A latch arm linkage type door lock and a home appliance

Abstract

The present application provides a kind of latch arm linkage type door lock, including bolt and locking part, locking part includes shell, power output, push rod, a pair of rotatable latch arm and elastic element, power output is fixed in shell, push rod one end is connected with power output, the other end extends and forms abutting end, latch arm one end is hinged with shell, the other end is extended to shell, the free end that can embrace bolt, latch arm extends and forms a clamping end, clamping end is clamped with push rod, elastic element is connected with latch arm and shell, so that the free end of a pair of latch arm always has the tendency of relative movement;Power output pushes push rod to move, so that latch arm moves in opposite directions and pushes bolt embraced by latch arm away from latch arm, in the present application, power output obtains electric signal and moves push rod to bolt, pushes bolt to move away from latch arm and makes a pair of latch arm move in opposite directions, so that bolt is separated from latch arm, realizes electric control unlocking.

Description

Technical Field

[0001] This invention relates to the field of household appliances, and more particularly to a latch arm linkage type door lock and a household appliance. Background Technology

[0002] Some household appliances, such as dishwashers, typically have an appliance body with a product handling chamber within it, and a door for closing the entry opening to the chamber. During operation, the door should be securely locked to prevent products being processed within the chamber from escaping the machine and potentially endangering nearby people. Therefore, a door lock is usually provided to keep the door closed, and to allow access to items inside the appliance by pushing the door away from the appliance body when needed.

[0003] For example, patent CN201310356336.7 provides a dishwasher including a body having a cleaning chamber accessible through an inlet, a door mounted on the body for locking the inlet, wherein the door is defined on its side facing the cleaning chamber by an inner wall, the inner wall providing a sealing contact surface for a sealing structure mounted on the body, a latch having a latch head fixedly mounted on the door relative to the door and a locking unit disposed on the body, the locking unit having two latch arms capable of moving in opposite directions, the latch arms holding the latch head on both sides when the door is closed, wherein the latch head abuts against the latch arms when the door is closed and pushes the latch arms away from a relatively stationary state against elastic force, wherein the latch head protrudes from the surface profile of the inner wall of the door, the latch arms including free arm ends, the free arm ends abutting against the latch head and being pushed away when the door is closed, the body including an end wall, a body cover plate suspended above the end wall and the locking unit mounted behind the end wall, the free arm ends extending from the end wall through a recess in the end wall, the recess opening toward the bottom of the body.

[0004] The locking device of the aforementioned dishwasher has the following problem: its latch arm can only be passively opened and closed by applying force to the latch head. It cannot meet the requirement of electronic unlocking. Summary of the Invention

[0005] In view of this, it is necessary to provide a latch arm linkage type door lock and household appliances that can realize electronic unlocking.

[0006] This invention provides a latch arm linkage type door lock, comprising: Door bolts, and The locking mechanism includes a housing, a power output component, a push rod, a pair of latch arms capable of relative rotation, and an elastic element. The power output component is fixed inside the housing. One end of the push rod is connected to the power output component, and the other end extends to form an abutment end. One end of the latch arm is hinged to the housing, and the other end is a free end extending outside the housing and capable of encircling the bolt. The latch arm extends to form a locking end, which engages with the push rod. The elastic element is connected to the latch arm and the housing so that the free ends of the pair of latch arms always tend to move relative to each other. The power output component pushes the push rod to move, causing the latch arms to move in opposite directions and pushing the bolt encircled by the latch arms away from the latch arms.

[0007] In other embodiments, the housing has a notch, the power output component, the push rod assembly, the latch arm, and the elastic element are disposed inside the housing, and the latch arm extends out of the notch.

[0008] In other embodiments, the power output component includes a wax motor having a telescopic end that, when extended, abuts against the push rod, thereby pushing it to move relative to the housing.

[0009] In other embodiments, the push rod is slidably embedded in the housing, the sliding direction of the push rod is perpendicular to the notch, one end of the push rod facing the notch forms an abutment end, and the other end of the push rod is detachably abutted against the power output component.

