Door assembly for a device and a monitor

Abstract

This invention provides a door assembly for a device and a monitor. The device includes a housing, and the door assembly includes: a door rotatably mounted on the housing; an elastic member disposed between the door and the housing for pushing the door from a closed position to an open position; and an electromagnetic unlocking mechanism acting on the door, which locks the door in the closed position when power is off, and unlocks the door in the closed position when power is on, so that the elastic member can rotate the door from the closed position to the open position. The door assembly for the device according to this invention allows the user to open the door without having to grip and apply force, thus providing convenience for the user.

Description

Technical Field

[0001] This utility model relates to a door assembly for a device and a monitor including such a door assembly for a device. Background Technology

[0002] Devices such as patient monitors typically have backup batteries to power the monitor in the absence of AC power. The batteries are housed in a battery compartment inside the monitor, which has a door on its casing that can be opened and closed. When a battery needs replacing, the door is opened to remove the old battery and replace it with a new one, after which the door is closed. Current monitors require the battery compartment door to be opened by gripping and applying force, and then closed manually after battery replacement. This method of opening the battery compartment door by gripping and applying force is not only inconvenient but also poses a potential risk of contamination and / or infection between the user and the device.

[0003] Therefore, there is a need to propose a door assembly for the device. Utility Model Content

[0004] The purpose of this invention is to overcome at least one of the defects in the prior art and provide a door assembly for a device and a monitor including the door assembly for the device. This door assembly for the device can open the door without the user having to grasp the door and apply force, thereby providing the user with convenient operation for opening the door.

[0005] According to one aspect of the present invention, a door assembly for a device is provided, the device including a housing, characterized in that the door assembly comprises:

[0006] A door that is rotatably mounted on the housing;

[0007] An elastic element disposed between the door and the housing for pushing the door to rotate from a closed position to an open position; and

[0008] An electromagnetic unlocking mechanism acts on the door, which locks the door in the closed position when power is off, and unlocks the door in the closed position when power is on, so that the door can be rotated from the closed position to the open position by the elastic member.

[0009] Preferably, the elastic element includes a torsion spring disposed on a pivot for rotatably mounting the door onto the housing.

[0010] Preferably, the electromagnetic unlocking mechanism includes:

[0011] A lever element that is rotatably supported;

[0012] Electromagnetic components with electromagnetic coils;

[0013] An actuating pin capable of moving under the electromagnetic force generated by the electromagnetic component, wherein the free end of the actuating pin is positioned adjacent to or abutting against one end of the lever member; and

[0014] A return spring acts on the lever to enable the lever to rotate to its initial position;

[0015] A locking part is provided on one of the extension on the inner side of the door and the other end of the lever, and a blocking part is provided on the other of the extension on the inner side of the door and the other end of the lever. The blocking part can act with the locking part to keep the door in the closed position locked, and can disengage from the locking part to unlock the door in the closed position.

[0016] Preferably, the locking part is a locking recess, the blocking part is a locking protrusion, and the locking protrusion can be inserted into the locking recess.

[0017] Preferably, the extension is an L-shaped hook portion disposed on the inner side of the door and defining the locking recess, one arm of the L-shaped hook portion is connected to the inner side of the door, the other arm of the L-shaped hook portion is bent upward, and the locking protrusion is the portion that protrudes downward or bends from the other end of the lever.

[0018] Preferably, the upward end face of the other arm of the L-shaped hook and the downward end face of the downward protruding or bent portion of the locking protrusion are respectively formed as matching inclined surfaces to guide the locking protrusion into the locking recess.

[0019] Preferably, the electromagnetic unlocking mechanism further includes a limiting portion for keeping the lever in the initial position in a horizontal state.

[0020] Preferably, the electromagnetic unlocking mechanism further includes a base plate, the lever is rotatably supported on the base plate by a support flange integrally formed with the base plate, and the limiting portion is also integrally formed with the base plate.

[0021] Preferably, the electromagnetic unlocking mechanism further includes an end plate integrally formed with the substrate at one end, and the electromagnetic component is fastened to the end plate.

