CN217681099U - Automatic door closing mechanism and cooking utensil with same - Google Patents

Abstract

The utility model provides an automatic door closing mechanism, include: the door body assembly comprises a door body assembly (1), a fixed door hook (4) fixed on the door body assembly (1) and a door closing assembly (6). The fixed door hook (4) has a fixed door hook end (401). The door closing assembly (6) comprises: an interlocking support base (601) provided with an interlocking support self-locking arm guide rail (601 f) with an interlocking support self-locking arm clamping part (601 g); an interlock support upper cover (611) coupled to the interlock support base (601); a movable chassis (612) capable of horizontal movement; and one end of the tension spring (609) is fixed on the interlocking support seat (601), and the other end of the tension spring is fixed on the movable case (612).

Description

Automatic door closing mechanism and cooking utensil with same

Technical Field

The utility model relates to an electric appliance field is used in the kitchen, especially relates to an automatic door mechanism and have cooking utensil of this automatic door mechanism of closing.

Background

A box-type cooking appliance such as a microwave oven or an oven is generally provided with a door assembly that is provided on a box body of the box-type cooking appliance so as to be openable and closable. As the living standard of people is continuously improved, people increasingly need cooking utensils with higher convenience.

The door body assembly of the existing microwave oven and oven is not provided with a buffer design generally, so that more noise is brought. In order to minimize the noise during use, microwave ovens with door closing cushioning mechanisms have been proposed. The movable sliding block with a reset tension spring is arranged and runs in a variable track extending in a downward angle direction, the movable sliding block is self-locked at a starting position/standby position when the door is opened under the action of gravity and tension force of the tension spring, the mechanical balance of the movable sliding block at the starting position is broken through by triggering cam contact when the door is closed, the sliding block is driven to move by the force generated by the reset of the tension spring, and self-absorption door closing is realized. Therefore, the microwave oven with the door closing buffer mechanism can reduce the used noise on the one hand, and further improve the use convenience by realizing the self-suction door closing effect on the other hand.

However, in the prior art design of automatic closing or slow closing, the products are mainly concentrated on downward and upward opening, and the buffering structure is usually designed at the position of the hinge and one end of the handle, so that the space is sufficient and the realization is easy. However, in the cooking appliance products such as microwave ovens and ovens with side hung doors, it is inconvenient to add a buffer mechanism at the door hinge due to the small space and structure. In addition, in the conventional buffering door closing device, a mechanism such as a track with an angle and a cam is generally used, and the mechanism needs to be involved in gravity to balance the gravity and the spring tension applied to the slider to form a force system, so that the slider is finally self-locked on the inclined surface. However, the slow closing door structure requires a large space for installation, so that the slow closing door structure is poor in universality and high in production cost.

Therefore, there is a need for improvements to existing automatic door closing mechanisms to increase their versatility and reduce production costs.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an automatic door closing mechanism, include:

a door body assembly;

the fixed door hook is fixedly arranged on the door body assembly and is provided with a fixed door hook end part extending outwards; and

a door closing assembly comprising:

an interlocking support base on which an interlocking support self-locking arm rail extending in the horizontal direction is provided, and an interlocking support self-locking arm retaining portion at an outer end of the interlocking support self-locking arm rail,

-an interlock bearing upper cover, which can be joined to the interlock bearing,

-a movable chassis arranged between said interlocking bearing block and said interlocking bearing upper cover, said movable chassis being movable in a horizontal direction with respect to said interlocking bearing block and said interlocking bearing upper cover;

a tension spring, which is arranged between the interlocking bearing seat and the interlocking bearing upper cover, wherein one end of the tension spring is fixedly installed on the interlocking bearing seat, and the other end of the tension spring is fixedly connected to the movable case;

wherein, under the door opening state, the movable chassis is stopped by the interlocking support self-locking arm clamping part; in the door closing process, the end part of the fixed door hook can be combined with the movable case, and the fixed door hook moves along with the movable case in the same door closing direction under the action of the tension spring.

