Air volume switch

Abstract

The utility model provides an air volume switch, which comprises a shell and a conductive structure arranged in the shell, the conductive structure comprises a conductive sheet and a contact sheet which is arranged above the conductive sheet and is in contact with the conductive sheet, the conductive sheet comprises a common sheet and a gear switching sheet, the gear switching sheet comprises at least one gear sheet, and the common sheet is connected with the gear switching sheet. The end part of any gear piece is provided with an input terminal, the common piece is provided with an output terminal corresponding to the input terminal, the contact piece is provided with a first contact and a second contact, the first contact is in contact with the common piece, and the second contact can be in contact with any gear piece. And a first connecting part for punching an external stamping part is arranged between the adjacent gear sheets. The air volume switch can overcome the defects that in the prior art, metal sheets need to be manually placed for multiple times, and the production efficiency is low.

Description

Technical Field

[0001] This utility model relates to the field of air volume switch technology, specifically to an air volume switch. Background Technology

[0002] As a key component of a ventilation system, the air volume switch plays a crucial role in regulating and controlling airflow, ensuring indoor comfort, optimizing energy use, and protecting related equipment. Specifically, the air volume switch precisely adjusts the amount of air entering or exiting a space (such as a room, building, or equipment interior) according to actual needs. By opening and closing different settings, the air volume switch can flexibly respond to various ventilation requirements, ensuring that indoor airflow is neither excessive nor insufficient, thus creating a comfortable living or working environment. The air volume switch contains adjustable plates; during manufacturing, these plates need to be manually placed one by one onto a processing fixture before the outer casing is injection molded. This method requires multiple manual placements of the plates, resulting in low production efficiency. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to overcome the shortcomings of the prior art, which requires manual placement of metal sheets multiple times and has low production efficiency, thereby providing an air volume switch that can effectively improve production efficiency.

[0004] Therefore, this utility model provides a fan speed switch, including a housing and a conductive structure disposed inside the housing. The conductive structure includes a conductive sheet and a contact sheet disposed above and in contact with the conductive sheet. The conductive sheet includes a common sheet and a gear shifting sheet. The gear shifting sheet includes at least one gear shifting sheet. Each gear shifting sheet has an input terminal at its end. The common sheet has an output terminal corresponding to the input terminal. The contact sheet has a first contact and a second contact. The first contact contacts the common sheet, and the second contact can contact any gear shifting sheet. A first connecting portion is provided between adjacent gear shifting sheets for external stamping to break off.

[0005] Furthermore, the conductive structure also includes a grounding plate, and a second connection portion is provided between the common plate and the grounding plate for external stamping to break through. The contact plate is also provided with a third contact point that contacts the grounding plate.

[0006] Furthermore: the housing includes a base and a cover plate disposed on the base. The common plate, grounding plate and gear shifting plate are all injection molded in the base. A rotating rod is inserted into the cover plate. The contact plate is disposed on the rotating rod. An auxiliary structure for assisting the rotation of the rotating rod is provided between the base and the rotating rod.

[0007] Furthermore, the auxiliary structure includes a limiting post disposed on one side of the base or the rotating rod, and a limiting groove disposed on the other side and sleeved with the limiting post.

[0008] Furthermore: an abutment post is provided on the outer side of the rotating rod, and two positioning blocks are provided on the inner side wall of the cover plate to restrict the rotation path of the abutment post. A protrusion with the same number as the stop plate is provided between the two positioning blocks.

[0009] Furthermore: the base is provided with a rotating groove in an annular structure, and the rotating rod is provided with a limiting ring adapted to the rotating groove, the limiting ring being able to rotate within the rotating groove.

[0010] The technical solution of this utility model has the following advantages:

[0011] 1. This utility model provides a fan speed switch. During processing, a common plate and a speed-shifting plate are first placed on a processing fixture. Then, the housing, common plate, and speed-shifting plate are injection molded. Before injection molding, the first connecting part is cut off using a fixture, preventing the speed-shifting plates from connecting to each other and causing short circuits during use. In the prior art, metal plates need to be placed one by one on the processing fixture. In this embodiment, only one speed-shifting plate needs to be placed. Before injection molding, the connection between two adjacent speed-shifting plates, i.e., the first connecting part, is cut off, and the waste material of the first connecting part falls below the speed-shifting plate. Then, injection molding is performed, and the waste material is injected into the housing. This eliminates the need for additional waste cleaning, effectively improving production efficiency. The contact plate has a first contact and a second contact. During the rotation of the contact plate, the first contact is always in contact with the common plate, and the second contact is in contact with different speed-shifting plates, thereby realizing different speed levels of the fan speed switch.

