Electric fan

Abstract

The utility model discloses an electric fan, and belongs to the technical field of electrical equipment. The electric fan comprises a supporting column, a fan body, a first connecting piece, a second connecting piece and a base. The first connecting piece and the second connecting piece can be in threaded connection through the first thread and the second thread, a limiting protrusion is arranged in the first thread, and a spiral protrusion is arranged in the second thread. Thus, in the process that the two threads rotate relatively to achieve installation of the two connecting pieces, the first end of the spiral protrusion can firstly make contact with the limiting protrusion, then the first end slides through the limiting protrusion, the limiting protrusion makes contact with the spiral protrusion in a sliding mode, and finally the second end slides through the limiting protrusion. And the limiting bulge and the spiral bulge mutually generate a limiting effect, so that the first thread and the second thread can be effectively prevented from loosening under the condition of no external force or very small external force, and the anti-loosening effect can be realized.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and in particular to an electric fan. Background Art

[0002] At present, electric fans have become one of the most frequently used household appliances in summer.

[0003] Some components in an electric fan (for example, a column and a base) are usually connected by threaded connection.

[0004] However, the above connection method easily leads to poor connection stability between components. Utility Model Content

[0005] The embodiment of the present application provides an electric fan, which can solve the problem of poor connection stability between two components in the electric fan in the prior art by threaded connection. The technical solution is as follows:

[0006] In one aspect, an electric fan is provided, the electric fan comprising:

[0007] A support column, a fan body, a first connecting member, a second connecting member and a base;

[0008] One end of the support column is connected to the fan body, and one end of the support column away from the fan body is connected to the first connecting member; the second connecting member is connected to the base, and the second connecting member is threadedly connected to the first connecting member;

[0009] One of the first connecting member and the second connecting member has a first thread and a limiting protrusion located in the first thread; the other of the first connecting member and the second connecting member has a second thread matched with the first thread, the second thread includes a spiral protrusion, and the spiral protrusion has a first end and a second end sequentially arranged along the second thread relative to the first thread screwing direction;

[0010] Wherein, after the first thread is threadedly connected with the second thread, the second end of the spiral protrusion is closer to the limiting protrusion than the first end.

[0011] Optionally, the first thread has a first tooth-shaped protrusion and a first tooth-shaped groove extending in a spiral shape, and the limiting protrusion is located in the first tooth-shaped groove;

[0012] The second thread has a second tooth-shaped protrusion and a second tooth-shaped groove extending in a spiral shape, and at least a portion of the second tooth-shaped protrusion is the spiral protrusion;

[0013] Wherein, after the first thread is threadedly connected with the second thread, the first tooth-shaped protrusion is located in the second tooth-shaped groove, and the second tooth-shaped protrusion is located in the first tooth-shaped groove.

[0014] Optionally, the limiting protrusion is arranged toward the end of the first tooth-shaped groove; the second tooth-shaped protrusion includes: the spiral protrusion, and a tooth-shaped body portion separated from the spiral protrusion, and in the spiral extension direction of the second tooth-shaped protrusion, the second end portion of the spiral protrusion is closer to the tooth-shaped body portion than the first end portion;

[0015] Wherein, after the first thread and the second thread are threadedly connected, the spiral protrusion is located between the limiting protrusion and the end of the first tooth-shaped groove.

[0016] Optionally, in the case where the second thread is an internal thread, the tooth-shaped main body includes: a plurality of strip-shaped protrusions arranged in partitions, the plurality of strip-shaped protrusions are divided into at least two groups, a group of the strip-shaped protrusions includes at least two strip-shaped protrusions distributed along the axial direction of the support column, and the extension lengths of each strip-shaped protrusion in a group of the strip-shaped protrusions are equal.

[0017] Optionally, the spiral protrusion is arranged adjacent to a group of the strip-shaped protrusions, and an extension length of the spiral protrusion is less than or equal to an extension length of the strip-shaped protrusions.

