JP2006118858A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve safe door closing motion regardless of a weight of a door itself and a weight of a stored article stored inside the door with respect to a refrigerator comprising a door device for closing a front opening section of a housing by a pivoted door. <P>SOLUTION: As the refrigerator comprises the housing (refrigerator body 100) having the front opening section, a door 110 mounted on the front opening section, a connecting section (hinge 101) for rotatably connecting the door 110 with the housing 100, a self-closing function section 13 mounted at a housing 100 side and having a self-closing function, a connecting section 140 mounted at a door 110 side opposite to the self-closing function section 130, and a speed-reducing function section for reducing a closing speed of the door 110 when it is closed, the usability and safety of the door device can be improved. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a refrigerator including a door device that closes a front opening of a housing with a rotary door.

  2. Description of the Related Art In recent years, for example, some items having a revolving door, such as storage furniture and a storage, include a door device that can be self-closed in order to improve the usability of the user (for example, see Patent Document 1).

  Hereinafter, the conventional door device will be described with reference to the drawings.

  FIG. 26 is an external perspective view of a main body using a conventional door device. FIG. 27 is a perspective view of the upper part of the door device in a state where the door of the conventional door device is fully opened. FIG. 28 is an exploded perspective view of the upper part of a conventional door device. FIG. 29 is an exploded perspective view of the lower part of a conventional door device. As shown in FIGS. 26 to 29, the conventional door device 1 includes a main body 2 having a front opening 2a, an upper hinge device 3 provided at the upper portion of the main body 2, a lower hinge device 4 provided at the lower portion of the main body 2, and a closed door. Sometimes, the front opening 2a of the main body 2 is closed, and the upper hinge device 3 and the lower hinge device 4 are configured to include a door 5 rotatably connected to the main body 2.

  The upper hinge device 3 is fixed to the upper surface of the main body 2 and has an upper bracket 6 having a rotating shaft 6a, a coil spring 7 having one end fixed to the front opening 2a of the main body 2 and the other end fixed to the upper surface of the door 5, The upper collar 8 is first inserted into the cylindrical portion 8a of the upper collar 8, and then the upper collar 8 is passed through the center of the coil portion 7a of the coil spring 7 and further into the upper surface hole 5a provided on the upper surface of the door 5. By inserting, the main body 2 and the door 5 are rotatably connected.

  The coil spring 7 urges the door 5 in the closing direction when the door 5 is in the fully open position, gradually decreases the urging force as the door 5 moves in the closing direction, and further increases when the door 5 is in the closed position. It is set so that almost no energizing in the closing direction is performed.

  On the other hand, the lower hinge device 4 is fixed to the lower surface of the main body 2 and has a lower bracket 9 having a rotation shaft 9a, and a stopper fixed to the lower surface of the door 5 and abuts against the lower bracket 9 when the door 5 is fully opened to limit the opening angle of the door 5. 10 and a lower collar 11 which is disposed further below the door 5 of the stopper 10 and is fixed to the door 5 via the stopper 10 between the door 5 and the cylinder of the lower collar 11 in the hole 10a of the stopper 10 first. The portion 11 a is inserted, and the stopper 10 and the lower collar 11 are fixed to the door 5 after being inserted into the lower surface hole 5 b provided on the lower surface of the door 5. Further, the main body 2 and the door 5 are rotatably connected by inserting the rotating shaft 9 a of the lower bracket 9 fixed to the lower surface of the main body 2 into the cylindrical portion 11 a of the lower collar 11.

  In addition, the lower bracket 9 and the lower collar 11 are in contact with each other, so that the door 5 is gradually raised to a predetermined position in the middle from when the door 5 is fully opened to when the door 5 is fully opened. It has a lower cam mechanism 9b and an upper cam mechanism 11b for storing.

  Moreover, the door 5 can be rotated to about 90 ° by the stopper 10.

  About the door apparatus comprised as mentioned above, the operation | movement is demonstrated below.

  First, when the door 5 is opened from the closed position, the door 5 is gradually raised by the lower cam mechanism 9b and the upper cam mechanism 11b up to the predetermined position, and gradually accumulates the self-closing force, and reaches the predetermined position. The raising of the door 5 stops, but the lower cam mechanism 9b and the upper cam mechanism 11b maintain the self-closing force at a predetermined position.

  On the other hand, when the coil spring similarly opens the door 5 from the closed position, it gradually accumulates the force for self-closing up to about 90 ° of the fully opened position.

Therefore, when the door 5 is left in the fully opened position, the door 5 starts to be closed by the coil spring 7 first. As the door 5 rotates in the closing direction, the self-closing force of the coil spring 7 decreases, but when the door 5 reaches a predetermined position, a further self-closing force is applied by the lower cam mechanism 9b and the upper cam mechanism 11b. Thus, the door 5 can reach the closed position reliably while being gradually lowered, so that the door 5 can be self-closed at all the rotational positions.
Japanese Patent Laid-Open No. 8-312236

  However, in the above-described conventional configuration, for example, the coil spring 7, the lower cam mechanism 9b, and the upper cam mechanism 11b are arranged from the position where the door 5 is opened to the extent that the object can be taken out from the front opening 2a of the main body 2. Since the door 5 is self-closed by two self-closing forces, the self-closing speed of the door 5 is increased in the vicinity of the closed position, and there is a risk of injury by pinching the user's arm or finger between the door 5 and the front opening 2a. Had the problem of being.

  Further, when the door 5 itself is heavy, or when the door 5 becomes heavy as a result of storing an object to be stored in the door 5, the self-closing force of the coil spring 7 is reduced, but the lower cam mechanism 9b and Since the self-closing by the upper cam mechanism 11b uses gravity, the self-closing force of the door 5 is further increased and the risk of injury increases.

  This invention solves the said conventional subject, and it aims at providing the door apparatus which has a safe self-closing mechanism irrespective of the weight of the door itself, or the weight of the to-be-stored object accommodated in the door.

  In order to solve the above-described conventional problems, a refrigerator according to the present invention includes a casing having a front opening, a door provided in the front opening, and a connection for rotatably connecting the door to the casing. A self-closing function unit that performs an operation of closing the door, and a deceleration function unit that decelerates a closing speed of the door when the door is closed. A door device provided with a connection portion on the side of the door facing the self-closing function portion and operating the self-closing function by connecting the self-closing function portion and the connection portion when the door is closed. It is what you have.

  By having a deceleration function unit that operates on the door, not only when the self-closing function is operated by the self-closing function unit, but also when the door is manually closed, the weight of the door itself and the weight of the object stored in the door Regardless of this, a safe closing operation can be realized.

  The refrigerator of the present invention can realize a safe door closing operation regardless of the weight of the door itself or the weight of the stored item stored in the door.

  According to the first aspect of the present invention, there is provided a housing having a front opening, a door provided in the front opening, a connecting portion for rotatably connecting the door to the housing, and the door. A self-closing function unit that performs a closing operation; and a deceleration function unit that decelerates a closing speed of the door when the door is closed. The self-closing function unit is provided on the housing side and the self-closing function. A connecting portion is provided on the side of the door facing the portion, and the door device operates with a self-closing function by connecting the self-closing function portion and the connecting portion when the door is closed.

  As a result, the door can be closed by itself, and the door can be closed at a slow speed regardless of the weight of the door itself or the weight of the items stored in the door, improving the usability of the door device and ensuring safe door closing. Can be realized.

  In addition, the self-closing function does not operate when the door is fully opened, and the door can be manually closed at any timing, so that the stored items can be taken in and out smoothly, and the usability of the door device can be improved. it can. Moreover, the self-closing load of the self-closing function part can be reduced by operating the self-closing function only after the self-closing function part and the connection part are connected after the door is manually closed. Miniaturization and cost reduction can be achieved.

  According to a second aspect of the present invention, the self-closing function unit and the deceleration function unit are provided on the ceiling of the housing.

  As a result, the self-closing function part and the deceleration function part are in places where it is difficult for human hands to reach, and the frequency with which the person accidentally touches when putting in and out the storage can be reduced. Reliability can be improved.

  According to a third aspect of the present invention, the self-closing function portion and the deceleration function portion are provided at different locations from the connecting portion.

  Thereby, a large self-closing dimension can be obtained.

