A reliable timer

Abstract

The present invention discloses a reliable timer, comprising a housing, a rotating shaft, a rotating disk, a gear set, a power mechanism, a shift lever and an interference assembly; wherein, the timer further comprises a first elastic member arranged between the shift lever and the housing and a second elastic member arranged between the rotating plate and the housing; when the rotating disk is in a positioning position, the shift lever overcomes the elastic force of the first elastic member and rotates and disengages from the rotating plate, and the rotating plate rotates and disengages from the gear set under the elastic force of the second elastic member; when the rotating disk is in a disconnected position, the first elastic member releases the elastic force and drives the shift lever to abut against the rotating plate, thereby driving the rotating plate to overcome the elastic force of the second elastic member and rotate and interfere with the gear set. Therefore, by arranging a first elastic member between the lever and the shell, when the turntable is in the positioning position, the first elastic member is compressed and stores elastic potential energy; when the turntable is in the disconnected position, the first elastic member releases the elastic force and drives the lever to rotate, thereby increasing the force acting on the lever, and then ensuring that the lever can smoothly trigger the interference component, making it more stable and reliable; secondly, by arranging a second elastic member between the shell and the rotating plate, the second elastic member can constrain the rotation of the rotating plate, thereby preventing it from rotating due to external disturbances, and thus there is no need to set an additional block like a traditional rotating plate, thereby simplifying the structure of the rotating plate, reducing processing difficulty, improving processing efficiency, and reducing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a reliable positioner. Background Art

[0002] This section only provides background information related to the present application to help those skilled in the art understand the present application more thoroughly and accurately, and it is not necessarily prior art.

[0003] Currently, timers are widely used in various household appliances and are well known to the public. Application No. 202121073953.2 discloses a timer comprising a rotating shaft, a gear train, a power mechanism, a turntable, a lever, and an interference assembly. The turntable has a timing position and an off position set on its periphery. When the turntable is in the timing position, the lever does not trigger the interference assembly; when the turntable is in the off position, the lever triggers the interference assembly. The interference assembly includes a rotating plate that cooperates with the lever.

[0004] In addition, it also includes a household appliance switch, which includes a fixed elastic piece and a dynamic elastic piece. The dynamic elastic piece is in contact with the dial rod. When the turntable is in the disconnected position, the dial rod can be driven to rotate under the elastic force of the dynamic elastic piece, and then the rotating plate is driven to rotate through the dial rod to achieve interference; in addition, a block is also provided on the rotating plate. When the rotating plate is not touched by the dial rod and due to external disturbance, the upper block of the block contacts the gear set, causing the rotating plate to rotate, but the other block of the rotating plate after rotation will interfere with the gear set, causing the rotating plate to rebound and rotate in the opposite direction, so that the rotating plate must be triggered by the dial rod, thereby ensuring interference with the gear set, thereby ensuring stable operation of the timer.

[0005] However, during the use of the above-mentioned products, it was found that: first, when the turntable is in the disconnected position, since the lever can only be driven by the dynamic spring to achieve rotation, and the elastic force of the dynamic spring is relatively small, when the lever deflects to a certain position and generates a certain friction resistance, the dynamic spring may not be able to drive the rotating plate to rotate through the lever, thereby failing to trigger the interference component; in addition, since the specifications of most dynamic springs are uniform, it is also troublesome to increase the elastic force on the dynamic spring; secondly, since there is no elastic structure on the rotating plate to constrain its movement, it is easily affected by external disturbances and rotates; therefore, merchants need to set two blocks on the rotating plate, which not only makes the structure complicated, but also has certain requirements for processing accuracy, thereby reducing efficiency and increasing costs. Summary of the Invention

[0006] In order to overcome the defects of the above-mentioned prior art, the present invention provides a reliable timer. A first elastic member is arranged between the dial rod and the shell. When the turntable is in the positioning position, the first elastic member is compressed and stores elastic potential energy. When the turntable is in the disconnected position, the first elastic member releases the elastic force and drives the dial rod to rotate, thereby increasing the force acting on the dial rod, thereby ensuring that the dial rod can smoothly trigger the interference component, making its structure more stable and reliable; secondly, a second elastic member is arranged between the shell and the rotating plate. The second elastic member can constrain the rotation of the rotating plate, thereby preventing it from rotating due to external disturbances. Therefore, it is necessary to set an additional block on the rotating plate, thereby simplifying the structure of the rotating plate, reducing processing difficulty, improving processing efficiency, and reducing costs.