[0018] Optionally, the limiting protrusion has an arc-shaped convex surface on a side away from the bottom surface of the first tooth-shaped groove.

[0019] Optionally, the electric fan further comprises: a bracket detachably connected to an end of the support column away from the base, the bracket being connected to the fan body.

[0020] Optionally, the end of the bracket facing the support column has a first cavity and a clamping hole connected to the first cavity;

[0021] The end of the support column away from the base has: a connecting portion and a clamping portion, one end of the clamping portion is rotatably connected to the side of the connecting portion, and the other end of the clamping portion has a clamping protrusion;

[0022] Wherein, after at least a portion of the connecting portion and at least a portion of the clamping portion are both extended into the first cavity, the clamping protrusion and the clamping hole can be clamped.

[0023] Optionally, the side of the connecting portion has a mounting groove; the clamping portion comprises: a clamping portion body, a first elastic element and the clamping protrusion;

[0024] The main body of the clamping part is located in the mounting groove, and one end of the main body of the clamping part is rotatably connected to the connecting part in the mounting groove, and the other end of the main body of the clamping part is fixedly connected to the clamping protrusion, and the clamping protrusion is located outside the mounting groove; the first elastic element is located between the main body of the clamping part and the bottom surface of the mounting groove, and is respectively connected to the main body of the clamping part and the bottom surface of the mounting groove.

[0025] Optionally, the connecting part also has a first limiting opening connected to the mounting groove; the clamping part also includes: a supporting plate fixedly connected to the side of the clamping protrusion facing away from the clamping part body, and a portion of the supporting plate can extend out of the mounting groove through the first limiting opening.

[0026] Optionally, the end of the bracket facing the support column has: a second cavity, an assembly component fixed in the second cavity, and a key opening communicating with the second cavity; the assembly component has the first cavity and the clamping hole, and a second limit opening communicating with the first cavity, and a portion of the bearing plate can also extend through the second limit opening;

[0027] The electric fan further includes: a button portion installed at the button opening, wherein a portion of the button portion extending into the second cavity contacts a portion of the supporting plate extending through the first limiting opening and the second limiting opening in sequence.

[0028] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0029] An electric fan may include: a support column, a fan body, a first connecting member, a second connecting member and a base. The first connecting member and the second connecting member may be threadedly connected by a first thread and a second thread, and a limiting protrusion is provided in the first thread, and a spiral protrusion is provided in the second thread. In this way, during the relative rotation of the two threads to achieve the installation of the two connecting members, the first end of the spiral protrusion may first contact the limiting protrusion, and then the first end may slide over the limiting protrusion, the limiting protrusion may contact and slide with the spiral protrusion, and finally the second end may slide over the limiting protrusion. Here, the limiting protrusion and the spiral protrusion have a limiting effect on each other, and in the absence of external force or very small external force, the first thread and the second thread can be effectively prevented from loosening, that is, the anti-loosening effect can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a structural schematic diagram of an electric fan provided in an embodiment of the present application;

[0032] Figure 2 yes Figure 1 Schematic diagram of the explosion at A;

[0033] Figure 3 yes Figure 1 Schematic diagram of the cross section at A;

[0034] Figure 4 It is a partial structural exploded schematic diagram of an electric fan provided in an embodiment of the present application;

[0035] Figure 5 It is a partial structure of an electric fan provided by an embodiment of the present application;

[0036] Figure 6 yes Figure 5 A cross-sectional view at point B;

[0037] Figure 7 yes Figure 5 Schematic diagram of the explosion at B;

[0038] Figure 8 It is a partial structural schematic diagram of another electric fan provided in an embodiment of the present application.

[0039] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0041] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 is a structural schematic diagram of an electric fan provided in an embodiment of the present application, Figure 2 yes Figure 1 Schematic diagram of the explosion at A. Figure 3 yes Figure 1 Schematic cross-sectional view at A. The electric fan may include: a support column 100 , a fan body 200 , a first connecting member 300 , a second connecting member 400 and a base 500 .