  According to a fourth aspect of the present invention, the self-closing function portion includes a movable first mechanism, and when the door is closed, the first mechanism pulls the connection portion toward the housing to cause the door to self-close. Is.

  As a result, the self-closing function part pulls in the connection part, so that the door is self-closing in the closing direction, and a large self-closing dimension can be obtained.

  According to a fifth aspect of the present invention, the connecting portion is disposed on the connecting portion side of the door with respect to the center in the width direction of the door.

  As a result, the self-closing function part and the connection part are disposed at a location away from the opening of the door, and the design of the refrigerator can be improved.

  The invention according to claim 6 is such that the front end of the first mechanism is located behind the front surface of the housing in a state where the first mechanism has moved forward.

  Thereby, the first mechanism which is a movable part does not discharge from the front surface of the housing, and the design of the refrigerator can be improved.

  In the invention according to claim 7, the connecting portion provided in the door protrudes in a convex shape toward the housing side of the door.

  Thereby, a large self-closing dimension can be obtained without impairing the design of the refrigerator.

  In the invention according to claim 8, the self-closing function portion and the connection portion are detachably coupled by a latch function.

  As a result, the self-closing force is transmitted to the door from when the self-closing function portion and the connection portion are coupled to the fully closed state, and the self-closing dimension can be increased.

  According to the ninth aspect of the present invention, the self-closing function portion and the connection portion are detachably coupled by a magnetic force.

  As a result, no reaction force is generated by the latch mechanism in the self-closing process, and forgetting to close the door can be prevented.

  In the invention according to claim 10, when the door is closed, after the self-closing function portion and the connection portion are coupled, the self-closing function portion causes the door to self-close by the self-closing force of the elastic body. is there.

  Thereby, a self-closing force can be obtained with a simple structure, and the cost of the self-closing function unit can be reduced.

  According to the eleventh aspect of the present invention, when the door is closed, the self-closing function portion and the connecting portion are connected to start the self-closing operation, and then the deceleration of the door is started by the reduction device. is there.

  As a result, if the door is closed after slowing down, the momentum of the door at the time of closing cannot be used for self-closing, so a large self-closing function is required for the self-closing function, and the self-closing function is prevented from becoming large. The safety of the door device can be improved by operating the deceleration function after the door starts to automatically close by closing.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a side sectional view of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a perspective view of an upper part of a refrigerator compartment door of the refrigerator according to the embodiment, and FIG. 3 is a lower part of the refrigerator compartment door of the embodiment. 4 is an exploded perspective view, FIG. 4 is a longitudinal sectional view of the lower part of the refrigerator door of the refrigerator according to the embodiment, FIG. 5 is a side sectional view of the lower part of the refrigerator door of the refrigerator according to the embodiment, and FIG. FIG. 7 is a cross-sectional plan view when the refrigerator compartment door of the embodiment is fully opened, and FIG. 8 is the refrigerator compartment door of the embodiment reaching the second position. FIG. 9 is a plan sectional view when the refrigerator compartment door of the embodiment has reached the first position, and FIG. 10 is a third diagram of the refrigerator compartment door of the embodiment. It is a plane sectional view at the time of reaching the position.

  In FIG. 1 to FIG. 10, a heat insulating box 21 which is a casing of the refrigerator 20 is filled with a foam heat insulating material 24 between an inner box 22 and an outer box 23, has a front opening 21a, and has a partition. The walls 25, 26, and 27 form a refrigerated room 28, a switching room 29, a vegetable room 30, and a freezer room 31 from above.

  In addition, each storage room closes the front opening 21a when closed and is connected to the heat insulation box 21 that is a casing, and is a refrigerator door 32, a switching room door 33, a vegetable room door 34, and a freezer room door 35. Is provided.

  The refrigerator compartment door 32 is rotatably connected to the heat insulating box 21 by an upper hinge 36 fixed to the heat insulating box 21 and a lower hinge 37 fixed to the partition wall 25, and the remaining switching room door 33 and vegetables are connected. The chamber door 34 and the freezer compartment door 35 are connected to the heat insulating box body 21 so as to be openable and closable forward and backward by rail members 21b fixed to both sides of the heat insulating box body 21 in each storage room.

  The upper hinge 36 has a plate-like upper hinge main body 36a fixed to the upper surface of the heat insulating box 21. A part of the upper hinge main body 36a protrudes from the front opening 21a to the refrigerator compartment door 32 side, and the protruding portion faces downward. A protruding upper rotating shaft 36b is provided.

  The upper part of the refrigerator compartment door 32 can be rotated by inserting an upper rotary shaft 36 b into an upper surface hole 32 a provided on the upper surface of the refrigerator compartment door 32.

  The lower hinge 37 is provided on the base portion 37b upward, a fixing portion 37a formed by bending a plate-like member at a substantially right angle, a fixing portion 37a parallel to the vertical direction, extending from the upper surface of the fixing portion 37a, and a substantially horizontal base portion 37b. The lower rotating shaft 37c and a cylindrical pin 37d that is located at substantially the center of the lower rotating shaft 37c and protrudes toward the fixing portion 37a from the lower rotating shaft 37c. The fixing portion 37a is switched to the refrigerator compartment door 32. The base wall 37b, the lower rotating shaft 37c, and the pin 37d protrude from the front opening 21a toward the refrigerator compartment door 32 side.

  The lower part of the refrigerator compartment door 32 includes a recess 32b provided on the lower surface of the refrigerator compartment door 32, a lower surface hole 32c provided in the recess 32b having a predetermined depth, a base 38 having a self-closing function and a deceleration function, and a cover. 39 and a spring 40.

  First, the spring 40 is inserted into the lower surface hole 32 c in parallel with the insertion direction so that the spring 40 has elasticity, and the base cylindrical portion 38 a of the base 38 is inserted into the lower surface hole 32 c after the spring 40. At this time, the base flange portion 38c having the round hole-shaped base hole portion 38b is accommodated in the recess portion 32b.

  Further, the base cylinder part 38a is projected in a cylindrical shape on the back side of the lower surface hole 32c from the base flange part 38c, the end part of the base cylinder part 38a on the back side of the lower surface hole 32c is closed, and the length of the spring 40 and the base cylinder part are Since the sum of the length of 38a is larger than the depth of the lower surface hole 38a, the spring 40 is held in a compressed state in the lower surface hole 32c by the insertion of the base 38.

  Further, after the base 38 is inserted into the lower surface hole 32 c, the cover 39 is fixed to the recess 32 b from the lower side of the base 38, so that the base 38 is held inside the lower surface hole 32 c without jumping out due to the elasticity of the spring 40.

  The cover 39 has a contact portion 39a that contacts the upper surface of the base portion 37b of the lower hinge 37, a cover hole portion 39b that penetrates the contact portion 39a coaxially with the base cylinder portion 38a of the base 38, and a base flange portion 38c. And a cover convex portion 39d that rises from the cover flange portion 39c toward the concave portion 32c, contacts the concave portion 32c, and fixes the cover 39 to the concave portion 32c.

  The cover convex portion 39d has a cylindrical shape which is coaxial with the base hole portion 38b and has a slightly smaller diameter than the base hole portion 38b when the cover 39 is fixed to the concave portion 32c.

  Further, even when the cover convex portion 39d is fixed to the concave portion 32c, the space between the upper surface of the cover flange portion 39c and the lower surface of the concave portion 32c has a predetermined space 41 in addition to the flange thickness of the base flange portion 38c.

  As a result, in a state where the cold room door is provided with the spring 40, the base 38, and the cover 39, the lower surface of the base 38 comes into contact with the upper surface of the cover 39 by the elastic force of the spring 40. The upper surface of the flange portion 39c and the lower surface of the base flange portion 38c are in contact with each other, and a predetermined space 41 is provided between the base flange portion 38c and the lower surface of the concave portion 32c.

  Further, the base 38 can move upward by a predetermined space 41 independently of the cover 39 while further compressing the spring 40 when receiving an upward force.

  The base cylinder part 38a and the contact part 39a have a base vertical groove part 38d and a cover groove part 39e, respectively, so that the pin 37d does not hit when the lower hinge 37 is inserted.