[0007] The technical solution adopted by the present invention to solve the problem is:

[0008] A reliable timer comprising:

[0009] a housing having an accommodating cavity formed therein;

[0010] A rotating shaft is provided on the housing and partially extends into the accommodating cavity; the portion of the rotating shaft extending outside the housing forms an operating portion operable by a user;

[0011] A turntable is sleeved on the rotating shaft and located in the accommodating cavity; the turntable rotates synchronously with the rotating shaft; and a timing position and a disconnection position are provided on the turntable;

[0012] a gear set, which is disposed in the accommodating cavity and rotates in mesh with the rotating shaft;

[0013] a power mechanism, which provides rotational force for the gear set;

[0014] A shift lever is rotatably mounted on the housing and located within the accommodating cavity; the shift lever is in transmission engagement with the rotating shaft;

[0015] An interference assembly is disposed in the accommodating cavity; the interference assembly includes a rotating plate disposed on the housing for interfering with the gear set and rotating the plate; the shift lever is in transmission engagement with the rotating plate; when the turntable is in the positioning position, the shift lever is disengaged from the rotating plate, and the rotating plate does not interfere with the gear set; when the turntable is in the disconnected position, the shift lever drives the rotating plate to rotate and interfere with the gear set;

[0016] Wherein, it also includes a first elastic member provided between the shift lever and the housing and a second elastic member provided between the rotating plate and the housing. When the rotating disk is in the positioning position, the shift lever overcomes the elastic force of the first elastic member to rotate and disengage from the rotating plate, and the rotating plate rotates and disengages from the gear set under the elastic force of the second elastic member. When the rotating disk is in the disconnected position, the first elastic member releases its elastic force and drives the shift lever to abut against the rotating plate, thereby driving the rotating plate to overcome the elastic force of the second elastic member to rotate and interfere with the gear set.

[0017] The elastic force of the first elastic member is greater than the elastic force of the second elastic member.

[0018] Furthermore, the first elastic member and the second elastic member are both torsion springs.

[0019] Furthermore, the shifting rod is provided with a convex column for abutting against the rotating plate, and the rotating plate is provided with a notch that is adapted to the shape of the convex column.

[0020] Furthermore, the protrusion is a cylinder, and the notch is an arc-shaped notch.

[0021] Furthermore, it also includes a home appliance switch, the home appliance switch includes a fixed elastic piece and a movable elastic piece, the movable elastic piece is always in contact with the shifting rod;

[0022] When the rotating disk is at the timing position, the shifting rod drives the movable elastic piece to rotate and connect with the fixed elastic piece; when the rotating disk is at the disconnecting position, the movable elastic piece is separated from the fixed elastic piece.

[0023] Furthermore, when the turntable is in the disconnected position, the movable elastic piece and the first elastic member jointly drive the shifting rod to abut against the rotating plate.

[0024] Furthermore, a stopper is provided on the rotating plate, and when the turntable is in the disconnected position, the stopper engages with the teeth in the gear set to achieve interference.

[0025] Furthermore, the gear set includes at least a first gear, which is a double gear and includes a large gear and a small gear. The large gear is a ratchet gear and can be engaged with the block to achieve interference, and the small gear participates in the transmission of the gear set.

[0026] Furthermore, a limiting groove is provided on the outer edge of the turntable to form a disconnection position, and the other parts of the outer edge of the turntable except the limiting groove form a timing position;

[0027] The shifting rod is provided with a limiting block which can be inserted into the limiting groove, and the limiting block can slide along the outer edge of the rotating disk or the limiting groove.

[0028] Furthermore, a first guide surface is formed on the side of the limiting groove, and a second guide surface is provided on the limiting block to abut against the first guide surface. The first guide surface and the second guide surface are inclined surfaces or arc surfaces.

[0029] In summary, the present invention provides a reliable timer with the following beneficial effects:

[0030] (1) The timer of the present invention sets a first elastic member between the lever and the housing. When the dial is in the positioning position, the first elastic member is compressed and stores elastic potential energy. When the dial is in the disconnected position, the first elastic member releases the elastic force and drives the lever to rotate, thereby increasing the force acting on the lever, thereby ensuring that the lever can smoothly trigger the interference component, making its structure more stable and reliable; secondly, by setting a second elastic member between the housing and the rotating plate, the second elastic member can constrain the rotation of the rotating plate, thereby preventing it from rotating due to external disturbances. Therefore, there is no need to set an additional block like a traditional rotating plate, thereby simplifying the structure of the rotating plate, reducing the processing difficulty, improving the processing efficiency, and reducing the cost.

