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 rotating assembly and a connecting seat, wherein clamping lugs capable of stretching out and drawing back inside and outside the supporting leg are arranged on the two opposite side faces of the supporting leg in a protruding mode, the rotating assembly is provided with a rotating shaft extending in the horizontal direction, and the connecting seat is provided with a second through hole with the axis extending in the horizontal direction. The supporting leg is installed on the connecting base through the rotating assembly and can rotate around the rotating shaft, and when the supporting leg rotates to a certain angle, the clamping protruding block penetrates through the second through hole and is arranged outside the connecting base in a protruding mode. According to the supporting frame, the supporting legs are limited through the cooperation of the telescopic clamping protruding blocks on the supporting legs and the through holes in the connecting bases, and the supporting frame has the advantages that the supporting legs can keep a stable opening angle and are not prone to being changed due to external force.

Description

Technical Field

[0001] The utility model relates to the technical field of supporting equipment, in particular to a supporting frame and an electric fan. Background Art

[0002] Currently, existing household appliances often utilize a support frame to facilitate height adjustment of the supported equipment, with tripods being the most common. Tripods on the market typically include a base and three supporting legs, with three supporting leg connection slots disposed around the base, into which the supporting legs are rotatably inserted. However, when these supports are subjected to external forces during use, the supporting legs can easily rotate, changing their contact angle with the ground, thereby affecting the operating state of the supported equipment. For example, when photographing, shaking of the support frame can affect the quality of the shot, causing significant inconvenience to the user. Utility Model Content

[0003] Based on this, the purpose of the present invention is to provide a support frame and an electric fan.

[0004] A support frame, comprising:

[0005] A supporting foot, wherein two opposite side surfaces of the supporting foot are provided with positioning protrusions that can be extended and retracted in and out of the supporting foot, and the extending directions of the positioning protrusions are respectively perpendicular to the two side surfaces of the supporting foot;

[0006] A rotating assembly is provided with a rotating shaft extending in a horizontal direction, wherein the axis direction of the rotating shaft is parallel to the extending direction of the locking protrusion and is not on the same straight line;

[0007] The connecting seat is provided with a second through hole whose axis extends in the horizontal direction; one end of the supporting foot is placed obliquely on a horizontal plane, and the other end is installed on the connecting seat through the rotating assembly and can rotate around the rotating axis; when the supporting foot is opened to a certain angle, the locking protrusion can pass through the second through hole and protrude outside the connecting seat.

[0008] The support frame described in the present invention limits the support legs by cooperating with the retractable positioning protrusions on the support legs and the through holes on the connecting seat, so that the support legs can maintain a stable opening angle and are not easily changed by external forces.

[0009] Furthermore, the supporting leg includes a supporting leg tube and a U-shaped spring; the locking protrusions are protruding from both ends of the U-shaped spring, and two first through holes are opened on the left and right sides of the supporting leg tube; the U-shaped spring is locked in the upper end of the supporting leg tube, and the two locking protrusions pass through the corresponding first through holes and protrude outside the supporting leg tube.

[0010] Through the above technical solution, the locking protrusions are set at both ends of the U-shaped spring that can be extended inward and outward. When working, the locking protrusions protrude from the second through hole to limit the position. When the supporting legs need to be retracted, the locking protrusions can be released by simply squeezing the locking protrusions inward, which is convenient and quick.

[0011] Furthermore, the connecting seat includes a main body and a mounting groove; the number of the mounting grooves corresponds to the number of the supporting feet, including a top plate and two side plates, one side of the top plate is connected to the main body and is inclined relative to the horizontal plane, the two side plates are connected on both sides of the top plate, and the side plates on the same side are connected between the top plate and the main body, and are enclosed with the top plate to form a connecting space, the supporting feet are installed in the connecting space through a rotating assembly, and the extension directions of the two locking protrusions are respectively perpendicular to the two side plates; the second through hole is opened on the two side plates.

[0012] Through the above technical solution, the supporting legs are installed in the connection space formed by the top plate and the two side plates, and the top plate and the two side plates limit the supporting legs from three directions.

