Electric washing timer with power-off protection structure

Abstract

The utility model discloses an electric washing timer with a power-off protection structure. The electric washing timer comprises a shell, a timing main shaft, a control reed group and a main contact reed group, the device further comprises a protection reed set and a protection wheel set. The protection reed group comprises a first protection reed and a second protection reed, and the main contact reed group is communicated with the control reed group through the protection reed group; the protection wheel set is in transmission connection with the timing main shaft, and the protection wheel set is further in transmission fit with the first protection reed. The first protection reed can be driven by the protection wheel set to be close to or far away from the second protection reed, so that the first protection reed and the second protection reed are contacted or disconnected, and connection and disconnection between the main contact reed set and the control reed set are controlled. According to the utility model, the disconnection of the protection reed group can also ensure that the current at the main contact reed group does not flow to the control reed group, so that the washing timer and the washing motor are protected.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of washing machine timing device, concretely relates to an electric type washing timer with power-off protection structure. BACKGROUND

[0002] The washing timer is an important part in the washing machine, which is mainly used to control the forward and reverse rotation of the motor and the washing and rinsing time. The existing washing timer on the market is generally spring type, which relies on the spring as power to drive the gear to rotate for timing.

[0003] With the development of washing machine technology in recent years, the functions of the existing washing machine on the market have become diversified, so the requirements for the washing timer in the washing machine are also constantly improving, resulting in that the existing washing timer not only needs to control the start and stop of the washing machine and the switching of the forward and reverse rotation, but also needs to control the switching between washing and soaking of the washing machine, so as to realize the function of soaking washing of the washing machine.

[0004] Based on the washing timer with the control soaking function mentioned above, the existing washing timer has undergone several iterations and upgrades. With the development of intelligentization of electrical appliances, the existing washing machine on the market has also begun to move towards this intelligent and digital direction, so the previous manual rotation of the button to set the timing for the washing timer has become unsuitable. Therefore, the existing washing timer on the market has begun to change to provide power for the timer to set the timing through the built-in timing motor.

[0005] Among them, the Chinese patent with the patent number CN201821446315.9 discloses: "an internal spring contact electric connection structure of a washing timer, including a control contact spring group and a main contact spring group; the control contact spring group includes a conductive sheet, a forward rotation contact spring and a reverse rotation contact spring, one end of the conductive sheet forms a first connection end; the main contact spring group includes a main touch spring and a main switch spring, one end of the main touch spring forms a second connection end; characterized in that: the first connection end and the second connection end are directly electrically connected together through a rib and groove insertion structure, the rib and groove insertion structure includes a clamping rib and a clamping groove which are tightly clamped together. The elastic property of the spring material itself is beneficial, the clamping rib can be tightly clamped into the clamping groove for connection, which belongs to the connection of size interference fit, not only ensures the reliability of the connection, but also ensures that the two are in conductive contact with each other, which cancels the traditional wire welding method, so there is no risk of welding separation, and the cost brought by the welding process is also eliminated".

[0006] But including the scheme recorded in the above patent, the electric washing timer in the prior art has a problem, that is, because the main contact spring group is used to control the on-off of the power supply for the washing motor, and the control spring group is used to control the forward and reverse rotation of the washing motor, and the main contact spring group is communicated with the washing motor through the control spring group, but because the washing timer is powered by the timing motor during use, the control spring group cannot be ensured to be disconnected when the timing is over, and if the control spring group is still in the on state after the timing stops, it will cause the main contact spring group to continuously supply power to the washing motor through the control spring group, and thus the washing timer and the washing motor may be burned out. SUMMARY

[0007] In order to overcome the deficiency that the electric washing timer in the prior art cannot ensure that the power supply to the washing motor is cut off when the timing is stopped, and the device is easily burned out, the utility model provides an electric washing timer with a power-off protection structure.

