Push rod microswitch trigger mechanism based on door pusher

Abstract

The utility model discloses a push rod microswitch trigger mechanism based on a door pusher. The push rod microswitch trigger mechanism comprises an L-shaped swing rod. A guide sliding block is arranged at the end part of a first swing arm of the L-shaped swing rod, and a contact assembly is arranged at the end part of a second swing arm; when a rack push rod moves along a straight line, a guide sliding block at the end part of a first swing arm slides in a guide groove formed in the rack push rod and drives an L-shaped swing rod to rotate around the central axis of a rotating ring along with the angle change of the guide groove, so that a contact assembly at the end part of a second swing arm swings left and right; the two sides of the contact assembly are each provided with a set of contact switches, and the contact switches on the two sides are in contact along with swinging of the contact assembly at the end of the second swing arm and correspond to stretching limiting and retracting limiting of the rack push rod respectively. The microswitch trigger mechanism is arranged in the door pusher, the extension limit and the retraction limit of the rack push rod can be detected, the work of the motor is controlled through a signal fed back by the contact switch, and therefore intelligent control is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of dishwasher door pushers, and particularly relates to a push rod microswitch trigger mechanism based on a door pusher. Background Technique

[0002] With the expansion of the dishwasher market, new functions of dishwashers emerge in an endless stream. Among them, the automatic door opening function, as an essential function for high performance and energy efficiency reduction, has been widely promoted on dishwashers. However, the common automatic door opening on the current market basically uses a motor to drive a push rod to push out the door body.

[0003] A common door pushing device for dishwashers on the current market, such as an automatic door opening structure for a dishwasher disclosed in Patent No. CN 214906534 U, only has a simple pushing function and lacks the limit function for pushing or retracting. During actual use, the movement of the door pushing device lacks controllability and is difficult to meet the performance requirements of high-end intelligent dishwashers. Content of the Utility Model

[0004] The purpose of the utility model is to provide a push rod microswitch trigger mechanism based on a door pusher to solve the defects of the existing dishwasher door pushing device.

[0005] To solve the above technical problems, the utility model provides a push rod microswitch trigger mechanism based on a door pusher, including an L-shaped swing rod. The corner of the L-shaped swing rod is a rotating ring, and it is rotationally connected to a pin shaft inside the machine shell through this rotating ring;

[0006] A guiding slider is arranged at the end of the first swing arm of the L-shaped swing rod, and a contact component is arranged at the end of the second swing arm; when the rack push rod moves linearly, the guiding slider at the end of the first swing arm slides in a guiding groove opened on the rack push rod, and drives the L-shaped swing rod to rotate around the central axis of the rotating ring as the angle of the guiding groove changes, so that the contact component at the end of the second swing arm swings left and right;

[0007] A group of contact switches are respectively arranged on both sides of the contact component. As the contact component at the end of the second swing arm swings to contact the contact switches on both sides, it respectively corresponds to the extension limit and retraction limit of the rack push rod.

[0008] Preferably, the contact component includes a contact holder, and a contact is movably connected to each side of the contact holder. The contact holder is fixedly connected to the end of the second swing arm of the L-shaped swing rod. As the second swing arm swings, the contact correspondingly contacts the contact switch on the same side.

[0009] Preferably, a pre-tightening spring is arranged between the two contacts, and the pre-tightening spring is always in a pre-tightened state.

[0010] Preferably, the guide groove of the rack push rod is divided into three sections, namely a linear guide groove, a downward guide groove and an upward guide groove.

[0011] Preferably, the downward guide groove and the upward guide groove are respectively located at both ends of the linear guide groove. When the guide slider moves into the downward guide groove, the rack push rod reaches the retraction limit; when the guide slider moves into the upward guide groove, the rack push rod reaches the extension limit.

[0012] Preferably, after the guide slider enters the upward guide groove, the L-shaped swing rod rotates around the central axis of the rotating ring, causing the contact component at the end of the second swing arm to swing until the contact touches the contact switch, reaching the extension limit of the rack push rod; when the guide slider moves into the downward guide groove, the L-shaped swing rod rotates around the central axis of the rotating ring, causing the contact component at the end of the second swing arm to swing until the contact touches the contact switch, reaching the retraction limit of the rack push rod.