Preferably, the movable chassis comprises:

the locking rocker and the self-locking rocker are rotatably arranged in the shell of the movable case;

the driving arm can move up and down and is movably connected with one end of the locking rocker and one end of the self-locking rocker;

the self-locking rocker comprises a self-locking arm which can move up and down, and the self-locking arm is movably connected with the other end of the self-locking rocker;

the locking arm can move up and down and is movably connected with the other end of the locking rocker; and

one end of the case pressure spring is fixedly connected with the lower end face of the driving arm, and the other end of the case pressure spring is in slidable abutting connection with the inner side wall face of the movable case. The driving arm is movably connected with one end of the locking rocker and one end of the self-locking rocker through a first rotating shaft; the self-locking arm is movably connected with the self-locking rocker through a second rotating shaft; the locking arm is movably connected with the locking rocker through a third rotating shaft.

Preferably, the shell of the movable chassis is composed of a lower chassis shell and an upper chassis shell which can be combined with each other; a positioning hole aligned with the driving arm is formed in the top wall surface of the upper case shell of the case, and the driving arm can move upwards to penetrate through the positioning hole aligned with the driving arm; a positioning hole aligned with the self-locking arm is formed in the bottom wall surface of the lower case shell, and the self-locking arm can move downwards to penetrate through the positioning hole aligned with the self-locking arm; and a positioning hole aligned with the locking arm is formed in the top wall surface of the upper case shell, and the locking arm can move upwards to penetrate through the positioning hole aligned with the locking arm.

Preferably, the fixed door hook end portion comprises: a first fixed door hook driving surface which is arranged in an inclined angle; a second fixed door hook driving surface provided on a bottom edge side of an end of the fixed door hook; a third fixed door hook driving surface arranged on the inner edge side of the end part of the fixed door hook; a fourth fixed door hook driving surface provided on an outer edge side of the end of the fixed door hook. The first fixed door hook driving surface is arranged between the second fixed door hook driving surface and the fourth fixed door hook driving surface.

Preferably, the door closing assembly further comprises a damper, and the movable case further comprises a damper clamping part; along with the movement of the movable case, the damper clamping part can be contacted with the movable end of the damper.

Preferably, the automatic door closing mechanism further comprises a movable door hook and a door hook tension spring, wherein the movable door hook is slidably mounted in the fixed door hook; one end of the door hook tension spring is connected with the movable door hook, and the other end of the door hook tension spring is connected with the door body assembly.

Preferably, the movable door hook includes a movable door hook end portion protruding outward, the movable door hook end portion being formed as a bent hook portion and having a first movable door hook slope surface toward an outer edge side and a second movable door hook slope surface toward an inner side; the interlocking support base is also provided with a first interlocking support movable door hook ramp extending along the inclined upward direction and a second interlocking support movable door hook ramp extending along the inclined downward direction and continuing to the first interlocking support movable door hook ramp; during closing, the first hook ramp contacts the first interlock support hook ramp or the second hook ramp contacts the second interlock support hook ramp.

Preferably, the door closer assembly further comprises, between the interlock support base and the interlock support upper cover:

a drive rack movable in a horizontal direction, the fourth fixed hook drive surface at the end of the fixed hook being capable of contacting the drive rack during closing;

the driving rack is in meshed transmission with the gear;

the driven rack can move along the horizontal direction, and the gear is in meshed transmission with the driven rack;

and one end of the rack tension spring is fixed on the interlocking supporting seat, and the other end of the rack tension spring is fixedly connected with the driven rack.

Preferably, the door closing assembly further comprises: a first microswitch, a second microswitch and a third microswitch; when the door body assembly is located at a complete closing position, the first microswitch is triggered by the first movable door hook inclined plane, and the second microswitch and the third microswitch are triggered by the driven rack.

The utility model also provides a cooking utensil, it has as above automatic door closing mechanism.