[0022] Preferably, the door assembly further includes an emergency button disposed on the housing, the emergency button being used to unlock the door in the closed position so as to rotate it to the open position.

[0023] Preferably, the door assembly further includes an emergency button disposed on the housing and used to unlock the door in the closed position for rotation to the open position. The emergency button is mounted to the housing via a resiliently deformable mounting piece, and includes a button panel and an actuating portion protruding inwardly from the button panel.

[0024] A protrusion is provided at the other end of the lever on the side opposite to the blocking part, and a cavity or opening is formed on the protrusion facing the emergency button;

[0025] When the emergency button is pressed, the actuating part is inserted into the cavity or opening to rotate the lever, thereby disengaging the blocking part from the locking part; when the emergency button is released, the actuating part is removed from the cavity or opening by the action of the mounting plate.

[0026] Preferably, the actuating part has a first inclined surface formed at the top of its free end, and the cavity or opening has a second inclined surface that matches the first inclined surface.

[0027] Preferably, the device is a patient monitor, and the door is a door for accessing the battery compartment of the patient monitor.

[0028] According to another aspect of the present invention, a monitor is provided, characterized in that the monitor includes a door assembly for the device as described above.

[0029] According to the present invention, a door assembly for a device, having an elastic element disposed between the door and the housing and an electromagnetic unlocking mechanism acting on the door, eliminates the need for the user to grip the door and apply force; the door can be opened simply by operating, for example, a touch button on a display screen, thus providing the user with convenient door-opening operation. A monitor according to the present invention, including the door assembly for a device as described above, can reduce or prevent contamination and / or infection caused by frequent contact between the user and the monitor, thereby avoiding potential risks. Attached Figure Description

[0030] Figure 1 A portion of a monitor having a door assembly for a device according to a preferred embodiment of the present invention is shown schematically in a perspective view;

[0031] Figure 2 yes Figure 1 A 3D view of a portion of the monitor shown from the other side;

[0032] Figure 3 yes Figure 1 An exploded perspective view of a portion of the patient monitor shown.

[0033] Figure 4 An electromagnetic unlocking mechanism for a door assembly of a device according to a preferred embodiment of the present invention is schematically shown in a perspective view.

[0034] Figure 5 yes Figure 4 A cross-sectional view of the electromagnetic unlocking mechanism shown.

[0035] Figure 6 A 3D diagram schematically shows a portion of the monitor's housing with the electromagnetic unlocking mechanism installed in place.

[0036] Figure 7 yes Figure 6 The diagram shows a cross-sectional view of the electromagnetic unlocking mechanism and a portion of the monitor's housing, with the door in the locked position.

[0037] Figure 8 yes Figure 6 The diagram shows a cross-sectional view of a portion of the electromagnetic unlocking mechanism and the housing of the monitor, wherein the electromagnetic unlocking mechanism is actuated to open the door;

[0038] Figure 9 yes Figure 6 The diagram shows a cross-sectional view of the electromagnetic unlocking mechanism and a portion of the monitor's housing, wherein the electromagnetic unlocking mechanism returns to its initial position after the door is opened;

[0039] Figure 10 A 3D diagram schematically shows a portion of the monitor's housing with the electromagnetic unlocking mechanism installed in place.

[0040] Figure 11 A 3D view schematically shows a portion of the monitor's housing installed in place, viewed from the other side;

[0041] Figure 12 yes Figure 10 and Figure 11 The diagram shows a cross-sectional view of the electromagnetic unlocking mechanism and a portion of the monitor's housing, with the door in the locked position.

[0042] Figure 13 yes Figure 10 and Figure 11 The diagram shows a cross-sectional view of a portion of the electromagnetic unlocking mechanism and the housing of the monitor, wherein the electromagnetic unlocking mechanism is actuated to open the door; and

[0043] Figure 14 yes Figure 10 and Figure 11 The diagram shows a cross-sectional view of the electromagnetic unlocking mechanism and a portion of the monitor's housing, where the electromagnetic unlocking mechanism returns to its initial position after the door is opened. Detailed Implementation

[0044] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it should be understood that the drawings are only used to illustrate the present invention and do not constitute a limitation on the present invention.