[0013] Preferably, the rack push rod moves along the chute inside the machine housing, and the inclination angle of this chute is 2 - 5 degrees.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] A microswitch trigger mechanism is equipped inside the door pusher, which can detect the extension limit and retraction limit of the rack push rod. Specifically, an L-shaped swing rod is set. One end of this L-shaped swing rod moves along with the rack push rod, and the other end swings to contact the contact switches on both sides, detecting the extension limit and retraction limit of the rack push rod, and controlling the operation of the motor through the signals fed back by the contact switches, thereby realizing intelligent control. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the state of the microswitch trigger mechanism provided by the present utility model at the extension limit;

[0017] Figure 2 is a schematic diagram of the state of the microswitch trigger mechanism provided by the present utility model at the retraction limit;

[0018] Figure 3 is an installation schematic diagram of the microswitch trigger mechanism provided by the present utility model and the rack push rod;

[0019] Figure 4 is an exploded view of the microswitch trigger mechanism provided by the present utility model;

[0020] Figure 5 is a structural schematic diagram of the rack push rod provided by the present utility model.

[0021] In the figure: 1. L-shaped swing rod; 2. Rotating ring; 3. Guide slider; 4. Contact component; 5. Contact switch; 100. Machine housing; 200. Rack push rod; 201. Guide groove; 201a. Linear guide groove; 201b. Downward guide groove; 201c. Upward guide groove; 401. Contact holder; 402. Contact; 403. Pre-tightening spring. Specific embodiments

[0022] The following further detailed description of the present invention is made in conjunction with the accompanying drawings and specific embodiments. According to the following description and claims, the advantages and features of the present invention will be clearer. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for the purpose of facilitating and clearly assisting in explaining the purpose of the embodiments of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0024] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations. Embodiment

[0025] The present invention provides a push rod microswitch trigger mechanism based on a door pusher. Please refer to Figures 1 - 3, including an L-shaped swing rod 1, the corner of the L-shaped swing rod 1 is a rotating ring 2, and it is rotationally connected to a pin shaft in the housing 100 through the rotating ring 2; a guiding slider 3 is provided at the end of the first swing arm of the L-shaped swing rod 1, and a contact component 4 is provided at the end of the second swing arm; when the rack push rod 200 moves linearly, the guiding slider 3 at the end of the first swing arm slides in a guiding groove 201 opened on the rack push rod 200, and as the angle of the guiding groove 201 changes, it drives the L-shaped swing rod 1 to rotate around the central axis of the rotating ring 2, so that the contact component 4 at the end of the second swing arm swings left and right; a set of contact switches 5 are respectively provided on both sides of the contact component 4, and as the contact component 4 at the end of the second swing arm swings to contact the contact switches 5 on both sides, it respectively corresponds to the extension limit and retraction limit of the rack push rod 200.

[0026] A microswitch trigger mechanism is equipped in the door pusher, which can detect the extension limit and retraction limit of the rack push rod. Specifically, an L-shaped swing rod is set. One end of the L-shaped swing rod moves with the rack push rod, and the other end swings to contact the contact switches on both sides, detecting the extension limit and retraction limit of the rack push rod, and controlling the operation of the motor through the signals fed back by the contact switches, so as to achieve intelligent control.

[0027] Specifically, please refer to Figure 4 , the contact component 4 includes a contact holder 401, and a contact 402 is movably connected to each side of the contact holder 401, and the contact holder 401 is fixedly connected to the end of the second swing arm of the L-shaped swing rod 1. As the second swing arm swings, the contact 402 correspondingly contacts the contact switch 5 on the same side.

[0028] Furthermore, a pre-tightening spring 403 is provided between the two contacts 402, and the pre-tightening spring 403 is always in a pre-tightened state, so as to provide a thrust when the contact 402 contacts the contact switch 403, making the two contact stably.

[0029] Specifically, as Figure 5 shown, the guiding groove 201 of the rack push rod 200 is divided into three sections, namely a linear guiding groove 201a, a downward guiding groove 201b and an upward guiding groove 201c; the downward guiding groove 201b and the upward guiding groove 201c are respectively located at both ends of the linear guiding groove 201a. When the guiding slider 3 moves into the downward guiding groove 201b, the rack push rod 200 reaches the retraction limit; when the guiding slider 3 moves into the upward guiding groove 201c, the rack push rod 200 reaches the extension limit.