[0042] One end of the support column 100 in the electric fan can be connected to the fan body 200, and the end of the support column 100 away from the fan body 200 can be connected to the first connector 300. The second connector 400 can be connected to the base 500, and the second connector 400 can be threadedly connected to the first connector 300.

[0043] One of the first connector 300 and the second connector 400 in the electric fan may have a first thread A and a limiting protrusion B located in the first thread A; the other of the first connector 300 and the second connector 400 may have a second thread C that cooperates with the first thread A, and the second thread C may include a spiral protrusion C11, and the spiral protrusion C11 may have a first end a1 and a second end a2 sequentially arranged along the screw-in direction of the second thread C relative to the first thread A. For example, the first thread A may be a male thread, and the second thread C may be a female thread. It should be noted that the embodiments of the present application are schematically described by taking the first connector 300 having the second thread C and the second connector 400 having the first thread A as an example. In other possible implementations, the first connector 300 may have a first thread A, and the second connector 400 may have a second thread C.

[0044] After the first thread A is threadedly connected with the second thread C, the second end a2 of the spiral protrusion C11 may be closer to the limiting protrusion B than the first end a1.

[0045] In the embodiment of the present application, the first connector 300 and the second connector 400 can be threadedly connected by a first thread A and a second thread C, and a limiting protrusion B is provided in the first thread A, and a spiral protrusion C11 is provided in the second thread C. In this way, in the process of relative rotation of the two threads to realize the installation of the two connectors, the first end a1 in the spiral protrusion C11 can first contact the limiting protrusion B, and then the first end a1 in the spiral protrusion C11 slides over the limiting protrusion B, the limiting protrusion B contacts and slides with the spiral protrusion C11, and finally the second end a2 in the spiral protrusion C11 slides over the limiting protrusion B. Here, the limiting protrusion B and the spiral protrusion C11 have a limiting effect on each other, and in the absence of external force or very small external force, the first thread A and the second thread C can be effectively prevented from loosening, that is, the anti-loosening effect can be achieved. It should be noted that in the process of contact and sliding between the spiral protrusion C11 and the limiting protrusion B, the limiting protrusion B produces a certain damping force on the sliding of the spiral protrusion C11.

[0046] For example, during the installation of the two connectors, the second connector 400 is stationary, and the second thread C rotates in the first direction f1 relative to the first thread A. After the second end a2 of the spiral protrusion C11 slides over the limiting protrusion B, the limiting protrusion B can limit the spiral protrusion C11, preventing the spiral protrusion C11 from sliding in the second direction relative to the limiting protrusion B in the absence of external force or with very little external force. Here, the first direction and the second direction are opposite, and one of the first direction and the second direction can be clockwise, and the other of the first direction and the second direction can be counterclockwise. It should be noted that the rotation direction of the first direction and the second direction can be determined according to the rotation direction of the first thread and the second thread, which is not limited here.

[0047] In summary, an embodiment of the present application provides an electric fan, which may include: a support column, a fan body, a first connecting member, a second connecting member and a base. The first connecting member and the second connecting member may be threadedly connected by a first thread and a second thread, and a limiting protrusion is provided in the first thread, and a spiral protrusion is provided in the second thread. In this way, during the relative rotation of the two threads to achieve the installation of the two connecting members, the first end of the spiral protrusion may first contact the limiting protrusion, and then the first end slides over the limiting protrusion, the limiting protrusion contacts and slides with the spiral protrusion, and finally the second end slides over the limiting protrusion. Here, the limiting protrusion and the spiral protrusion have a limiting effect on each other, and in the absence of external force or very small external force, the first thread and the second thread can be effectively prevented from loosening, that is, the anti-loosening effect can be achieved.