  The inner diameter of the base cylinder part 38a and the inner diameter of the cover hole part 39b are both slightly larger than the diameter of the lower rotating shaft 37c of the lower hinge 37, and the tip of the pin 37d of the lower hinge 37 is conversely the inner diameter of the base cylinder part 38a. And the cover hole portion 39b are set so as not to protrude from at least the outer diameter of the base tube portion 38a.

  Further, the base vertical groove portion 38d is formed from the lower surface of the base cylinder portion 38a to the middle in the vertical direction, and the upper end of the base vertical groove portion 38d slightly contacts the upper end of the pin 37d and the upper end of the base vertical groove portion 38d when the lower rotary shaft 37c is inserted. The spring 40 is set so as not to be further compressed, and the path 38e has a vertical space that allows the pin 37d to travel in the rotational direction of the refrigerator compartment door 32 from the upper end of the base vertical groove 38d. Is provided.

  The path 38e has an inclined portion 38f inclined downward in the rotating direction of the refrigerator compartment door 32 from the lower end of the base vertical groove portion 38d, and a horizontal formed in a substantially horizontal direction in the rotating direction of the refrigerator compartment door 32 further from the upper end of the inclined portion 38f. 38 g and a terminal portion 38 h that restricts the rotation of the refrigerator compartment door 32 by the pin 37 d coming into contact with the end of the horizontal portion 38 g when the refrigerator compartment door 32 is rotated.

  The pin 37d moves up and down while compressing the spring 40, so that the pin 37d always reaches the end portion 38h while coming into contact with the upper surface of the path 38e, and the predetermined space 41 is more than the distance between the upper and lower ends of the inclined portion 38f. It is set as follows.

  When the refrigerator compartment door 32 is opened from the state in which the refrigerator compartment door 32 is in the closed position and the pin 37d is in contact with the upper end of the base vertical groove 38d, the pin 37d first appears to be inclined from the upper end of the upper surface of the inclined portion 38f. At this time, the pin 37d itself does not move, and the base 38 moves upward while further compressing the spring 40, and further rotates in the opening direction together with the refrigerator compartment door 32. Next, when the pin 37d reaches the lower end of the upper surface of the inclined portion 38f, the pin 37d runs on the upper surface of the horizontal portion 38g, the base 38 rotates together with the refrigerator compartment door 32 while maintaining the compression of the spring 40, and the pin 37d When reaching 38h, the opening of the refrigerator compartment door 32 stops.

  On the contrary, when the refrigerator door 32 is closed from the fully opened position, when the pin 37d passes through the horizontal portion 38g and reaches the lower end of the upper surface of the inclined portion 38f, it apparently rises from the lower end of the upper surface of the inclined portion 38f. Even when the pin 37d itself does not move, the base 40 moves downward while releasing the compression of the spring 40, and further rotates together with the refrigerator compartment door 32 in the closing direction.

  Since the spring 40 releases the compression when the pin 37d is at the inclined portion 38f, a downward force is always applied to the base 38 by the compression release of the spring 40, and as a result, the pin 37d apparently goes up the inclined portion 38f. Thus, the refrigerator compartment door 32 has a self-closing function.

  Therefore, the second position at which the self-closing function of the refrigerator compartment door 32 starts operating is determined by the position of the lower end of the upper surface of the inclined portion 38f.

  Further, the lower surface of the path 38e is formed to be substantially parallel to the upper surface with a gap larger than the diameter of the pin 37d, and further, the lower surface of the inclined portion 38f is provided with a buffer member 38i in the middle of the inclination.

  The buffer member 38i hardly obstructs the traveling of the pin 37d in the opening direction of the refrigerator compartment door 32, and inhibits the traveling of the pin 37d by friction with the pin 37d only in the closing direction, and when the refrigerator compartment door 32 is closed. It has directionality in the deceleration function of relaxing the speed, and is provided at a position that is a predetermined distance away from the upper and lower ends of the inclined surface of the inclined portion 38f.

  Further, the diameter of the pin 37d is set slightly narrower only between the upper surface of the buffer part article 38i and the upper surface of the inclined part f, and the pin 37d always comes into contact with the buffer member 38i when the refrigerator compartment door 32 is opened and closed.

  When the refrigerator compartment door 32 reaches the second position when the door is closed and the pin 37d reaches the lower end of the upper surface of the inclined portion 38f, the refrigerator compartment door 32 starts to self-close and further closes for a predetermined distance, and the pin 37d becomes the buffer member 38i. When the lower end of the refrigeration chamber door 32 is reached, the friction between the pin 37d and the buffer member 38i impedes the travel of the pin 37d and decelerates the speed when the refrigeration chamber door 32 is closed. The position 1 is determined from the position of the lower end of the buffer member 38i.

  Further, when the refrigerator compartment door 32 is closed from the first position, the speed when the refrigerator compartment door 32 is closed is gradually reduced due to friction between the pin 37d and the buffer member 38i, but the pin 37d is at the upper end of the buffer member 38i. When reaching, the pin 37d is not subjected to friction from the buffer member 38i, so that the reduction of the closing speed of the refrigerator compartment door 32 is finished, and the pin 37d reaches the upper end of the base vertical groove 38d as it is and the refrigerator compartment door 32 is completely closed. It will be.

  Therefore, the third position where the deceleration function of the refrigerator compartment door 32 is released is determined by the position of the upper end of the buffer member 38i.

  The lower part of the refrigerator compartment door 32 is provided with the spring 40, the base 38 and the cover 39 on the lower surface of the refrigerator compartment door 32, and the lower rotary shaft 37c is adjusted while aligning the directions of the base groove 38d, the cover groove 39e and the pin 37d. The pin 37d travels along the path 38e when the refrigerator compartment door 32 is opened and closed.

  Further, the refrigerator compartment door 32 is raised from the surface of the heat insulation box body 21 to the heat insulation box body 21 side, and when the refrigerator compartment door 32 is closed, the refrigerator compartment door 32 is positioned further inside the refrigerator compartment 28 than the inner box 23 and the partition wall 25. The refrigerator compartment door 32 has a bank portion 32d having a substantially rectangular cross section extending in the vertical direction.

  Two bank portions 32 d are provided substantially parallel to the left-right direction of the refrigerator compartment door 32, and a shelf 43 for storing objects 42 such as beverages and eggs can be taken in and out between both bank parts 32. The space on the heat insulating box 21 side of the shelf 43 is configured to be substantially flush with the tip of the bank portion 32d.

  The second position where the self-closing function of the refrigerator compartment door 32 starts operation is the front opening 21a of the heat insulating box 21 and the bank portion on the opposite side of the rotation axis of the refrigerator compartment door 32 when the refrigerator door 32 is closed. The first position where the speed reducing function of the refrigerator compartment door 32 starts to operate is the same as the front opening 21a of the heat insulating box 21 when the refrigerator compartment door 32 is closed. There is a space of about 100 mm to 150 mm between the rotation axis of the refrigerator compartment door 32 and the bank portion 32d on the opposite side, and the third position where the deceleration function of the refrigerator compartment door 32 is released is also the same as that of the refrigerator compartment door 32. When the door is closed, a space of about 1 mm to 5 mm is set between the front opening 21a of the heat insulating box 21 and the bank portion 32d opposite to the rotation axis of the refrigerator compartment door 32.

  Further, when the refrigerator compartment door 32 is fully opened, the refrigerator compartment door is opened larger than the second position and can be opened by about 120 °, and the door is manually closed from the fully opened position to the second position. is doing.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the refrigerator compartment door 32 is fully opened, and the door is gradually closed manually. The refrigerator compartment door 32 starts from about 150 mm between the front opening 21a and the bank portion 32d opposite to the rotation axis of the refrigerator compartment door 32. When reaching the second position having a space of 250 mm, the refrigerator compartment door 32 apparently starts to self-close when the pin 37d rises on the inclined portion 38f of the base 38, and further closes to close the front opening 21a and the refrigerator compartment door. When the refrigerating room door 32 reaches the first position having a space of about 100 mm to 150 mm between the rotating shaft 32 and the opposite bank portion 32d, the closing speed of the refrigerating room door 32 is the buffer member 38i and the pin 37d. It begins to slow down due to friction.