[0013] Furthermore, two or more second through holes are respectively formed on the two side plates, and the centers of the second through holes are arranged on an arc with the axis of the rotating shaft as the center and the distance from the center of the locking protrusion to the axis of the rotating shaft as the radius.

[0014] Through the above technical solution, as the supporting legs are opened, the locking protrusions can pass through the second through holes respectively to limit the position, so that the supporting legs can maintain more than two stable opening angles.

[0015] Furthermore, the rotating assembly includes a leg tube connector and two rotating shaft sleeves; one end of the leg tube connector is connected to the supporting leg tube, and the other end is provided with a rotating shaft, the two rotating shaft sleeves are fixed in the connecting space and respectively close to the two side plates, and the two ends of the rotating shaft are respectively inserted in the two rotating shaft sleeves.

[0016] Through the above technical solution, the supporting foot is installed in the connection space through the cooperation between the supporting foot and the leg tube connector, and the leg tube connector and the rotating shaft sleeve, and the supporting foot can rotate around the rotating shaft.

[0017] Furthermore, a through hole is formed at one end of the support leg tube close to the leg tube connector, and a first threaded hole is formed at one end of the leg tube connector connected to the support leg tube, and the first threaded hole is connected to the through hole for screw fixation.

[0018] Through the above technical solution, the screw cooperates with the threads of the first threaded hole and the through hole to connect and fix the support leg tube and the leg tube connector.

[0019] Furthermore, each rotating shaft sleeve is provided with a second threaded hole on both sides of the radial direction, with the axis extending in the vertical direction. Four connecting columns are protruding in the connecting space. One end of the connecting column is fixed on the top plate, and the other end is provided with a third threaded hole. The third threaded hole is connected to the second threaded hole for screw fixation.

[0020] Through the above technical solution, the two rotating shaft sleeves are fixedly installed in the connection space by means of the screws cooperating with the threads of the second threaded hole and the third threaded hole.

[0021] Furthermore, the supporting foot also includes a rubber foot sleeve, and the rubber foot sleeve is sleeved on the end of the supporting foot tube away from the connecting seat.

[0022] Through the above technical solution, the easily replaceable rubber foot covers are in contact with the horizontal surface, thereby enhancing the stability of the support frame and preventing wear of the support leg tubes.

[0023] An electric fan comprises the above-mentioned support frame, a connecting rod and a fan body, wherein the fan body is mounted on one end of the connecting rod, and an end of the connecting rod away from the fan body is inserted into the connecting seat.

[0024] Furthermore, the connecting seat also includes a locking piece; the locking piece includes a knob bolt and a locking nut, the knob bolt passes through the connecting seat in a horizontal direction, and abuts against the connecting rod after being threadedly connected with the locking nut.

[0025] With the above technical solution, the relative position of the connecting rod and the connecting seat is fixed or changed by tightening or loosening the knob bolt, thereby adjusting the installation height of the fan body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the three-dimensional structure of the support frame provided in Example 1 of the present utility model;

[0027] Figure 2 A front view of the support frame provided in the first embodiment of the present invention projected in the vertical direction;

[0028] Figure 3 for Figure 1 A magnified partial cross-section along the BB direction;

[0029] Figure 4 A schematic diagram of the three-dimensional structure of the support foot provided in the first embodiment of the present utility model;

[0030] Figure 5 This is an exploded schematic diagram of the structure of the support foot provided in Example 1 of the present utility model;

[0031] Figure 6A schematic diagram of the three-dimensional structure of the connecting base provided in the first embodiment of the present utility model;

[0032] Figure 7 This is a front view of the connecting base provided in the first embodiment of the present invention projected along the vertical direction;

[0033] Figure 8 A schematic diagram of the three-dimensional structure of the rotating assembly provided in the first embodiment of the present utility model;

[0034] Figure 9 This is an exploded schematic diagram of the structure of the rotating assembly provided in the first embodiment of the present invention;

[0035] Figure 10 This is a schematic diagram of the three-dimensional structure of the connecting base provided in the second embodiment of the present utility model.

