CN110312901B

CN110312901B - Cover opening and closing mechanism and air conditioner

Info

Publication number: CN110312901B
Application number: CN201780053460.2A
Authority: CN
Inventors: 浜口理
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2017-02-27
Filing date: 2017-07-11
Publication date: 2022-03-11
Anticipated expiration: 2037-07-11
Also published as: JPWO2018154807A1; JP7088903B2; CN110312901A; WO2018154807A1

Abstract

The cover can be smoothly attached to, detached from, and opened and closed to the housing, and the occurrence of abnormal noise when the cover is attached to, detached from, and opened and closed to the housing can be suppressed. In the cover opening/closing mechanism (30), a rotating shaft (32) is formed on an arm (31) for supporting a front panel, and the rotating surface of the rotating shaft (32) is in close contact with and rotates around a bearing receiving surface of a bearing part (11, 12) during a period from a closing position of the front panel to a detachable position of the front panel through a fixed supporting position of a stopper (33).

Description

Cover opening and closing mechanism and air conditioner

Technical Field

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

Background

In a typical air conditioner, a front panel provided on the front surface of an indoor unit is opened to remove a filter or the like of the indoor unit. At this time, the front panel is maintained in an opened state at a fixed angle with respect to the indoor unit. In the air conditioner, the front panel is detached from the indoor unit main body in order to detach the blower fan, the fan motor, and the like of the indoor unit.

For example, patent document 1 discloses an air conditioner including a front panel that can be opened and closed by a support shaft that is detachably supported in a shaft hole of a main casing of an indoor unit, and that is detachable from the main casing in a state where the front panel is opened at a fixed angle with respect to the main casing.

Prior Art

Patent document

Patent document 1: japanese laid-open patent publication No. Hei 8-135994 (published 5/13 1996) "

Disclosure of Invention

Problems to be solved by the invention

In patent document 1, when the front panel is opened by rotating the front panel with respect to the main body casing, the front panel is held open at a fixed angle by a projection provided on an arm for supporting the front panel spanning the projection provided on the main body casing. Further, when the front panel is opened in this state, the projection provided on the arm straddles another projection provided on the main body casing, and the front panel is in a state of being opened at a fixed angle, and is detachable from the main body casing. The step of mounting the detached front panel to the main body case is reverse to the above-described step.

As described above, in patent document 1, in order to maintain the open state of the front panel and to make it detachable, the projection provided on the arm of the front panel needs to span over a plurality of projections provided on the main body casing. Therefore, in order to firmly hold the front panel in the open state, it is necessary to make the span between the protrusions tight. However, if the span between the protrusions is made too tight, the frictional force between the protrusions becomes large, making it difficult to mount, dismount, and open and close the front panel, further causing problems such as abnormal noise at the time of mounting, dismounting, and opening and closing.

Further, when the spanning between the protrusions is loosened, the frictional force between the protrusions becomes small, the front panel can be easily mounted, dismounted, and opened and closed, and further, it is possible to suppress the occurrence of abnormal noise when mounting, dismounting, and opening and closing the front panel, however, it is difficult to hold the front panel at a fixed angle with respect to the main body casing, and the front panel may also fall off from the main body casing.

An object of an aspect of the present invention is to provide a cover opening and closing mechanism which can smoothly attach, detach, and open and close a front panel to a main body casing and which can suppress occurrence of abnormal noise when attaching, detaching, and opening and closing the front panel to the main body casing.

Means for solving the problems

In order to solve the above problem, a lid opening and closing mechanism according to an aspect of the present invention is a lid opening and closing mechanism for opening and closing a lid detachably attached to a housing, the lid opening and closing mechanism including: a support member for supporting the cover; a rotating shaft which is provided on the support member, is rotatably supported by a bearing portion formed in the housing, and is in a state of being detachable from the bearing portion when rotated by a predetermined angle; and a fixed support shaft that is provided on a support member and that fixedly supports the rotating cover at another predetermined angle while the rotating shaft rotates at the predetermined angle, wherein a rotating surface of the rotating shaft rotates in contact with a bearing surface of the bearing portion while the rotating shaft spans from a closed position of the cover to a detachable position of the cover in accordance with a fixed support position of the fixed support shaft.

Effects of the invention

According to an aspect of the present invention, the following effects can be obtained: the cover can be smoothly attached to, detached from, and opened and closed to the housing, and the occurrence of abnormal noise when the cover is attached to, detached from, and opened and closed to the housing can be suppressed.

Drawings

Fig. 1 is a schematic perspective view of an air conditioner according to a first embodiment of the present invention.

Fig. 2 is a schematic sectional view illustrating a state in which a front panel of the air conditioner shown in fig. 1 is closed.

Fig. 3 is a schematic sectional view illustrating a state where a front panel of the air conditioner shown in fig. 1 is opened to a position where a dust box is attachable and detachable.

Fig. 4 is a schematic cross-sectional view illustrating a state where a front panel of the air conditioner shown in fig. 1 is opened to a position where the front panel is detachably attached.

