JP6051127B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator that refrigerates or stores food, drinking water, and the like, and particularly relates to a refrigerator that includes a rotary opening / closing door.

  In recent years, the capacity of household refrigerators has increased, and 600 liter class large refrigerators having a large height and width are also on the market. Furthermore, the demand is increasing due to changes in the social environment in the future, such as an increase in bulk purchases of food due to an increase in the number of housewives.

  With the increase in size of the refrigerator, the capacity of the refrigerator compartment has been increased, the rotary door attached to the refrigerator (hereinafter referred to as the rotary door) has also been increased in size, and the inner pockets have been formed to be large, resulting in many foods. Etc. can be stored. In this way, when the rotary door becomes larger, the weight of the rotary door itself increases, and when drinking water or the like is stored in the inner pocket, more weight is added. The total weight of the door will increase significantly.

  For this reason, when opening a rotary door, it is necessary to open it by applying a big force to a rotary door. Further, since the weight of the rotary door is heavy even after the rotary door is opened, the rotary door is rotated by the remaining inertial force. Therefore, the user needs to hold the rotary door by hand. Also, if the weight of the rotary door is large, if the rotary door is left open and the rotary door is not held, the rotary door is opened without permission with the inclination caused by the installed state of the refrigerator body, or There was a phenomenon that the revolving door closed without permission, and it was inconvenient for the convenience of the refrigerator, and improvement was required.

  With regard to the operation mechanism of the revolving door of the refrigerator compartment that has become larger and heavier as described above, refrigerators equipped with a door opening device that automatically opens are provided on the market. For example, Japanese Patent Application Laid-Open No. 2009-186141 (Patent Document 1) includes a mechanism capable of maintaining an open state of a revolving door of a refrigerator compartment, and friction acts when the door is opened, and the door is moved by hand. Even when not holding, the door is restrained from moving freely. Moreover, the structure which provided the door opening apparatus which opens a door with the force exceeding the resistance which arises by the friction is described.

  Japanese Unexamined Patent Application Publication No. 2009-228994 (Patent Document 2) describes a configuration in which a part having an uneven shape is provided on the lower hinge side so that the opened door does not move at a specific location.

JP 2009-186141 A JP 2009-228994 A

  By the way, in the structure described in Patent Document 1, friction starts to work immediately after the door is opened, and a large force is required when the door is manually opened. In addition, the output of the door opening device that pushes and opens the door in accordance with the resistance caused by the friction that occurs when the door is opened increases, the initial speed when the door is pushed out increases, and the impact sound increases. There is a risk of causing fear and discomfort due to sound.

  Further, in the configuration described in Patent Document 2, the door cannot be held at a place other than the engagement between the convex portion of the door stopper and the concave portion of the fixed cam, and a free state region remains between them, and the door stopper Since the convex portion and the concave portion of the fixed cam mesh with each other in the height direction of the refrigerator, an operation of applying a further force is required to open and close the door after the meshing. In addition, some other operation or mechanism for disengaging the mesh may be required, which has been a cause of poor usability.

  An object of the present invention is a novel device capable of suppressing the movement of the door in the opened state of the rotary door and maintaining the opened state of the rotary door without deteriorating the usability when the rotary door is opened. Is to provide a simple refrigerator.

  A feature of the present invention is that a hinge fitting portion provided on one side of the rotary door and a holding member provided on a hinge fixed to the refrigerator are combined, and the rotary fitting is provided between the hinge fitting portion and the holding member. A large holding force does not act on the rotary door until a predetermined opening angle of the door, and a holding mechanism is provided where a large holding force acts on the rotary door beyond this predetermined opening angle. .

  According to the present invention, it is possible to suppress the movement of the door in the opened state of the rotary door and maintain the opened state of the rotary door without deteriorating the usability when the rotary door is opened. It will be.

