Mounting structure of an observation window and a washing machine

Abstract

The application discloses a mounting structure of an observation window and a washing machine. The mounting structure comprises a front panel provided with a laundry dropping opening, an observation window arranged at the laundry dropping opening, and a hinge. The hinge is provided with a hinge shaft for hinging the observation window and the front panel. The observation window is provided with a mounting area for mounting the hinge shaft. The mounting area is provided with a mounting space and a buffer space which are separated from each other. The hinge shaft moves back and forth between the mounting space and the buffer space under the action of an external force. When a user uses a large downward pressure on the opened observation window, the observation window will be inclined forward, the relative position of the hinge shaft is changed, the hinge shaft can be moved from the mounting space to the buffer space, and the observation window is prevented from falling off the machine body. The application further provides a washing machine provided with the mounting structure of the observation window.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of household appliances, in particular, relates to a mounting structure of an observation window and a washing machine. BACKGROUND

[0002] The existing laundry putting opening of the drum washing machine is provided with an observation window, the observation window is connected with the front plate of the drum washing machine through a hinge, which not only plays a role of closing the washing machine to prevent the water in the drum from overflowing, but also is beneficial to the user to observe the washing condition in the drum.

[0003] The existing observation window is installed on the front panel of the washing machine, the hinge of the washing machine has a hinge shaft for hinging between the observation window and the front panel, a positioning groove is arranged on the observation window, the hinge shaft is embedded in the positioning groove to realize the installation of the hinge shaft on the observation window; when the user opens the observation window to operate the control panel of the washing machine, especially when the user who is not yet an adult or is short opens the observation window to operate the control panel of the washing machine, the user often presses on the observation window along the upper direction, which causes the observation window to bear a large downward pressure, the large downward pressure provides a force for the observation window to move forward and downward, the force for moving forward causes the observation window to tilt forward, and the force for moving downward causes the observation window to sink downward from the machine body, since the hinge shaft is embedded in the positioning groove, the large downward pressure easily causes the observation window to tilt forward, the relative position of the hinge shaft changes, the hinge shaft is equivalent to move from front to back, which causes the hinge shaft to be separated from the positioning groove, thereby causing the observation window to fall off from the machine body and to hurt the user. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the deficiencies in the prior art, and provide a mounting structure of an observation window and a washing machine, which can make the hinge shaft jump from the positioning groove to the auxiliary positioning groove when the position changes, so as to avoid the observation window from falling off the machine body.

[0005] To solve the above technical problems, the basic idea of the technical solution of the present application is:

[0006] The present application provides a mounting structure of an observation window, which comprises a front panel provided with a laundry putting opening, an observation window arranged at the laundry putting opening, and a hinge, the hinge has a hinge shaft for hinging between the observation window and the front panel, the observation window is provided with a mounting area for mounting the hinge shaft, the mounting area is provided with a mounting space and a buffer space separated from each other, and the hinge shaft moves back and forth between the mounting space and the buffer space under the action of an external force.

[0007] Further, the mounting area is provided with a positioning groove and an auxiliary positioning groove, the mounting space is formed in the interior of the positioning groove, the buffer space is formed in the interior of the auxiliary positioning groove, the auxiliary positioning groove is arranged at the outer periphery of the positioning groove, and the hinge shaft is selectively embedded in the positioning groove and the auxiliary positioning groove.

[0008] Further, the positioning groove and the auxiliary positioning groove extend along the axial direction of the hinge shaft, and the positioning groove and the auxiliary positioning groove have coinciding portions in the extending direction.

[0009] Further, one end of the extending direction of the auxiliary positioning groove extends upward to the same level as one end of the extending direction of the positioning groove, and the other end of the extending direction of the auxiliary positioning groove extends downward to the same level as the other end of the extending direction of the positioning groove.

[0010] Further, one groove wall of the extending direction of the positioning groove is inclined to the auxiliary positioning groove, and one groove wall of the extending direction of the auxiliary positioning groove is inclined to the positioning groove, and the two groove walls are adjacently arranged and smoothly transitioned.

[0011] Further, the hinge comprises a sleeve extending along the axial direction of the hinge shaft, the sleeve is provided with a through hole in the extending direction, the hinge shaft is embedded in the sleeve through the through hole, and the sleeve is selectively embedded in the positioning groove and the auxiliary positioning groove.