According to the automatic door closing mechanism and the cooking utensil with the automatic door closing mechanism, the effect of automatic door closing of the door body assembly can be realized only by giving a very small initial kinetic energy to the door body assembly; meanwhile, the door can be slowly closed, and the noise generated when the door is closed is greatly reduced; the compact structure and stable operation are realized; and the utility model discloses an automatic door closing mechanism has high commonality, and its structure is easily processed to reduction in production cost.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention, but do not constitute a limitation of the invention.

Fig. 1 is a schematic overall structure diagram showing relevant components of the automatic door closing mechanism of the present invention disposed on a box-type cooking appliance;

fig. 2 is an exploded schematic view showing the automatic door closing mechanism of the present invention;

fig. 3a and 3b are schematic structural diagrams illustrating the front and back of the door closing assembly in the automatic door closing mechanism of the present invention;

fig. 4 is a schematic structural view of the door body assembly and the door closing assembly in an open state in the automatic door closing mechanism of the present invention;

fig. 5 is a schematic structural view of a movable door hook, a fixed door hook and a door closing assembly in the automatic door closing mechanism of the present invention;

fig. 6 is another schematic structural diagram of the movable door hook, the fixed door hook and the door closing assembly in the automatic door closing mechanism of the present invention;

fig. 7 is another schematic structural diagram of the movable door hook, the fixed door hook and the door closing assembly in the automatic door closing mechanism of the present invention;

fig. 8 is a schematic structural view of the automatic door closing mechanism of the present invention, in which the movable door hook and the fixed door hook start to move toward the door closing assembly;

fig. 9 is a schematic structural view of the movable door hook and the fixed door hook of the automatic door closing mechanism of the present invention moving further to the door closing assembly than fig. 8;

fig. 10 is a schematic structural view illustrating the movable door hook and the fixed door hook of the automatic door closing mechanism of the present invention moving further to the door closing assembly than fig. 9;

fig. 11 is a schematic structural view illustrating the movable door hook and the fixed door hook of the automatic door closing mechanism of the present invention moving further to the door closing assembly than fig. 10;

fig. 12 is a schematic structural view illustrating the movable door hook and the fixed door hook of the automatic door closing mechanism of the present invention moving further to the door closing assembly than fig. 11;

fig. 13 is a schematic structural view illustrating the movable door hook and the fixed door hook of the automatic door closing mechanism of the present invention moving further to the door closing assembly than fig. 12;

fig. 14 is a schematic structural view of the movable door hook and the fixed door hook of the automatic door closing mechanism of the present invention moving in a direction away from the door closing assembly;

fig. 15 is a schematic structural view illustrating the movable door hook and the fixed door hook of the automatic door closing mechanism of the present invention moving further away from the door closing assembly than fig. 14;

fig. 16 is a schematic structural view illustrating that the movable door hook and the fixed door hook of the automatic door closing mechanism of the present invention move further in the direction away from the door closing assembly than fig. 15.

Fig. 17 is a schematic structural view of the automatic door closing mechanism of the present invention, in which the movable door hook, the fixed door hook and the door closing assembly are in the open state.

Description of reference numerals:

1-door body assembly 101-upper door spindle

102-Upper door-Axis support 103-door-body frame

103 a-door frame tension spring hook 104-lower door shaft support

105-lower door shaft 2-movable door hook

201-first moving door hook guide 202-moving door hook

203-second moving hook guide 204-moving hook end

204 a-first movable door hook ramp 204 b-second movable door hook ramp

3-door hook tension spring 4-fixed door hook

401-fixed door hook end 401 a-first fixed door hook drive face

401 b-second fixed door hook drive face 401 c-third fixed door hook drive face

401 d-fourth fixed door hook driving surface 402-fixed door hook screw post

5-front plate 6-door closing assembly

601-interlock support 601 a-first interlock support track

601 b-second interlocking bearing block track 601 c-third interlocking bearing block track

601 d-first interlock support fly hook ramp 601 e-second interlock support fly hook ramp

601 f-interlocking support self-locking arm guide rail 601 g-interlocking support self-locking arm clamping part