  Further, as the refrigerating room door is closed, the closing speed of the refrigerating room door 32 gradually decreases, and approximately 1 mm to 5 mm between the front opening 21a and the bank portion 32d on the opposite side of the rotation axis of the refrigerating room door 32. When the third position having the space is reached, the refrigerating room door 32 is released from the deceleration function, the pin 37d reaches the base vertical groove 38d as it is, and the refrigerating room door 32 is closed.

  Further, while the pin 37d is positioned at the inclined portion 38f, a force in the closing direction always acts on the refrigerator compartment door 32. Therefore, even when the refrigerator compartment door 32 is opened from the closed position, the refrigerator compartment door is kept in the refrigerator compartment. If the door opening operation is canceled before the self-closing function of the door 32 reaches the second position at which the operation starts, the refrigerator compartment door 32 is closed automatically.

  At this time, the second position where the self-closing function of the refrigerator compartment door 32 operates is the bank opening portion 32d opposite to the front opening 21a of the heat insulating box 21 and the rotation axis of the refrigerator compartment door 32 when the refrigerator compartment door 32 is closed. Although it seems that there is a space of about 150 mm to 250 mm between the two, it seems that the ease of use of the refrigerator 20 is improved because the manual closing operation can be reduced if the self-closing range is widened. Since the door 32 is opened and the articles 42 are taken in and out, the refrigerator compartment door 32 is opened when the refrigerator door 32 is opened once and a plurality of articles 42 are taken in and out continuously. It is easier to use if you can hold.

  Therefore, in the present embodiment, the refrigerator compartment door from the second position having a space of about 150 mm to 250 mm between the front opening 21a into which the object 42 cannot be easily put in and out and the bank portion 32d on the opposite side of the rotating shaft. The self-closing function of 32 was started, the self-closing function did not operate on the opening side from the second position, and the refrigerator compartment door 32 could be held open.

  In addition, the first position where the deceleration function of the refrigerator compartment door 32 starts to operate is the front opening portion 21a of the heat insulating box 21 and the bank portion on the opposite side of the rotation axis of the refrigerator compartment door 32 when the refrigerator compartment door 32 is closed. Although it is assumed that there is a space of about 100 mm to 150 mm between 32d and 32d, if the range in which the speed reduction function operates is wide, it takes time to close the cold room door 32, and as a result, the cold room 28 that has been cooled with much effort is required. Since the cool air inside escapes, the amount of power consumption increases or the stored item 42 in the refrigerator compartment 28 deteriorates. Therefore, it is preferable that the range in which the deceleration function operates is narrow.

  However, when the refrigerator compartment door 32 is closed, the space between the front opening 21a of the heat insulating box 21 and the bank portion 32d on the opposite side to the rotation axis of the refrigerator compartment door 32 is narrowed, or the bank portion on the opposite side to the rotation axis. When the speed reduction function starts operation from a position where 32d enters the refrigerator compartment 28 further from the front opening 21a, a user's finger or arm is sandwiched between the front opening 21a and the bank 32d opposite to the rotation shaft. There is a risk that

  Therefore, in this embodiment, the user's fingers and arms are not caught in the space between the front opening 21a of the heat insulation box 21 and the bank portion 32d on the opposite side of the rotation axis of the refrigerator compartment door 32. The space is about 100 mm to 150 mm.

  Further, when the third position where the deceleration function of the refrigerator compartment door 32 is released has a space of about 1 mm to 5 mm between the front opening 21a and the bank portion 32d on the opposite side of the rotating shaft of the refrigerator compartment door 32. However, as described above, the narrower range in which the speed reduction function operates can suppress the increase in power consumption and the deterioration of the storage object 42, and therefore the third position where the speed reduction function of the refrigerator compartment door 32 is released. It is desirable to take a wide space between the front opening 21a and the bank portion 32d on the side opposite to the rotation axis of the refrigerator compartment door 32, and to release the deceleration function as soon as possible. In this embodiment, between the front opening 21a and the bank portion 32d on the opposite side to the rotation axis of the refrigerator compartment door 32, the user's finger or arm is not pinched during the door closing operation. Refrigerated room with a space of about 1mm to 5mm And a third position where the deceleration function of A 32 is released.

  In the present embodiment, the bank 32d is provided in the refrigerator compartment door 32. However, when there is no bank 32d, the space between the surface of the refrigerator compartment door 32 on the side of the heat insulating box 21 and the front opening 21A is provided. What is necessary is just to set it as a predetermined value range.

  The surface of the shelf 43 on the side of the heat insulation box 21 is substantially the same as the tip of the bank portion 32d, but the surface of the shelf 43 on the side of the heat insulation box 21 protrudes from the tip of the bank portion 32d to the side of the heat insulation box 21. In the case where the distance between the front end portion 21a of the shelf 43 and the surface of the shelf 43 on the side opposite to the rotation axis of the refrigerator compartment door 32 and the surface of the shelf 43 on the side of the heat insulation box 21 is smaller than each predetermined value. The range may be used.

  Further, in the case of a double door with the refrigerator compartment door 20 of the refrigerator 20 divided into left and right, the tip of the bank portion 32d opposite to the rotation axis of the refrigerator compartment door 32 on the side in the open state and the heat insulating box 21 of the shelf 43. A space having a smaller distance between the heat insulating box 21 of the refrigerator compartment door 32 on the side in the closed position and the external surface on the opposite side may be set to each predetermined value range.

  As described above, in the present embodiment, the refrigerator 20 is provided with the pin 37d and the base 38 of the lower hinge 37 having the self-closing function and the deceleration function for operating the refrigerator compartment door 32, so that the refrigerator compartment door 32 is self-closing. The door closing operation can be performed at a slow speed regardless of the weight of the refrigerator compartment door 32 itself and the weight of the articles 42 stored in the shelves 43, thereby improving the usability of the refrigerator 20 and realizing a safe door closing operation. be able to.

  In addition, the first position where the deceleration function of the pin 37d of the lower hinge 37 and the base 38 starts operating is positioned closer to the heat insulating box 21 than the second position where the self-closing function starts operating, so that the refrigerator compartment If the closing speed of the door 32 is reduced and then self-closing, the momentum at the time of closing cannot be used for self-closing, so that the pin 37d and the base 38 of the lower hinge 37 having the self-closing function require a large self-closing ability. It can suppress that a functional part becomes large-sized.

  Further, by taking a space of a predetermined value range between the front opening 21a of the heat insulation box 21 and the bank portion 32d on the opposite side to the rotation axis of the refrigerator compartment door 32 with respect to the self-closing distance of the refrigerator compartment door 32, The ease of use of the refrigerator 20 can be further improved by setting the self-closing distance by the pins 37d of the lower hinge 37 and the base 38 in accordance with the usage situation of the user of the refrigerator 20.

  The first position at which the speed reduction function of the refrigerator compartment door 32 starts operating is a predetermined value between the front opening 21a of the heat insulating box 21 and the bank portion 32d of the refrigerator compartment door 32 on the opposite side to the rotation axis. By taking the space of the range, it is possible to prevent the user's arms and fingers from being pinched by setting the deceleration distance by the pin 37d and the base 38 of the lower hinge 37 according to the usage situation of the refrigerator 20 user. Safety can be further improved.

  When the refrigerator compartment door 32 is closed from the fully opened position, it is manually closed until the second position where the self-closing function by the pin 37d of the lower hinge 37 and the base 38 starts to operate, and the door is moved to the second position. When the door reaches the first position where the deceleration function by the pin 37d and the base 38 of the lower hinge 37 starts to operate, the pin 37d of the lower hinge 37 and the base 38 are closed. By self-closing while decelerating in response to the deceleration action by the base 38, the self-closing ability of the self-closing function by the pin 37d of the lower hinge 37 and the base 38 can be reduced by providing a manual portion for the closing operation. The pin 37d and the base 38 of the lower hinge 37 having a self-closing function can be reduced in size and cost.

  Further, the deceleration function by the pin 37d of the lower hinge 37 and the base 38 that inhibits the self-closing operation of the refrigerator door 32 using the self-closing function of the refrigerator 20 by the pin 37d and the base 38 of the lower hinge 37 is started from the middle of the door closing operation. By releasing, the deceleration function that inhibits self-closing does not operate immediately before the refrigerator compartment door 32 completely closes, and only the self-closing function operates, and the self-closing function improves the self-closing reliability. Can be planned.

