A key switch exhaust control component

Abstract

The present invention relates to a key switch exhaust control component, which includes a switch housing and an exhaust pipe. A cover plate and a driving motor are provided on the exhaust pipe. A conductive sheet and a motor switch sheet are provided inside the switch housing. A plurality of gear switches are provided on the switch housing. A first return spring is provided between the gear switch and the switch housing. The technical key point is that a linkage piece is provided inside the switch housing, which is driven to move by the gear switch when the gear switch is pressed, and drives the conductive sheet and the motor switch sheet to be electrically connected. A lock piece assembly that can lock the gear switch when the gear switch is pressed, a blocking piece that is pushed and moved by the gear switch to lock other gear switches when one of the gear switches is pressed, and a power switch that pushes the lock piece assembly to unlock the gear switch when pressed are also provided inside the switch housing. A second return spring is provided between the power switch and the switch housing. A third return spring for elastically pressing the linkage piece to reset is provided inside the switch housing. The present invention is simple and convenient to control.

Description

Technical Field

[0001] The present invention relates to a switch assembly on an oil fume extractor.

Background Art

[0002] When we cook in the kitchen, we often encounter the situation that when the range hood is working, the negative pressure in the kitchen is too large and no air enters, resulting in the range hood working smoothly and the motor temperature rising too high, burning out the motor, which greatly shortens the service life of the range hood. Some of the existing range hoods are equipped with exhaust fans to exhaust indoor air to the outside, but they are all independently controlled and are often forgotten to be turned on, making them very inconvenient to use.

Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a simple-structured and convenient-to-control key switch exhaust control assembly.

[0004] To solve the above problems, the present invention adopts the following technical solutions:

[0005] A key switch exhaust control assembly includes a switch housing and an exhaust pipe. A cover plate capable of closing the inside of the exhaust pipe is hinged on the exhaust pipe. A driving motor for driving the cover plate to rotate to open or close the inside of the exhaust pipe is provided on the exhaust pipe. A first return spring is provided between the gear switch and the switch housing. A conductive sheet and a motor switch sheet electrically connected to the driving motor are provided inside the switch housing. A plurality of gear switches with one end inserted into the housing and electrically connected to the conductive sheet after being pressed are provided on the switch housing. It is characterized in that: a linkage piece driven by the gear switch to move when the gear switch is pressed and driving the motor switch sheet to be electrically connected to the conductive sheet is provided inside the switch housing. A lock piece assembly for locking the gear switch when the gear switch is pressed, a blocking piece for locking other gear switches by being pushed and moved by the gear switch when one of the gear switches is pressed, and a power switch for pushing the lock piece assembly to unlock the gear switch after being pressed are also provided inside the switch housing. A second return spring is provided between the power switch and the switch housing. A third return spring for elastically pressing the linkage piece to reset is provided inside the switch housing.

[0006] A key switch exhaust control assembly as described above is characterized in that: the lock piece assembly includes a lock piece. A plurality of lock piece notches are provided on the lock piece. A first boss propping against the bottom surface of the lock piece is provided on the gear switch. A first inclined surface pressing against one side of the lock piece notch is provided on the first boss. The lock piece assembly further includes a lock piece return spring for elastically pressing the lock piece to move when the first boss moves downward away from the lock piece notch so that the bottom surface of the lock piece is located above the first boss.

[0007] A key switch exhaust control assembly as described above is characterized in that: a blocking piece notch is provided on the linkage piece. A fourth inclined surface pressing against the blocking piece notch is provided on the gear switch.

[0008] A piano key switch exhaust control assembly as described above is characterized in that: the gear switch is provided with a second boss that can be blocked by a baffle and move downward, the second boss is provided with a second inclined surface, and the baffle is provided with a baffle inclined surface that can abut against the second inclined surface.

[0009] The piano key switch exhaust control assembly as described above is characterized in that: the conductive sheet is provided with a first switch sheet that can be conductively connected to the motor switch sheet, and the linkage sheet is provided with a linkage paddle that, when the linkage sheet is pushed and moved, drives the motor switch sheet to contact the first switch sheet.

[0010] A piano key switch exhaust control assembly as described above is characterized in that: a second switch sheet is provided on the conductive sheet, a receiving groove is provided in the gear switch, a gear switch sheet is provided in the receiving groove which is in conductive contact with the second switch sheet when the gear switch is pressed down, and an elastic member is also provided in the receiving groove which presses the gear switch sheet against the inner wall of the receiving groove.

[0011] The piano key switch exhaust control assembly as described above is characterized in that: a third boss is provided on the power switch, and a third inclined surface is provided on the third boss for squeezing and unlocking the gear switch when the power switch is downward.

