CN1213190C - Electric washing machine - Google Patents

Abstract

The present invention relates to a electic washing machine which comprising a columnar washing tube opened on the top with a bottom, an upper face plate above the washing tube which has an inlet for taking out/puting in the washings, the front edge of the inlet has a arc shape along the upper edge of the washing tube, a storage chamber on the upper face plate for installing electric element, the storage chamber is arranged in front of the inlet with a shape extending backward on the left and right sides of the upper face plate.

Description

electric washing machine

technical field

The invention relates to a washing machine.

Background technique

The washing machine has, for example, a washing tub for washing in its cabinet. The washing bucket is cylindrical and has an opening on its upper part. On the upper center of the casing directly above the opening, there is an insertion opening for putting laundry into or taking out from the washing tub, and a loam cake that can be opened and closed freely to cover the insertion opening is also provided. On the top of the cabinet in front of the inlet, there is formed a recessed storage room for placing electrical components, and an operation panel for operating the washing machine is provided in the storage room.

The insertion port is generally an oblong shape extending left and right when viewed from the front, and the front and rear edges of the insertion port are basically straight lines extending to the left and right, and the linear front edge passes through the inner side of the upper opening of the washing tub.

The operation panel is composed of a circuit board including operation switches and display elements arranged in the above-mentioned installation chamber and a cover covering the circuit board. The operating panel is arranged between the linear front end edge of the above-mentioned delivery opening and the front end edge on the casing, and is roughly rectangular in the left-right direction when viewed from the front.

The rear end edge of the loam cake is connected with the top of the casing with a hinged opening and closing device. The loam cake can be made of one board, or a pair of board-shaped doors foldably connected together. The adjoining edges of a pair of plate-shaped doors on the latter upper cover are connected to each other by a folding connecting device.

In addition, a detection switch for detecting the open and closed state of the upper cover is also provided. This detection switch doubles as the detection switch of the abnormal vibration of the washing tub during detection operation usually, and is arranged on the upper rear corner in the casing near the washing tub. The detection switch is operated through the operating piece located at the rear of the upper cover to switch the circuit on and off. For example, when the upper cover is opened, the circuit of the detection switch is turned on, and when the upper cover is closed, the circuit of the detection switch is turned off. Like this, just can make the operation of the washing machine such as the spin-drying operation that washing tub rotates at a high speed stop by the opening and closing state of upper cover.

However, the front edge of the above-mentioned insertion port is linear, which makes the insertion port look very small. Even if the user does not actually feel any inconvenience for the insertion port when putting in or taking out the laundry, there is still a problem. A feeling of difficulty putting laundry in or out.

In particular, the front end edge of the delivery port will pass through the inboard of the upper opening of the washing bucket, so sometimes the laundry to be taken out will hang on the front end edge of the delivery opening, which is inconvenient.

On the other hand, in order to facilitate the loading and unloading of the laundry, the loading port can be enlarged, but this will cause the following problems. That is to say, once the feeding port is widened, since the operating panel has to be set forward, the shape of the washing machine has to be enlarged, which is not ideal. If the washing machine is only enlarged without enlarging the outer shape of the washing machine, the storage room in front of the insertion opening will be reduced, so it is difficult to secure a sufficient space for installing electrical components. As a result, for example, the number of electrical components such as buttons and display components that can be installed in the installation chamber is reduced, and the degree of freedom of layout is reduced, making operation of the operation panel difficult. If many electrical components are installed in a narrow space, the installation of electrical components is very difficult.

There are also the following problems with regard to the foldable top cover. Specifically, if the upper cover is closed in the folded state, the front half of the insertion port is in a half-open state. In this half-open state, the operating piece of the upper cover may cause the detection switch to misoperate, switching the state of disconnecting the circuit to the state of allowing power on. In this case, the washing machine is in a workable state, for example, the washing tub may rotate at a high speed for spin-drying. But staff can stretch in the washing tub that rotates from the gap of the delivery port of above-mentioned half-open state. Therefore, the structure that cannot prevent the misoperation of the above-mentioned detection switch is dangerous for the user.

In order to prevent misoperation of the detection switch, it is also considered to avoid increasing the cost of the washing machine.

There are also the following problems with regard to the foldable upper cover. Specifically, when the upper cover is folded, a pair of door-shaped parts will collide with each other, producing a collision sound.

Contents of the invention

Therefore, the purpose of the present invention is to provide a kind of washing machine that can solve the above-mentioned technical problems, has the insertion port that can take out and put in the laundry conveniently, and can ensure that the installation chamber in front of it has enough space required for installing electrical components. .

The object of the present invention is also to provide a washing machine that can solve the above technical problems, has a simple structure, and can reliably stop running when the foldable top cover is in a half-open state.

The object of the present invention is also to provide a washing machine that can solve the above technical problems, has a simple structure, and can prevent the colliding sound when the foldable top cover is folded.

The invention provides an electric washing machine, which has a bottomed cylindrical washing tub with an open upper part, and an upper panel arranged above the washing tub and formed with an inlet for taking out laundry and putting it into the washing tub. The front edge of the mouth is arc-shaped along the upper edge of the washing bucket, and there is a room for placing electrical components on the upper panel. With the front left and right sides.

According to the present invention, since the front edge of the insertion port is arc-shaped along the upper edge of the washing tub, compared with the linear shape, the insertion port looks larger, and it is more convenient to take out and put in laundry from the washing tub through the insertion port.

In addition, you can better check the inside of the washing tub through the opening.

Especially when the circular arc shape of the insertion port is slightly larger than the upper edge of the washing tub, when the laundry is taken out from the washing tub, the laundry will not be caught by the insertion port, and it is more convenient to pick and place the laundry.

In addition, since the placement chamber extends from the front of the insertion port to the left and right sides of the front, it is possible to secure a sufficient space for placing electrical components. The reason for saying this is that the front edge of the arc-shaped opening cuts into the placement chamber. In front of the placement opening, the front and rear width of the placement chamber is narrow, and on the left and right sides of the front of the placement opening, the placement chamber can be moved towards the rear. expand. Therefore, the installation of electrical components is relatively convenient, and the manufacturing cost of the washing machine can be reduced.

In the electric washing machine of the present invention, the edge of the inlet, at least the front edge, has a wall surface that slopes downward toward the inside of the washing tub.

According to the present invention, because of the insertion opening with a downwardly inclined wall surface, the upper part of the front edge expands to the outside of the insertion opening than the lower part, so it looks larger, and as a result, it is more convenient to take and put the laundry.

