JP7088903B2 - Closure opening / closing mechanism, air conditioner - Google Patents

Description

The present invention relates to a lid opening / closing mechanism for opening / closing a lid.

In a general air conditioner, the front panel provided on the front surface of the indoor unit is opened for removing the filter of the indoor unit. At this time, the front panel is held in a state of being opened at a constant angle with respect to the indoor unit main body. Further, in the air conditioner, the front panel is removed from the indoor unit main body in order to remove the blower fan, fan motor, etc. in the indoor unit.

For example, Patent Document 1 includes a front panel that can be opened and closed by a support shaft that is detachably supported in a shaft hole of a main body case of an indoor unit, and the front panel is opened at a certain angle with respect to the main body case. An air conditioner in which the front panel is detachable from the main body case is disclosed.

Japanese Patent Publication "Japanese Patent Laid-Open No. 8-135994 (published May 13, 1996)"

By the way, in Patent Document 1, when the front panel is opened by rotating the front panel with respect to the main body case, the protrusion provided on the arm supporting the front panel rides on the protrusion provided on the main body case. , The front panel is opened and held at a certain angle. Further, when the front panel is opened from this state, the protrusion provided on the arm rides on another protrusion provided on the main body case, and the front panel is opened in the main body case with the front panel opened at a certain angle. It becomes removable from. Attaching the main body case of the removed front panel is the reverse of the above procedure.

As described above, in Patent Document 1, in order to maintain the open state of the front panel and make it removable, it is necessary for the protrusions provided on the arm of the front panel to ride on a plurality of protrusions provided on the main body case. .. Therefore, in order to firmly hold the front panel in the open state, it is necessary to make the protrusions ride tightly. However, if the protrusions ride on each other tightly, the frictional force between the protrusions increases, making it difficult to attach, remove, and open / close the front panel, and there arises a problem that abnormal noise is generated during attachment, removal, and opening / closing.

In addition, if the protrusions are loosened, the frictional force between the protrusions will be reduced, making it easier to attach, remove and open and close the front panel, and further suppress the generation of abnormal noise when attaching, removing and opening and closing the front panel. Although it is possible, it becomes difficult to hold the front panel at a certain angle with respect to the main body case, and there is a possibility that the front panel may fall off from the main body case.

One aspect of the present invention is a lid opening / closing mechanism capable of smoothly attaching, detaching, and opening / closing the front panel to the main body case, and suppressing the generation of abnormal noise due to the attachment / removal / opening / closing of the front panel to the main body case. The purpose is to provide.

In order to solve the above problems, the lid opening / closing mechanism according to one aspect of the present invention is a lid opening / closing mechanism that opens / closes a lid detachably attached to a housing, and supports the lid on one end side. A member, a rotating shaft provided on the support member, rotatably supported by a bearing portion formed in the housing, and in a state of being detachable from the bearing portion when rotated by a predetermined angle, and the housing. The receiving portion provided in the above and the supporting member are engaged with the receiving portion at a fixed support position while the lid is rotated at a predetermined angle around the rotation axis, so that the rotating portion is rotating. A fixed support portion for fixing and supporting the lid at another predetermined angle is provided, and the receiving portion has a convex shape protruding in a direction perpendicular to the axial direction of the rotation axis, and is formed from a closed position of the lid. In the process of rotating to the fixed support position, the surface of the receiving portion that the fixed support portion contacts increases in height from the position where the fixed support portion first contacts to the position where the fixed support portion contacts. The rotary shaft is an inclined surface, and the rotary shaft rotates on the bearing surface of the bearing portion from the closed position of the lid to the detachable position of the lid beyond the fixed support position by the fixed support portion. The surfaces rotate while touching.

According to one aspect of the present invention, it is possible to smoothly attach, remove, and open / close the lid to the housing, and to suppress the generation of abnormal noise due to the attachment, removal, and opening / closing of the lid to the housing. Play.

It is a schematic perspective view of the air conditioner which concerns on Embodiment 1 of this invention. FIG. 3 is a schematic cross-sectional view showing a state in which the front panel of the air conditioner shown in FIG. 1 is closed. FIG. 3 is a schematic cross-sectional view showing a state in which the front panel of the air conditioner shown in FIG. 1 is opened to a position where the dust box can be attached and detached. FIG. 3 is a schematic cross-sectional view showing a state in which the front panel of the air conditioner shown in FIG. 1 is opened to a position where the front panel can be attached and detached. It is a figure for demonstrating the operation of the lid opening / closing mechanism in a state where the front panel shown in FIG. 3B is opened to the position where the dust box is detachable. It is a figure for demonstrating the adjustment of the attachment / detachment strength of a front panel. It is a figure for demonstrating the adjustment of the holding strength of a front panel. It is a figure for demonstrating the adjustment of the slit position height of a bearing part, and the adjustment of the slit position height of a stopper. It is an enlarged view of the main part H of FIG. It is a figure which shows the example which provided the rib on the back surface of the stopper receiving part. It is a schematic block diagram of the lid opening and closing mechanism which concerns on Embodiment 2 of this invention. It is a schematic block diagram of the lid opening and closing mechanism which concerns on Embodiment 3 of this invention. It is a schematic block diagram of the lid opening and closing mechanism which concerns on Embodiment 4 of this invention. It is a schematic block diagram of the lid opening and closing mechanism which concerns on Embodiment 5 of this invention.

