Automatic door opening and closing mechanism of dish washing machine

Abstract

The automatic door opening and closing mechanism comprises a shell, a push-pull rod and a driving mechanism used for driving the push-pull rod to slide front and back are arranged in the shell, a bayonet and a protruding part are arranged on the two sides of the push-pull rod respectively, the bayonet is close to the middle of the push-pull rod, and the protruding part is close to the middle of the push-pull rod. The push-pull rod is provided with a protruding part, the protruding part is located at the rear end of the push-pull rod, a first trigger switch and a second trigger switch are arranged in the shell, the first trigger switch and the second trigger switch are arranged on the two sides of the push-pull rod respectively, and when the push-pull rod retracts in place towards the interior of the shell, the first trigger switch and the second trigger switch are switched on. When the push-pull rod extends out of the shell in place, a contact of the first trigger switch slides into the bayonet to enable the first trigger switch to generate a first electric signal, and when the push-pull rod extends out of the shell in place, the protruding part touches a contact of the second trigger switch to enable the second trigger switch to generate a second electric signal. Closed-loop control of door opening and closing can be achieved, and accuracy and reliability of door opening and closing actions can be improved.

Description

Technical Field

[0001] The utility model relates to a dishwasher, in particular to an automatic door opening and closing mechanism of the dishwasher. Background Art

[0002] In order to realize automatic door opening and closing control, a dishwasher is provided with a driving device with a motor as a power source. For the relevant structure, please refer to the publication number CN108661445B, entitled "A dishwasher automatic door lock device and a dishwasher", which records:

[0003] “An automatic door lock device for a dishwasher comprises a first door lock, comprising a lock hole provided at one end of a door body, and a lock core provided on the body and detachably connected to the lock hole, the door body being locked and unlocked by the cooperation between the lock hole and the lock core; a second door lock provided on the body, used to clamp the lock core, drive the lock core to move relative to the body and disengage from the lock core, so as to limit the opening angle of the door body relative to the body; a controller electrically connected to the second door lock, controlling the second door lock to unlock the lock core”;

[0004] In this type of structure, automatic door opening and closing control is achieved based on the coordinated structure of motors, gears, and spur racks. Although it can realize automatic door opening and closing drive, it is an open-loop control. The control system cannot grasp the opening and closing status of the dishwasher door and the switch position. Therefore, it is easy to cause problems such as incorrect door opening and closing action or even accidental injury to users, which in turn affects the overall performance of the dishwasher. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an automatic door opening and closing mechanism for a dishwasher which can realize closed-loop control of door opening and closing and improve the accuracy and reliability of door opening and closing actions in view of the deficiencies of the prior art.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions.

[0007] A dishwasher automatic door opening and closing mechanism comprises a shell, a push-pull rod and a driving mechanism for driving the push-pull rod to slide forward and backward are arranged in the shell, a bayonet and a protrusion are respectively arranged on both sides of the push-pull rod, the bayonet is close to the middle of the push-pull rod, and the protrusion is located at the rear end of the push-pull rod, a first trigger switch and a second trigger switch are arranged in the shell, and the first trigger switch and the second trigger switch are respectively arranged on both sides of the push-pull rod, when the push-pull rod is retracted into the shell into place, the contact of the first trigger switch slides into the bayonet to make the first trigger switch generate a first electrical signal, and when the push-pull rod is extended to the outside of the shell into place, the protrusion touches the contact of the second trigger switch to make the second trigger switch generate a second electrical signal.

[0008] Preferably, both the first trigger switch and the second trigger switch are micro switches.

[0009] Preferably, two slide rails are formed in the housing, the slide rails are parallel to the push-pull rod, and the slide rails are slidably matched with the bottom surface of the push-pull rod.

[0010] Preferably, the driving mechanism includes a motor, a first gear set and a second gear set, a driving gear is provided on the driving shaft of the motor, a spur rack is formed on one side edge of the push-pull rod, and the driving gear, the first gear set, the second gear set and the spur rack are meshed in sequence.

[0011] Preferably, the protrusion and the spur rack are located on the same side of the push-pull rod.

[0012] Preferably, the bayonet is located on a side of the push-pull rod away from the spur rack.

[0013] Preferably, the second gear set includes a gear body and an inner gear, a notch is formed on one side of the gear body, the inner gear is arranged in the notch, the inner gear and the gear body are coaxially connected via a pin shaft, a plurality of groups of elastic rib components are evenly arranged around the inner gear, the elastic rib components include two symmetrically arranged arcuate elastic ribs, a plurality of protrusions are formed on the edge of the notch, the protrusions correspond to the arcuate elastic ribs one by one, and the protrusions abut against the inner side of the end of the arcuate elastic rib, the gear body is meshed with the first gear set, and the inner gear is meshed with the spur rack.