In the electric washing machine of the present invention, a circuit board divided into two is placed in the above-mentioned placement chamber, and a cover plate is installed on the placement chamber.

According to the present invention, since the circuit board is divided into two, the shape of the circuit board to be placed in the housing chamber with a narrow front and rear width at the central part in the left-right direction is formed by combining the two-divided circuit boards. Circuit board sections are made into complex or difficult shapes, with the result that the sections are easy to manufacture.

In the electric washing machine of the present invention, one of the circuit boards divided into two is a power supply circuit board, and electrical components with a higher height are arranged on the power supply circuit board, and the other one of the circuit boards divided into two is used for operating switches. On the circuit board for the operation switch, switch elements and display elements with lower heights are arranged, and the first fixing column for fixing the power circuit board and the second fixing column for fixing the circuit board for the operation switch are respectively arranged on the left and right , the first fixed column is longer than the second fixed column.

According to the present invention, the power supply circuit board and the operation switch circuit board can be respectively fixed at appropriate heights by the first and second fixing columns. For example, the circuit board for the operation switch can be fixed at a certain height according to the display element or the switch element, and the high-height electrical components can be reasonably arranged on the power circuit board. As a result, it is possible to use relatively high-height electrical components that cannot be arranged on a circuit board with display components, etc., and are relatively low in price, thereby reducing costs.

The electric washing machine of the present invention has an upper cover covering the insertion port of the upper panel, the upper cover has a rear cover whose rear edge is rotatably connected to the rear of the upper panel, and a front cover which is rotatably connected to the front edge of the rear cover. When the cover is closed, the bottom of the back cover and the front cover are placed side by side on the upper panel. When it is opened, the back cover and the bottom of the front cover face each other. When the two are folded, the front edge of the front cover forms an arc shape. Coinciding with the arc-shaped front edge of the feeding port, there is a cover switch in the rear corner of the upper panel that is operated by the operating piece set at the rear of the rear cover and switches the opening and closing of the circuit according to the condition of the upper cover when it is closed. Closed detection switch, when the upper cover is folded and closed, the operating piece of the rear cover does not switch the detection switch, and a protrusion is provided at a certain position on the upper panel to prevent the rear cover from continuing to rotate towards the closing direction by abutting against the folded front cover .

According to the present invention, when the folded upper cover is closed, the front cover and the rear cover maintain the folded state, and the rear cover rotates towards the closing direction. Along with such rotation, the front cover contacts with the protrusion, which stops the rotation of the back cover, so the operating piece of the back cover cannot operate the detection switch. As a result, erroneous switching of the detection switch can be prevented, resulting in a washing machine that is safer for the user.

The upper cover of the front cover with the arc-shaped front edge can reliably cover the insertion port, and is opened above the placement chamber. As a result, in the case where the operation switch substrate is installed in the installation chamber, the operation of the switch element is more convenient, and the observation of the display element is also easy.

In the case where the front edge of the front cover is made into a circular arc shape, if there is no above-mentioned protrusion, then as mentioned above, the rear cover will easily cause the wrong switch of the detection switch, but since the above-mentioned protrusion is provided, the rear cover can be prevented reliably. Misswitching of the detection switch.

The present invention relates to a bottomed cylindrical washing tub with an open upper part, which is arranged above the washing tub and forms an upper panel for taking out laundry and putting it into the washing tub, and an upper panel covering the inlet. For an electric washing machine with a cover, the above-mentioned upper cover has a rear cover whose rear edge is rotatably connected to the rear of the upper panel, and a front cover which is rotatably connected to the front edge of the rear cover. They are placed side by side on the upper panel. When opened, the back cover and the front cover are facing each other, and the two are folded. There is an operation piece in the rear corner of the upper panel, which can be operated according to the When the upper cover is closed, the detection switch for opening and closing the cover of the switching circuit is opened and closed. When the upper cover is folded and closed, the operation piece of the rear cover does not switch the detection switch. There is a pass and fold switch at a certain position on the upper panel. The front cover abuts against the protrusion that prevents the rear cover from continuing to rotate towards the closing direction.

According to the present invention, along with the closing of the folded upper cover, the front cover contacts the protrusion and prevents the rotation of the rear cover, so the operating piece of the rear cover cannot operate the detection switch. As a result, erroneous switching of the detection switch can be prevented, resulting in a washing machine that is safer for the user.

According to the electric washing machine of the present invention, the protrusion is provided on the upper panel on the side of the inlet, on the side where the detection switch is provided when viewed from the left and right.

According to the present invention, since the protrusion prevents the rotation of the back cover in the vicinity of the detection switch, it is possible to reliably prevent the detection switch from being switched by mistake.

According to the electric washing machine of the present invention, the above-mentioned protrusions are respectively provided one on the left and one on the upper panel located on the left and right sides of the inlet.

According to the present invention, because the protrusions are located on the left and right sides, even if one of the protrusions slips and does not abut against the front cover, the other protrusion abuts against the front cover, so the rotation of the back cover can be reliably prevented.

According to the electric washing machine of the present invention, the left and right protrusions are displaced in the front-rear direction.

According to the present invention, if one protrusion arranged at the front slips and does not abut against the front cover, the other protrusion arranged at the rear can reliably abut against the front cover, so the rotation of the rear cover can be prevented more reliably.

According to the electric washing machine of the present invention, the upper cover is provided with a stopper that limits the folding angle of the back cover and the front cover when they are folded, so that when the folded upper cover is closed, the folded front cover can reliably abut against the protrusion. .

According to the present invention, when folding, the rear cover and the front cover are not completely overlapped, but only folded to a certain angle. In this way, it can be ensured that when the upper cover is folded and then the rear cover is turned, the front cover and the protrusions will abut against each other reliably, and when the front cover and the protrusions are abutted, the stopper and the protrusions can cooperate together to reliably prevent the rotation of the rear cover . As a result, erroneous switching of the back cover to the detection switch can be more reliably prevented.

According to the electric washing machine of the present invention, the above-mentioned stopper is provided in association with the rotating shaft connecting the rear cover and the front cover.

According to the present invention, since the stopper can limit the folding angle near the center of rotation, it will not be opened wide.

The invention provides a top cover on the washing machine to cover the opening for loading and unloading laundry from the washing tub, the top cover has a rear cover whose rear edge is rotatably connected to the back of the upper panel, and a The front cover connected to the front edge of the back cover and provided with a handle for opening and closing. When it is closed, the back cover and the bottom of the front cover are placed side by side on the upper panel. When it is opened, the back cover and the bottom of the front cover face each other. , the washing machine with the two folded, the above-mentioned upper cover is provided with a stopper that limits the folding angle of the back cover and the front cover when they are folded, so that there is a gap between the back cover and the front cover.