[Embodiment 1]
Hereinafter, embodiments of the present invention will be described as follows. In the present embodiment, as a device to which the lid opening / closing mechanism of the present invention is applied, an indoor unit of a separate type air conditioner mounted on a wall surface of the room will be described as an example.

(Outline configuration of indoor unit)
1A and 1B are perspective views showing the appearance of an indoor unit 1 of an air conditioner (air conditioner), FIG. 1A shows a state in which the front panel (lid) 20 is closed, and FIG. 1B shows a state in which the front panel 20 is opened. Indicates the state.

As shown in FIG. 1, the indoor unit 1 supports the operation of the main body (housing) 10, the front panel 20 covering the front surface of the main body 10, and the front panel 20 so as to open and close the front surface 10a of the main body 10. A lid opening / closing mechanism 30 is provided for this purpose.

Although not shown, the main body 10 is provided with various members that are naturally provided in the indoor unit 1 of an air conditioner such as a blower fan (for example, a cross flow fan or a propeller fan) and a heat exchanger. In this embodiment, the description of these various members will be omitted.

Further, the main body 10 is provided with a dust box 40 on the front surface. The dust box 40 is one of the components of the filter cleaning device provided in the main body 10. The filter cleaning device removes dust such as dust and dirt adhering to the filter and stores the dust in the dust box 40. The dust box 40 is detachably installed from the main body 10.

The front panel 20 is in a closed state for closing the front surface of the main body 10 as shown in FIG. 1 (a) and an open state for opening the front surface 10 a of the main body 10 as shown in FIG. 1 (b). It is rotatably provided with respect to the main body 10. When the front panel 20 is in the open state shown in FIG. 1B, the user attaches / detaches the dust box 40 from the front surface 10a of the main body 10. The filter can also be attached and detached with the dust box 40 removed.

The front panel 20 is rotated by a predetermined angle in the opening direction with reference to the time when the front panel 20 is further opened from the open state shown in FIG. 1 (b), that is, when the front panel 20 is in the closed state. When the state is reached, the front panel 20 becomes removable from the main body 10. That is, the front panel 20 is in a three-stage state of a closed state shown in FIG. 1 (a), an open state shown in FIG. 1 (b), and a state in which the opened front panel 20 can be attached and detached. It is configured. The above-mentioned three-step opening / closing of the front panel 20 is realized by the lid opening / closing mechanism 30.

The opening angle of the front panel 20 with respect to the main body 10 is approximately 90 ° in the state shown in FIG. 1 (b). However, the opening angle is not limited to 90 °, and any angle can be used as long as the front panel 20 is opened to the extent that the user can perform maintenance such as attaching / detaching the dust box 40 in the main body 10. You may. Further, the opening angle when attaching and detaching the front panel 20 may be slightly larger than the opening angle shown in FIG. 1 (b), and any angle may be used as long as the front panel 20 can be attached and detached. May be good.

(Outline of lid opening / closing mechanism 30)
2A and 2B are views for explaining the operation of the lid opening / closing mechanism 30 when the front panel 20 is in the closed position, and FIG. 2A is a view showing a cross section of the main body 10; ) Is an enlarged view of the main part of (a).

FIG. 3 is a diagram for explaining the operation of the lid opening / closing mechanism 30 when the front panel 20 is opened to a position where the dust box 40 can be attached and detached, and FIG. 3A is a diagram showing a cross section of the main body 10. It is a figure which shows, and (b) is an enlarged view which enlarged the main part of (a).

4A and 4B are views for explaining the operation of the lid opening / closing mechanism 30 when the front panel 20 is opened to a position where the front panel 20 can be attached and detached, and FIG. 4A is a diagram for explaining the operation of the lid opening / closing mechanism 30. It is a figure which shows the cross section, and (b) is an enlarged view which enlarged the main part of (a).

The front panel 20 is rotatably supported in the arrow XY directions about the rotation shaft 32 (described later) by the lid opening / closing mechanism 30. That is, the front panel 20 is rotated in the direction of arrow X from the closed position (closed position) shown in FIG. 2A, opened slightly, and the dust box 40 shown in FIG. 3A is attached and detached. The front panel 20 shown in FIG. 4A is detachable by being temporarily fixedly supported at a position where it is possible (fixed support position), further rotated in the direction of arrow X, and further opened. Rotate to the position (removable position). Further, the front panel 20 rotates in the direction of the arrow Y from the state shown in FIG. 4A, passes through the state shown in FIG. 3A, and becomes the closed state shown in FIG. 2A. .. Here, the closed state means a state in which the front surface of the main body 10 of the indoor unit 1 is closed by the front panel 20. Normally, air conditioning such as cooling and heating of the air conditioner is executed when the front panel 20 is in the closed state. The state in which the dust box 40 can be attached and detached means a state in which the front panel 20 is opened until the dust box 40 and the filter installed in the main body 10 can be attached and detached to the main body 10. Further, the state in which the front panel 20 can be attached / detached means a state in which the front panel 20 is further opened than in a state in which the dust box 40 can be attached / detached, and the state in which the front panel 20 can be attached / detached to / from the main body 10.