Fig. 5 is a diagram for explaining the operation of the cover opening and closing mechanism in a state where the front panel shown in fig. 3 (b) is opened to a position where the dust box can be attached and detached.

Fig. 6 is a diagram for explaining adjustment of the attaching and detaching strength of the front panel. Fig. 7 is a diagram for explaining adjustment of the holding strength of the front panel.

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

Fig. 9 is an enlarged view of a main portion H of fig. 8.

Fig. 10 is a view showing an example in which a rib is provided on the back surface of the stopper receiver.

Fig. 11 is a schematic configuration diagram of a cover opening and closing mechanism according to a second embodiment of the present invention.

Fig. 12 is a schematic configuration diagram of a cover opening and closing mechanism according to a third embodiment of the present invention.

Fig. 13 is a schematic configuration diagram of a cover opening and closing mechanism according to a fourth embodiment of the present invention.

Fig. 14 is a schematic configuration diagram of a cover opening and closing mechanism according to a fifth embodiment of the present invention.

Detailed Description

[ first embodiment ]

Embodiments of the present invention are described below. In the present embodiment, an indoor unit of a split type air conditioner mounted on an indoor wall surface will be described as an example of a device to which the cover opening/closing mechanism of the present invention is applied.

(schematic configuration of indoor Unit)

Fig. 1 is a perspective view showing an external appearance of an indoor unit of an air conditioner (air conditioner), where (a) shows a state where a front panel (cover) 20 is closed, and (b) shows a state where the front panel 20 is opened.

As shown in fig. 1, the indoor unit 1 includes: a main body (housing) 10; a front panel 20 covering a front of the main body 10; and a cover opening and closing mechanism 30 for supporting the operation of the front panel 20 so as to open and close the front face 10a of the main body 10.

Although not shown, the main body 10 includes, inside thereof: various components such as a blower (for example, a cross flow fan or a propeller fan) and a heat exchanger that should be provided in the indoor unit 1 of the air conditioner. In the present embodiment, the description of these various members is omitted.

The main body 10 is provided with a dust box 40 on the front. The dust box 40 is one of constituent components of the filter cleaning device provided in the main body 10. The filter cleaning device removes dust, etc., adhered to the filter, and accumulates in the dust box 40. The dust box 40 is detachably provided to the main body 10.

The front panel 20 is provided to be rotatable with respect to the main body 10 to be in a front closed state of the main body 10 shown in fig. 1(a) and in an open state of the front 10a of the main body 10 shown in fig. 1 (b). When the front panel 20 is in the opened state shown in fig. 1(b), the user mounts and removes the dust box 40 from the front 10a of the main body 10. In a state where the dust box 40 is removed, the filter is also removable.

When the front panel 20 is further opened from the opened state shown in fig. 1(b), that is, when the front panel 20 is rotated at a predetermined angle in the opening direction with reference to the state in which the front panel 20 is closed, the front panel 20 is detachable from the main body 10. That is, the front panel 20 is configured to take the following three stage states: a closed state shown in fig. 1(a), an open state shown in fig. 1(b), and a state where the front panel 20 is further opened and can be attached and detached. The above-described three stages of opening and closing of the front panel 20 are achieved by the cover opening and closing mechanism 30.

In the state shown in fig. 1(b), the opening angle of the front panel 20 with respect to the main body 10 is about 90 °. However, the opening angle is not limited to 90 °, and the opening angle of the front panel 20 may be any angle as long as the user can perform maintenance such as attachment and detachment of the dust box 40 to and from the main body 10. The opening angle at the time of attaching and detaching the front panel 20 may be slightly larger than the opening angle shown in fig. 1(b), and may be any angle as long as the front panel 20 can be attached and detached.

(overview of the lid opening/closing mechanism 30)

Fig. 2 is a diagram for explaining the operation of the cover opening/closing mechanism 30 when the front panel 20 is in the closed state, where (a) is a schematic diagram of the cross section of the main body 10, and (b) is an enlarged view of a main part of (a).

Fig. 3 is a diagram for explaining the operation of the cover opening/closing mechanism 30 in a state where the front panel 20 is opened to a position where the dust box 40 can be attached/detached, (a) is a schematic diagram of a cross section of the main body 10, and (b) is an enlarged view of a main part of (a).

Fig. 4 is a diagram for explaining the operation of the cover opening/closing mechanism 30 in a state where the front panel 20 is opened to a position where the front panel 20 is detachable, (a) is a schematic diagram of the cross section of the main body 10, and (b) is an enlarged view of a main part of (a).