[0008] The technical scheme for solving the technical problem of the utility model is as follows: an electric washing timer with a power-off protection structure, comprising:

[0009] A shell;

[0010] A timing main shaft rotatably arranged in the shell;

[0011] A control spring group for communicating with a washing motor in a washing machine;

[0012] A main contact spring group comprising at least a moving spring and a stationary spring for connecting a power line, and the control spring group is in communication with the main contact spring group;

[0013] Further comprising:

[0014] A protection spring group comprising a first protection spring and a second protection spring, and the main contact spring group is communicated with the control spring group through the protection spring group;

[0015] A protection wheel group in transmission connection with the timing main shaft, and the protection wheel group is also in transmission cooperation with the first protection spring;

[0016] The first protection spring can be driven by the protection wheel group to approach or move away from the second protection spring, so that the first protection spring and the second protection spring are in contact or disconnected, and thus the on-off between the main contact spring group and the control spring group is realized.

[0017] Further, the main contact spring group further comprises a conductive spring, the conductive spring is connected with the second protection spring, and the first protection spring is in communication with the control spring group.

[0018] Further, one end of the conductive reed is provided with an upper connecting plate, one end of the second protective reed is provided with a lower connecting plate, the upper connecting plate is further provided with a clamping groove, and the lower connecting plate can be inserted into the clamping groove and abut against the inner wall of the clamping groove, so as to realize the connection between the conductive reed and the second protective reed.

[0019] Further, the first reed seat and the second reed seat are further stacked in the shell, the main reed group is connected to the first reed seat, the protective reed group is connected to the second reed seat, the upper side of the first reed seat is provided with an upper connecting groove, the lower side of the second reed seat is provided with a lower connecting groove, the upper connecting groove and the lower connecting groove are combined to form a connecting cavity, and the upper connecting plate and the lower connecting plate are located in the connecting cavity.

[0020] Further, the protective wheel group comprises a protective cam which is in transmission connection with the timing main shaft and a protective lever which is swingably arranged, one end of the protective lever is hinged in the shell, the inner side of the other end of the protective lever abuts against the outer circumferential surface of the protective cam, and the outer side of the other end of the protective lever abuts against the first protective reed.

[0021] Further, the shell is further provided with a main control wheel group, the main control wheel group comprises a main control cam which is in transmission connection with the timing main shaft and a main control lever which is swingably arranged, one end of the main control lever is hinged in the shell, the inner side of the other end of the main control lever abuts against the outer circumferential surface of the main control cam, and the outer side of the other end of the main control lever abuts against the moving reed, the moving reed can be driven by the main control wheel group to approach or move away from the static reed, so as to control the contact or disconnection between the moving reed and the static reed.

[0022] Further, the shell is further provided with a soaking wheel group, the soaking wheel group comprises a soaking cam which is in transmission connection with the timing main shaft and a soaking lever which is swingably arranged, one end of the soaking lever is hinged in the shell, the inner side of the other end of the soaking lever abuts against the outer circumferential surface of the soaking cam, and the outer side of the other end of the soaking lever abuts against the conductive reed, the conductive reed can be driven by the soaking wheel group to approach or move away from the static reed, so as to control the contact or disconnection between the conductive reed and the static reed.

[0023] Further, the main contact spring group further comprises a buzzer spring connected with a buzzer of the washing machine, and a buzzer wheel group is arranged in the shell, the buzzer wheel group comprises a buzzer cam connected with the timing main shaft and a buzzer lever arranged to be swingable, one end of the buzzer lever is hinged to the shell, and the other end of the buzzer lever is in abutment with the outer circumferential surface of the buzzer cam, and the outer side of the other end of the buzzer lever is in abutment with the buzzer spring; the buzzer spring can be driven by the buzzer wheel group to approach or move away from the movable spring, so as to control the contact or disconnection between the buzzer spring and the movable spring.