As described above, the lid opening / closing mechanism 30 is a mechanism for rotatably supporting the front panel 20 with respect to the main body 10, and the arm (support member) 31 for supporting the front panel 20 and the arm 31. It is provided and is rotatably supported by the bearing portion (bearing upper portion) 11 and the bearing portion (bearing lower portion) 12 formed on the main body 10, and can be detached from the bearing portions 11 and 12 when rotated by a predetermined angle. 20 33 is provided with a stopper (fixed support shaft) 33 that fixedly supports the bearing at a predetermined angle.

The bearing portion (upper part of the bearing) 11 and the bearing portion (lower part of the bearing) 12 are arranged so as to face each other, and the rotating shaft 32 is sandwiched from above and below to rotatably support the rotating shaft 32. The bearing portions 11 and 12 are both made of an elastic member, for example, a resin. In the present embodiment, the bearing portion 12 has a structure that bends, and the bearing portion 11 has a structure that does not bend (at least has a strength that does not bend when the rotating shaft 32 is attached or detached). The bearing portion 11 may have a flexible structure, and the bearing portion 12 may not bend. Here, the bearing portion 11 has an arc-shaped shaft upper support surface that receives the outer peripheral surface 32 of the cylindrical rotating shaft. The shaft upper support surface is on the front side and above the center of the rotating shaft 32 from directly above the rotating shaft 32 when the rotating shaft 32 is positioned in a state where the front panel 20 is closed (see FIG. 2B). However, it is located below the tangent line directly above the rotating shaft 32). Here, the front means the direction in which the front panel 20 is removed from the main body 10. Further, the upper direction means a direction opposite to the vertical direction (direction of gravity) in the main body 10. Further, the bearing portion 12 has an arc-shaped lower support surface for receiving the outer peripheral surface 32 of the cylindrical rotating shaft. The lower support surface of the shaft is located in front of and below the center of the rotary shaft 32 from directly below the rotary shaft 32 when the rotary shaft 32 is positioned in a state where the front panel 20 is closed (see FIG. 2B). However, it is located so as to be above the tangent line that is in contact with the rotation shaft 32 directly below. As a result, the rotating shaft 32 is in close contact with the shaft upper support surface of the bearing portion 11 and the shaft lower support surface of the bearing portion 12 until it is detached. Further, the bearing portions 11 and 12 have protrusions on the surfaces supporting the rotating shaft 32, respectively, for restricting the movement of the rotating shaft 32 in the taking-out direction (direction in which the front panel 20 is taken out from the main body 10) of the front panel 20. A portion (first protrusion) 11a and a protrusion (second protrusion) 12a are formed. The protrusion 11a is an arcuate convex portion that is continuous from the front end portion of the shaft upper support surface to the front side. Further, the protrusion 12a has a surface extending in the horizontal direction from the front end portion of the shaft lower support surface, and is composed of a surface extending forward and downward from the front end portion of the surface. The closed state shown in FIG. 2 (b), the dust box 40 shown in FIG. 3 (b) can be attached and detached, and the front panel 20 shown in FIG. 4 (b) can be attached and detached by the protrusions 11a and 12a. In any of the above, the movement of the rotating shaft 32 is restricted. However, in the front panel removed state shown in FIG. 4B, by moving the front panel 20 in the direction of arrow Z, the bearing portion 11 does not bend and the bearing portion 12 bends due to the movement of the rotating shaft 32. The rotating shaft 32 gets over the protrusions 11a and 12a. The width of the guide space on the right side of the protrusions 11a and 12a is wider than the vertical width of the bearing portions 11 and 12 on the left side of the protrusions 11a and 12a. This makes it easier to insert the shaft into the guide space when mounting the front panel, and the bearing portions 11 and 12 can firmly support the shaft. Further, the guide space is located below the bearing portions 11 and 12. This makes it easier for the rotating shaft to come into contact with the bearing portion 12 when the front panel 20 is attached, so that the bearing portion 12 can be easily bent and attached. Further, the distance (height) D1 from the apex of the protrusion 11a to the line passing through the axis center x and the distance (height) D2 from the apex of the protrusion 12a to the line passing through the axis center x are the distance D2. Is larger (see Fig. 6). By doing so, when the front panel 20 is removed, the rotating shaft 32 is easily guided to the bearing portion 12 side.

In the present embodiment, as shown in FIG. 2B, the rotating shaft 32 has a cylindrical shape and a part of the outer peripheral surface 32a is flat. This flat surface is referred to as a D-cut surface 32a1. The remaining surface of the outer peripheral surface 32a is referred to as a peripheral surface 32a2. The rotating shaft 32 is formed so as to rotate so that the D-cut surface 32a1 comes to a position facing the bearing portion 12 when the front panel 20 is removed, as shown in FIG. 4B. There is. As a result, the rotating shaft 32 can easily get over the protrusion 12a of the bearing portion 12 due to the D-cut surface 32a1. Here, the bearing 11 does not have a spring property (it has a strength that does not bend at least when the rotary shaft 32 is attached / detached), and the bearing portion 12 has a spring property so that the D-cut surface 32a1 of the rotary shaft 32 has a spring property. Pushes the bearing portion 12 downward so that the rotating shaft 32 can be removed from the bearing portions 11 and 12.