According to the present invention, since the rear cover does not collide with the underside of the front cover when it is folded, it can be closed quietly without generating a collision sound. Also, because the handle can be easily grasped when folded, the operation of the top cover is very convenient.

Description of drawings

Hereinafter, an electric washing machine (hereinafter referred to as a washing machine) according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a right side partial sectional view showing an upper half of a washing machine according to an embodiment of the present invention.

Fig. 2 is a top view of the washing machine shown in Fig. 1, showing the front part with the upper cover removed.

Fig. 3 is a front cross-sectional view of the operation panel of the washing machine shown in Fig. 1, showing a cross-section taken along line A-A of Fig. 1 .

Fig. 4 is a partial cross-sectional view of the right side of the upper cover of the washing machine shown in Fig. 1, showing a folded and unfolded state.

Fig. 5 is a top view of the washing machine shown in Fig. 1, showing a closed state of the upper cover,

Fig. 6 is a perspective view of the folding connection device.

Fig. 7 is an enlarged view of part B of Fig. 4, showing the opened state.

Fig. 8 is an enlarged view of part B of Fig. 4, showing a folded state.

Fig. 9 (a) shows the situation of existing loam cake and top panel, and Fig. 9 (b) shows the situation of not being provided with the loam cake of present embodiment and the upper panel of protrusion, and Fig. 9 (c) shows that present embodiment is set The case with the upper cover and raised upper panel.

Fig. 10 is a right side view illustrating the action of the upper cover shown in Fig. 1, showing the state where the front cover is engaged with the left protrusion.

Fig. 11 is a right side view illustrating the operation of the upper cover following Fig. 10, showing a state in which the front cover is over the left side protrusion.

Detailed ways

Washing machine 1 has the box-shaped casing 2 that forms its external shape, and in the inside of casing, is provided with the washing tub 3 that washes and spins dry usefulness, and not shown in the figure supplies water to washing tub 3, uses from washing tub 3 drains. valves and pipes etc. The washing tub 3 is a bottomed cylindrical washing and dehydrating tub with an axis extending up and down and an open upper part. It has an outer tub 4 suspended in the casing 2 and an inner tub 5 rotatably supported coaxially with the outer tub 4. . The bottom of the inner tub 5 is provided with a motor-driven stirring wing not shown in the figure. When washing, only the agitating wing rotates, and the agitating wing rotates together with the inner barrel 5 at a high speed when drying.

Formed on the upper panel 11 of the casing 2 is an insertion port 6 for taking and placing laundry from the washing tub 3, an upper cover 7 covering the insertion port 6, and an operation panel for operating the washing machine 1 in front of the insertion port 6. plate 8.

The user operates the washing machine 1 from the front. In the following description, front, rear, left, and right are based on the state seen from the front, and arrows indicating directions are indicated in each drawing as necessary.

In this embodiment, the insertion port 6 adopts a shape that is convenient for taking and placing laundry, and the operation panel 8 and the upper cover 7 adopt shapes that can adapt to the insertion port 6 .

Detailed description will be given below.

As shown in the top view of FIG. 2 , the insertion port 6 is substantially D-shaped in the left-right direction when viewed from above. The feeding port 6 is arranged above the upper opening 10 of the inner tub 5 of the washing tub 3 .

The upper part of the insertion port 6 is larger than the lower part (referring to Fig. 1). The lower end portion of the insertion port 6 is the narrowest, and the planar shape of the lower end portion is the above-mentioned substantially D-shape.

The peripheral edge portion 31 forming the injection opening 6 is composed of a pair of side edge portions 33, 33 on the left and right sides, a front edge 32 on the front side, and a rear edge 34 on the rear side when viewed from above.

The peripheral edge portion 31 of the insertion opening 6 has a first wall surface 35 forming the top of the insertion opening 6 through the front edge 32 to the side edge portion 33 of the right side from the side edge portion 33 on the left side thereof, and the first wall surface and the first wall surface. 35 are connected to each other to form the second wall surface 36 at the bottom of the insertion port 6 . The first wall surface 35 slopes downward toward the inside of the washing tub 3 . The first wall surface 35 is composed of a plurality of smooth and continuous conical surfaces extending from the left side edge portion 33 through the front edge 32 to the right side edge portion 33 , forming a cup shape. The second wall surface 36 is composed of a plurality of circumferential surfaces extending up and down along the axes, and the side edge portions 33 along the left and right sides are smoothly and continuously connected with the front edge 32 .

Both the first wall surface 35 and the second wall surface 36 of the front edge 32 are arc-shaped, for example elliptical, constituting a part of a long ellipse long in the left-right direction when viewed from above.

The second wall surface 36 of the side edge portion 33 is also arc-shaped, such as an ellipse, constituting a part of a long ellipse long in the left-right direction when viewed from above. The first wall surface 35 of the side edge portion 33 has a concave curved surface smoothly connected to the first wall surface 35 of the front edge 32 and the rear edge 34 .

In addition to the ellipse, the so-called circular arc shape here may also be a shape formed by connecting multiple circular arcs with different curvature radii, or a shape formed by circular arcs with the same curvature radius. In short, any shape may be used as long as it has a constant radius of curvature and the center of curvature is inside the insertion port 6 .

The rear edge 34 is constituted by a plane extending in the left-right direction and the up-down direction. The rear edge 34 is smoothly and continuously connected to each side edge portion 33 by a concave curved surface.

The upper opening 10 of the inner tub 5, except for the rear portion thereof, is almost entirely disposed inside the lower end portion of the substantially D-shaped inlet 6. As shown in FIG. That is to say, the frontmost part of the lower end of the front edge 32 of the delivery port 6 is more forward than the frontmost part of the upper opening 10 of the inner bucket 5 of the washing bucket 3, on the outside of the upper opening 10, and in the outer bucket of the washing bucket 3. 4 behind the frontmost part of the upper opening 9. The lower end portion of the side edge portion 33 of the insertion port 6 is provided outside the upper opening 10 of the inner tub 5 and the upper opening 9 of the outer tub 4 of the washing tub 3 . Although the rear edge 34 of the delivery opening 6 is arranged at the central part of the left-right direction, on the inside of the upper opening 10 of the inner tub 5 of the washing tub 3, it will not hinder the picking and placing of the laundry and the inside of the washing tub 3 at all. .

As long as the first wall surface 35 of the peripheral portion 31 of the insertion port 6 is at least provided on the front edge 32, the effect of the insertion port 6 looking larger can be obtained by inclining downward.