1 is a perspective view of a refrigerator to which the present invention is applied. It is a block diagram which shows the structure of the upper hinge part holding the rotary door which becomes one Example of this invention. It is a top view of the fitting part of the rotary door which the upper hinge part of the rotary door shown in FIG. 2 fits. It is a top view which shows the structure of the holding member of the rotary door shown in FIG. It is an expanded sectional view near the fitting part of the upper hinge part in the state where the rotary door shown in FIG. 2 is closed. It is a top view of the refrigerator in the state where the rotary door is closed. It is a top view which shows the fitting state of the upper hinge part of the state of FIG. 6A. It is a top view of the refrigerator in which a rotary door is in a predetermined open state. It is a top view which shows the fitting state of the upper hinge part of the state of FIG. 7A. It is a top view of the refrigerator in a state where the rotary door is opened to the vicinity of the vertical to the opening of the storage room. It is a top view which shows the fitting state of the upper hinge part of the state of FIG. 8A. It is a top view of the refrigerator in the state by which the rotary door was opened completely. It is a top view which shows the fitting state of the upper hinge part of the state of FIG. 9A.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments, and various modifications and application examples are included in the technical concept of the present invention. Is also included in the range.

  First, the overall configuration of the refrigerator will be described with reference to FIG. FIG. 1 is a perspective view of the refrigerator 1. The refrigerator 1 is provided with a refrigerator compartment 2, an ice making compartment 3, an upper freezer compartment 4, a freezer compartment 5 and a vegetable compartment 6, and an opening / closing door for opening and closing the front opening of each storage compartment. The refrigerator compartment doors 2 a and 2 b close the front opening of the refrigerator compartment 2, the upper freezer compartment door 4 a closes the front opening of the upper freezer compartment 4, and the ice making compartment door 3 a closes the front opening of the ice making compartment 3. The door and the freezer compartment door 5 a are doors for closing the front opening of the freezer compartment 5, and the vegetable compartment door 6 a is a door for closing the front opening of the vegetable compartment 6.

  The refrigerator compartment doors 2a, 2b are constituted by double-rotating rotary doors in which the left and right doors open to both sides around the hinges on both ends. The upper freezer compartment door 3a, the ice making compartment door 4a, the freezer compartment door 5a, and the vegetable compartment door 6a are constituted by drawer-type doors, and the drawer container in the storage chamber is pulled out together with the drawer door.

  The present embodiment is directed to this rotary door, and hinge mechanism portions are provided on both ends of the upper part of the refrigerator doors 2a and 2b, and the covers 11a and 11b are respectively attached and protected. Yes.

  Next, a specific configuration of the hinge mechanism portion according to the present embodiment provided on each of both end sides of the upper part of the refrigerator compartment doors 2a and 2b will be described with reference to FIGS. In addition, although the present Example provides the hinge mechanism part which becomes a present Example in each both-ends side of the upper part of the refrigerator compartment doors 2a and 2b, each both-ends side of the lower part of the refrigerator compartment doors 2a and 2b, or the upper part and lower part It may be provided in both.

  2 is a diagram showing the configuration of the upper hinge mechanism that holds the refrigerator compartment doors 2a and 2b of FIG. 1, and FIG. 3 is a diagram showing the upper hinge fitting portion of the refrigerator compartment door 2a of FIG. 4 is a view showing a holding member for holding the refrigerator door of FIG. 2, and FIG. 5 is a view showing a cross section of the upper hinge mechanism portion of FIG.

  Hereinafter, the refrigerator compartment door 2a will be described, but the opposite refrigerator compartment door 2b also has the same symmetrical structure, and a description thereof will be omitted because it is redundant.

  The refrigerator compartment door 2a is rotatably supported by an upper hinge 12 and a lower hinge (not shown) fixed to the refrigerator 1. The upper hinge 12 on the right side is formed of a steel plate, and is provided with a cylindrical portion 12a. The cylindrical portion 12a is a hollow cylindrical portion of the holding member 13 formed of a synthetic resin such as polyacetal resin. 13d. (Details of the holding member 13 will be described with reference to FIG. 4.) That is, the upper hinge fitting portion 14 provided in the refrigerator compartment door 2a has an upper hinge cylindrical portion 12a and a hollow cylindrical portion 13d of the holding member 13. Will be placed. Further, the positioning projections 13e of the holding member 13 are engaged with the positioning holes 12b provided in the upper hinge 12, whereby the upper hinge 12 and the holding member 13 are configured to rotate integrally.

  In this embodiment, the hinge fitting portion 14 provided on one side of the refrigerator compartment door 2a and the holding member 13 provided on the hinge 12 fixed to the refrigerator 1 are combined, and the hinge fitting portion 14 and the holding fitting are combined. A large holding force does not act on the refrigerator compartment door 2a between the members 13 up to a predetermined opening angle of the refrigerator compartment door 2a. If this predetermined opening angle is exceeded, a large holding force acts on the refrigerator compartment door 2a. There is a feature in that a holding mechanism is provided.

