Household appliance door closing safety detection device and household appliance

Abstract

The utility model relates to the technical field of household appliance door body closing safety detection, and provides a household appliance door body closing safety detection device and a household appliance. The connecting rod does axial telescopic motion in the opening and closing process of a door body, and the inductive switch is matched with the connecting rod when the door body is in a closed state; the matching position between the connecting rod and the inductive switch is arranged on the side portion of the connecting rod in the moving direction, and when the door body is closed, the connecting rod triggers the inductive switch through the side portion of the connecting rod. The inductive switch does not occupy the moving direction position of the connecting rod, the end of the connecting rod is used for being connected with the elastic piece, a connecting column connected with the elastic piece does not need to be additionally arranged on the side portion of the connecting rod, the overall structure of the connecting rod is simplified, the connecting rod triggers the inductive switch when the door body is closed, and the household appliance can work only when the inductive switch detects that the door body is in the closed state. After the door body is opened, the connecting rod pops up, the inductive switch resets, the household appliance cannot work, and safety protection is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of door closure safety detection for household appliances, specifically to a door closure safety detection device for household appliances and a household appliance. Background Technology

[0002] With the increasing demands for intelligence and safety in home appliances, door closure detection technology has become a core safety module for appliances such as washing machines, microwave ovens, ovens, disinfection cabinets, and dishwashers. Traditional detection solutions mostly employ contact / non-contact sensing technologies such as mechanical limit switches, magnetic reed switches, or Hall effect sensors.

[0003] See Figure 1 Existing door closing safety detection devices include a linkage and a proximity switch. The proximity switch is typically a microswitch, and its contacts are usually positioned opposite the end of the linkage, meaning the proximity switch and linkage move in opposite directions. An additional connecting post for a resilient element is required on the side of the linkage body. When the door closes, the force acts on the linkage, triggering the proximity switch. When the door opens, the resilient element springs the linkage away, causing it to move away from the proximity switch.

[0004] The installation displacement of the induction switch occupies the position of the linkage's movement direction, resulting in a large length and volume of the door closing safety detection device, and the linkage's design shape is not simple enough. Utility Model Content

[0005] This utility model proposes a safety detection device for the closing of a household appliance door. The connection between the linkage and the induction switch is set on the side of the linkage in the direction of movement. When the door is closed, the linkage triggers the induction switch through its side. The induction switch does not occupy the position of the linkage in the direction of movement, and the linkage's stroke is relatively increased. The end of the linkage is used to connect to the elastic element, eliminating the need for an additional connecting post on the side of the linkage to connect to the elastic element, thus simplifying the overall structure of the linkage. When the linkage triggers the induction switch when the door is closed, the induction switch detects that the door is closed, and the household appliance can work. When the door is opened, the linkage pops out, the induction switch resets, and the household appliance cannot work, thus achieving safety protection.

[0006] A safety detection device for closing a household appliance door, designed for this purpose, includes a connecting rod that performs axial telescopic movement during the opening and closing of the door, and an inductive switch that cooperates with the connecting rod when the door is closed; the cooperation position between the connecting rod and the inductive switch is set on the side of the connecting rod in the direction of movement, and when the door is closed, the connecting rod triggers the inductive switch through its own side.

[0007] The direction of the linkage movement is set in a longitudinal and transverse direction with the direction of the trigger signal of the inductive switch, forming an angle A.

[0008] The inductive switch is equipped with a contact foot that cooperates with the connecting rod. The contact foot and the side of the connecting rod are arranged opposite each other. The movement direction of the contact foot of the inductive switch is not parallel to the movement direction of the connecting rod and is arranged in a longitudinal and transverse manner. When the door is closed, the connecting rod triggers the contact foot of the inductive switch through its own side.

[0009] The connecting rod is provided with a guide surface that cooperates with the induction switch. The guide surface guides the side of the connecting rod to trigger the induction switch during the closing process of the door.

[0010] The safety detection device for closing the door of a household appliance also includes a fixed base, a connecting rod mounted on the fixed base, and a guide limit block provided on the fixed base. One side of the connecting rod is limited to the outside of the guide limit block, and the connecting rod moves axially along the guide limit block on the fixed base.

[0011] The connecting rod is equipped with an anti-detachment block that mates with the inner side of the fixed seat. When the connecting rod moves to the corresponding position during the opening of the door, the anti-detachment block abuts against the inner side of the fixed seat to prevent the connecting rod from detaching from the fixed seat.

[0012] The anti-detachment block and the connecting rod are integrally formed and constitute an inseparable whole; or, the anti-detachment block and the connecting rod are separate, with the anti-detachment block installed on the connecting rod.