[0010] In other embodiments, the latch arm includes a rod-shaped rotating portion and a locking member. One end of the rotating portion is hinged to the housing, and the locking member is fixed to the other end of the rotating portion. The end of the locking member away from the rotating portion extends outside the housing and bends toward the other latch arm to form a hook shape.

[0011] In other embodiments, a snap-fit ​​protrusion extends from the rotating part, and a snap-fit ​​hole is provided on the push rod, with the snap-fit ​​protrusion movably embedded in the snap-fit ​​hole.

[0012] In other embodiments, the rotating portion extends toward the face of the other latch arm to form meshing teeth, and the meshing teeth on the pair of latch arms mesh with each other.

[0013] In other embodiments, the locking part further includes a triggering component and an electric switch, the electric switch being used to detect the state of the bolt assembly and the latch arm, the triggering component being movably disposed within the housing, the triggering component being capable of actuating the electric switch when the bolt body is within the latch arm.

[0014] In other embodiments, the triggering component includes a trigger rod and a rotating plate. The trigger rod is slidably connected to the push rod, and the rotating plate is rotatably disposed within the housing. One end of the rotating plate is hinged to the trigger rod, and the other end is a free end.

[0015] The present invention also provides a household appliance, including a latch arm linkage type door lock, a cabinet and a door as described in any of the above claims, wherein the door bolt is fixed to the door and the locking part is fixed to the cabinet.

[0016] The beneficial effects of this invention are as follows: This invention includes a bolt and a locking part. The locking part includes a housing, a power output component, a push rod, a pair of latch arms that can rotate relative to each other, and an elastic element. The power output component is fixed inside the housing. One end of the push rod is connected to the power output component, and the other end extends to form an abutment end. One end of each latch arm is hinged to the housing, and the other end is a free end extending outside the housing and capable of encircling the bolt. The latch arm extends to form a locking end, which engages with the push rod. The elastic element is connected to the latch arms and the housing to allow the pair of latch arms to rotate relative to each other. The free ends of the latch arms always tend to move relative to each other; the power output component pushes the push rod to move, so that the latch arms move away from each other and push the bolt, which is surrounded by the latch arms, away from the latch arms. In this invention, a power output component, a push rod, a pair of latch arms that can move relative to each other, and an elastic component are provided. After receiving an electrical signal, the power output component outputs a signal to move the push rod toward the bolt, pushes the bolt away from the latch arms, and causes the pair of latch arms to move away from each other, so that the bolt is disengaged from the latch arms, thereby achieving electronic unlocking. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the latch arm linkage type door lock in this invention; Figure 2 This is a schematic diagram of the structure of the door lock with the latch arm linkage type after removing the door lock housing according to the present invention; Figure 3 This is a schematic diagram of the internal structure of a latch-arm linkage type door lock in another embodiment; Figure 4 This is a schematic diagram of the structure of a door lock with the latch arm linkage type after removing the door lock housing in another embodiment of the present invention; Wherein: 1-door bolt, 11-bolt body, 111-thin rod; 2-Locking part, 21-Housing, 211-Notch, 22-Power output component, 221-Wax motor, 23-Push rod component, 231-Snap-fit ​​hole, 24-Latch arm, 241-Rotating part, 242-Locking component, 243-Snap-fit ​​protrusion, 244-Meshing tooth, 25-Elastic component, 26-Trigger component, 261-Trigger rod, 262-Rotating plate, 27-Electric switch. Detailed Implementation

[0019] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0020] like Figure 1-2 As shown, an embodiment of the present invention provides a latch arm linkage type door lock, which includes: a bolt 1 and a locking part 2. The locking part 2 can lock the bolt 1 partially entering the locking part 2 and can actively push the bolt 1 out of the locking part 2.

[0021] The locking part 2 includes a housing 21, a power output component 22, a push rod component 23, a pair of latch arms 24 capable of relative rotation, and an elastic element 25. The power output component 22 is fixed inside the housing 21. One end of the push rod component 23 is connected to the power output component 22, and the other end extends to form an abutment end 231. One end of the latch arm 24 is hinged to the housing 21, and the other end is a free end extending outside the housing 21 and capable of encircling the bolt 1. The latch arm 24 extends to form a locking end, which engages with the push rod component 23. The elastic element 25 is connected to the latch arm 24 and the housing 21 so that the free ends of the pair of latch arms 24 always have a tendency to move relative to each other. The power output component 22 pushes the push rod component 23 to move, so that the latch arms 24 move in opposite directions and push the bolt 1 encircled by the latch arms 24 away from the latch arms 24.