  Hereinafter, this holding mechanism will be described in detail. As shown in FIGS. 3 and 5, the diameter of the upper hinge fitting portion 14 provided in the refrigerator compartment door 2 a for accommodating the cylindrical portion 12 a of the upper hinge 12 and the hollow cylindrical portion 13 d of the holding member 13 is the largest. An upper hinge fitting hole 14c formed in a small and perfect circle, and a deformation fitting hole formed with a step portion above the upper hinge fitting hole 14c, here formed in a substantially elliptical shape It consists of a substantially elliptic hinge fitting hole 14d. Hereinafter, the deformation fitting hole will be described as a substantially elliptic hinge fitting hole 14d.

  The upper hinge fitting hole 14c pivotally supports the cylindrical portion 12a of the upper hinge 12, and the substantially elliptic hinge fitting hole 14d pivotally supports the hollow cylindrical portion 13d of the holding member 13. The opening position of the door 2a is held. The substantially elliptical hinge fitting hole 14d has a plurality of short-shaped portions having a diameter larger than that of the upper hinge-fitting hole 14c, here, a short-diameter elliptical portion 14a and a long-diameter elliptical portion 14b which is the longest-shaped portion having the largest diameter. These arcs are formed in combination.

  Here, the fitting hole formed by the long shape portion and the short shape portion does not have to be elliptical, and is not limited to the embodiment, and the essential point is a hollow cylinder of the holding member 13 described later. It only needs to have a shape that generates a frictional force in cooperation with the portion 13d.

  Thereby, the short-diameter ellipse portion 14a and the long-diameter ellipse portion 14b form one substantially elliptical deformation fitting hole. In addition, the short diameter ellipse part 14a, the long diameter ellipse part 14b, and the upper hinge fitting hole 14c are formed concentrically, and the arc of the broken line is a virtual line of the short diameter ellipse part 14a. As can be seen, the major axis ellipse 14b is larger than the minor axis ellipse 14a.

  As shown in FIGS. 4 and 5, the hollow cylindrical portion 13d of the holding member 13 attached to the upper hinge 12 is a holding member cylindrical fitting portion 13c formed in a perfect circle so as to accommodate the upper hinge cylindrical portion 12a. It has. The holding member cylindrical fitting portion 13c is a deformed hollow cylindrical portion having a predetermined thickness. This deformed hollow cylindrical portion is a substantially elliptical hollow cylindrical portion composed of a short-diameter arcuate portion 13a that is a short-shaped portion and a long-diameter arc-shaped portion 13b that is a long-shaped portion having a larger diameter than the short-diameter arcuate portion 13a. It is said that. Here, a gap S is formed so that the long diameter arcuate portion 13b can be deformed, and the long diameter arcuate portion 13b is reduced in diameter by the gap S.

  Here, the long shape portion and the short shape portion of the deformed hollow cylinder portion do not have to be arc-shaped, and the present invention is not limited to the embodiment, and the main point is friction in cooperation with the deformed hinge fitting hole 14d. It only needs to have a shape that generates force.

  Thus, the short-diameter arcuate part 13a and the long-diameter arcuate part 13b form one substantially elliptical hollow cylindrical part, and are formed concentrically. The short-diameter elliptical portion 14a and the long-diameter elliptical portion 14b of the upper hinge fitting portion 14 and the short-diameter arcuate portion 13a and the long-diameter arcuate portion 13b of the holding member 13 are all concentric. Regarding the size of each diameter, the outer diameter of 14b> 13b> 14a> 13a> 12a is approximately 13c≈14c. Since the holding member 13 is fixed to the upper hinge 12 as described above, it does not move. That is, the holding member 13 and the upper hinge 12 are moved integrally.

  In the present embodiment, the upper hinge 12, the upper hinge fitting portion 14 of the refrigerator compartment door 2a and the holding member 13 are combined in the form shown in FIG. An upper hinge cylindrical portion 12a is fitted into the hollow cylindrical portion 13d of the holding member 13, and in this state, the hollow cylindrical portion 13d is disposed in a substantially elliptical hinge fitting hole 14d of the upper hinge fitting portion 14. .

