CN212154439U - Automatic door opening and closing device and refrigerator - Google Patents

Abstract

The utility model discloses an automatic door opening and closing device and refrigerator, it is used for realizing the automatic switching of the door body, include: the push rod is used for pushing the door body to open and pulling the door body to close; the first driving part is used for driving the push rod to move in a telescopic mode; the locking structure is used for realizing the locking and unlocking of the connection between the push rod and the door body, and is provided with a locking port arranged at the extending end of the push rod and a locking column which is arranged on the door body, can stretch out and draw back and is matched with the locking port. The locking structure is arranged, so that the connection between the push rod and the door body is favorably realized, the door body can be pushed open when the push rod extends outwards, and the door body can be driven to close when the push rod retracts inwards; the force on the push rod is favorably acted on the door body, and the connection and disconnection between the push rod and the door body are realized through the locking and unlocking of the locking structure; through setting up locking mouthful and telescopic lock post for realize locking and unblock between lock post and the push rod.

Description

Automatic door opening and closing device and refrigerator

Technical Field

The utility model belongs to the technical field of the refrigerator, concretely relates to automatic door opening and closing device and refrigerator.

Background

With the improvement of the living standard of residents, the refrigerator becomes a necessary household appliance, the volume of the refrigerator is also continuously enlarged, the door body of the refrigerator is heavier and heavier, and the door body of the refrigerator is more and more heavy, so that the refrigerator is inconvenient to open by people; in particular, in order to improve the sealing performance, the adopted door seal suction force is larger.

When the door body is opened, the force in the closing direction provided by the hinge piece and the suction force of the door seal need to be overcome, and a larger force needs to be provided. In order to realize easy door opening, an automatic door opening device is provided, after a door opening signal is received, the door body is pushed for a certain distance, and then the refrigerator door body is manually opened and closed.

After the automatic door opening device jacks the door body for a certain distance, waiting for a user to open the door; in practical application, it often happens that a user forgets to open the door at this time, the door body is always in a door opening state, internal temperature may be increased, food is deteriorated, and the refrigerator is in a continuous refrigeration state, so that energy waste is caused.

In addition, when the push rod pushes the door body to be opened, the push rod moves linearly, the door body rotates around the connecting shaft, namely, the contact area between the push rod and the door body is gradually reduced in the process that the push rod pushes the door body to be opened, and only a part of force on the push rod acts on the door body.

The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.

Disclosure of Invention

The utility model discloses to foretell problem among the prior art, provide an automatic door opening and closing device, can realize the automatic door body of opening and closing, avoid the door body to be in the state of opening always.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:

an automatic door opening and closing device for automatically opening and closing a door body, comprising:

the push rod is arranged in a telescopic mode and used for pushing the door body to open and pulling the door body to close;

the first driving part is used for driving the push rod to move in a telescopic mode;

the locking structure is used for realizing the locking and unlocking of the connection between the push rod and the door body, and is provided with a locking port arranged at the extending end of the push rod and a locking column which is arranged on the door body, can stretch out and draw back and is matched with the locking port.

Furthermore, the locking structure is also provided with a second driving part which is arranged on the door body and used for driving the lock cylinder to stretch and retract.

Furthermore, a connecting groove used for accommodating the extending end of the push rod is formed in the door body, and the lock cylinder is located in the connecting groove in a telescopic mode.

Furthermore, a second switch which is telescopic and used for pushing and triggering the push rod after the push rod stretches into the connecting groove is arranged at the connecting groove.

Furthermore, the locking opening is a strip-shaped opening in the left-right direction, and the locking column is a cylinder.

Furthermore, the push rod is provided with a push rod body and a hinge joint which is hinged to the end part of the push rod body, and the locking opening is formed in the hinge joint.

Furthermore, after the push rod pushes the second switch to retract, the second driving part is controlled to push the lock cylinder to extend out, and the connection between the push rod and the door body is locked.

Furthermore, after the push rod extends to the right position, the second driving part is controlled to push the lock column to retract, and unlocking of connection between the push rod and the door body is achieved.

Furthermore, after the push rod extends to the right position, the door body is not opened within a set time, the second driving part is controlled to push the lock column to extend, and the first driving part is controlled to drive the push rod to retract, so that the door body is driven to be closed.

Furthermore, the device also comprises a transmission part arranged between the first driving part and the push rod, and the push rod is provided with a rack meshed with the transmission part.