[0036] In the figure, 1. supporting foot; 11. supporting foot tube; 111. through hole; 112. first through hole; 12. U-shaped spring; 121. straight portion; 122. curved portion; 123. positioning protrusion; 13. rubber foot sleeve; 2. connecting seat; 21. main body; 211. mounting through hole; 22. mounting groove; 221. top plate; 222. side plate; 2221. second through hole; 223. connecting space; 224. mounting column; 2241. third threaded hole; 23. locking piece; 231. knob bolt; 232. locking nut; 3. rotating assembly; 31. foot tube connector; 311. rotating shaft; 312. first threaded hole; 32. rotating shaft sleeve; 321. second threaded hole; 41. first screw; 42. second screw; 50. connecting rod. DETAILED DESCRIPTION

[0037] While researching existing support frames on the market, the applicant discovered that the reason the support legs are prone to rotation when subjected to external forces is that, when the support legs are extended, they are secured solely by friction between the support legs and the rotation axis, lacking a position-limiting device. Based on this, the applicant proposed a support frame with protruding retaining bumps on the support legs and through-holes in the connecting base that mate with the retaining bumps. The engagement of the retaining bumps and the through-holes limits the support legs, improving the support frame's operational stability.

[0038] For better understanding and implementation, the present invention is described in detail below with reference to specific embodiments and accompanying drawings.

[0039] Example 1

[0040] Please refer to Figures 1 to 9 , Figure 1 A schematic diagram of the three-dimensional structure of the support frame provided in Example 1 of the present utility model; Figure 2 A front view of the support frame provided in the first embodiment of the present invention projected in the vertical direction; Figure 3 for Figure 1 A magnified partial cross-section along the BB direction; Figure 4 A schematic diagram of the three-dimensional structure of the support foot provided in the first embodiment of the present utility model; Figure 5 This is an exploded schematic diagram of the structure of the support foot provided in Example 1 of the present utility model; Figure 6 A schematic diagram of the three-dimensional structure of the connecting base provided in the first embodiment of the present utility model; Figure 7 This is a front view of the connecting base provided in the first embodiment of the present invention projected along the vertical direction; Figure 8 A schematic diagram of the three-dimensional structure of the rotating assembly provided in the first embodiment of the present utility model; Figure 9 This is an exploded schematic diagram of the structure of the rotating assembly provided in the first embodiment of the present invention;

[0041] The utility model provides a support frame, comprising a plurality of support legs 1, a connecting base 2, and a rotating assembly 3. The support legs 1 are tilted and placed on a horizontal surface such as a table or the ground, with their upper ends rotatably mounted on the connecting base 2 via the rotating assembly 3. Projected perpendicular to the horizontal plane, the support legs 1 are evenly arranged along the periphery of the connecting base 2, and the angles between the centerlines of the support legs 1 are equal. In this embodiment, there are three support legs 1, and the angles between the centerlines of the support legs 1 are 120°.

[0042] The support leg 1 includes a support leg tube 11 , a U-shaped spring 12 and a rubber foot cover 13 .

[0043] The support leg tube 11 is hollow inside and has an open frame at the upper end. A through hole 111 for inserting a screw is provided on the side surface of the upper end of the support leg tube 11 near the opening.

[0044] The U-shaped spring 12 includes two straight portions 121, a curved portion 122, and a locking protrusion 123. The two ends of the curved portion 122 are respectively connected to one end of the two straight portions 121. The locking protrusion 123 is protruding from the end of the two straight portions 121 away from the curved portion 122, and the locking protrusion 123 extends radially outward along the curved portion 122. The left and right side surfaces of the support leg tube 11 respectively define a first through hole 112. The U-shaped spring 12 is retractably secured within the upper end of the support leg tube 11. The two straight portions 121 respectively abut the left and right side surfaces of the support leg tube 11, allowing the two locking protrusions 123 to pass through the first through holes 112 and protrude outside the support leg tube 11.

[0045] The rubber foot cover 13 is sleeved on the end of the support leg tube 11 away from the through hole 111, and plays an anti-slip and shock-absorbing role, so that the support frame can stand firmly. At the same time, the rubber foot cover 13 can also prevent wear and scratches caused by direct contact between the bottom of the support leg tube 11 and the ground or other hard objects, thereby extending the service life of the support frame.

