Supporting frame and electric fan

Abstract

The utility model relates to a supporting frame and an electric fan. The supporting frame comprises a supporting leg, a supporting rod and a supporting rod, comprising a main body and a supporting leg groove, and the axis of the supporting leg groove is perpendicular to the main body. A plurality of inner teeth are arranged on the inner circumferential face of the supporting foot groove, and a coaxial installation column is arranged on the axis in a protruding mode. Comprising a rotating ring, and a pair of outer teeth are arranged on the outer peripheral face of the rotating ring in a protruding mode; the mounting column is sleeved with the rotating ring, and the outer teeth are meshed and matched with the inner teeth; one end of the supporting leg is obliquely placed on the horizontal plane, and the other end is buckled with the rotating ring. The supporting frame and the supporting legs are rotatably installed in the supporting leg grooves through the rotating rings, meanwhile, the outer teeth of the rotating rings are meshed with the inner teeth of the supporting leg grooves, and the outer teeth of the rotating rings and the inner teeth of the supporting leg grooves are connected in a gear meshing transmission mode, on one hand, certain friction force can be provided, and the opening angle of the supporting legs is not prone to being changed by external force; on the other hand, the opening angle of the supporting legs can be controllably adjusted in a tooth number calculation mode.

Description

Technical Field

[0001] This utility model relates to the field of support equipment, and in particular to a support frame and an electric fan. Background Technology

[0002] Household appliances often use support frames to adjust their installation height, such as standing fans, with tripods being the most common. Commercially available tripods typically consist of a base and three legs. The base has three connecting slots on its perimeter, into which the legs rotatably insert. However, when used on non-level surfaces, the opening angle of each leg needs to be adjusted according to the terrain. Commercially available tripods usually connect to these slots via hinges, and the opening angle is adjusted using locking mechanisms. These mechanisms typically have only two or three locking points, limiting the adjustable angle and failing to meet the needs of complex terrain, causing inconvenience for users. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide a support frame and an electric fan.

[0004] A support frame includes: a support leg; a support base including a main body and a support groove; the main body axis is perpendicular to a horizontal plane, and an annular support groove perpendicular to the main body axis is formed on the outer circumferential surface; the inner circumferential surface of the support groove is provided with a plurality of internal teeth, and a mounting post coaxially thereon protrudes from the support groove axis; a connecting assembly including a rotating ring, the outer circumferential surface of the rotating ring being provided with at least one pair of external teeth; the rotating ring is sleeved on the mounting post, and the external teeth mesh with the internal teeth; one end of the support leg is placed obliquely on a horizontal plane, and the other end is snapped into the rotating ring and is capable of rotating around the mounting post.

[0005] The support frame described in this utility model has a support foot that is rotatably installed into a support foot groove via a rotating ring. At the same time, the outer teeth of the rotating ring mesh with the inner teeth of the support foot groove and are connected by gear meshing transmission. On the one hand, it can provide a certain friction force so that the opening angle of the support foot is not easily changed by external force. On the other hand, the opening angle of the support foot can be controlled and adjusted by calculating the number of teeth.

[0006] Furthermore, the support leg includes a support tube and a support tube plug; the support tube plug includes an insertion part and a connecting part, the insertion part is inserted into one end of the support tube near the rotating ring, and the connecting part has a first protrusion extending along the axis of the mounting column towards the support seat on one side near the support groove, and the rotating ring has a corresponding first locking part, the first protrusion is inserted into the first locking part to form the snap-fit ​​connection.

[0007] The above technical solution connects the support foot and the rotating ring through the cooperation of the first protrusion and the first locking part.

[0008] Furthermore, the support tube has a connecting hole, and the insert part has a threaded hole, and the connecting hole and the threaded hole can communicate with each other.

[0009] The above technical solution uses screws, connecting holes, and threaded holes to connect and fix the support tube and the tube plug.

[0010] Furthermore, the connecting assembly also includes a locking screw and a locking nut, and the mounting post has a second through hole that penetrates the main body. The locking screw passes through the second through hole and is threadedly connected to the locking nut.