The casing 2 has the above-mentioned upper panel 11 made of resin that forms a part of the upper surface of the washing machine 1 disposed above the washing tub 3, and is connected to the lower surface of the upper panel 11 to form the front, rear, left, and right casings 12 of the washing machine 1, and forms A bottom structural member (not shown) supporting the bottom surface of the lower end of the housing 12 .

The upper panel 11 has a main body 40 forming a flange portion 41 extending horizontally from the peripheral portion 31 of the insertion port 6 and the upper end of the peripheral portion 31 to the outside of the insertion port 6, a placement chamber 42 positioned in front of the insertion port 6, and The rear chamber 43 formed by the recess behind the insertion port 6 . The main body portion 40 of the upper panel 11 forms a part of the upper surface of the washing machine 1 when the upper cover 7 is opened.

The part behind the rear edge 34 of the rear chamber 43 that constitutes the delivery port 6 is provided with a water supply valve and a water injection opening forming part (not shown in the figure) for water supply, and a detection valve is provided on the left side of the rear corner. A detection switch 13 for opening and closing the upper cover 7 (refer to FIG. 5 ). The detection switch 13 constitutes a part of detection means for detecting abnormal vibration during operation of the washing tub. The upper part of the rear chamber 43 is covered by the cover plate 14 .

The housing chamber 42 is a concave portion open above where the circuit board 15 , electrical components, wires and other electrical components are placed, and is provided with a bank-shaped peripheral portion 44 that surrounds the concave portion and is higher than the flange portion 41 .

The placement chamber 42 is disposed on the front and the left and right sides of the front of the upper panel 11 straddling the front and the front and left and right sides of the insertion port 6 . The accommodation chamber 42 is long in the left-right direction when viewed from above, has a narrow width in the center in the left-right direction (the size in the front-rear direction), and gradually increases in width toward the left and right ends, where the width is the largest. The front edge 54 of the housing chamber 42 extends substantially linearly in the left-right direction along the front edge of the upper panel 11 . And the rear edge 55 of the housing chamber 42 is recessed to the interior of the housing chamber 42, and is concave along the front edge 32 of the delivery port 6. . The rear parts 45 at the left and right ends of the housing chamber 42 are located more rearward than the frontmost part of the front edge 32 of the insertion port 6 .

In the installation chamber 42, as shown in FIG. 3, the circuit board 15 divided into two pieces is placed, and the cover plate 24 is installed on the installation chamber 42. As shown in FIG. The circuit board 15 is housed in the circuit board box 23 and sealed with resin, and is placed in the installation chamber 42 in a watertight manner through a plurality of fixing columns 47 , 48 . The operation panel 8 is constituted by these respective parts.

The circuit board 15 is divided into two, and the current is connected to each other. One of the divided circuit boards is a power supply circuit board 17 and the other is an operation switch circuit board 16 .

The power supply circuit board 17 is arranged with higher electrical components such as transistors 20 on its circuit board 19, and also arranged with integrated circuit components containing microcomputers, electrical components such as large-scale switch components for switching power supply operations (not shown in the figure) ). The circuit board 19 of the power supply circuit board 17 is separated from the cover plate 24 by a certain interval, so that the electrical components with a higher height will not interfere with the cover plate 24 and the switch elements can be operated. The power supply circuit board 17 is arranged on the right part of the placement chamber 42 from the central part, and the right rear side of the power supply circuit board is arranged on the right rear side part 45 of the placement chamber 42, compared with the frontmost part of the front edge 32 of the insertion port 6. lean back.

The circuit board 16 for the operation switch is arranged on its circuit board 18 with switch elements 21 containing push buttons, display elements 22 containing light-emitting diodes and other low-level electrical components, and these electrical components are arranged opposite to the cover plate 24. On the cover plate 24, a resiliently supported operating piece 49 for operating the switching element 21 is arranged from the inside, and a transparent or translucent window 50 corresponding to the display element is also provided. The circuit board 18 of the operating switch circuit board 16 and the cover plate 24 will be separated by a certain interval, so that the switch element 21 can be operated with the operating piece 49 and the display element 22 can be seen clearly through the window 50 . The operation switch circuit board 16 is arranged on the left side of the placement chamber 42, and the left rear portion of the operation switch circuit board 16 is arranged on the left rear side part 45 of the placement chamber 42, which is closer to the frontmost part of the front edge 32 of the insertion port 6. back.

In this way, a part of the circuit board 16 for the operation switch is arranged on the rear part 45 of the housing chamber 42, so it can be ensured that the circuit board 16 for the operation switch can be large enough to ensure its operation and visual recognition. For example, in the case of arranging a plurality of switching elements 21, since there is a large space between adjacent switching elements 21, it is not possible to mistake the switching elements, and the operation is relatively easy and convenient. It is also easy to recognize the shape, size and installation position of the display element 22 . In the case of arranging a plurality of display elements 22, since the number can be increased, the interval can be enlarged, and the layout can be regularized. Therefore, the display is easy to see and identification is very convenient.

The cover plate 24 is substantially in the same shape as the placement chamber 42 when viewed from above, and covers the entire top of the placement chamber 42 . The cover plate 24 has an upper surface forming its upper surface, and a side portion vertically provided from the upper surface, and the side portion is fitted into the peripheral portion 44 of the accommodation chamber 42 to ensure watertightness. Almost all of the upper surface of the cover plate 24 serves as the operation surface of the operation panel 8 . The first and second fixing posts 47 , 48 are arranged vertically downward from the inside (underside) of the upper portion of the cover plate 24 .

A plurality of first fixing posts 47 are provided, for example four, for fixing the power circuit board 17 . A plurality of second fixing columns 48 are provided, for example four, for fixing the circuit board 16 for the operation switch. The circuit board 15 is mounted on the top of each fixing post 47,48. The first fixing column 47 and the second fixing column 48 are provided in the installation chamber 42 at left and right, and have different heights that form a certain interval according to the respective circuit boards corresponding to them. For example, the first fixing post 47 is longer than the second fixing post 48 .

The upper cover 7 has its rear edge 61 rotatably connected to the rear cover 25 constituting the rear portion of the flange portion 41 at the rear of the upper panel 11 through an opening and closing connecting device 27, and is rotatably connected to the rear cover 25 through a folding connecting device 28. The front edge 62 of the front cover 26. The front cover 26 and the rear cover 25 are plate-shaped members made of a resin material. When closing, as shown in Figure 1, the following 65,66 of rear cover 25 and front cover 26 are covered on the upper panel 11 side by side, and upper cover 7 covers delivery port 6 (closed state). As shown in FIG. 4 , when the upper cover 7 is opened, the lower surfaces 65 and 66 of the rear cover 25 and the front cover 26 face each other, and both the rear cover 25 and the front cover 26 can be folded.