602-first microswitch 602 a-first microswitch contact

603-rack tension spring 604-driven rack

604 a-driven rack ramp 604 b-first driven rack guide

604 c-driven rack installation indication arrow 604 d-driven rack end face

604 e-second driven rack guide 605-gear

606-second microswitch 606 a-second microswitch contact

607-third microswitch 607 a-third microswitch contact

608-drive rack 608 a-second drive rack guide

608 b-first drive rack guide 608 c-drive rack installation indication arrow

608 d-driving rack end 609-tension spring

610-damper 611-interlocking support upper cover

611 a-first interlocking support upper cover rail 611 b-second interlocking support upper cover rail

611 c-third interlocking support Upper cover Rail 612-Movable Chassis

612 a-first shaft 612 b-second shaft

612 c-self-locking arm 612 d-self-locking rocker

612 e-case pressure spring 612 f-case lower shell

612 g-third rotating shaft 612 h-locking rocker

612 i-locking arm 612 j-driving arm

612 k-Chassis Upper Shell 612 m-first Chassis guide

612 n-second chassis guide 612 p-damper detent

612 r-movable case buckle 612 s-movable case fixing screw

Detailed Description

Various exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is not intended to limit the invention, its application, or uses. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. It should be noted that: the relative arrangement of parts and steps set forth in these embodiments should be construed as exemplary only and not as limiting unless otherwise specifically noted.

Fig. 1 shows an overall structure diagram of relevant components of the automatic door closing mechanism of the present invention, which is arranged on a cooking appliance such as a microwave oven, an oven, etc. Wherein, the utility model discloses an automatic door closing mechanism includes: the door body assembly comprises a door body assembly 1, a movable door hook 2, a door hook tension spring 3, a fixed door hook 4 and a door closing assembly 6.

The door body assembly 1 is pivotally arranged on a box body of the cooking appliance, and the door closing assembly 6 is fixedly arranged in the box body of the cooking appliance. The door closing assembly 6 may be fixedly connected to the front plate 5, which is a part of the cooking appliance cabinet, or may be fixedly mounted on the bottom plate of the cabinet.

As shown in fig. 1, the door assembly 1 is horizontally pivotable with respect to the cooking appliance. Further, the fixed door hook 4 is fixedly installed on the door body assembly 1, and the movable door hook 2 is slidably installed in the fixed door hook 4. One end of the door hook tension spring 3 is connected with the movable door hook 2, and the other end of the door hook tension spring 3 is connected with the door body assembly 1.

As further shown in fig. 2, the door body assembly 1 includes: a door frame 103, an upper door shaft supporter 102 at an upper end of the door frame 103, an upper door shaft 101 fixedly installed in the upper door shaft supporter 102, a lower door shaft supporter 104 at a lower end of the door frame 103, and a lower door shaft 105 fixedly installed in the lower door shaft supporter 104. The upper door shaft 101 and the lower door shaft 105 are aligned in the vertical direction, and the door body assembly 1 can be pivoted around the axis of the upper door shaft 101 and the lower door shaft 105 by installing the upper door shaft 101 and the lower door shaft 105 into the rotating shaft installation hole of the cooking appliance. Further, a tension spring hook 103a is provided in the door frame 103, so that the other end of the door hook tension spring 3 can be connected to the door unit 1 by being hooked on the tension spring hook 103 a.

As shown in fig. 2 and 5, the movable door hook 2 includes: a first moving hook guide 201, a moving hook 202, a second moving hook guide 203, and an outwardly extending moving hook end 204. The first moving door hook guide 201 can be slidably installed in the door body assembly 1. One end of the door hook tension spring 3 can be hung and buckled with the movable door hook 202, so that the door hook tension spring 3 is connected with the movable door hook 2. The second movable door hook guide 203 can be slidably mounted into the fixed door hook 4. The movable door hook end 204 is formed as a bent hook portion, and has a first movable door hook slope 204a on the outer edge side and a second movable door hook slope 204b on the inner side.