[0012] Further, the observation window is provided with an opening opposite to the clothes throwing opening, the outer periphery of the opening is provided with a reinforcing plate, the reinforcing plate is stamped to form the positioning groove and the auxiliary positioning groove, and the side of the observation window opposite to the reinforcing plate is arranged at a distance from the reinforcing plate.

[0013] Further, the two ends of the hinge shaft respectively extend beyond the first part and the second part of the positioning groove, the reinforcing plate is provided with a first through hole and a second through hole respectively exposing the first part and the second part, and the extending length of each through hole is greater than or equal to the sum of the width of the positioning groove and the width of the auxiliary positioning groove.

[0014] Further, the hinge further comprises a base provided on the front side plate, the base is provided with a first cantilever and a second cantilever, the free end of the first cantilever and the free end of the second cantilever are respectively provided with a first shaft hole and a second shaft hole, the first part is embedded in the first shaft hole of the first cantilever in the first through hole, and the second part is embedded in the second shaft hole of the second cantilever in the second through hole.

[0015] Further, the observation window comprises an inner frame and an outer frame arranged in sequence from inside to outside, an installation space is formed between the inner frame and the outer frame, the reinforcing plate is arranged in the installation space, and the first cantilever and the second cantilever are embedded in the installation space through the inner frame.

[0016] The application also provides a washing machine with the installation structure of the observation window provided by the above technical solution.

[0017] After adopting the above technical solution, the application has the following beneficial effects compared with the prior art.

[0018] When the user uses a larger downward pressure on the opened observation window, the downward pressure provides a forward and downward moving force to the observation window, the forward force makes the observation window tilt forward, and the downward moving force makes the observation window sink, the observation window tilting forward changes the relative position of the hinge shaft, which can make the hinge shaft move from the installation space into the buffer space when the position changes, avoiding the observation window from falling off the machine body.

[0019] The specific embodiments of the present application are described in further detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are part of the present application, serve to further understand the present application, the illustrative embodiments of the present application and the description thereof serve to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the drawings described below are only some embodiments, and other drawings can be obtained from these drawings by those of ordinary skill in the art without creative labor.

[0021] Figure 1 The structural schematic diagram of the washing machine provided for the embodiments of the present application is shown in the figure;

[0022] Figure 2 The structural schematic diagram of the observation window provided for the embodiments of the present application is shown in the figure;

[0023] Figure 3 The structural schematic diagram of the observation window provided for the embodiments of the present application is shown in the figure; Figure 2 The enlarged view at A is shown in the figure;

[0024] Figure 4 The enlarged view of the observation window provided for the embodiments of the present application is shown in the figure;

[0025] Figure 5 The structural schematic diagram of the reinforcing plate provided for the embodiments of the present application is shown in the figure;

[0026] Figure 6 The structural schematic diagram of the shaft sleeve provided for the embodiments of the present application is shown in the figure;

[0027] Figure 7 The structural schematic diagram of the base provided for the embodiments of the present application is shown in the figure.

[0028] In the figure: 1 - outer shell; 11 - front panel; 12 - clothes throwing opening; 2 - observation window; 21 - inner frame; 22 - middle frame; 23 - opening; 3 - hinge; 31 - hinge shaft; 311 - first part; 312 - second part; 32 - base; 321 - first cantilever; 322 - second cantilever; 323 - first shaft hole; 324 - second shaft hole; 4 - positioning groove; 41 - first groove wall; 5 - auxiliary positioning groove; 51 - second groove wall; 6 - shaft sleeve; 61 - perforation; 62 - first positioning protrusion; 7 - reinforcing plate; 71 - first through hole; 72 - second through hole.

[0029] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Example

[0034] like Figures 1-4 As shown, the present invention provides an installation structure for an observation window, including a front panel 11 with a clothing inlet 12, an observation window 2 located at the clothing inlet 12, and a hinge. The hinge 3 has a hinge shaft 31 for hinged connection between the observation window 2 and the front panel 11. The observation window 2 has an installation area for mounting the hinge shaft 31. The installation area has a spaced installation space and a buffer space. The hinge shaft 31 moves back and forth between the installation space and the buffer space under the action of an external force.