[0011] The above technical solution uses locking screws and locking nuts to tighten the connection between the support foot and the support foot groove, making the connection more stable.

[0012] Furthermore, the connecting assembly also includes a locking member, the locking member having a second protrusion extending along the axis of the mounting post at one end near the mounting post, the mounting post having a second locking portion at one end away from the main body, the second protrusion being inserted into the second locking portion, and the locking screw passing through the locking member and the second through hole in sequence and then threadedly connected to the locking nut.

[0013] Through the above technical solution, the second protrusion and the second locking part are fixed together, and the locking screw and the locking part are limited by friction to prevent the fastening screw from loosening when the support foot and the rotating ring rotate together.

[0014] Furthermore, the connecting assembly also includes a washer, which is in contact with the end face of the locking member away from the second protrusion. The locking screw passes through the washer, the locking member and the second through hole in sequence and is threadedly connected to the locking nut.

[0015] The above technical solution increases the force-bearing area of ​​the locking screw when it is tightened, which can effectively disperse the pressure of the locking screw on the locking component and avoid excessive local pressure that could cause deformation or damage to the locking component.

[0016] Furthermore, the rotating ring is a flexible plastic component.

[0017] Through the above technical solution, the rotating ring is made of elastic plastic, which undergoes elastic deformation when rotating, reducing friction and improving the service life of the rotating ring.

[0018] Furthermore, the support foot also includes a rubber foot sleeve, which is fitted onto the end of the support foot tube away from the foot tube plug.

[0019] The above technical solution avoids direct contact between the support tube and the horizontal surface, protecting the support tube and improving its service life.

[0020] An electric fan includes: the support frame described above, a connecting rod, and a fan body, wherein the fan body is mounted on one end of the connecting rod, and the end of the connecting rod away from the fan body is inserted into the body of the support base.

[0021] Furthermore, the support base also includes a locking assembly for fixing the connecting rod. The locking assembly includes a knob bolt and a tightening nut. The knob bolt passes through the support base, is threadedly connected to the tightening nut, and abuts against the connecting rod.

[0022] The above technical solution allows for the fixing or changing of the relative position between the connecting rod and the connecting seat by tightening or loosening the knob bolt. Attached Figure Description

[0023] Figure 1 A schematic diagram of the spatial structure of the support frame provided by this utility model;

[0024] Figure 2 for Figure 1 Enlarged axonometric section view along the AA direction;

[0025] Figure 3 for Figure 1 Enlarged section view along the middle BB direction;

[0026] Figure 4 A schematic diagram of the spatial structure of the support foot provided by this utility model;

[0027] Figure 5 An exploded view of the support foot provided by this utility model;

[0028] Figure 6 A schematic diagram of the spatial structure of the support base provided by this utility model;

[0029] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0030] Figure 8 An exploded view of the support structure provided by this utility model;

[0031] Figure 9 for Figure 8 Enlarged view of point A in the middle;

[0032] Figure 10 for Figure 8 Enlarged view of point B in the middle.

[0033] In the diagram, 1. Support leg; 11. Support leg tube; 111. Connecting hole; 12. Leg tube plug; 121. Insertion part; 1211. Threaded hole; 122. Connecting part; 1220. First through hole; 1221. First protrusion; 13. Rubber foot sleeve; 2. Support leg base; 21. Main body; 211. First connecting groove; 212. Second connecting groove; 213. Through hole; 22. Support leg groove; 221. Internal tooth; 222. Mounting post; 2221. First through hole; 2222. Second locking part; 23. Seat cover ; 231, First connecting block; 232, Second connecting block; 2321, Vertical part; 2322, Horizontal part; 24, Locking assembly; 241, Knob bolt; 242, Tightening nut; 25, Limiting plate; 251, Guide part; 252, Limiting part; 3, Connecting assembly; 31, Rotating ring; 311, External tooth; 312, First locking part; 32, Locking screw; 33, Locking nut; 34, Locking piece; 341, Second protrusion; 35, Washer; 40, Connecting screw; 50, Connecting rod. Detailed Implementation