[0046] The connecting base 2 includes a main body 21, a mounting groove 22, and a locking member 23.

[0047] The main body 21 is a hollow cylinder with its axis perpendicular to the horizontal plane. The mounting groove 22 is connected to the outer circumferential surface of the main body 21. When projected along the axial direction of the main body 21, the mounting grooves 22 are evenly distributed along the circumferential direction of the main body 21, and their number corresponds to that of the support feet 1. The mounting groove 22 includes a top plate 221 and two side plates 222. The top plate 221 is inclined axially relative to the main body 21, with one end abutting against the outer circumferential surface of the main body 21 and the other end extending outward away from the main body 21. The two side plates 222 are connected to opposite sides of the top plate 221, and the side plates 222 on the same side are connected between the top plate 221 and the main body 21, enclosing a connection space 223 with the side of the top plate 221 facing the main body 21, and the overall cross-section is in an inverted "U" shape. The support feet 1 are installed into the connection space 223 through the rotating assembly 3, and the left and right sides of the support feet 1 are close to the two side plates 222, and the extending directions of the two clamping protrusions 123 are respectively perpendicular to the two side plates 222. The top plate 221 and the side plates 222 respectively surround the outer sides of three sides of the support feet 1, thereby limiting the support feet 1 from three directions.

[0048] In this embodiment, the rotating assembly 3 includes a foot tube connector 31 and two rotating shaft sleeves 32. The rotating shaft sleeves 32 are fixedly arranged in the connection space 223 and are respectively close to the two side plates 222, and their axis directions are perpendicular to the side plates 222. One end of the foot tube connector 31 is connected to the support foot tube 11, and the other end is provided with a cylindrical rotating shaft 311. The axis direction of the rotating shaft 311 is parallel to the axis direction of the rotating shaft sleeve 32, that is, the extending direction of the rotating shaft 311 is perpendicular to the left and right sides of the support foot tube 11. The two ends of the rotating shaft 311 are respectively inserted into the two rotating shaft sleeves 32, and the rotating shaft 311 can rotate relative to the rotating shaft sleeve 32.

[0049] Specifically, one end of the foot tube connector 31 away from the rotating shaft 311 is provided with a first threaded hole 312 that is threadedly engaged with a screw, and the first threaded hole 312 communicates with the through hole 111. Two ends in the radial direction of the rotating shaft sleeve 32 are provided with second threaded holes 321 for threaded connection with screws. The axis of the second threaded hole 321 extends in the vertical direction. Four connecting columns 224 protruding vertically into the connection space 223 are provided on the top plate 221. One end of the connecting column 224 is fixedly arranged on the top plate 221, and the other end is provided with a third threaded hole 2241, and the third threaded hole 2241 communicates with the second threaded hole 321.

[0050] During assembly, one end of the leg connector 31, which has a first threaded hole 312, is inserted into the open end of the support leg 11. A first screw 41 is inserted into the through-hole 111 and threadedly engages with the corresponding first threaded hole 312 to connect the support leg 11 and the leg connector 31. Furthermore, four second screws 42 are respectively inserted into the second threaded hole 321 and the third threaded hole 2241 and threadedly engage with each other to secure the shaft sleeve 32 within the connection space 223. Next, the two ends of the rotating shaft 311 are respectively inserted into the shaft sleeve 32, thereby allowing the support leg 1 to be rotatably mounted on the connecting base 2.

[0051] In other embodiments, the rotating shaft sleeve 32 can be fixed on the supporting foot 1, the rotating shaft 311 can be fixed in the connecting space 223, and the rotating shaft sleeve 32 is sleeved on both ends of the rotating shaft 311, which can also enable the supporting foot 1 to be rotatably installed on the connecting seat 2, but is not limited to this.

[0052] Furthermore, second through holes 2221 are provided on both side panels 222. As the support leg 1 opens, the locking protrusion 123 moves along the inner wall of the side panel 222 to the second through hole 2221. The locking protrusion 123 passes through the second through hole 2221 and protrudes outside the mounting groove 22, thereby limiting the support leg 1 so that the support leg 1 maintains a stable opening angle.