(Embodiment 2)
FIG. 11 is an upper perspective view of the refrigerator in the second embodiment of the present invention. FIG. 12 is a plan view of the refrigerator in the second embodiment of the present invention. FIG. 13 is a configuration diagram of the self-closing function unit according to the second embodiment of the present invention. FIG. 14 is an enlarged view of a main part of the door device according to Embodiment 2 of the present invention. FIG. 15 is an operation diagram of the door device according to Embodiment 2 of the present invention. FIG. 16 is an operation diagram of the door device according to the second embodiment of the present invention. FIG. 17 is an operation diagram of the door device according to Embodiment 2 of the present invention.

  In the figure, a door 110 is pivotally supported on an upper portion of the refrigerator main body 100 having a front opening 102 so as to be rotatable about a hinge 101 as a rotation center.

  The hinge cover 120 is a resin cover that covers the upper portion of the hinge 101.

  The self-closing mechanism portion 130 is disposed on the ceiling portion near the hinge 101 of the refrigerator main body 100 and mainly includes the first mechanism 131, the second mechanism 132, the permanent magnet 133, the damper 134, and the first spring 135. And a second spring 136 and a position detection switch 137.

  The first mechanism 131 is connected to the center of rotation of the hinge 101 so as to be rotatable coaxially. The first mechanism 131 is a substantially L-shaped mechanism member formed on the upper surface of the hinge cover 120 as an attachment position. The material is preferably a material that can ensure a predetermined strength, such as Duracon or steel plate.

  Here, in a state in which the first mechanism 131 is fixed to the hinge 101, the first mechanism 131 includes a first body 131a having a shape directed rearward from the hinge 101 and a first body 131a in the width direction of the refrigerator. Is formed with a second body portion 131b having a shape directed toward the anti-hinge 101, and a shaft through hole 131c is formed in the vicinity of the front of the second body portion 131b.

  The second mechanism 132 is a substantially L-shaped mechanism member that is rotatably attached to the first mechanism 131, and in the attached state, the first side 132a that is substantially horizontal to the width direction of the refrigerator; It is composed of a second side 132b that is configured to be directed rearward. As a material, a material that can ensure a predetermined strength such as Duracon or a steel plate is preferable.

  Here, in the second mechanism 132, two shafts are formed downward in the attached state.

  The first shaft 132c is a substantially cylindrical shaft formed in an L-shaped corner portion, and the second mechanism 132 is located with respect to the first mechanism 131 by the first shaft 132c passing through the shaft through hole 131c. It can be rotated.

  The second shaft 132d is a substantially cylindrical shaft formed at the rear end of the second side 132b. Here, a first guide groove 121 and a second guide groove 122 are formed in the hinge cover 120.

  The first guide groove 121 is an oblong hole centered on the hinge 101, and the first shaft 132 c penetrating the through shaft hole 131 c penetrates the first guide groove 121, so that the range of the first guide groove Only the first mechanism 131 is allowed to rotate. At this time, the range of the first guide groove 121 is set so that the first mechanism 131 can move only between the first stop position and the vicinity of the second stop position.

  In the present embodiment, the first stop position is a state where the first body 131a is inclined 8 ° rearward with respect to the width direction of the refrigerator, and the second stop position is the first body 131a is the width of the refrigerator. It is a state that is horizontal to the direction.

  The second guide groove 122 is a rounded hole having a square shape formed in a base 123 disposed behind the first guide groove 121. The long side 122a of the second guide groove 122 is centered on the hinge 101, and the short side 122b is centered on the first axis 132c at the second stop position. Here, when the second shaft 132d passes through the second guide groove 122, the rotational movement of the second mechanism 132 around the first shaft 132c is restricted.

  That is, in the first state where the second shaft 132d is positioned on the long side 122a, the first side 132a is substantially horizontal with the first mechanism 131 and the permanent magnet 133, and the first side 132a, the first mechanism 131, and the permanent magnet 133 are located. The front end of each overlaps in the top view. In this first state, the first mechanism 131 can rotate around the hinge 101.

  Next, when the second shaft 132d is in the second state positioned on the short side 122b, the first side 132a is in a state in which the front end protrudes forward with respect to the first mechanism 131 and the permanent magnet 133. In this second state, the first mechanism 131 cannot rotate around the hinge 101.

  The permanent magnet 133 is a magnet fixed in front of the second body 131b, and it is desirable to use neodymium or a ferrite magnet as the magnet material.

  The damper 134 is a rectilinear damper fixed to the hinge cover 120.

  Here, the damper 134 includes a damper main body 134 a and a damper case 134 b that houses the damper main body 134 a, and the front end of the damper main body 134 a is the rear end surface of the first mechanism 131 in the operation range of the first mechanism 131. Abut.

  The damper main body 134a is filled with silicon oil, and the operation is switched in two stages with respect to the load. (Details are not shown) Specifically, when a high load is generated as a load, the operation load of the damper main body 134a is increased, and when the load is decreased, the operation load of the damper main body 134a is also decreased. Second operation.

  In addition, an operation load is generated in the direction in which the damper main body 134a is compressed, and the operation load is preferably substantially zero in the opposite direction. A return spring is built in to return to the position.

  The first spring 135 pulls the first mechanism 131 rearward by connecting the end of the first mechanism 131 on the side opposite to the hinge 101 and the vicinity of the rear of the hinge cover 120.

  Here, when the first mechanism 131 is at the second stop position, the elastic force of the first spring 135 is maximum, and when it is at the first stop position, the elastic force is minimum. Even at the first stop position, a slight elastic force was applied so that the elastic force would not become zero.

  The second spring 136 connects the first mechanism 131 and the second mechanism 132 to pull the first side 132a of the second mechanism 132 forward.

  The position detection switch 137 is disposed so as to contact the rear end surface of the first mechanism 131, and is a position detection switch for detecting the position of the first mechanism 131. The position detection switch 137 incorporates a Hall IC and is unitized. A base is used (details not shown).

  Here, as an operation of the position detection switch 137, when the contact is pressed, the position detection switch 137 is electrically opened, and the control means (not shown) determines that the door 110 is closed. On the other hand, when the contact is not pushed, it is electrically closed, and the control means (not shown) determines that the door 110 is open.

  The connecting portion 140 includes a protrusion 141 formed in a convex shape inside the door facing the permanent magnet 133, and a magnetic body 142 formed at the tip of the protrusion 141. It is desirable to use a coated steel sheet.

  Here, when the door 110 is in the fully closed state, the shape of the protrusion 141 is determined so that the magnetic body 142 and the permanent magnet 133 fixed to the first mechanism 131 at the first stop position come into contact with each other. .

  The cover 150 is a member that covers the upper portion of the refrigerator main body 100, and a notch 151 is formed at a position where the permanent magnet 133 and the connecting portion 140 abut.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, when the door 110 is in the fully closed state, the connecting portion 140 has the magnetic body 142 and the permanent magnet 133 fixed to the first mechanism 131 at the first stop position in a state of passing through the notch 151. It abuts and is connected by magnetic force.

  Furthermore, when the first side 132a and the magnetic body 142 abut, the second mechanism 132 is in the first state, and the first mechanism 131 can rotate around the hinge 101.

  In addition, the damper main body 134a is pushed rearward by the rear end face of the first mechanism 131.

  Further, the position detection switch 137 is electrically opened by a contact point pushed by the rear end face of the first mechanism 131, and the control means (not shown) determines that the door 110 is closed.

  Next, when the door 110 is opened by a human hand, the first mechanism 131, the second mechanism 132, and the permanent magnet 133 are connected to the hinge 101 by connecting the connecting portion 140 and the permanent magnet 133 by magnetic force. Move forward while rotating around. Along with this, the first spring 135 is stretched to store elastic force, and the damper main body 134a moves forward by the action of the return spring.

  At this time, the position detection switch 137 is electrically closed when the rear end face of the first mechanism 131 is separated from the contact, and the control means (not shown) determines that the door 110 is open. Here, by directly detecting the position of the door 110 as in a conventional refrigerator, a certain amount of differential is necessary for identifying the opening and closing of the door 110, and in this embodiment, the detection accuracy is very high. The open state can be determined from the closed state.