[0034] To address the limitations of existing adjustable support angles in support frames, the inventor provides a support frame where the support legs and leg grooves are connected by gear meshing. The opening angle of the support legs is precisely controlled by the meshing of the outer teeth of the rotating ring with the inner teeth of the leg grooves. Specifically, the number of adjustable angle settings for the support legs is linked to the number of teeth on the meshing gears. This allows the adjustable support angle of the support legs to meet the needs of most complex terrains. Simultaneously, the friction between the outer teeth of the rotating ring and the inner teeth of the leg grooves helps to limit the movement of the support legs, preventing changes in the opening angle when subjected to external forces. The following are some specific embodiments of the support frame of this invention:

[0035] Please refer to Figures 1 to 10 , Figure 1 A schematic diagram of the spatial structure of the support frame provided by this utility model; Figure 2 for Figure 1 Enlarged axonometric section view along the AA direction; Figure 3 for Figure 1 Enlarged section view along the middle BB direction; Figure 4 A schematic diagram of the spatial structure of the support foot provided by this utility model; Figure 5 An exploded view of the support foot provided by this utility model; Figure 6 A schematic diagram of the spatial structure of the support base provided by this utility model; Figure 7 for Figure 5 Enlarged view of point C in the middle; Figure 8 An exploded view of the support structure provided by this utility model; Figure 9 for Figure 7 Enlarged view of point A in the middle; Figure 10 for Figure 7 Enlarged view of point B in the middle.

[0036] This utility model provides a support frame, including a plurality of support legs 1, support bases 2, and connecting components 3. One end of each support leg 1 is placed at an angle on a horizontal surface such as a table or floor, and the other end is rotatably mounted to the support base 2 along an axis parallel to the horizontal plane via the connecting components 3. The connecting components 3 are installed between the support legs 1 and the support base 2. Projected perpendicular to the horizontal plane, each support leg 1 is evenly distributed along the outer circumference of the support base 2. Preferably, projected along the rotation axis of the support leg 1, the angle between the support leg 1 and the horizontal plane is between 30° and 45°, ensuring the support frame is placed stably. In this embodiment, the number of support legs 1 is three.

[0037] The support leg 1 includes a support tube 11, a tube plug 12, and a rubber foot sleeve 13.

[0038] Please refer to Figure 1 Figure 4 and Figure 5 The support tube 11 is a hollow frame with an opening at the top. A connecting hole 111 for inserting a screw is provided on the side of the support tube 11 near the opening. The support tube plug 12 includes an insertion part 121 and a connecting part 122. The insertion part 121 has a threaded hole 1211 that engages with the screw thread. The insertion part 121 is inserted into one end of the opening of the support tube 11, where the threaded hole 1211 and the connecting hole 111 are connected, and the connecting part 122 protrudes outside the support tube 11. The connecting part 122 is a semi-enclosed structure with an opening on the side near the support leg 2. The connecting part 122 is fitted onto the outer peripheral surface of the support leg 2 to form an installation space. A first through hole 1220 is formed on the plate surface of the connecting part 122 away from the support leg 2. The first through hole 1220 has two protruding first protrusions 1221 on its radial sides, extending towards the installation space along the rotation axis of the support leg 1. The two first protrusions 1221 are arranged circumferentially around the outside of the first through hole 1220 and opposite to each other. The rubber foot sleeve 13 is fitted onto the end of the support leg tube 11 away from the foot tube plug 12, which can reduce damage to the support leg tube 11, giving the support leg tube 11 a longer service life, and also providing excellent shock absorption stability. During assembly, the connecting screw 40 is inserted from the connecting hole 111 and threaded into the threaded hole 1211 to connect and fix the support leg tube 11 and the foot tube plug 12.

[0039] The support base 2 includes a main body 21, a support groove 22, a cover 23, and a locking component 24.