  At this time, the upper hinge cylindrical portion 12a is pivotally supported by the upper hinge fitting hole 14c so as to be a rotation shaft of the refrigerator compartment door 2a. In addition to the rotation of the refrigerator compartment door 2a, it is possible to switch the fitting strength (the magnitude of the frictional resistance) between a holding member 13 and an upper hinge fitting portion 14 which will be described later. It is possible to hold the position when it is opened. That is, the holding member 13 and the upper hinge are fitted by the interaction of the substantially elliptical hinge fitting hole 14d of the upper hinge fitting portion 14 and the long-diameter arcuate portion 13b formed in the hollow cylindrical portion 13d of the holding member 13. The holding force (= the magnitude of the frictional resistance) depending on the strength of fitting with the portion 14 can be switched.

  Next, specific operations, functions, and effects of the above configuration will be described. 6A and 6B are a top view of the refrigerator in a state where the refrigerator compartment door 2a is closed and a state of the upper hinge mechanism, and FIG. 7 is a top view of the refrigerator in which the refrigerator compartment door 2a is opened to some extent. FIG. 8 is a diagram illustrating the state of the upper hinge mechanism and FIG. 8 is a top view of the refrigerator and the state of the upper hinge mechanism in a state in which the refrigerator compartment door 2a is opened to a degree perpendicular to the box. FIG. 9 is a top view of the refrigerator and a state of the upper hinge mechanism portion in a state where the refrigerator compartment door 2a is completely opened.

  The refrigerating room door 2a of the present embodiment has different holding force (= friction resistance force) applied to the refrigerating room door 2a depending on the opening angle. The mechanism for giving the holding force is a substantially elliptical hinge fitting hole 14d of the upper hinge fitting portion 14 and a long-diameter arcuate portion 13b formed in the hollow cylindrical portion 13d of the holding member 13, whereby the holding member 13 is provided. And the upper hinge fitting portion 14 can be switched in holding force (the magnitude of frictional resistance).

  For example, from the state in which the refrigerator compartment door 2a in FIG. 6A is closed to the state in which the opening angle 31 in FIG. 7A is opened, the long-diameter elliptical portion 14b of the substantially elliptical hinge fitting hole 14d of the upper hinge fitting portion 14 The long-diameter arcuate portion 13b formed in the hollow cylindrical portion 13d of the holding member 13 faces through a gap, and a large holding force does not act on the opened refrigerating chamber door 2a, so that it can freely rotate. Can do. That is, the user can freely open and close the refrigerator compartment door 2a with a light force. In this case, the long diameter elliptical portion 14b of the substantially elliptical hinge fitting hole 14d and the long diameter arcuate portion 13b formed in the hollow cylindrical portion 13d of the holding member 13 have substantially the same diameter and are not in strong contact with each other. In short, it is only necessary that the refrigerating room door 2a can be operated with a light force without applying a large holding force to the opened refrigerating room door 2a.

  Next, as it opens from the state of the opening angle 31 shown in FIG. 7A to the opening angle 32 of FIG. 8A, the short-diameter elliptical portion 14c of the substantially elliptical hinge fitting hole 14d of the upper hinge fitting portion 14 and the holding member The long circular arc portion 13b formed in the 13 hollow cylindrical portions 13d is pressed and brought into contact with each other, and the frictional force between the two gradually increases and the holding force due to the friction increases. The holding force is maximized at the opening angle 32, and the maximum holding force continuously acts from the opening angle 32 in FIG. 8A to the maximum opening angle 33 in FIG. 9A.

  Further, details of the above-described operation will be described. First, when the refrigerator compartment door 2a is closed, as shown in FIG. 6B, the relationship between the holding member 13 and the upper hinge fitting portion 14 when the refrigerator compartment door 2a is closed is maintained. Since the long diameter arcuate portion 13b of the member 13 is within the range of the long diameter elliptical portion 14b of the upper hinge fitting portion 14 and the size of the diameter is 14b> 13b, they do not interfere with each other.

  That is, when the upper hinge 12 is attached to the refrigerator 1, the refrigerator compartment door 2a is temporarily fixed to the refrigerator 1 with a gasket (airtight packing) magnetized after being attached to the lower hinge, and then the upper hinge 12 is attached. With the above-described configuration, the upper hinge 12 does not need to be press-fitted into the upper hinge fitting portions 14 of the respective refrigerator compartment doors 2a and 2b, and the assembly workability is not affected, as is the case with the assembly without the holding member 13. There is no such thing.

  Next, in a state where the refrigerator compartment door 2a is opened by the opening angle 31, the state of the holding member 13 and the upper hinge fitting portion 14 at the opening angle 31 is as shown in FIG. ing.