[0045] Figure 1 A portion of a monitor having a door assembly for a device according to a preferred embodiment of the present invention is shown schematically in a perspective view. Figure 2 yes Figure 1 A 3D view of a portion of the monitor from the other side. Figure 3 yes Figure 1 The diagram shows an exploded perspective view of a portion of the patient monitor. It should be understood that the patient monitor also includes another housing portion and other functional components disposed within the space defined by the shown housing portion and the other housing portion. However, since this invention does not involve improvements to the other housing portion and other functional components of the patient monitor, therefore... Figure 1-3 The monitor's other housing and functional components are omitted to more clearly show the monitor for the door assembly of the device according to a preferred embodiment of the present invention. Figure 1-3 As shown, the bottom housing 1 of the monitor includes a base plate 3 and circumferential sidewalls 5 extending upward from the base plate 3. An upper housing 7 is mounted on the bottom housing 1, and together the bottom housing 1 and the upper housing 7 define space for housing various functional components of the monitor. Figure 1-3 Only a portion of the upper housing 7 is shown. The battery compartment 9 of the monitor is mounted on the bottom housing 1. The battery compartment 9 is formed as a frame structure that defines a receiving space 13 for removably receiving batteries 11. The door assembly for the device according to this invention includes an operable door 15 disposed on the housing of the monitor at a position corresponding to the entrance / exit of the receiving space 13 defined by the battery compartment 9, and an electromagnetic unlocking mechanism 17 for unlocking the door 15 from a locked state.

[0046] An opening 19 is provided on the housing of the monitor at a position corresponding to the entrance / exit of the receiving space 13 defined by the battery compartment 9. A door 15 is rotatably mounted on the bottom housing 1 via a pivot 21 to close the opening 19. Preferably, a torsion spring 23 is fitted on the pivot 21, with one arm of the torsion spring 23 abutting against the bottom housing 1 and the other arm abutting against the inner wall of the door 15 facing the battery compartment 9, so that the torsion spring 23 always tends to push the door 15 from the closed position to the open position. To prevent the door 15 from suddenly rotating from the closed position to the open position when pushed, a damping ring 25 can be provided on the pivot 21. A locking part 26 is also provided on the inner side of the door 15. In a preferred embodiment, the locking part 26 is an L-shaped hook provided on the inner side of the door 15, with one arm of the L-shaped hook connected to the inner side of the door 15 and the other arm of the L-shaped hook bent upwards. In the preferred embodiment, the locking part 26 is integrally formed on the door 15, but the locking part 26 may be formed separately from the door 15 and subsequently installed on the door 15. Although in the preferred embodiment the door 15 is located on the bottom housing 1 of the monitor, it should be understood that it can be located at any suitable position on the housing depending on the location of items that need to be replaced, such as batteries. Furthermore, instead of the torsion spring 23, other elastic elements such as spring sheets disposed between the door 15 and the bottom housing 1 may be used to push the door 15 from the closed position to the open position.

