is simple and convenient.

[0016] A further feature of this invention is that a first limiting structure and a second limiting structure are provided between the stop plate and the rotating connecting part. Under the limiting action of the first limiting structure and the second limiting structure, the rotating connecting part can rotate relative to the stop plate within a predetermined angle range.

[0017] By adopting the above technical solution, the rotating connection part can only be tilted and rotated relative to the stop plate within a predetermined angle range. Moreover, the angle limiting method of the double limit structure can effectively prevent the rotating connection part from being damaged due to excessive rotational stress.

[0018] A further feature of this invention is that the first limiting structure includes two first limiting grooves and a first limiting part. The two first limiting grooves are arranged opposite to each other on both sides of the rotating connection part with the rotating shaft as the center. The two first limiting parts are arranged opposite to each other on both sides of the stop plate. The first limiting part is movably disposed in the corresponding first limiting groove.

[0019] By adopting the above technical solution, when the fan head rotates along the shaft, the first limiting part rotates in the first limiting groove. When the first limiting part rotates to the two side walls of the first limiting groove, the fan head and the baffle plate can be stopped and limited.

[0020] A further feature of this invention is that the second limiting structure includes two second limiting grooves and a second limiting part. The two second limiting grooves are arranged opposite to each other on both sides of the rotating connection part with the rotating shaft as the center. The two second limiting parts are arranged opposite to each other on both sides of the stop plate. The second limiting part is movably disposed in the corresponding second limiting groove. The first limiting part is disposed on both sides of the stop plate along a first direction, and the second limiting part is disposed on both sides of the stop plate along a second direction perpendicular to the first direction.

[0021] By adopting the above technical solution, unlike the method of using only one set of limiting structures, this utility model uses a first limiting structure and a second limiting structure to cooperate with each other, which can effectively prevent the damage of the cooperating parts due to excessive rotational stress applied to the fan head.

[0022] A further feature of this invention is that the positioning post includes a clamping part and a plugging part, the plugging part is inserted into the spring so that one end of the spring abuts against the clamping part, and the end of the clamping part facing the positioning groove is spherical.

[0023] By adopting the above technical solution, the insertion part is inserted into the spring, which helps to improve the consistency of the spring's elastic deformation direction. The spherical end face of the abutment part facilitates the smooth sliding of the abutment part out of the positioning groove.

[0024] In summary, this utility model has the following beneficial effects:

[0025] This invention employs a mounting groove on the upper end of the fan bracket. The rotating connection part of the fan head is rotatably mounted in the mounting groove via a rotating shaft, allowing the fan head to tilt relative to the fan bracket. A stop plate is fixed within the mounting groove of the fan bracket, and the stop plate has several positioning grooves along the circumference of the rotating shaft. A spring and a positioning pin are installed in the accommodating cavity of the rotating connection part. The spring drives the positioning pin to press against the corresponding positioning groove, preventing the fan head from rotating and locking the fan head to the fan bracket. This invention, by adding a stop plate between the fan head and the fan bracket, has a simple structure and is easy to install, offering convenient adjustment of the fan head's tilt angle and a simple positioning structure for easy installation. Attached Figure Description

[0026] Figure 1 This is an overall structural diagram of the present invention.

[0027] Figure 2 This is an exploded view of the rotating connecting part, the stop plate, and the fan bracket of this utility model.

[0028] Figure 3 This is a utility model Figure 2 Another perspective.

[0029] Figure 4 This is a longitudinal sectional view of the present invention along the axial direction of the positioning column.

[0030] Figure 5 This is a structural diagram of the stop plate of this utility model.

[0031] Figure 6 This is a view of the gear shift plate of this utility model from another perspective.