Moreover, since the peripheral surface 32a2 of the outer peripheral surface 32a other than the D-cut surface 32a1 is always in close contact with the bearing portion 11, the rotary shaft 32 can be easily removed from the bearing portions 11 and 12. There is no such thing. In particular, except for the removed state of the front panel 20 shown in FIGS. 4A and 4B, the rotating shaft 32 has the outer peripheral surface 32a in close contact with both the bearing portions 11 and 12, so that the rotating shaft 32 rotates. The shaft 32 is more difficult to come off from the bearing portions 11 and 12.

Like the rotating shaft 32, the stopper 33 is made of a member having a substantially circular cross section, and the outer peripheral surface 33a can be brought into close contact with the concave engaging surface of the stopper receiving portion 13. That is, as shown in FIGS. 3A and 3B, the stopper 33 is in close contact with the engaging surface of the stopper receiving portion 13 when the dust box is removed. As a result, the rotation of the rotating shaft 32, that is, the rotation of the front panel 20, can be restricted, and the holding force for holding the front panel 20 in the open state at a predetermined position can be strengthened.

As shown in FIG. 3B, the stopper receiving portion 13 engages the stopper 33 formed on the arm 31 in a state where the dust box 40 can be attached and detached. When the stopper receiving portion 13 is in the closed state shown in FIG. 2B and in the state in which the front panel 20 shown in FIG. 4B is removable, the engagement with the stopper 33 is released. Become.

(Operation of lid opening / closing mechanism 30)
FIG. 5 is a diagram for explaining the operation of the lid opening / closing mechanism 30 in a state where the dust box 40 shown in FIG. 3B can be attached and detached.

The engaging position where the stopper 33 is engaged by the stopper receiving portion 13 is deviated from the straight line (axis line) extending in the vertical direction (direction of gravity) from the rotating shaft 32 in the removal direction (forward) of the front panel 20. In this case, the engaging position is a position where the straight line extending in the vertical direction from the rotating shaft 32 and the straight line extending from the rotating shaft 32 toward the stopper 33 are separated by an angle θ. The angle θ is preferably 15 °, but is not limited to this, and may be larger than 0 °. That is, the engaging position may be as far forward as possible (in the removing direction of the front panel 20) from the straight line extending in the vertical direction from the rotating shaft 32. Further, when the stopper 33 is in the engaging position, the outer peripheral surface 32a of the rotating shaft 32 is in close contact with the bearing portion 11.

As described above, since the engaging position is in front of the straight line extending in the vertical direction from the rotation shaft 32, when the front panel 20 is removed, the stopper 33 rotates in the arrow A direction with the rotation shaft 32 as a fulcrum. , The engagement between the outer peripheral surface 33a of the stopper 33 and the contact surface 13a of the stopper receiving portion 13 is easily released. On the other hand, when the stopper 33 is in the engaged position, the outer peripheral surface 32a of the rotary shaft 32 is in close contact with the bearing portion 11. Therefore, when the front panel 20 is closed, the stopper 33 uses the rotary shaft 32 as a fulcrum. Rotates in the direction of arrow B. In this case, the engaging force between the stopper 33 and the stopper receiving portion 13 increases, and the rotating shaft 32, which is a fulcrum, tries to move in the direction of arrow C, but the rotating shaft 32 is firmly held by the bearing portion 11. The fulcrum does not move from the rotation axis 32. Therefore, the front panel 20 can be closed smoothly. Moreover, it is possible to suppress the generation of abnormal noise due to friction of each part, which occurs when the front panel 20 is closed. Further, by changing the above angle θ, the engaging force between the stopper 33 and the stopper receiving portion 13 can be freely set.

Further, when the front panel 20 shown in FIGS. 2 (a) and 2 (b) is in the closed state, the rotating shaft 32 is sandwiched in a state of being in close contact with the bearing portions 11 and 12 on the surface, so that the front panel 20 is sandwiched. Can be securely fixed. Further, even if the front panel 20 is forcibly opened from (a) and (b) of FIG. 4, the front panel can be rotated in the direction of arrow X beyond the state shown in (a) and (b) of FIG. Since the 20 is easily removable, the opening / closing mechanism of the front panel 20 will not be damaged.

(Adjustment of engaging force by lid opening / closing mechanism 30)
FIG. 6 is a diagram for explaining C.

FIG. 7 is a diagram for explaining the adjustment of the holding strength of the front panel 20.

FIG. 8 is a diagram for explaining the adjustment of the slit position height of the bearing portion 12 and the adjustment of the slit position height of the stopper 13.

FIG. 9 is an enlarged view of the main part H of FIG.

In the removed state of the front panel 20 shown in FIGS. 4A and 4B, as shown in FIG. 6, the distance from the axis center X of the rotating shaft 32 to the D-cut surface 32a1 of the outer peripheral surface 32a of the rotating shaft 32. By adjusting the slit (not shown) position height E in D2 and the bearing portion 12, the removal strength (removal hardness) of the front panel 20 can be easily adjusted.

Further, in the dust box removed state shown in FIGS. 3A and 3B, as shown in FIG. 7, the distance G from the bottom surface of the contact surface 13a of the stopper receiving portion 13 to the top portion 13b and the slit of the stopper receiving portion 13 ( By adjusting the position height F (not shown), the engaging force of the stopper 33 and the engaging hardness can be easily adjusted.

