A timer and washing machine

Abstract

The utility model provides a kind of timer and washing machine, it is related to timer field, it includes shell, timing mechanism, timing static contact piece, timing dynamic contact piece, a pair of program contact piece and drive mechanism, one end of the timing static contact piece and one end of the timing dynamic contact piece are oppositely arranged and installed in the shell, the timing mechanism is installed in the shell, when the timing mechanism starts, the timing dynamic contact piece continuously presses the timing static contact piece;Two the program contact piece is oppositely installed in the shell, the other end of the timing dynamic contact piece is between two the program contact piece position, the drive mechanism is used to intermittent drive the timing dynamic contact piece repeatedly presses two the program contact piece.The utility model has the effect that washing machine's positive and negative rotation winding can be intermittently connected.

Description

Technical Field

[0001] This utility model relates to the field of timer technology, and more specifically, to a timer and a washing machine. Background Technology

[0002] A timer is an electronic or mechanical device that can automatically perform a specific task at preset time intervals. Motor-driven mechanical timers are one type, relying on the coordinated action of a motor, gear transmission mechanism, and contact assembly. When the motor is powered on, its rotation drives the gear assembly, which in turn closes the contacts, connecting the power supply circuit to the load. When the preset time is reached, the motor stops, the contacts open, and the power supply circuit to the load is cut off. This type of timer is commonly used in microwave ovens.

[0003] An existing timer, such as the improved timer disclosed in application number CN202110379074.0, includes a base plate, a housing, and a power setting shaft, with the housing mounted on the base plate. The housing is equipped with a timing adjustment shaft, a drive motor, a timing adjustment gear, a timing cam, a timing lever, a timing stationary contact, a timing moving contact, an output gear, gears one, two, and three, a time change mechanism, gears eight, nine, and ten, a power timing cam, a power setting gear, a timing moving contact, and a power timing lever. After the user sets the timing time by rotating the timing adjustment shaft and sets the power by rotating the power setting shaft, the timing moving contact, under the pressure of the first pawl of the timing lever, abuts against one end of the timing stationary contact. Similarly, under the pressure of the second pawl, the timing moving contact abuts against the other end of the timing moving contact, thus connecting the microwave oven's circuit and initiating operation.

[0004] The aforementioned timer is designed for microwave ovens, which only require a single timing contact and a single timer contact to press against each other to control the microwave oven's operation. However, when this timer is applied to washing machines, it cannot meet the purpose of controlling the forward and reverse rotation of the washing machine's drum. Therefore, there is an urgent need for a timer that can meet the requirements of washing machine operation. Utility Model Content

[0005] Based on this, in order to solve the problem of not being able to meet the working requirements of the washing machine, this utility model provides a timer, the specific technical solution of which is as follows: A timer includes a housing, a timing mechanism, a timing stationary contact, a timing moving contact, a pair of program contacts, and a driving mechanism. One end of the timing stationary contact and one end of the timing moving contact are disposed opposite to each other within the housing. The timing mechanism is installed in the housing. When the timing mechanism is activated, the timing moving contact continuously presses against the timing stationary contact. The two program contacts are disposed opposite to each other within the housing, with the other end of the timing moving contact positioned between the two program contacts. The driving mechanism is used to intermittently drive the timing moving contact to repeatedly press against the two program contacts.

[0006] By adopting the above technical solution, the two program contacts are respectively connected to the forward and reverse windings of the washing machine. When in use, the timing mechanism is activated, driving the timing moving contact to press against the timing stationary contact, connecting the motor in the timing mechanism, and starting the countdown. At the same time, the driving mechanism intermittently drives the timing moving contact to repeatedly press against the two program contacts, thereby meeting the working requirements of the washing machine. Moreover, this structure only requires some adjustments to the existing microwave oven timer to meet the needs of the washing machine.

[0007] Furthermore, the driving mechanism includes a swing lever and a first driving component. The swing lever is rotatably mounted inside the housing. One end of the swing lever is fixedly connected to one end of the timing contact located between the two program contacts. The first driving component is used to drive the other end of the swing lever to swing intermittently.