[0032] In the diagram: 1. Fan bracket; 1a. Mounting groove; 1b. Snap-fit ​​groove; 2. Fan head; 21. Rotating connection part; 21a. Accommodating cavity; 21b. First limiting groove; 21c. Second limiting groove; 211. Second arc guide surface; 3. Stop plate; 3a. Positioning groove; 3b. Through hole; 31. First arc guide surface; 32. Positioning rib; 33. First limiting part; 34. Second limiting part; 4. Spring; 5. Positioning post; 51. Clamping part; 52. Insertion part; 6. Rotating shaft. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings.

[0034] A planar fan with a pitch positioning structure, such as Figure 1-2 and Figure 6 As shown, the fan includes a fan bracket 1 and a fan head 2 rotatably connected to the fan bracket 1 via a rotating shaft 6. A pitch positioning structure is provided between the fan head 2 and the fan bracket 1, allowing the fan head 2 to be adjusted in pitch relative to the fan bracket 1. The pitch positioning structure includes a spring 4, a positioning post 5, and a stop plate 3. The stop plate 3 is fixedly connected to the fan bracket 1, and a through hole 3b is opened at the center of the stop plate 3 corresponding to the rotating shaft 6. The positioning post 5 is slidably disposed on the corresponding fan head 2, and the direction of movement of the positioning post 5 is perpendicular to the plane containing the rotation direction of the fan head 2. The stop plate 3 has several positioning grooves 3a along the circumference of the rotating shaft 6. The spring 4 always drives the positioning post 5 to press against the corresponding positioning groove. In 3a, the fan head 2 and the baffle plate 3 are engaged in a movement that prevents rotation. The positioning groove 3a has a V-shaped cross-section. The two side walls of the V-shaped positioning groove 3a are inclined, which facilitates the positioning post 5 to better disengage from the positioning groove 3a when the fan head 2 rotates relative to the fan bracket 1. The positioning post 5 includes a clamping part 51 and a plugging part 52. The plugging part 52 is inserted into the spring 4, so that one end of the spring 4 abuts against the clamping part 51. The end of the clamping part 51 facing the positioning groove 3a is spherical. The positioning post 5 includes a clamping part 51 and a plugging part 52. The plugging part 52 is inserted into the spring 4, so that one end of the spring 4 abuts against the clamping part 51. The end of the clamping part 51 facing the positioning groove 3a is spherical.

[0035] like Figure 2-5As shown, the baffle plate 3 has a first arc guide surface 31 circumferentially along the rotating shaft 6. The fan head 2 includes a rotating connection part 21. The side wall of the rotating connection part 21 has a second arc guide surface 211 circumferentially along the rotating shaft 6. When the rotating connection part 21 rotates relative to the baffle plate 3, the first arc guide surface 31 and the second arc guide surface 211 guide and cooperate. By utilizing the guiding effect of the first arc guide surface 31 and the second arc guide surface 211, the concentricity of the rotating connection part 21 of the fan head 2 relative to the baffle plate 3 can be improved. Several positioning grooves 3a are formed on the first arc guide surface 31. A receiving cavity 21a is formed on the side of the rotating connection part 21 facing the baffle plate 3. The receiving cavity 21a is parallel to the axial direction of the rotating shaft 6. The spring 4 and the positioning post 5 are disposed in the receiving cavity 21a. Within a, the spring 4 always tends to push the positioning pin 5 out of the receiving cavity 21a and abut against the corresponding positioning groove 3a; the side of the stop plate 3 away from the rotating connection part 21 is provided with a positioning rib 32; the upper end of the fan bracket 1 is provided with an installation groove 1a; the rotating connection part 21 is rotatably set in the installation groove 1a; and the fan bracket 1 is provided with a snap-fit ​​groove 1b on the inner wall of the installation groove 1a; the positioning rib 32 is inserted and fixed in the snap-fit ​​groove 1b, so that the stop plate 3 and the fan bracket 1 are positioned and prevented from rotating. During assembly, simply align the positioning rib 32 of the stop plate 3 with the snap-fit ​​groove 1b of the fan bracket 1, and then vertically insert the stop plate 3 into the corresponding snap-fit ​​groove 1b to complete the installation and fixation of the stop plate 3 on the fan bracket 1. The installation method of the stop plate 3 is simple and convenient.