For example, as shown in FIGS. 8 and 9, the height E of the slit 101 provided in the bearing portion 12 and the height F of the slit 102 provided in the stopper receiving portion 13 are adjusted. If E and F are increased, the bearing portion 12 and the stopper receiving portion 13 are likely to bend, so that the removal strength of the front panel 20 is weakened. On the contrary, if E and F are lowered, the bearing portion 12 and the stopper receiving portion 13 are less likely to bend, so that the removal strength of the front panel 20 is strengthened.

Further, in order to adjust the removal strength of the front panel 20, as shown in FIG. 10, ribs 103 and 103 are provided on the back surface of the stopper receiving portion 13, and the heights of the ribs 103 and 103 are adjusted. good. In this case, the higher the height of the ribs 103 and 103, the less likely the stopper receiving portion 13 is to bend, so that the removal strength of the front panel 20 is strengthened.

From the above, it becomes easy to adjust the hardness when attaching and detaching the front panel 20, and it becomes easy to adjust the holding force when the front panel 20 is temporarily fixed (when the dust box is removed), and the front panel 20 becomes easy to adjust. It has the effect of reducing abnormal noise when installing and removing.

Further, by changing the shape of the rotating shaft 32 and the shape of the stopper 33, it is possible to realize a lid opening / closing mechanism that exerts various effects. This point will be described in the following embodiments 2 to 5.

[Embodiment 2]
Other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals are given to the members having the same functions as the members described in the above-described embodiment, and the description thereof will be omitted.

FIG. 11 is a diagram for explaining the operation of the lid opening / closing mechanism 130 according to the present embodiment in the dust box removed state.

The lid opening / closing mechanism 130 has substantially the same configuration as the lid opening / closing mechanism 30 of the first embodiment, and is different in the cross-sectional shape of the rotating shaft 132. As shown in FIG. 11, the cross-sectional shape of the rotating shaft 132 is a circular shape without a D-cut surface. That is, as described above, the rotary shaft 132 has a substantially circular cross section, and the rotary shaft 132 is mounted on the bearing surface (shaft upper support surface, shaft lower support surface) of the rotary shaft 132 of the bearing portions 11 and 12. It is formed in a shape that allows the outer peripheral surface (rotating surface) of the bearing to be in close contact with each other. The stopper 133 has the same shape as the stopper 33 of the lid opening / closing mechanism 30 of the embodiment, and has a circular cross-sectional shape.

Since the D-cut surface is abolished in the rotary shaft 132, the outer peripheral surface of the rotary shaft 132 is always in close contact with the bearing portions 11 and 12, so that the rotary shaft is in close contact with the bearing portions 11 and 12 even when the front panel 20 is removed. Since the 132 has no D-cut surface, the adhesion between the rotating shaft 132 and the bearing portion 12 is increased, and the pulling strength of the front panel 20 can be increased. That is, the front panel 20 can be prevented from easily falling off from the main body 10.

[Embodiment 3]
Other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals are given to the members having the same functions as the members described in the above-described embodiment, and the description thereof will be omitted.

FIG. 12 is a diagram for explaining the operation of the lid opening / closing mechanism 230 according to the present embodiment in the dust box removed state.

The lid opening / closing mechanism 230 has substantially the same configuration as the lid opening / closing mechanism 30 of the first embodiment, and is different in the shape of the stopper 233. As shown in FIG. 12, the cross-sectional shape of the stopper 233 is a shape having a D-cut surface. The rotary shaft 232 has a circular cross-sectional shape having a D-cut surface, which is the same as the rotary shaft 32 of the lid opening / closing mechanism 30 of the first embodiment.

Further, in the present embodiment, the contact surface of the stopper receiving portion 213 with the stopper 233 has a planar shape. As a result, when the dust box of the front panel 20 is removed, the D-cut surface of the stopper 233 and the contact surface of the stopper receiving portion 213 can face each other and can be brought into close contact with each other.

This makes it possible to stably open the front panel 20 when the dust box of the front panel 20 is removed. That is, the opening / closing angle of the front panel 20 can be kept constant by adjusting the inclination of the contact surface when the D-cut surface of the stopper 233 and the contact surface of the stopper receiving portion 213 are in close contact with each other.

Further, as described with reference to FIG. 6 of the first embodiment, the front surface is adjusted by adjusting the distance from the axis center X of the rotating shaft 232 to the D cut surface and the height of the slit position in the bearing portion 12 and the stopper receiving portion 13. The removal strength (removal hardness) of the panel 20 can be easily adjusted.

[Embodiment 4]
Other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals are given to the members having the same functions as the members described in the above-described embodiment, and the description thereof will be omitted.

FIG. 13 is a diagram for explaining the operation of the lid opening / closing mechanism 330 according to the present embodiment in the dust box removed state.

The lid opening / closing mechanism 330 has substantially the same configuration as the lid opening / closing mechanism 30 of the first embodiment, and is different in the shapes of the rotating shaft 332 and the stopper 333. As shown in FIG. 13, the rotation shaft 332 has a circular shape without a D-cut surface. The stopper 333 has a shape having a D-cut surface like the stopper 233 of the third embodiment.