[0012] 2. The present invention provides a fan speed switch, the conductive structure of which also includes a grounding plate. Before injection molding, the common plate and the grounding plate are the same metal plate. After being installed on the processing tooling equipment, the second connecting part is broken off by the stamping part on the tooling equipment. The contact plate has a third contact point. The third contact point is always in contact with the grounding plate during the rotation of the contact plate. The first contact point is always in contact with the common plate. There are four speed plates, including four speeds, namely speed one, speed two, speed three and speed four. When the second contact point is stopped at different speeds, the fan speed switch can be controlled to show different speeds of fan speed. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 A schematic diagram of the overall structure of the air volume switch;

[0015] Figure 2 This is a cross-sectional schematic diagram of the air volume switch;

[0016] Figure 3 This is a schematic diagram of the base structure;

[0017] Figure 4 This is a schematic diagram of the overall structure of the conductive structure.

[0018] Figure 5 This is a schematic diagram of the cover plate.

[0019] Figure 6 A schematic diagram showing the structure of the cover plate with the contact piece removed.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Housing; 11. Base; 12. Cover plate; 13. Limiting groove; 14. Limiting ring; 2. Conductive structure; 21. Conductive sheet; 211. Common sheet; 212. Gear shifting sheet; 223. Gear sheet; 22. Contact sheet; 23. First contact; 24. Second contact; 25. Third contact; 3. Input terminal; 31. Output terminal; 4. First connecting part; 5. Grounding sheet; 6. Second connecting part; 7. Rotating rod; 8. Auxiliary structure; 81. Limiting post; 82. Rotating groove; 83. Abutment post; 9. Positioning block; 91. Protrusion. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] Example

[0027] This embodiment provides a fan speed switch, including a housing 1 and a conductive structure 2 disposed inside the housing 1. The conductive structure 2 includes a conductive sheet 21 and a contact sheet 22 disposed above and in contact with the conductive sheet 21. The conductive sheet 21 includes a common sheet 211 and a gear shifting sheet 212. The gear shifting sheet 212 includes at least one gear shifting sheet 223. Each gear shifting sheet 223 has an input terminal 3 at its end. The common sheet 211 has an output terminal 31 corresponding to the input terminal 3. The contact sheet 22 has a first contact 23 and a second contact 24. The first contact 23 contacts the common sheet 211, and the second contact 24 can contact any gear shifting sheet 223. A first connecting portion 4 is provided between adjacent gear shifting sheets 223 for external stamping to break off.

[0028] The specific improvements mentioned above are as follows: Figures 1-3As shown, compared to existing technologies, during processing, the common piece 211 and the gear shift piece 212 can be placed on the processing fixture first. Then, the housing 1, the common piece 211, and the gear shift piece 212 are injection molded. Before injection molding, the first connecting part 4 is cut off using a fixture, and then injection molding is performed. This prevents the gear shift pieces 212 from connecting to each other and causing a short circuit during use. Furthermore, in existing technologies, the metal pieces (i.e., the gear shift piece 223 mentioned here) need to be placed one by one on the processing fixture, while in this embodiment, only one piece needs to be placed... Before injection molding, the connection between two adjacent gear shift pieces 223, namely the first connecting part 4, is broken off, and the waste material of the first connecting part 4 falls below the gear shift piece 223. Then, injection molding is performed, and the waste material is injected into the housing 1. This eliminates the need for additional waste cleaning and effectively improves production efficiency. The contact piece 22 has a first contact 23 and a second contact 24. During the rotation of the contact piece 22, the first contact 23 is always in contact with the common piece 211, and the second contact 24 is in contact with different gear shift pieces 223 to realize different gear shifts of air volume switching.

[0029] Based on the above embodiments: the conductive structure 2 further includes a grounding piece 5, and a second connecting part 6 for external stamping to break through is provided between the common piece 211 and the grounding piece 5. The contact piece 22 is also provided with a third contact point 25 that contacts the grounding piece 5.

[0030] The specific improvements mentioned above are as follows: Figures 3-5 As shown, the conductive structure 2 also includes a grounding piece 5. Before injection molding, the common piece 211 and the grounding piece 5 are the same metal piece. After being installed on the tooling equipment, the second connecting part 6 is broken off by the stamping part on the tooling equipment. The contact piece 22 has a third contact 25. The third contact 25 is always in contact with the grounding piece 5 during the rotation of the contact piece 22. The first contact 23 is always in contact with the common piece 211. There are four gear pieces 223, which include four gears, namely gear 1, gear 2, gear 3 and gear 4. When the second contact 24 is stopped at different gears, the air volume switch can be controlled to reflect different gear air volume.

[0031] Based on the above embodiments: the housing 1 includes a base 11 and a cover plate 12 disposed above the base 11. The common piece 211, the grounding piece 5 and the gear switching piece 212 are all injection molded on the base 11. A rotating rod 7 is inserted into the cover plate 12. The contact piece 22 is disposed on the rotating rod 7. An auxiliary structure 8 for assisting the rotation of the rotating rod 7 is disposed between the base 11 and the rotating rod 7.

