Plectrum locking assembly, filter screen mounting structure and fresh air equipment

Abstract

The embodiment of the utility model provides a shifting piece locking assembly, a filter screen mounting structure and fresh air device.The shifting piece locking assembly comprises a supporting piece, a shifting piece locking piece and a shifting piece locking piece, and the supporting piece is provided with a first connecting hole; the locking structure comprises a shifting piece and a fastener, the shifting piece is provided with a second connecting hole penetrating through the shifting piece and a protruding part arranged on the peripheral side of the second connecting hole, and the fastener comprises a rod part and a head part located at one end of the rod part; the rod portion is arranged in the first connecting hole and the second connecting hole in a penetrating mode so that the poking piece can be rotationally connected with the supporting piece, the head portion faces the protruding portion, and the partial area of the side, close to the protruding portion, of the head portion abuts against the protruding portion. The shifting piece locking assembly is convenient to rotate and good in connection stability.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and particularly to a paddle locking component, a filter screen mounting structure, and a fresh air device. Background Art

[0002] Taking a fresh air device as an example, a fresh air device is an air conditioning device mainly used for inputting fresh outdoor air into a room and discharging dirty indoor air outdoors.

[0003] In general, a filter screen for filtering impurities such as dust is provided in the air flow path of a fresh air device. In the related art, a filter screen of a fresh air device is fixed by a rotatable paddle. Specifically, the paddle is rotatably connected to the housing of the fresh air device through a screw, and the disassembly and assembly of the filter screen can be realized by rotating the paddle.

[0004] However, it is difficult to control the tightening force of the screw in the related art. A too large tightening force will result in too large a rotational torque of the paddle and make it difficult to rotate, while a too small tightening force will cause the paddle to loosen. Summary of the Utility Model

[0005] In view of this, embodiments of the present application are expected to provide a paddle locking component, a filter screen mounting structure, and a fresh air device that are easy to rotate and have good connection stability.

[0006] To achieve the above object, an embodiment of the present application provides a paddle locking component, including:

[0007] A support member having a first connection hole;

[0008] A locking structure including a paddle and a fastener. The paddle has a second connection hole passing through the paddle and a convex portion provided on the periphery of the second connection hole. The fastener includes a rod portion and a head at one end of the rod portion. The rod portion passes through the first connection hole and the second connection hole to rotatably connect the paddle to the support member. The head faces the convex portion, and a partial area on the side of the head close to the convex portion abuts against the convex portion.

[0009] In one implementation, the side of the head close to the rod portion has a first contact surface, and the convex portion has a second contact surface abutting against the first contact surface. On a projection plane perpendicular to the penetration direction of the second connection hole through the paddle, a partial projection of the first contact surface is located outside the projection of the second contact surface; or,

[0010] The head is in line contact with the convex portion.

[0011] In one embodiment, on a projection plane perpendicular to the penetration direction of the second connection hole through the paddle, the projection of the raised portion has a first contour line and a second contour line, the second contour line is located on a side of the first contour line away from the projection of the second connection hole, and at least one of the first contour line and the second contour line is located outside the projection of the second contact surface.

[0012] In one embodiment, the distance between the first contour line and the second contour line is 1.5 mm to 2 mm.

[0013] In one embodiment, the raised portion surrounds the periphery of the second connection hole.

[0014] In one embodiment, the paddle has a plurality of the raised portions, and the plurality of the raised portions are arranged at intervals along the periphery of the second connection hole.

[0015] In one embodiment, the paddle has a mounting groove, the mounting groove is located on one side of the penetration direction of the second connection hole through the paddle and communicates with the second connection hole, the raised portion is located in the mounting groove, and the length of the raised portion along the penetration direction is less than the depth of the mounting groove along the penetration direction.

[0016] In one embodiment, the support member has a protruding boss, and the second connection hole is provided in the boss.

[0017] Another embodiment of the present application provides a filter screen mounting structure, including a filter screen and the above-mentioned paddle locking assembly. The support member has a mounting opening, the mounting opening is provided on one side of the first connection hole, the filter screen is covered at the mounting opening, and the paddle abuts against the filter screen by rotation to lock the filter screen on the support member.

[0018] Another embodiment of the present application provides a fresh air device, including the above-mentioned filter screen mounting structure.