The front panel 20 is supported by the cover opening/closing mechanism 30 to be rotatable about a rotation shaft 32 (described later) in the directions of arrows X and Y. That is, the front panel 20 is rotated slightly in the direction of the arrow X from the position (closed position) in the closed state shown in fig. 2a, is temporarily fixed and supported at the position (fixed and supported position) in the state where the dust box 40 is attached and detached shown in fig. 3a, is further rotated in the direction of the arrow X and is further opened, and is rotated to the position (detachable position) in the state where the front panel 20 is attached and detached shown in fig. 4 a. The front panel 20 rotates in the arrow Y direction from the state shown in fig. 4(a), passes through the state shown in fig. 3(a), and becomes the closed state shown in fig. 2 (a). Here, the closed state refers to a state in which the front surface of the main body 10 of the indoor unit 1 is closed by the front panel 20. In general, air conditioning such as cooling and heating of an air conditioner is performed in the closed state of the front panel 20. The state where the dust box 40 is detachable means a state where the front panel 20 is opened to the extent that the dust box 40 and the filter provided in the main body 10 are detachable from the main body 10. Further, the state in which the front panel 20 is detachable means a state in which the front panel 20 is opened more than a state in which the dust box 40 is detachable, and the front panel is detachable with respect to the main body 10.

As described above, the cover opening/closing mechanism 30 is a mechanism for rotatably supporting the front panel 20 with respect to the main body 10, and includes: an arm (support member) 31 for supporting the front panel 20; a cylindrical rotating shaft 32 provided in the arm 31, rotatably supported by a bearing portion (upper bearing portion) 11 and a bearing portion (lower bearing portion) 12 formed in the body 10, and configured to be detachable from the bearing

portions

11 and 12 when rotated to a predetermined angle; and a stopper (fixed support shaft) 33 provided on the arm 31, engaged with the stopper receiving portion 13 formed on the body 10 while the rotation shaft 32 rotates at the predetermined angle, and fixedly supporting the rotating front panel 20 at the predetermined angle.

The bearing portion (upper bearing portion) 11 and the bearing portion (lower bearing portion) 12 are disposed opposite to each other, and vertically sandwich the rotating shaft 32 to rotatably support the rotating shaft 32. Both the bearing

portions

11, 12 are made of a member having elasticity, such as resin. In the present embodiment, the bearing portion 12 has a bent structure, and the bearing portion 11 has an unbent structure (has unbent strength at least when the rotary shaft 32 is attached and detached). The bearing portion 11 may have a curved structure, and the bearing portion 12 may have a non-curved structure. Here, the bearing portion 11 has an arc-shaped shaft upper side bearing surface for receiving the outer peripheral surface 32 of the cylindrical rotating shaft. When the rotary shaft 32 is in the closed state of the front panel 20 (see fig. 2 (b)), the shaft upper side support surface is located forward and upward from directly above the rotary shaft 32 to the center of the rotary shaft 32 (however, below the tangent line contacting directly above the rotary shaft 32). Here, the front refers to a direction in which the front panel 20 is detached from the main body 10. Note that the upper direction is a direction opposite to the vertical direction (gravity direction) of the main body 10. The bearing portion 12 has an arc-shaped shaft lower side bearing surface for receiving the outer peripheral surface 32 of the cylindrical rotating shaft. When the rotary shaft 32 is in the closed state of the front panel 20 (see fig. 2 (b)), the shaft lower support surface is located forward and downward from directly below the rotary shaft 32 to the center of the rotary shaft 32 (however, above the tangent line contacting directly below the rotary shaft 32). Thus, until the removal, the rotary shaft 32 is in close contact with the upper shaft-side support surface of the bearing portion 11 and the lower shaft-side support surface of the bearing portion 12. In addition, the bearing

portions

11 and 12 are formed with a projection (first projection) 11a and a projection (second projection) 12a on a surface supporting the rotary shaft 32, respectively, for restricting the movement of the rotary shaft 32 in the direction of taking out the front panel 20 (the direction of taking out the front panel 20 from the main body 10). The projection 11a is an arc-shaped projection extending from the front end of the shaft upper support surface to the front side. The protrusion 12a has a surface extending in the horizontal direction from the front end of the shaft lower support surface, and is configured by a surface extending forward from the front end of the surface. The

projections

11a and 12a regulate the movement of the rotary shaft 32 in any state of the closed state shown in fig. 2 (b), the state of the dust box 40 attachable and detachable shown in fig. 3 (b), and the state of the front panel 20 attachable and detachable shown in fig. 4 (b). However, in a state shown in fig. 4 (b) where the front panel or the like is removed, the front panel is moved in the arrow Z direction, so that the bearing portion 11 is not bent and the bearing portion 12 is bent according to the movement of the rotary shaft 32, and the rotary shaft 32 is moved over the

protrusions

11a and 12 a. The guide spaces on the right side of the

projections

11a and 12a are wider than the bearing

portions

11 and 12 on the left side of the

projections

11a and 12a in the vertical direction. Thus, when the front panel is mounted, the shaft can be easily inserted into the guide space, and the bearing

portions

11 and 12 can firmly support the shaft. The guide space is located below the bearing

portions

11 and 12. Therefore, when the front panel 20 is mounted, the rotation shaft easily contacts the bearing 12, and the bearing 12 is easily bent and easily mounted. Further, of the distance D1 from the apex of the protrusion 11a to the line passing through the axis center x and the distance D2 from the apex of the protrusion 12a to the line passing through the axis center x, the distance D2 is large (see fig. 6). By so doing, when the front panel 20 is detached, the rotary shaft 32 is more easily guided to the bearing portion 12 side.