[0014] In the automatic door opening and closing mechanism of a dishwasher disclosed in the utility model, the shell is fixed in the main unit of the dishwasher, the front end of the push-pull rod is used to connect the dishwasher door, and the driving mechanism is used to drive the push-pull rod to move forward and backward, so as to realize the opening and closing drive of the dishwasher door. On this basis, the two sides of the push-pull rod are respectively provided with a bayonet and a protrusion. Correspondingly, a first trigger switch and a second trigger switch are respectively provided on both sides of the push-pull rod and located in the shell. Since each trigger switch can generate two signals of 0 and 1, the control system of the dishwasher can judge the push-pull position of the push-pull rod according to the electrical signals fed back by the first trigger switch and the second trigger switch, and then derive the opening and closing state and the in-place status of the dishwasher door, so as to realize the closed-loop control of the door opening and closing, and effectively improve the accuracy and reliability of the door opening and closing action. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional diagram of the automatic door opening and closing mechanism of the dishwasher of the utility model;

[0016] Figure 2 This is the internal structure diagram of the automatic door opening and closing mechanism of the dishwasher of the utility model;

[0017] Figure 3 It is the structural diagram of the push-pull rod;

[0018] Figure 4 Figure 1 is the internal structure diagram of the shell;

[0019] Figure 5 is a structural diagram of the second gear set and the spur rack;

[0020] Figure 6 This is a structural diagram of the dishwasher with the door open. DETAILED DESCRIPTION

[0021] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments.

[0022] The utility model discloses an automatic door opening and closing mechanism for a dishwasher. Figures 1 to 6 As shown, it includes a shell 1, in which a push-pull rod 2 and a driving mechanism 3 for driving the push-pull rod 2 to slide forward and backward are arranged. A bayonet 20 and a protrusion 21 are respectively arranged on both sides of the push-pull rod 2. The bayonet 20 is close to the middle of the push-pull rod 2, and the protrusion 21 is located at the rear end of the push-pull rod 2. A first trigger switch 4 and a second trigger switch 5 are arranged in the shell 1. The first trigger switch 4 and the second trigger switch 5 are respectively arranged on both sides of the push-pull rod 2. When the push-pull rod 2 retracts into place into the shell 1, the contact of the first trigger switch 4 slides into the bayonet 20 to make the first trigger switch 4 generate a first electrical signal. When the push-pull rod 2 extends to the outside of the shell 1, the protrusion 21 touches the contact of the second trigger switch 5 to make the second trigger switch 5 generate a second electrical signal.

[0023] In the above structure, the shell 1 is fixed in the main unit 100 of the dishwasher, the front end of the push-pull rod 2 is used to connect the dishwasher door 101, and the driving mechanism 3 is used to drive the push-pull rod 2 to move forward and backward, so as to realize the opening and closing drive of the dishwasher door. On this basis, the two sides of the push-pull rod 2 are respectively provided with a bayonet 20 and a protrusion 21. Correspondingly, a first trigger switch 4 and a second trigger switch 5 are respectively provided on both sides of the push-pull rod 2 and located in the shell 1. Since each trigger switch can generate two signals 0 and 1, the control system of the dishwasher can judge the push-pull position of the push-pull rod 2 according to the electrical signals fed back by the first trigger switch 4 and the second trigger switch 5, and then derive the opening and closing state and the in-place status of the dishwasher door 101, thereby realizing the closed-loop control of the door opening and closing, and effectively improving the accuracy and reliability of the door opening and closing action.

[0024] As a preferred device, in this embodiment, the first trigger switch 4 and the second trigger switch 5 are both micro switches. The contacts of the first trigger switch 4 and the second trigger switch 5 are both smooth contacts.

[0025] To ensure that the push-pull rod 2 moves straight, in this embodiment, two slide rails 10 are formed in the housing 1. The slide rails 10 are parallel to the push-pull rod 2 and are slidably matched with the bottom surface of the push-pull rod 2.

[0026] Regarding the preferred structure of the driving mechanism 3, Figure 4 and Figure 5 As shown, the driving mechanism 3 includes a motor 30, a first gear set 31 and a second gear set 32. A driving gear 33 is provided on the driving shaft of the motor 30. A spur rack 22 is formed on one side edge of the push-pull rod 2. The driving gear 33, the first gear set 31, the second gear set 32 ​​and the spur rack 22 are meshed in sequence.

[0027] Further, the protrusion 21 and the spur rack 22 are located on the same side of the push-pull rod 2. In this structure, since the protrusion 21 is located at the end of the push-pull rod 2, it will not interfere with the second gear set 32.

[0028] Correspondingly, the bayonet 20 is located on a side of the push-pull rod 2 away from the spur rack 22 .