Furthermore, the device also comprises a base fixedly arranged on the box body, and the push rod can be positioned on the base in a front-back telescopic manner.

Furthermore, the device also comprises a first switch which is used for triggering after the push rod extends to the proper position and retracts to the proper position and used for powering off the power supply circuit of the first driving part.

Furthermore, the transmission part is provided with a first gear, a matching edge matched with the first switch is coaxially arranged on the first gear, and the matching edge is provided with a non-triggering section and triggering sections positioned at two ends of the non-triggering section.

Further, the distance between the triggering section and the first gear axis is smaller than the distance between the non-triggering section and the first gear axis.

Based on foretell automatic switch door gear, the utility model also provides a refrigerator with above-mentioned automatic switch door gear can realize the automatic door body of opening and closing, avoids the door body to be in the open mode always.

A refrigerator, comprising:

a box body;

the door body is hinged on the box body;

the automatic door opening and closing device is used for realizing automatic opening and closing of the door body.

Further, the automatic door opening and closing device is arranged on one side far away from the hinge shaft.

Compared with the prior art, the utility model discloses an advantage is with positive effect: the locking structure is arranged for realizing the locking and unlocking of the connection between the push rod and the door body; the push rod is connected with the door body, the door body can be pushed open when the push rod extends outwards, and the door body can be driven to close when the push rod retracts inwards; the push rod locking mechanism is beneficial to acting the force on the push rod on the door body, realizes connection and disconnection between the push rod and the door body through locking and unlocking of the locking structure, can retract the push rod after a user opens the door body, avoids the extending push rod from interfering the action or sight of the user, and avoids impacting the push rod. Through setting up locking mouthful and telescopic lock post for realize locking and the unblock between lock post and the push rod, realize the locking and the unblock of being connected between push rod and the door body.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when read in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of an automatic door opening and closing device according to the present invention;

FIG. 2 is a schematic view of the door shown in FIG. 1 after being opened by a user;

FIG. 3 is an enlarged schematic view of region A in FIG. 2;

FIG. 4 is a cross-sectional structural view of the automatic door closer shown in FIG. 1 after the middle door body is closed;

FIG. 5 is an enlarged schematic view of a portion of the structure of FIG. 4;

FIG. 6 is an enlarged schematic view of region B in FIG. 5;

FIG. 7 is an enlarged schematic view of a portion of the structure of FIG. 5;

FIG. 8 is a schematic structural view of the push rod moving forward to the door body;

FIG. 9 is an enlarged schematic view of a portion of the structure of FIG. 8;

FIG. 10 is an enlarged view of region C of FIG. 9;

FIG. 11 is a schematic sectional view taken along line D-D in FIG. 9;

FIG. 12 is an enlarged schematic view of region E in FIG. 11;

FIG. 13 is a schematic structural view of a door body pushed by a push rod during expansion;

FIG. 14 is an enlarged schematic view of a portion of the structure of FIG. 13;

FIG. 15 is an enlarged view of region F of FIG. 14;

fig. 16 is a schematic structural view of the door body opened by the user and the push rod retracted.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention.

In the description of the present invention, it should be noted that the directions or the positional relationships indicated by the terms "front", "rear", "left", "right", and the like are based on the positional relationships with respect to the user in the normal use state of the refrigerator. The terminology is for the purpose of describing the invention only and is not intended to be limiting of the invention since it is not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation. Moreover, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1 to 16, which are an embodiment of the automatic door opening and closing device provided by the present invention, an automatic door opening and closing device 300 is used for realizing the automatic opening and closing of the refrigerator door 200, and the automatic door opening and closing device 300 includes: the door locking device comprises a push rod 10, a first driving part 20 and a locking structure 30, wherein the push rod 10 is arranged on the box body 100 in a front-back telescopic mode, the push rod 10 can push the door body 200 to be opened when extending forwards, the push rod 10 can pull the door body 200 to be closed when retracting backwards, and the first driving part 20 is used for driving the push rod 10 to move in a telescopic mode. The locking structure 30 is arranged between the push rod 10 and the door body 200 and is used for realizing the locking and unlocking of the connection between the push rod 10 and the door body 200; namely, the connection and locking between the push rod 10 and the door body 200 can be realized through the locking structure, so that the push rod 10 can drive the door body 200 to move when moving, and the push rod 10 can drive the door body 200 to open and close when extending out and retracting; unlocking of the connection between the push rod 10 and the door body 200 may also be achieved, that is, the push rod 10 may be separated from the door body 200 such that the push rod 10 may be retracted after the door body 200 is opened by a user.