[0035] In an embodiment of the present invention, when the user applies a large downward pressure to the opened observation window 2, the observation window 2 will tilt forward, causing the relative position of the hinge axis 31 to change, so that the hinge axis 31 can move from the installation space to the buffer space, thus preventing the observation window 2 from falling off the body.

[0036] The installation area is provided with a positioning groove 4 and an auxiliary positioning groove 5, the positioning groove 4 forms an installation space inside, the auxiliary positioning groove 5 forms a buffer space inside, the positioning groove 4 is arranged on the observation window 2, the hinge shaft 31 is embedded in the positioning groove 4, the outer periphery of the positioning groove 4 is provided with the auxiliary positioning groove 5, and the hinge shaft 31 is selectively embedded in the positioning groove 4 and the auxiliary positioning groove 5.

[0037] When a user uses a large downward pressure on the opened observation window 2, the downward pressure provides a forward and downward moving force for the observation window 2, the forward force makes the observation window 2 tilt forward, and the downward moving force makes the observation window 2 sink, the observation window 2 tilts forward, the relative position of the hinge shaft 31 changes, the hinge shaft 31 is equivalent to move from front to back, and since the outer periphery of the positioning groove 4 is provided with the auxiliary positioning groove 5, the hinge shaft 31 can jump from the positioning groove 4 to the auxiliary positioning groove 5 when the position changes, so that the observation window 2 is prevented from falling off the machine body;

[0038] The hinge shaft 31 is embedded in the auxiliary groove, and the user can obviously feel that the observation window 2 falls off, so that the user feels that the observation window 2 sinks, and the user is reminded that the force pressed on the observation window 2 is too large, so as to reduce the pressure on the observation window 2.

[0039] When the observation window 2 needs to be reset, the user can lift the observation window 2 upward, so that the hinge shaft 31 returns from the auxiliary positioning groove 5 to the positioning groove 4, and the normal opening and closing of the observation window 2 is realized; the installation structure of the observation window can be used for a washing machine, and the washing machine can be a drum washing machine.

[0040] In the embodiment of the application, the positioning groove 4 and the auxiliary positioning groove 5 extend along the axial direction of the hinge shaft 31, and the positioning groove 4 and the auxiliary positioning groove 5 have overlapping parts in the extension direction.

[0041] In the embodiment of the application, the hinge shaft 31 can be embedded in the positioning groove 4 and the auxiliary positioning groove 5, in order to increase the positioning strength of the positioning groove 4 and the auxiliary positioning groove 5 on the hinge shaft 31, the positioning groove 4 and the auxiliary positioning groove 5 extend along the axial direction of the hinge shaft 31, and the positioning groove 4 and the auxiliary positioning groove 5 are respectively arranged on the inner side of the observation window 2, and the two ends of the extension direction of the positioning groove 4 and the auxiliary positioning groove 5 are open;

[0042] In order to realize the jump of the hinge shaft 31 from the positioning groove 4 to the auxiliary groove, the positioning groove 4 and the auxiliary positioning groove 5 have overlapping parts in the extension direction, which can be that the upper end of the extension direction of the auxiliary positioning groove 5 is above the lower end of the extension direction of the positioning groove 4, or the upper end of the extension direction of the positioning groove 4 is above the lower end of the extension direction of the auxiliary positioning groove 5;

[0043] As Figure 4As shown, preferably, one end of the extension direction of the auxiliary positioning groove 5 extends upward to the same level as one end of the extension direction of the positioning groove 4, and the other end of the extension direction of the auxiliary positioning groove 5 extends downward to the same level as the other end of the extension direction of the positioning groove 4, that is, the positioning groove 4 and the auxiliary positioning groove 5 can completely coincide in the extension direction, so as to realize that the positioning strength of the positioning groove 4 on the hinge shaft 31 is equal to the positioning strength of the auxiliary positioning groove 5 on the hinge shaft 31; the observation window 2 is circular as a whole, the distance from the auxiliary positioning groove 5 to the center of the observation window 2 is less than the distance from the positioning groove 4 to the center of the observation window 2, and the auxiliary positioning groove 5 is located on the outer circumferential side of the positioning groove 4.

[0044] As shown in the drawings, Figure 4 In the embodiment of the present application, one groove wall of the extension direction of the positioning groove 4 is inclined to the auxiliary positioning groove 5, and one groove wall of the extension direction of the auxiliary positioning groove 5 is inclined to the positioning groove 4, and the two groove walls are adjacently arranged and smoothly transitioned.