[0047] Figure 4 A perspective view schematically illustrates an electromagnetic unlocking mechanism for a door assembly of a device according to a preferred embodiment of the present invention. Figure 5 yes Figure 4 The diagram shows a cross-sectional view of the electromagnetic unlocking mechanism. Figure 3-5As shown, the electromagnetic unlocking mechanism 17 includes a plate-shaped base plate 27, with support flanges 29 provided on both longitudinal sides of the base plate 27. Preferably, a plate-shaped lever 31 is rotatably supported on the support flanges 29 at the middle portion via a support shaft 33, such that when the lever 31 rotates around the support shaft 33, one end rises and the other end falls, and vice versa. Although in the preferred embodiment the support flanges 29 are integrally formed with the base plate 27, the support flanges 29 can be formed separately from the base plate 27 and subsequently assembled onto the base plate 27. The electromagnetic unlocking mechanism 17 also includes an electromagnetic component 35 having an electromagnetic coil, and an actuating pin 37 capable of moving under the electromagnetic force generated by the electromagnetic component 35. The free end of the actuating pin 37 is positioned adjacent to or abutting against one end of the lever 31. For this purpose, an end plate 39 is provided at one end of the base plate 27, and the electromagnetic component 35 can be fastened to the end plate 39 by screws 41, such that the free end of the actuating pin 37 is positioned adjacent to or abutting against one end of the lever 31. Although in the preferred embodiment the end plate 39 is integrally formed with the base plate 27, the end plate 39 and the base plate 27 can be formed separately and subsequently assembled onto the base plate 27. The electromagnetic unlocking mechanism 17 also includes a return spring 43 acting on the lever 31 to rotate the lever 31 to its initial position. In the preferred embodiment, the return spring 43 is disposed on the side of the base plate 27 opposite to the actuating pin 37 by means of a positioning bar 45 and a washer 47 fixed to the base plate 27. The positioning bar 45 can pass through a through hole 49 on the base plate 27, which is preferably an elongated hole, so that the positioning bar 45 does not obstruct the rotation of the lever 31. It should be understood that the return spring 43 can be disposed in different ways as understood by those skilled in the art; for example, a recess for receiving the end of the return spring can be provided on the opposite surfaces of the base plate 27 and the lever 31 without the need for the positioning bar 45 and the washer 47 for accommodating the return spring 43. Furthermore, the return spring 43 can be disposed at different positions on the base plate 27 as needed and different types of springs, such as compression or tension springs, can be selected. A blocking portion 51 is provided at the other end of the lever 31, i.e., the end away from the actuating pin 37, so that it can interact with the locking portion 26 on the door 15 to keep the door 15 in the locked position. In the preferred embodiment, the free end of the L-shaped locking portion 26 on the door 15 faces upward, and the blocking portion 51 is the portion that protrudes downward from the other end of the lever 31. It should be understood that it is also possible for the free end of the L-shaped locking portion 26 on the door 15 to face downward and for the blocking portion 51 to protrude upward from the other end of the lever 31. In the preferred embodiment, the base plate 27, the support flange 29, and the end plate 39 are integrally formed as a single mounting plate, so that the lever 31, the electromagnetic component 35, the actuating pin 37, and the return spring 43 can be assembled onto the mounting plate, so that the electromagnetic unlocking mechanism 17 is pre-assembled as a single component.When the electromagnetic unlocking mechanism 17 needs to be installed, simply screw the screw 53 through the screw hole 57 on the side wing 55 of the base plate 27 and screw it into the battery compartment 9 to install the electromagnetic unlocking mechanism 17 in the required position. It should be understood that it is also feasible to install the lever 31, electromagnetic component 35, actuating pin 37 and return spring 43 on other components inside the device without the need for a mounting plate.

[0048] In the preferred embodiment, the electromagnetic force drives the actuating pin 37 to rotate the lever clockwise, and the spring force of the return spring 43 causes the lever to rotate counterclockwise. However, it should be understood that by changing the positions of the actuating pin 37 and the return spring 43, it can also be configured such that the electromagnetic force drives the actuating pin 37 to rotate counterclockwise, and the spring force of the return spring 43 causes the lever to rotate clockwise. Furthermore, although in the preferred embodiment, the locking part 26 is an L-shaped hook provided on the inner side of the door 15 and a blocking part 51 is formed at the other end of the lever 31, it should be understood that the locking part can be presented as a locking recess on one of the extension on the inner side of the door 15 and the other end of the lever 31, and the blocking part can be presented as a locking protrusion on one of the extension on the inner side of the door 15 and the other end of the lever 31.