[0008] Further, the first driving assembly includes a driving gear and a driving disk. The driving gear is rotatably mounted inside the housing and meshes with the power output gear in the timing mechanism. The driving disk is coaxially fixedly mounted on the driving gear. The driving disk is provided with circumferentially spaced clearance grooves. A trigger block is provided at the end of the swing lever away from the timing movable contact piece. The trigger block is located in the clearance groove, and the side wall of the trigger block opposite to the clearance groove is provided with an inclined surface. When the trigger block is in the clearance groove, the timing movable contact piece is in its natural state and abuts against one of the program contact pieces. When the trigger block abuts against the outer surface of the driving disk, the swing lever swings until the timing movable contact piece abuts against the other program contact piece.

[0009] Furthermore, the drive gear is slidably mounted on the housing in a vertical direction, and the housing is equipped with a frequency adjustment mechanism. The frequency adjustment mechanism is used to adjust the timing when the trigger block moves on the outer surface of the drive disk, causing the drive gear to slide until the trigger block leaves the drive disk.

[0010] Further, the frequency adjustment mechanism includes an adjustment disk, a plurality of protrusions, a plurality of guide blocks, an elastic element, and a second drive assembly. The adjustment disk is located directly above the drive disk and is rotatably mounted on the housing. The plurality of protrusions are circumferentially spaced along the side of the adjustment disk near the drive disk, and the plurality of guide blocks are circumferentially spaced along the side of the drive disk near the adjustment disk. Each protrusion is located between two adjacent guide blocks. Each guide block has an inclined guide surface on both sides in the arrangement direction. The top of each guide block corresponds to the junction where it enters the clearance groove from the outer surface of the drive disk, and the bottom of each guide block corresponds to the outer surface of the drive disk and the clearance groove, respectively. The elastic element is sleeved on the shaft of the drive gear, and both ends of the elastic element abut against the drive gear and the housing, respectively. The second drive assembly is used to drive the adjustment disk to rotate.

[0011] Furthermore, the second drive assembly includes an adjusting shaft, a drive gear, a transition gear, a driven gear, and a limiting member. The adjusting shaft is rotatably mounted on the housing, with one end extending out of the housing. The drive gear is sleeved on the adjusting shaft, and the driven gear is coaxially fixed to the adjusting disc. The transition gear meshes with both the drive gear and the driven gear. The limiting member is used to restrict the rotational position of the adjusting shaft.

[0012] Furthermore, the limiting member includes an elastic sheet and a protrusion block. Both ends of the elastic sheet are fixedly installed on the housing, and the protrusion block is fixedly installed on the shaft wall of the adjusting shaft. The protrusion block abuts against the elastic sheet, and the elastic sheet is in a bent state.

[0013] Furthermore, a limiting groove is provided on the outer side of the driven gear along the circumferential direction, and a limiting block is fixedly installed on the inner wall of the housing corresponding to the position of the limiting groove. The limiting block is slidably installed in the limiting groove. The distance that the limiting block slides in the limiting groove is the maximum adjustment distance of the protrusion between two adjacent guide blocks.

[0014] Furthermore, conductive contacts are installed at the positions where the timer stationary contact and the timer moving contact press against each other, as well as at the positions where the timer moving contact and the program contact press against each other.

[0015] Accordingly, this utility model also provides a washing machine, including a main body and the timer, wherein the two program contacts are electrically connected to the forward and reverse windings of the main body. Attached Figure Description