Referring to fig. 2, 5 and 7, the fixed door hook 4 includes an outwardly projecting fixed door hook end 401. Wherein the fixed door hook end 401 comprises: a first fixed door hook driving surface 401a disposed at an oblique angle; a second fixed door hook driving surface 401b provided on the bottom edge side of the fixed door hook end portion 401; a third fixed door hook driving surface 401c provided on the inner edge side of the fixed door hook end portion 401; and a fourth fixed door hook driving surface 401d provided on an outer edge side of the fixed door hook end portion 401. Wherein the first fixed door hook driving surface 401a is disposed between the second fixed door hook driving surface 401b and the fourth fixed door hook driving surface 401 d. The fixed door hook 4 is also provided with a fixed door hook screw post 402. The fixed door hook 4 can be fixed to the door body assembly 1 by the fixed door hook screw post 402.

As shown in fig. 2 to 7, the door closing assembly 6 includes: the interlocking device comprises an interlocking support base 601, an interlocking support upper cover 611 which can be combined on the interlocking support base 601, and a first microswitch 602, a rack tension spring 603, a driven rack 604, a gear 605, a second microswitch 606, a third microswitch 607, a driving rack 608, a tension spring 609, a damper 610 and a movable case 612 which are arranged between the interlocking support base 601 and the interlocking support upper cover 611.

The interlocking support 601 is provided with a first interlocking support rail 601a, a second interlocking support rail 601b, and a third interlocking support rail 601c. The first, second, and third interlock support base rails 601a, 601b, 601c are all configured to extend in a horizontal direction.

The interlock support base 601 is further provided with a first interlock support movable hook ramp 601d and a second interlock support movable hook ramp 601e continuous with the first interlock support movable hook ramp 601d. Among them, the first interlock support movable door hook ramp 601d is provided to extend in an obliquely upward direction, and the second interlock support movable door hook ramp 601e is provided to extend in an obliquely downward direction.

The interlock support 601 is further provided with an interlock support self-locking arm guide 601f extending in the horizontal direction, and an interlock support self-locking arm locking portion 601g is provided at an outer end of the interlock support self-locking arm guide 601 f.

The interlocking support upper cover 611 is provided with a first interlocking support upper cover rail 611a, a second interlocking support upper cover rail 611b, and a third interlocking support upper cover rail 611c. First, second, and third interlock support upper cover rails 611a, 611b, and 611c are provided to extend in the horizontal direction and are aligned with the first, second, and third interlock support base rails 601a, 601b, and 601c, respectively.

The first microswitch 602 has a first microswitch contact 602a. When the first micro switch contact 602a is pressed, a first control circuit in the cooking appliance can be turned on, and thus the control unit of the cooking appliance can receive a signal that the first control circuit is turned on.

One end of a rack tension spring 603 is fixed on the interlocking support 601, and the other end of the rack tension spring 603 is fixedly connected with a driven rack 604.

The driven rack 604 is slidably mounted on the interlock support 601, and the driven rack 604 is slidable in the horizontal direction with respect to the interlock support 601. A gear 605 is rotatably mounted on the interlock support 601, and the gear 605 is in meshing transmission with the driven rack 604. The driving rack 608 is slidably mounted on the interlocking support 601, the driving rack 608 is also slidable relative to the interlocking support 601 along the horizontal direction, and the driving rack 608 is in meshing transmission with the gear 605. Thus, when the driving rack 608 slides in the horizontal direction relative to the interlock support 601, the gear 605 is rotated, and the driven rack 604 can be driven by the gear 605 to slide in the horizontal direction relative to the interlock support 601. At this time, the driving rack 608 moves in the opposite direction to the driven rack 604.

In the driven rack 604, a driven rack slope 604a is provided along an inclination angle; a driven rack end surface 604d is formed on one end side of the driven rack 604. The driven rack 604 is further provided with a first driven rack guide 604b and a second driven rack guide 604e. The first and second driven rack guides 604b and 604e may be shaft-type guide members extending from both side surfaces of the driven rack 604, and may be engaged with the first interlock support upper cover rail 611a and the first interlock support rail 601a so as to guide the driven rack 604 to move in the horizontal direction. Preferably, the driven rack 604 is further provided with a driven rack installation indication arrow 604c for indicating the installation location.