[0045] In the embodiment of the present application, the one groove wall of the extension direction of the positioning groove 4 inclined to the auxiliary positioning groove 5 is a first groove wall 41, and the one groove wall of the extension direction of the auxiliary positioning groove 5 inclined to the positioning groove 4 is a second groove wall 51. In the process of the hinge shaft 31 jumping from the positioning groove 4 to the auxiliary positioning groove 5, the hinge shaft 31 can enter the auxiliary positioning groove 5 along the first groove wall 41, pass through the transition place of the first groove wall 41 and the second groove wall 51, and then enter the auxiliary positioning groove 5 along the second groove wall 51. The first groove wall 41 inclined to the auxiliary positioning groove 5 can buffer the hinge shaft 31 in the process of the hinge shaft 31 jumping from the positioning groove 4 to the auxiliary positioning groove 5, so that the hinge shaft 31 gradually jumps and gradually approaches the auxiliary positioning groove 5, and the hinge shaft 31 jumps more stably. On the other hand, the first groove wall 41 can speed up the jump of the hinge shaft 31 in the process of the hinge shaft 31 jumping from the auxiliary positioning groove 5 to the positioning groove 4, so that the hinge shaft 31 jumps faster. Similarly, the second groove wall 51 inclined to the positioning groove 4 also has the same effect.

[0046] As shown in the drawings, Figure 3 and Figure 6 In the embodiment of the present application, the hinge 3 comprises a sleeve 6 extending along the axial direction of the hinge shaft 31, the sleeve 6 is provided with a through hole 61 in the extension direction, the hinge shaft 31 is embedded in the sleeve 6 through the through hole 61, and the sleeve 6 is selectively embedded in the positioning groove 4 and the auxiliary positioning groove 5.

[0047] In the embodiment of the present application, the outer shaft wall of the hinge shaft 31 is sleeved with the sleeve 6, the sleeve 6 can have a positioning effect on the hinge shaft 31, can stabilize the sleeve 6, and can increase the structural strength of the hinge shaft 31.

[0048] The shaft sleeve 6 extends along the axial direction of the hinge shaft 31, increases the area wrapped around the hinge shaft 31, the hinge shaft 31 is embedded in the shaft sleeve 6 through the hole 61, a plurality of openings are arranged on the outer shaft wall of the shaft sleeve 6, each opening is communicated with the hole 61, the plurality of openings are distributed on the same side of the shaft sleeve 6 along the axial direction of the hinge shaft 31, the openings expose the hinge shaft 31 embedded in the shaft sleeve 6, and the plurality of openings can reduce the weight of the shaft sleeve 6;

[0049] The two ends of the shaft sleeve 6 in the extension direction extend beyond the two ends of the positioning groove 4 in the extension direction, and the two ends of the hinge shaft 31 in the extension direction extend beyond the two ends of the shaft sleeve 6 in the extension direction; the hinge shaft 31 extends outward relative to the shaft sleeve 6 and the positioning groove 4 to provide space for hinging with the cantilever on the base 32;

[0050] The side of the shaft sleeve 6 located at the groove bottom of the positioning groove 4 is provided with two first positioning protrusions 62 which have the same protruding direction, the two first positioning protrusions 62 are arranged at intervals, the two first positioning protrusions 62 are arranged outside the positioning groove 4, the groove bottom of the positioning groove 4 is clamped between the two first positioning protrusions 62, one first positioning protrusion 62 abuts one end of the positioning groove 4, and the other first positioning protrusion 62 abuts the other end of the positioning groove 4; specifically, one first positioning protrusion 62 is arranged on one end of the shaft sleeve 6, and the other first positioning protrusion 62 is arranged on the other end of the shaft sleeve 6.

[0051] The side of the shaft sleeve 6 opposite to the first positioning protrusion 62 is provided with two second positioning protrusions which have the same protruding direction, the two second positioning protrusions are arranged at intervals, the second positioning protrusions are arranged on the same side as the openings, the second positioning protrusions are arranged in the positioning groove 4, there is a spacing between one end of the shaft sleeve 6 and one second positioning protrusion, and there is a spacing between the other end of the shaft sleeve 6 and the other second positioning protrusion, the two second positioning protrusions are used for positioning connection with other components to improve the stability of the shaft sleeve 6.

