Air volume switch and buckling mechanism of contact piece of air volume switch

Abstract

The utility model provides an air volume switch and a buckling mechanism of a contact piece thereof, which comprises a cover plate and a rotating rod penetrating through the cover plate, the rotating rod is provided with the contact piece, and a buckling structure is arranged between the rotating rod and the contact piece. The buckling structure comprises a buckling ring arranged on one side of the contact piece or the rotating rod and a buckling groove which is formed in the other side of the contact piece or the rotating rod and matched with the buckling ring, a spring is further arranged between the contact piece and the rotating rod, and at least two elastic buckles which are oppositely arranged are arranged on the buckling ring. The buckling structure can overcome the defects that in the prior art, due to the fact that manual welding is needed in a welding mode, the technical levels of workers are uneven, the contact piece is prone to inclining, the contact piece cannot make full contact with the metal piece, the contact piece cannot be clamped into the metal piece, and the contact piece cannot be clamped into the metal piece. And the product quality defect is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air volume switches, in particular to an air volume switch and a buckling mechanism of a contact piece thereof. Background Art

[0002] As a key component in the ventilation system, the air volume switch is responsible for regulating and controlling the amount of air flowing through it. It plays a vital role in maintaining indoor comfort, optimizing energy use, and protecting related equipment. Specifically, the air volume switch can precisely adjust the amount of air entering or exiting a space (such as a room, building, or equipment) based on actual needs. By opening or closing different gears, the air volume switch can flexibly respond to various ventilation needs, ensuring that indoor air circulation is neither excessive nor insufficient, thereby creating a pleasant living or working environment. The air volume switch is internally provided with a metal sheet and a contact sheet that contacts the metal sheet. The contact sheet is fixed to a rotating rod. By rotating the rotating rod, the contacts on the contact sheet contact different gear sheets to achieve gear switching. In the prior art, the contact sheet needs to be fixed to the rotating rod by welding. However, since welding requires manual welding and the workers' technical skills vary, it is easy for the contact sheet to tilt, resulting in the contact sheet not being able to fully contact the metal sheet, reducing product quality. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that welding needs to be done manually and the technical level of the workers is uneven, which easily causes the contact piece to tilt, resulting in the contact piece being unable to fully contact the metal piece and reducing product quality, thereby providing a wind volume switch and a contact piece buckle structure that can be quickly connected and enable the contact piece to fully contact the metal piece.

[0004] To this end, the utility model provides a fastening mechanism for a contact piece, comprising a cover plate and a rotating rod passing through the cover plate, the rotating rod being provided with a contact piece and a fastening structure being provided between the rotating rod and the contact piece, the fastening structure comprising a fastening ring provided on one side of the contact piece or the rotating rod and a fastening groove provided on the other side and adapted to the fastening ring, a spring being further provided between the contact piece and the rotating rod, the fastening ring being provided with at least two elastic clips arranged opposite to each other, and the elastic clips being provided with a guide slope for guiding the contact piece to snap in.

[0005] Furthermore: an extension ring is coaxially arranged on the outside of the rotating rod, and a accommodating space for accommodating a spring is arranged between the inner side surface of the extension ring and the outer side surface of the rotating rod, one end of the spring is abutted against the inner side surface of the extension ring, and the other end is abutted against the contact piece, and an abutment column is arranged on the extension ring, and two positioning blocks for limiting the rotation path of the abutment column are arranged on the inner side wall of the cover plate, and a number of protrusions equal to the number of gear pieces are arranged between the two positioning blocks.

[0006] Furthermore: the buckling ring is arranged on the rotating rod, the buckling groove is opened on the contact piece, and the contact piece is provided with an avoidance groove for avoiding the guide inclined surface.