[0022] In this invention, a power output component 22, a push rod component 23, a pair of latch arms 24 that can move relative to each other, and an elastic component 25 are provided. After receiving an electrical signal, the power output component 22 outputs a signal to move the push rod component 23 toward the bolt 1, pushing the bolt 1 to move away from the latch arms 24 and causing the pair of latch arms 24 to move in opposite directions, so that the bolt 1 is disengaged from the latch arms 24, thereby realizing electronic unlocking.

[0023] Specifically, the bolt 1 includes a carrier plate and a bolt body 11. The bolt body 11 is fixed to the carrier plate, and the latch arm 24 can encircle the bolt body 11 from both sides to restrict the movement of the bolt body 11 relative to the locking part 2. In use, the carrier plate is fixed to one component, the locking part 2 is fixed to another component, and the latch arm 24 encircles the bolt body 11 to lock the two components. When the latch arm 24 releases the bolt body 11, the two components can be separated relative to each other.

[0024] The plug body 11 can take various shapes. In some feasible embodiments, the plug body 11 is cuboid. In some feasible embodiments, the plug body 11 is triangular prism; in some feasible embodiments, the plug body 11 is cylindrical.

[0025] In this embodiment, the bolt 11 is spindle-shaped, with a tapered surface at both the end near the locking part 2 and the end away from the locking part 2. This design facilitates opening and closing the door. When manually closing the door, pushing the door closer to the locking part 2 causes the tapered surface on the end of the bolt 11 near the locking part 2 to push the latch arm 24 away and rotate in opposite directions. After the bolt 11 has traveled a certain distance, the tapered surface on the end of the bolt 11 away from the locking part 2 helps the latch arm 24 to rotate relative to it, thereby encircling the bolt 11 and realizing manual closing. When electrically opening the door, the power output component 22 receives an electrical signal and pushes the push rod 23 toward the bolt 1 and abuts against it, pushing the bolt 1 to move away from the locking part 2. The push rod 23 moves to make the latch arm 24 rotate in opposite directions, forming a path for the bolt 1 to move, ultimately separating the locking part 2 from the bolt 1.

[0026] Specifically, a notch 211 is provided on the housing 21, and the power output component 22, the push rod component 23, the latch arm 24 and the elastic component 25 are disposed inside the housing 21, with the latch arm 24 extending out of the notch 211.

[0027] Specifically, the power output component 22 only needs to be able to push the push rod 23 to move relative to the housing 21. In some other feasible embodiments, the power output component 22 includes a linear motor, the telescopic end of which, when extended, can abut against the push rod 23, pushing it to move relative to the housing 21, thereby pushing the bolt 1 to move and the latch arm 24 to rotate.

[0028] In this embodiment, the power output component 22 includes a wax motor 221; the wax motor 221 has a telescopic end, and when the telescopic end of the wax motor 221 is extended, it can abut against the push rod 23, push it to move relative to the housing 21, and thereby push the bolt 1 to move and the latch arm 24 to rotate.

[0029] Furthermore, the push rod 23 is slidably embedded in the housing 21, the sliding direction of the push rod 23 is perpendicular to the notch 211, one end of the push rod 23 facing the notch 211 forms an abutment end, and the other end of the push rod 23 is detachably abutted against the power output component 22.

[0030] Specifically, the latch arm 24 includes a rod-shaped rotating part 241 and a locking member 242. One end of the rotating part 241 is hinged to the housing 21, and the locking member 242 is fixed to the other end of the rotating part 241. The end of the locking member 242 away from the rotating part 241 extends outside the housing 21 and bends into a hook shape towards the other latch arm 24. The purpose of this design is that the locking members 242 of the pair of latch arms 24 can encircle the bolt body 11, preventing the bolt body 11 from accidentally coming out between the latch arms 24.