[0032] The specific improvements mentioned above are as follows: Figure 1 and Figure 2 As shown, the housing 1 includes a base 11 and a cover plate 12 disposed on the base 11. The cover plate 12 has a groove for inserting the rotating rod 7. During installation, the contact piece 22 is first fixed on the rotating rod 7, then the top of the rotating rod 7 passes through the groove, and finally the cover plate 12 and the base 11 are snapped together and fixed.

[0033] Based on the above embodiments: the auxiliary structure 8 includes a limiting post 81 disposed on one side of the base 11 or the rotating rod 7, and a limiting groove 13 disposed on the other side and sleeved with the limiting post 81.

[0034] Based on the above embodiments: an abutment post 83 is provided on the outer side of the rotating rod 7, and two positioning blocks 9 are provided on the inner side wall of the cover plate 12 to limit the rotation path of the abutment post 83. A protrusion 91 with the same number as the stop plate 223 is provided between the two positioning blocks 9.

[0035] The specific improvements mentioned above are as follows: Figure 5 and Figure 6 As shown, the auxiliary structure 8 includes a limiting post 81 and a limiting groove 13. The contact piece 22 is engaged with the rotating rod 7. When the air volume switch is switching gears (that is, switching from gear 1 to gear 4 in sequence), the abutment post 83 always moves between the two positioning blocks 9. Four protrusions 91 are provided between the two positioning blocks 9. There is a downward recessed groove between the four protrusions 91. When the second contact 24 jumps from the first gear piece 223 to the second gear piece 223, the abutment post 83 will be embedded into the recessed groove between the first protrusion 91 and the second protrusion 91.

[0036] Based on the above embodiments: the base 11 is provided with a rotating groove 82 in an annular structure, and the rotating rod 7 is provided with a limiting ring 14 adapted to the rotating groove 82, and the limiting ring 14 can rotate within the rotating groove 82.

[0037] The specific improvement is as follows: In order to ensure that the rotating rod 7 is in the center of the conductive structure 2 and to prevent it from slipping during rotation, a limiting ring 14 and a rotating groove 82 adapted to the limiting ring 14 are provided between the rotating rod 7 and the conductive structure 2. During rotation, the limiting ring 14 will rotate within the rotating groove 82.

[0038] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A fan speed switch, characterized in that: The device includes a housing (1) and a conductive structure (2) disposed inside the housing (1). The conductive structure (2) includes a conductive sheet (21) and a contact sheet (22) disposed above the conductive sheet (21) and in contact with the conductive sheet (21). The conductive sheet (21) includes a common sheet (211) and a gear shifting sheet (212). The gear shifting sheet (212) includes at least one gear piece (223). An input terminal (3) is provided at the end of any gear piece (223). An output terminal (31) corresponding to the input terminal (3) is provided on the common sheet (211). A first contact (23) and a second contact (24) are provided on the contact sheet (22). The first contact (23) is in contact with the common sheet (211), and the second contact (24) can be in contact with any gear piece (223). A first connecting part (4) for external stamping is provided between adjacent gear pieces (223).

2. The airflow switch according to claim 1, characterized in that: The conductive structure (2) also includes a grounding plate (5), and there is a second connection part (6) between the common plate (211) and the grounding plate (5) for external stamping to break off. The contact plate (22) is also provided with a third contact point (25) that contacts the grounding plate (5).

3. A fan speed switch according to claim 1 or 2, characterized in that: The housing (1) includes a base (11) and a cover plate (12) disposed above the base (11). The common plate (211), the grounding plate (5) and the gear shifting plate (212) are all injection molded on the base (11). A rotating rod (7) is inserted into the cover plate (12). The contact plate (22) is disposed on the rotating rod (7). An auxiliary structure (8) for assisting the rotation of the rotating rod (7) is provided between the base (11) and the rotating rod (7).

4. The airflow switch according to claim 3, characterized in that: The auxiliary structure (8) includes a limiting post (81) disposed on one side of the base (11) or the rotating rod (7) and a limiting groove (13) disposed on the other side and sleeved with the limiting post (81).

5. The airflow switch according to claim 4, characterized in that: The rotating rod (7) is provided with an abutment post (83) on its outer side, and the inner side wall of the cover plate (12) is provided with two positioning blocks (9) for limiting the rotation path of the abutment post (83). The two positioning blocks (9) are provided with protrusions (91) in the same number as the stop plate (223).

6. The airflow switch according to claim 5, characterized in that: The base (11) is provided with a rotating groove (82) in a ring structure, and the rotating rod (7) is provided with a limiting ring (14) that is adapted to the rotating groove (82). The limiting ring (14) can rotate within the rotating groove (82).

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