[0024] Further, the control spring group comprises a forward rotation spring, a reverse rotation spring and a switching spring arranged between the forward rotation spring and the reverse rotation spring, the switching spring is connected with the first protection spring, and the forward rotation spring and the reverse rotation spring are connected with a washing motor of the washing machine, and the forward rotation spring and the reverse rotation spring are used for controlling the forward rotation and the reverse rotation of the washing motor respectively.

[0025] Further, a switching wheel group is arranged in the shell, the switching wheel group comprises a switching wheel and a switching swing arm, the switching wheel is connected with the timing main shaft through a transmission gear group, and one end of the switching swing arm is connected with the switching wheel, and the other end of the switching swing arm is in abutment with the switching spring; the switching spring can be driven by the switching wheel group to reciprocate between the forward rotation spring and the reverse rotation spring, so that the switching spring is switched between the state of being in abutment with the forward rotation spring and the state of being in abutment with the reverse rotation spring.

[0026] The power-off protection mode of the washing timer is as follows: when the washing timer ends timing, the timing main shaft can rotate to the original position, so that the notch on the protection cam is aligned with the protection lever, the protection lever is switched from abutment with the outer circumferential surface of the protection cam to abutment in the notch of the protection cam, so that the protection lever retreats relative to the first protection spring, the first protection spring can be elastically restored to move away from the second protection spring, the first protection spring is disconnected from the second protection spring, the first protection spring is connected with the conductive spring in the main contact spring group, the second protection spring is connected with the switching spring in the control spring group, and therefore the disconnection of the first protection spring and the second protection spring can directly cause the connection between the main contact spring group and the control spring group to be cut off, so that the control spring group cannot be powered when the timing ends, and therefore even if the switching spring in the main contact spring group is in abutment with the forward rotation spring or the reverse rotation spring when the timing ends, the washing motor cannot be started, and the washing timer and the washing motor in the washing machine are protected.

[0027] The washing timer has the following beneficial effects:

[0028] 1. The protection spring group is added, the main contact spring group and the control spring group are communicated by the protection spring group, and the protection spring group can be contacted or disconnected under the driving of the protection wheel group, so that when the timing ends, even if the control spring group is not disconnected, the current at the main contact spring group cannot flow to the control spring group due to the disconnection of the protection spring group, thereby protecting the washing timer and the washing motor;

[0029] 2. The connection between the main contact spring group and the protection spring group is realized by the mutual insertion of the lower connecting plate of the second protection spring and the lower connecting plate of the conductive spring, and the upper connecting groove and the lower connecting groove are respectively arranged on the first spring seat and the second spring seat, so that the main contact spring group and the protection spring group can be produced respectively, and then connected during the assembly of the timer, and the connection mode is very simple, thereby effectively reducing the production difficulty of the washing timer;

[0030] 3. The connection relationship between the spring groups is simple and clear, the main contact spring group and the protection spring group are stacked up and down, which facilitates the connection of the two and effectively saves the occupied space, and ensures that the overall size of the washing timer will not be increased due to the arrangement of the protection spring group;

[0031] 4. The main control wheel group, the washing wheel group, the buzzer wheel group and the switching wheel group are arranged, so that the washing timer can control the functions of soaking, buzzing, forward and reverse washing, and the washing timer is diversified. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a structural schematic view of the utility model.

[0033] Figure 2 It is a schematic view of the internal structure of the utility model.

[0034] Figure 3 It is an explosion schematic view of the utility model.

[0035] Figure 4 It is a cooperation schematic view of the main contact spring group and the protection spring group in the utility model.

[0036] Figure 5 It is a structural schematic view of the main contact spring group and the first spring seat in the utility model.

[0037] Figure 6 It is a structural schematic view of the protection spring group and the second spring seat in the utility model.

[0038] Figure 7 It is a connection schematic view of the conductive spring and the second protection spring in the utility model.

[0039] Figure 8Is the cooperation schematic view of the protection wheel group and the protection spring piece group in the utility model.

[0040] Figure 9 Is the cooperation schematic view of the main control wheel group, the moving spring piece and the static spring piece in the utility model.