The drive rack 608 includes: a first drive rack guide 608b and a second drive rack guide 608a. The first driving rack guide 608b and the second driving rack guide 608a may be shaft-type guide members protruding on both side surfaces of the driving rack 608, and may be engaged with the second interlock support upper cover rail 611b and the second interlock support rail 601b so as to guide the driving rack 608 to move in the horizontal direction. A driving rack end surface 608d is also provided on one end side of the driving rack 608. Preferably, the drive rack 608 also includes a drive rack mounting indication arrow 608c for indicating a mounting location.

Preferably, an indication arrow for indicating the installation position is provided on the gear 605.

The second microswitch 606 has a second microswitch contact 606a. When the second micro switch contact 606a is pressed, a second control circuit in the cooking appliance can be turned on, and thus the control unit of the cooking appliance can receive a signal that the second control circuit is turned on.

The third microswitch 607 has a third microswitch contact 607a. When the third microswitch contact 607a is pressed, a third control circuit in the cooking appliance can be turned on, so that the control unit of the cooking appliance can receive a signal that the third control circuit is turned on.

One end of a tension spring 609 is fixedly arranged on the interlocking bearing 601, and the other end is fixedly connected to the movable chassis 612.

The movable chassis 612 includes: the lower chassis shell 612f and the upper chassis shell 612k, which may be combined with each other to form a housing of the movable chassis. In the movable chassis 612, a first rotating shaft 612a, a second rotating shaft 612b, a self-locking arm 612c, a self-locking rocker 612d, a chassis pressure spring 612e, a third rotating shaft 612g, a locking rocker 612h, a locking arm 612i, and a driving arm 612j are installed inside a chassis lower shell 612f and a chassis upper shell 612k. The structures of the components inside the lower case 612f and the upper case 612k and the connection relationship therebetween will be described in detail below.

The locking rocker 612h and the self-locking rocker 612d have protruding shafts at two sides of their middle portions, and the locking rocker 612h and the self-locking rocker 612d can be rotatably mounted in the movable chassis 612 through the protruding shafts, that is, rotatably mounted on the combined chassis lower shell 612f and chassis upper shell 612k.

As shown in fig. 2, lock rocker 612h is located in the left portion of movable chassis 612 and lock rocker 612d is located in the right portion of movable chassis 612. The end of the locking rocker 612h close to the inner side, the end of the self-locking rocker 612d close to the inner side and the end of the driving arm 612j are respectively provided with a shaft hole, and the first rotating shaft 612a sequentially penetrates through the shaft holes to enable the locking rocker 612h, the self-locking rocker 612d and the driving arm 612j to be movably connected. Further, a first groove rail for guiding the driving arm 612j and the first rotation shaft 612a to move up and down is provided on an inner wall surface of the movable chassis 612, at least on an inner wall surface of the upper chassis housing 612k. A positioning hole aligned with the driving arm 612j is formed in the top wall surface of the upper housing 612k. The drive arm 612j is able to move upward through a positioning aperture aligned with the drive arm 612j.

The lower end surface of the driving arm 612j is fixedly connected with one end of a chassis pressure spring 612 e. The other end of the chassis compression spring 612e abuts against the inner side wall surface of the chassis lower shell 612 f. The inner side wall surface of the lower casing 612f is a horizontal wall surface that allows the other end of the casing compression spring 612e to slide thereon in abutment.

Shaft holes are formed in one end of the self-locking arm 612c and one end of the self-locking rocker 612d close to the outer side, and the self-locking arm 612c is movably connected with the self-locking rocker 612d through the two shaft holes by the second rotating shaft 612b passing through the two shaft holes in sequence. Further, a second groove for guiding the up-and-down movement of the self-locking arm 612c is provided on at least the inner wall surface of the lower casing 612f of the inner wall surface of the movable casing 612. A positioning hole aligned with the self-locking arm 612c is provided in the bottom wall surface of the chassis lower case 612 f. Self-locking arm 612c can move downward through the alignment aperture aligned with self-locking arm 612 c.