  That is, a state in which the long diameter arc portion 13b formed in the hollow cylindrical portion 13d of the holding member 13 is at the boundary between the long diameter ellipse portion 14b and the short diameter ellipse portion 14a of the substantially elliptic hinge fitting hole 14d of the upper hinge fitting portion 14. It becomes. Therefore, until the opening angle 31, the long diameter arc portion 13 b formed in the hollow cylindrical portion 13 d of the holding member 13 does not interfere with the short diameter ellipse portion 14 a of the substantially elliptic hinge fitting hole 14 d of the upper hinge fitting portion 14. Therefore, there is no influence on the rotational movement of the refrigerator compartment door 2a, and the opening of the refrigerator compartment door 2a does not become heavy. Further, even when the refrigerator compartment doors 2a and 2b are provided with a closer or the like that supports the closing of the doors, it is not necessary to prepare dedicated parts.

  When the refrigerator compartment door 2a is opened to a door opening angle of 31 or less, the refrigerator compartment 2 is not so open. Therefore, the refrigerator is used in this state for taking out foods to be taken in and out from any space. It is considered that it is a clear case whether or not it is arranged, and opening and closing in a short time is predicted.

  For example, it is a case where the drink arrange | positioned in the inner side pocket of the refrigerator compartment door 2a is put in and out. In that case, the user using the refrigerator puts his / her hand on the refrigerator compartment door 2a that he / she wants to open, and the refrigerator compartment door 2a is opened and not used while the refrigerator compartment door 2a is supported without releasing the hand. It is assumed that after the food in the refrigerator compartment is taken in and out by hand, the operation of closing the refrigerator compartment door 2a opened by the hand that has been supported as it is is performed. Therefore, until the opening angle 31 of the refrigerating room door 2a, the holding of the refrigerating room door 2a by the hinge mechanism as in this embodiment is not necessary, and it is better that the rotational motion is not affected.

  Next, when the refrigerating compartment door 2a is opened to the opening angle 32 shown in FIG. 8A, the opening angle 31 of FIG. 7A is exceeded, so the long-diameter arc portion 13b formed in the hollow cylindrical portion 13d of the holding member 13 is the upper hinge. It will interfere with the short-diameter elliptical portion 14a of the substantially elliptical hinge fitting hole 14d of the fitting portion 14.

  That is, at this time, the long arc portion 13b tends to deform toward the center. However, since the upper hinge cylindrical portion 12a is disposed inside the hollow cylindrical portion 13d, the long diameter arc portion 13b is deformed by reducing the diameter so as to eliminate the gap S, and finally the gap S is eliminated. As described above, the long arc portion 13b is not deformed. Therefore, the long-diameter arc portion 13b is sandwiched between the upper hinge cylindrical portion 12a and the short-diameter elliptical portion 14a, thereby generating a frictional force. Although this refrigerating force causes the refrigerating room door 2a to rotate, its sliding form becomes heavy and becomes a resistance force, resulting in a force for holding the opened refrigerating room door 2a in that position.

  As the opening angle becomes larger than the opening angle 31 of the refrigerator compartment door 2a, the frictional force also increases, and when the opening angle 32 is reached, as shown in FIG. 8 (B), the long arc portion 13b is formed by the short oval portion 14a. Located in the range, the frictional force is maximum. That is, in the state of the open angle 32, the holding force of the refrigerator compartment door 2a is maximized. The maximum holding force of the refrigerator compartment door 2a is applied from the opening angle 32 to the maximum opening angle 33 shown in FIGS. 9A and 9B.

  The purpose of using the refrigerator in which the refrigerator compartment door 2a is opened from the opening angle 32 to the maximum opening angle 33 is to open the refrigerator compartment door 2a widely, so that a large size food can be taken in and out, and even a small number of food items can be used. It is assumed that there is going in and out. Moreover, when the refrigerator compartment door 2a of a refrigerator compartment is a double door opening like a present Example, possibility that both refrigerator compartment doors 2a and 2b will be open | released equally is high. In this state of use, it is considered that the hands are released from the opened refrigerated room doors 2a and 2b, and food and the like are put in and out of the refrigerated room using both hands. In this situation, unintentional movement of the opened refrigerating room doors 2a and 2b may cause discomfort and inconvenience for the user. Therefore, since it is necessary to hold the refrigerator compartment doors 2a and 2b opened in this state, the maximum holding force is applied.