[0041] Figure 10 Is the cooperation schematic view of the washing wheel group, the static spring piece and the conductive spring piece in the utility model.

[0042] Figure 11 Is the cooperation schematic view of the buzzer wheel group, the static spring piece and the buzzer spring piece in the utility model.

[0043] Figure 12 Is the structure schematic view of the buzzer cam and the main control cam in the utility model.

[0044] Figure 13 Is the cooperation schematic view of the control spring piece group and the switching wheel group in the utility model.

[0045] Fig. number: 1, shell;11, first spring seat;111, upper connecting groove;12, second spring seat;121, lower connecting groove;13, third spring seat;14, transmission gear group;15, timing motor;

[0046] 2, timing main shaft;

[0047] 3, control spring piece group;31, forward rotation spring piece;32, reverse rotation spring piece;33, switching spring piece;

[0048] 4, main contact spring piece group;41, moving spring piece;42, static spring piece;43, conductive spring piece;431, upper connecting plate;432, clamping groove;433, abutting rib;44, buzzer spring piece;

[0049] 5, protection spring piece group;51, first protection spring piece;52, second protection spring piece;521, lower connecting plate;

[0050] 6, protection wheel group;61, protection cam;62, protection lever;

[0051] 7, main control wheel group;71, main control cam;72, main control lever;

[0052] 8, soaking wheel group;81, soaking cam;82, soaking lever;

[0053] 9, buzzer wheel group;91, buzzer cam;911, driving rib;92, buzzer lever;

[0054] 10, switching wheel group;101, switching wheel;102, switching swing arm. DETAILED DESCRIPTION

[0055] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0056] It should be understood that although the terms upper, middle, lower, top, one end, etc., appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for ease of understanding, and are not used to define any directional or sequential restrictions.

[0057] Example

[0058] Combination Figures 1 to 13 The electric washing timer with a power failure protection structure includes a housing 1, a timing spindle 2, a control spring group 3, and a main contact spring group 4. The timing spindle 2 is rotatably mounted inside the housing 1. The control spring group 3 is used to communicate with the washing motor inside the washing machine. The main contact spring group 4 includes at least a moving spring 41 and a stationary spring 42 for connecting the power cord, and the control spring group 3 is connected to the main contact spring group 4. It also includes a protection spring group 5 and a protection wheel group 6. The protection spring group 5 includes a first protection spring 51. The main contact spring group 4 is connected to the control spring group 3 via the protection spring group 5 and the second protection spring 52. The protection wheel group 6 is connected to the timing main shaft 2 and the protection wheel group 6 is also connected to the first protection spring 51. The first protection spring 51 can be driven by the protection wheel group 6 to move closer to or further away from the second protection spring 52, so that the first protection spring 51 and the second protection spring 52 are in contact or disconnected, thereby controlling the on / off connection between the main contact spring group 4 and the control spring group 3.

[0059] Combination Figure 2 and Figure 3 As shown, in this embodiment, a timing motor 15 is also connected to the lower side of the outer casing 1. The timing motor 15 forms a transmission with the transmission gear set 14 through the gear on its output shaft, so that the timing motor 15 can drive the timing main shaft 2 and the switching wheel set 10 through the transmission gear set 14.

[0060] Combination Figures 4 to 7 As shown, in this embodiment, the main contact spring group 4 further includes a conductive spring 43, which is connected to the second protective spring 52, and the first protective spring 51 is connected to the control spring group 3.

[0061] Combination Figures 5 to 7As shown, one end of the conductive reed 43 is provided with an upper connecting plate 431 in the embodiment, one end of the second protective reed 52 is provided with a lower connecting plate 521, and the upper connecting plate 431 is further provided with a clamping groove 432, and the lower connecting plate 521 can be inserted into the clamping groove 432 and abut against the inner wall of the clamping groove 432, so as to realize the connection between the conductive reed 43 and the second protective reed 52.