[0031] Furthermore, a snap-fit ​​protrusion 243 extends from the rotating part 241, and a snap-fit ​​hole 231 is provided on the push rod 23. The snap-fit ​​protrusion 243 is movably embedded in the snap-fit ​​hole 231. When the push rod 23 moves, the latch arm 24 can be driven to rotate relative to the housing 21 through the cooperation between the snap-fit ​​hole 231 and the snap-fit ​​protrusion 243.

[0032] like Figure 3-4 As shown, in some feasible embodiments, the rotating part 241 extends toward the surface of the other latch arm 24 to form meshing teeth 244, and the meshing teeth 244 on the pair of latch arms 24 mesh with each other to achieve mutual linkage. Whenever the rotating part 241 drives one of the latch arms 24 to rotate, it drives the other latch arm 24 to rotate through the mutual meshing of the meshing teeth 244.

[0033] The elastic element 25 functions to drive the latch arm 24 to rotate and reset. It has multiple implementations. In some feasible embodiments, the elastic element 25 is a tension spring, with both ends fixed to the rotating part 241. When the latch arms 24 move in opposite directions, the tension spring is stretched. When there is no force between the bolt body 11 and the latch arm 24, the tension spring drives the latch arm 24 to rotate relative to it, thus resetting it.

[0034] In this embodiment, the elastic element 25 is a torsion spring. The torsion spring is sleeved at the hinge between the rotating part 241 and the housing 21, and its two ends are fixed to the rotating part 241 and the housing 21 respectively. When the bolt 11 is inserted between the latch arms 24, the latch arms 24 move in opposite directions, twisting the torsion spring. When there is no force between the bolt 11 and the latch arms 24, the torsion spring will drive the latch arms 24 to rotate relative to each other and close, thus achieving reset.

[0035] Furthermore, the locking part 2 also includes a triggering component 26 and an electric switch 27. The electric switch 27 is used to detect the state of the bolt assembly 1 and the latch arm 24. The triggering component 26 is movably disposed within the housing 21. The triggering component 26 can actuate the electric switch 27 when the bolt body 11 is within the latch arm 24.

[0036] Furthermore, a button is provided on the surface of the electric switch 27. When the bolt body 11 is in the locked position, pushing the triggering component 26 can disengage it from the button to trigger the electric switch 27.

[0037] Furthermore, the triggering component 26 includes a trigger rod 261, a rotating plate 262, and an elastic element 263. The trigger rod 261 is slidably connected to the push rod 23. The rotating plate 262 is rotatably disposed within the housing 21. One end of the rotating plate 262 is hinged to the trigger rod 261, and the other end is a free end. One end of the elastic element 263 is connected to the trigger rod 261, and the other end is connected to the housing 21. When the bolt 11 abuts against the push rod 23, it pushes the push rod 23 to move, thereby causing the trigger rod 261 to move. The trigger rod 261 drives the rotating plate 262 to rotate relative to the housing 21, causing the free end of the rotating plate 262 to disengage from the button on the surface of the electric switch 27, thereby triggering the electric switch 27.

[0038] To facilitate the engagement of the bolt body 11 with the push rod 23, a thin rod 111 extends from the bolt body 11. The thin rod 111 can pass through the gap between the latch arms 24 and engage with the end of the push rod 23.

[0039] In use, the bolt 11 moves toward the locking part 2, the bolt 11 engages with the gap between the latch arms 24, pushing the latch arms 24 to move in opposite directions, the bolt 11 further enters and abuts against the push rod 23, pushing the push rod 23 to slide relative to the housing 21, thereby causing the trigger rod 261 to move. The trigger rod 261 drives the rotating plate 262 to rotate relative to the housing 21, causing the free end of the rotating plate 262 to disengage from the button on the surface of the electric switch 27, thus triggering the electric switch 27. When the door is opened electrically, the power output component 22 receives a signal and pushes the push rod 23 to slide relative to the housing 21. The push rod 23 pushes the bolt 11 out of the housing 21 while simultaneously driving the latch arms 24 to move in opposite directions, causing the latch arms 24 to disengage from the bolt 11, allowing the bolt 11 to be smoothly pushed out, and causing the rotating plate 262 to rotate relative to the housing 21 and contact the button on the surface of the electric switch 27.