[0049] Figure 6 The diagram schematically shows a portion of the monitor's housing with the electromagnetic unlocking mechanism installed in place. Figure 7 yes Figure 6 The diagram shows a cross-sectional view of the electromagnetic unlocking mechanism and a portion of the monitor's housing, with the door in the locked position. Figure 8 yes Figure 6 The diagram shows a cross-sectional view of a portion of the electromagnetic unlocking mechanism and the housing of the monitor, wherein the electromagnetic unlocking mechanism is actuated to open the door, and Figure 9 yes Figure 6 The diagram shows a cross-sectional view of the electromagnetic unlocking mechanism and a portion of the monitor's housing, where the electromagnetic unlocking mechanism returns to its initial position after the door is opened. For simplicity, only a portion of the bottom housing 1 on which the electromagnetic unlocking mechanism and door are mounted is shown in 6-10, while other parts of the monitor are omitted. Figure 6 and 7 As shown, when the electromagnetic unlocking mechanism 17 is installed in the monitor, under the pushing force of the return spring 43, the lever 31 rotates around the support shaft 33, causing the blocking part 51 at the other end of the lever 31 to insert into the recess formed by the locking part 26 on the door 15 and act with the locking part 26, thereby preventing the door 15 from opening. Figure 6 The closed position is pivoted as shown. Figure 9The open position is shown. When it is necessary to open door 15 to replace the battery, the operator only needs to operate the switch of electromagnetic component 35 (not shown, but could be, for example, a touch button on a display screen) to supply power to electromagnetic component 35. The electromagnetic force generated by electromagnetic component 35 overcomes the elastic force of return spring 43 and moves along... Figure 7 The downward-direction drive actuating pin 37 pushes the lever 31 downward, causing the lever 31 to rotate clockwise around the support shaft 33. This raises the other end of the lever 31, causing the blocking portion 51 at the other end of the lever 31 to disengage from the recess formed by the locking portion 26 on the door 15 and separate from the locking portion 26. As a result, the door 15 rotates counterclockwise around the pivot 21 under the action of the torsion spring 23. Figure 8 The open position is shown. After the electromagnetic component 35 is de-energized, the electromagnetic force disappears, and under the elastic force of the return spring 43, the lever 31 rotates counterclockwise around the support shaft 33 to the position shown. Figure 9 The initial position is shown.

[0050] To keep the lever 31 in its initial position substantially horizontal, the electromagnetic unlocking mechanism 17 may further include a limiting portion. In a preferred embodiment, the limiting portion includes an upwardly bent portion 59 formed at the other end of the base plate 27 and a horizontally bent portion 61 formed on the end plate 39. The upright bent portion 59 and the horizontally bent portion 61 contact the lever 31 so that when the return spring 43 pushes the lever 31 to rotate counterclockwise, it can only rotate to a substantially horizontal position. It should be understood that it is also feasible for the limiting portion to include only one of the upright bent portion 59 and the horizontally bent portion 61.

[0051] After replacing the battery, rotating door 15 clockwise around pivot 21 will rotate door 15 to the desired position. Figure 7 The closed position shown causes the blocking portion 51 at the other end of the lever 31 to be inserted again into the recess formed by the locking portion 26 on the door 15 and to act on the locking portion 26, preventing the door 15 from being accidentally opened. In order to allow the blocking portion 51 at the other end of the lever 31 to be smoothly inserted into the recess formed by the locking portion 26 on the door 15, the lower end face of the blocking portion 51 at the other end of the lever 31 and the upper end face of the other arm of the locking portion 26 on the door 15 are respectively formed as matching bevels, such as the bevel 51a on the blocking portion 51 at the other end of the lever 31 and the bevel 26a on the locking portion 26 on the door 15, so as to guide the blocking portion 51 at the other end of the lever 31 into the recess formed by the locking portion 26 on the door 15, thereby facilitating the rotation of the door 15 from the open state to the closed state.

[0052] To ensure that the door 15 can be opened even in emergency situations such as power outages or malfunctions of the electromagnetic component 35 of the electromagnetic unlocking mechanism 17, the door assembly for the device according to a preferred embodiment of the present invention also includes an emergency button 63 disposed on the housing. Figure 3 As shown, the emergency button 63 includes a button panel 63a and an actuating portion 63b protruding inward from the button panel 63a. The emergency button 63 is mounted into an opening 69 in the housing of the monitor (e.g., the upper housing 67) via a resiliently deformable mounting piece 65. Specifically, the emergency button 63 is fastened to the mounting piece 65, which is in turn fixed to the inside of the monitor housing by screws 71. A protrusion 73 is provided at the other end of the lever member 31 on the side opposite to the blocking portion 51, and the protrusion 73 forms a cavity or opening 75 facing the emergency button 63.