In the embodiment, the locking structure 30 is arranged between the push rod 10 and the door body 200 and used for realizing the locking and unlocking of the connection between the push rod 10 and the door body 200; the connection between the push rod 10 and the door body 200 is facilitated, the door body 200 can be pushed open when the push rod 10 extends outwards, and the door body 200 can be driven to close when the push rod 10 retracts inwards; the force on the push rod 10 is favorably acted on the door body 200, and the connection and disconnection between the push rod 10 and the door body 200 are realized through the locking and unlocking of the locking structure 30, so that the push rod can be retracted after a user opens the door body 200, the phenomenon that the extended push rod 10 interferes with the action or sight of the user is avoided, and the impact on the push rod 10 is avoided.

The door body 200 is hinged on the box body 100, and the push rod 10 is arranged on one side far away from the hinged shaft, so that the increase of the moment is facilitated, and the door body 200 is convenient to push away. After the push rod 10 pushes the door body 200 to open, the opening angle of the door body 200 is generally between 5 and 15 degrees, food is taken from the refrigerator, and the user needs to continuously open the door body 200 by hand; the force required by the user to open the device is now small.

In other embodiments, the push rod 10 may be disposed on the door body 200.

Referring to fig. 6, the locking structure 30 has a locking port 11 disposed at the extending end of the push rod 10, and a lock cylinder 32 disposed on the door body 200, the locking port 11 is disposed at one end of the push rod 10 close to the door body 200, the lock cylinder 32 is telescopically disposed, and the lock cylinder 32 is matched with the locking port 11; the lock hook 31 and the lock lever 32 have a locking state of fitting with each other and an unlocking state of being separable from each other. When the lock cylinder 32 extends into the locking opening 11, the locking of the locking structure 30 is realized; unlocking of the locking structure 30 is achieved when the lock cylinder 32 is retracted out of the locking opening 11.

When the push rod 10 pushes to open the door body 200 and pulls to close the door body 200, the locking port 11 and the lock cylinder 32 are locked with each other, so that the push rod 10 and the door body 200 are connected and locked. After the push rod 10 pushes the door body 200, the locking port 11 and the lock cylinder 32 are in an unlocking state which can be separated from each other, and after the door body 200 is continuously opened by a user, the push rod 200 retracts; if the user does not continue to open the door 200 within the set time, the door 200 needs to be closed, that is, the locking opening 11 and the lock cylinder 32 are locked with each other, and the push rod 10 is retracted backwards to drive the door 200 to close. When the door body 200 is in the closed state, the locking structure 30 may be in the locked state, may also be in the unlocked state, or may be in the mutually separated state; the locking structures 30 are preferably provided in a mutually separated state.

The locking structure 30 further has a second driving member 31 provided on the door body 200 for driving the lock cylinder 32 to extend and contract. The extension and retraction of the lock cylinder 32 is controlled by the second driving member 33, and the locking notch 11 and the lock cylinder 32 are locked with or released from each other.

Referring to fig. 3, a connecting groove 201 is formed on the door body 200 for accommodating the extending end of the push rod 10, so that the locking opening 11 extends into the connecting groove 201, and the lock cylinder 32 is telescopically located in the connecting groove 201. The second switch 33 is arranged at the connecting groove 201, the second switch 33 can be extended and contracted in the front and back direction, and the second switch 33 is used for pushing the second switch 33 to move after the push rod 10 extends into the connecting groove 201 and triggering the second switch 33. A telescopic second switch 33 is arranged, after the extending end of the push rod 10 extends into the connecting groove 201, the push rod pushes the second switch 33 to move backwards, and the second switch 33 is triggered; and then controls the second driving part 31 to start, and pushes the lock cylinder 32 to extend. After the locking opening 11 is in place, the locking column 32 is pushed to extend out, so that the locking column 32 extends into the locking opening 11, and the connection and locking between the push rod 10 and the door body 200 are realized.

Preferably, the locking slot 11 is a left-right strip and the lock cylinder 32 is a cylinder. During the process that the push rod 10 pushes the door body 200 to open, the push rod 10 moves linearly forward, the door body 200 moves rotationally around the hinge shaft thereof, and thus the lock cylinder 32 moves in the locking opening 11 along with the opening of the door body 200.