Further, in the present embodiment, similarly to the third embodiment, the contact surface of the stopper receiving portion 213 with the stopper 233 has a planar shape. Specifically, the stopper 233 has a plane on the outer peripheral surface supported by the stopper receiving portion 213, which is parallel to the direction in which the stopper 233 is detached from the stopper receiving portion 213, so that the front panel 20 can be detached. At the position, it faces the upper surface of the stopper receiving portion 213.

As a result, the stopper 233 and the stopper receiving portion 213 can be brought into close contact with each other on the surface. As a result, the opening / closing angle of the front panel 20 at the fixed support position can be adjusted by adjusting the inclination of the contact surface.

As a result, the opening / closing angle of the front panel 20 can be kept constant by adjusting the inclination of the contact surface when the D-cut surface of the stopper 233 and the contact surface of the stopper receiving portion 213 are in close contact with each other.

Moreover, since the D-cut surface of the rotating shaft 332 is abolished, the outer peripheral surface of the rotating shaft 332 always keeps in close contact with the bearing portions 11 and 12. Therefore, even when the front panel 20 is removed, the contact force between the rotary shaft 332 and the bearing portion 12 increases because the rotary shaft 332 does not have a D-cut surface, and the pull-out strength of the front panel 20 can be increased. can.

[Embodiment 5]
Other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals are given to the members having the same functions as the members described in the above-described embodiment, and the description thereof will be omitted.

The lid opening / closing mechanism 430 has substantially the same configuration as the lid opening / closing mechanism 30 of the first embodiment, and is different in the shape of the stopper 433. As shown in FIG. 14, the stopper 433 has a rib 433a formed in a portion facing the stopper receiving portion 213. The rotary shaft 432 has the same shape as the rotary shaft 32 of the lid opening / closing mechanism 30 of the embodiment.

Further, in the present embodiment, the contact surface of the stopper receiving portion 213 with the stopper 433 has a planar shape. As a result, when the dust box of the front panel 20 is removed, the rib 433a of the stopper 433 and the contact surface of the stopper receiving portion 213 are in contact with each other facing each other.

As a result, by adjusting the protruding length of the rib 433a, it is easy to finely adjust the holding force of the front panel 20 when the dust box of the front panel 20 is removed, and finely adjust the opening / closing angle of the front panel 20. You can do it easily.

〔summary〕
The lid opening / closing mechanism according to the first aspect of the present invention is a lid opening / closing mechanism for opening / closing a lid (front panel 20) detachably attached to a housing (main body 10), and the lid (front panel 20) is used. When the support member (arm 31) to be supported and the bearing portions 11 and 12 provided on the support member (arm 31) and formed in the housing (main body 10) are rotatably supported and rotated by a predetermined angle. The rotating shaft 32 that can be detached from the bearing portions 11 and 12 and the lid (front surface) that is provided on the support member (arm 31) and is rotating while the rotating shaft 32 rotates at the predetermined angle. A fixed support shaft (stopper 33) that fixedly supports the panel 20) at another predetermined angle is provided, and the rotary shaft 32 is a closed position (a position where the front panel is closed) of the lid (front panel 20). ) Beyond the fixed support position (position where the dust box 40 can be attached and detached) by the fixed support shaft (stopper 33), and the detachable position of the lid (front panel 20) (the state where the front panel 20 can be attached and detached). It is characterized in that the rotating surface of the rotating shaft 32 rotates while being in contact with the bearing surface of the bearing portions 11 and 12 until the position is reached.

According to the above configuration, the rotation shaft of the lid is in close contact with the bearing portion provided in the housing from the closed position of the lid to the detachable position of the lid beyond the support position by the fixed support shaft. Therefore, the center of rotation (fulcrum) of the lid is always the axis of rotation, and the fulcrum does not move from the axis of rotation, so that the lid can be opened and closed smoothly.

As a result, the lid can be smoothly attached to, removed and opened / closed, and the generation of abnormal noise due to the attachment / removal / opening / closing of the lid to the housing can be suppressed.

In the lid opening / closing mechanism according to the second aspect of the present invention, in the first aspect, the position of the fixed support shaft (stopper 33) at the fixed support position is the lid with respect to the axis extending in the vertical direction from the rotary shaft 32. It may be displaced to the detachable position side of (front panel 20).

According to the above configuration, the position of the fixed support shaft at the fixed support position is shifted from the fixed support position to the detachable position side of the lid with respect to the axis extending in the vertical direction from the rotation axis. The fixed support shaft can be easily moved to the removable position of the lid. On the other hand, from the fixed support position to the closed position of the lid, it is necessary to cross the axis extending vertically from the rotation axis, so a slight load is applied to the rotation of the lid, and the rotation axis moves in the direction opposite to the rotation direction of the lid. However, since the rotating shaft is in close contact with the bearing portion on the surface, the rotating shaft does not move in the direction opposite to the rotating direction of the lid. Therefore, the lid can be opened and closed stably.