  As described above, the holding force applied to the refrigerator compartment door 2a is changed in accordance with the opening angle of the refrigerator compartment door 2a which changes depending on the purpose of use. However, when the refrigeration room door 2a is opened from the closed state to the open angle 32 or more where the maximum holding force works, if the difference in the holding force that changes is large, the door opening / closing operation is uncomfortable. May end up. Therefore, by making the difference small and gradually changing the frictional force between the opening angles from the opening angle 31 to the opening angle 32, it is possible to consider not feeling uncomfortable. For this purpose, in this embodiment, the short-diameter elliptical portion 14a of the substantially elliptical hinge fitting hole 14d has the same diameter, but the frictional force gradually increases by gradually reducing the diameter. It may be good.

  In this embodiment, the refrigerating room door has been described as a double door type, but even in the case of a single door with a single opening, the hinge is not limited to a refrigerating room door or a freezer room door or a vegetable room door. Any rotary door can be used. Further, even when the holding member is arranged on the lower hinge instead of the upper hinge, or on both hinges, the same effect can be obtained.

  Furthermore, the same effect can be obtained when the refrigerator doors 2a and 2b are opened using an electric door opening mechanism (not shown). For example, a door opening mechanism (not shown) is provided in the ceiling of the refrigerator, and an operating member provided on the front surface of the refrigerator compartment door 2a is operated so that the pushing member protrudes from the door opening mechanism and the refrigerator compartment door 2a is opened. Can be done. At this time, the refrigerating chamber door 2a which is pushed in the opening direction by the pushing member and peeled off from the door packing and accelerated gradually decelerates at the position of the opening angle 31 where the frictional force is small, but does not stop and the frictional force is maximum. It is possible to stop by reaching the position of the opening angle 32 that is.

  That is, the relationship between the opening force of the refrigerator compartment door 2a opened by the door opening mechanism at the time of the opening angle 31 and the friction force generated in the upper hinge 12 is “opening force> friction force”, and at the time of the opening angle 32. The relationship is “opening force <frictional force”, and the holding force (frictional force) applied to the refrigerator compartment door 2a so that the refrigerator compartment door 2a opened by the door opening mechanism stops at the opening angle 32 (ie, about 90 degrees). Can be gradually changed.

  As described above, by changing the holding force applied to the refrigerator compartment door 2a so as to stop at the opening angle 32, the refrigerator door that is opened vigorously by the door opening mechanism when the side of the refrigerator is installed near the wall. Can be prevented from colliding with the wall.

  In recent years, there has been an increasing demand for refrigerators that have a high-class feeling and improved design by making the front decorative plate of the door not a steel plate but a tempered glass. Under the installation conditions as described above, when the door of the refrigerator compartment is opened vigorously by the door opening mechanism, the tempered glass member on the front side of the refrigerator compartment door is prevented from colliding with the wall so as to stop at the opening angle 32. This can be prevented by gradually changing the holding force applied to the refrigerator compartment door 2a. Moreover, the position where the refrigerator compartment door is stopped is preferably the position of the opening angle 32 in consideration of the ease of viewing the inside of the cabinet, the ease of storing and taking out food, the convenience of installation on the side of the wall, and the like.

  Furthermore, even if the door of the storage room is a double door type, a single door type, a door of a different size, or a door of another storage room such as a freezer room, a vegetable room, etc. By changing the shape of the hinge fitting hole provided in each door, the same holding member can be used and the same effect can be obtained.

  As described above, according to the present invention, the hinge fitting part provided on the rotary door and the holding member provided on the hinge are combined, and the predetermined part of the rotary door is provided between the hinge fitting part and the holding member. Until the opening angle, a large holding force does not act on the rotary door, and when the predetermined opening angle is exceeded, the rotary door is provided with a holding mechanism that applies a large holding force. It is possible to maintain the state held at the opening angle, and the usability is improved.