As shown in fig. 2 (b), in the present embodiment, the rotary shaft 32 is cylindrical, and a part of the outer peripheral surface 32a is flat. This flat surface is referred to as D- section 32a 1. The remaining surface of the outer peripheral surface 32a is the circumferential surface 32a 2. As shown in fig. 4 (b), the rotary shaft 32 is formed such that, in a state where the front panel 20 is removed, the rotary shaft 32 rotates the D-section 32a1 to a position facing the bearing portion 12. Thereby, the rotary shaft 32 easily passes over the projection 12a of the bearing portion 12 through the D- section 32a 1. Here, the bearing portion 11 has no spring property (has a strength that does not bend at least when the rotary shaft 32 is attached and detached), the bearing portion 12 has a spring property, and the D-section 32a1 of the rotary shaft 32 pushes down the bearing portion 12 so that the rotary shaft 32 can be detached from the bearing

portions

11, 12.

Further, since the circumferential surface 32a2 of the outer circumferential surface 32a other than the D-section 32a1 is always in close contact with the bearing portion 11, the rotating portion 32 cannot be easily detached from the bearing

portions

11, 12. In particular, in addition to the state of detaching the front panel 20 shown in fig. 4(a) and (b), since the outer peripheral surface 32a of the rotating shaft 32 is in close contact with the bearing

portions

11, 12, the rotating shaft 32 cannot be easily detached from the bearing

portions

11, 12.

Like the rotary shaft 32, the stopper 33 is formed of a member having a substantially circular cross section, and the outer peripheral surface 33a can be brought into close contact with the concave engagement surface of the stopper receiving portion 13. That is, as shown in fig. 3(a) and (b), when the dust box is detached, the stopper 33 is in close contact with the engagement surface of the stopper receiving portion 13. This can restrict the rotation of the rotary shaft 32, that is, the rotation of the front panel 20, and can enhance the holding force of the front panel 20 in the opened state at a predetermined position.

As shown in fig. 3 (b), in a state where the dust box 40 is attached and detached, the stopper receiver 13 engages with the stopper 33 formed on the arm 31. When the front panel 20 is in the closed state shown in fig. 2 (b) or in the detachable state shown in fig. 4 (b), the stopper receiver 13 and the stopper 33 are disengaged from each other.

(action of the lid closing mechanism 30)

Fig. 5 is a diagram for explaining the operation of the lid closing mechanism 30 in a state where the dust box 40 shown in fig. 3 (b) is attached and detached.

The engagement position at which the stopper 33 is engaged with the stopper receiving portion 13 is shifted in the direction of removal (forward) of the front panel 20 from a straight line (axis line) extending in the vertical direction (gravitational direction) from the rotary shaft 32. In this case, the engagement position is a position where a straight line extending in the vertical direction from the rotation shaft 32 and a straight line from the rotation shaft 32 toward the stopper 33 are separated by an angle θ. The angle θ is preferably 15 °, but is not limited to this angle as long as it is larger than 0 °. That is, the engagement position may be a position slightly forward (in the direction of removal of the front panel 20) of a straight line extending in the vertical direction from the rotation shaft 32. When the stopper 33 is located at the engagement position, the outer peripheral surface 32a of the rotary shaft 32 is in close contact with the bearing portion 11.

As described above, since the engagement position is located forward of the straight line extending in the vertical direction from the rotation shaft 32, when the front panel 20 is detached, the stopper 33 rotates in the arrow a direction with the rotation shaft 32 as the fulcrum, and therefore, 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 located at the engagement position, the outer peripheral surface 32a of the rotary shaft 32 is in close contact with the bearing portion 11, and therefore, when the front panel 20 is in the closed state, the stopper 33 rotates in the arrow B direction about the rotary shaft 32 as a fulcrum. In this case, the engagement force between the stopper 33 and the stopper receiver 13 increases, and the rotation shaft 32 serving as the fulcrum tends to move in the arrow C direction, but the rotation shaft 32 is firmly held by the bearing portion 11, and therefore the fulcrum does not move from the rotation shaft 32. Therefore, the front panel 20 can be smoothly closed. In addition, it is possible to suppress the occurrence of abnormal noise caused by friction of the respective members, which is generated when the front panel 20 is closed. Further, by changing the angle θ, the engagement force between the stopper 33 and the stopper receiver 13 can be freely set.

In the closed state of the front panel 20 shown in fig. 2(a) and (b), the rotation shaft 32 is sandwiched between the bearing

portions

11 and 12 in a state of surface close contact, and therefore the front panel 20 is reliably fixed. Even if the front panel 20 is forcibly opened further from (a) and (b) of fig. 4, the front panel 20 is easily detached when the state shown in (a) and (b) of fig. 4 is rotated in the direction of arrow X or more, and the opening and closing mechanism of the front panel 20 is not broken.

(adjustment according to the engaging force of the lid opening/closing mechanism 30)

Fig. 6 is a diagram for explaining C in fig. 5.

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

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

Fig. 9 is an enlarged view of a main portion H of fig. 8.