[0040] The beneficial effects of this invention are: This invention includes a bolt and a locking part. The locking part includes a housing, a power output component, a push rod, a pair of latch arms that can rotate relative to each other, and an elastic element. The power output component is fixed inside the housing. One end of the push rod is connected to the power output component, and the other end extends to form an abutment end. One end of each latch arm is hinged to the housing, and the other end is a free end extending outside the housing and capable of encircling the bolt. The latch arm extends to form a locking end, which engages with the push rod. The elastic element is connected to the latch arms and the housing to allow the pair of latch arms to rotate relative to each other. The free ends of the latch arms always tend to move relative to each other; the power output component pushes the push rod to move, so that the latch arms move away from each other and push the bolt, which is surrounded by the latch arms, away from the latch arms. In this invention, a power output component, a push rod, a pair of latch arms that can move relative to each other, and an elastic component are provided. After receiving an electrical signal, the power output component outputs a signal to move the push rod toward the bolt, pushes the bolt away from the latch arms, and causes the pair of latch arms to move away from each other, so that the bolt is disengaged from the latch arms, thereby achieving electronic unlocking.

[0041] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A latch arm linkage type door lock, characterized in that, include: Door bolts, and The locking mechanism includes a housing, a power output component, a push rod, a pair of latch arms capable of relative rotation, and an elastic element. The power output component is fixed inside the housing. One end of the push rod is connected to the power output component, and the other end extends to form an abutment end. One end of the latch arm is hinged to the housing, and the other end is a free end extending outside the housing and capable of encircling the bolt. The latch arm extends to form a locking end, which engages with the push rod. The elastic element is connected to the latch arm and the housing so that the free ends of the pair of latch arms always tend to move relative to each other. The power output component pushes the push rod to move, causing the latch arms to move in opposite directions and pushing the bolt encircled by the latch arms away from the latch arms.

2. The latch arm linkage type door lock as described in claim 1, characterized in that, The housing has a notch, and the power output component, the push rod assembly, the latch arm, and the elastic element are disposed inside the housing, with the latch arm extending out of the notch.

3. The latch arm linkage type door lock as described in claim 1, characterized in that, The power output component includes a wax motor with a telescopic end. When the telescopic end of the wax motor is extended, it can abut against the push rod and push it to move relative to the housing.

4. The latch arm linkage type door lock as described in claim 1, characterized in that, The push rod is slidably embedded in the housing, the sliding direction of the push rod is perpendicular to the notch, one end of the push rod facing the notch forms an abutment end, and the other end of the push rod is detachably abutted against the power output component.

5. The latch arm linkage type door lock as described in claim 1, characterized in that, The latch arm includes a rod-shaped rotating part and a locking member. One end of the rotating part is hinged to the housing, and the locking member is fixed to the other end of the rotating part. The end of the locking member away from the rotating part extends out of the housing and bends into the other latch arm to form a hook shape.

6. The latch arm linkage type door lock as described in claim 5, characterized in that, A snap-fit ​​protrusion extends from the rotating part, and a snap-fit ​​hole is provided on the push rod. The snap-fit ​​protrusion is movably embedded in the snap-fit ​​hole.

7. The latch arm linkage type door lock as described in claim 6, characterized in that, The rotating part extends toward the surface of the other latch arm to form meshing teeth, and the meshing teeth on the pair of latch arms mesh with each other.

8. The latch arm linkage type door lock as described in claim 7, characterized in that, The locking part also includes a triggering component and an electric switch. The electric switch is used to detect the state of the bolt assembly and the latch arm. The triggering component is movably disposed within the housing. The triggering component can actuate the electric switch when the bolt body is within the latch arm.

9. The latch arm linkage type door lock as described in claim 8, characterized in that, The triggering component includes a trigger rod and a rotating plate. The trigger rod is slidably connected to the push rod. The rotating plate is rotatably disposed inside the housing. One end of the rotating plate is hinged to the trigger rod, and the other end is a free end.

10. A household appliance, characterized in that, Includes a latch-type door lock, a cabinet, and a door as described in any one of claims 1-9, wherein the bolt is fixed to the door and the locking part is fixed to the cabinet.

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