  Next, the door 110 is further opened by a human hand, and in this embodiment, the first mechanism 131 rotates around the hinge 101 in a state where the door 110 is slightly opened from 8 °. By stopping by the one guide groove 121, the connection between the connecting portion 140 and the permanent magnet 133 by the magnetic force is released.

  At this time, the connection between the connection portion 140 and the permanent magnet 133 is released, so that the first side 131a of the second mechanism 132 is allowed to rotate forward by the action of the second spring 136, and the second shaft 132d is By moving to the short side 122b and entering the second state, the first mechanism 131, the second mechanism 132, and the permanent magnet 133 cannot be rotated around the hinge 101.

  However, since the second shaft 132d slightly moves rearward toward the end of the short side 122b, in the present embodiment, the first body 131a and the permanent magnet 133 are horizontally aligned with the horizontal direction of the refrigerator. The rotation of the first mechanism 131 stops at the two stop positions, and the first side 132a of the second mechanism 132 stops at a position protruding forward from the front end surface of the permanent magnet 133. In addition, the damper main body 134a also moves forward and returns, so that the damper main body 134a stops in contact with the rear end surface of the first mechanism 131.

  That is, the self-closing function unit 130 stores an elastic force in the first spring 135 and is pulled forward to stop.

  At this time, the self-closing function part 130 and the connection part 140 are disposed in the vicinity of the hinge 101, and the protrusion allowance of the protrusion 141 can be reduced, so that the design of the refrigerator is not impaired. Furthermore, since the self-closing function part 130 and the connection part 140 are comprised in the ceiling part, a person cannot touch easily.

  Next, when the door 110 in the fully opened state is closed by a human hand and the door 110 is in an opened state of 8 °, the connection portion 140 and the permanent magnet 133 are attracted and brought into contact with each other by the magnetic force. The upper part abuts on the second mechanism 132 and the first side 132a moves rearward to change from the second state to the first state, so that the first mechanism 131 can rotate around the hinge 101, The door 110 is self-closed by being pulled backward by the elastic force stored in the first spring 135.

  Here, in the present embodiment, when the door 110 is opened by 8 °, there is a risk that a human hand or finger may be caught between the inner wall of the door 110 and the refrigerator main body 100 and other doors facing the inner wall. A gap of about 100 mm is formed.

  After the door 110 starts self-closing, the first mechanism 131 moves rearward until it reaches the first stop position, and the rear end surface of the first mechanism is moved rearwardly through the damper main body 134a. It will self-close while decelerating until it is fully closed.

  In other words, in a state where there is a danger of pinching a human hand or finger, it is possible to self-close while decelerating.

  Here, due to the inertial force applied to the door 110 by a human hand, at the moment when the permanent magnet 133 and the connecting portion 140 abut, the load on the damper 133 becomes maximum, and the damper 133 becomes the first operation, A large deceleration effect can be obtained. Next, once the door 110 decelerates, the damper 133 enters a second operation, and self-closes at a slow speed even with a small load.

  That is, self-closing while decelerating is possible even with a small self-closing force.

  Further, in the present embodiment, the first spring 135 maintains a slight elastic force even at the first stop position, so that the self-closing force can be maintained from the self-closing start to the fully-closed state. Dimensions can be secured.

  In addition, when the load applied to the damper 133 is large, such as when there are many items to be stored or when the door 110 is closed vigorously, the damper 133 performs the first operation, and a large deceleration effect is obtained.

  In addition, when the load applied to the damper 133 is small, such as when there is little storage or when the door 110 is slowly closed, the damper 133 performs the second operation and the deceleration effect is reduced.

  Further, when the door 110 is fully closed, the contact point of the position detection switch 137 is pushed by the rear end face of the first mechanism 131, so that the control means (not shown) is opened. 110 is determined to be closed. Here, by directly detecting the position of the door 110 as in a conventional refrigerator, a certain amount of differential is necessary for identifying the opening and closing of the door 110, and in this embodiment, the detection accuracy is very high. A door gap can be detected.

  As described above, the refrigerator according to the present embodiment is provided in the refrigerator main body 110 having the front opening, the door 110 that is rotatably arranged at the hinge 101 with respect to the refrigerator main body 110, and the refrigerator main body 100. , A self-closing function part 130 for self-closing the door 110, and a connection part formed on the door 110 so as to face the self-closing function part 130 and detachably connected to the self-closing function part 130 when the door 110 is closed. 140, and the self-closing function part 130 is provided at a location different from the hinge 101, and the self-closing function part 130 pulls the connection part 140 to cause the door 110 to self-close in the closing direction. A self-closing dimension can be obtained.

  Furthermore, the self-closing function part 130 and the connection part 140 are disposed in the vicinity of the hinge 101 in the width direction of the refrigerator main body 100, so that the self-closing function part 130 and the connection part are separated from the opening part of the door 110. 140 will be arrange | positioned and the design property of a refrigerator can be improved.

  Furthermore, the self-closing function part 130 and the connection part 140 are detachably coupled by magnetic force, so that no reaction force is generated by the latch mechanism in the self-closing process, and forgetting to close the door 110 can be prevented. it can.

  Further, after the self-closing function part 130 and the connection part 140 are coupled, the self-closing function part 130 obtains the self-closing force with a simple structure by closing the door 110 by the self-closing force by the first spring 135. Thus, the cost of the self-closing function unit 130 can be reduced.

  Furthermore, since the self-closing function unit 130 is configured with a door switch that detects opening and closing of the door 100, it is not necessary to provide a door switch in the refrigerator main body 100, and the assembly of the refrigerator can be improved.

  Further, since the self-closing function unit 130 and the connection unit 140 are disposed on the ceiling of the refrigerator main body 100, the self-closing function unit 130 and the connection unit 140 are located at places where it is difficult for human hands to reach. The frequency with which a person accidentally touches when putting in and out can be reduced, and the reliability of the self-closing function part 130 and the connection part 140 can be improved.

  Furthermore, the self-closing function unit 130 is connected to the first mechanism 131 that rotates only a predetermined angle from the door 110 fully closed state in conjunction with the rotation of the door 110, and in the state where the door 110 is connected to the self-closing function unit 130. One mechanism 131 can be rotated, and in a state where the door 110 is disconnected from the self-closing function unit 130, the second mechanism 132 that stops the rotation of the first mechanism 131 and the first mechanism 131 at the rear of the refrigerator A first spring 135 is provided, and a permanent magnet 133 is formed at the front end of the first mechanism 131, so that the self-closing function unit 130 and the door 110 are detachably connected by magnetic force. In the self-closing process, no reaction force is generated by the latch mechanism.

  Furthermore, by providing the magnetic body 142 on the inner surface of the door 110 facing the permanent magnet 133 provided in the first mechanism 131, the self-closing function portion 130 and the door 110 are detachably connected by magnetic force. Therefore, no reaction force is generated by the latch mechanism in the self-closing process.

  Furthermore, since the self-closing function unit 130 includes the position detection switch 137 that detects the position of the first mechanism 131, highly accurate position detection can be performed, and the position detection accuracy of the door 110 can be improved.

  Further, since the rotation center of the first mechanism 131 is coaxial with the rotation center of the door 110, the contact portion between the self-closing function unit 130 and the connection unit 140 is in a fixed position, and the self-closing mechanism is a simple mechanism. The function unit 130 and the connection unit 140 can be configured.

  Furthermore, in the state where the first mechanism 131 has moved forward, the front ends of the first mechanism 131 and the permanent magnet 133 are positioned rearward from the front surface of the refrigerator main body 100, so that the first mechanism 131, which is a movable part, is refrigerator. There is no discharge from the front surface of the main body 100, and the design of the refrigerator can be improved.

  Further, a protrusion 141 is formed on the inner surface of the door 110 facing the permanent magnet 133 disposed in the first mechanism 131 toward the refrigerator main body, and the magnetic body 142 is disposed at the tip of the protrusion 141 so that the movable body is movable. The first mechanism 131 that is a part does not discharge from the front surface of the refrigerator body 100, and the design of the refrigerator can be improved.