[0012] The piano key switch exhaust control assembly as described above is characterized in that: the cover plate is provided with a rotating shaft plugged into the motor shaft of the driving motor, the rotating shaft is provided with a first stopper and a second stopper, the exhaust pipe is provided with a blocking portion outside to block the first stopper and the second stopper, and the exhaust pipe is provided with a tension spring to force the rotating shaft to rotate and reset.

[0013] The beneficial effects of the present invention are as follows: the conductive sheet is connected to the power supply, and after the gear switch is pressed, it is conductively connected to the conductive sheet to form a loop, so that the range hood can enter different gears, such as low gear, medium gear, and high gear. After the gear switch is pressed, the conductive sheet is driven to be conductively connected to the motor switch sheet, and the drive motor is connected to the power supply and started, driving the cover sheet to rotate, and the exhaust pipe is in an open state to facilitate exhaust, thereby realizing linkage control. By designing the baffle, when one of the gear switches is pressed, the baffle is pushed and moved to the bottom of the other gear switches to block the other gear switches and prevent the gear switches from being pressed at the same time. The structure is simple and easy to use.

Brief Description of the Drawings

[0014] Figure 1 A perspective view of the present invention;

[0015] Figure 2 An exploded view of the switch housing of the present invention;

[0016] Figure 3Front view of the component of the switch housing of the present invention;

[0017] Figure 4 Stereogram of the component of the switch housing of the present invention;

[0018] Figure 5 Exploded view of the exhaust pipe of the present invention.

Detailed implementation manners

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners:

[0020] As Figures 1 to 5As shown in the figure, a key switch exhaust control component includes a switch housing 1 and an exhaust pipe 11. A cover plate 12 that can close the inside of the exhaust pipe 11 is hinged on the exhaust pipe 11. A driving motor 13 for driving the cover plate 12 to rotate to open or close the inside of the exhaust pipe 11 is provided on the exhaust pipe 11. The exhaust pipe 11 is circular tubular, and the cover plate 12 is circular, with a diameter slightly smaller than the inner diameter of the exhaust pipe 11. When the cover plate 12 is horizontal, the exhaust pipe 11 is in a closed state, and when the exhaust pipe 11 is vertical, the exhaust pipe 11 is in the maximum open state. A rotating shaft 16 inserted into the motor shaft of the driving motor 13 is provided on the cover plate 12. A first anti-rotation portion 17 and a second anti-rotation portion 18 are provided on the rotating shaft 16. A blocking portion 19 for blocking the first anti-rotation portion 17 and the second anti-rotation portion 18 is provided outside the exhaust pipe 11. After the driving motor 13 operates, when the exhaust pipe 11 is in the maximum open state, the second anti-rotation portion 18 is blocked by the blocking portion 19; after the driving motor 13 rotates in the reverse direction, when the exhaust pipe 11 is in the closed state, the blocking portion 19 blocks the first anti-rotation portion 17. A tension spring 20 for elastically pressing the rotating shaft 16 to rotate back to its original position is provided on the exhaust pipe 11. After power-off, the tension spring 20 rotates the rotating shaft 16 back to its original position. One end of the tension spring 20 is on the exhaust pipe 11, and the other end is fixed at a position deviating from the rotation center on the rotating shaft 16, and the exhaust pipe 11 is in the closed state. A conductive sheet 5 and a motor switch sheet 50 electrically connected to the driving motor 13 are provided inside the switch housing 1. The motor switch sheet 50 is electrically connected to the driving motor 13 through a wire. The conductive sheet 5 is connected to the power supply. After the motor switch sheet 50 contacts the conductive sheet 5, the driving motor 13 is connected to the power supply and starts. A plurality of gear switches 3 with one end inserted into the housing 1 and capable of being electrically connected to the conductive sheet 5 after being pressed are provided on the switch housing 1. The conductive part of the gear switch 3 is connected to the external circuit. When the gear switch 3 is connected to the conductive sheet 5, the circuit part starts to control the start of the range hood. In this embodiment, there are three gear switches 3, namely low gear, medium gear, and high gear. A first return spring 4 is provided between the gear switch 3 and the switch housing 1. Each gear switch 3 is correspondingly provided with a first return spring 4, and the first return spring 4 bounces up the pressed gear switch 3. A linkage piece 6 that is driven to move by the gear switch 3 when the gear switch 3 is pressed and drives the conductive sheet 5 to be electrically connected to the motor switch sheet 50 is provided inside the switch housing 1. After the linkage piece 6 is extruded and moves, the linkage piece 6 toggles the conductive sheet 5 to make the motor switch sheet 50 contact the conductive sheet 5. A lock piece assembly 7 that can lock the gear switch 3 when the gear switch 3 is pressed, a blocking piece 8 that is pushed by the gear switch 3 to move and lock other gear switches 3 when one of the gear switches 3 is pressed, and a power switch 2 that unlocks the gear switch 3 by pushing the lock piece assembly 7 after being pressed are also provided inside the switch housing 1. After the power switch 2 is pressed, the pressed gear switch 3 is reset. A second return spring 14 is provided between the power switch 2 and the switch housing 1, and the second return spring 14 bounces up the power switch 2. A third return spring 15 for elastically pressing the linkage piece 6 to reset is provided inside the switch housing 1. After the linkage piece 6 is squeezed by the gear switch 3, it is elastically pressed and reset by the third return spring 15.