In other embodiments, the push rod 10 may also be provided with a push rod body and a hinge joint hinged at the end of the push rod body, and the locking port 11 is opened on the hinge joint; during the opening process of the door body 200, the hinge head and the door body 200 are relatively stationary through the rotation of the hinge head.

After the push rod 10 extends to the proper position, the second driving part 31 is controlled to push the lock cylinder 32 to retract, so that the connection between the push rod 10 and the door body 200 is unlocked. At this time, the user can open the door body 200, and if the door body 200 is not opened by the user within a set time, the second driving part 31 is controlled to push the lock cylinder 32 to extend out, so that the locking port 11 and the lock cylinder 32 are locked with each other; and then, the first driving part 20 is started to drive the push rod 10 to retract, so that the door body 200 is driven to close.

Referring to fig. 5, the automatic door opening and closing apparatus 300 further includes a transmission member 50 disposed between the first driving member 20 and the push rod 10, and a rack gear 13 engaged with the transmission member 50 is provided on the push rod 10, and by further providing the rack gear 13, it is advantageous to ensure that a large force is transmitted to the push rod 10 and to ensure the telescopic movement of the push rod 10. The automatic door opening and closing device 300 further includes a base 90 fixed on the box 100, and the push rod 10 is located in a slide way on the base 90 and can be extended back and forth.

The transmission component 50 is a gear set, the first driving component 20 is a motor, and after the first driving component 20 rotates in the forward direction, the first driving component 20 can drive the transmission component 50 to rotate, so that the rack 13 moves forward, and the push rod 10 extends forward; after the push rod 10 is extended forward to the proper position, the first driving part 20 is powered off and stops. After the first driving part 20 rotates reversely, the first driving part 20 can drive the transmission part 50 to rotate, so that the rack 13 moves backwards, and the push rod 10 retracts backwards; after the push rod 10 retracts backward to the proper position, the first driving part 20 is powered off and stops.

Referring to fig. 7, in order to realize the automatic stop of the first driving part 20 after the push rod 10 moves to the proper position, a first switch 61 for powering off the power supply circuit of the first driving part 20 is provided, the first switch 61 is triggered after the push rod 10 extends to the proper position and retracts to the proper position, and the main controller controls the power supply circuit of the first driving part 20 to be powered off, so that the first driving part 20 stops. Specifically, the transmission member 50 has a first gear 51, a matching edge 62 is coaxially disposed on the first gear 51, the matching edge 62 is matched with the first switch 61, and the matching edge 62 has a non-triggering section 621 and triggering sections 622 located at two ends of the non-triggering section 621; when the push rod 10 moves telescopically, the first gear 51 rotates, and the first switch 61 abuts against the non-trigger section 621, so that the first switch 61 is in a closed state, and the first switch 61 and the matching edge 62 move relatively; when the push rod 10 is extended to the right or retracted to the right, the first switch 61 is contacted with the non-triggering section 621 to the triggering section 622, and the first switch 61 is triggered. The first switch 61 is a microswitch, and the triggering of the first switch 61 can be realized when the triggering section 62 is reached by setting the distance between the non-triggering section 621 reaching the triggering section 62 and the first switch 61 to be different. When the push rod 10 starts to extend or lock in, the first switch 61 contacts with the trigger section 622, and starts to rotate at the first driving part 20, so as to drive the first gear 51 to rotate, and the first switch 61 contacts with the non-trigger section 621; that is, after the first gear 51 starts to rotate, the first switch 61 is transited from the contact with the non-trigger section 621 to the contact with the trigger section 622, and preferably, an arc-shaped transition section is provided between the trigger section 622 and the non-trigger section 621 to facilitate the transition of the first switch 61 in contact with the mating edge 62. Preferably, the distance between the triggering section 622 and the axis of the first gear 51 is smaller than the distance between the non-triggering section 621 and the axis of the first gear 51.

In other embodiments, the distance between the triggering section 622 and the axis of the first gear 51 may be larger than the distance between the non-triggering section 621 and the axis of the first gear 51.

Referring to fig. 1 to 16, the operation of the automatic door opening and closing apparatus 300 is explained, which includes the following steps:

s10, the first driving part 20 is activated to drive the push rod 10 to move outwards, so that the locking structures are locked with each other, and the door 200 is pushed to open.