  In this embodiment, the position detection switch 137 for detecting the opening / closing of the door 110 is arranged to detect the position of the first mechanism 131, but the position detection switch 137 is used to detect the position of the connecting portion 140. The same effect can be expected even if the is disposed.

  In this embodiment, the straight-ahead silicon oil damper is used as the speed reducing means, but the same effect can be expected even if a straight-ahead air damper is used.

(Embodiment 3)
FIG. 18 is a main part configuration diagram of a door device according to Embodiment 3 of the present invention. FIG. 19 is a characteristic diagram according to the third embodiment of the present invention. FIG. 20 is an operation diagram of the door device according to Embodiment 3 of the present invention. FIG. 21 is an operation diagram of the door device according to Embodiment 3 of the present invention.

  In the figure, the self-closing mechanism 230 is disposed on the ceiling near the hinge 101 of the refrigerator main body 100 and mainly includes a first mechanism 231, a drive source 232, a position detection switch 233, and a second mechanism 132. The permanent magnet 133, the damper 134, and the second spring 136 are configured.

  The first mechanism 231 is connected to the rotation center of the hinge 101 so as to be rotatable coaxially, and is a substantially L-shaped mechanism member formed on the upper surface of the hinge cover 120 as an attachment position. The material is preferably a material that can ensure a predetermined strength, such as Duracon or steel plate.

  Here, in a state in which the first mechanism 231 is fixed to the hinge 101, the first mechanism 231 includes a first body 231a having a shape directed rearward from the hinge 101 and a first body 231a in the width direction of the refrigerator. Is formed with a second body portion 231b shaped in the direction toward the anti-hinge 101, a shaft through hole 231c is formed in the vicinity of the front of the second body portion 231b, and a guide is provided in the vicinity of the end on the anti-hinge 101 side. A groove 231d is formed.

  In the present embodiment, the first stop position is a state in which the first body 231a is inclined rearward by 8 ° with respect to the horizontal direction of the refrigerator, and the second stop position is the first body 231a is the width of the refrigerator. It is a state that is horizontal to the direction.

  The drive source 232 performs an operation of pulling the first mechanism 231 backward when energized. In this embodiment, the drive source 232 is a solenoid disposed behind the first mechanism 231 and includes a coil 232a serving as an electromagnet and an iron core 232b. The front end of the iron core 232b is connected to the guide groove 231d.

  Here, in the figure, it is a characteristic diagram showing the relationship between the moving distance and the propulsive force of each drive source and the elastic body. The propulsive force of the elastic body is maximum at the second stop position, whereas the solenoid In the drive reduction of the mold, the driving force is set to be maximum in the vicinity of the first stop position.

  The position detection switch 233 is a position detection switch that is disposed on the upper surface of the first mechanism 231 and detects the position of the connecting portion 140, and uses a unitized base board that incorporates a Hall IC. (Details not shown).

  Here, as the operation of the position detection switch 233, when the contact is pressed, the position detection switch 233 is electrically opened, and the control means (not shown) determines that the door 110 is closed. On the other hand, when the contact is not pushed, it is electrically closed, and the control means (not shown) determines that the door 110 is open.

  At this time, the control means is programmed to energize the drive source 232 for a predetermined time only when the door 110 shifts from the open state to the closed state, and vice versa, that is, the door 110 changes from the closed state to the open state. When the transition is made, the drive source 232 is not energized.

  The connecting portion 240 is composed of a protrusion 241 formed inside the door 110 facing the permanent magnet 133 and a magnetism 242 formed at the tip of the protrusion 241. The material of the magnetic body 242 is painted on the surface. It is desirable to use a coated steel plate.

  Here, when the door 110 is in the fully closed state, the magnetic body 242 and the permanent magnet 133 fixed to the first mechanism 231 in the first stop position are in contact with each other, and the contact of the position detection switch 233 is also in contact. In this state, the shape of the protrusion 241 is determined so that the position detection switch 233 is electrically opened.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the fully closed door 110 is opened by a human hand, and in this embodiment, the first mechanism 131 rotates around the hinge 101 with the first guide when the door 110 is opened by 8 °. By stopping by the groove 121, the connection between the connecting portion 240 and the permanent magnet 133 by the magnetic force is released.

  Further, due to the action of the second mechanism 132, the self-closing function unit 230 stops at the second stop position.

  At this time, the contact between the position detection switch 233 and the connection portion 240 is also released, so that the control unit determines that the door 110 has shifted from the closed state to the open state. That is, the drive source 232 is not energized.

  Next, when the fully opened door 110 is closed by a human hand and the door 110 is in an opened state of 8 °, the connection portion 240 and the permanent magnet 133 are attracted and brought into contact with each other by magnetic force, and the magnetic body 242 The upper part contacts the second mechanism 132 and the first side 132a moves rearward to be in the first state, so that the first mechanism 131 can rotate around the hinge 101.

  In addition, when the connection part 240 and the position detection switch 233 come into contact with each other, the control unit determines that the door 110 has shifted from the open state to the closed state. That is, when the drive source 232 is energized, the drive source 232 pulls the door 110 backward together with the first mechanism 231.

  At this time, the rear end surface of the first mechanism 231 is moved rearward through the damper main body 134a, so that the door 110 is self-closed while decelerating until it is fully closed.

  Here, unlike the spring propulsion force, the drive source 232 is set so as to obtain the highest propulsion force immediately before the fully closed state. For example, the door 110 is wide and requires a large self-closing force. Even in this case, the door can be reliably closed to the fully closed state while overcoming the drag of the damper 130.

  As described above, the refrigerator according to the present embodiment is provided in the refrigerator main body 110 having the front opening, the door 110 that is rotatably arranged at the hinge 101 with respect to the refrigerator main body 110, and the refrigerator main body 100. , A self-closing function unit 230 that self-closes the door 110, and a connection part that is formed on the door 110 so as to face the self-closing function unit 230 and is detachably connected to the self-closing function unit 230 when the door 110 is closed. 240. After the self-closing function unit 230 and the connection unit 240 are connected, the self-closing function unit 230 is the highest immediately before the fully closed state by closing the door 110 by the driving force of the solenoid type driving source 232. Propulsive force can be obtained, and the door 110 that requires a large self-closing force can be reliably closed to the fully closed state.

  In this embodiment, a solenoid is used as the drive source 232, but the same effect can be expected even when a motor-type drive source is used.

(Embodiment 4)
FIG. 22 is a main part configuration diagram of a door device according to Embodiment 4 of the present invention. FIG. 23 is a view of the door device according to the fourth embodiment of the present invention as viewed in the direction of arrow A in FIG. FIG. 24 is an operation diagram in the fourth embodiment of the present invention. FIG. 25 is an operation diagram in the fourth embodiment of the present invention.

  In the figure, the self-closing function part 310 is mainly composed of a guide rail 311, an inclined member 312 and an elastic body 313, and is fixed to the ceiling surface of the refrigerator main body.

  The guide rail 311 is connected to the damper 330 and is fixed to the ceiling surface of the refrigerator body. Here, the upper wall of the guide rail 311 is formed with a groove 311 a having an opening on the damper 330 side end, and the guide rail 311 is formed with a groove 311 b having both ends closed.

  Further, a groove 311c having an opening on the groove 311b side is formed near the front end of the guide rail 311, and a groove 311d having both ends closed is formed on the opposite side wall of the groove 311b.

  The inclined member 312 is rotatably connected to the end of the damper 330 at the first connecting portion 312a, and the first connecting portion 312a is guided by the groove 311a so as to be horizontally movable. Further, two protrusions 312b and 312c are formed on the side surface of the inclined member 312. The two protrusions 312b and 312c protrude from the side wall of the guide rail 311 and are fitted in the groove 311b to move in the horizontal direction. Furthermore, the end portion of the second connection portion 312d protruding from the first connection portion 312a passes through the groove 311d.

  The elastic body 313 connects the outer rear end of the damper 330 and the second connection portion 312 d of the inclined member 312.

  The connection part 320 is mainly composed of a plate 321 and a roller 322.

  The plate 321 is fixed to the upper surface of the door 110 and has a shape protruding in the direction of the refrigerator main body 100. As a material, it is desirable to use a steel plate subjected to surface treatment.