[0021] The lock piece assembly 7 includes a lock piece 71, and a plurality of lock piece notches 72 are provided on the lock piece 71. A first boss 31 that abuts against the bottom surface of the lock piece 71 is provided on the gear shift switch 3. A first inclined surface 32 that presses against one side of the lock piece notch 72 is provided on the first boss 31. Due to the inclined setting of the first inclined surface 32, when the gear shift switch 3 moves vertically, it squeezes and pushes the lock piece 71 to move horizontally. The lock piece assembly 7 further includes a lock piece return spring 73 that elastically presses the lock piece 71 to move when the first boss 31 moves downward away from the lock piece notch 72, so that the bottom surface of the lock piece 71 is located above the first boss 31. When the gear shift switch 3 continues to move vertically and the first boss 31 disengages from the lock piece notch 72, the lock piece return spring 73 elastically presses the lock piece 71 to reset. At this time, the bottom surface of the lock piece 71 is above the first boss 31. Under the action of the first return spring 4, the top surface of the first boss 31 presses against the bottom surface of the lock piece 71, preventing the gear shift switch 3 from resetting upward. A retaining piece notch 61 is provided on the linkage piece 6. A fourth inclined surface 30 that presses against the retaining piece notch 61 is provided on the gear shift switch 3. The linkage piece 6 also moves horizontally through the squeezing action of the fourth inclined surface 30. The first inclined surface 32 and the fourth inclined surface 30 are symmetrically arranged about the center of the gear shift switch 3.

[0022] The gear shift switch 3 is provided with a second boss 33 that can be blocked from moving downward by the retaining piece 8. A second inclined surface 34 is provided on the second boss 33. The retaining piece 8 is provided with a retaining piece inclined surface 81 that can abut against the second inclined surface 34. When the retaining piece inclined surface 81 and the second inclined surface 34 are in abutment, the pressed gear shift switch 3 moves downward through the action of the inclined surface, causing the retaining piece 8 to move horizontally. After the retaining piece 8 moves horizontally, it will be located below the second boss 33 of the gear shift switch 3 that is not pressed. At this time, if other gear shift switches 3 are pressed, the second boss 33 will be blocked by the retaining piece 8 and cannot continue to move downward. In this embodiment, there are three gear shift switches 3 and two retaining pieces 8. Each retaining piece 8 has two retaining piece inclined surfaces 81. The middle gear shift switch 3 is located between the two retaining pieces 8 and has two second inclined surfaces 34. When the middle gear shift switch 3 is pressed, both retaining pieces 8 are squeezed and pushed to move to the left and right sides. The power switch 2 is provided with a third boss 21. A third inclined surface 22 that squeezes and pushes the lock piece assembly 7 to unlock the gear shift switch 3 when the power switch 2 moves downward is provided on the third boss 21. The third inclined surface 22 abuts against the edge of the lock piece assembly 7 and squeezes and pushes the lock piece assembly 7 to move horizontally through the action of the inclined surface. After the lock piece assembly 7 moves horizontally, the lock piece assembly 7 is released from the locked state and no longer blocks the gear shift switch 3. The gear shift switch 3 resets under the action of the first return spring 4.

[0023] The conductive sheet 5 is provided with a first switch sheet 51 which can be electrically connected to the motor switch sheet 50. The first switch sheet 51 is an elastic sheet. The linkage sheet 6 is provided with a linkage paddle 62 which, when the linkage sheet 6 is pushed and moved, paddles the first switch sheet 51 to contact the motor switch sheet 50. The linkage paddle 62 paddles the first switch sheet 51 to elastically deform, so that the first switch sheet 51 is bent toward the motor switch sheet 50 and contacts. The conductive sheet 5 is provided with a second switch sheet 52. The gear switch 3 is provided with a receiving groove 35. The receiving groove 35 is provided with a gear switch sheet 36 which is electrically connected to the second switch sheet 52 when the gear switch 3 is pressed down. One end of the gear switch sheet 36 extends out of the switch housing 1 and is connected to an external control circuit. The receiving groove 35 is also provided with an elastic member 37 which presses the gear switch sheet 36 against the inner wall of the receiving groove 35. The elastic member 37 can prevent the second switch sheet 52 from hard collision with the second switch sheet 52. Existing range hoods generally have a lighting function. A lighting switch may be provided on the switch housing 1 , which contacts the conductive sheet 5 when pressed to control the lighting.