[0016] The present invention can be further understood from the following description taken in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale; rather, the focus is on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a top view of the overall internal structure of an embodiment of the present invention; Figure 3 This is a schematic diagram of the overall structure of one embodiment of the present utility model from another perspective; Figure 4 This is a schematic diagram showing the position between the swing lever and the drive disc according to an embodiment of the present invention; Figure 5 This is a top view of the interaction between the swing lever and the drive disc according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the cooperation structure between the adjustment disc and the drive disc according to an embodiment of the present invention; Figure 7 yes Figure 6 A magnified view of part A in the image; Figure 8 This is a schematic diagram of the bottom of the upper shell according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Housing; 11. Upper housing; 12. Lower housing; 13. Snap fastener; 14. M pin; 15. Limiting block; 2. Timing mechanism; 21. Power output gear; 22. Motor; 3. Timing stationary contact; 31. Pin No. 1; 4. Timing moving contact; 5. Program contact; 6. Drive mechanism; 61. Swing lever; 611. Trigger block; 62. Drive gear; 63. Drive disc; 631. Alternating groove; 7. Frequency adjustment mechanism; 71. Adjustment disc; 72. Protrusion; 73. Guide block; 731. Inclined guide surface; 74. Elastic element; 75. Adjustment shaft; 76. Drive gear; 77. Transition gear; 78. Driven gear; 781. Limiting groove; 79. Elastic piece; 70. Protrusion; 8. Conductive contact. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with its embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit its scope of protection.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] In this utility model, "first" and "second" do not represent a specific quantity or order, but are merely used to distinguish names.

[0023] like Figure 1 and Figure 2 As shown, a timer according to one embodiment of the present invention includes a housing 1, a timing mechanism 2, a timing stationary contact 3, a timing moving contact 4, a pair of program contacts 5, and a driving mechanism 6. The housing 1 includes an upper shell 11 and a lower shell 12, which are interlocked and detachably connected by a snap-fit ​​13, facilitating disassembly for maintenance of the components inside the housing 1. One end of the timing stationary contact 3 and one end of the timing moving contact 4 are respectively mounted in the lower shell 12. The timing mechanism 2 is mounted on the housing 1. When the timing mechanism 2 is activated, the timing movable contact 4 continuously presses against the timing stationary contact 3; the structure and principle of the timing mechanism 2 are the same as those of the timing device in an improved timer disclosed in application number CN202110379074.0, so this part will not be described again; the two program contacts 5 are fixedly installed on the lower shell 12, and the other end of the timing movable contact 4 is located between the two program contacts 5. The driving mechanism is used to intermittently drive the timing movable contact 4 to repeatedly press against the two program contacts 5.

[0024] Connect the two program contacts 5 to the forward and reverse windings of the washing machine respectively. When in use, the timer mechanism 2 is activated, driving the timer moving contact 4 to press against the timer stationary contact 3, connecting the motor 22 in the timer mechanism 2, and starting the countdown. At the same time, the timer moving contact 4 is intermittently driven by the driving mechanism to repeatedly press against the two program contacts 5, thereby meeting the working needs of the washing machine.

[0025] Specifically, such as Figure 2 and Figure 3As shown, the end of the timer stationary contact 3 away from the timer moving contact 4 is provided with a pin 31, which is the power supply live wire input terminal; one end of the motor 22 in the timer mechanism 2 is electrically connected to the timer moving contact 4, which serves as the live wire output terminal. The housing 1 is equipped with an M pin 14, which is the neutral wire input terminal of the motor 22 in the timer mechanism 2. When the timer moving contact 4 presses against the timer stationary contact 3, the motor 22 in the timer mechanism 2 can be started.

[0026] Specifically, such as Figure 2 , Figure 4 and Figure 5 As shown, the driving mechanism includes a swing lever 61 and a first driving assembly. The swing lever 61 is rotatably mounted on the lower housing 12, and one end of the swing lever 61 is fixedly connected to the end of the timing movable contact 4 located between the two program contacts 5. The first driving assembly is used to drive the other end of the swing lever 61 to swing intermittently. The first driving assembly includes a driving gear 62 and a driving disk 63. The driving gear 62 is rotatably mounted on the lower housing 12 and meshes with the power output gear 21 in the timing mechanism 2. The rotation direction of the driving gear 62 is as follows: Figure 5 As shown; the drive disc 63 is coaxially fixedly installed on the side of the drive gear 62 near the upper shell 11. The outer wall of the drive disc 63 is provided with circumferentially spaced clearance grooves 631. The end of the swing lever 61 away from the timing movable contact 4 is provided with a trigger block 611. The trigger block 611 is located in the clearance groove 631. The side wall of the trigger block 611 opposite to the clearance groove 631 is provided with an inclined surface. When the trigger block 611 is in the clearance groove 631, the timing movable contact 4 is in its natural state and presses against one of the program contacts 5. When the trigger block 611 abuts against the outer surface of the drive disc 63, the swing lever 61 swings until the timing movable contact 4 presses against the other program contact 5.