Rear cover 25 as shown in Figure 5, is substantially the rectangle that left-right direction is longer, and its size can cover that half of insertion port 6 rears roughly. The rear edge 61 of the rear cover 25 is along the front edge of the rear chamber 43 of the upper part 11, and the front edge 62 of the rear cover 25 is along the rear edge 63 of the front cover 26, both of which are straight lines extending left and right.

The front cover 26 has a size that can roughly cover the half of the front of the insertion port 6, and has a recess 67 in its central portion. When operating the front cover 26, the hand can be put into the recessed part 67, and the upper part of the predetermined recessed part 67, which constitutes the edge part 70 constituting the handle, can be grasped for operation. The front edge 64 of the front cover 26 is almost the same shape as the rear edge of the cover plate 24, for example, it is a convex curved shape protruding forward from the central part in the left-right direction, or a circle along the arc-shaped front edge 32 of the insertion port 6 when closed. Arc shape, or the shape that the left and right ends 78, 79 of the front edge 64 recede backward corresponding to the rear part 45 of the left and right ends of the housing chamber 42, so that when closed, the front cover 26 allows the cover The upper surface of the plate 24 is exposed, and forms a larger gap with the cover plate 24 . As for the size in the front-back direction, the size (L1) of the center portion in the left-right direction of the front cover 26 is almost the same as the size (L2) of the rear cover 25, and is approximately three times the size (L3) of the end portion in the left-right direction of the front cover 26. When the upper cover 7 is closed in the folded state, a part of the front cover 26, such as the central part of the front edge 64, will protrude into the insertion port 6 (see FIGS. 10 and 11).

The opening and closing connection device 27, as shown in FIG. 1, has a rotating shaft 68 extending along the rear edge 61 of the rear cover 25, and a known structure such as a hinge can be used, for example.

By opening and closing the connecting device 27, the rear cover 25 can be in the state shown in Figure 4, at the back of the delivery port 6, relative to the upper panel 11, and as shown in Figure 1, it can fall down along the upper panel 11, covering the delivery State of the second half of mouth 6.

As shown in the perspective view of FIG. 6, the folding link 28 has a cylindrical portion 74 as a hole forming member forming a hole 75 integrated with the front cover 26, and a rotating shaft 72 integrally formed with the front cover. The rotation shaft 72 protrudes from the support portion 71 of the rear cover 25 , extends in the left-right direction, and is rotatably fitted in the hole 75 . The rotation shaft 72 and the hole 75 are provided in multiple sets.

The rear cover 25 has a plurality of the aforementioned support portions 71 . These support portions 71 are formed at the lower end portion of the front edge 62 of the rear cover 25 to protrude forward. The support parts 71 are arranged side by side at a certain interval in the left-right direction, and the cylindrical part 74 of the front cover 26 is provided between them. Between the support portion 71 and the support portion 71, the lower end portion of the front edge 62 of the rear cover 25 extends forward, and at the extended front end, there is provided an abutting rib 76 of the front cover 26 which will be described later. Connection part 73.

The front cover 26 has a plurality of the aforementioned cylindrical portions 74 arranged in accordance with the intervals between the support portions 71 . Each cylindrical portion 74 is reinforced by a rib 76 provided at the lower end portion of the rear edge 63 of the front cover 26 . The rib 76 is connected to the upper portion of the peripheral surface of the cylindrical portion 74 , the front surface of the rear edge 63 , and the lower surface 66 . The reinforcing rib 76 has an end that abuts against the above-mentioned abutting portion 73 .

By folding the connecting device 28, as shown in Figure 4, the front cover 26 and the rear cover 25 can be in a folded state, so that the rear cover 25 is opposite to the bottom 65, 66 of the front cover 26, and as shown in Figure 1, the rear cover 25 and the front cover 26 are juxtaposed, and the undersides 65, 66 of the rear cover 25 and the front cover 26 all face the same direction.

Next, the state of the upper cover 7 is represented by the inclination angle of the rear cover 25 and the folding angle of the rear cover 25 and the front cover 26 .

The inclination angle of the rear cover 25 refers to the angle at which the rear cover 25 rotates around the rotation shaft 68 of the opening and closing connection device 27 and rotates from the fallen state to the opening direction.

The folding angle refers to, for example, the relative rotation angle of the front cover 26 relative to the rear cover 25 around the rotation axis 72 of the folding connection device 28, which is the angle at which the front cover 26 is rotated from the unfolded state to the folded direction.

As shown in Figure 5, also be provided with the above-mentioned detection switch that can be operated by the operating piece 69 that is provided with at the rear portion of rear cover 25, can correspond to the upper cover 7 when closing and switch the cover opening and closing state of circuit opening and closing. 13.

The operation piece 69 is a plate-like member protruding rearward from the rear edge of the rear cover 25 . The operating piece 69 is arranged on the side opposite to the rear cover 25 of the rotating shaft 68 of the opening and closing connection device 27 , and extends from the rear chamber 43 of the upper panel 11 when the upper cover 7 is closed.

The detection switch 13 has, for example, a pair of terminals 81 and 82 constituting a part of an electric circuit. The pair of terminals 81 and 82 are elastic, and the ends of the terminals 81 and 82 face each other and are arranged vertically with a certain interval therebetween. The end of the lower terminal 82 can be pushed up by the operation piece 69 .

When the rear cover 25 is in an upright state, as shown in FIG. 4 , the operating piece 69 extends downward, away from the detection switch 13 . In this way, the operating piece 69 does not operate the terminal 82 of the detection switch 13, the terminals 81 and 82 are separated from each other, the circuit is disconnected, and no power is supplied.

On the other hand, after the upper cover 7 is closed, along with the rotation of the rear cover 25 , the operating piece 69 rotates around the rotation axis 68 in the same direction as the rear cover 25 . When the rear cover 25 reaches a certain angle of inclination close to falling down (the rear cover 25 in this state is represented by a dotted line of two dots in Fig. 4), the operating piece 69 pushes the end of the terminal 82 upwards, allowing a pair of terminals to 81, 82 contact (the inclination angle of this state is called operation angle K1 below). Once the terminals 81 and 82 are in contact, the circuit is connected and can be energized. Back cover 25 continues to rotate, and after being in the state of falling down (the back cover 25 of this state is shown with a dotted line of one point in Fig. 4), operating piece 69 extends rearward in substantially horizontal direction, holds the terminal 81 of detection switch 13, 82 contacts.