[0031] (2) In the timer of the present invention, a boss is provided on the shift lever, and a notch that matches the shape of the boss is provided on the rotating plate. Thus, the reliability of the abutment between the boss and the notch can be ensured by the snap fit between the boss and the notch, thereby ensuring that the shift lever can smoothly drive the rotating plate to rotate, thereby improving the reliability of the transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural diagram of the timer of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of the timer of the present invention after the upper shell is hidden;

[0034] Figure 3 for Figure 2 Schematic diagram of part of the structure;

[0035] Figure 4 It is a schematic structural diagram of the rotating plate and the first gear in the timer of the present invention;

[0036] Figure 5 This is a schematic structural diagram of the turntable and the lever in the timer of the present invention;

[0037] Figure 6 This is a structural diagram of the timer of the present invention from another perspective.

[0038] The meanings of the reference numerals are as follows:

[0039] 1. Housing; 11. Upper shell; 111. Limit stop bar; 12. Lower shell; 2. Rotating shaft; 21. Limit rod; 3. Appliance switch; 31. Fixed spring; 32. Moving spring; 4. Gear set; 41. First gear; 411. Large gear; 412. Small gear; 42. Second gear; 5. Driving lever; 51. Boss; 52. Sleeve column; 53. Limit block; 531. Second guide surface; 6. Rotating plate; 61. Notch; 62. Stop block; 7. Turntable; 71. Limit slot; 711. First guide surface. DETAILED DESCRIPTION

[0040] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the modules or components referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0043] See Figure 1-6The present invention provides a reliable timer, comprising a housing 1, a rotating shaft 2, and a rotating disk 7. The housing 1 has an internal accommodating cavity formed therein. The rotating shaft 2 is provided on the housing 1 and partially extends into the accommodating cavity. The portion of the rotating shaft 2 extending outside the housing 1 forms an operating portion operable by a user. Preferably, a knob or the like can be installed on the operating portion for the user to turn. The rotating disk 7 is sleeved on the rotating shaft 2 and located in the accommodating cavity. The rotating disk 7 rotates synchronously with the rotating shaft 2, that is, when the rotating shaft 2 is driven to rotate, the rotating disk 7 can be driven to rotate synchronously. The rotating disk 7 is provided with a timing position and an off position on its periphery. In addition, the timer also includes a gear set 4, a power mechanism, a lever 5 and an interference assembly. The gear set 4 is arranged in the accommodating chamber and meshes with the rotating shaft 2 for transmission; the power mechanism provides power for the gear set 4, the lever 5 is rotatably arranged on the shell 1 and is located in the accommodating chamber; the lever 5 is in transmission cooperation with the rotating shaft 2; the interference assembly is arranged in the accommodating chamber, and the interference assembly includes a rotating plate 6 rotatably arranged on the shell 1 for interfering with the gear set 4; the lever 5 is in transmission cooperation with the rotating plate 6; in addition, the timer also includes a household appliance switch 3, which includes a fixed elastic piece 31 and a movable elastic piece 32, and the movable elastic piece 32 is always in contact with the lever 5.

[0044] When the turntable 7 is in the positioning position, the lever 5 connects the appliance switch 3, and at the same time, the lever 5 is disengaged from the rotating plate 6, and the rotating plate 6 does not interfere with the gear set 4; when the turntable 7 is in the disconnecting position, the lever 5 disconnects the appliance switch 3, and at the same time, the lever 5 drives the rotating plate 6 to rotate and interfere with the gear set 4.

[0045] In addition, it also includes a first elastic member arranged between the shift lever 5 and the shell 1 and a second elastic member arranged between the rotating plate 6 and the shell 1. When the turntable 7 is in the positioning position, the turntable 7 can drive the shift lever 5 to overcome the elastic force of the first elastic member and the movable elastic plate 32 and rotate to disengage from the rotating plate 6. At this time, the first elastic member and the movable elastic plate 32 are both compressed and store elastic potential energy. At this time, the rotating plate 6 rotates under the elastic force of the second elastic member and disengages from the gear set 4; when the turntable 7 is in the disconnected position, the first elastic member and the movable elastic plate 32 simultaneously release the elastic force and drive the shift lever 5 to abut against the rotating plate 6, thereby driving the rotating plate 6 to overcome the elastic force of the second elastic member and rotate and interfere with the gear set 4; wherein, the elastic force of the first elastic member is greater than the elastic force of the second elastic member.