[0027] Therefore, when the timing mechanism 2 is started, the power output gear 21 in the timing mechanism 2 will simultaneously drive the drive gear 62 to rotate, which in turn drives the drive disc 63 to rotate. Through the inclined guide effect on the trigger block 611 and the elastic effect of the timing moving contact 4, the swing lever 61 is intermittently driven to rotate, which in turn drives the timing moving contact 4 to intermittently and repeatedly press against the two program contact 5, thereby driving the washing machine motor 22 to rotate in both directions and complete the work of the washing machine.

[0028] Furthermore, such as Figure 6 and Figure 7As shown, the drive gear 62 is rotatably mounted on the cylindrical shaft of the lower housing 12. The drive gear 62 is slidably mounted on the lower housing 12 in the vertical direction, that is, the shaft is stationary, and the drive gear 62 can rotate or slide along the shaft; and the tooth height of the power output gear 21 that meshes with the drive gear 62 is greater than the sliding distance of the drive gear 62, that is, the drive gear 62 is always meshed with the power output gear 21 during the sliding process.

[0029] like Figure 4 , Figure 6 and Figure 7 As shown, the housing 1 is equipped with a frequency adjustment mechanism 7. The frequency adjustment mechanism 7 is used to adjust the timing when the trigger block 611 moves on the outer surface of the drive disk 63, causing the drive gear 62 to slide until the trigger block 611 leaves the drive disk 63. The frequency adjustment mechanism 7 includes an adjustment disk 71, several protrusions 72, several guide blocks 73, an elastic element 74, and a second drive assembly. The adjustment disk 71 is located directly above the drive disk 63 and is rotatably mounted on the shaft of the drive gear 62, that is, the adjustment disk 71 is sleeved on the shaft of the drive gear 62 and only rotates relative to it. The protrusions 72 are in a triangular shape, with the tips of the protrusions 72 facing vertically towards the drive disk 63 and abutting against the drive disk 63, that is, the tips of the protrusions 72 can slide on the upper surface of the drive disk 63. Several protrusions 72 are adjusted along the adjustment disk 71. The disc 71 is circumferentially spaced at equal intervals on the side near the driving disc 63. Several guide blocks 73 are circumferentially spaced at equal intervals on the side of the driving disc 63 near the adjusting disc 71. Each protrusion 72 is located between two adjacent guide blocks 73. The guide blocks 73 have inclined guide surfaces 731 on both sides in the arrangement direction. The top of the guide block 73 is pointed and corresponds to the junction where the guide block 73 enters the clearance groove 631 from the outer surface of the driving disc 63. The lowest points on both sides of the guide block 73 correspond to the outer surface of the driving disc 63 and the clearance groove 631, respectively. The elastic element 74 is a spring and is sleeved on the shaft of the driving gear 62. The two ends of the elastic element 74 abut against the driving gear 62 and the housing 1, respectively. The second driving assembly is used to drive the adjusting disc 71 to rotate.

[0030] The second drive assembly drives the adjustment disc 71 to rotate, adjusting the position of the protrusion 72 between two adjacent guide blocks 73. When the distance between the protrusion 72 and the top of the guide block 73 closest to the drive disc 63 in the rotation direction is less than the distance of a single section of the outer surface of the drive disc 63, the action of the protrusion 72 and the guide block 73 can push the drive disc 63 downward and compress the elastic element 74, causing the trigger block 611 to leave the outer surface of the drive disc 63. This allows the timing movable contact 4 to reset and press against another program contact 5 in advance. Therefore, if the program contact 5 pressed by the timing movable contact 4 in its natural state is connected to the forward winding of the washing machine, the forward rotation time of the washing machine can be greater than the reverse rotation time, thereby achieving the adjustment of the washing mode according to the clothes being washed.