[0019] An embodiment of the present application provides a paddle locking assembly, a filter screen mounting structure and a fresh air device. The paddle of the paddle locking assembly is provided with a raised portion, and a partial area of the side of the head of the fastener close to the raised portion abuts against the raised portion, which can reduce the frictional torque between the paddle and the head when the paddle rotates, so that the paddle is easy to rotate. At the same time, since the head abuts against the raised portion, the rod portion of the fastener passes through the first connection hole of the support member and the second connection hole of the paddle, so that the paddle is rotatably connected to the support member, and there is good connection stability between the paddle and the support member. Therefore, the paddle locking assembly of the embodiment of the present application can not only make the paddle easy to rotate, but also make the connection stability between the paddle and the support member good. Description of the Drawings

[0020] Figure 1 A pick - locking component provided by an embodiment of the present application;

[0021] Figure 2 is Figure 1 a cross - sectional view of the pick - locking component shown in

[0022] Figure 3 is Figure 2 a partially enlarged view at A in

[0023] Figure 4 is Figure 1 a structural schematic diagram of the locking structure shown in

[0024] Figure 5 is Figure 1 a cross - sectional view of the pick shown in

[0025] Figure 6 is Figure 1 a projection view of the convex part and the fastener shown in, and the shaded area in the figure is the second contact surface.

[0026] Explanation of reference numerals:

[0027] 10. Support member; 10a. First connection hole; 10b. Installation opening; 11. Boss; 20. Locking structure; 21. Pick; 21a. Second connection hole; 21b. Installation groove; 211. Convex part; 211a. Second contact surface; 211b. First contour line; 211c. Second contour line; 22. Fastener; 221. Head; 221a. First contact surface; 221. Third contour line; 222. Shank. Detailed implementation manners

[0028] In the description of the embodiments of the present application, it should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] The embodiments of the present application provide a filter installation structure, including a filter and a pick - locking component.

[0030] Please refer to Figures 1 to 3 , the pick - locking component includes a support member 10 having a first connection hole 10a and a locking structure 20.

[0031] The locking structure 20 includes a paddle 21 and a fastener 22. The paddle 21 has a second connection hole 21a penetrating through the paddle 21 and a convex portion 211 provided on the periphery of the second connection hole 21a. The fastener 22 includes a rod portion 222 and a head portion 221 located at one end of the rod portion 222. The rod portion 222 passes through the first connection hole 10a and the second connection hole 21a to rotatably connect the paddle 21 to the support member 10. The head portion 221 faces the convex portion 211, and a partial area on the side of the head portion 221 close to the convex portion 211 abuts against the convex portion 211.

[0032] The paddle 21 is used to lock the filter screen on the support member 10. Specifically, the support member 10 has an installation opening 10b provided on one side of the first connection hole 10a. The filter screen is covered on the installation opening 10b, and the paddle 21 abuts against the filter screen by rotation to lock the filter screen on the support member 10. That is to say, when the filter screen needs to be installed at the installation opening 10b, the paddle 21 rotates in the direction close to the installation opening 10b. When the filter screen needs to be removed, the paddle 21 rotates in the direction away from the installation opening 10b to separate the paddle 21 from the filter screen.

[0033] The fastener 22 is used to rotatably connect the paddle 21 to the support member 10. Specifically, the rod portion 222 of the fastener 22 passes through the second connection hole 21a on the paddle 21 and is inserted into the first connection hole 10a of the support member 10, so that the paddle 21 rotates around the rod portion 222 as the rotation axis.

[0034] The type of the fastener 22 is not limited. Exemplarily, the fastener 22 can be a bolt or a screw.

[0035] When the fastener 22 is tightened, a partial area on the side of the head portion 221 of the fastener 22 close to the convex portion 211 abuts against the convex portion 211 of the paddle 21. That is to say, the entire surface of the side of the head portion 221 close to the convex portion 211 does not contact the paddle 21, but only a partial area contacts the convex portion 211.

[0036] Exemplarily, please refer to Figure 1 、 Figure 2 、 Figure 4 and Figure 5 , the convex portion 211 can surround the periphery of the second connection hole 21a. That is to say, the convex portion 211 is arranged in a ring around the periphery of the second connection hole 21a.

[0037] Please refer to Figure 4 , the convex portion 211 can be circular. The circular convex portion 211 has a relatively stable structure and is easy to process.

[0038] In some other embodiments, the paddle 21 can also have a plurality of convex portions 211, and the plurality of convex portions 211 are arranged at intervals along the periphery of the second connection hole 21a.

[0039] Exemplarily, please refer to Figure 2 and Figures 4 to 6 , on one side where the head 221 is close to the rod portion 222, there may be a first contact surface 221a, and the protruding portion 211 has a second contact surface 211a that abuts against the first contact surface 221a. On the projection plane perpendicular to the penetration direction of the second connection hole 21a through the paddle 21, a partial projection of the first contact surface 221a is located outside the projection of the second contact surface 211a.

[0040] A partial projection of the first contact surface 221a is located outside the projection of the second contact surface 211a. That is to say, a partial area of the first contact surface 221a does not coincide with the projection of the second contact surface 211a. That is, a partial area of the first contact surface 221a abuts against the second contact surface 211a, rather than all areas of the first contact surface 221a abutting against the second contact surface 211a.