[0029] As a preferred structure, the second gear set 32 ​​includes a gear body 320 and an inner gear 321. A notch 322 is formed on one side of the gear body 320. The inner gear 321 is disposed in the notch 322. The inner gear 321 is coaxially connected to the gear body 320 via a pin shaft 323. A plurality of groups of elastic rib components 324 are evenly arranged around the inner gear 321. The elastic rib components 324 include two symmetrically arranged arc-shaped elastic ribs 325. A plurality of protrusions 326 are formed on the edge of the notch 322. The protrusions 326 correspond to the arc-shaped elastic ribs 325 one by one, and the protrusions 326 abut against the inner side of the end of the arc-shaped elastic ribs 325. The gear body 320 and the first gear set 31 are meshed with each other, and the inner gear 321 and the spur rack 22 are meshed with each other.

[0030] See also Figure 6In the above structure, a plurality of elastic rib assemblies 324 are arranged around the inner gear 321, and the elastic rib assembly 324 specifically includes two arc-shaped elastic ribs 325, which are relatively bent into a "" shape and respectively abut and engage with the protrusions 326 on the inner side of the gear body 320. When the spur rack 22 is subjected to a certain stress, the arc-shaped elastic ribs 325 will undergo a certain deformation, so that the inner gear 321 rotates within a certain angle range, and the spur rack 22 produces a "slip" action. Based on the elastic buffering effect of the above structure, even if the user forcibly closes the door, it will not cause overshoot stress to the drive mechanism 3, and damage to the internal transmission structure can be avoided. In addition, assuming that the door body pinches the hand during the door closing process, the arc-shaped elastic ribs 325 will play their own elastic buffering role, so that the gear body 320 will produce idling within a certain range, thereby reducing the clamping force on the hand, thereby improving the safety and reliability of the dishwasher.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the technical scope of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dishwasher automatic door opening and closing mechanism, characterized in that: The invention comprises a housing (1), wherein a push-pull rod (2) and a driving mechanism (3) for driving the push-pull rod (2) to slide forward and backward are arranged in the housing (1), a bayonet (20) and a protrusion (21) are arranged on both sides of the push-pull rod (2), wherein the bayonet (20) is close to the middle of the push-pull rod (2), and the protrusion (21) is located at the rear end of the push-pull rod (2), and a first trigger switch (4) and a second trigger switch (5) are arranged in the housing (1), wherein the first trigger switch ( The first trigger switch (4) and the second trigger switch (5) are respectively arranged on both sides of the push-pull rod (2); when the push-pull rod (2) is retracted into the housing (1) to a certain position, the contact of the first trigger switch (4) slides into the bayonet (20) to make the first trigger switch (4) generate a first electrical signal; when the push-pull rod (2) is extended out of the housing (1) to a certain position, the protrusion (21) touches the contact of the second trigger switch (5) to make the second trigger switch (5) generate a second electrical signal.

2. The automatic door opening and closing mechanism of a dishwasher according to claim 1, characterized in that: The first trigger switch (4) and the second trigger switch (5) are both micro switches.

3. The automatic door opening and closing mechanism of a dishwasher according to claim 1, characterized in that: Two slide rails (10) are formed in the housing (1); the slide rails (10) and the push-pull rod (2) are parallel to each other, and the slide rails (10) are slidably matched with the bottom surface of the push-pull rod (2).

4. The automatic door opening and closing mechanism of a dishwasher according to claim 1, characterized in that: The driving mechanism (3) comprises a motor (30), a first gear set (31) and a second gear set (32); a driving gear (33) is provided on the driving shaft of the motor (30); a spur rack (22) is formed on one side edge of the push-pull rod (2); the driving gear (33), the first gear set (31), the second gear set (32) and the spur rack (22) are meshed in sequence.

5. The automatic door opening and closing mechanism of a dishwasher according to claim 4, characterized in that: The protruding portion (21) and the spur rack (22) are located on the same side of the push-pull rod (2).

6. The automatic door opening and closing mechanism of a dishwasher according to claim 4, characterized in that: The bayonet (20) is located on a side of the push-pull rod (2) away from the spur rack (22).

7. The automatic door opening and closing mechanism of a dishwasher according to claim 4, characterized in that: The second gear set (32) comprises a gear body (320) and an inner gear (321); a notch (322) is provided on one side of the gear body (320); the inner gear (321) is arranged in the notch (322); the inner gear (321) and the gear body (320) are coaxially connected via a pin shaft (323); a plurality of elastic rib components (324) are evenly arranged around the inner gear (321); the elastic rib components (324) includes two symmetrically arranged arc-shaped elastic ribs (325), and the edge of the notch (322) is formed with a plurality of protrusions (326), the protrusions (326) correspond to the arc-shaped elastic ribs (325) one by one, and the protrusions (326) abut against the inner side of the end of the arc-shaped elastic rib (325), the gear body (320) and the first gear set (31) are meshed with each other, and the inner gear (321) and the spur rack (22) are meshed with each other.

Images