In the detached state of the front panel 20 shown in fig. 4(a) and (b), the detachment strength (detachment hardness) of the front panel 20 can be easily adjusted by adjusting a distance D2, which is a distance from the axial center X of the rotary shaft 32 to a D-section 32a1 of the outer peripheral surface 32a of the rotary shaft 32, and a height E, which is a position of a slit (not shown) of the bearing portion 12, as shown in fig. 6.

In the dust box detached state shown in fig. 3(a) and (b), the engaging force and the engaging hardness of the stopper 33 can be easily adjusted by adjusting the distance G from the bottom surface of the contact surface 13a of the stopper receiving portion 13 to the ceiling portion 13b and the height F from the position of the slit (not shown) of the stopper receiving portion 13 as shown in fig. 7.

For example, as shown in fig. 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, F is increased, the bearing portion 12 and the stopper receiver 13 are easily bent, thereby weakening the detachment strength of the front panel 20. In contrast, if E, F is lowered, the bearing portion 12 and the stopper receiving portion 13 are not easily bent, thereby enhancing the detachment strength of the front panel 20.

As shown in fig. 10,

ribs

103, 103 may be provided on the back surface of the stopper receiver 13, and the removal strength of the front panel 20 may be adjusted by adjusting the heights of the

ribs

103, 103. In this case, if the height of the

ribs

103, 103 is higher, the stopper receiving portion 13 is less likely to bend, and therefore the detachment strength of the front panel 20 is enhanced.

The following effects are obtained by the above constitution: the firmness of the front panel 20 when it is mounted and removed can be easily adjusted, the holding force when the front panel 20 is temporarily fixed (when the dust box is removed) can be easily adjusted, and the abnormal noise when the front panel 20 is mounted and removed can be reduced.

Further, by changing the shape of the rotation shaft 32 and the shape of the stopper 33, a cover opening and closing mechanism that achieves various effects can be realized. This point will be explained in the following second to fifth embodiments.

[ second embodiment ]

Another embodiment of the present invention is explained as follows. For convenience of explanation, members having the same functions as those described in the above embodiments are given the same reference numerals, and explanations thereof are omitted.

Fig. 11 is a diagram for explaining an operation of the dust box detached state in the cover opening and closing mechanism 130 according to the present embodiment.

The lid opening/closing mechanism 130 is basically the same as the lid opening/closing mechanism 30 of the first embodiment, and is different in the cross-sectional shape of the rotation shaft 132. As shown in fig. 11, the cross-sectional shape of the rotary shaft 132 is a circle without a D-section. That is, as described above, the rotary shaft 132 has a substantially circular cross section, and the outer peripheral surface (rotary surface) of the rotary shaft 132 is formed in a shape that can be brought into close contact with the bearing surfaces (upper shaft support surface and lower shaft support surface) of the rotary shaft 132 of the bearing

portions

11 and 12. The stopper 133 has the same shape as the stopper 33 of the lid opening and closing mechanism 30 of the above-described embodiment, and has a circular cross-sectional shape.

Since the D-section is eliminated from 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, and therefore, even in a state where the front panel 20 is removed, the adhesion force between the rotary shaft 132 and the bearing portion 12 increases by the amount corresponding to the rotary shaft 132 having no D-section, and the press strength of the front panel 20 can be improved. That is, it is possible to prevent the front panel 20 from being easily detached from the main body 10.

[ third embodiment ]

Fig. 12 is a diagram for explaining an operation in a dust box detached state in the cover opening and closing mechanism 230 according to the present embodiment.

The lid opening/closing mechanism 230 is basically the same in 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 sectional shape of the stopper 233 is a shape having a D section. The rotary shaft 232 has a circular cross-sectional shape with a D cross-section, similar to the rotary shaft 32 of the lid opening and closing mechanism 30 of the first embodiment.

In the present embodiment, the contact surface between the stopper receiver 213 and the stopper 233 is a planar surface. Thus, in a state where the dust box is detached from the front panel 20, the D-section of the stopper 233 and the contact surface of the stopper receiving portion 213 can be opposed to each other and brought into close contact with each other.

This allows the front panel 20 to be stably opened in a state where the dust box is removed from the front panel 20. That is, by adjusting the inclination of the contact surface when the D-section of the stopper 233 is in close contact with the abutment surface of the stopper receiver 213, the opening and closing angle of the front panel 20 can be kept constant.

As described with reference to fig. 6 of the first embodiment, the removal strength (firmness of removal) of the front panel 20 can be easily adjusted by adjusting the distance between the axial center X of the rotary shaft 232 and the D-section and the height at which the position of the slit (not shown) of the stopper receiving portion 13 is adjusted.

[ fourth embodiment ]

Fig. 13 is a diagram for explaining an operation in a state where the dust box is detached in the cover opening/closing mechanism 330 according to the present embodiment.

The lid opening/closing mechanism 330 is basically the same as the lid opening/closing mechanism 30 of the first embodiment, but is different in the shape of the rotation shaft 332 and the stopper 333. As shown in fig. 13, the rotational shaft 332 is circular without a D-section. Like the stopper 233 of the third embodiment, the stopper 333 has a D-sectional shape.

