Timer reliable to use

Abstract

The invention discloses a timer reliable to use. The timer comprises a shell, a rotating shaft, a rotating disc, a gear set, a power mechanism, a shifting rod and an interference assembly. The first elastic piece is arranged between the shifting rod and the shell, the second elastic piece is arranged between the rotating plate and the shell, when the rotating disc is located at the positioning position, the shifting rod overcomes the elastic force of the first elastic piece to rotate and is separated from the rotating plate, and the rotating plate rotates under the elastic force action of the second elastic piece and is separated from the gear set; when the rotating disc is in the disconnection position, the first elastic piece releases elastic force and drives the shifting rod to abut against the rotating plate, and then the rotating plate is driven to overcome the elastic force of the second elastic piece to rotate and interfere with the gear set. Therefore, the first elastic piece is arranged between the deflector rod and the shell, when the rotating disc is located at the positioning position, the first elastic piece is compressed and stores elastic potential energy, and when the rotating disc is located at the disconnection position, the first elastic piece releases elastic force and drives the deflector rod to rotate, so that the acting force on the deflector rod is increased; further, the shifting rod can smoothly trigger the interference assembly, so that the interference assembly is more stable and reliable; secondly, the second elastic piece is arranged between the shell and the rotating plate and can restrain the rotation of the rotating plate, so that the rotating plate is prevented from rotating due to external disturbance, the situation that a stop block needs to be additionally arranged like a traditional rotating plate is avoided, the structure of the rotating plate is simplified, the machining difficulty is reduced, and the machining efficiency is improved. The processing efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The 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] At present, timers are widely used in various household electrical appliances and are well known to people. Application No. 202121073953.2 discloses a timer, including a rotating shaft, a gear set, a power mechanism, a turntable, a lever and an interference assembly. The turntable is provided with a timing position and a disconnection position 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 disconnection position, the lever triggers the interference assembly. Among them, 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 sheet and a movable elastic sheet, and the movable elastic sheet is in contact with the lever. When the turntable is in the disconnected position, the lever can be driven to rotate under the elastic force of the movable elastic sheet, and then the rotating plate is driven to rotate through the lever to achieve interference; in addition, a block is also provided on the rotating plate. When the rotating plate is not touched by the lever, the upper block of the block contacts the gear set due to external disturbance, so that the rotating plate rotates, but the other block of the rotating plate after rotation will interfere with the gear set, so that the rotating plate rebounds and rotates in the opposite direction, so that the rotating plate must be triggered by the lever, 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 easy to rotate due to external disturbances; therefore, the merchant needs 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, 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, thereby ensuring that the lever can smoothly trigger the interference component, making its structure 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, so it is necessary to set another stopper on the rotating plate, thereby simplifying the structure of the rotating plate, reducing the processing difficulty, improving the processing efficiency, and reducing the cost.

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

[0008] A reliable timer is used, comprising:

[0009] A housing having a receiving cavity formed therein;

[0010] A rotating shaft is disposed 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 rotating disk is sleeved on the rotating shaft and located in the accommodating cavity; the rotating disk rotates synchronously with the rotating shaft; a timing position and a disconnection position are provided on the rotating disk;

[0012] A gear set, which is disposed in the accommodating cavity and meshes with the rotating shaft for rotation;

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

[0014] A lever, which is rotatably disposed on the housing and located in the accommodating cavity; the lever is in transmission cooperation with the rotating shaft;

[0015] An interference assembly is arranged in the accommodating cavity; the interference assembly includes a rotating plate arranged on the housing and used to interfere with the gear set and rotate; the shifting rod is in transmission cooperation with the rotating plate; when the rotating disk is in the positioning position, the shifting rod is disengaged from the rotating plate, and the rotating plate does not interfere with the gear set; when the rotating disk is in the disconnected position, the shifting rod drives the rotating plate to rotate and interfere with the gear set;

[0016] Wherein, it also includes a first elastic member arranged between the lever and the housing and a second elastic member arranged between the rotating plate and the housing. When the rotating disk is in the positioning position, the 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 the elastic force and drives the 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 lever is provided with a convex column for abutting against the rotating plate, and the rotating plate is provided with a notch matched with 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 household appliance switch, the household appliance switch includes a fixed elastic sheet and a movable elastic sheet, the movable elastic sheet is always in contact with the lever;