[0053] The connecting base 2 is connected to the carrying device via a vertically extending connecting rod 50. Specifically, the main body 21 defines a mounting hole 211, the axis of which is perpendicular to the horizontal plane. The carrying device is mounted on one end of the connecting rod 50, and the end of the connecting rod 50 away from the carrying device is inserted into the mounting hole 211.

[0054] The locking member 23 is used to fix the position of the connecting rod 50. In this embodiment, the locking member 23 includes a knob bolt 231 and a lock nut 232. The knob bolt 231 can pass through the main body 21 in a horizontal direction and abut against the connecting rod 50 after being threadedly connected with the lock nut 232. During use, the knob bolt 231 is rotated to release the pressure of the knob bolt 231 on the connecting rod 50, thereby adjusting the installation height of the connecting rod 50. Similarly, when the connecting rod 50 needs to be fixed, the knob bolt 231 is rotated in the opposite direction to abut and fix it against the connecting rod 50.

[0055] In this embodiment, the support legs 1 are made of metal to improve wind and earthquake resistance. In other embodiments, the support legs 1 can be made of hardwood or other hard materials, and the material can be selected according to actual needs.

[0056] During assembly, the U-shaped spring 12 is clamped inside the support leg tube 11, and the locking protrusion 123 passes through the first through hole 112. The leg tube connector 31 is inserted into the open end of the support leg tube 11 and fixed by the first screw 41. The rubber foot sleeve 13 is sleeved on the end of the support leg tube 11 away from the leg tube connector 31; the rotating shaft sleeve 32 is connected and fixed in the connecting space 223 by the second screw 42, and the two ends of the rotating shaft 311 are inserted in the rotating shaft sleeve 32 to realize the rotational connection between the supporting foot 1 and the connecting seat 2.

[0057] Example 2

[0058] Please refer to Figure 10 , Figure 10 This is a schematic diagram of the three-dimensional structure of the connecting base 2 provided in the second embodiment of the present utility model.

[0059] The support frame provided in this embodiment has a substantially identical structure to the support frame provided in the first embodiment, with the following differences:

[0060] Two second through holes 2221 are defined on the same side panel 222. The centers of the two second through holes 2221 lie on an arc centered on the axis of the rotation shaft 311 and with a radius equal to the distance between the center of the locking projection 123 and the axis of the rotation shaft 311. The two second through holes 2221 are connected by a connecting groove 2222, the width of which is smaller than the diameter of the second through holes 2221. The end of the locking projection 123 away from the linear portion 121 is hemispherical. As the supporting foot 1 opens, the locking protrusion 123 can pass through the two second through holes 2221 respectively and protrude outside the mounting groove 22, thereby limiting the supporting foot 1 so that the supporting foot 1 has two stable opening angles. When the opening angle needs to be changed, the supporting foot 1 is directly pulled by hand, and the hemispherical end of the locking protrusion 123 slides into the second connecting groove 2222 and moves along the trajectory of the connecting groove 2222 to the other second through hole 2221 to re-form the limit, so that the contact angle of the supporting foot 1 with the horizontal plane can be changed according to usage needs.

[0061] Preferably, more than three second through holes 2221 are provided on the same-side side panel 222, and the centers of the second through holes 2221 are arranged on an arc with the axis of the rotating shaft 311 as the center and the distance from the center of the locking protrusion 123 to the axis of the rotating shaft 311 as the radius, so that the supporting foot 1 has more than three stable opening angles.

[0062] The present invention also provides an electric fan, which includes the above-mentioned support frame, a connecting rod 50 and a fan body, wherein 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 connecting seat 2.

[0063] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous modifications and improvements without departing from the concept of the present invention, and the present invention is intended to encompass such modifications and variations.