Shaft holes are formed in one end of the locking arm 612i and one end, close to the outer side, of the locking rocker 612h, and the third rotating shaft 612g sequentially penetrates through the two shaft holes to enable the locking arm 612i to be movably connected with the locking rocker 612 h. Further, on the inner side wall surface of the movable chassis 612, at least on the inner side wall surface of the upper chassis 612k, a third groove rail for guiding the up-and-down movement of the lock arm 612i is provided. A positioning hole is provided in the top wall of the upper housing 612k to align with the latch arm 612 i. The latch arm 612i can move upward through a detent hole aligned with the latch arm 612 i.

The active chassis 612 further includes: a first chassis guide 612m, a second chassis guide 612n, a damper detent 612p, and movable chassis securing screws 612s. The first chassis guide 612m and the second chassis guide 612n are disposed on outer sides of two sidewalls of the movable chassis 612, and can be engaged with the third interlocking support base rail 601c and the third interlocking support upper cover rail 611c, so that the movable chassis 612 can be guided to move in the horizontal direction with respect to the interlocking support base 601 and the interlocking support upper cover 611.

The damper retaining portion 612p is provided at the lower end of the lower case 612 f. The damper catching portion 612p can come into contact with the movable end of the damper 610 as the movable chassis 612 moves.

The upper chassis shell 612k and the lower chassis shell 612f are connected by the movable chassis snap 612r and the movable chassis fixing screw 612s, so that a complex mechanism can be packaged in the smaller movable chassis 612. The utility model discloses a preferred 32 x 12 x 16mm of activity machine case size is comparatively small and exquisite, compact structure.

The operation principle of the automatic door closing mechanism of the present invention will be specifically described below.

As shown in fig. 8, after the door closing operation is started, the fixed door hook 4 and the movable door hook 2 are rotated in the arrow direction about the upper door shaft 101 and the lower door shaft 105 shown in fig. 2. In the initial state, the rack tension spring 603 is in a stretched state. The driven rack mount indicator arrow 604c, the drive rack mount indicator arrow 608c, and the indicator arrow of the pinion 605 are aligned. The movable chassis 612 is in a standby state in which the self-locking arm 612c is locked at the interlocking support self-locking arm locking portion 601g due to the chassis compression spring 612 e. That is, the movable housing 612 is stopped by the interlock support self-locking arm stopper portion 601g, and the door assembly 1 is in the door-open state. At this time, the tension spring 609 is in a tension state, and maintains a rightward tension. After the fixed door hook 4 enters the door closing assembly 6, the second fixed door hook driving surface 401b passes over the latch arm 612i, i.e., enters the movable chassis triggering position. As a result, the first fixed door hook driving surface 401a contacts the driving arm 612j, and the driving arm 612j is pressed into the movable housing 612.

As shown in fig. 9, the fixed door hook 4 continues to travel to the right, and the first fixed door hook drive surface 401a contacts the drive arm 612j, gradually pressing the drive arm 612j into the movable housing as shown in progress. Thus, the fixed hook end 401 is engaged with the movable housing 612, and the fixed hook 4 moves to the right together with the movable housing 612 by the tension spring 609. While the driving arm 612j is pressed into the interior of the movable housing 612, the locking arm 612i will synchronously extend out of the exterior of the movable housing 612 according to the lever principle. Meanwhile, the self-locking arm 612c retracts into the movable case 612, and the self-locking state is released.

As shown in FIG. 10, with the fixed door hook 4 continuing to travel to the right, the movable housing 612 will disengage the interlocking support self-locking arm detent 601g. Because the interlock supports the stop action of self-locking arm guide 601f, self-locking arm 612c cannot extend out of movable housing 612, thereby ensuring that drive arm 612j remains retracted within movable housing 612 and locking arm 612i remains extended. At this point, movable housing 612 is subjected to only one rightward pulling force provided by tension spring 609. That is, at this time, the user does not need to apply a pushing force to the door body assembly 1, and the door body assembly 1 can automatically move to the closing direction, that is, to the right direction, by the pulling force of the tension spring 609. By the movement of the mechanism inside the movable housing 612, the latch arm 612i extends to contact the third fixed door hook driving surface 401 c. Meanwhile, the damper detent 612p on the movable housing 612 contacts the end of the damper 610, and the damper 610 will continuously provide an opposite force during the subsequent door closing process, so as to control the return speed of the tension spring 609.