In the present embodiment, as in the third embodiment, the contact surface between the stopper receiver 213 and the stopper 333 has a planar shape. Specifically, of the stopper 333, a plane parallel to the direction in which the stopper 333 is separated from the stopper receiving portion 213 is formed on the outer peripheral surface supported by the stopper receiving portion 213, and faces the upper surface of the stopper receiving portion 213 at the separable position of the front panel 20.

Thereby, the stopper 233 can be brought into close contact with the surface of the stopper receiving portion 213. Thus, by adjusting the inclination of the contact surface, the opening and closing angle of the front panel 20 at the fixed support position can be adjusted.

Thus, by adjusting the inclination of the contact surface when the D-section of the stopper 233 is brought into close contact with the abutment surface of the stopper receiver 213, the opening and closing angle of the front panel 20 can be kept constant.

Since the D-section is eliminated from the rotary shaft 332, the outer peripheral surface of the rotary shaft 332 is always kept in close contact with the bearing

portions

11 and 12. Therefore, even in the state where the front panel 20 is removed, the adhesion force between the rotary shaft 332 and the bearing portion 12 is increased by the amount corresponding to the non-D-section of the rotary shaft 332, and the press strength of the front panel 20 can be improved.

[ fifth embodiment ]

The cover opening/closing mechanism 430 is basically the same as the structure of the cover opening/closing mechanism 30 of the first embodiment, and is different in the shape of the stopper 433. As shown in fig. 14, in the stopper 433, a rib 433a is formed at a portion facing the stopper receiving portion 213. The shape of the rotation shaft 432 is the same as the rotation shaft 32 of the lid opening/closing mechanism 30 of the above embodiment.

In the present embodiment, the contact surface between the stopper receiver 213 and the stopper 433 is a planar surface. Thus, in a state where the dust box is detached from the front panel 20, the rib 433a of the stopper 433 and the abutting surface of the stopper receiving portion 213 can be opposed to each other and brought into close contact with each other.

Thus, by adjusting the length of the projection of the rib 433a, the holding force of the front panel 20 can be easily finely adjusted in a state where the dust box is detached from the front panel 20, and the opening and closing angle of the front panel 20 can be easily finely adjusted.

[ conclusion ]

A cover opening/closing mechanism according to an aspect of the present invention is a cover opening/closing mechanism for opening and closing a cover (front panel 20) detachably attached to a housing (main body 10), and is characterized by comprising: a support member (arm 31) for supporting the cover (front panel 20); a rotary shaft 32 provided in the support member (arm 31), rotatably supported by the bearing portions 11 and 12 formed in the housing (main body 10), and configured to be detachable from the bearing portions 11 and 12 when rotated by a predetermined angle; and a fixed support shaft (stopper 33) that is provided on the support member (arm 31) and that fixedly supports the rotating cover (front panel 20) at another predetermined angle while the rotating shaft 32 rotates by the predetermined angle, wherein the rotating surface of the rotating shaft 32 rotates so as to contact the bearing surfaces of the bearing portions 11 and 12 while the rotating shaft 32 moves from a closed position (position where the front panel is in a closed state) of the cover (front panel 20) to a detachable position (position where the front panel 20 is in a detachable state) of the cover (front panel 20) from a fixed support position (position where the dust box 40 is in a detachable state) of the fixed support shaft (stopper 33).

According to the above configuration, the rotation shaft of the lid is in close contact with the bearing portion surface provided in the housing during a period from the closed position of the lid to the detachable position of the lid across the support position of the fixed support shaft, so that the rotation center (fulcrum) of the lid is always the rotation shaft, and the fulcrum does not move from the rotation shaft, so that the opening and closing of the lid are smooth.

Thereby, the cover can be smoothly attached to, detached from, and opened and closed to the housing, and the occurrence of abnormal noise when the cover is attached to, detached from, and opened and closed to the housing can be suppressed.

In the cover opening/closing mechanism according to the second aspect of the present invention, as in the first aspect described above, the position of the fixed support shaft (stopper 33) in the fixed support position can be shifted toward the detachable position side of the cover (front panel 20) with respect to the axis extending in the vertical direction from the rotary shaft 32.

According to the above, the position of the fixed support shaft in the fixed support position is deviated to the detachable position side of the cover with respect to the axis extending in the vertical direction from the rotary shaft, whereby the fixed support shaft can be easily moved from the fixed support to the detachable position of the cover. On the other hand, from the fixed support position to the closing position of the cover, it is necessary to slightly apply a load to the rotation of the cover across the axis extending in the vertical direction from the rotating shaft, and the rotating shaft attempts to move in the direction opposite to the rotating direction of the cover. Therefore, the cover can be stably opened and closed.

In the cover opening/closing mechanism according to the third aspect of the present invention, as in the first or second aspect described above, the rotating shaft 32 may have a flat surface formed on the outer peripheral surface 32a supported by the bearing

portions

11 and 12 in parallel with the direction in which the rotating shaft 32 is disengaged from the bearing

portions

11 and 12, and the flat surface formed on the rotating shaft 32 may be located on the opposite side of the close contact direction with the outer peripheral surface 32a of the bearing

portions

11 and 12 in the detachable position of the cover (front panel 20).