[0053] Figure 10 The diagram schematically shows a portion of the monitor's housing with the electromagnetic unlocking mechanism installed in place. Figure 11 A 3D schematic diagram shows, from another side, a portion of the housing of the installed electromagnetic unlocking mechanism and the monitor, as well as... Figure 12 yes Figure 10 and Figure 11 The diagram shows a cross-sectional view of the electromagnetic unlocking mechanism and a portion of the monitor's housing, with the door in the locked position. Figure 10 and 11 and Figure 6 The difference lies in Figure 10-11 An emergency button 63 has been added to the upper housing of the monitor. The emergency button 63 is installed in an opening 69 on the upper housing of the monitor. It should be understood that the emergency button 63 can be installed in a suitable position on other housing parts depending on the position of the electromagnetic unlocking mechanism 17. When the electromagnetic unlocking mechanism 17 is in place, the actuating part 63b of the emergency button 63 faces the recess or opening 75 of the protrusion 73, such as... Figure 10 and 12 As shown. Figure 13 yes Figure 10 and Figure 11 The diagram shows a cross-sectional view of a portion of the electromagnetic unlocking mechanism and the housing of the monitor, wherein the electromagnetic unlocking mechanism is actuated to open the door. Figure 13As shown, when the operator presses the emergency stop button 63, the mounting plate 65 elastically deforms and moves the emergency stop button 63 toward the recess or opening 75 of the protrusion 73. This causes the actuating part 63b of the emergency stop button 63 to insert into the recess or opening 75 of the protrusion 73 and push the protrusion 73 upward, causing the lever 31 to rotate clockwise around the support shaft 33. The other end of the lever 31 rises, thereby causing the blocking part 51 at the other end of the lever 31 to disengage from the recess formed by the locking part 26 on the door 15. As a result, the door 15 rotates counterclockwise around the pivot 21 under the action of the torsion spring 23. Figure 13 The opening position is shown. To allow the blocking portion 51 at the other end of the lever 31 to disengage from the recess formed by the locking portion 26 on the door 15 when the actuating portion 63b is inserted into the recess or opening 75 of the protrusion 73, the actuating portion 63b has a dimension that gradually decreases towards its free end (i.e., towards the protrusion 73) in the vertical direction. In a preferred embodiment, the actuating portion 63b has a first inclined surface 63c formed at the top of its free end, and the sidewall of the recess or opening 75 of the protrusion 73 opposite to the top of the free end of the actuating portion 63b can be formed with a second inclined surface 75a that matches the first inclined surface 63c of the actuating portion 63b. After the operator releases the emergency button 63, the mounting plate 65 returns the emergency button 63 back to the opening 69 on the housing, the actuating portion 63b of the emergency button 63 disengages from the recess or opening 75 of the protrusion 73, and the lever 31 rotates counterclockwise around the support shaft 33 under the force of the return spring 43. Figure 14 The initial position is shown. After replacing the battery, rotating door 15 clockwise around pivot 21 will rotate door 15 to the position shown. Figure 12 The closed position is shown. In this way, by setting up an additional emergency button 63 to actuate the electromagnetic unlocking mechanism 17, the door 15 can be opened in an emergency without significantly changing the structure of the electromagnetic unlocking mechanism or adding other components.

[0054] The monitor with the door assembly for the device according to this utility model can open the battery compartment door without the user having to grasp the door and apply force. The door can be opened simply by operating, for example, a touch button on the display screen, thus providing the user with convenient door opening operation. At the same time, it can reduce or prevent contamination and / or infection caused by frequent contact between the user and the monitor, thereby avoiding potential risks.

[0055] Although the present invention has been described in detail using a patient monitor as an example, it should be understood that this detailed description is for illustrative purposes only and does not constitute a limitation thereof. Those skilled in the art will understand that the door assembly for a device according to the present invention can be used in any device that requires an openable door. The scope of the present invention is determined by the technical solutions defined in the claims.

Claims

1. A door assembly for an appliance, the appliance comprising a housing, characterized in that, The gate assembly includes: A door (15) is rotatably mounted on the housing. An elastic element disposed between the door (15) and the housing for pushing the door (15) from the closed position to the open position; and An electromagnetic unlocking mechanism (17) acts on the door (15), which can lock the door (15) in the closed position when the power is off, and can unlock the door (15) in the closed position when the power is on, so that the door (15) can be rotated from the closed position to the open position by the elastic member.