  DESCRIPTION OF SYMBOLS 1 ... Refrigerator main body, 2 ... Refrigeration room, 2a ... Right refrigeration room door, 2b ... Left refrigeration room door, 3 ... Ice making room, 3a ... Ice making room door, 4 ... Upper stage freezer room, 4a ... Upper stage freezer room door, 5 ... Lower freezer compartment, 5a ... Lower freezer compartment door, 6 ... Vegetable compartment, 6a ... Vegetable compartment door, 11a ... Right hinge cover, 11b ... Left hinge cover, 12 ... Right upper hinge, 12a ... Upper hinge cylindrical part , 13 ... holding member, 13a ... short diameter arc part, 13b ... long diameter arc part, 13c ... holding member cylindrical fitting part, 14 ... upper hinge fitting part, 14a ... short diameter ellipse part, 14b ... long diameter ellipse part, 14c ... upper hinge cylindrical fitting part, 31 ... opening angle, 32 ... opening angle, 33 ... opening maximum angle.

Claims (3)

In a refrigerator that includes a storage room, a rotary door that opens and closes a front opening of the storage room, and a hinge that supports the rotary door, the rotary door being opened and closed with the hinge as a rotation axis.
A holding member made of a synthetic resin provided on the hinge is accommodated and combined in a hinge fitting hole provided in the rotary door, and a predetermined part of the rotary door is provided between the hinge fitting hole and the holding member. Until the opening angle, a holding mechanism that does not act on the rotary door and a large holding force acts on the rotary door when the predetermined opening angle is exceeded,
The holding mechanism is formed in the deformation fitting hole that forms the hinge fitting hole, the upper hinge fitting hole that is smaller in diameter than the deformation fitting hole and circular, and is formed in the holding member, and is accommodated in the deformation fitting hole. And the hinge is disposed in the deformed hollow tube portion, and the hinge protruding from the deformed hollow tube portion is rotatably supported in the upper hinge fitting hole. With
The deformation fitting hole is a deformation fitting hole having a long shape portion and a short shape portion, and the deformation hollow cylinder portion is shorter than the long shape portion of the deformation fitting hole and longer than the short shape portion. And the long shape portion is a deformed hollow cylindrical portion in which a gap is formed so as to be deformable, and the deformable fitting is performed until the rotary door reaches the predetermined opening angle from the fully closed position. When the long shape portion of the fitting hole and the long shape portion of the deformed hollow cylinder portion face each other through a gap, and the rotary door exceeds the predetermined opening angle, the short shape portion of the deformation fitting hole And the long-shaped portion of the deformed hollow cylinder portion are brought into contact with each other to generate friction to provide a holding force for the rotary door . In a refrigerator that includes a storage room, a rotary door that opens and closes a front opening of the storage room, and a hinge that supports the rotary door, the rotary door being opened and closed with the hinge as a rotation axis.
A holding member made of a synthetic resin provided on the hinge is accommodated and combined in a hinge fitting hole provided in the rotary door, and a predetermined part of the rotary door is provided between the hinge fitting hole and the holding member. Until the opening angle, a holding mechanism that does not act on the rotary door and a large holding force acts on the rotary door when the predetermined opening angle is exceeded,
  The holding mechanism is formed in the deformation fitting hole that forms the hinge fitting hole, the upper hinge fitting hole that is smaller in diameter than the deformation fitting hole and circular, and is formed in the holding member, and is accommodated in the deformation fitting hole. And the hinge is disposed in the deformed hollow tube portion, and the hinge protruding from the deformed hollow tube portion is rotatably supported in the upper hinge fitting hole. With
The deformation fitting hole is a substantially elliptical substantially elliptical fitting hole having a long diameter portion and a short diameter portion, and the deformation hollow cylinder portion has a long diameter arc portion and a short diameter arc portion, and the long diameter arc portion. Is a substantially oval hollow cylinder part in which a gap is formed so as to be deformable, and the major-arc arc part of the substantially oval hollow cylinder part is shorter than the major axis of the substantially elliptical fitting hole and longer than the minor axis. Until the rotary door reaches the predetermined opening angle from the fully closed position, the major diameter portion of the substantially elliptical fitting hole and the major diameter arc portion of the substantially elliptical hollow cylindrical portion are interposed via a gap. When the rotary door exceeds the predetermined opening angle, the short diameter part of the substantially elliptical fitting hole and the long diameter arc part of the substantially elliptical hollow cylindrical part come into contact with each other to generate friction. A refrigerator that provides holding force for the rotary door. In the refrigerator according to claim 1 or 2,
The refrigerator has a plurality of rotary doors, and the rotary doors are provided with the hinge fitting holes, the holding members, and the holding mechanism, and the hinge fittings of the respective rotary doors. The refrigerator is characterized in that the joint holes have different shapes.

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