Claims

1. A support frame, characterized in that: include: A supporting foot (1), wherein two opposite side surfaces of the supporting foot (1) are protrudingly provided with positioning protrusions (123) capable of extending inward and outward of the supporting foot (1), and the extending directions of the positioning protrusions (123) are respectively perpendicular to the two side surfaces of the supporting foot (1); A rotating assembly (3) is provided with a rotating shaft (311) extending in a horizontal direction, wherein the axial direction of the rotating shaft (311) is parallel to the extending direction of the locking protrusion (123) and is not on the same straight line; The connecting seat (2) is provided with a second through hole (2221) whose axis extends in a horizontal direction; one end of the supporting foot (1) is placed obliquely on a horizontal plane, and the other end is mounted on the connecting seat (2) through the rotating assembly (3) and is capable of rotating around the rotating axis (311); when the supporting foot (1) is opened to a certain angle, the locking protrusion (123) can pass through the second through hole (2221) and protrude outside the connecting seat (2).

2. The support frame according to claim 1, wherein: The supporting leg (1) comprises a supporting leg tube (11) and a U-shaped spring (12); the locking protrusions (123) are protruding from both ends of the U-shaped spring (12); two first through holes (112) are provided on the left and right sides of the supporting leg tube (11); the U-shaped spring (12) is locked inside the upper end of the supporting leg tube (11), and the two locking protrusions (123) pass through the corresponding first through holes (112) and protrude outside the supporting leg tube (11).

3. The support frame according to claim 2, wherein: The connecting seat (2) comprises a main body (21) and a mounting groove (22); the number of the mounting grooves (22) corresponds to the number of the supporting legs (1), and comprises a top plate (221) and two side plates (222); one side of the top plate (221) is connected to the main body (21) and is tilted relative to a horizontal plane; the two side plates (222) are connected to both sides of the top plate (221); and the side plates (222) on the same side are connected between the top plate (221) and the main body (21), and enclosed with the top plate (221) to form a connecting space (223); the supporting legs (1) are installed in the connecting space (223) through a rotating assembly (3), and the extension directions of the two locking protrusions (123) are respectively perpendicular to the two side plates (222); the second through hole (2221) is opened on the two side plates (222).

4. The support frame according to claim 3, characterized in that: Two or more second through holes (2221) are respectively provided on the two side plates (222), and the centers of the second through holes (2221) are arranged on an arc having the axis of the rotating shaft (311) as the center and the distance between the center of the locking protrusion (123) and the axis of the rotating shaft (311) as the radius.

5. The support frame according to claim 3, characterized in that: The rotating assembly (3) comprises a leg tube connector (31) and two rotating shaft sleeves (32); one end of the leg tube connector (31) is connected to the supporting leg tube (11), and the other end is provided with a rotating shaft (311); the two rotating shaft sleeves (32) are fixed in the connecting space (223) and respectively close to the two side plates (222); the two ends of the rotating shaft (311) are respectively inserted into the two rotating shaft sleeves (32).

6. The support frame according to claim 5, characterized in that: A through hole (111) is provided at one end of the support leg tube (11) close to the leg tube connector (31), and a first threaded hole (312) is provided at one end of the leg tube connector (31) connected to the support leg tube (11). The first threaded hole (312) is communicated with the through hole (111) for screw connection and fixation.

7. The support frame according to claim 5, characterized in that: A second threaded hole (321) with an axis extending in a vertical direction is respectively provided on both radial sides of each rotating shaft sleeve (32); four connecting columns (224) extending in a vertical direction toward the connecting space (223) are protruding from the top plate (221); one end of the connecting column (224) is fixed on the top plate (221); and the other end is provided with a third threaded hole (2241); the third threaded hole (2241) is communicated with the second threaded hole (321) for screw fixation.

8. The support frame according to claim 2, wherein: The supporting foot (1) further comprises a rubber foot sleeve (13), and the rubber foot sleeve (13) is sleeved on an end of the supporting foot tube (11) away from the connecting seat (2).

9. An electric fan, characterized in that: include: The support frame according to any one of claims 1 to 8, a connecting rod (50) and a fan body, wherein the fan body is mounted on one end of the connecting rod (50), and the end of the connecting rod (50) away from the fan body is inserted into the connecting seat (2).

10. The electric fan according to claim 9, characterized in that: The connecting seat (2) further comprises a fixed locking member (23); the locking member (23) comprises a knob bolt (231) and a locking nut (232); the knob bolt (231) passes through the connecting seat (2) in a horizontal direction, is threadedly connected to the locking nut (232), and then abuts against the connecting rod (50).

Images