2. The door assembly for an appliance of claim 1, wherein, The elastic element includes a torsion spring (23) disposed on a pivot (21) for rotatably mounting the door (15) onto the housing.

3. The door assembly for an appliance of claim 1, wherein, The electromagnetic unlocking mechanism (17) includes: A lever element (31) that is rotatably supported. Electromagnetic components with electromagnetic coils (35); An actuating pin (37) movable under the electromagnetic force generated by the electromagnetic component (35), wherein the free end of the actuating pin (37) is positioned adjacent to or against one end of the lever (31); and A return spring (43) acts on the lever (31) to enable the lever (31) to rotate to the initial position. A locking part is provided on one of the extension on the inner side of the door (15) and the other end of the lever (31), and a blocking part (51) is provided on the other of the extension on the inner side of the door (15) and the other end of the lever (31). The blocking part can act with the locking part to keep the door (15) in the closed position locked, and can disengage from the locking part to unlock the door (15) in the closed position.

4. The door assembly for an appliance of claim 3, wherein, The locking part is a locking recess, and the blocking part is a locking protrusion, which can be inserted into the locking recess.

5. The door assembly for an appliance of claim 4, wherein, The extension is an L-shaped hook portion disposed on the inside of the door (15) and defining the locking recess. One arm of the L-shaped hook portion is connected to the inside of the door (15), and the other arm of the L-shaped hook portion is bent upward. The locking protrusion is a portion that protrudes downward or bends from the other end of the lever (31).

6. The door assembly for an appliance of claim 5, wherein, The upward end face of the other arm of the L-shaped hook and the downward end face of the downward protruding or bent portion of the locking protrusion are respectively formed as matching bevels to guide the locking protrusion into the locking recess.

7. The door assembly for an appliance of claim 3, wherein, The electromagnetic unlocking mechanism (17) also includes a limiting part for keeping the lever (31) in the initial position in a horizontal state.

8. The door assembly for an appliance of claim 7, wherein, The electromagnetic unlocking mechanism (17) further includes a base plate (27), the lever (31) is rotatably supported on the base plate (27) by a support flange (29) integrally formed with the base plate (27), and the limiting portion is also integrally formed with the base plate (27).

9. The door assembly for an appliance of claim 8, wherein, The electromagnetic unlocking mechanism (17) further includes an end plate (39) integrally formed with the substrate (27) at one end, and the electromagnetic component (35) is fastened to the end plate (39).

10. The door assembly for an appliance of claim 1, wherein, The door assembly also includes an emergency button (63) disposed on the housing, the emergency button being used to unlock the door (15) in the closed position so as to rotate it to the open position.

11. The door assembly for an appliance of claim 3, wherein, The door assembly further includes an emergency button (63) disposed on the housing and used to unlock the door (15) in the closed position by rotating it to the open position. The emergency button (63) is mounted to the housing via a resiliently deformable mounting piece (65). The emergency button includes a button panel (63a) and an actuating portion (63b) protruding inwardly from the button panel (63a). A protrusion (73) is provided on the other end of the lever (31) opposite to the blocking part (51), and a cavity or opening (75) facing the emergency button (63) is formed on the protrusion (73). When the emergency button (63) is pressed, the actuating part (63b) is inserted into the cavity or opening (75) to rotate the lever (31), thereby disengaging the blocking part from the locking part; when the emergency button is released, the actuating part is removed from the cavity or opening under the action of the mounting plate.

12. The door assembly for an appliance of claim 11, wherein, The actuating part (63b) has a first inclined surface (63c) formed on the top of its free end, and the cavity or opening (75) has a second inclined surface (75a) that matches the first inclined surface (63c).

13. The door assembly for an appliance of claim 1, wherein, The device is a patient monitor, and the door is a door for accessing the battery compartment of the patient monitor.

14. A monitor characterized by The monitor includes a door assembly for the device as described in any one of claims 1-13.

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