After the upper cover 7 is opened, the operating piece 69 is pressed downward. The angle of inclination of the rear cover 25 is larger than the above-mentioned operating angle K1, and the terminals 81 and 82 are automatically disengaged because of their elasticity, and the circuit is disconnected. Disconnect, the spin-drying operation of washing spring 3 is promptly stopped.

Like this, when the inclination angle of the rear cover 25 is in the range from 0 degree in the fallen state to the operating angle, the detection switch 13 is operated, and the circuit is turned on. When the inclination angle of the rear cover 25 exceeds the operating angle, the detection switch 13 is not operated, and the circuit is disconnected.

If the upper cover 7 is closed in the folded state, since the front cover 26 is clamped between the rear cover 25 and the upper panel 11, the bottom of the rear cover 25 and the front cover 26 are close together, and the thickness of the front cover 26 limits the thickness of the rear cover. 25 of the rotation, the back cover 25 can not be rotated to stick to the upper panel, in a tilted state. As in this embodiment, when the left and right ends of the front cover 26 shown in the schematic diagram of FIG. The left and right ends of the shown front cover 26 are approximately the same as the rear cover 25 in the front-rear direction. $(\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="C0012961700281.png"\; state="\{\{state\}\}">L</figure-callout>}1=\mathrm{<figure-callout\; id="3"\; label="L"\; filenames="C0012961700281.png"\; state="\{\{state\}\}">L</figure-callout>}3\&cong;L2)$ Compared with the existing situation, the thickness of the front cover 26 restricts the rotation of the rear cover 25 to occur at a position farther from the rotation axis 68, so the inclination angle of the rear cover 25 tends to become smaller [Fig. 9 (a) inclination angle Ka > Fig. 9(b) inclination angle Kb]. Like this, the operation of detection switch 13 is just more convenient. In particular, when the above-mentioned dimension L2 is twice or more than the dimension L3, even when the dimension L2 is three times or more as in the present embodiment, the operation of the detection switch 13 becomes more convenient. And above-mentioned folded loam cake 7 makes delivery port 6 be in half-open state, as also can run in this state, then from the user's safety consideration, be undesirable.

In this embodiment, in order to prevent that when the upper cover 7 is closed, the inclination angle of the rear cover 25 in the half-open state is smaller than the operating angle, a plurality of protrusions 51, 52 are provided on the upper panel 11, and a plurality of protrusions 51, 52 are provided on the upper cover 7. A stopper 29 is provided as an inclination angle limiting device for limiting the inclination angle of the rear cover 25 .

The protrusions 51 and 52 are integrally formed with the upper panel 11 and protrude upward from the upper panel.

The protrusions 51 and 52 are provided at certain positions. At this certain position, the protrusions 51, 52 are in contact with the folded front cover 26, and when the upper cover 7 is folded and closed, the rear cover 25 is prevented from continuing to rotate in the closing direction, so that the operating piece 69 of the rear cover 25 is not aligned with the detection switch. 13 to switch. As shown in the schematic diagrams of Fig. 9(b) and Fig. 9(c), when the left and right ends 78, 79 of the front edge 64 of the protrusions 51, 52 abut against the front cover 26, the folding angle M of the front cover 26 is limited, Therefore, the angle N between the front cover 26 and the rear cover 25 becomes larger, and as a result, the distance between the rear cover 25 and the front edge 64 of the front cover 26 becomes longer [the distance Dc in FIG. 9(c) > FIG. 9(b) The distance Db], the inclination angle of the rear cover 25 when closed becomes larger [the inclination angle Kc of FIG. 9(c)>the inclination angle Kb of FIG. 9(b)].

The protrusions 51, 52 are located on the upper surface of the flange portion 41 of the upper panel 11, and are provided on the left and right sides of the injection opening 6, one on each side. Only one protrusion 51, 52 may be provided on the left or right. In this case, it is preferable to install it on the side where the detection switch 13 is provided in view of the relationship between left and right, and in this embodiment, it is preferable to install the protrusion 51 on the left side.

The protrusions 51, 52 are located near the center of the washing tub 3 (or the center of the circular arc around the inlet 6) when viewed from the front and rear. In particular, the left and right protrusions 51 , 52 are arranged in a shifted manner in the front-rear direction, and the left protrusion 51 is provided in front of the right protrusion 52 .

The respective protrusions 51, 52 are provided at positions where the upper cover 7 in the closed state can cover.

The protrusions 51 , 52 are cylindrical with a certain height, and the sides of the cylinder have portions abutting against the left and right ends 78 , 79 of the front edge 64 of the front cover 26 . The two protrusions 51, 52 have the same height. The tops of the protrusions 51, 52 are formed by smooth curved surfaces without sharp edges, so that the laundry will not be caught. The setting of the above-mentioned certain height, as will be explained later, when the top is to bear against the folded front cover 26, the angle of inclination of the folded rear cover 25 is greater than the operating angle.

The shape of the protrusions 51, 52 is not limited to the above-mentioned shapes. For example, the protrusions may be cylinders, prisms, or other shapes, such as hemispherical, conical, prismatic protruding upwards, and stepped with the rear being higher than the front, and the like.

The stopper 29 is arranged on the upper cover 7, because the two parts associated with the rotating shaft 72 connecting the rear cover 25 and the front cover 26, that is, the above-mentioned reinforcing rib 76 formed on the front cover 26 and abutting against the reinforcing rib 76 when folded The abutting portion 73 of the front edge 62 of the rear cover 25 constitutes.

From the right end to the left end of the upper cover 7, a plurality of stoppers 29 are provided.

As shown in the schematic diagrams of FIG. 9( b ) and FIG. 9( c ), the stopper 29 limits the folding angle M of the rear cover 25 and the front cover 26 when the rear cover 25 and the front cover 26 are folded through the abutment of the reinforcing rib 76 and the abutting portion 73 . After the folding angle M of the front cover 26 is limited, the angle N between the front cover 26 and the rear cover 25 becomes larger, and as a result, the distance between the rear cover 25 and the front edge 64 of the front cover 26 becomes longer, and the rear cover 25 when closed becomes longer. The inclination angle of the cover 25 becomes larger (Kc>Kb). According to the folding angle during the restricted folding, when the loam cake 7 is folded and closed, the front edge 64 of the folded front cover 26 and the protrusion 51 will surely abut against the front edge 64 of the front cover 26 and the flange of the upper panel 11. The position where the upper surface of the portion 41 abuts is in front of the protrusion 51 .