[0046] Therefore, the timer of the present invention provides a first elastic member between the dial rod 5 and the shell 1. When the turntable 7 is in the positioning position, the first elastic member and the movable elastic piece 32 are compressed and store elastic potential energy. When the turntable 7 is in the disconnected position, the first elastic member and the movable elastic piece 32 simultaneously release the elastic force and drive the dial rod 5 to rotate, thereby increasing the force acting on the dial rod 5, thereby ensuring that the dial rod 5 can smoothly trigger the interference component, making its structure more stable and reliable; secondly, by providing a second elastic member between the shell 1 and the rotating plate 6, the second elastic member can constrain the rotation of the rotating plate 6, thereby preventing it from rotating due to external disturbances. Therefore, there is no need to provide an additional block 62 like the traditional rotating plate 6, thereby simplifying the structure of the rotating plate 6, reducing the processing difficulty, improving the processing efficiency, and reducing the cost.

[0047] Preferably, the first elastic member is a first torsion spring, which has a first torsion spring body and a first extending end and a second extending end respectively extending from both ends of the first torsion spring body. A first mounting post is provided on the housing 1, and a sleeve post 52 is provided at one end of the shift rod 5, and the sleeve post 52 is sleeved on the first mounting post to achieve a rotational connection to the housing 1; the first torsion spring body is sleeved on the first mounting post and the first extending end abuts against the housing 1, and the second extending end abuts against the sleeve post 52 or other position on the shift rod 5; thus, under the elastic force of the first torsion spring, the shift rod 5 can have a tendency to rotate in the clockwise direction.

[0048] Similarly, preferably, the second elastic member is a second torsion spring, which has a second torsion spring body and a third and fourth protruding ends respectively extending from both ends of the second torsion spring body. The housing 1 is also provided with a second mounting post, and a rotating hole is provided in the center of the rotating plate 6, and the rotating hole is sleeved on the second mounting post to achieve a rotational connection to the housing 1. The second torsion spring body is sleeved on the second mounting post, and the third protruding end abuts against the housing 1, and the fourth protruding end abuts against the rotating plate 6. In addition, a limiting mechanism is further provided between the housing 1 and the rotating plate 6. When the deflector 5 is disengaged from the rotating plate 6, the elastic force of the second torsion spring can drive the rotating plate 6 to rotate in the counterclockwise direction and be fixed by the limiting mechanism. Preferably, when the rotating plate 6 is limited by the limiting mechanism, it is in a horizontal state (such as Figure 3 ), at this time, the rotating plate 6 does not interfere with the gear set 4.

[0049] Furthermore, the other end of the lever 5 is further provided with a boss 51 for abutting against the rotating plate 6, and the outer edge of the rotating plate 6 is provided with a notch 61 that matches the shape of the boss 51. Preferably, the boss 51 is a cylinder, and the notch 61 is an arc-shaped notch.

[0050] Thus, when the turntable 7 is in the positioning position, the boss 51 on the lever 5 can abut against the notch 61 to drive the rotating plate 6 to rotate. Therefore, the engagement between the boss 51 and the notch 61 can ensure the reliability of the abutment between the two, thereby ensuring that the lever 5 can smoothly drive the rotating plate 6 to rotate, thereby improving the reliability of the transmission.

[0051] Furthermore, the power mechanism is a clockwork device. The timer is in a stopped state by default, and the turntable 7 is in the disconnected position by default. The turntable 7 moves synchronously with the shaft 2. When the timer starts, the user turns the shaft 2 clockwise. Since the shaft 2 moves synchronously with the gear set 4, and the gear set 4 is connected to the clockwork device, the clockwork device can store energy during this process. At the same time, the shaft 2 drives the turntable 7 to rotate to the timing position. At this time, the lever 5 drives the movable spring 32 to rotate and abut against the fixed spring 31, turning the home appliance switch 3 on and the home appliance operating. When the timing is completed, the clockwork device gradually releases the stored energy, which pushes the gear set 4 and drives the shaft 2 and turntable 7 counterclockwise until the turntable 7 returns from the timing position to the initial disconnected position. At this time, the lever 5 is rotated by the elastic force of the first elastic member and the movable spring 32, causing the movable spring 32 to separate from the fixed spring 31. At this time, the home appliance switch 3 is turned off and the home appliance stops operating. At this time, the clockwork device has not stopped releasing energy, and the gear set 4 is still engaged in transmission, so an interference component is needed to interfere with it to prevent it from rotating.