[0040] Please refer to Figure 6 and Figure 7The main body 21 is a hollow annular cylinder with its axis perpendicular to the horizontal plane. The support groove 22 is disposed on the outer surface of the main body 21. Projected along the axial direction of the main body 21, the support groove 22 is evenly distributed around the circumference of the main body 21, and its number corresponds to the number of support feet 1. In this embodiment, the support groove 22 is a circular groove formed on the outer surface of the main body 21, and its axis coincides with the rotation axis of the support foot 1. A plurality of internal teeth 221 are formed on the inner circumferential surface of the support groove 22, and a mounting post 222 protrudes from the axis of the support groove 22, coaxial with it and extending into the installation space. Projected along the axial direction of the mounting post 222, a second through hole 2221 penetrating the main body 21 is formed on the mounting post 222. After the support foot 1 is installed on the support base 2, the axis of the second through hole 2221 coincides with the axis of the first through hole 1220. Two second locking portions 2222 are provided on the end face of the mounting post 222 away from the main body 21. The second locking portions 2222 are located on both sides of the mounting post 222 in the radial direction. The support leg 1 is rotatably mounted in the support leg groove 22 through the connecting assembly 3 and can rotate around the mounting post 222.

[0041] Please refer to Figure 6 , Figure 8 and Figure 9 Projecting along the axis of the main body 21, the seat cover 23 covers the upper end of the main body 21. In this embodiment, the seat cover 23 and the main body 21 are connected by a snap-fit ​​connection. Specifically, a first connecting block 231 protrudes from the side of the seat cover 23 near the main body 21, and the extending direction of the first connecting block 231 is parallel to the axial direction of the main body 21. A first connecting groove 211 is formed on the upper end surface of the main body 21, which mates with the first connecting block 231. The first connecting block 231 is inserted into the first connecting groove 211, thereby connecting the seat cover 23 and the main body 21. Preferably, the seat cover 23 further protrudes from the side of the main body 21 with a second connecting block 232. The second connecting block 232 includes a vertical portion 2321 and a horizontal portion 2322. The vertical portion 2321 extends parallel to the axis of the main body 21, and the horizontal portion 2322 protrudes from the side of the vertical portion 2321 away from the seat cover 23, with its extension direction perpendicular to the axis of the main body 21. A second connecting groove 212 is formed on the side of the main body 21 to cooperate with the horizontal portion 2322. When the seat cover 23 is closed onto the main body 21, the horizontal portion 2322 is inserted into the second connecting groove 212, thereby preventing the seat cover 23 from detaching from the main body 21. In other embodiments, the seat cover 23 and the main body 21 can be integrally molded, thereby reducing the complexity of the manufacturing process and reducing the processing difficulty.

[0042] The support base 2 is connected to the mounting device via a connecting rod 50. Specifically, the main body 21 has a through hole 213 with its axis perpendicular to the horizontal plane. The mounting device is installed at one end of the connecting rod 50, and the end of the connecting rod 50 away from the mounting device is inserted into the through hole 213.

[0043] The locking assembly 24 is used to fix the position of the connecting rod 50. In this embodiment, the locking assembly 24 includes a knob bolt 241 and a tightening nut 242. The knob bolt 241 can be inserted radially into the body 21. After being threadedly connected with the tightening nut 242, its end abuts against the connecting rod 50. In use, rotating the knob bolt 241 releases the pressure of the knob bolt 241 on the connecting rod 50, thereby adjusting the installation height of the connecting rod 50. Similarly, when it is necessary to fix the connecting rod 50, the knob bolt 241 is rotated in the opposite direction to make it abut against the connecting rod 50 and fix it.

[0044] Preferably, the support leg 2 further includes a limiting baffle 25, which is disposed above the support leg groove 22 to guide and limit the support leg 1. The limiting baffle 25 includes a guide portion 251 and two limiting portions 252. The guide portion 251 is an arc-shaped baffle corresponding to the outer contour shape of the connecting portion 122, and the center of the guide portion 251 is located on the axis of rotation of the support leg 1. The two limiting portions 252 are respectively connected to both ends of the guide portion 251 and extend in a direction away from the support leg 1. When the support leg 1 rotates around its axis of rotation, the guide portion 251 cooperates with the connecting portion 122 to provide guidance. The two limiting parts 252 limit the rotation of the support leg 1. When the connecting part 122 rotates to contact the limiting part 252 on one side, the support leg 1 rotates to the extreme position on that side; when the connecting part 122 rotates to contact the limiting part 252 on the other side, the support leg 1 rotates to the extreme position on the other side.