[0052] As shown in Figure 3 and Figure 4 In the embodiment of the application, the opening 23 is arranged on the observation window 2 opposite to the clothes throwing opening 12, the outer periphery of the opening 23 is provided with the reinforcing plate 7, the reinforcing plate 7 is stamped to form the positioning groove 4 and the auxiliary positioning groove 5, and the side of the observation window 2 opposite to the reinforcing plate 7 is arranged at a spacing from the reinforcing plate 7.

[0053] In the embodiment of the application, the observation window 2 comprises an inner frame 21, a middle frame 22, an outer frame and a window screen which are arranged in sequence from inside to outside, the middle part of the inner frame 21, the middle frame 22 and the outer frame are all provided with the opening 23, the opening 23 is provided with a glass cover, further, the outer periphery of the opening 23 of the middle frame 22 is provided with the reinforcing plate 7, the reinforcing plate 7 can increase the structural strength of the observation window 2; the positioning groove 4 and the auxiliary positioning groove 5 are stamped from the reinforcing plate 7, and stress concentration can be reduced; the reinforcing plate 7 extends from the outer periphery of the opening 23 to the outer edge of the middle frame 22.

[0054] As shown in Figure 5 The side of the observation window 2 opposite to the reinforcing plate 7 is arranged with a spacing from the reinforcing plate 7, and the spacing between the reinforcing plate 7 and the observation window 2 provides a space for the cantilever hinge on the base 32.

[0055] As shown in Figure 3 and Figure 4 In the embodiment of the present application, the parts of the hinge shaft 31 beyond the shaft sleeve 6 at both ends are the first part 311 and the second part 312, and the reinforcing plate 7 is provided with the first through hole 71 and the second through hole 72 for exposing the first part 311 and the second part 312 respectively, and the extension length of each through hole is greater than or equal to the sum of the width of the positioning groove 4 and the width of the auxiliary positioning groove 5.

[0056] In the embodiment of the present application, the reinforcing plate 7 is provided with the first through hole 71 corresponding to the first part 311 and the second through hole 72 corresponding to the second part 312, the first part 311 is located in the first through hole 71, and the second part 312 is located in the second through hole 72, and the first through hole 71 and the second through hole 72 provide accommodation space for the cantilever on the base 32.

[0057] In order to make the hinge shaft 31 transition back and forth between the positioning groove 4 and the auxiliary positioning groove 5, therefore, the extension length of each through hole is greater than or equal to the sum of the width of the positioning groove 4 and the width of the auxiliary positioning groove 5, so as to avoid the reinforcing plate 7 blocking the transition of the hinge shaft 31.

[0058] As shown in Figure 7 In the embodiment of the present application, the hinge 3 further comprises a base 32 arranged on the front side plate, the base 32 is provided with a first cantilever 321 and a second cantilever 322, the free end of the first cantilever 321 and the free end of the second cantilever 322 are respectively provided with a first shaft hole 323 and a second shaft hole 324, the first part 311 is embedded in the first shaft hole 323 of the first cantilever 321 located in the first through hole 71, and the second part 312 is embedded in the second shaft hole 324 of the second cantilever 322 located in the second through hole 72.

[0059] In the embodiment of the present application, the base 32 is provided with a plurality of mounting holes, and the front panel 11 is provided with a plurality of fixing holes corresponding to the mounting holes, and the fasteners pass through the mounting holes and the corresponding fixing holes respectively to fixedly connect the base 32 and the front panel 11.

[0060] The cantilever is L-shaped, each cantilever comprising a first section and a second section, the first section being connected to the base 32 via the second section, the free end of the first section being provided with a cylindrical protrusion, the axis of the protrusion being provided with an axial hole, the protrusion on the first cantilever 321 being located in the first through hole 71, the protrusion on the second cantilever being located in the second through hole 72, the first section 311 being embedded in the first axial hole 323, relative rotation being generated between the first section 311 and the first axial hole 323, the second section 312 being embedded in the second axial hole 324, relative rotation being generated between the second section 312 and the second axial hole 324;

[0061] During installation, the hinge shaft 31 is first embedded in the shaft sleeve 6 via the through hole 61, then the first section 311 is embedded in the first axial hole 323, the second section 312 is embedded in the second axial hole 324, finally the shaft sleeve 6 is embedded in the positioning groove 4, the first cantilever 321 is placed in the first through hole 71, and the second cantilever 322 is placed in the second through hole 72.