[0031] Furthermore, such as Figure 2 and Figure 7 As shown, the second drive assembly includes an adjusting shaft 75, a drive gear 76, a transition gear 77, a driven gear 78, and a limiting member. The adjusting shaft 75 is rotatably mounted on the lower housing 12, with one end extending out of the upper housing 11. The drive gear 76 is sleeved on the adjusting shaft 75, and the driven gear 78 is coaxially fixed to the adjusting disc 71. A pair of transition gears 77 are provided, both of which are rotatably mounted on the lower housing 12 and mesh with each other. The two transition gears 77 mesh with the drive gear 76 and the driven gear 78, respectively. Thus, the operator can adjust the position of the adjusting disc 71 by rotating the adjusting shaft 75, thereby adjusting the position of the protrusion 72.

[0032] The limiting component is used to restrict the rotational position of the adjusting shaft 75. The limiting component includes an elastic sheet 79 and a protrusion 70. Both ends of the elastic sheet 79 are fixedly installed on the housing 1. The protrusion 70 is fixedly installed on the shaft wall of the adjusting shaft 75. The protrusion 70 extends circumferentially along the adjusting shaft 75 and abuts against the elastic sheet 79, which is in a bent state. Thus, the friction between the elastic sheet 79 and the protrusion 70 restricts the spontaneous rotation of the adjusting shaft 75, thereby restricting the adjustment disc 71 from rotating due to the influence of the driving disc 63. The adjusting shaft 75 can only be rotated manually. Furthermore, the friction between the protrusion 70 and the protrusion 70 can be increased by adding rubber blocks.

[0033] Furthermore, such as Figure 7 and Figure 8 As shown, a limiting groove 781 is provided on the outer side of the driven gear 78 along the circumferential direction. A limiting block 15 is fixedly installed on the inner wall of the housing 1 at the position corresponding to the limiting groove 781. The limiting block 15 is slidably installed in the limiting groove 781. The distance that the limiting block 15 slides in the limiting groove 781 is the maximum adjustment distance of the protrusion 72 between two adjacent guide blocks 73. This serves as a limiting function, allowing the operator to better adjust the mode.

[0034] Specifically, such as Figure 2 As shown, conductive contacts 8 are fixedly installed at the positions where the timer stationary contact 3 and the timer moving contact 4 press against each other, and at the positions where the timer moving contact 4 and the two program contacts 5 press against each other, so that the electrical conduction is smoother.

[0035] The implementation principle of a timer in this application embodiment is as follows: Two program contacts 5 are respectively connected to the forward and reverse windings of the washing machine; in use, the operator turns the timing adjustment shaft in the timing mechanism 2, triggering the timing movable contact 4 to press against the timing stationary contact 3, connecting the motor 22 in the timing mechanism 2, and starting the countdown; at the same time, the washing mode is adjusted through the rotatable adjustment shaft 75; at this time, after the motor 22 in the timing mechanism 2 rotates, it drives the drive gear 62 to rotate through the power output gear 21, thereby driving the drive disk 63 to rotate. When the trigger block 611 is in the relief groove 631 or when the trigger block 611 leaves the drive disk 63 through the action of the protrusion 72 and the guide block, the timing movable contact 4 is in a natural state and presses against one of the program contacts 5, controlling the washing machine drum to rotate in one direction. When the trigger block 611 is on the outer surface of the drive disk 63, the swing lever 61 drives the timing movable contact 4 to swing and press against the other program contact 5, controlling the washing machine drum to rotate in the other direction.

[0036] This application also discloses a washing machine, including a main body and a timer as described in the above embodiments, with two program contacts 5 electrically connected to the forward and reverse windings of the main body respectively.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A timer, characterized in that, The device includes a housing, a timing mechanism, a timing stationary contact, a timing moving contact, a pair of program contacts, and a driving mechanism. One end of the timing stationary contact and one end of the timing moving contact are disposed opposite to each other and installed in the housing. The timing mechanism is installed in the housing. When the timing mechanism is activated, the timing moving contact continuously presses against the timing stationary contact. The two program contacts are disposed opposite to each other in the housing. The other end of the timing moving contact is located between the two program contacts. The driving mechanism is used to intermittently drive the timing moving contact to repeatedly press against the two program contacts.