[0045] Please refer to Figure 2 , Figure 3 , Figure 8 and Figure 10The connecting assembly 3 includes a rotating ring 31, a locking screw 32, and a locking nut 33. The rotating ring 31 is disposed within the support foot groove 22 and is coaxial with the support foot groove 22. A pair of external teeth 311 protrude from the outer circumference of the rotating ring 31. Preferably, the two external teeth 311 are respectively disposed on opposite sides of the rotating ring 31 in the radial direction, and the external teeth 311 can mesh with the internal teeth 221. The connecting part 122 is connected to the rotating ring 31 by a snap-fit ​​engagement, so that the support foot 1 can be rotatably installed into the support foot groove 22. Specifically, the rotating ring 31 has a first locking part 312 corresponding to the first protrusion 1221, and the first protrusion 1221 is inserted into the first locking part 312 to connect the rotating ring 31 and the support foot 1. The rotating ring 31 has a third through hole (not shown in the figure) corresponding to the mounting post 222, and the mounting post 222 passes through the third through hole and extends away from the main body 21. During assembly, the rotating ring 31 is installed into the mounting space through the cooperation of the first protrusion 1221 and the first locking part 312, and then sleeved on the mounting post 222, meshing with the internal gear 221 of the support groove 22. The mounting post 222 passes through the third through hole and is located in the mounting space. The locking screw 32 passes through the first through hole 1220 and the second through hole 2221 in sequence, and is threadedly connected to the locking nut 33 for locking. The annular surface of the locking nut 33 abuts against the inner circumferential surface of the second through hole 2221, making the connection between the support foot 1 and the support groove 22 more stable. Preferably, the rotating ring 31 is an elastic plastic part, made of elastic plastics such as ABS or PP, so that the rotating ring 31 can reduce the friction between the external gear 311 and the internal gear 221 through elastic deformation when rotating, thereby extending the service life of the rotating ring 31.

[0046] Preferably, the connecting assembly 3 further includes a locking member 34, which is a rubber pad disposed between the mounting post 222 and the locking screw 32, and its axis is on the same straight line as the axis of the second through hole 2221. Specifically, the locking member 34 has a second protrusion 341 protruding from one end near the mounting post 222. The extension direction of the second protrusion 341 is parallel to the axis of rotation of the support leg 1. The second protrusion 341 is inserted into the second locking portion 2222 to connect the locking member 34 and the mounting post 222, and the end of the locking member 34 away from the second protrusion 341 passes through the first through hole 1220 and protrudes outside the connecting portion 122. The locking screw 32 first passes through the locking member 34, then through the second through hole 2221, and is locked by the locking nut 33. The locking screw 32 is limited by the friction between the locking member 34 and the locking screw 32, preventing the locking screw 32 from being loosened when the support leg 1 rotates.

[0047] Preferably, the connecting assembly 3 further includes a washer 35, which is disposed between the locking member 34 and the locking screw 32. The washer 35 abuts against the end face of the locking member 34 away from the second protrusion 341. The locking screw 32 passes sequentially through the washer 35, the locking member 34, and the second through hole 2221 before being locked by the locking nut 33. The washer 35 increases the force-bearing area of ​​the locking screw 32 during locking, effectively dispersing the pressure of the locking screw 32 on the locking member 34 and preventing excessive local pressure from causing deformation or damage to the locking member 34.

