Mechanism for detecting opening and closing states of door and door lock for household appliance

By designing a mechanism for detecting the status of the door switch including a housing, door buckle, door hook, slider, spring and micro switch in household appliances, the problems of insufficient monitoring accuracy and low safety in the prior art are solved, and high-precision door lock status monitoring and safety improvement are achieved.

CN222772039UActive Publication Date: 2025-04-18HANLE ELECTRONIC MASCH (NANJING) CO LTD
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Patent Information

Application Number
CN202421401798.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-19
Publication Date
2025-04-18
Estimated Expiration
2034-06-19

AI Technical Summary

Technical Problem

The prior art is difficult to monitor the status of household appliance door locks with high accuracy in a limited installation space, and the safety is insufficient in the face of abnormal situations such as the damage to the door buckle.

Method used

A mechanism for detecting the status of the door switch is designed, using a combination of a housing, door buckle, door hook, slider, spring and micro switch. Through the changes in the contact point between the slider and micro switch, the status of the door lock is accurately judged, and additional safety detection is provided when the door lock is abnormal.

Benefits of technology

It realizes high-precision monitoring of door lock status in a limited space, improves the safety of household appliances, and can effectively avoid safety risks in the face of abnormal situations.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a mechanism for detecting the opening and closing state of a door and a door lock for household appliances, and the mechanism for detecting the opening and closing state of the door comprises a shell, a door holder, a door hook, a sliding block, a spring and a microswitch. When the door holder is separated from the door hook, the door holder is in a first state, and the microswitch is in contact with the first section of the sliding rod; and when the door holder is buckled with the door hook, the door holder is in a second state, and the microswitch is in contact with the second section of the sliding rod. According to the mechanism for detecting the opening and closing state of the door and the door lock for the household appliance, the occupied space is small, mirror image arrangement can be achieved when the mechanism is installed in pairs, the ends provided with circuits are all arranged on the lower portion, water is prevented from entering the circuits, and safety is higher; the monitoring accuracy is higher, abnormal situations such as door holder damage are considered, and the safety of the household electrical appliance is improved. The mechanism for detecting the opening and closing states of the door and the door lock for the household appliances can be widely applied to the household appliances such as dishwashers and washing machines.
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Description

Technical Field

[0001] The utility model belongs to the technical field of household appliances, in particular to a mechanism for detecting the switch state of a door and a door lock used for household appliances. Background Art

[0002] For the safety of users during use, household appliances with doors (such as washing machines and dishwashers) are generally equipped with door locks, and stop working when the door locks are opened. Door locks generally include at least a door catch and a door hook, and the door lock is locked by the cooperation of the door catch and the door hook. Monitoring the state of the door lock is essentially monitoring the cooperation state of the door catch and the door hook, that is, whether the door hook is separated from the door catch. There are many ways to monitor the state of the door lock, such as reed switches, micro switches, optical position sensors, etc. However, as users have higher and higher requirements for the functions of household appliances, more and more components are installed, and the installation space is becoming more and more precious. Users have higher and higher requirements for the accuracy of monitoring the state of the door lock. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a mechanism for detecting the switch state of a door and a door lock for household appliances. The mechanism for detecting the switch state of the door occupies a small space and has high precision.

[0004] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0005] A mechanism for detecting the switch state of a door, comprising a housing, a door catch, a door hook, a slider, a spring and a micro switch, wherein a lock is arranged on the housing, and the door catch is hinged at the lock of the housing; the slider is slidably mounted on the housing, and comprises a contact rod and a slide rod, wherein the contact rod contacts the door catch, and a first slide rod section and a second slide rod section are arranged on the slide rod; the spring acts on the slide rod;

[0006] When the door catch is disengaged from the door hook, the door catch is in a first state, and the micro switch is in contact with the first section of the slide bar;

[0007] When the door buckle is buckled with the door hook, the door buckle is in the second state, and the micro switch is in contact with the second section of the sliding rod.