  The roller 322 is a cylindrical body member that is rotatably disposed on the lower surface of the end portion of the plate 321 on the refrigerator main body 100 side, and is positioned between the two protrusions 312b and 312c in the installed state.

  The damper 330 is a rectilinear damper disposed at the rearmost part of each section and connected to the rear end of the guide rail 311, and mainly includes a damper main body 331 and an operation shaft 332.

  The damper main body 331 has a structure in which a piston is disposed in a cylindrical casing and filled with silicon oil, and its operation is switched in two stages with respect to the load. Specifically, when a high load is generated as a load, the first operation increases the operation load of the damper 331, and when the load decreases, the second operation decreases the operation load of the damper 331 (see FIG. Not shown).

  The operating shaft 332 is a shaft connected to the piston of the damper main body 331, and the front end thereof is connected to the first connection portion 312 a of the inclined member 312.

  The operation | movement and effect | action are demonstrated below about the door apparatus comprised as mentioned above.

  First, when the door 110 is in the fully closed state, the inclined member 312 is positioned at the rear end of the guide rail 311, and the roller 322 of the connecting portion 320 is positioned between the two protrusions 312 b and 312 c.

  Next, when the door 110 is opened by a human hand, the inclined member 312 moves forward by the roller 322 coming into contact with the protrusion 312b as the door 110 is opened.

  At this time, the operating shaft 332 connected to the first connection portion 312a also moves forward.

  Further, the elastic body 313 connected to the second connection portion 312d is stretched to accumulate an elastic force.

  Next, the door 110 is further opened by a human hand, and in this embodiment, in a state where the door 110 is opened by 8 °, the connection between the inclined member 312 and the connecting portion 320 is released, and the projection 312b. The tilting member stops at the front end of the guide rail 311 by tilting in such a manner that it is fitted into the groove 311c.

  Next, when the door 110 in the fully opened state is closed by a human hand, and the door 110 is further closed from the opened state of 8 °, the tilting of the inclined member 312 is released by the contact between the roller 322 and the protrusion 312c. As a result, the roller 322 is sandwiched between the two protrusions 312b and 312c, and the door 110 starts self-closing by the elastic force accumulated in the elastic body 313.

  Here, in the present embodiment, when the door 110 is opened by 8 °, there is a risk that a human hand or finger may be caught between the inner wall of the door 110 and the refrigerator main body 100 and other doors facing the inner wall. A gap of about 100 mm is formed.

  At this time, since the operating shaft 332 and the inclined member 312 are connected, the door 110 is self-closed while decelerating until the fully closed state due to the deceleration effect of the damper 330.

  In other words, in a state where there is a danger of pinching a human hand or finger, it is possible to self-close while decelerating.

  Furthermore, in this embodiment, the elastic body 313 can maintain a self-closing force from the self-closing start to the fully-closed state, so that a large self-closing dimension can be ensured.

  As described above, the refrigerator according to the present embodiment is provided in the refrigerator main body 100 having the front opening, the door 110 arranged to be rotatable at the hinge 101 with respect to the refrigerator main body 100, and the refrigerator main body 100. A self-closing function part 310 that self-closes the door 110, and a connection part 320 that is formed on the door 110 so as to face the self-closing function part 310 and is connected to the self-closing function part 310 at least when the door 110 is closed. The self-closing function unit 310 is provided at a location different from that of the hinge 101, and the self-closing function unit 310 and the connection unit 320 are detachably connected by a latch mechanism. The self-closing force is transmitted to the door from the connection portion 320 to the fully closed state, and the self-closing dimension can be increased.

  As described above, since the door device according to the present invention has a safe self-closing mechanism regardless of the weight of the door itself or the weight of the articles to be stored in the door, it is also applicable to applications such as furniture having a revolving door. it can.

Side sectional view of the refrigerator according to Embodiment 1 of the present invention. The perspective view of the refrigerator compartment door upper part of the refrigerator of the embodiment The exploded perspective view of the refrigerator compartment door lower part of the refrigerator of the embodiment Vertical section of the lower part of the refrigerator compartment door of the same embodiment Side sectional view of the refrigerator compartment lower part of the refrigerator of the embodiment The perspective view of the main components of the refrigerator of the embodiment Plan sectional drawing when the refrigerator compartment door of the refrigerator of the embodiment is fully opened Plan sectional drawing when the refrigerator compartment door of the refrigerator of the embodiment has reached the second position Plan sectional drawing when the refrigerator compartment door of the refrigerator of the embodiment has reached the first position Plan sectional drawing when the refrigerator compartment door of the refrigerator of the embodiment has reached the third position Upper perspective view of the refrigerator in the second embodiment of the present invention Top view of the refrigerator in Embodiment 2 of the present invention The block diagram of the self-closing function part in Embodiment 2 of this invention The principal part enlarged view of the door apparatus in Embodiment 2 of this invention. Operation diagram of door device in embodiment 2 of the present invention Operation diagram of door device in embodiment 2 of the present invention Operation diagram of door device in embodiment 2 of the present invention The principal part block diagram of the door apparatus in Embodiment 3 of this invention. The characteristic diagram in Embodiment 3 of this invention Operation diagram of door device in embodiment 3 of the present invention Operation diagram of door device in embodiment 3 of the present invention Main part block diagram of the door apparatus in Embodiment 4 of this invention 22 is a view of the door device according to the fourth embodiment of the present invention as viewed in the direction of arrow A in FIG. Operational diagram in Embodiment 4 of the present invention Operational diagram in Embodiment 4 of the present invention External perspective view of the main body using a conventional door device The perspective view of the upper part of the door device in the state where the door of the conventional door device is fully opened Disassembled perspective view of the upper part of a conventional door device An exploded perspective view of the lower part of a conventional door device

Explanation of symbols

20 Refrigerator 21 Heat insulation box (housing)
21a Front opening 28 Refrigerating room 32 Refrigerating room door (door)
36 Upper hinge (connection part)
37 Lower hinge (connecting part)
38 Base 39 Cover 40 Spring 42 Object 100 Refrigerator body 101 Hinge 110 Door 130 Self-closing function part 131 First mechanism 132 Second mechanism 133 Permanent magnet 134 Damper 135 First spring 137 Position detection switch 140 Connection part 230 Self-closing function Part 231 first mechanism 232 drive source 233 position detection switch 240 connection part 310 self-closing function part 313 elastic body 320 connection part 330 damper

Claims (11)

  A housing having a front opening, a door provided in the front opening, a connecting portion for rotatably connecting the door to the housing, and a self-closing function portion for performing an operation of closing the door. And a deceleration function part that decelerates the closing speed of the door when the door is closed, and the self-closing function part is provided on the housing side and connected to the door side facing the self-closing function part A refrigerator having a door device that is provided with a self-closing function by connecting the self-closing function portion and the connecting portion when the door is closed.   The refrigerator according to claim 1, wherein the self-closing function part and the deceleration function part are provided on a ceiling part of the housing.   The refrigerator according to claim 1, wherein the self-closing function unit and the deceleration function unit are provided at different locations from the connection unit.   The self-closing function part is provided with a movable first mechanism, and when the door is closed, the first mechanism pulls the connection part to the housing side to cause the door to self-close. The refrigerator as described in any one.   The refrigerator according to any one of claims 1 to 4, wherein the connecting portion is disposed on the connecting portion side of the door with respect to the center in the width direction of the door.   The refrigerator according to claim 4, wherein the front end of the first mechanism is located rearward of the front surface of the housing in a state where the first mechanism is moved forward.   The refrigerator according to any one of claims 1 to 6, wherein the connecting portion provided in the door protrudes in a convex shape toward the housing side of the door.   The refrigerator according to any one of claims 1 to 7, wherein the self-closing function portion and the connection portion are detachably coupled by a latch function.   The refrigerator according to any one of claims 1 to 7, wherein the self-closing function unit and the connection unit are detachably coupled by a magnetic force.   10. When the door is closed, after the self-closing function part and the connection part are coupled, the self-closing function part is configured to self-close the door by a self-closing force by an elastic body. The refrigerator according to one item.   11. The vehicle according to claim 1, wherein when the door is closed, the self-closing function portion and the connecting portion are connected to each other to start the self-closing operation, and then the deceleration of the door is started by the reduction device. The refrigerator described.

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