After the main controller receives an instruction of opening the door body 200, the first driving part 20 is started to rotate in the forward direction, and the push rod 10 is driven to extend forwards through the transmission part 50; when the extending end of the lock push rod 10 extends into the connecting groove 201, the push rod pushes the second switch 33 to move backwards, and the second switch 33 is triggered; further controlling the second driving component 31 to start, pushing the lock cylinder 32 to extend out, so that the lock cylinder 32 extends into the locking port 11, and realizing the connection and locking between the push rod 10 and the door body 200; thereafter, the push rod 10 continues to move forward, so that the door body 200 is opened.

S20, after the push rod 10 extends and moves to the right position, the first driving part 20 stops, and the locking structure is unlocked.

When the push rod 10 extends and moves to the position, the first switch 61 is triggered, so that the first driving part 20 stops; the second driving part 31 is started to drive the lock cylinder 32 to retract, and the lock port 11 and the lock cylinder 32 are unlocked.

S30, judging whether the door body 200 is continuously opened by the user within the set time, if so, entering the step S40; otherwise, the process proceeds to step S50.

S40, starting the first driving part 20 to rotate reversely to drive the push rod 10 to retract backwards; the user closes the door body 200 after taking food.

And S50, locking the locking structure, starting the first driving part 20 to rotate reversely, driving the push rod 10 to retract backwards, and closing the door body 200.

The second driving part 31 is started to push the lock cylinder 32 to extend out, so that the lock cylinder 32 extends into the locking port 11, and the connection and locking between the push rod 10 and the door body 200 are realized; and then, the first driving part 20 is started to rotate reversely, so that the push rod 10 retracts backwards, and the door body 200 is driven to close. After the door body 200 is closed, the second driving part 31 is started to drive the lock column 32 to retract, so that the locking port 11 and the lock column 32 are unlocked; the push rod 10 then continues to lock backwards and, after retracting into position, triggers the first switch 61, causing the first drive member 20 to stop.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or that equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention, which is claimed.

Claims (10)

1. An automatic door opening and closing device, characterized in that, it is used for realizing the automatic opening and closing of door body, includes:

the push rod is arranged in a telescopic mode and used for pushing the door body to open and pulling the door body to close;

the first driving part is used for driving the push rod to move in a telescopic mode;

the locking structure is used for realizing the locking and unlocking of the connection between the push rod and the door body, and is provided with a locking port arranged at the extending end of the push rod and a locking column which is arranged on the door body, can stretch out and draw back and is matched with the locking port.

2. The automatic door opening and closing device as claimed in claim 1, wherein the locking structure further has a second driving part provided on the door body for driving the lock cylinder to extend and contract.

3. The automatic door opening and closing device as claimed in claim 1, wherein the door body is provided with a connecting groove for accommodating the extending end of the push rod, and the lock cylinder is telescopically positioned in the connecting groove.

4. The automatic door opening and closing device as claimed in claim 3, wherein a second switch is provided at the connection recess, which is retractable and is adapted to be actuated by the push of the push rod after the push rod is inserted into the connection recess.

5. The automatic door opening and closing device according to any one of claims 1 to 4, wherein the locking hole is a left-right direction strip-shaped hole, and the lock cylinder is a cylindrical hole.

6. The automatic door opening and closing device according to any one of claims 1 to 4, wherein the push rod has a push rod body and a hinge head hinge-coupled to an end of the push rod body, and the locking port is opened to the hinge head.

7. The automatic door opening and closing device as claimed in claim 2, wherein after the push rod is extended to the proper position, the door body is not opened within a set time, the second driving part is controlled to push the lock cylinder to extend, and the first driving part is controlled to drive the push rod to retract, so that the door body is driven to close.

8. The automatic door opening and closing device as claimed in any one of claims 1 to 4, further comprising a first switch for de-energizing the first driving means power supply circuit, which is triggered after the push rod is extended to a proper position and retracted to a proper position.

9. The automatic door opening and closing device according to claim 8, further comprising a transmission member disposed between the driving member and the push rod, the transmission member having a first gear on which an engaging edge for engaging with the first switch is coaxially disposed, the engaging edge having a non-triggering section and triggering sections disposed at both ends of the non-triggering section.

10. A refrigerator, characterized by comprising:

a box body;

the door body is hinged on the box body;

the automatic door opening and closing device according to any one of claims 1 to 9, which is used for realizing automatic opening and closing of the door body.

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