[0008] Furthermore, the sliding rod also includes a third section of the sliding rod, and when the door buckle is in the third state, the micro switch is in contact with the third section of the sliding rod.

[0009] Furthermore, the first section of the sliding rod, the second section of the sliding rod and the third section of the sliding rod are arranged adjacent to each other in sequence.

[0010] Furthermore, the third section of the sliding rod is concave.

[0011] Another improvement is that the third section of the sliding rod is a protrusion.

[0012] Furthermore, the door catch is a cam structure.

[0013] Furthermore, the sliding block includes a stopper, which is used to prevent the door hook from passing through the lock hole when the door buckle is in the third state.

[0014] Furthermore, the sliding block includes a spring slot, and the spring slot is used to place a spring.

[0015] Furthermore, a fixing protrusion is provided at one end of the spring groove, one end of the spring is fixed to the fixing protrusion, and the other end of the spring is fixed to the housing.

[0016] A door lock for household appliances comprises the above-mentioned mechanism for detecting the door switch state.

[0017] The utility model discloses a mechanism for detecting the switch state of a door and a door lock for household appliances, which occupies a small space and can be mirrored when installed in pairs, with the ends provided with circuits placed at the bottom to prevent water from entering the circuits, which is safer; the monitoring accuracy is higher, and abnormal situations such as door buckle damage are taken into consideration, thereby improving the safety of household appliances. The utility model discloses a mechanism for detecting the switch state of a door and a door lock for household appliances, which can be widely used in household appliances such as dishwashers and washing machines. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a mechanism for detecting the door switch state (excluding the door catch and door hook) of the utility model when the door lock is in the open state;

[0019] Figure 2 It is a schematic diagram of a mechanism for detecting the door switch state (excluding the door catch and door hook) of the utility model when the door lock is in the locked state;

[0020] Figure 3 A schematic diagram of a mechanism for detecting the door switch state (excluding the door catch and door hook) of the utility model when the door lock is in an abnormal state;

[0021] Figure 4 It is a schematic diagram of the door buckle and door hook of the utility model when the door lock is in the open state;

[0022] Figure 5 It is a schematic diagram of the door catch and door hook of the utility model when the door lock is in a locked state;

[0023] Figure 6 It is a schematic diagram of the door catch and door hook of the utility model when the door lock is in an abnormal state;

[0024] Figure 7 It is a top view of the slider of the utility model.

[0025] In the figure: 1, housing, 11, lock, 2, door catch, 3, door hook, 4, slider, 41, contact rod, 42, slide bar, 421, first section of slide bar, 422, second section of slide bar, 423, third section of slide bar, 43, spring groove, 431, fixing protrusion, 44, stopper, 5, micro switch, 6, torsion spring. DETAILED DESCRIPTION

[0026] In conjunction with the accompanying drawings, a mechanism for detecting the door switch state and a door lock for household appliances proposed in the present invention are described in detail below. In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part", "bottom" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second" and the like do not indicate the importance of the components, and therefore cannot be understood as a limitation on the present invention. The specific dimensions and values ​​used in this embodiment are only for illustrating the technical solution, and do not limit the scope of protection of the present invention. The following embodiments all take the automatic door lock of the present invention for use in a dishwasher as an example, but it should be noted that the automatic door lock of the present invention is not limited to dishwashers.

[0027] like Figure 1 and 4 As shown, a mechanism for detecting the door switch state of the utility model includes a housing 1, a door catch 2, a door hook 3, a slider 4, a spring and a micro switch 5. A lock 11 is provided on the housing 1, and the door catch 1 is hinged at the lock 11 of the housing 2. The tail end of the door catch 2 and the housing 1 (or the upper cover) are connected by a torsion spring 6. The slider 4 is slidably mounted on the housing 1, and the slider 4 includes a contact rod 41 and a slide rod 42. The contact rod 41 contacts the door catch 1, and the slide rod 42 is provided with a first slide rod section 421 and a second slide rod section 422. The spring acts on the slider 4, causing the slider 4 to move downward.

