Household appliance door lock

Abstract

The application provides a household appliance door lock, which comprises a shell, a door bolt rotatably arranged in the shell, a locking plate, an operating plate and a positioning needle, the locking plate is linked with the door bolt, the locking plate is provided with a locking plate spring, the locking plate exerts an action force on the door bolt to drive the door bolt to rotate to an open door state under the action of the locking plate spring, the operating plate is movably arranged in the shell through an operating plate spring, the positioning needle is arranged on the operating plate through a positioning needle spring, the locking plate is provided with a guide groove, the end of the positioning needle extends into the guide groove, the guide groove is provided with a locking inflection point, and the positioning needle exerts an action force on the locking plate to prevent the locking plate from returning when the positioning needle abuts against the locking inflection point. The household appliance door lock can avoid the problem that the door lock is easily opened by clothes by accident, is more reliable in use, and has the functions of pressing to open the door, electrically opening the door and elastically moving.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of home appliance accessories, in particular to a home appliance door lock. BACKGROUND

[0002] In the market of home appliances such as clothes dryers, the common handle-free door cover design makes it impossible for users to open the door by manually pulling the door; in addition, due to safety requirements, the door lock must be able to be opened by an internal pushing force of 70N. However, as the load capacity of current clothes dryers is getting larger and larger, when the load of clothes is too much, the clothes will occasionally push the door cover for a distance when the clothes are agitated and dried, and as the opening distance of the common door lock is very small, the door lock can be accidentally pushed open by the clothes. Therefore, the present application proposes a home appliance door lock. SUMMARY

[0003] The present application aims to solve the problems in the prior art, and proposes a home appliance door lock which can be manually pressed to open the door and can avoid the problem of being accidentally pushed open by clothes, and is more reliable in use.

[0004] To achieve the above-mentioned purpose, the present application proposes a home appliance door lock, which comprises a shell, a door latch rotatably installed in the shell, a locking plate, an operating plate and a positioning needle installed in the shell; the locking plate is linked with the door latch, the locking plate is provided with a locking plate spring, and the locking plate applies an action force to the door latch to drive it to rotate to an open state under the action of the locking plate spring; the operating plate is movably installed in the shell through an operating plate spring, and the positioning needle is installed on the operating plate through a positioning needle spring; the locking plate is provided with a guide groove, the end of the positioning needle extends into the guide groove, the guide groove is provided with a locking inflection point, and the positioning needle applies an action force to the locking plate to prevent it from returning when it abuts against the locking inflection point.

[0005] As a preferred embodiment, the shell is provided with a sliding limiting groove, the door latch is provided with a rotating shaft and is movably installed on the sliding limiting groove through the rotating shaft, and the shell is further provided with an elastic limiting piece, which applies an action force to the rotating shaft of the door latch to move it away from the side where the operating plate is located.

[0006] As a preferred embodiment, the elastic limiting piece is a spring, the shell is provided with a plurality of limiting columns, and each limiting column is provided with a spring, the end of the spring abuts against or is connected with the rotating shaft of the door latch.

[0007] As a preferred embodiment, the door latch is provided with a protrusion, the side of the operating plate facing the protrusion is provided with an operating arm, the door latch is linked with the operating plate through the cooperation of the protrusion and the operating arm, the operating plate moves under the abutting action of the protrusion, and the positioning needle is separated from the abutting action of the locking inflection point.

[0008] As preferred, the door latch is provided with a rotating arm, and the locking plate is provided with a sliding groove for the rotating arm of the door latch to extend into, and the door latch is linked with the locking plate through cooperation of the rotating arm and the sliding groove.

[0009] As preferred, an electromagnetic mechanism is further included, which is linked with the operation plate, and the operation plate moves under action of the electromagnetic mechanism and makes the positioning needle disengage from abutting against the locking inflection point.

[0010] The door lock has the functions of pressing to open the door, electrically opening the door and elastically moving, and is more convenient to use.

[0011] The features and advantages of the present application will be described in detail with reference to the embodiments and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is an explosion schematic view of a household appliance door lock of the present application;

[0013] Figure 2 is a door opening position sectional view of a household appliance door lock of the present application;

[0014] Figure 3 is a door opening position top view of a household appliance door lock of the present application;

[0015] Figure 4 is a door closing position sectional view of a household appliance door lock of the present application;

[0016] Figure 5 is a locking plate and positioning needle cooperation position sectional view during door closing action;

[0017] Figure 6 is a door opening action top view of a household appliance door lock of the present application;

[0018] Figure 7 is a locking plate and positioning needle cooperation position sectional view during door opening action;

[0019] Figure 8 is a elastic limiting piece and door latch cooperation state sectional view of a household appliance door lock of the present application;

[0020] Figure 9 is Figure 8 a door latch overcoming spring force of the elastic limiting piece and moving up state sectional view;

[0021] Figure 10 This is a cross-sectional view of the operating panel and door latch when the door is forced to open;

[0022] Figure 11 It is a structural schematic diagram of a locking plate of a household appliance door lock according to the present invention;