[0048] Optional, please refer to Figure 4 , Figure 4It is a partial structural exploded schematic diagram of an electric fan provided in an embodiment of the present application. The first thread A in the second connecting member 400 may have a first tooth-shaped protrusion A1 and a first tooth-shaped groove A2 extending in a spiral shape, and the limiting protrusion B may be located in the first tooth-shaped groove A2. The second thread C in the first connecting member 300 may have a second tooth-shaped protrusion C1 and a second tooth-shaped groove C2 extending in a spiral shape, and at least a portion of the second tooth-shaped protrusion C1 may be a spiral protrusion C11. Among them, after the first thread A and the second thread C are threadedly connected, the first tooth-shaped protrusion A1 in the first thread A may be located in the second tooth-shaped groove C2 in the second thread C, and the second tooth-shaped protrusion C1 in the second thread C may be located in the first tooth-shaped groove A2 in the first thread A. In this case, by setting the limiting protrusion B in the first tooth-shaped groove A2 of the first thread A, during the connection between the first thread A and the second thread C, the first tooth-shaped protrusion A1 can slide in the second tooth-shaped groove C2, the second tooth-shaped protrusion C1 can slide in the first tooth-shaped groove A2, and at least part of the second tooth-shaped protrusion C1 is the spiral protrusion C11. In this way, by limiting the spiral protrusion C11 by the limiting protrusion B, the first thread A and the second thread C can be effectively prevented from loosening.

[0049] In the embodiments of the present application, Figure 4 As shown, the limiting protrusion B located in the first tooth-shaped groove A2 can be arranged toward the end b1 of the first tooth-shaped groove A2; the second tooth-shaped protrusion C1 can include: a thread protrusion C11, and a tooth-shaped body part C12 separated from the spiral protrusion C11, and in the spiral extension direction of the second tooth-shaped protrusion C1, the second end a2 of the spiral protrusion C11 is closer to the tooth-shaped body part C12 than the first end a1. After the first thread A and the second thread C are threadedly connected, the spiral protrusion C11 can be located between the limiting protrusion B and the end b1 of the first tooth-shaped groove A2. In this case, by setting the limiting protrusion B at a position adjacent to the end b1 of the first tooth-shaped groove A2, when the first end a1 of the spiral protrusion C11 slides over the limiting protrusion B, the spiral protrusion C11 contacts and slides with the limiting protrusion B (the limiting protrusion generates a certain damping force on the spiral protrusion), and when the second end a2 of the spiral protrusion C11 slides over the limiting protrusion B, the damping force of the limiting protrusion B on the spiral protrusion C11 disappears. In this way, while playing a limiting role, it can provide the user with prompt information that the first thread A and the second thread C are installed in place, which improves the user's experience.

[0050] Here, after the two threads are installed in place, the second end a2 of the spiral protrusion C11 can contact the limiting protrusion B, and the first end a1 of the spiral protrusion C11 can contact the end b1 of the first tooth-shaped groove A2. It should be noted that in the threaded connection method, the tooth-shaped groove usually has a starting end and an end. When the first thread and the second thread are in a tightened state, the starting end of the second tooth-shaped protrusion can cooperate with the end of the first tooth-shaped groove, and the starting end of the first tooth-shaped protrusion can cooperate with the end of the second tooth-shaped groove.

[0051] Optional, such as Figure 4 As shown, in the case where the second thread C is an internal thread, that is, the second thread C can be a female thread, the tooth-shaped body part C12 in the second thread C can include: a plurality of strip protrusions C121 arranged in a partitioned manner, and the plurality of strip protrusions C121 can be divided into at least two groups, one group of strip protrusions includes at least two strip protrusions distributed along the axial direction of the support column 100, and the extension lengths of each strip protrusion in a group of strip protrusions along the circumferential direction are equal. In this case, by setting the plurality of strip protrusions C121 in a partitioned manner, that is, there is a certain gap between two adjacent groups of strip protrusions, so that after the second thread C is formed by the injection molding process, demolding is convenient. For example, the plurality of strip protrusions can be divided into two groups, and the two groups of strip protrusions can be axially symmetrically distributed along the axial centerline of the support shaft. In the present application, as Figure 4 As shown, the spiral protrusion C11 in the internal thread can be arranged adjacent to a group of strip protrusions, and the extension length of the spiral protrusion C11 can be less than or equal to the extension length of the strip protrusions in the group of strip protrusions C121.