[0007] A wind volume switch includes a base arranged below a cover plate and capable of being buckled with the cover plate, a conductive structure is arranged inside the base, the conductive structure includes a conductive plate that contacts a contact plate and can form a switch gear switch, the conductive plate includes a common plate and a gear switching plate, the gear switching plate includes at least one gear plate, an input terminal is provided at the end of any gear plate, an output terminal corresponding to the input terminal is provided on the common plate, a first contact and a second contact are provided on the contact plate, the first contact is in contact with the common plate, and the second contact can contact with any gear plate, and a first connecting portion for an external stamping part to break is provided between adjacent gear plates.

[0008] Furthermore: the conductive structure also includes a grounding plate, a second connecting portion for being punched out by an external stamping part is provided between the common plate and the grounding plate, and a third contact point for contacting the grounding plate is also provided on the contact plate.

[0009] Furthermore: the common plate, grounding plate and gear switching plate are all injection-molded at the base, the contact plate is arranged on the rotating rod, and an auxiliary structure for assisting the rotation of the rotating rod is arranged between the base and the rotating rod.

[0010] Furthermore: the auxiliary structure includes a limiting column arranged on one side of the base or the rotating rod and a limiting groove arranged on the other side and sleeved with the limiting column.

[0011] The technical solution of this utility model has the following advantages:

[0012] 1. The utility model provides a contact piece buckling structure. When installing the contact piece, the spring is first sleeved on the outside of the rotating rod, and then the buckling ring is snapped into the buckling groove to buckle the contact piece and the rotating rod together. The buckling is replaced with two elastic buckles arranged opposite to each other. When the contact piece is installed on the outside of the rotating rod, the two elastic buckles can ensure that the two sides of the contact piece are flush, avoiding the contact piece from tilting to any side after installation, resulting in the switch being unable to complete normal gear switching.

[0013] 2. The utility model provides a contact piece buckling structure, in which an extension ring is provided on the outside of the rotating rod, and a space for the spring to be clamped is formed between the inner side surface of the extension ring and the outer side surface of the rotating rod. Therefore, the upper end of the spring abuts against the inner side surface of the extension ring, and the other end abuts against the contact piece. When the air volume switch is switching gears, when the air volume switch is switching gears (that is, when switching from the first gear to the fourth gear in sequence), the abutment column always moves between the two positioning blocks, and four protrusions are provided between the two positioning blocks, and there is a downwardly concave sunken groove between the four protrusions. When the second contact jumps from the first gear piece to the second gear piece (at this time the spring is compressed), the abutment column will be embedded in the sunken groove between the first protrusion and the second protrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 Schematic diagram of the structure of the contact piece and the rotating rod;

[0016] Figure 2 It is a structural diagram of the cover plate, the rotating rod and the extension ring;

[0017] Figure 3 This is the overall structure diagram of the air volume switch;

[0018] Figure 4 This is a cross-sectional structural diagram of the air volume switch;

[0019] Figure 5 is a structural diagram of the base;

[0020] Figure 6 It is a structural diagram of the common plate and the gear shift plate.

[0021] Description of reference numerals:

[0022] 1. Cover plate; 2. Rotating rod; 3. Contact piece; 31. Spring; 32. First contact; 33. Second contact; 34. Third contact; 4. Snap-on structure; 41. Snap-on ring; 42. Snap-on groove; 43. Elastic buckle; 44. Avoidance groove; 5. Base; 6. Conductive sheet; 61. Common sheet; 62. Shift sheet; 63. Shift sheet; 64. Input terminal; 65. Output terminal; 66. Grounding sheet; 7. First connecting part; 71. Second connecting part; 8. Auxiliary structure; 81. Limiting column; 82. Limiting groove; 83. Abutting column; 84. Positioning block; 85. Protrusion; 9. Extension ring. DETAILED DESCRIPTION

[0023] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0024] 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 positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on 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.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] Example

[0028] This embodiment provides a contact piece fastening mechanism, including a cover plate 1 and a rotating rod 2 passing through the cover plate 1, a contact piece 3 is provided on the rotating rod 2, and a fastening structure 4 is provided between the rotating rod 2 and the contact piece 3, the fastening structure 4 includes a fastening ring 41 provided on one side of the contact piece 3 or the rotating rod 2 and a fastening groove 42 provided on the other side and adapted to the fastening ring 41, a spring 31 is further provided between the contact piece 3 and the rotating rod 2, the fastening ring 41 is provided with at least two elastic clips 43 arranged opposite to each other, and the elastic clip 43 is provided with a guide inclined surface for guiding the contact piece 3 to be snapped in.