[0052] The rotating plate 6 is provided with a stopper 62. When the rotating disk 7 is in the disconnected position, the stopper 62 meshes with the teeth of the gear set 4 to achieve interference. The gear set 4 includes a first gear 41, which is a double gear and includes a large gear 411 and a small gear 412. The large gear 411 is a ratchet gear that can be engaged with the stopper 62 to achieve interference. The small gear 412 participates in the transmission of the gear set 4.

[0053] Therefore, when the turntable 7 is in the timing position, the lever 5 is separated from the rotating plate 6. At this time, the rotating plate 6 is reset under the elastic force of the second elastic member and the stopper 62 is separated from the large gear 411; when the turntable 7 is in the disconnected position, the lever 5 drives the rotating plate 6 to rotate so that the stopper 62 on the rotating plate 6 is engaged with the teeth of the large gear 411 to achieve interference, thereby stopping the first gear 41 from rotating.

[0054] In this embodiment, the gear set 4 is further provided with a second gear 42 sleeved on the rotating shaft 2 , and the second gear 42 is in driving engagement with the remaining teeth of the gear set 4 .

[0055] In this embodiment, a limiting groove 71 is provided on the outer edge of the turntable 7 to form a disconnected position, and the other parts of the outer edge of the turntable 7 except the limiting groove 71 form a timing position; wherein, a limiting block 53 is protruded from the middle part of the shift rod 5 and can be extended into the limiting groove 71, and the limiting block 53 can slide along the outer edge of the turntable 7 or the limiting groove 71.

[0056] Therefore, when the limit block 53 on the lever 5 slides on the outer edge of the turntable 7, it is in the timing position; when the limit block 53 on the lever 5 slides from the outer edge of the turntable 7 into the limit groove 71, the lever 5 is suddenly released and rotates under the action of the first elastic member and the movable spring 32, thereby driving the rotating plate 6 to rotate to stop the gear set 4 from rotating.

[0057] In order to improve the transition of the turntable 7 from the disconnected position to the timing position, a first guide surface 711 is formed on the side of the limit groove 71, and a second guide surface 531 is provided on the limit block 53 to abut against the first guide surface 711. The first guide surface 711 and the second guide surface 531 are inclined surfaces or arc surfaces.

[0058] Thus, the abutment between the first guide surface 711 and the second guide surface 531 can improve the transition of the turntable 7 from the disconnected position to the timing position or from the timing position to the disconnected position.

[0059] Furthermore, the timer housing 1 includes an upper shell 11 and a lower shell 12, which are interconnected and form a receiving chamber. Support columns and positioning holes are provided within the upper shell 11 and / or the lower shell 12. The positioning holes correspond to the support columns on the other side. The support columns are used to support the upper and lower shells 11 and 12. Bolt holes are also provided through the support columns, and bolt connection holes are provided within the positioning holes. This configuration not only provides structural support but also space for bolt connection without the need for additional holes, thereby enhancing the support and fixing functions of the support columns, achieving two goals at once.

[0060] See also Figure 6 More preferably, a limit stop bar 111 is protruding from the upper shell 11, and a synchronously rotating limit rod 21 is also provided on the rotating shaft 2. When the turntable 7 moves from the timing position to the disconnection position and reaches the disconnection position, the limit stop bar 111 can block the limit rod 21 and stop the movement, so that the gear set 4 can stop in time when the turntable 7 reaches the disconnection position.

[0061] In summary, the present invention provides a reliable timer with the following beneficial effects:

[0062] (1) The timer of the present invention provides a first elastic member between the lever 5 and the housing 1. When the turntable 7 is in the positioning position, the first elastic member is compressed and stores elastic potential energy. When the turntable 7 is in the disconnected position, the first elastic member releases the elastic force and drives the lever 5 to rotate, thereby increasing the force acting on the lever 5, thereby ensuring that the lever 5 can smoothly trigger the interference component, making its structure more stable and reliable; secondly, by providing a second elastic member between the housing 1 and the rotating plate 6, the second elastic member can constrain the rotation of the rotating plate 6, thereby preventing it from rotating due to external disturbances. Therefore, there is no need to provide an additional block 62 like the traditional rotating plate 6, thereby simplifying the structure of the rotating plate 6, reducing the processing difficulty, improving the processing efficiency, and reducing the cost.