[0052] In the embodiments of the present application, Figure 4 As shown, the side of the limiting protrusion B located in the first tooth-shaped groove A2 away from the bottom surface of the first tooth-shaped groove A2 can have an arc-shaped convex surface. In this case, by setting one side of the limiting protrusion B as an arc-shaped convex surface, the resistance between the limiting protrusion B and the spiral protrusion C11 when they are in contact and sliding is reduced, which is convenient for users to install.

[0053] Optional, please refer to Figure 5 , Figure 6 and Figure 7 , Figure 5 This is a partial structure of an electric fan provided in an embodiment of the present application. Figure 6 yes Figure 5 The cross-sectional view at B, Figure 7 yes Figure 5Schematic diagram of explosion at B. The electric fan may further include: a bracket 600 detachably connected to the end of the support column 100 away from the base 500, and the bracket 600 may be connected to the fan body 200. In this case, the fan body 200 (i.e., the fan head) is installed by the bracket 600, and the bracket 600 and the support column 100 can be detachably connected, so that the fan body 200 can be easily removed from the support column 100 for maintenance or storage.

[0054] In the embodiments of the present application, Figure 6 and Figure 7 As shown, the end of the bracket 600 facing the support column 100 may have a first cavity c1 and a snap-in hole c2 connected to the first cavity c1. The end of the support column 100 away from the base 500 may have: a connecting portion 101 and a snap-in portion 102, one end of the snap-in portion 102 may be rotatably connected to the side of the connecting portion 101, and the other end of the snap-in portion 102 may have a snap-in protrusion 102a. Among them, after at least a portion of the connecting portion 101 and at least a portion of the snap-in portion 102 are both extended into the first cavity c1 in the bracket 600, the snap-in protrusion 102 in the snap-in portion 102 can be snap-in with the snap-in hole c2. In this case, by providing the first cavity c1 and the snap-in hole c2 connected to the first cavity c1 at the end of the bracket 600, the end of the support column 100 is provided with the connecting portion 101 and the snap-in portion 102. In this way, after at least a portion of the connecting portion 101 and at least a portion of the clamping portion 102 are inserted into the first cavity c1, the clamping protrusion 102a on the clamping portion 102 can be clamped with the clamping hole c2 to achieve the connection between the bracket 600 and the support column 100. It should be noted that after at least a portion of the connecting portion 101 and at least a portion of the clamping portion 102 are inserted into the first cavity c1 of the bracket 600, the support column 100 can be limited in the horizontal direction (for example, the X-axis and Y-axis directions) through the first cavity c1, and the clamping of the clamping hole c2 and the clamping protrusion 102a can limit the support column 100 in the vertical direction (for example, the Z-axis direction). When the bracket 600 needs to be disassembled from the support column 100 , a certain external force is applied to the clamping protrusion 102 a to separate the clamping protrusion 102 a from the clamping hole c2 , thereby achieving the disassembly of the bracket 600 from the support column 100 .