[0023] Figure 12 yes Figure 11 The main schematic diagram of

[0024] Figure 13 The present invention is a schematic structural diagram of a door latch of a household appliance door lock. [Specific implementation method]

[0025] See Figures 1 to 13 The present invention relates to a household appliance door lock, comprising a housing 1 and a door bolt 2 rotatably mounted in the housing 1. In this embodiment, the housing 1 is composed of two half-shell components. The housing 1 is provided with a lock hole 10 for a door hook 100 to extend into. A locking plate 3, an operating plate 4 and a positioning pin 5 are also mounted in the housing 1. The locking plate 3 is linked to the door bolt 2. A locking plate spring 30 is provided on the end of the locking plate 3 facing away from the door bolt 2. Under the action of the locking plate spring 30, the locking plate 3 exerts a force on the door bolt 2 to drive it to rotate to the door opening state. The operating plate 4 is movably mounted by the operating plate spring 40. In the housing 1, the positioning pin 5 is installed on the operating plate 4 through the positioning pin spring 50, and the operating plate spring 40 applies a force to the operating plate 4 to drive the positioning pin 5 to reset; the locking plate 3 is provided with a guide groove 31, and the end of the positioning pin 5 extends into the guide groove 31, and the guide groove 31 is provided with a locking inflection point 310. When the positioning pin 5 abuts against the locking inflection point 310, a force is applied to the locking plate 3 to prevent it from resetting, so that the door latch 2 remains in the locked position. When the positioning pin 5 passes the locking inflection point 310 and disengages from the abutment against the locking plate 3, the locking plate 3 is reset under the action of the locking plate spring 30.

[0026] Further, see Figure 3 、 Figure 6 、 Figure 8 、 Figure 9 A sliding limit groove 11 is provided in the shell 1, and the door latch 2 is provided with a rotating shaft 20 and is movably installed on the sliding limit groove 11 through the rotating shaft 20. An elastic limit member 7 is also provided in the shell 1, and the elastic limit member 7 applies a force on the rotating shaft 20 of the door latch 2 to move it away from the side where the operating panel 4 is located.

[0027] Further, see Figure 8 and Figure 9The elastic limiting member 7 is a spring, and a plurality of limiting posts 12 are provided in the housing 1. A spring is mounted on each limiting post 12. The end of the spring abuts against or is connected to the rotating shaft 20 of the door latch 2. In this embodiment, two limiting posts 12 are provided in the housing 1.

[0028] Further, see Figure 10 、 Figure 12 、 Figure 13 The door latch 2 is provided with a protrusion 22, and the operating plate 4 is provided with an operating arm 41 on a side facing the protrusion 22. The door latch 2 is linked to the operating plate 4 through the cooperation between the protrusion 22 and the operating arm 41. The operating plate 4 moves under the abutment of the protrusion 22, and the positioning pin 5 is released from the abutment with the locking inflection point 310. In this embodiment, the protrusion 22 is provided with a driving inclined surface or a driving arc surface.

[0029] Further, see Figure 2 、 Figure 12 、 Figure 13 The door latch 2 is provided with a swing arm 21, and the locking plate 3 is provided with a slide groove 32 for the swing arm 21 of the door latch 2 to extend into. The door latch 2 is linked with the locking plate 3 through the cooperation of the swing arm 21 and the slide groove 32.

[0030] Further, see Figure 1 、 Figure 3 、 Figure 6 、 Figure 10 , further comprising an electromagnetic mechanism 6, which is linked to the operating panel 4. Under the action of the electromagnetic mechanism 6, the operating panel 4 moves and causes the positioning pin 5 to disengage from the locking inflection point 310. In this embodiment, the driving head of the electromagnetic mechanism 6 is connected to the operating panel 4, and the operating panel 4 is provided with a slot 42 adapted to fit the driving head.

[0031] Further, see Figure 11 and Figure 12 In this embodiment, the guide groove 31 includes a door closing guide groove (corresponding to Figure 12 a→b section in the door guide groove (corresponding to Figure 12 d→e segment in the figure), and the locking inflection point 310 (corresponding to Figure 12 Point c in the figure), one side of the locking inflection point 310 has a transition slope (corresponding to Figure 12 between the cds in the ).

[0032] Working process of the present invention:

[0033] 1. Door open status:

[0034] The positioning pin 5 on the operating plate 4 is at point a of the guide groove 31 of the locking plate 3, as shown in FIG. Figure 12At this time, the positioning pin 5 has no limit. Figure 3 The locking plate 3 is positioned at the far left under the action of the locking plate spring 30, and the sliding groove 32 of the locking plate 3 drives the swing arm 21 of the door latch 2 to rotate to the door opening state. The spring presses the door latch 2, so that the door latch 2 can only rotate when the door opening force is small, and will not move along the sliding limit groove 11.

[0035] 2. Door closing action:

[0036] See Figure 4 、 Figure 5 When the door hook 100 is inserted, it drives the latch 2 to rotate, which in turn drives the swing arm 21 to rotate, and then pushes the locking plate 3 to the right. The positioning pin 5 moves along the guide groove 31 in the locking plate 3 to point b (a→b). When the door is closed, it moves leftward and resets under the action of the locking plate spring 30. The positioning pin 5 is pulled to point c in the guide groove 31. The locking plate 3 is blocked and fixed by the positioning pin 5, and the latch 2 remains unchanged, thus locking the door. At this time, refer to Figure 5 The locking plate 3 is limited by the positioning pin 5, preventing the locking plate 3 from moving left (corresponding to Figure 5 ), so that the latch 2 remains in the locked position.