[0063] (2) In the timer of the present invention, the lever 5 is provided with a boss 51, and the rotating plate 6 is provided with a notch 61 that matches the shape of the boss 51. Thus, the engagement between the boss 51 and the notch 61 ensures the reliability of the abutment between the two, thereby ensuring that the lever 5 can smoothly drive the rotating plate 6 to rotate, thereby improving the reliability of the transmission.

[0064] It should be understood that the terms "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the modules or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0065] In addition, in the description of the present invention, “multiple” and “several” mean two or more, unless otherwise clearly and specifically defined.

[0066] The technical means disclosed in the solutions of the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A reliable timer, characterized in that: include: a housing having an accommodating cavity formed therein; A rotating shaft is provided on the housing and partially extends into the accommodating cavity; the portion of the rotating shaft extending outside the housing forms an operating portion operable by a user; A turntable is sleeved on the rotating shaft and located in the accommodating cavity; the turntable rotates synchronously with the rotating shaft; and a timing position and a disconnection position are provided on the turntable; a gear set, which is disposed in the accommodating cavity and meshes with the rotating shaft for rotation; a power mechanism providing rotational force for the gear set; A shift lever is rotatably mounted on the housing and located within the accommodating cavity; the shift lever is in transmission engagement with the rotating shaft; An interference assembly is disposed in the accommodating cavity; the interference assembly includes a rotating plate disposed on the housing for interfering with the gear set and rotating the plate; the shift lever is in transmission engagement with the rotating plate; when the turntable is in the timing position, the shift lever is disengaged from the rotating plate, and the rotating plate does not interfere with the gear set; when the turntable is in the disconnected position, the shift lever drives the rotating plate to rotate and interfere with the gear set; Wherein, it also includes a first elastic member provided between the shift lever and the housing and a second elastic member provided between the rotating plate and the housing. When the turntable is in the timing position, the shift lever overcomes the elastic force of the first elastic member to rotate and disengage from the rotating plate, and the rotating plate rotates and disengages from the gear set under the elastic force of the second elastic member. When the turntable is in the disconnected position, the first elastic member releases its elastic force and drives the shift lever to abut against the rotating plate, thereby driving the rotating plate to overcome the elastic force of the second elastic member to rotate and interfere with the gear set. The elastic force of the first elastic member is greater than the elastic force of the second elastic member.

2. The timer according to claim 1, wherein: The first elastic member and the second elastic member are both torsion springs.

3. The timer according to claim 1, wherein: The shifting rod is provided with a convex column for abutting against the rotating plate, and the rotating plate is provided with a notch that is adapted to the shape of the convex column.

4. The timer according to claim 3, characterized in that The protrusion is a cylinder, and the notch is an arc-shaped notch.

5. The timer according to any one of claims 1 to 4, characterized in that: The invention also includes a home appliance switch, the home appliance switch includes a fixed elastic piece and a movable elastic piece, the movable elastic piece is always in contact with the shifting rod; When the rotating disk is at the timing position, the shifting rod drives the movable elastic piece to rotate and connect with the fixed elastic piece; when the rotating disk is at the disconnecting position, the movable elastic piece is separated from the fixed elastic piece.

6. The timer according to claim 5, characterized in that When the rotating disk is in the disconnected position, the movable elastic piece and the first elastic member jointly drive the shifting rod to abut against the rotating plate.

7. The timer according to claim 1, characterized in that A stopper is provided on the rotating plate. When the rotating disc is in the disconnected position, the stopper meshes with the teeth in the gear set to achieve interference.

8. The timer according to claim 7, characterized in that The gear set includes at least a first gear, which is a double gear and includes a large gear and a small gear. The large gear is a ratchet gear and can be engaged with the block to achieve interference. The small gear participates in the transmission of the gear set.

9. The timer according to claim 1, characterized in that A limiting groove is provided on the outer edge of the turntable to form an off position, and the other parts of the outer edge of the turntable except the limiting groove form a timing position; The shifting rod is provided with a limiting block which can be inserted into the limiting groove, and the limiting block can slide along the outer edge of the rotating disk or the limiting groove.

10. The timer according to claim 9, characterized in that A first guide surface is formed on the side of the limiting groove, and a second guide surface is provided on the limiting block to abut against the first guide surface. The first guide surface and the second guide surface are inclined surfaces or arc surfaces.

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