[0062] As shown in Figure 7 , the upper connecting plate 431 is further provided with an abutting rib 433 inside the groove wall of the clamping groove 432, and when the lower connecting plate 521 is inserted into the clamping groove 432, the abutting rib 433 can abut against the two side walls of the lower connecting plate 521.

[0063] As shown in Figures 4 to 7 , the first reed seat 11 and the second reed seat 12 are further stacked in the shell 1 in the embodiment, the main reed group 4 is connected to the first reed seat 11, the protective reed group 5 is connected to the second reed seat 12, the lower side of the first reed seat 11 is provided with an upper connecting groove 111, the upper side of the second reed seat 12 is provided with a lower connecting groove 121, the upper connecting groove 111 and the lower connecting groove 121 are combined to form a connecting cavity, and the upper connecting plate 431 and the lower connecting plate 521 are located in the connecting cavity.

[0064] As shown in Figure 2 , Figure 3 , and Figure 13 , the third reed seat 13 is further provided in the shell 1 in the embodiment, and the control reed group 3 is connected to the third reed seat 13.

[0065] As shown in Figure 2 , Figure 3 , and Figure 8 , the protective wheel group 6 in the embodiment includes a protective cam 61 which is connected to the timing main shaft 2 and an oscillatable protective lever 62, one end of the protective lever 62 is hinged to the shell 1, the inner side of the other end of the protective lever 62 abuts against the outer circumferential surface of the protective cam 61, and the outer side of the other end of the protective lever 62 abuts against the first protective reed 51.

[0066] As shown in Figure 2 , Figure 3 , and Figure 9As shown, in this embodiment, a main control wheel assembly 7 is also provided inside the outer casing 1. The main control wheel assembly 7 includes a main control cam 71 that is driven to the timing spindle 2 and a main control lever 72 that can be oscillated. One end of the main control lever 72 is hinged inside the outer casing 1, and the inner side of the other end of the main control lever 72 abuts against the outer peripheral surface of the main control cam 71. The outer side of the other end abuts against the moving spring 41. The moving spring 41 can be driven by the main control wheel assembly 7 to move closer to or further away from the stationary spring 42, thereby controlling the contact or disconnection between the moving spring 41 and the stationary spring 42.

[0067] Among them, such as Figure 9 As shown, in this embodiment, a notch is provided on the outer peripheral surface of the main control cam 71. When the timing spindle 2 returns to its original position after the timing ends, the notch on the main control cam 71 can be aligned with the main control lever 72, so that the main control lever 72 switches from abutting against the outer peripheral surface of the main control cam 71 to abutting against the notch of the main control cam 71, causing the main control lever 72 to swing and move away from the moving spring 41. At this time, the moving spring 41 will elastically recover and move away from the stationary spring 42, causing the two to disconnect. Since the moving spring 41 and the stationary spring 42 are connected to the external power line, the disconnection of the two will cause the washing timer to lose power.

[0068] Combination Figure 2 , Figure 3 and Figure 10 As shown, in this embodiment, a soaking wheel assembly 8 is also provided inside the outer casing 1. The soaking wheel assembly 8 includes a soaking cam 81 that is driven to the timing spindle 2 and a swayable soaking lever 82. One end of the soaking lever 82 is hinged inside the outer casing 1, and the inner side of the other end of the soaking lever 82 abuts against the outer peripheral surface of the soaking cam 81. The outer side of the other end abuts against the conductive spring 43. The conductive spring 43 can be driven by the soaking wheel assembly 8 to move closer to or further away from the stationary spring 42, thereby controlling the contact or disconnection between the conductive spring 43 and the stationary spring 42.