[0048] The working principle of the support frame provided by this utility model is as follows: When the support leg 1 is open, the external teeth 311 mesh with the internal teeth 221, and the friction between them allows the support leg 1 to maintain its current opening angle even when subjected to a certain amount of force. When the user needs to change the opening angle of the support leg 1, they forcefully pry the support leg 1, causing the external teeth 311 to undergo elastic deformation, sliding out from one set of internal teeth 221 and engaging with the next set of internal teeth 221. The use of elastic plastics such as ABS reduces the friction between the external teeth 311 and the internal teeth 221 through elastic deformation when the support leg 1 rotates, thereby extending the service life of the rotating ring 31.

[0049] This utility model also provides an electric fan, which includes the support frame, connecting rod 50 and fan body as described above. The fan body is installed at one end of the connecting rod 50, and the end of the connecting rod 50 away from the fan body is inserted into the support base 2.

[0050] This utility model provides a support frame and an electric fan. The support legs of the support frame are rotatably mounted on the support base through a connecting component in the form of gear meshing. This allows the support legs to be precisely controllable when changing their opening angle. At the same time, by increasing the surface roughness of the gear contact surface, when the support legs are mounted on the equipment at a certain opening angle, the opening angle is not easily changed by external forces, thus ensuring the stable operation of the equipment.

[0051] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and this utility model also intends to include these modifications and variations.

Claims

1. A support frame, characterized in that, include: Support feet; The support includes a main body and a support groove; the axis of the main body is perpendicular to the horizontal plane, and an annular support groove perpendicular to the axis of the main body is formed on the outer circumferential surface; the inner circumferential surface of the support groove is provided with a plurality of internal teeth, and a mounting post coaxial with the axis of the support groove protrudes from the axis of the support groove. The connecting assembly includes a rotating ring, on the outer circumferential surface of which at least one pair of external teeth protrude; the rotating ring is sleeved on the mounting post, and the external teeth mesh with the internal teeth; one end of the support leg is placed at an angle on a horizontal surface, and the other end is snapped into the rotating ring and is capable of rotating around the mounting post.

2. The support frame according to claim 1, characterized in that: The support leg includes a support tube and a support tube plug; the support tube plug includes an insertion part and a connecting part, the insertion part is inserted into one end of the support tube near the rotating ring, and the connecting part has a first protrusion extending along the axis of the mounting column towards the support seat on one side near the support groove. The rotating ring has a corresponding first locking part, and the first protrusion is inserted into the first locking part to form the snap-fit ​​connection.

3. The support frame according to claim 2, characterized in that: The support tube has a connecting hole, and the insert part has a threaded hole, and the connecting hole and the threaded hole can communicate with each other.

4. The support frame according to claim 2, characterized in that: The connecting assembly also includes a locking screw and a locking nut. The mounting post has a second through hole that penetrates the main body. The locking screw passes through the second through hole and is threadedly connected to the locking nut.

5. The support frame according to claim 4, characterized in that: The connecting assembly further includes a locking member, wherein the locking member has a second protrusion extending along the axis of the mounting post at one end near the mounting post, and a second locking portion is provided at the end of the mounting post away from the main body, the second protrusion is inserted into the second locking portion, and the locking screw passes through the locking member and the second through hole in sequence and is threadedly connected to the locking nut.

6. The support frame according to claim 5, characterized in that: The connecting assembly also includes a washer, which is in contact with the end face of the locking member away from the second protrusion. The locking screw passes through the washer, the locking member and the second through hole in sequence and is threadedly connected to the locking nut.

7. The support frame according to claim 1, characterized in that: The rotating ring is made of elastic plastic.

8. The support frame according to claim 2, characterized in that: The support leg also includes a rubber foot sleeve, which is fitted onto the end of the support leg tube away from the foot tube plug.

9. An electric fan, characterized in that, include: The support frame, connecting rod, and fan body according to any one of claims 1-8, wherein the fan body is mounted on one end of the connecting rod, and the end of the connecting rod away from the fan body is inserted into the body of the support base.

10. The electric fan according to claim 9, characterized in that: The support base also includes a locking assembly for the connecting rod. The locking assembly includes a knob bolt and a tightening nut. The knob bolt passes through the support base, is threadedly connected to the tightening nut, and abuts against the connecting rod.

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