According to the above configuration, the plane formed on the rotary shaft is located on the opposite side of the close contact direction with respect to the outer peripheral surface of the bearing portion in the detachable position of the cover, whereby the rotary shaft can be smoothly detached from the bearing portion when the cover is detached from the detachable position of the cover. Thus, when the cover is opened to the detachable position, the cover is easily detached from the housing.

In the lid opening/closing mechanism according to the fourth aspect of the present invention, as in any one of the first to third aspects, the rotary shaft 132 may have a substantially circular cross section, and the rotary bearing receiving surfaces of the bearing

portions

11 and 12 may be formed in a shape that is in close contact with the outer peripheral surface of the rotary shaft 132.

According to the above configuration, since the rotary shaft has a substantially circular cross section and the rotary bearing receiving surface of the bearing portion is formed in a shape capable of coming into close contact with the outer peripheral surface of the rotary shaft, the outer peripheral surface of the rotary shaft is always in a state of coming into close contact with the bearing portion, and even in a state where the cover is removed, adhesion between the rotary shaft and the bearing portion can be increased by an amount corresponding to the absence of the D-section of the rotary shaft, and the press strength of the cover can be improved. That is, it can be achieved that the cover cannot be easily detached from the housing.

In the cover opening/closing mechanism according to the fifth aspect of the present invention, as in any one of the first to fourth aspects, the fixed support shaft (stopper 233) is supported by a fixed support bearing portion (stopper receiving portion 213) formed in the housing (main body 10) in the fixed support position, a flat surface parallel to a direction in which the fixed support shaft (stopper 233) is disengaged from the fixed support bearing portion (stopper receiving portion 213) is formed on an outer peripheral surface of the fixed support shaft (stopper 233) supported by the fixed support bearing portion (stopper receiving portion 213), and the flat surface formed on the fixed support shaft (stopper 233) can be opposed to an upper surface of the fixed support bearing portion (stopper receiving portion 213) in a disengageable position of the cover (front panel 20).

According to the above configuration, in the outer peripheral surface of the fixed support shaft supported by the fixed support bearing portion, a plane of the fixed support shaft parallel to the direction of disengagement of the fixed support bearing portion is opposed to the upper surface of the fixed support bearing portion in the disengageable position of the lid, whereby the fixed support shaft and the fixed support bearing portion can be brought into surface-tight contact. Thereby, by adjusting the inclination of the contact surface, the opening and closing angle of the cover at the fixed support position can be adjusted.

In the cover opening and closing mechanism according to the sixth aspect of the present invention, as in any one of the first to fourth aspects, the fixed support shaft (stopper 333) is supported by a fixed support bearing portion (stopper receiving portion 213) formed in the housing (main body 10) in the fixed support position, and at least one rib 433a protruding toward the fixed support bearing portion (stopper receiving portion 213) may be provided on an outer peripheral surface of the fixed support shaft (stopper 33) supported by the fixed support bearing portion (stopper receiving portion 213).

According to the above configuration, by providing at least one rib protruding toward the fixed support bearing portion on the outer peripheral surface of the fixed support shaft supported by the fixed support bearing portion, the distance between the fixed support shaft and the fixed support receiving portion can be adjusted by the length of the rib. That is, the adhesion between the fixed support shaft and the fixed support receiving portion and the angle of the close contact portion can be adjusted by adjusting the length of the rib. Thereby, the holding force of the cover is easily fine-adjusted in the detachable state of the cover, and the opening and closing angle of the cover is easily fine-adjusted.

In the lid opening/closing mechanism according to the seventh aspect of the present invention, as 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 rotary shaft 32 from above and a bearing lower portion (bearing portion 12) that supports the rotary shaft 32 from below, and when the rotary shaft 32 is disengaged, it is preferable that any one of the bearing upper portion (bearing portion 11) and the bearing lower portion (bearing portion 12) is bent.

According to the above configuration, the rotating shaft is appropriately supported, and the rotating shaft can be easily detached.

In the cover opening/closing mechanism according to the eighth aspect of the present invention, as in the seventh aspect, a first protrusion (protrusion 11a) for restricting movement of the rotary shaft 32 in the disengaging direction is formed on the surface of the bearing upper portion (bearing portion 11) that supports the rotary shaft 32, a second protrusion (protrusion 12a) for restricting movement of the rotary shaft 32 in the disengaging direction is formed on the surface of the bearing lower portion (bearing portion 12) that supports the rotary shaft 32, and a distance (height) D2 from a vertex of the second protrusion (protrusion 12a) to a line passing through an axial center x of the rotary shaft 32 is larger than a distance (height) D1 from a vertex of the first protrusion (protrusion 11a) to a line passing through the axial center x of the rotary shaft 32.

According to the above configuration, the rotation shaft is more easily guided to the bearing portion side when the cover is removed, and therefore the cover can be easily removed.