[0037] 3. Door opening action:

[0038] Manual door opening: see Figure 6 and Figure 12 When the door hook 100 is reinserted, it drives the latch 2 to rotate, which in turn drives the swing arm 21 to rotate, pushing the locking plate 3 to the right. The positioning pin 5 moves along the guide slot 31 in the locking plate 3 to point d (c→d). When the door is closed, the locking plate spring 30 moves the positioning pin 5 to the left and resets it. The positioning pin 5 moves along the guide slot 31 to point e and is reset to point a by the operating plate spring 40, realizing the door opening function.

[0039] Electric door opening: see Figure 6 and Figure 12 The electromagnetic mechanism 6 is activated, the positioning pin 5 slides out from point c of the guide groove 31, and is reset to the left under the action of the locking plate spring 30. The positioning pin 5 moves to point e along the guide groove 31, and is reset to point a under the action of the operating plate spring 40 to open the door.

[0040] 4. Elastic movement function of door lock position:

[0041] See Figure 8 and Figure 9 Since both ends of the rotating shaft 20 are fixed by springs, the door latch 2 can overcome the springs and move up and down.

[0042] When the door hook 100 is forced outwards in the locked state, the locking plate 3 is limited, the sliding groove 32 is fixed, and the rotating arm 21 can only move up and down in the sliding groove 32. When the door latch 2 is pulled out, the door latch 2 keeps the angle unchanged and moves up against the spring force. When the external force disappears, the door latch 2 is reset to the initial position under the action of the spring, thereby realizing elastic movement.

[0043] 5. Forced door opening function in the locked position

[0044] Referring to Figure 10 Since the door lock is fixed at both ends by the spring, the door latch 2 can move up and down against the spring.

[0045] When the door hook 100 is forced outwards in the locked state, the locking plate 3 is limited, the sliding groove 32 is fixed, and the rotating arm 21 can only move up and down in the sliding groove 32. When the door latch 2 is pulled out, the door latch 2 keeps the angle unchanged and moves up against the spring force. When the external force disappears, the door latch 2 is reset to the initial position under the action of the spring, thereby realizing elastic movement.

[0046] The above examples are illustrative of the present application and are not limiting of the present application. Any simple transformation of the present application falls within the protection scope of the present application.

Claims

1. A household appliance door lock, comprising a housing (1), and a latch (2) rotatably mounted in the housing (1), characterized in that: A locking plate (3), an operating plate (4) and a positioning pin (5) are also installed in the housing (1); the locking plate (3) is linked to the door latch (2), and a locking plate spring (30) is provided on the locking plate (3). Under the action of the locking plate spring (30), the locking plate (3) applies a force to the door latch (2) to drive it to rotate to the door opening state; the operating plate (4) is movably installed in the housing (1) through the operating plate spring (40), and the positioning pin (5) is installed on the operating plate (4) through the positioning pin spring (50); a guide groove (31) is provided on the locking plate (3), and the end of the positioning pin (5) extends into the guide groove (31), and a locking inflection point (310) is provided on the guide groove (31). When the positioning pin (5) abuts against the locking inflection point (310), a force is applied to the locking plate (3) to prevent it from returning to its original position; The housing (1) is provided with a sliding limit groove (11), the door latch (2) is provided with a rotating shaft (20), and is movably mounted on the sliding limit groove (11) through the rotating shaft (20), and the housing (1) is also provided with an elastic limit member (7), and the elastic limit member (7) applies a force to the rotating shaft (20) of the door latch (2) to move it away from the side where the operating plate (4) is located; the door latch (2) is provided with a protrusion (22), and the operating plate (4) is provided with an operating arm (41) on the side facing the protrusion (22). The door latch (2) is linked to the operating plate (4) through the cooperation of the protrusion (22) and the operating arm (41); the operating plate (4) moves under the abutment of the protrusion (22) and causes the positioning pin (5) to be separated from the abutment with the locking inflection point (310); the door latch (2) is provided with a rotary arm (21); the locking plate (3) is provided with a slide groove (32) for the rotary arm (21) of the door latch (2) to extend into; the door latch (2) is linked to the locking plate (3) through the cooperation of the rotary arm (21) and the slide groove (32).

2. A household appliance door lock according to claim 1, characterized in that: The elastic limiting member (7) is a spring. A plurality of limiting columns (12) are provided in the housing (1). A spring is mounted on each limiting column (12). The end of the spring abuts against or is connected to the rotating shaft (20) of the door latch (2).

3. A household appliance door lock according to claim 1 or 2, characterized in that: It also includes an electromagnetic mechanism (6), which is linked to the operating plate (4). The operating plate (4) moves under the action of the electromagnetic mechanism (6) and causes the positioning pin (5) to break away from the abutment with the locking inflection point (310).

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