[0055] Optional, please refer to Figure 6 , Figure 7 and Figure 8 , Figure 81 is a partial structural schematic diagram of another electric fan provided by an embodiment of the present application. The side of the connecting portion 101 may have a mounting groove 101a, and the clamping portion 102 may include: a clamping portion body 102c, a first elastic element 102b and a clamping protrusion 102a. The clamping portion body 102c may be located in the mounting groove 101a, and one end of the clamping portion body 102c is rotatably connected to the connecting portion 101 in the mounting groove 101a, and the other end of the clamping portion body 102c is fixedly connected to the clamping protrusion 102a, and the clamping protrusion 102a may be located outside the mounting groove 101a. The first elastic element 102b is located between the clamping portion body 102c and the bottom surface of the mounting groove 101a, and may be connected to the clamping portion body 102c and the bottom surface of the mounting groove 101a respectively. In this case, when the bracket 600 is connected to the support column 100, the clamping part body 102c can rotate toward the bottom surface of the mounting groove 101a under the action of external force, and can compress the first elastic element 102b at the same time; when the clamping protrusion 102a at one end of the clamping part body 102c moves to the clamping hole c2, the clamping part body 102c rotates away from the bottom surface of the mounting groove 101a under the action of the first elastic element 102b, so that the clamping protrusion 102a is clamped with the clamping hole c2. When the bracket 600 and the support column 100 need to be disassembled, a force is applied to the clamping protrusion 102a toward the bottom surface of the mounting groove 101a, so that the clamping protrusion 102a is separated from the clamping hole c2, that is, the connecting part 101 and the clamping part 102 in the support column 100 can be pulled out from the first cavity c1. For example, one end of the clamping part body 102c can be rotatably connected to the side of the connecting part 101 by matching a connecting shaft and a hole. For example, one end of the clamping part body has a connecting shaft, and the side of the connecting part has a connecting hole connected to the mounting groove, and the connecting shaft is rotatably connected to the connecting hole.

[0056] In the embodiments of the present application, Figure 7 and Figure 8As shown, the connecting portion 101 may also have a first limiting opening 101b connected to the mounting groove 101a, and the first limiting opening 101b and the mounting groove 101a may be arranged along the axial direction of the connecting portion 101. The clamping portion 102 may also include: a supporting plate 102d fixedly connected to a side of the clamping protrusion 102a away from the clamping portion body 102c, and a portion of the supporting plate 102d can extend out of the mounting groove 101a through the first limiting opening 101b. In this case, by setting a first limiting opening 101b on the side of the connecting part 101 and communicating with the mounting groove 101a, a portion of the supporting plate 102d in the clamping part 102 can extend out of the mounting groove 101a through the first limiting opening 101b. In this way, the first limiting opening 101b can play a certain limiting role on the supporting plate 102d, thereby preventing the clamping part 102 from excessively rotating relative to the connecting part 101 after the bracket 600 is removed from the support column 100, thereby affecting the subsequent installation of the bracket 600 and the support column 100.

[0057] Optional, such as Figure 6 and Figure 7 As shown, the end of the bracket 600 facing the support column 100 may have: a second cavity d1, an assembly component 601 fixed in the second cavity d1, and a key opening d2 connected to the second cavity d1. The assembly component 601 may have a first cavity c1 and a snap-in hole c2, and a second limit opening c3 connected to the first cavity c1, and a portion of the support plate 102d can also extend through the second limit opening c3. The electric fan may also include: a key portion 700 installed at the key opening d2, and the portion of the key portion 700 extending into the second cavity d1 can contact the portion of the support plate 102d extending through the first limit opening 101b and the second limit opening c3 in sequence. In this case, by setting the second cavity d1 at the end of the bracket 600 and the assembly component 601 fixed in the second cavity d1, the first cavity c1 and the clamping hole c2 can be set on the assembly component 601, so that the concealed setting of the clamping hole c2 can be realized, and after the bracket 600 is connected to the support column 100, the clamping protrusion 102a can be hidden in the second cavity d1, so that the appearance of the electric fan is better. In addition, a key opening d2 is set at the end of the bracket 600, and the key part 700 is installed in the key opening d2, and the part of the supporting plate 102d extending from the two limit openings can contact the part of the key part 700 extending into the second cavity d1. In this way, after pressing the button part 700, the button part 700 can push the supporting plate 102d to move, thereby driving the clamping part 102 to rotate toward the bottom surface of the installation groove 101a, so that the clamping protrusion 102a is separated from the clamping hole c2, that is, the bracket 600 and the support column 100 are quickly disassembled with one button. Figure 7As shown, the button part 700 may include: a button cap 701 and a pressure rod 702, the button cap 701 may be located at the button opening d2, one end of the pressure rod 702 is fixedly connected to the button cap 701, and the other end of the pressure rod 702 extends into the second cavity d1 and contacts the supporting plate 102d. In addition, the button part 700 may also include: a second elastic element 703 sleeved on the pressure rod 702, one end of the second elastic element 703 contacts the button cap 701, and the other end of the second elastic element 703 contacts the bracket 600, and the reset function of the button part 700 can be realized by the second elastic element 703. For example, the second elastic element 703 may be a coil spring.