[0013] An elastic element is provided between the connecting rod and the fixed seat. One end of the elastic element abuts against the inner end face of the fixed seat, and the other end of the elastic element abuts against the end of the connecting rod. The connecting rod is mounted on the fixed seat by elastic extension and contraction of the elastic element. The elastic element and the connecting rod are installed and arranged on the fixed seat along the length direction of the fixed seat, and the elastic element and the main body of the connecting rod are coaxially arranged.

[0014] The fixed base is equipped with a face cover, and the inductive switch, connecting rod and elastic element are installed between the fixed base and the face cover.

[0015] A household appliance includes a body and a door that opens and closes on the body, wherein the door is provided with a door closing safety detection device at the opening and closing position between the door and the body.

[0016] The household appliances mentioned are dishwashers, washing machines, disinfection cabinets, refrigerators, microwave ovens, ovens, or electric steamers.

[0017] The beneficial technical effects of this utility model are as follows:

[0018] The connection between the linkage and the sensor switch is positioned on the side of the linkage's movement direction. When the door is closed, the linkage triggers the sensor switch via its side. The sensor switch does not occupy the linkage's movement direction, thus increasing the linkage's travel. The end of the linkage is used to connect to the elastic element, eliminating the need for an additional connecting post on the side of the linkage to connect the elastic element. This simplifies the overall structure of the linkage. Furthermore, when the linkage triggers the sensor switch while the door is closed, the sensor switch detects that the door is closed, allowing the household appliances to operate. When the door is opened, the linkage pops out, the sensor switch resets, and the household appliances cannot operate, thus achieving safety protection.

[0019] In the top-view projection direction, the length direction of the inductive switch is the same as the length direction of the fixed base. This can be understood as the inductive switch not being set laterally on the fixed base, effectively reducing the volume of the fixed base in the width direction. Moreover, the inductive switch is set on the side of the connecting rod, which does not obstruct the forward and backward movement of the connecting rod, effectively reducing the setting size of the fixed base in the length direction. The overall size design of the safety detection device is relatively small, and the internal structure of the safety detection device is compact. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the linkage and micro switch mechanism in a conventional dishwasher.

[0021] Figure 2 This is an assembly and disassembly diagram of a household appliance door closing safety detection device according to an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the internal structure of a household appliance door closing safety detection device according to an embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the structure of a dishwasher connecting rod and a micro switch according to an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the linkage structure of a dishwasher according to an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the structure of a household appliance door closing safety detection device installed on the inner liner according to an embodiment of the present invention.

[0026] Figure 7 for Figure 6 Enlarged view of point A in the middle. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. In order to make the above-mentioned objects, features and advantages of the present application more apparent and understandable, many specific details are set forth in the following description in order to provide a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0028] See Figures 2-7 A safety detection device for closing a household appliance door includes a connecting rod 2 that performs axial telescopic movement during the opening and closing of the door 1, and an induction switch 3 that cooperates with the connecting rod 2 when the door 1 is closed; the cooperation position between the connecting rod 2 and the induction switch 3 is set on the side of the connecting rod 2 in the direction of movement, and when the door 1 is closed, the connecting rod 2 triggers the induction switch 3 through its own side.

[0029] The connection between the connecting rod 2 and the sensor switch 3 is set on the side of the connecting rod 2 in the direction of movement. When the door 1 is closed, the connecting rod 2 triggers the sensor switch 3 through its side. The sensor switch 3 does not occupy the position of the connecting rod 2 in the direction of movement, and the movement stroke of the connecting rod 2 is relatively increased. The end of the connecting rod 2 is used to connect the elastic element 10. There is no need to set an additional connecting post for connecting the elastic element 10 on the side of the connecting rod 2, which simplifies the overall structure of the connecting rod 2. When the connecting rod 2 triggers the sensor switch 3 when the door 1 is closed, the sensor switch 3 detects that the door 1 is closed, and the household appliances can work. When the door 1 is opened, the connecting rod 2 pops out, the sensor switch 3 resets, and the household appliances cannot work, thus achieving safety protection.

[0030] The movement direction of the connecting rod 2 is arranged longitudinally and laterally with the trigger signal direction of the inductive switch 3, forming an angle A. This can be understood as follows: when the dishwasher door closes, as the connecting rod 2 moves axially in the longitudinal direction, it triggers the contact pin 4 of the inductive switch 3. The contact pin 4 then moves laterally, so its movement direction is not parallel to the movement direction of the connecting rod 2. Preferably, the movement direction of the contact pin 4 coincides with the movement direction of the connecting rod 2. The advantage of this design is that the stroke of the connecting rod 2 can be made larger, and the assembly tolerance between the connecting rod 2 and the inductive switch 3 can be improved.

[0031] In this embodiment, the included angle A is preferably 90°.