[0041] Since the fastener 22 generally remains stationary when the paddle 21 rotates, that is, relative rotation occurs between the first contact surface 221a and the second contact surface 211a. By making a partial projection of the first contact surface 221a located outside the projection of the second contact surface 211a, the contact area between the head 221 and the paddle 21 can be reduced, thereby reducing the frictional torque when the paddle 21 rotates, and thus making it easier for the paddle 21 to rotate.

[0042] Exemplarily, please refer to Figure 6 , the inner diameter of the second contact surface 211a is R0, the outer diameter of the second contact surface 211a is R1, the outer diameter of the first contact surface 221a is R2. Let the pre-tightening force of the fastener 22 be Q, the friction force between the fastener 22 and the protruding portion 211 be f, and the frictional torque between the fastener 22 and the protruding portion 211 be M. Then the pre-tightening force Q, the friction force f, and the frictional torque M satisfy the following relational expressions:

[0043]

[0044] where, dr is the micro-circle radius of the second contact surface 211a, S1 is the micro-circle area of the second contact surface 211a, S0 is the area of the first contact surface 221a, and μ is the friction coefficient.

[0045] Integrating d M gives the following relational expressions:[[]]

[0046]

[0047] It can be understood that the pre-tightening force Q, the outer diameter R2 of the first contact surface 221a, and the friction coefficient μ are generally fixed values. The inner diameter R0 of the second contact surface 211a generally coincides with the radius of the rod portion 222 and can also be regarded as a fixed value. Therefore, the frictional torque M is proportional to the cube of the outer diameter R1 of the second contact surface 211a. The magnitude of the frictional torque M can be reduced by reducing the value of the outer diameter R1 of the second contact surface 211a.

[0048] In another embodiment, the head and the convex portion may also be in line contact.

[0049] Line contact means that the contact area of the contact portion between the head and the convex portion is small, approximately in a line. By making the head and the convex portion in line contact, the contact area between the head and the convex portion can be further reduced to reduce the frictional torque between the head and the convex portion.

[0050] The embodiment of the present application also provides a fresh air device, and the fresh air device includes the filter installation structure provided in any embodiment of the present application.

[0051] In the embodiment of the present application, the flap 21 of the flap locking assembly is provided with a convex portion 211. A partial area of the side of the head 221 of the fastener 22 close to the convex portion 211 abuts against the convex portion 211, which can reduce the frictional torque between the flap 21 and the head 221 when the flap 21 rotates, so that the flap 21 is easy to rotate. At the same time, since the head 221 abuts against the convex portion 211, the rod portion 222 of the fastener 22 passes through the first connection hole 10a of the support member 10 and the second connection hole 21a of the flap 21 to rotatably connect the flap 21 and the support member 10. There is good connection stability between the flap 21 and the support member 10. Therefore, the flap locking assembly of the embodiment of the present application can not only make the flap 21 easy to rotate, but also ensure the connection stability between the flap 21 and the support member 10.

[0052] It should be noted that the filter installation structure of the embodiment of the present application is not limited to being used in fresh air devices. The filter installation structure of the embodiment of the present application can also be adopted on other devices that need to install filters. The flap locking assembly is not limited to being used in the filter installation structure either. The flap locking assembly of the embodiment of the present application can be adopted for any other component that needs to be locked. When the flap locking assembly is used in other scenarios, the support member 10 can be provided with an installation opening 10b or not provided with an installation opening 10b according to the needs.

[0053] In one embodiment, please refer to Figure 2 and Figure 6On the projection plane perpendicular to the penetration direction of the second connecting hole 21a through the paddle 21, the projection of the raised portion 211 may have a first contour line 211b and a second contour line 211c, the second contour line 211c is located on the side of the first contour line 211b away from the projection of the second connecting hole 21a, and the first contour line 211b and the second contour line 211c are both located outside the projection of the second contact surface 211a.

[0054] That is to say, neither the first contour line 211b nor the second contour line 211c coincides with the projection of the second contact surface 211a, and the projection of the second contact surface 211a is located between the first contour line 211b and the second contour line 211c, which is equivalent to the size of the projection of the second contact surface 211a being larger than the size of the first contour line 211b, and the size of the outer diameter of the projection of the second contact surface 211a being smaller than the size of the second contour line 211c. Thus, the protrusion 211 can have a higher structural strength to ensure that the protrusion 211 is difficult to deform when the fastener 22 is locked, and the area of ​​the second contact surface 211a can be further reduced.