[0058] Optional, such as Figure 7 As shown, the end of the opening surface of the first cavity c1 in the assembly component 601 may have a first guiding bevel e1, and the side of the snap-fitting protrusion 102a away from the connecting portion 101 may have a second guiding bevel e2 that cooperates with the first guiding bevel e1. The cooperation of the first guiding bevel e1 and the second guiding bevel e2 can facilitate the connection between the bracket 600 and the connecting portion 101 and the snap-fitting portion 102 in the support column 100, which has a certain installation guiding effect.

[0059] In summary, an embodiment of the present application provides an electric fan, which may include: a support column, a fan body, a first connecting member, a second connecting member and a base. The first connecting member and the second connecting member may be threadedly connected by a first thread and a second thread, and a limiting protrusion is provided in the first thread, and a spiral protrusion is provided in the second thread. In this way, during the relative rotation of the two threads to achieve the installation of the two connecting members, the first end of the spiral protrusion may first contact the limiting protrusion, and then the first end slides over the limiting protrusion, the limiting protrusion contacts and slides with the spiral protrusion, and finally the second end slides over the limiting protrusion. Here, the limiting protrusion and the spiral protrusion have a limiting effect on each other, and in the absence of external force or very small external force, the first thread and the second thread can be effectively prevented from loosening, that is, the anti-loosening effect can be achieved.

[0060] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0061] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An electric fan, characterized in that: include: A support column (100), a fan body (200), a first connecting member (300), a second connecting member (400) and a base (500); One end of the support column (100) is connected to the fan body (200), and one end of the support column (100) facing away from the fan body (200) is connected to the first connecting member (300); the second connecting member (400) is connected to the base (500), and the second connecting member (400) is threadedly connected to the first connecting member (300); One of the first connecting member (300) and the second connecting member (400) has a first thread (A) and a limiting protrusion (B) located inside the first thread (A); the other of the first connecting member (300) and the second connecting member (400) has a second thread (C) matched with the first thread (A), the second thread (C) includes a spiral protrusion (C11), and the spiral protrusion (C11) has a first end (a1) and a second end (a2) arranged in sequence along a screwing direction of the second thread (C) relative to the first thread (A); Wherein, after the first thread (A) and the second thread (C) are threadedly connected, the second end portion (a2) of the spiral protrusion (C11) is closer to the limiting protrusion (B) than the first end portion (a1).

2. The electric fan according to claim 1, characterized in that: The first thread (A) has a first tooth-shaped protrusion (A1) and a first tooth-shaped groove (A2) extending in a spiral shape, and the limiting protrusion (B) is located in the first tooth-shaped groove (A2); The second thread (C) has a second tooth-shaped protrusion (C1) and a second tooth-shaped groove (C2) extending in a spiral shape, and at least a portion of the second tooth-shaped protrusion (C1) is the spiral protrusion (C11); Wherein, after the first thread (A) and the second thread (C) are threadedly connected, the first tooth-shaped protrusion (A1) is located in the second tooth-shaped groove (C2), and the second tooth-shaped protrusion (C1) is located in the first tooth-shaped groove (A2).

3. The electric fan according to claim 2, characterized in that: The limiting protrusion (B) is arranged toward the end (b1) of the first tooth-shaped groove (A2); the second tooth-shaped protrusion (C1) comprises: the spiral protrusion (C11), and a tooth-shaped body portion (C12) arranged separately from the spiral protrusion (C11); in the spiral extension direction of the second tooth-shaped protrusion (C1), the second end portion (a2) of the spiral protrusion (C11) is closer to the tooth-shaped body portion (C12) than the first end portion (a1); Wherein, after the first thread (A) and the second thread (C) are threadedly connected, the spiral protrusion (C11) is located between the limiting protrusion (B) and the end (b1) of the first tooth-shaped groove (A2).