[0029] The above specific improvements are: Figure 1 and Figure 2 As shown, when installing the contact piece 3, first put the spring 31 on the outside of the rotating rod 2, and then snap the buckle ring 41 into the buckle groove 42 to buckle the contact piece 3 and the rotating rod 2 together, and replace the buckle with two elastic buckles 43 set opposite to each other. When the contact piece 3 is installed to the outside of the rotating rod 2, the two elastic buckles 43 can ensure that the two sides of the contact piece 3 are flush, avoiding the contact piece 3 tilting to any side after installation, resulting in the switch being unable to complete normal gear switching.

[0030] On the basis of the above embodiment: an extension ring 9 is coaxially provided on the outside of the rotating rod 2, and an accommodating space for accommodating a spring 31 is provided between the inner side surface of the extension ring 9 and the outer side surface of the rotating rod 2. One end of the spring 31 is against the inner side surface of the extension ring 9, and the other end is against the contact piece 3. An abutment column 83 is provided on the extension ring 9, and two positioning blocks 84 for limiting the rotation path of the abutment column 83 are provided on the inner side wall of the cover plate 1. A number of protrusions 85, the same as the number of the gear pieces 63, are provided between the two positioning blocks 84.

[0031] The above specific improvements are: Figure 2 As shown, an extension ring 9 is provided on the outside of the rotating rod 2, and a space for the spring 31 to be inserted is formed between the inner side of the extension ring 9 and the outer side of the rotating rod 2. Therefore, the upper end of the spring 31 abuts against the inner side of the extension ring 9, and the other end abuts against the contact piece 3. When the air volume switch is switching gears, when the air volume switch is switching gears (that is, when switching from the first gear to the fourth gear in sequence), the abutment column 83 always moves between the two positioning blocks 84. Four protrusions 85 are provided between the two positioning blocks 84, and there is a downwardly concave sunken groove between the four protrusions 85. When the second contact 33 jumps from the first gear piece 63 to the second gear piece 63 (at this time the spring 31 is compressed), the abutment column 83 will be embedded in the sunken groove between the first protrusion 85 and the second protrusion 85 (at this time the spring 31 releases its elastic potential energy).

[0032] On the basis of the above embodiment: the buckling ring 41 is provided on the rotating rod 2, the buckling groove 42 is opened on the contact piece 3, and the contact piece 3 is provided with an avoidance groove 44 for avoiding the guide inclined surface.

[0033] The above specific improvements are: Figure 2 As shown, the buckling ring 41 is opened on the rotating rod 2, and the buckling groove 42 is opened on the contact piece 3. In order to enable the contact piece 3 to be quickly and conveniently clamped on the rotating rod 2, the buckling ring 41 is avoided by the avoidance groove 44. During installation, the operator only needs to align the guide slope with the avoidance groove 44, and then press it lightly to make the elastic buckle 43 shrink inward from both sides. When the contact piece 3 exceeds the limit of the elastic buckle 43, the elastic buckle 43 restores its elastic potential energy, so that the contact piece 3 is clamped in the rotating rod 2, and the upper end face of the contact piece 3 will contact the lower end face of the extension ring 9, thereby further avoiding the contact piece 3 from tilting when switching gears.