[0069] Among them, such as Figure 10As shown in the figure, the soaking cam 81 is provided with several protrusions, when the timing main shaft 2 rotates in timing, the soaking lever 82 will switch between the state of abutting the outer circumferential surface of the soaking cam 81 and the state of abutting the protrusions on the soaking cam 81; when the soaking lever 82 abuts on the outer circumferential surface of the soaking cam 81, the conductive reed 43 contacts the static reed 42, the current in the main reed group 4 can be transmitted to the control reed group 3 through the conductive reed 43, and the control reed group 3 can supply power to the washing motor to make the washing machine in the washing state; when the soaking lever 82 abuts on the protrusions of the soaking cam 81, the conductive reed 43 is disconnected from the static reed 42, at this time the current in the main reed group 4 cannot supply power to the control reed group 3, so the washing motor cannot be started to make the washing machine in the soaking state; thus the soaking wheel group 8 can realize the operation of the washing machine in the state of washing-soaking-washing again-soaking again-….

[0070] Combining Figure 2 , Figure 3 and Figure 11 , in the embodiment, the main reed group 4 further includes a buzzer reed 44, the buzzer reed 44 is connected to the buzzer device of the washing machine, and the shell 1 is further provided with a buzzer wheel group 9, the buzzer wheel group 9 includes a buzzer cam 91 drivingly connected to the timing main shaft 2 and a buzzer lever 92 swingably arranged, one end of the buzzer lever 92 is hingedly connected to the shell 1, the other end of the buzzer lever 92 abuts against the outer circumferential surface of the buzzer cam 91, and the outer side of the other end of the buzzer lever 92 abuts against the buzzer reed 44, the buzzer reed 44 can be driven by the buzzer wheel group 9 to approach or move away from the moving reed 41, thereby controlling the contact or disconnection between the buzzer reed 44 and the moving reed 41.

[0071] As shown in the figure, Figure 12 , in the embodiment, the buzzer cam 91 and the main control cam 71 are integrally formed, the buzzer cam 91 includes a driving rib 911 protruding therefrom, and the buzzer cam 91 drives the buzzer lever 92 to swing through the driving rib 911.

[0072] As shown in the figure, Figure 12As shown in the figure, in this embodiment, when the timing spindle 2 rotates back to its original position after the timing is completed, the drive rib 911 on the buzzer cam 91 can push the buzzer lever 92 to swing. The buzzer lever 92 will then drive the buzzer reed 44 to move closer to the stationary reed 42 and make them contact each other. This allows the buzzer reed 44 to supply power to the buzzer device in the washing machine and generate a buzzer. When the timing spindle 2 has completely rotated back to its original position, since the drive rib 911 has passed the buzzer lever 92, the buzzer lever 92 loses its force and swings back, causing the buzzer reed 44 to separate from the stationary reed 42 again, thus ending the buzzer.

[0073] Combination Figure 2 , Figure 3 and Figure 13 As shown, in this embodiment, the control reed group 3 includes a forward rotation reed 31, a reverse rotation reed 32, and a switching reed 33 located between them. The switching reed 33 is connected to the first protection reed 51. Both the forward rotation reed 31 and the reverse rotation reed 32 are connected to the washing motor of the washing machine. The forward rotation reed 31 and the reverse rotation reed 32 are used to control the forward and reverse rotation of the washing motor, respectively.

[0074] Combination Figure 2 , Figure 3 and Figure 13 As shown, in this embodiment, a switching wheel assembly 10 is also provided inside the outer casing 1. The switching wheel assembly 10 includes a switching wheel 101 and a switching swing arm 102. The switching wheel 101 is connected to the timing main shaft 2 through a transmission gear set 14. One end of the switching swing arm 102 is connected to the switching wheel 101, and the other end abuts against the switching spring 33. The switching spring 33 can be driven by the switching wheel assembly 10 to swing back and forth directly between the forward spring and the reverse spring 32, thereby switching the switching spring 33 back and forth between the state of contacting the forward spring 31 and the state of contacting the reverse spring 32.