[0032] The induction switch 3 is provided with a contact foot 4 that cooperates with the connecting rod 2. The contact foot 4 and the side of the connecting rod 2 are arranged opposite each other. The movement direction of the contact foot 4 of the induction switch 3 is not parallel to the movement direction of the connecting rod 2 and is arranged in a longitudinal and transverse manner. When the door 1 is closed, the connecting rod 2 triggers the contact foot 4 of the induction switch 3 through its own side.

[0033] The connecting rod 2 is provided with a guide surface 5 that cooperates with the induction switch 3. The guide surface 5 guides the side of the connecting rod 2 to trigger the induction switch 3 during the closing process of the door 1.

[0034] In this embodiment, when the door 1 is opened, the connecting rod 2 extends elastically; when the door 1 is closed, the connecting rod 2 gradually retracts into the fixed seat 6 to prevent the end of the connecting rod 2 from rigidly colliding with the contact 4 of the induction switch 3. Therefore, the guide surface 5 is provided on one side of the end of the connecting rod 2 so that during the process of the connecting rod 2 retracting into the fixed seat 6, on the one hand, the guide surface 5 allows the end of the connecting rod 2 to avoid contacting the contact 4 of the induction switch 3; on the other hand, the guide surface 5 acts on the outside of the induction switch 3, forming a guide slope or guide arc surface to guide the movement of the connecting rod 2. When the connecting rod 2 retracts to the corresponding position as the door 1 closes, the side of the connecting rod 2 acts on the contact 4 of the induction switch 3, and the induction switch 3 detects that the door 1 is in the closed state.

[0035] The safety detection device for closing the door of a household appliance also includes a fixed base 6. The connecting rod 2 is installed on the fixed base 6. The fixed base 6 is provided with a guide limit block 7. One side of the connecting rod 2 is limited on the outside of the guide limit block 7. The connecting rod 2 moves axially along the guide limit block 7 on the fixed base 6 to prevent the connecting rod 2 from moving left and right inside the fixed base 6 during the movement.

[0036] The connecting rod 2 is provided with an anti-detachment block 8 that cooperates with the inner side of the fixed seat 6. When the connecting rod 2 moves to the corresponding position during the opening of the door 1, the anti-detachment block 8 abuts against the inner side of the fixed seat 6 to prevent the connecting rod 2 from detaching from the fixed seat 6.

[0037] The anti-detachment block 8 and the connecting rod 2 are integrally formed and form an inseparable whole; or, the anti-detachment block 8 and the connecting rod 2 are separately arranged, with the anti-detachment block 8 installed on the connecting rod 2.

[0038] In this embodiment, the fixed base 6 is provided with a through hole corresponding to the telescopic end of the connecting rod 2, and the outer diameter of the anti-detachment block 8 is larger than the inner diameter of the through hole to prevent the connecting rod 2 from detaching from the fixed base 6 during the extension process.

[0039] An elastic element 10 is provided between the connecting rod 2 and the fixed base 6. One end of the elastic element 10 abuts against the inner end face of the fixed base 6, and the other end of the elastic element 10 abuts against the end of the connecting rod 2. The connecting rod 2 is axially movable on the fixed base 6 through the elastic extension and retraction of the elastic element 10. The elastic element 10 and the connecting rod 2 are installed and arranged on the fixed base 6 along the length direction of the fixed base 6, and the elastic element 10 and the main body of the connecting rod 2 are coaxially arranged.

[0040] The mating position between the connecting rod 2 and the inductive switch 3 is set on the side of the moving direction of the connecting rod 2. The end of the connecting rod 2 is left with space for the installation of the elastic element 10. On the one hand, the movement stroke of the connecting rod 2 is increased, and on the other hand, the side of the connecting rod 2 does not need to be provided with an additional connecting post for connecting the elastic element 10. The connecting rod 2 is arranged in a straight line, which simplifies the overall structure of the connecting rod 2.

[0041] The fixed base 6 is provided with a face cover 12, and the induction switch 3, the connecting rod 2 and the elastic element 10 are installed between the fixed base 6 and the face cover 12.

[0042] The fixed base 6 is provided with a mounting cavity 9 for accommodating the mounting rod 2. The front and rear ends of the mounting cavity 9 are connected to each other so that the upper part of the mounting cavity 9 forms an open mounting cavity, and the mounting rod 2 is installed on the fixed base 6 from top to bottom.

[0043] In this embodiment, the upper part of the mounting cavity 9 forms an open mounting cavity, and the connecting rod 2 is installed on the fixed seat 6 from top to bottom. During the installation of the connecting rod 2, there are no components or structures on the upper part of the mounting cavity 9 that would obstruct the downward installation of the connecting rod 2 on the fixed seat 6, which facilitates the overall assembly between the connecting rod 2 and the fixed seat 6.