[0034] A wind volume switch includes a base 5 arranged below a cover plate 1 and capable of being buckled with the cover plate 1, wherein a conductive structure is arranged inside the base 5, wherein the conductive structure includes a conductive plate 6 that contacts the contact plate 3 and can form a switch gear switching, wherein the conductive plate 6 includes a common plate 61 and a gear switching plate 62, wherein the gear switching plate 62 includes at least one gear plate 63, and an input terminal 64 is provided at the end of any gear plate 63, and an output terminal 65 corresponding to the input terminal 64 is provided on the common plate 61, and a first contact 32 and a second contact 33 are provided on the contact plate 3, wherein the first contact 32 contacts the common plate 61, and the second contact 33 can contact any gear plate 63, and a first connecting portion 7 for an external stamping part to break is provided between adjacent gear plates 63.

[0035] The above specific improvements are: Figure 3-Figure 5As shown, the air volume switch includes a conductive structure inside. During processing, the common piece 61 and the gear switching piece 62 can be placed on the processing tooling first, and then the shell and the common piece 61 and the gear switching piece 62 are injection molded. Before completing the injection molding, the first connecting part 7 is cut off by the tooling equipment, and then injection molding is performed, so that the gear switching pieces 62 will no longer be connected to each other and cause the switch short circuit during use. In the prior art, it is necessary to place the metal pieces (that is, the gear pieces 63 mentioned here) one by one on the processing tooling, but in this embodiment, it is only necessary to place A gear switching piece 62 is placed. Before injection molding, the connection between two adjacent gear pieces 63, that is, the first connecting part 7, is cut off, and the waste material of the first connecting part 7 will fall under the gear piece 63, and then injection molding is performed. During injection molding, the waste material will be injected into the inside of the shell, so there is no need to clean up the waste material additionally, which effectively improves production efficiency. The contact piece 3 has a first contact 32 and a second contact 33. During the rotation of the contact piece 3, the first contact 32 is always in contact with the common piece 61, and the second contact 33 is in contact with different gear pieces 63 to realize different gears of the air volume switch.

[0036] Based on the above embodiment: the conductive structure further includes a grounding plate 66, a second connecting portion 71 for external stamping parts to break is provided between the common plate 61 and the grounding plate 66, and a third contact point 34 in contact with the grounding plate 66 is further provided on the contact plate 3.

[0037] The above specific improvements are: Figure 6 As shown, the conductive structure also includes a grounding plate 66. The common plate 61 and the grounding plate 66 are the same metal plate before injection molding. After being installed on the processing tooling equipment, the second connecting part 71 is cut off by the stamping parts on the tooling equipment. The contact plate 3 has a third contact 34. The third contact 34 is always in contact with the grounding plate 66 during the rotation of the contact plate 3. The first contact 32 is always in contact with the common plate 61. The gear plate 63 has four plates, which include four gears, namely gear one, gear two, gear three and gear four. When the second contact 33 stays at different gears, it can control the air volume switch to reflect different gear air volumes.

[0038] Based on the above embodiment: the common plate 61, the grounding plate 66 and the gear switching plate 62 are all injection molded at the base 5, the contact plate 3 is arranged on the rotating rod 2, and an auxiliary structure 8 for assisting the rotation of the rotating rod 2 is provided between the base 5 and the rotating rod 2.

[0039] On the basis of the above embodiment, the auxiliary structure 8 includes a limiting column 81 provided on one side of the base 5 or the rotating rod 2 and a limiting groove 82 provided on the other side and sleeved with the limiting column 81 .

[0040] The above-mentioned specific improvements are as follows: there is a groove on the cover plate 1 for the rotating rod 2 to be inserted. During installation, the contact piece 3 is first fixed on the rotating rod 2, and then the top of the rotating rod 2 is passed through the groove, and finally the cover plate 1 and the base 5 are clamped and fixed. The auxiliary structure 8 includes a limit column 81 and a limit groove 82. The contact piece 3 is clamped on the rotating rod 2. When the air volume switch is switching gears (that is, when switching from the first gear to the fourth gear in sequence), the abutment column 83 always moves between the two positioning blocks 84. Four protrusions 85 are set between the two positioning blocks 84. There is a downwardly concave sunken groove between the four protrusions 85. When the second contact 33 jumps from the first gear piece 63 to the second gear piece 63, the abutment column 83 will be embedded in the sunken groove between the first protrusion 85 and the second protrusion 85.