Since the reinforcing rib 76 and the abutting portion 73 of the stopper 29 are supplementary or reinforcing parts for forming the front cover 26 and the rear cover 25, the structure of the stopper 29 is simple, and as a result, an increase in cost can be prevented.

When the upper cover 7 is opened, the reinforcing rib 76 does not abut against the abutting portion 73 . When the rear cover 25 and the front cover 26 rotate relative to each other from the opened state to the folded state, the reinforcing rib 76 and the abutting portion 73 rotate around the rotation axis 72 and approach each other. After the reinforcing rib 76 abuts against the abutting portion 73, the front cover 26 and the rear cover 25 cannot continue to rotate in the folding direction, and the upper cover 7 is in a folded state. The folding angle at this time makes the lower face 66 of the front cover 26 and the lower face 65 of the rear cover 25 approach each other oppositely, and a gap can be ensured between the lower faces 65, 66, especially between the closest parts in the folded state. .

The washing machine 1 can open and close the upper cover 7 in various forms as described below by opening and folding the upper cover 7 and erecting or falling the rear cover 25 .

(1) When the upper cover 7 is opened and the rear cover 25 falls down, as shown in FIG. 1 , the injection port 6 is closed and becomes a closed state. At this time, the inclination angle of the rear cover 25 is 0 degrees along the upper panel 11 , and the operating piece 69 of the rear cover 25 can operate the detection switch 13 . The circuit is powered on.

When the rear cover 25 is rotated in the opening direction from this state, it becomes the following form.

(2) The upper cover 7 is opened, and the rear cover 25 is raised. At this time, the insertion port 6 is opened (opened state). The rear cover 25 is rotated about 10 degrees from the fallen state, and the detection switch 13 is not operated. The circuit is open.

(3) Grab the handle of the front cover 26 to erect the rear cover 25 from the state of (1), the upper cover 7 is in the folded state, and the rear cover 25 is in the erect state. At this time, the detection switch 13 is not operated, and the circuit is in an off state. The folding angles of the front cover 26 and the rear cover 25 are limited by the stopper 29 .

Catch the handle of front cover 26 and pull forward, just change the above-mentioned (1) mode from this mode. On the other hand, when the upper cover 7 is folded and the rear cover 25 is rotated in the closing direction, the following mode is obtained.

(4) The upper cover 7 is in the folded state, and the rear cover 25 is down. At this time, only the rear half of the insertion port 6 is closed and is in a half-closed state. As shown in FIG. 10 , the folding angle M is an angle limited by the stopper 29 , and the left end 78 of the front edge 64 of the front cover 26 abuts against the side of the left protrusion 51 . The inclination angle of the back cover 25 is larger than the operation angle, and the detection switch 13 is not operated, and the circuit is in an off state.

(5) In case, the stopper is worn, the folding angle will be greater than the angle limited by the stopper 29 . In this case, when the upper cover 7 is folded, the rear cover 25 is turned in the closing direction, and the front cover 26 slides over the protrusion 51 on the left side, and the rear cover 25 is in a fallen state. At this time, as shown in FIG. 11 , the insertion port 6 is in a half-open state, and the right end 79 of the front edge 64 of the front cover 26 abuts against the side surface of the right protrusion 52 . The top of the front cover 26 (downward at this time) abuts against the top of the left protrusion 51 . The angle of inclination of the rear cover 25 is smaller than the situation of (4) above, but larger than the operating angle, and the detection switch 13 is not operated, and the circuit is in an off state.

(6) In case, in the above-mentioned state of (4) or (5), the upper cover 7 is pressed onto the upper panel 11, the insertion port 6 is in a half-open state, and the protrusions on the top of the front cover 26 and the left and right sides The tops of 51 and 52 abut against each other. At this time, because a gap equivalent to the height of protrusions 51 and 52 has been ensured between the front cover 26 and the upper panel 11, the angle of inclination of the rear cover 25 is smaller than that of the above-mentioned (5), However, if it is larger than the operating angle, the detection switch 13 is not operated, and the circuit is in an off state.

Even if the upper part of the rear cover 25 in the above states (4) to (6) receives a downward load, the rear cover 25 is difficult to rotate because of the inclination angle limiting device, so that the detection switch 13 can be reliably prevented from malfunctioning. operate.

Like this, according to this embodiment, since the front edge 32 of the insertion port 6 is in the shape of a circular arc along the upper edge of the washing tub 3, compared with the linear one, the insertion port 6 looks larger, and as a result, it is passed It is more convenient to take and place washings from washing bucket 3.

The inside of the washing tub 3 can be seen clearly through the insertion port 6 whose front edge 32 is arc-shaped.

Especially, when the arc shape of the delivery port 6 is slightly larger than the upper edge of the washing tub 3, such as the upper opening 10 of the inner tub 5, since the peripheral portion 31 of the delivery opening 6 is arranged on the inner tub 5 upper opening of the washing tub 3 10, so when the laundry is taken out from the washing bucket 3, the laundry will not be placed in the opening 6, and the washing is more convenient to pick and place.

Especially, since the upper part of the insertion port 6 with the first wall surface 35 inclined downward expands to the outer side of the insertion port 6 than the lower part, it looks larger, and as a result, it is easier to take and place the laundry.

Since the storage chamber 42 is provided continuously from the front of the insertion port 6 to the left and right sides of the front, a space required for placing electrical components can be ensured. The reason why this is said is that the front edge 32 is cut into the placement chamber 42 because the front edge 32 is an arc-shaped insertion opening 6, and in front of the insertion opening 6, the front and rear width of the placement chamber 42 is narrow, while the left and right sides in front of the insertion opening 6 , The housing chamber 42 can be enlarged towards the rear. Therefore, for example, the installation of electrical components is more convenient, and the manufacturing cost of the washing machine can be reduced.

Since the electrical components are housed in the housing chamber 42, adhesion of water droplets can be reliably prevented.

The operation surface of the operation panel 8 is almost the same size as the housing chamber 42, so that a sufficient space required to ensure easy operation is ensured. For example, the display elements are easier to see and the switching elements are easier to operate.

Since the circuit board 15 is divided into two, the shape of the circuit board 15 placed in the storage chamber 42 with a narrow front and rear width in the central part in the left-right direction described above is formed by combining the parts divided into two, so the shape of each part is simple. , easy to manufacture, as a result the various parts are easy to manufacture.

If the shape of the circuit board 15 is complicated, it is very troublesome to place it, but it is not troublesome to place the circuit board with a simple shape. Therefore, dividing the circuit board into two can reduce the trouble of installation.