[0036] like Figure 2-6As shown, a first limiting structure and a second limiting structure are provided between the baffle plate 3 and the rotating connection part 21. Under the limiting action of the first limiting structure and the second limiting structure, the rotating connection part 21 can rotate relative to the baffle plate 3 within a predetermined angle range, so that the rotating connection part 21 can only tilt relative to the baffle plate 3 within a predetermined angle range. Moreover, the angle limiting method of the double limiting structure can effectively prevent the rotating connection part 21 from being damaged due to excessive rotational stress. The first limiting structure includes two first limiting grooves 21b and a first limiting part 33. The two first limiting grooves 21b are arranged opposite to each other on both sides of the rotating connection part 21 with the rotating shaft 6 as the center. The two first limiting parts 33 are arranged opposite to each other on both side walls of the baffle plate 3. The first limiting part 33 is movably disposed in the corresponding first limiting groove 21b. When the fan head 2 rotates along the rotating shaft 6, the first limiting part 33 is in the first limiting position. The fan head 2 rotates within the groove 21b. When the first limiting part 33 rotates to the two side walls of the first limiting groove 21b, the fan head 2 and the baffle plate 3 are stopped from rotating. The second limiting structure includes two second limiting grooves 21c and a second limiting part 34. The two second limiting grooves 21c are arranged opposite each other on both sides of the rotating connection part 21 with the rotating shaft 6 as the center. The two second limiting parts 34 are arranged opposite each other on the two side walls of the baffle plate 3. The second limiting parts 34 are movably arranged in the corresponding second limiting grooves 21c. The first limiting part 33 is arranged on both sides of the baffle plate 3 along the first direction, and the second limiting part 34 is arranged on both sides of the baffle plate 3 along the second direction perpendicular to the first direction. Unlike the method of using only one set of limiting structures, this utility model uses the first limiting structure and the second limiting structure to cooperate with each other, which can effectively prevent the damage of the mating parts due to excessive rotational stress applied to the fan head 2.

[0037] The basic working principle of this utility model is as follows: A mounting groove 1a is opened at the upper end of the fan bracket 1. The rotating connection part 21 of the fan head 2 is rotatably disposed in the mounting groove 1a via a rotating shaft 6, so that the fan head 2 can tilt and rotate relative to the fan bracket 1. At the same time, a stop plate 3 is fixed in the mounting groove 1a of the fan bracket 1. The stop plate 3 is provided with several positioning grooves 3a around the rotating shaft 6. A spring 4 and a positioning post 5 are provided in the receiving cavity 21a of the rotating connection part 21. When the fan head 2 rotates from the first position to the second position, the spring 4 drives the positioning post 5. Positioning post 5 bounces between adjacent positioning slots 3a. When the pitch angle of the fan head 2 is adjusted to the correct position, the spring 4 pushes the positioning post 5 to press against the corresponding positioning slot 3a, so that the fan head 2 stops rotating relative to the stop plate 3. Since the stop plate 3 is fixed on the fan bracket 1, the fan head 2 is positioned relative to the fan bracket 1 to stop rotating. This utility model adds a stop plate 3 between the fan head 2 and the fan bracket 1, which has a simple structure and is easy to install. It has the effects of convenient adjustment of the fan head pitch angle and simple positioning structure for easy installation.