[0041] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A contact piece fastening mechanism, characterized in that: The invention comprises a cover plate (1) and a rotating rod (2) passing through the cover plate (1); a contact piece (3) is provided on the rotating rod (2); and a buckling structure (4) is provided between the rotating rod (2) and the contact piece (3); the buckling structure (4) comprises a buckling ring (41) provided on one side of the contact piece (3) or the rotating rod (2) and a buckling groove (42) provided on the other side and adapted to the buckling ring (41); a spring (31) is further provided between the contact piece (3) and the rotating rod (2); the buckling ring (41) is provided with at least two elastic buckles (43) arranged facing each other; and the elastic buckle (43) is provided with a guide inclined surface for guiding the contact piece (3) to be buckled in.

2. The contact piece fastening mechanism according to claim 1, characterized in that: An extension ring (9) is coaxially arranged on the outside of the rotating rod (2); an accommodating space for accommodating a spring (31) is arranged between the inner side surface of the extension ring (9) and the outer side surface of the rotating rod (2); one end of the spring (31) abuts against the inner side surface of the extension ring (9), and the other end abuts against the contact piece (3); an abutting column (83) is arranged on the extension ring (9); two positioning blocks (84) for limiting the rotation path of the abutting column (83) are arranged on the inner side wall of the cover plate (1); and a number of protrusions (85) equal to the number of the shift piece (63) is arranged between the two positioning blocks (84).

3. The contact piece fastening mechanism according to claim 2, characterized in that: The buckle ring (41) is arranged on the rotating rod (2), the buckle groove (42) is opened on the contact piece (3), and the contact piece (3) is provided with an avoidance groove (44) for avoiding the guide inclined surface.

4. An air volume switch, characterized in that: A contact piece fastening mechanism comprising a contact piece according to any one of claims 1 to 3, comprising a base (5) arranged below a cover plate (1) and capable of being fastened to the cover plate (1), wherein a conductive structure is arranged inside the base (5), wherein the conductive structure comprises a conductive piece (6) in contact with the contact piece (3) and capable of forming a switch gear switch, wherein the conductive piece (6) comprises a common piece (61) and a gear switching piece (62), wherein the gear switching piece (62) comprises at least one gear piece (63), wherein the conductive piece (61 ... An input terminal (64) is provided at the end of any gear piece (63); an output terminal (65) corresponding to the input terminal (64) is provided on the common piece (61); a first contact point (32) and a second contact point (33) are provided on the contact piece (3); the first contact point (32) contacts the common piece (61); the second contact point (33) can contact any gear piece (63); and a first connecting portion (7) for being punched out by an external stamping part is provided between adjacent gear pieces (63).

5. The air volume switch according to claim 4, characterized in that: The conductive structure further includes a grounding plate (66), a second connecting portion (71) for being punched out by an external punching part is provided between the common plate (61) and the grounding plate (66), and a third contact point (34) in contact with the grounding plate (66) is also provided on the contact plate (3).

6. The air volume switch according to claim 5, characterized in that: The common plate (61), the grounding plate (66) and the gear switching plate (62) are all injection-molded on the base (5); the contact plate (3) is arranged on the rotating rod (2); and an auxiliary structure (8) for assisting the rotating rod (2) in rotating is provided between the base (5) and the rotating rod (2).

7. The air volume switch according to claim 6, characterized in that: The auxiliary structure (8) comprises a limiting column (81) arranged on one side of the base (5) or the rotating rod (2) and a limiting groove (82) arranged on the other side and sleeved with the limiting column (81).

Images