[0055] It should be noted that the raised portion 211 is not limited to making the first contour line 211b and the second contour line 211c both located outside the projection of the second contact surface 211a. For example, in some embodiments, the first contour line 211b may be located outside the projection of the second contact surface 211a, and the second contour line 211c may coincide with the projection of the second contact surface 211a. Alternatively, the second contour line 211c may be located outside the projection of the second contact surface 211a, and the first contour line 211b may coincide with the projection of the second contact surface 211a.

[0056] To ensure that the protrusion 211 has a high structural strength, for example, refer to Figure 6 , the distance between the first contour line 211b and the second contour line 211c may be 1.5 mm to 2 mm (including the end points).

[0057] In one embodiment, please refer to Figure 1 , Figures 3 to 5 The paddle 21 has a mounting groove 21b, which is located on one side of the penetration direction of the second connecting hole 21a through the paddle 21 and is connected to the second connecting hole 21a. The protrusion 211 is located in the mounting groove 21b, and the length of the protrusion 211 along the penetration direction is less than the depth of the mounting groove 21b along the penetration direction.

[0058] That is, when the head 221 of the fastener 22 abuts against the protrusion 211 , at least a portion of the head 221 may be located in the mounting groove 21 b .

[0059] More preferably, the depth of the installation groove 21b in the through direction can be increased as much as possible, so that when the head 221 abuts against the protruding portion 211, the head 221 can be completely located within the installation groove 21b.

[0060] At least a part of the head 221 is located within the installation groove 21b, which can play a certain protective role for the head 221.

[0061] In one embodiment, please refer to FIGS. 1 and Figure 3 , the support member 10 can be provided with a protruding boss 11, and the second connection hole 21a is provided on the boss 11. That is to say, the paddle 21 is rotatably connected to the boss 11. By rotatably connecting the paddle 21 to the boss 11, not only can the connection strength between the paddle 21 and the support member 10 be enhanced, but also the deformation at the connection between the support member 10 and the paddle 21 can be better avoided.

[0062] In the description of the present application, the description with reference to terms such as "in one embodiment", "in some embodiments", "in other embodiments", "in still other embodiments", or "exemplary" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine the different embodiments or examples described in the present application and the features of different embodiments or examples.

[0063] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A paddle locking assembly, characterized in that: include: A support member, wherein the support member has a first connecting hole; A locking structure, the locking structure includes a paddle and a fastener, the paddle has a second connecting hole passing through the paddle and a raised portion arranged around the second connecting hole, the fastener includes a rod and a head located at one end of the rod, the rod is inserted into the first connecting hole and the second connecting hole so that the paddle is rotatably connected to the support, the head faces the raised portion, and a partial area of ​​the head close to the raised portion is in contact with the raised portion.

2. The paddle lock assembly according to claim 1, characterized in that: The head has a first contact surface on a side close to the rod, the protrusion has a second contact surface abutting against the first contact surface, and a portion of the projection of the first contact surface is located outside the projection of the second contact surface on a projection surface perpendicular to a direction in which the second connecting hole penetrates the paddle; or The head portion is in line contact with the protrusion portion.

3. The paddle lock assembly according to claim 2, characterized in that: On a projection surface perpendicular to the direction in which the second connecting hole penetrates the paddle, the projection of the raised portion has a first contour line and a second contour line, the second contour line is located on a side of the first contour line that is away from the projection of the second connecting hole, and at least one of the first contour line and the second contour line is located outside the projection of the second contact surface.

4. The paddle lock assembly according to claim 3, characterized in that: The distance between the first contour line and the second contour line is 1.5 mm to 2 mm.

5. The paddle locking assembly according to any one of claims 1 to 4, characterized in that: The protrusion surrounds the circumference of the second connecting hole.

6. The paddle locking assembly according to any one of claims 1 to 4, characterized in that: The paddle has a plurality of protrusions, and the plurality of protrusions are arranged at intervals along the circumference of the second connecting hole.

7. The paddle locking assembly according to any one of claims 1 to 4, characterized in that: The paddle has an installation groove, which is located on one side of the penetration direction of the second connecting hole through the paddle and is connected to the second connecting hole. The protrusion is located in the installation groove, and the length of the protrusion along the penetration direction is less than the depth of the installation groove along the penetration direction.

8. The paddle locking assembly according to any one of claims 1 to 4, characterized in that: The support member has a protruding boss, and the second connecting hole is arranged on the boss.

9. A filter screen installation structure, characterized in that: It includes a filter and a paddle locking assembly as described in any one of claims 1 to 8, wherein the support member has a mounting port, the mounting port is arranged on one side of the first connecting hole, the filter cover is arranged at the mounting port, and the paddle abuts against the filter by rotating to lock the filter on the support member.

10. A fresh air device, characterized in that: Including the filter installation structure described in claim 9.

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