In the cover opening/closing mechanism according to the ninth aspect of the present invention, as in any one of the first to eighth aspects, the guide space for guiding the rotating shaft 32 in the separating direction is preferably located below the bearing

portions

11 and 12.

According to the above configuration, when the cover is attached, the shaft can be easily inserted into the guide space, and the bearing portion can firmly support the shaft.

An air conditioner according to a tenth aspect of the present invention is characterized by including any one of the cover opening and closing mechanisms according to the first to ninth aspects.

Further, although the cover opening/closing mechanism of the present invention is suitable for an indoor unit of an air conditioner as an air conditioner, the present invention is not limited thereto, and may be applied to an air cleaner. Further, any apparatus may be applied as long as it is an apparatus that needs to open and close the cover and detach the cover.

Although the present embodiment has been described using an indoor unit of an air conditioner having a filter cleaning device, the present invention can also be applied to an indoor unit of an air conditioner having no filter cleaning device. At this time, the filter can be attached and detached by opening the front panel. In other words, in the air conditioning indoor unit without the filter cleaning device, fig. 3 may be regarded as the filter attachment/detachment state. Of course, fig. 3 can be regarded as a member-attached/detached state as long as it has a detachable member (for example, an apparatus such as an electrostatic precipitator, an ion generating unit) other than the dust box and the filter. A state in which a removable member such as a dust box or a filter is removable may be referred to as a member-removable state.

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

Description of the reference numerals

1 indoor machine

10 main body (casing)

10a front face

11 bearing part (bearing upper)

11a projection

12 bearing part (lower bearing)

12a projection

13 stop bearing part (fixed bearing part)

13a contact surface

13b top part

20 front panel (cover)

30 lid opening and closing mechanism

31 arm

32 rotating shaft

32a outer peripheral surface

33 stop (fixed supporting axle)

33a outer peripheral surface

40 dust box

130 cover opening and closing mechanism

132 rotating shaft

133 stop (fixed supporting axle)

213 stop receiving part (fixed support bearing part)

230 cover opening and closing mechanism

232 axis of rotation

233 stop (fixed supporting axle)

330 cover opening and closing mechanism

332 axis of rotation

333 stop parts (fixed supporting axle)

430 cover opening and closing mechanism

432 axis of rotation

433 stop part (fixed supporting axle)

433a rib

Claims

1. A cover opening and closing mechanism for opening and closing a cover, the cover being detachably mounted to a housing, the cover opening and closing mechanism comprising:

a support member for supporting the cover;

a rotating shaft that is provided on the support member, is rotatably supported by a bearing portion formed in the housing, and is in a state of being detachable from the bearing portion when rotated by a predetermined angle; and

a cylindrical fixed support shaft provided on the support member and having a central axis parallel to an axial direction of the rotary shaft,

a fixed support bearing portion that fixedly supports the rotating fixed support shaft at another predetermined angle while the rotating shaft is rotating at the predetermined angle, a rotating surface of the rotating shaft rotating while being in contact with a bearing surface of the bearing portion during a period from a closed position of the lid to a detachable position of the lid depending on a fixed support position of the fixed support shaft,

the fixed support bearing portion is of a convex shape protruding upward,

a surface of the fixed support bearing portion, which the fixed support shaft contacts, is an inclined surface whose height increases from a rear side to a front side in a process in which the lid rotates from the closed position to the fixed support position;

at least one rib protruding toward the fixed support bearing portion is provided on an outer peripheral surface of the fixed support shaft supported by the fixed support bearing portion.

2. The lid opening and closing mechanism according to claim 1,

the position of the fixed support shaft in the fixed support position is offset to a detachable position side of the cover with respect to an axis extending in a vertical direction from the rotation shaft.

3. The cover opening and closing mechanism according to claim 1 or 2,

a flat surface parallel to a direction in which the rotary shaft is separated from the bearing portion is formed on an outer circumferential surface of the rotary shaft supported by the bearing portion,

the plane formed on the rotating shaft is located on the opposite side of the close contact direction with the outer peripheral surface of the bearing portion in the detachable position of the cover.

4. The cover opening and closing mechanism according to claim 1 or 2,

the bearing portion includes a bearing upper portion supporting the rotary shaft from an upper side and a bearing lower portion supporting the rotary shaft from a lower side,

when the rotating shaft is disengaged, either the upper portion or the lower portion of the bearing is bent.

5. The lid opening and closing mechanism according to claim 4,

a first protrusion for restricting movement of the rotary shaft in a direction of disengagement is formed on a surface of the upper portion of the bearing supporting the rotary shaft,

a second projection for restricting movement of the rotary shaft in a direction of disengagement is formed on a surface of the lower portion of the bearing supporting the rotary shaft,

a distance from a vertex of the second protrusion to a line passing through an axial center of the rotation shaft is greater than a distance from a vertex of the first protrusion to a line passing through an axial center of the rotation shaft.

6. The cover opening and closing mechanism according to claim 1 or 2,

and a guide space for guiding the rotating shaft in the disengaging direction is positioned below the bearing portion.

7. An air conditioner comprising the cover opening/closing mechanism according to any one of claims 1 to 6.