2. A timer according to claim 1, characterized in that, The driving mechanism includes a swing lever and a first driving component. The swing lever is rotatably mounted inside the housing. One end of the swing lever is fixedly connected to the end of the timing contact located between the two program contacts. The first driving component is used to drive the other end of the swing lever to swing intermittently.

3. A timer according to claim 2, characterized in that, The first driving assembly includes a driving gear and a driving disk. The driving gear is rotatably mounted inside the housing and meshes with the power output gear in the timing mechanism. The driving disk is coaxially fixedly mounted on the driving gear. The driving disk is provided with circumferentially spaced clearance grooves. A trigger block is provided at the end of the swing lever away from the timing movable contact piece. The trigger block is located in the clearance groove, and the side wall of the trigger block opposite to the clearance groove is provided with an inclined surface. When the trigger block is in the clearance groove, the timing movable contact piece is in its natural state and abuts against one of the program contact pieces. When the trigger block abuts against the outer surface of the driving disk, the swing lever swings until the timing movable contact piece abuts against the other program contact piece.

4. A timer according to claim 3, characterized in that, The drive gear is slidably mounted on the housing in a vertical direction. The housing is equipped with a frequency adjustment mechanism, which is used to adjust the timing when the trigger block moves on the outer surface of the drive disk, causing the drive gear to slide until the trigger block leaves the drive disk.

5. A timer according to claim 4, characterized in that, The frequency adjustment mechanism includes an adjustment disk, several protrusions, several guide blocks, an elastic element, and a second drive assembly. The adjustment disk is located directly above the drive disk and is rotatably mounted on the housing. The protrusions are circumferentially spaced along the side of the adjustment disk near the drive disk, and the guide blocks are circumferentially spaced along the side of the drive disk near the adjustment disk. Each protrusion is located between two adjacent guide blocks. Each guide block has an inclined guide surface on both sides in the arrangement direction. The top of each guide block corresponds to the junction where it enters the clearance groove from the outer surface of the drive disk, and the bottom of each guide block corresponds to the outer surface of the drive disk and the clearance groove, respectively. The elastic element is sleeved on the shaft of the drive gear, and its two ends abut against the drive gear and the housing, respectively. The second drive assembly is used to drive the adjustment disk to rotate.

6. A timer according to claim 5, characterized in that, The second drive assembly includes an adjusting shaft, a drive gear, a transition gear, a driven gear, and a limiting member. The adjusting shaft is rotatably mounted on the housing, with one end extending out of the housing. The drive gear is sleeved on the adjusting shaft, and the driven gear is coaxially fixed to the adjusting disc. The transition gear meshes with both the drive gear and the driven gear. The limiting component is used to restrict the rotational position of the adjusting shaft.

7. A timer according to claim 6, characterized in that, The limiting component includes an elastic sheet and a protrusion. Both ends of the elastic sheet are fixedly installed on the housing, and the protrusion is fixedly installed on the shaft wall of the adjusting shaft. The protrusion abuts against the elastic sheet, and the elastic sheet is in a bent state.

8. A timer according to claim 6, characterized in that, A limiting groove is provided on the outer side of the driven gear along the circumferential direction. A limiting block is fixedly installed on the inner wall of the housing corresponding to the position of the limiting groove. The limiting block is slidably installed in the limiting groove. The distance that the limiting block slides in the limiting groove is the maximum adjustment distance of the protrusion between two adjacent guide blocks.

9. A timer according to claim 1, characterized in that, Conductive contacts are installed at the positions where the timer stationary contact and the timer moving contact press against each other, and at the positions where the timer moving contact and the program contact press against each other.

10. A washing machine, characterized in that, It includes a body and a timer as described in any one of claims 1-9, wherein the two program contacts are electrically connected to the forward and reverse windings of the body.

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