[0062] As shown in Figure 1 and Figure 7 In the embodiment of the present application, the observation window 2 comprises an inner frame 21 and an outer frame arranged in sequence from inside to outside, the inner frame 21 and the outer frame form a mounting space, the reinforcing plate 7 is arranged in the mounting space, and the first cantilever 321 and the second cantilever 322 are embedded in the mounting space via the inner frame 21.

[0063] In the embodiment of the present application, the outer frame comprises a middle frame 22 and an outer frame arranged outside the middle frame 22, the reinforcing plate 7 is arranged between the inner frame 21 and the middle frame 22, the reinforcing plate 7 can be fixedly connected with the inner frame 21 or the middle frame 22, the inner frame 21 is provided with a first opening hole and a second opening hole at positions corresponding to the first through hole 71 and the second through hole 72 respectively, the first cantilever 321 enters the first through hole 71 via the first opening hole, and the second cantilever 322 enters the second through hole 72 via the second opening hole.

[0064] The above description is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above-mentioned technical content without departing from the technical solution of the present application, and any simple modification, equivalent change and modification of the above-mentioned embodiment based on the technical essence of the present application are still within the scope of the present application.

Claims

1. A mounting structure for an observation window, comprising a front panel with a clothing inlet, an observation window disposed at the clothing inlet, and a hinge, the hinge having a hinge axis for hinged connection between the observation window and the front panel, characterized in that, The observation window has a mounting area for installing the hinge shaft. The mounting area has a spaced mounting space and a buffer space. The hinge shaft moves back and forth between the mounting space and the buffer space under the action of external force. The installation area includes a positioning slot and an auxiliary positioning slot. The positioning slot forms an installation space, and the auxiliary positioning slot forms a buffer space. The auxiliary positioning slot is located on the outer periphery of the positioning slot. One of the hinge shafts is embedded in the positioning slot and the auxiliary positioning slot. The positioning groove and the auxiliary positioning groove extend along the axial direction of the hinge axis, and the positioning groove and the auxiliary positioning groove have overlapping portions in the extension direction; One wall of the positioning groove extends towards the auxiliary positioning groove, and one wall of the auxiliary positioning groove extends towards the positioning groove. The two walls are adjacent to each other and have a smooth transition.

2. The installation structure of the observation window according to claim 1, characterized in that, One end of the auxiliary positioning groove extends upward to be flush with the other end of the positioning groove, and the other end of the auxiliary positioning groove extends downward to be flush with the other end of the positioning groove.

3. The installation structure of the observation window according to claim 1 or 2, characterized in that, The hinge includes a bushing extending axially along the hinge axis. The bushing has a through hole in the direction of extension. The hinge axis is inserted into the bushing through the through hole. The bushing is selectively inserted into a positioning groove and an auxiliary positioning groove.

4. The installation structure of the observation window according to claim 3, characterized in that, The observation window has an opening opposite the clothing loading port. A reinforcing plate is provided around the outer perimeter of the opening. The reinforcing plate is stamped to form a positioning groove and an auxiliary positioning groove. The observation window is positioned with a gap between it and the reinforcing plate on the side opposite to the reinforcing plate.

5. The installation structure of the observation window according to claim 4, characterized in that, The portions of the hinge shaft that extend beyond the positioning groove at both ends are the first part and the second part, respectively. The reinforcing plate is provided with a first through hole and a second through hole that expose the first part and the second part, respectively. The extension length of each through hole is greater than or equal to the sum of the width of the positioning groove and the width of the auxiliary positioning groove.

6. The installation structure of the observation window according to claim 5, characterized in that, The hinge also includes a base on the front side plate, on which a first cantilever and a second cantilever are provided. The free ends of the first cantilever and the second cantilever are respectively provided with a first shaft hole and a second shaft hole. The first part is embedded in the first shaft hole of the first cantilever located in the first through hole, and the second part is embedded in the second shaft hole of the second cantilever located in the second through hole.

7. A washing machine, characterized in that, An installation structure having the observation window as described in any one of claims 1-6.

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