Claims

1. A key switch exhaust control assembly, comprising a switch housing (1) and an exhaust pipe (11). A cover plate (12) is hinged on the exhaust pipe (11) and can close the inside of the exhaust pipe (11). A driving motor (13) for driving the cover plate (12) to rotate to open or close the inside of the exhaust pipe (11) is provided on the exhaust pipe (11). A conductive sheet (5) and a motor switch sheet (50) electrically connected to the driving motor (13) are arranged inside the switch housing (1). A plurality of gear switches (3) are provided on the switch housing (1), one end of each of which is inserted into the housing (1) and can be electrically connected to the conductive sheet (5) after being pressed. A first return spring (4) is arranged between the gear switch (3) and the switch housing (1). Characterized in that: A linkage piece (6) is arranged inside the switch housing (1). After the gear switch (3) is pressed, the gear switch (3) drives the linkage piece (6) to move, thereby driving the conductive sheet (5) to be electrically connected to the motor switch sheet (50). A lock piece assembly (7) for locking the gear switch (3) after the gear switch (3) is pressed, a blocking piece (8) for pushing and moving to lock other gear switches (3) after one of the gear switches (3) is pressed, and a power switch (2) for pushing the lock piece assembly (7) to unlock the gear switch (3) after being pressed are also arranged inside the switch housing (1). A second return spring (14) is arranged between the power switch (2) and the switch housing (1). A third return spring (15) for elastically pressing the linkage piece (6) to reset is arranged inside the switch housing (1).

2. A key switch exhaust control assembly according to claim 1, Characterized in that: The lock piece assembly (7) includes a lock piece (71). A plurality of lock piece notches (72) are arranged on the lock piece (71). A first boss (31) capable of abutting against the bottom surface of the lock piece (71) is arranged on the gear switch (3). A first inclined surface (32) pressing against one side of the lock piece notch (72) is arranged on the first boss (31). The lock piece assembly (7) further includes a lock piece return spring (73) for elastically pressing the lock piece (71) to move when the first boss (31) moves downward away from the lock piece notch (72), so that the bottom surface of the lock piece (71) is located above the first boss (31).

3. A key switch exhaust control assembly according to claim 1, Characterized in that: A blocking piece notch (61) is arranged on the linkage piece (6). A fourth inclined surface (30) pressing against the blocking piece notch (61) is arranged on the gear switch (3).

4. A key switch exhaust control assembly according to claim 1, Characterized in that: A second boss (33) capable of being blocked by the blocking piece (8) from moving downward is arranged on the gear switch (3). A second inclined surface (34) is arranged on the second boss (33). A blocking piece inclined surface (81) capable of abutting against the second inclined surface (34) is arranged on the blocking piece (8).

5. A key switch exhaust control assembly according to claim 1, Characterized in that: The conductive sheet (5) is provided with a first switch sheet (51) that can be conductively connected to the motor switch sheet (50), and the linkage sheet (6) is provided with a linkage paddle (62) that can move the motor switch sheet (50) into contact with the first switch sheet (51) when the linkage sheet (6) is pushed and moved.

6. A piano key switch exhaust control assembly according to claim 1, Features: A second switch sheet (52) is provided on the conductive sheet (5), a receiving groove (35) is provided in the gear switch (3), a gear switch sheet (36) is provided in the receiving groove (35) and is in conductive contact with the second switch sheet (52) when the gear switch (3) is pressed down, and an elastic member (37) is also provided in the receiving groove (35) for pressing the gear switch sheet (36) against the inner wall of the receiving groove (35).

7. A piano key switch exhaust control assembly according to claim 1, Features: The power switch (2) is provided with a third boss (21), and the third boss (21) is provided with a third inclined surface (22) for pushing the gear switch (3) to unlock when the power switch (2) is turned downward.

8. A piano key switch exhaust control assembly according to claim 1, Features: The cover plate (12) is provided with a rotating shaft (16) plugged into the motor shaft of the driving motor (13), the rotating shaft (16) is provided with a first stopper (17) and a second stopper (18), the exhaust pipe (11) is provided with a blocking portion (19) outside the exhaust pipe (11) for blocking the first stopper (17) and the second stopper (18), and the exhaust pipe (11) is provided with a tension spring (20) for pressing the rotating shaft (16) to rotate and reset.

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