In the lid opening / closing mechanism according to the third aspect of the present invention, in the first or second aspect, the rotary shaft 32 is on the outer peripheral surface 32a supported by the bearing portions 11 and 12, and the rotary shaft 32 is the bearing portion 11. A plane parallel to the direction of detachment from 12 is formed, and the plane formed on the rotating shaft 32 is the outer peripheral surface 32a of the bearing portions 11 and 12 at the detachable position of the lid (front panel 20). It may be located on the opposite side of the contact direction.

According to the above configuration, the plane formed on the rotating shaft is located on the side opposite to the contact direction of the outer peripheral surface of the bearing portion at the detachable position of the lid, so that the lid can be detached from the detachable position of the lid. The rotating shaft can be smoothly removed from the bearing portion. As a result, if the lid is opened to a detachable position, the lid can be easily removed from the housing.

In the lid opening / closing mechanism according to the fourth aspect of the present invention, in any one of the first to third aspects, the rotary shaft 132 has a substantially circular cross section, and the rotary bearing surface of the bearing portions 11 and 12 is the above. It may be formed in a shape so that the outer peripheral surface of the rotating shaft 132 can be in close contact with the outer peripheral surface.

According to the above configuration, the rotating shaft has a substantially circular cross section, and the rotating bearing surface of the bearing portion is formed so that the outer peripheral surface of the rotating shaft can be in close contact with the outer peripheral surface of the rotating shaft. Since it is always in close contact with the bearing, even when the lid is removed, the contact force between the rotating shaft and the bearing increases because there is no D-cut surface on the rotating shaft, and the pulling strength of the lid is increased. Can be done. That is, the lid can be prevented from easily falling off from the housing.

In the lid opening / closing mechanism according to the fifth aspect of the present invention, in any one of the first to fourth aspects, the fixed support shaft (stopper 233) is formed in the housing (main body 10) at the fixed support position. The fixed support shaft (stopper 233) is supported on the outer peripheral surface of the fixed support shaft (stopper 233) supported by the fixed support bearing portion (stopper receiving portion 213). A flat surface is formed in which the stopper 233) is parallel to the direction in which the fixed support bearing portion (stopper receiving portion 213) is detached, and the flat surface formed on the fixed support shaft (stopper 233) is the lid (front panel 20). The fixed support bearing portion (stopper receiving portion 213) may face the upper surface of the fixed support bearing portion (stopper receiving portion 213) at the detachable position.

According to the above configuration, the fixed support shaft has a plane on the outer peripheral surface supported by the fixed support bearing portion, which is parallel to the direction in which the fixed support shaft is detached from the fixed support bearing portion. By facing the upper surface of the fixed support bearing portion at a possible position, the fixed support shaft and the fixed support bearing portion can be brought into close contact with each other on the surface. As a result, the opening / closing angle of the lid at the fixed support position can be adjusted by adjusting the inclination of the contact surface.

In the lid opening / closing mechanism according to the sixth aspect of the present invention, in any one of the first to fourth aspects, the fixed support shaft (stopper 333) is formed in the housing (main body 10) at the fixed support position. The fixed support bearing portion is supported on the outer peripheral surface of the fixed support shaft (stopper 333) supported by the fixed support bearing portion (stopper receiving portion 213) and supported by the fixed support bearing portion (stopper receiving portion 213). At least one rib 433a projecting toward (stopper receiving portion 213) may be provided.

According to the above configuration, the fixed support shaft is fixed by providing at least one rib protruding toward the fixed support bearing portion on the outer peripheral surface supported by the fixed support bearing portion. The distance between the support shaft and the fixed support bearing can be adjusted by the length of the rib. That is, by adjusting the length of the rib, it is possible to adjust the degree of adhesion between the fixed support shaft and the fixed support receiving portion and the angle of the contact portion. This facilitates fine adjustment of the holding force of the lid in a detachable state of the lid, and also facilitates fine adjustment of the opening / closing angle of the lid.

In the lid opening / closing mechanism according to the seventh aspect of the present invention, in any one of the first to sixth aspects, the bearing portions 11 and 12 include a bearing upper portion (bearing portion 11) that supports the rotating shaft 32 from above. The bearing portion (bearing portion 12) that supports the rotating shaft 32 from below is included, and when the rotating shaft 32 is detached, either the bearing upper portion (bearing portion 11) or the bearing lower portion (bearing portion 12) is provided. It is preferable that one of them bends.

According to the above configuration, the rotating shaft can be easily detached while appropriately supporting the rotating shaft.

In the seventh aspect, the lid opening / closing mechanism according to the eighth aspect of the present invention restricts the movement of the upper part of the bearing (bearing portion 11) on the surface supporting the rotating shaft 32 in the direction in which the rotating shaft 32 is detached. A first protrusion (protrusion 11a) for the purpose is formed, and the surface of the lower part of the bearing (bearing portion 12) that supports the rotation shaft 32 is for restricting the movement of the rotation shaft 32 in the direction of detachment. The second protrusion (projection 12a) is formed, and the distance (height) D1 from the apex of the first protrusion (projection 11a) to the line passing through the axis center x of the rotation axis 32 is higher than the second. It is preferable that the distance (height) D2 from the apex of the protrusion (projection 11a) to the line passing through the axis center x of the rotation shaft 32 is larger.

According to the above configuration, when the lid is removed, the rotating shaft is easily guided to the lower portion side of the bearing, so that the lid can be easily removed.