[0028] like Figure 1 and 4 As shown, when the door catch is separated from the door hook, the door catch is in the first state, and the micro switch is in contact with the first section of the slide bar. The household appliance determines that the door lock is in the open state at this time.

[0029] like Figure 2 and 5 As shown, when the door buckle is engaged with the door hook, the door buckle is in the second state, and the micro switch is in contact with the second section of the slide bar. The household appliance determines that the door lock is in the locked state at this time.

[0030] In order to prevent the door from being locked when the door lock of the household appliance is abnormal, such as the door buckle is damaged, Figure 3 and6 As shown, the slide bar also includes a third section of the slide bar. When the door buckle is in the third state, the micro switch is in contact with the third section of the slide bar.

[0031] Preferably, the first section of the slide bar, the second section of the slide bar and the third section of the slide bar are arranged adjacent to each other in sequence. The third section of the slide bar can be a depression or a protrusion.

[0032] The door buckle 1 is a cam structure.

[0033] like Figure 7 As shown, the slider 4 includes a stopper 44, which is used to prevent the door hook 3 from passing through the lock opening 11 when the door buckle 1 is in the third state (i.e., when the door lock is abnormal). Figure 7 As shown, the slider 4 includes a spring slot 43 for placing a spring. A fixing protrusion 431 is provided at one end of the spring slot 43, one end of the spring is fixed to the fixing protrusion 431, and the other end of the spring is fixed to the housing 1.

[0034] A door lock for household appliances comprises the above-mentioned mechanism for detecting the door switch state.

[0035] Based on the description of the preferred embodiments of the utility model, it should be clear that the utility model defined by the attached claims is not limited to the specific details described in the above description, and many obvious changes to the utility model that do not depart from the spirit or scope of the utility model may also achieve the purpose of the utility model.

Claims

1. A mechanism for detecting the door opening and closing state, characterized in that: It includes a housing, a door catch, a door hook, a slider, a spring and a micro switch. The housing is provided with a lock port, and the door catch is hinged at the lock port of the housing. The tail end of the door catch is connected to the housing through a torsion spring. The slider is slidably mounted on the housing. The slider includes a contact rod and a slide rod. The contact rod contacts the door catch. The slide rod is provided with a first slide rod section and a second slide rod section. The spring acts on the slide rod. When the door catch is disengaged from the door hook, the door catch is in a first state, and the micro switch is in contact with the first section of the slide bar; When the door buckle is buckled with the door hook, the door buckle is in the second state, and the micro switch is in contact with the second section of the sliding rod.

2. The mechanism for detecting the door opening and closing state according to claim 1, characterized in that: The slide bar further comprises a third section of the slide bar, and when the door catch is in a third state, the micro switch is in contact with the third section of the slide bar.

3. The mechanism for detecting the door opening and closing state according to claim 2, characterized in that: The first section of the sliding rod, the second section of the sliding rod and the third section of the sliding rod are arranged adjacent to each other in sequence.

4. The mechanism for detecting the door opening and closing state according to claim 2, characterized in that: The third section of the sliding rod is concave.

5. The mechanism for detecting the door opening and closing state according to claim 2, characterized in that: The third section of the slide bar is a protrusion.

6. The mechanism for detecting the door opening and closing state according to claim 1, characterized in that: The door buckle is a cam structure.

7. The mechanism for detecting the door opening and closing state according to claim 1, characterized in that: The sliding block comprises a stopper, and the stopper is used to prevent the door hook from passing through the lock opening when the door buckle is in the third state.

8. The mechanism for detecting the door opening and closing state according to claim 1, characterized in that: The sliding block comprises a spring slot, and the spring slot is used for placing a spring.

9. The mechanism for detecting the door opening and closing state according to claim 8, characterized in that: A fixing protrusion is arranged at one end of the spring slot, one end of the spring is fixed to the fixing protrusion, and the other end of the spring is fixed on the housing.

10. A door lock for a household appliance, comprising the mechanism for detecting the door switch state according to any one of claims 1 to 9.