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

[0023] Furthermore, when the rotating disk is in the disconnected position, the movable elastic sheet 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 rotating disk is in the disconnected position, the stopper meshes 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 rotating disk to form a disconnection position, and other parts of the outer edge of the rotating disk except the limiting groove form a timing position;

[0027] The shifting rod is provided with a limiting block which can be extended 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 a side of the limiting groove, and a second guide surface abutting against the first guide surface is provided on the limiting block, and 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, which has the following beneficial effects:

[0030] (1) The timer of the present invention sets 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, 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 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, 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, the lever is provided with a boss, and the rotating plate is provided with a notch that matches the shape of the boss. Thus, the reliability of the abutment between the boss and the notch can be ensured through the snap fit between the boss and the notch, thereby ensuring that the 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 schematic 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 some structures;

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

[0036] Figure 5 It is a schematic diagram of the structure of the rotating disk and the lever in the timer of the present invention;

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

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

[0039] 1. Shell; 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. Push rod; 51. Boss; 52. Sleeve column; 53. Limit block; 531. Second guide surface; 6. Rotating plate; 61. Notch; 62. Stop block; 7. Turntable; 71. Limit groove; 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 in conjunction with 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" 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 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 also Figure 1-6The present invention provides a reliable timer, comprising a housing 1, a shaft 2 and a turntable 7. The housing 1 has a receiving cavity formed therein. The shaft 2 is arranged on the housing 1 and partially extends into the receiving cavity. The part of the shaft 2 extending out of the housing 1 forms an operating part for users to operate. Preferably, a knob or the like can be installed on the operating part for users to turn. The turntable 7 is sleeved on the shaft 2 and located in the receiving cavity. The turntable 7 rotates synchronously with the shaft 2, that is, when the shaft 2 is driven to rotate, the turntable 7 can be driven to rotate synchronously. The turntable 7 is provided with a timing position and a disconnection position at the 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 sheet 31 and a movable elastic sheet 32, and the movable elastic sheet 32 ​​is always in contact with the lever 5.

[0044] When the turntable 7 is in the positioning position, the lever 5 connects the home 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 home 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 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 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 release the elastic force at the same time and drive the 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 arranges a first elastic member between the lever 5 and the shell 1. When the turntable 7 is in the positioning position, the first elastic member and the movable elastic plate 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 plate 32 release elastic force at the same time and drive 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 arranging 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, so there is no need to set 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 two ends of the first torsion spring body. A first mounting column is provided on the shell 1, and a sleeve column 52 is provided at one end of the lever 5, and the sleeve column 52 is sleeved on the first mounting column to realize rotational connection on the shell 1; the first torsion spring body is sleeved on the first mounting column and the first extending end abuts against the shell 1, and the second extending end abuts against the sleeve column 52 or other positions on the lever 5; thereby, under the elastic force of the first torsion spring, the lever 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 extension end and a fourth extension end extending from both ends of the second torsion spring body, respectively. The housing 1 is also provided with a second mounting post, and a rotation hole is provided at the center of the rotating plate 6, and the rotation hole is sleeved on the second mounting post to achieve rotational connection to the housing 1. The second torsion spring body is sleeved on the second mounting post, and the third extension end abuts against the housing 1, and the fourth extension end abuts against the rotating plate 6. In addition, a limiting mechanism is also provided between the housing 1 and the rotating plate 6. When the lever 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 and the gear set 4 do not interfere.

[0049] Furthermore, the other end of the lever 5 is further provided with a convex column 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 convex column 51. Preferably, the convex column 51 is a cylinder, and the notch 61 is an arc-shaped notch.