4. The electric fan according to claim 3, characterized in that: When the second thread (C) is an internal thread, the tooth-shaped main body (C12) includes: a plurality of strip-shaped protrusions (C121) arranged in a partitioned manner, and the plurality of strip-shaped protrusions (C121) are divided into at least two groups, and a group of the strip-shaped protrusions (C121) includes at least two strip-shaped protrusions distributed along the axial direction of the support column, and the extension lengths of the respective strip-shaped protrusions in a group of the strip-shaped protrusions (C121) are equal.

5. The electric fan according to claim 4, characterized in that: The spiral protrusion (C11) is arranged adjacent to a group of the strip-shaped protrusions (C121), and the extension length of the spiral protrusion (C11) is less than or equal to the extension length of the strip-shaped protrusions (C121).

6. The electric fan according to claim 2, characterized in that: The limiting protrusion (B) has an arc-shaped convex surface on the side away from the bottom surface of the first tooth-shaped groove (A2).

7. The electric fan according to any one of claims 1 to 6, characterized in that: The electric fan further comprises: a bracket (600) detachably connected to an end of the support column (100) away from the base (500), and the bracket (600) is connected to the fan body (200).

8. The electric fan according to claim 7, characterized in that: The end of the bracket (600) facing the support column (100) has a first cavity (c1) and a clamping hole (c2) communicating with the first cavity (c1); The end of the support column (100) facing away from the base (500) comprises: a connecting portion (101) and a clamping portion (102), one end of the clamping portion (102) is rotatably connected to the side surface of the connecting portion (101), and the other end of the clamping portion (102) comprises a clamping protrusion (102a); Wherein, after at least a portion of the connecting portion (101) and at least a portion of the clamping portion (102) are both extended into the first cavity (c1), the clamping protrusion (102a) and the clamping hole (c2) can be clamped.

9. The electric fan according to claim 8, characterized in that: The side surface of the connecting portion (101) is provided with a mounting groove (101a); the clamping portion (102) comprises: a clamping portion body (102c), a first elastic element (102b) and the clamping protrusion (102a); The clamping portion body (102c) is located in the mounting groove (101a), and one end of the clamping portion body (102c) is rotatably connected to the connecting portion (101) in the mounting groove (101a), and the other end of the clamping portion body (102c) is fixedly connected to the clamping protrusion (102a), and the clamping protrusion (102a) is located outside the mounting groove (101a); the first elastic element (102b) is located between the clamping portion body (102c) and the bottom surface of the mounting groove (101a), and is respectively connected to the clamping portion body (102c) and the bottom surface of the mounting groove (101a).

10. The electric fan according to claim 9, characterized in that: The connecting portion (101) also has a first limiting opening (101b) connected to the mounting groove (101a); the clamping portion (102) further comprises: a supporting plate (102d) fixedly connected to a side of the clamping protrusion (102a) facing away from the clamping portion body (102c), and a portion of the supporting plate (102d) can extend out of the mounting groove (101a) through the first limiting opening (101b).

11. The electric fan according to claim 10, characterized in that: The end of the bracket (600) facing the support column (100) comprises: a second cavity (d1), an assembly component (601) fixed in the second cavity (d1), and a key opening (d2) communicating with the second cavity (d1); the assembly component (601) comprises the first cavity (c1) and the snap-fit ​​hole (c2), and a second limit opening (c3) communicating with the first cavity (c1), and a portion of the support plate (102d) can also extend through the second limit opening (c3); The electric fan further comprises: a button portion (700) mounted at the button opening (d2), wherein a portion of the button portion (700) extending into the second cavity (d1) contacts a portion of the supporting plate (102d) extending through the first limiting opening (101b) and the second limiting opening (c3) in sequence.

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