[0030] Specifically, when the guiding slider 3 enters the upward guiding groove 201c, the L-shaped swing rod 1 rotates around the central axis of the rotating ring 2, causing the contact component 4 at the end of the second swing arm to swing until the contact 402 touches the contact switch 5, reaching the extension limit of the rack push rod 200; when the guiding slider 3 moves to the downward guiding groove 201b, the L-shaped swing rod 1 rotates around the central axis of the rotating ring 2, causing the contact component 4 at the end of the second swing arm to swing until the contact 402 touches the contact switch 5, reaching the retraction limit of the rack push rod 200.

[0031] In this embodiment, the rack push rod 200 moves along the sliding groove inside the machine housing 100, and the inclination angle of this sliding groove is 2 - 5 degrees. Since the door panel of the dishwasher rotates around a rotating shaft on one side to open and close, and in order to minimize the opening force as much as possible, the pusher is installed on the other side far from the rotating shaft. Therefore, during the opening process of the door panel of the dishwasher, the door panel is gradually inclined. To ensure that the rack push rod 200 is always in effective contact with the door panel, the inclination angle of the sliding groove is set to 2 - 5 degrees, that is, the rack push rod 400 extends obliquely at 2 - 5 degrees, thereby pushing the door panel open.

[0032] The above description is only for the description of the preferred embodiments of the present invention, and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the field of the present invention based on the above disclosure are within the protection scope of the claims.

Claims

1. A push rod micro switch trigger mechanism based on a door pusher, characterized in that: It comprises an L-shaped swing arm (1), wherein the corner of the L-shaped swing arm (1) is a rotating ring (2) which is rotatably connected to a pin shaft in a housing (100) via the rotating ring (2); A guide slider (3) is provided at the first swing arm end of the L-shaped swing arm (1), and a contact assembly (4) is provided at the second swing arm end; when the rack push rod (200) moves in a straight line, the guide slider (3) at the first swing arm end slides in a guide groove (201) provided on the rack push rod (200), and as the angle of the guide groove (201) changes, the L-shaped swing arm (1) is driven to rotate around the central axis of the rotating ring (2), thereby causing the contact assembly (4) at the second swing arm end to swing left and right; A group of contact switches (5) are respectively provided on both sides of the contact assembly (4); as the contact assembly (4) at the end of the second swing arm swings, the contact switches (5) on both sides are contacted, corresponding to the extension limit position and the retraction limit position of the rack push rod (200) respectively.

2. The push rod micro switch trigger mechanism based on the door pusher according to claim 1, characterized in that: The contact assembly (4) comprises a contact frame (401), and a contact (402) is movably connected to each side of the contact frame (401), and the contact frame (401) is fixedly connected to the end of the second swing arm of the L-shaped swing rod (1), and as the second swing arm swings, the contact (402) correspondingly contacts the contact switch (5) on the same side.

3. The push rod micro switch triggering mechanism based on the door pusher as claimed in claim 2, characterized in that: A preload spring (403) is provided between the two contacts (402), and the preload spring (403) is always in a preload state.

4. The push rod micro switch triggering mechanism based on the door pusher according to claim 1, characterized in that: The guide groove (201) of the rack push rod (200) is divided into three sections, namely a linear guide groove (201a), a downward guide groove (201b) and an upward guide groove (201c).

5. The push rod micro switch triggering mechanism based on the door pusher as claimed in claim 4, characterized in that: The downward guide groove (201b) and the upward guide groove (201c) are respectively located at two ends of the linear guide groove (201a); when the guide slider (3) moves into the downward guide groove (201b), the rack push rod (200) reaches a retracted limit position; when the guide slider (3) moves into the upward guide groove (201c), the rack push rod (200) reaches an extended limit position.

6. The push rod micro switch triggering mechanism based on the door pusher as claimed in claim 5, characterized in that: When the guide slider (3) enters the upward guide groove (201c), the L-shaped swing arm (1) rotates around the central axis of the rotating ring (2) so that the contact assembly (4) at the end of the second swing arm swings until the contact (402) contacts the contact switch (5) and reaches the extension limit of the rack push rod (200); when the guide slider (3) moves to the downward guide groove (201b), the L-shaped swing arm (1) rotates around the central axis of the rotating ring (2) so that the contact assembly (4) at the end of the second swing arm swings until the contact (402) contacts the contact switch (5) and reaches the retraction limit of the rack push rod (200).

7. The push rod micro switch triggering mechanism based on the door pusher according to claim 1, characterized in that: The rack push rod (200) moves along a slide groove in the housing (100), and the inclination angle of the slide groove is 2-5 degrees.

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