In the lid opening / closing mechanism according to the ninth aspect of the present invention, in any one of the first to eighth aspects, the guide space for guiding the rotating shaft 32 in the detaching direction is located below the bearing portions 11 and 12. It is preferable to do so.

According to the above configuration, when the lid is attached, it becomes easy to insert the shaft into the guide space, and the bearing portion can firmly support the shaft.

The air conditioner according to the tenth aspect of the present invention is characterized by comprising the lid opening / closing mechanism according to any one of the above aspects 1 to 9.

The lid opening / closing mechanism of the present invention is suitable for an indoor unit of an air conditioner as an air conditioner, but is not limited to this, and may be applied to an air purifier. Further, it can be applied to any device as long as it is a device that opens and closes the lid and requires the lid to be removed.

Further, in the present embodiment, the indoor unit of the air conditioner provided with the filter cleaning device has been described, but the present invention can also be applied to the indoor unit of the air conditioner not provided with the filter cleaning device. At that time, the filter can be attached / detached by opening the front panel. In other words, in an air conditioner indoor unit that does not have a filter cleaning device, FIG. 3 may be read as a filter attached / detached state. Of course, if the device has a detachable component (for example, a device such as an electrostatic precipitator or an ion generation unit) other than the dust box and the filter, FIG. 3 may be read as the component detached state. A state in which a dust box, a filter, and a detachable part can be attached and detached may be referred to as a component attachment / detachment state.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention. Further, by combining the technical means disclosed in each embodiment, new technical features can be formed.

1 Indoor unit 10 Main body (housing)
10a Front surface 11 Bearing part (upper part of bearing)
11a Protrusion 12 Bearing (lower part of bearing)
12a Protrusion 13 Stopper receiving part (fixed support bearing part)
13a Contact surface 13b Top 20 Front panel (closure)
30 Closure opening / closing mechanism 31 Arm 32 Rotating shaft 32a Outer peripheral surface 33 Stopper (fixed support shaft)
33a Outer peripheral surface 40 Dust box 130 Cover opening / closing mechanism 132 Rotating shaft 133 Stopper (fixed support shaft)
213 Stopper receiving part (fixed support bearing part)
230 Closure opening / closing mechanism 232 Rotating shaft 233 Stopper (fixed support shaft)
330 Closure opening / closing mechanism 332 Rotating shaft 333 Stopper (fixed support shaft)
430 Closure opening / closing mechanism 432 Rotating shaft 433 Stopper (fixed support shaft)
433a rib

Claims (7)

It is a lid opening / closing mechanism that opens / closes the lid that is detachably attached to the housing.
The support member that supports the lid on one end side and
A rotating shaft provided on the support member, rotatably supported by a bearing portion formed in the housing, and in a state of being detachable from the bearing portion when rotated by a predetermined angle.
The receiving part provided in the above housing and
The lid is provided on the support member, and the lid is engaged with the receiving portion at a fixed support position while rotating about the rotation axis by the predetermined angle, so that the rotating lid is provided at another predetermined angle. With a fixed support part that is fixedly supported by
The receiving portion has a convex shape protruding in a direction perpendicular to the axial direction of the rotating shaft.
In the process of rotating from the closed position of the lid to the fixed support position, the surface of the receiving portion that the fixed support portion contacts is a position that is in contact at the fixed support position from the position where the first contact portion is made in the process. It is a sloping surface whose height increases toward the top.
The rotating shaft is in contact with the bearing surface of the bearing portion while the rotating surface of the rotating shaft is in contact with the bearing surface of the bearing portion from the closed position of the lid to the position where the lid can be detached beyond the fixed support position by the fixed support portion. A rotating lid opening / closing mechanism. The lid opening / closing mechanism according to claim 1, wherein the position of the fixed support portion at the fixed support position is displaced toward the detachable position side of the lid with respect to an axis extending in the vertical direction from the rotation axis. The rotating shaft has a plane formed on the outer peripheral surface supported by the bearing portion so as to be parallel to the direction in which the rotating shaft separates from the bearing portion.
The lid opening / closing mechanism according to claim 1 or 2, wherein the plane formed on the rotating shaft is located at a position where the lid can be detached, on the side opposite to the contact direction of the outer peripheral surface of the bearing portion. The bearing portion includes an upper portion of the bearing that supports the rotating shaft from above and a lower portion of the bearing that supports the rotating shaft from below.
The lid opening / closing mechanism according to any one of claims 1 to 3, wherein either the upper part of the bearing or the lower part of the bearing bends when the rotating shaft is disengaged. A first protrusion for restricting the movement of the rotating shaft in the direction of detachment is formed on the surface of the upper part of the bearing that supports the rotating shaft.
A second protrusion for restricting the movement of the rotating shaft in the direction of detachment is formed on the surface of the lower part of the bearing that supports the rotating shaft.
4. The distance from the apex of the second protrusion to the line passing through the axis center of the rotating shaft is larger than the distance from the apex of the first protrusion to the line passing through the axis center of the rotating shaft. The lid opening / closing mechanism described in. The lid opening / closing mechanism according to any one of claims 1 to 5, wherein the guide space for guiding in the direction away from the rotating shaft is located below the bearing portion. An air conditioner provided with the lid opening / closing mechanism according to any one of claims 1 to 6.

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