[0075] The power-off protection mode of the embodiment is as follows: when the washing timer ends timing, the timing spindle 2 can rotate to the original position, so that the notch on the protection cam 61 is aligned with the protection lever 62, the protection lever 62 is switched from abutting against the outer circumferential surface of the protection cam 61 to abutting within the notch of the protection cam 61, so that the protection lever 62 retreats relative to the first protection spring 51, the first protection spring 51 can elastically recover to be away from the second protection spring 52, so that the first protection spring 51 is disconnected with the second protection spring 52, and because the first protection spring 51 is connected with the conductive spring 43 in the main contact spring group 4, and the second protection spring 52 is connected with the switching spring 33 in the control spring group 3, therefore, the disconnection of the first protection spring 51 and the second protection spring 52 can directly cause the communication between the main contact spring group 4 and the control spring group 3 to be cut off, so as to ensure that the control spring group 3 cannot be electrified again at the timing end, and therefore, even if the switching spring 33 in the main contact spring group 4 still contacts the forward rotation spring 31 or the reverse rotation spring 32 at the timing end, the washing motor cannot be started, and the washing timer and the washing motor in the washing machine are protected.

[0076] The embodiment has the advantages that the protection spring group and the protection wheel group are added to realize the power-off protection function of the washing timer, so as to ensure that the control spring group cannot be electrified again at the timing end, and even if the control spring group is still in the on state, the washing timer and the washing motor in the washing machine cannot be burned out.

[0077] The above specific embodiments are only an explanation of the utility model, and are not a limitation of the utility model, and the person skilled in the art can make modifications to the embodiments without creative contribution according to the needs after reading the specification, but as long as the modifications are within the scope of the claims of the utility model, the utility model is protected by the patent law.

Claims

1. An electric washing timer with a power failure protection structure, characterized in that, The utility model relates to a washing machine control switch, which comprises: a housing (1); a timing main shaft (2) rotatably arranged in the housing (1); a control spring group (3) for communication with a washing motor in a washing machine; a main contact spring group (4) comprising at least a moving spring (41) and a static spring (42) for connecting a power line, the control spring group (3) being in communication with the main contact spring group (4); characterized in that it further comprises: a protection spring group (5) comprising a first protection spring (51) and a second protection spring (52), the main contact spring group (4) being in communication with the control spring group (3) through the protection spring group (5); a protection wheel group (6) in driving connection with the timing main shaft (2), the protection wheel group (6) further being in driving cooperation with the first protection spring (51); the first protection spring (51) being capable of being driven by the protection wheel group (6) to approach or move away from the second protection spring (52), so that the first protection spring (51) is in contact with or separated from the second protection spring (52), thereby realizing the control of the communication between the main contact spring group (4) and the control spring group (3).

2. The electric washing timer with the power-off protection structure according to claim 1, characterized in that: the main contact spring group (4) further comprising a conductive spring (43), the conductive spring (43) being connected with the second protection spring (52), and the first protection spring (51) being in communication with the control spring group (3).

3. The electric washing timer with the power-off protection structure according to claim 2, characterized in that: one end of the conductive spring (43) protrudes an upper connecting plate (431), one end of the second protection spring (52) protrudes a lower connecting plate (521), the upper connecting plate (431) further has a clamping groove (432) formed therein, and the lower connecting plate (521) is capable of being inserted into the clamping groove (432) and abutting against the inner wall of the clamping groove (432), thereby realizing the connection between the conductive spring (43) and the second protection spring (52).

4. The electric washing timer with the power-off protection structure according to claim 3, characterized in that: the housing (1) further has a first spring seat (11) and a second spring seat (12) stacked vertically therein, the main contact spring group (4) being connected to the first spring seat (11), and the protection spring group (5) being connected to the second spring seat (12), the lower side of the first spring seat (11) having an upper connecting groove (111) formed therein, and the upper side of the second spring seat (12) having a lower connecting groove (121) formed therein, the upper connecting groove (111) and the lower connecting groove (121) being combined to form a connecting cavity, and the upper connecting plate (431) and the lower connecting plate (521) being located in the connecting cavity.