[0038] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A planar fan with a pitch positioning structure, comprising a fan bracket (1) and a fan head (2) rotatably connected to the fan bracket (1) via a rotating shaft (6), wherein a pitch positioning structure is provided between the fan head (2) and the fan bracket (1), and the fan head (2) can be pitched relative to the fan bracket (1) through the pitch positioning structure, characterized in that: The pitch positioning structure includes a spring (4), a positioning post (5), and a stop plate (3). The stop plate (3) is fixedly connected to the fan bracket (1). The positioning post (5) is slidably disposed on the corresponding fan head (2), and the movement direction of the positioning post (5) is perpendicular to the plane where the rotation direction of the fan head (2) is located. The stop plate (3) is provided with several positioning grooves (3a) along the circumference of the rotating shaft (6). The spring (4) always has the tendency to drive the positioning post (5) to press against the corresponding positioning groove (3a), so that the fan head (2) and the stop plate (3) are in a stop-rotation cooperation.

2. A planar fan with a pitch positioning structure according to claim 1, characterized in that: The positioning groove (3a) has a V-shaped cross-section.

3. A planar fan with a pitch positioning structure according to claim 1, characterized in that: The baffle plate (3) is provided with a first arc guide surface (31) around the circumference of the rotating shaft (6). The fan head (2) includes a rotating connection part (21). The side wall of the rotating connection part (21) is provided with a second arc guide surface (211) around the circumference of the rotating shaft (6). When the rotating connection part (21) rotates relative to the baffle plate (3), the first arc guide surface (31) and the second arc guide surface (211) guide and cooperate.

4. A planar fan with a pitch positioning structure according to claim 3, characterized in that: Several of the positioning grooves (3a) are formed on the first arc guide surface (31).

5. A planar fan with a pitch positioning structure according to claim 3, characterized in that: The rotating connection part (21) has a receiving cavity (21a) on the side facing the stop plate (3). The receiving cavity (21a) is parallel to the axial direction of the rotating shaft (6). The spring (4) and the positioning pin (5) are disposed in the receiving cavity (21a).

6. A planar fan with a pitch positioning structure according to claim 3, characterized in that: The stop plate (3) has a positioning rib (32) protruding on the side away from the rotating connection part (21). The upper end of the fan bracket (1) has an installation groove (1a). The rotating connection part (21) is rotatably disposed in the installation groove (1a). The fan bracket (1) has a snap-fit ​​groove (1b) on the inner wall of the installation groove (1a). The positioning rib (32) is inserted and fixed in the snap-fit ​​groove (1b) so that the stop plate (3) and the fan bracket (1) are positioned and prevented from rotating.

7. A planar fan with a pitch positioning structure according to claim 3, characterized in that: The stop plate (3) and the rotating connection part (21) are provided with a first limiting structure and a second limiting structure. Under the limiting action of the first limiting structure and the second limiting structure, the rotating connection part (21) can rotate relative to the stop plate (3) within a predetermined angle range.

8. A planar fan with a pitch positioning structure according to claim 7, characterized in that: The first limiting structure includes two first limiting grooves (21b) and a first limiting part (33). The two first limiting grooves (21b) are arranged opposite to each other on both sides of the rotating connection part (21) with the rotating shaft (6) as the center. The two first limiting parts (33) are arranged opposite to each other on both sides of the stop plate (3). The first limiting part (33) is movably disposed in the corresponding first limiting groove (21b).

9. A planar fan with a pitch positioning structure according to claim 8, characterized in that: The second limiting structure includes two second limiting grooves (21c) and a second limiting part (34). The two second limiting grooves (21c) are arranged opposite to each other on both sides of the rotating connection part (21) with the rotating shaft (6) as the center. The two second limiting parts (34) are arranged opposite to each other on both sides of the stop plate (3). The second limiting part (34) is movably disposed in the corresponding second limiting groove (21c). The first limiting part (33) is arranged on both sides of the stop plate (3) along the first direction, and the second limiting part (34) is arranged on both sides of the stop plate (3) along the second direction perpendicular to the first direction.

10. A planar fan with a pitch positioning structure according to claim 1, characterized in that: The positioning post (5) includes a clamping part (51) and a plugging part (52). The plugging part (52) is inserted into the spring (4) so ​​that one end of the spring (4) abuts against the clamping part (51), and the end of the clamping part (51) facing the positioning groove (3a) is spherical.

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