The cover plate 24 is not divided into two pieces, but one piece, which is because it is conducive to waterproofing and has a good appearance.

The power supply circuit board 17 and the operation switch circuit board 16 can be respectively fixed at appropriate heights by the first fixing column 47 and the second fixing column 48 . For example, the circuit board 16 for the operation switch can be fixed at a certain height according to the display element 22 or the switch element 21 , and the high electrical components can be reasonably arranged on the power circuit board 17 . As a result, it is possible to use relatively high-height electrical components 22 and the like that cannot be arranged on the same circuit board with display components and the like, and are relatively low in price, thereby reducing costs.

Since the protrusions 51 and 52 are provided, when the folded upper cover 7 is closed, the detection switch can be prevented from switching by mistake, and the washing machine is safer for users.

In particular, the tops of the protrusions 51, 52 protruding from the upper panel 11 bear against the front cover 26, so that the inclination angle of the rear cover 25 can be larger than the operating angle.

The upper cover 7 of the front cover 26 with the arc-shaped front edge 64 can cover the washing bucket 3 reliably, and can open the top of the placement chamber 42, so that the operating surface of the operating panel 8 is easier to operate.

After the front edge 64 of the front cover 26 is made into a circular arc shape, in the absence of the protrusions 51, 52, although the operating piece 69 of the rear cover 25 may misoperate the detection switch 13, in this embodiment, because Since the protrusions 51 and 52 are provided, the above-mentioned erroneous operation can be reliably prevented.

Because the protrusion 51 is located at the nearer side of the detection switch 13 in the left-right direction, it can prevent the rotation of the rear cover 25, and can more reliably prevent the rear cover from misoperation of the detection switch.

Because the projections 51, 52 are located on the left and right sides of the delivery port 6, even if one of the projections slips and does not abut against the front cover 26, there is another projection that abuts against the front cover 26, so it can be reliably prevented. The rotation of back cover 25.

Because the left and right protrusions 51, 52 are staggered in the front-rear direction position, therefore, if a protrusion that is arranged in the front slips and does not abut against the front cover 26, another protrusion that is arranged in the rear can reliably abut against the front cover 26, so it can The rotation of the rear cover 25 is more reliably prevented.

By setting the stopper 29, when folding, the rear cover 25 and the front cover 26 are not completely overlapped, but only folded to a certain angle. In this way, it can be ensured that when the upper cover 7 is folded and then the rear cover 25 is turned, the front cover 26 will abut against the protrusion 51 reliably, and when the front cover 26 is abutted against the protrusion 51, the stopper 29 and the protrusion 51 can cooperate together. , The rotation of the back cover 25 is reliably prevented. As a result, erroneous switching of the detection switch 13 by the back cover 25 can be more reliably prevented.

In particular, the stop 29 provided in association with the axis of rotation 72 of the folding connection 28 limits the angle of the folding near its center of rotation so that it does not open wide.

Since the stopper 29 has ensured the gap between the underside 65 of the back cover 25 and the underside 66 of the front cover 26 in the folded state, the undersides 65, 66 of the back cover 25 and the front cover 26 will not collide when folded. , so there is no collision sound, and the upper cover 7 can be opened quietly.

In particular, the stopper 29 associated with the rotation shaft 72 is relatively rigid, so that the sound of the rib 76 colliding with the abutment 73 is lower than that of the lower surfaces 65 , 66 .

By arranging the stopper 29, in the folded and opened state, the handle of the front cover 26 is closer to the user standing on the front of the washing machine 1, so the user can easily grasp the handle, and as a result, the handle can be easily moved. The upper cover 7 is closed from the folded open state.

Even if the above-mentioned inclination angle limiting device is applicable to the upper cover whose width (dimension in the front-rear direction when closed) of the front cover 26 is much shorter than that of the rear cover 25, it can prevent the misoperation of the above-mentioned detection switch, so it is preferably used.

In the above embodiment, the stopper 29 and the protrusions 51, 52 are used, but only one of them may be used. For example, the stopper 29 may not be provided, and only the protrusion may be provided. It is also possible to provide only the stopper 29 without the protrusion. If there is no concern about the misoperation of the detection switch 13, the stopper 29 and the protrusions 51, 52 can be omitted.

In addition to the washing and dehydration tubs described in the above embodiments, the washing tub 3 includes a tub dedicated to washing and a tub dedicated to spin-drying. For example, the washing bucket 3 of the above-mentioned embodiment can be a special bucket for drying, and the above-mentioned structure related to the upper panel 11, the insertion port 6 and the housing chamber 42 can also be applied to the special washing bucket.

Various changes can be made to the design within the scope of not changing the idea of the present invention.

Claims (5)

1. An electric washing machine, characterized in that there is a bottomed cylindrical washing tub with an open top, and an upper panel that is arranged above the washing tub and is formed with an inlet for taking out the laundry and putting it into the washing tub. The front edge of the mouth is arc-shaped along the upper edge of the washing bucket, and there is a room for placing electrical components on the upper panel. With the front left and right sides. 2. The electric washing machine according to claim 1, characterized in that the edge of the inlet, at least the front edge thereof, has a wall inclined downward toward the inside of the washing tub. 3. The electric washing machine according to claim 1 or 2, characterized in that a circuit board divided into two pieces is placed in the placement chamber, and a cover plate is installed on the placement chamber. 4. The electric washing machine according to claim 3, characterized in that one of the circuit boards divided into two is a power circuit board, on which electrical components with a higher height are arranged, and the circuit board divided into two The other of the boards is a circuit board for operating switches, on which switching elements and display elements with low heights are arranged, the first fixing column for fixing the power supply circuit board and the circuit board for fixing the operating switches The second fixed columns are arranged on the left and right respectively, and the above-mentioned first fixed columns are longer than the above-mentioned second fixed columns. 5. The electric washing machine according to claim 1, characterized in that there is an upper cover covering the inlet of the upper panel, the upper cover has a rear cover whose rear edge is rotatably connected to the rear of the upper panel, and rotatably The front cover connected to the front edge of the back cover, when closed, the back cover and the bottom of the front cover cover the upper panel side by side; The front edge forms an arc shape, which coincides with the arc-shaped front edge of the delivery port when it is closed. In the rear corner of the upper panel, there is an operating piece arranged at the rear of the rear cover, which is operated according to the position of the upper cover when it is closed. The detection switch for the opening and closing of the cover of the case switching circuit, when the upper cover is folded and closed, the operating piece of the rear cover does not switch the detection switch, and a certain position on the upper panel is provided to prevent it from touching the folded front cover. The protrusion that the back cover continues to turn towards the closing direction.

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