5. The electric washing timer with the power-off protection structure according to claim 1, characterized in that: the protection wheel group (6) comprises a protection cam (61) in driving connection with the timing main shaft (2) and an oscillatable protection lever (62), one end of the protection lever (62) being hingedly connected to the housing (1), the inner side of the other end of the protection lever (62) abutting against the outer circumferential surface of the protection cam (61), and the outer side of the other end of the protection lever (62) abutting against the first protection spring (51).

6. The electric washing timer with the power-off protection structure according to claim 3, characterized in that: The housing (1) is further provided with a main control wheel set (7), which comprises a main control cam (71) drivingly connected to the timing main shaft (2) and a main control lever (72) swingably arranged, one end of the main control lever (72) being hinged to the housing (1), the inner side of the other end of the main control lever (72) abutting against the outer periphery of the main control cam (71), and the outer side of the other end of the main control lever (72) abutting against the moving spring piece (41), the moving spring piece (41) being capable of being driven by the main control wheel set (7) to approach or move away from the static spring piece (42) so as to control the contact or disconnection between the moving spring piece (41) and the static spring piece (42).

7. The electric washing timer having the power-off protection structure according to claim 6, wherein: The housing (1) is further provided with a soaking wheel set (8), which comprises a soaking cam (81) drivingly connected to the timing main shaft (2) and a soaking lever (82) swingably arranged, one end of the soaking lever (82) being hinged to the housing (1), the inner side of the other end of the soaking lever (82) abutting against the outer periphery of the soaking cam (81), and the outer side of the other end of the soaking lever (82) abutting against the conductive spring piece (43), the conductive spring piece (43) being capable of being driven by the soaking wheel set (8) to approach or move away from the static spring piece (42) so as to control the contact or disconnection between the conductive spring piece (43) and the static spring piece (42).

8. The electric washing timer with power-off protection structure according to claim 1, characterized in that: The main contact spring piece set (4) further comprises a buzzer spring piece (44) connected to the buzzer of the washing machine, and the housing (1) is further provided with a buzzer wheel set (9), which comprises a buzzer cam (91) drivingly connected to the timing main shaft (2) and a buzzer lever (92) swingably arranged, one end of the buzzer lever (92) being hinged to the housing (1), the inner side of the other end of the buzzer lever (92) abutting against the outer periphery of the buzzer cam (91), and the outer side of the other end of the buzzer lever (92) abutting against the buzzer spring piece (44), the buzzer spring piece (44) being capable of being driven by the buzzer wheel set (9) to approach or move away from the moving spring piece (41) so as to control the contact or disconnection between the buzzer spring piece (44) and the moving spring piece (41).

9. The electric washing timer having a power-off protection structure according to claim 8, wherein: The control spring piece set (3) comprises a forward rotation spring piece (31), a reverse rotation spring piece (32) and a switching spring piece (33) located between the forward rotation spring piece (31) and the reverse rotation spring piece (32), the switching spring piece (33) being in communication with the first protection spring piece (51), the forward rotation spring piece (31) and the reverse rotation spring piece (32) being in communication with the washing motor of the washing machine, and the forward rotation spring piece (31) and the reverse rotation spring piece (32) being respectively used for controlling the forward rotation and the reverse rotation of the washing motor.

10. The electric washing timer having a power-off protection structure according to claim 9, wherein: The housing (1) is further provided with a switching wheel set (10), which comprises a switching wheel (101) and a switching swing arm (102). The switching wheel (101) is in transmission connection with the timing main shaft (2) through a transmission gear set (14). One end of the switching swing arm (102) is connected to the switching wheel (101), and the other end abuts against a switching reed (33). The switching reed (33) can be driven by the switching wheel set (10) to reciprocate directly between the forward reed and the reverse reed (32), so that the switching reed (33) reciprocates between the state of contacting the forward reed (31) and the state of contacting the reverse reed (32).

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