[0044] The fixed base 6 is provided with an assembly cavity 11 for accommodating and installing the inductive switch 3. The assembly cavity 11 is connected to the installation cavity 9, and there is a clearance between the assembly cavity 11 and the installation cavity 9. The engagement position between the connecting rod 2 and the inductive switch 3 is set to correspond to the clearance, so as to ensure the contact engagement between the connecting rod 2 and the inductive switch 3.

[0045] A household appliance includes a body 13 and a door 1 that opens and closes on the body 13. The door 1 is provided with a door closing safety detection device at the opening and closing position between the door and the body 13.

[0046] The household appliances mentioned are dishwashers, washing machines, disinfection cabinets, refrigerators, microwave ovens, ovens, or electric steamers.

[0047] In this embodiment, the household appliance is specifically a dishwasher.

[0048] In this embodiment, the cover 12 is provided with a downwardly extending connecting block, the connecting block having a fastening hole, and the fixing base 6 having a buckle. The buckle engages with the buckle to fix the cover 12 to the fixing base 6. The fixing base 6 has a lug that is fixed to the top of the dishwasher inner tub.

[0049] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A home appliance door body closing safety detection device, comprising an inductive switch (3) and a connecting rod (2) which performs axial extension and retraction during opening and closing of a door body (1); characterized in that: The matching position between the connecting rod (2) and the inductive switch (3) is arranged on the side of the movement direction of the connecting rod (2), and the connecting rod (2) triggers the inductive switch (3) through the side of the connecting rod (2) in the closed state of the door body (1).

2. The home appliance door closing safety detection device according to claim 1, characterized in that: The movement direction of the connecting rod (2) and the triggering signal direction of the inductive switch (3) are arranged in a longitudinal and transverse manner and form an included angle A.

3. The home appliance door closing safety detection device according to claim 1, characterized in that: The inductive switch (3) is provided with a contact pin (4) matched with the connecting rod (2), the contact pin (4) is arranged opposite to the side of the connecting rod (2), the movement direction of the contact pin (4) of the inductive switch (3) is not parallel to the movement direction of the connecting rod (2) and is arranged in a longitudinal and transverse manner, and the connecting rod (2) triggers the contact pin (4) of the inductive switch (3) through the side of the connecting rod (2) when the door body (1) is closed.

4. The home appliance door closing safety detection device according to claim 1, characterized in that: The connecting rod (2) is provided with a guide surface (5) matched with the inductive switch (3), and the guide surface (5) guides the side of the connecting rod (2) to trigger the inductive switch (3) during the closing process of the door body (1).

5. The home appliance door closing safety detection device according to claim 1, characterized in that: Further comprising a fixed seat (6), the connecting rod (2) is installed on the fixed seat (6), the fixed seat (6) is provided with a guide limiting block (7), one side of the connecting rod (2) is limited on the outside of the guide limiting block (7), and the connecting rod (2) moves axially on the fixed seat (6) along the guide limiting block (7).

6. The home appliance door closing safety detection device according to claim 5, characterized in that: The connecting rod (2) is provided with an anti-disengagement block (8) matched with the inside of the fixed seat (6), the connecting rod (2) moves to the corresponding position during the opening process of the door body (1), and the anti-disengagement block (8) abuts against the inside of the fixed seat (6) to prevent the connecting rod (2) from disengaging outwardly from the fixed seat (6).

7. The home appliance door closing safety detection device according to claim 6, characterized in that: The anti-disengagement block (8) is integrally formed with the connecting rod (2) and forms an undetachable whole; or the anti-disengagement block (8) is arranged in a split type with the connecting rod (2), and the anti-disengagement block (8) is installed on the connecting rod (2).

8. The home appliance door closing safety detection device according to claim 5, characterized in that: The connecting rod (2) and the fixed seat (6) are provided with an elastic member (10), one end of the elastic member (10) abuts against the inner end face of the fixed seat (6), the other end of the elastic member (10) abuts against the end of the connecting rod (2), the connecting rod (2) is arranged on the fixed seat (6) through the elastic expansion axial movement of the elastic member (10); the elastic member (10) and the connecting rod (2) are arranged on the fixed seat (6) along the length direction of the fixed seat (6), and the elastic member (10) and the main body of the connecting rod (2) are coaxially arranged.

9. The home appliance door closing safety detection device according to claim 8, characterized in that: The fixed seat (6) is provided with a surface cover (12), the inductive switch (3), the connecting rod (2) and the elastic member (10) are installed between the fixed seat (6) and the surface cover (12).

10. A household appliance comprising a machine body (13) and a door body (1) which is opened and closed on the machine body (13), and a household appliance door body closing safety detection device according to any one of claims 1-9 is arranged at the opening and closing position between the door body (1) and the machine body (13). The household appliance is a dishwasher, a washing machine, a sterilizer, a refrigerator, a microwave oven, an oven or an electric steamer.

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