[0050] Thus, when the rotating disk 7 is in the positioning position, the protruding column 51 on the lever 5 can abut against the notch 61 to drive the rotating plate 6 to rotate. Therefore, the engagement between the protruding column 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, the turntable 7 is in the disconnected position by default, and the turntable 7 moves synchronously with the shaft 2; when the timer starts timing, the user twists the shaft 2 to rotate clockwise, and 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 in this process; at the same time, the shaft 2 drives the turntable 7 to rotate to the timing position, at which time the lever 5 drives the movable spring 32 to rotate and abuts against the fixed spring 31 so that the home appliance switch 3 is turned on and the home appliance works. When the timing is completed, the clockwork device gradually releases the stored energy, which pushes the gear set 4 and then drives the shaft 2 and the turntable 7 to rotate counterclockwise until the turntable 7 returns from the timing position to the initial disconnected position, at which time the lever 5 rotates under the elastic force of the first elastic member and the movable spring 32 and separates the movable spring 32 from the fixed spring 31, at which time the home appliance switch 3 is turned off and the home appliance stops working. At this time, the clockwork device has not stopped releasing energy, and the gear set 4 is still in meshing 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, and when the rotating disk 7 is in the disconnected position, the stopper 62 meshes with the teeth in 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 and can be engaged with the stopper 62 to achieve interference, and 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, and 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 meshed 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 convexly provided in the middle part of the lever 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 abutting against the first guide surface 711 is provided on the limit block 53. The first guide surface 711 and the second guide surface 531 are inclined surfaces or arc surfaces.

[0058] Therefore, 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 housing 1 of the timer includes an upper shell 11 and a lower shell 12, the upper shell 11 and the lower shell 12 are connected to each other and form a receiving cavity inside; a support column and a positioning hole are provided in the upper shell 11 and / or the lower shell 12, the positioning hole is provided corresponding to the support column on the other side, the support column is used for mutual support between the upper shell 11 and the lower shell 12, a through bolt hole is also provided in the support column, and a bolt connection hole is provided in the positioning hole. With such a configuration, the support column plays a role of structural support on the one hand, and on the other hand, provides space for bolt connection without the need for additional holes, and enhances the support and fixing function of the support column, killing two birds with one stone.

[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 disconnecting position and reaches the disconnecting 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 disconnecting position.

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

[0062] (i) 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, a second elastic member is provided 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 stopper 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] (ii) 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 reliability of the abutment between the boss 51 and the notch 61 can be ensured through the engagement between the boss 51 and the notch 61, 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 orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 than two, unless otherwise clearly and specifically defined.

[0066] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A reliable timer, characterized in that: include: A housing having a receiving cavity formed therein; A rotating shaft is disposed 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 rotating disk is sleeved on the rotating shaft and located in the accommodating cavity; the rotating disk rotates synchronously with the rotating shaft; a timing position and a disconnection position are provided on the rotating disk; A gear set, which is disposed in the accommodating cavity and meshes with the rotating shaft for rotation; A power mechanism, which provides rotational force for the gear set; A lever, which is rotatably disposed on the housing and located in the accommodating cavity; the lever is in transmission cooperation with the rotating shaft; An interference assembly is arranged in the accommodating cavity; the interference assembly includes a rotating plate arranged on the housing and used to interfere with the gear set and rotate; the shifting rod is in transmission cooperation with the rotating plate; when the rotating disk is in the positioning position, the shifting rod is disengaged from the rotating plate, and the rotating plate does not interfere with the gear set; when the rotating disk is in the disconnected position, the shifting rod drives the rotating plate to rotate and interfere with the gear set; Wherein, it also includes a first elastic member arranged between the lever and the housing and a second elastic member arranged between the rotating plate and the housing. When the rotating disk is in the positioning position, the 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 the elastic force and drives the 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, characterized in that: The first elastic member and the second elastic member are both torsion springs.

3. The timer according to claim 1, characterized in that: The lever is provided with a convex column for abutting against the rotating plate, and the rotating plate is provided with a notch matched with the shape of the convex column.

4. The timer according to claim 3, characterized in that: The protruding column is a cylindrical column, and the notch is an arc-shaped notch.

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

6. The timer according to claim 5, characterized in that: When the rotating disk is in the disconnected position, the movable elastic sheet 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: The rotating plate is provided with a stopper, and when the rotating disk 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, and 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 rotating disk to form a disconnection position, and the other parts of the outer edge of the rotating disk except the limiting groove form a timing position; The shifting rod is provided with a limiting block which can be extended 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 abutting and matching with the first guide surface is provided on the limiting block. The first guide surface and the second guide surface are inclined surfaces or arc surfaces.

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