As shown in fig. 11, the fixed door hook 4 continues to travel to the right and the first movable door hook ramp 204a begins to contact the first interlocking support movable door hook ramp 601d. The door body assembly 1 continues to move rightwards, the movable door hook 2 moves rightwards and moves upwards and downwards along the first movable door hook guide rail 201 and the second movable door hook guide rail 203, when the movable door hook 2 moves upwards and downwards, the door hook tension spring 3 is stretched and can always provide a downward tensile force, and the first movable door hook inclined surface 204a of the movable door hook 2 is tightly attached to the first interlocking supporting movable door hook inclined surface 601d.

As shown in fig. 12, the fixed door hook 4 continues to travel to the right, starting to trigger the gear system. That is, the fourth stationary hook drive surface 401d will contact the drive rack end surface 608d during continued door closing and will cause the driven rack 604 to move to the left during the latter process by engagement of the drive rack 608 with the pinion 605 and engagement of the pinion 605 with the driven rack 604. At the same time, the rack tension spring 603 is stretched, which will provide a force that is diametrically opposite the direction of travel of the driven rack 604. The driving rack 608 moves rightward along the second interlock support upper cover rail 611b and the second interlock support block rail 601b, and the driven rack 604 moves leftward along the first interlock support upper cover rail 611a and the first interlock support block rail 601 a.

As shown in fig. 13, the fixed door hook 4 continues to move rightward until the door body assembly 1 is completely closed. The first movable door hook ramp 204a moves beyond the right end of the first interlock support movable door hook ramp 601d and the second movable door hook ramp 204b will contact the second interlock support movable door hook ramp 601e. Under the influence of the continued downward force of the hook tension spring 3, the moving hook 2 will be stuck in the current position, i.e. it will be able to keep the second moving hook ramp 204b in contact with the second interlock supporting moving hook ramp 601e. Also, the first movable door hook slope 204a starts to press to the first micro switch contact 602a, thereby turning on the first control circuit in the cooking appliance, and the control unit of the cooking appliance can receive a signal that the first control circuit is turned on. At this time, the driven rack end surface 604d presses the second microswitch contact 606a, whereby the second control circuit in the cooking appliance is turned on, and the control unit of the cooking appliance can receive a signal that the second control circuit is turned on. And, the driven rack slope 604a pushes against the third micro switch contact 607a, thereby turning on the third control circuit in the cooking appliance, and the control unit of the cooking appliance can receive a signal that the third control circuit is turned on. The damper 610 is run to a stop position but there is still a safety margin. The moveable chassis 612 moves along the third bearing block rail 601c and the third bearing upper cover rail 611c to a final position. At this time, the door hook tension spring 3 is stretched to always provide a downward tension, and the tension spring 609 simultaneously acts on the downward tension, so that the door body assembly 1 can be kept in a door closing state.

As shown in fig. 14, when the door body assembly 1 starts to be opened, that is, when the user starts to pull the door body assembly 1 to the left, the fixed door hook 4 starts to move to the left. At this time, since the movable chassis 612 has not moved to the interlock support self-locking arm locking portion 601g, the self-locking arm 612c cannot be extended out of the movable chassis 612 due to the interlock support self-locking arm rail 601f, and the tension spring 609 is extended in a state where the driving arm 612j cannot be extended out of the movable chassis 612 and the locking arm 612i remains extended out of the movable chassis 612. The user pulls the door body assembly against the tension spring 609 so that the damper 610 is restored to the original state by its self-resetting function, i.e., the tip of the damper 610 is ejected while the pressure at the damper catching portion 612p is removed. The force applied to the driving rack end surface 608d is removed, and the driven rack 604 is returned to the initial state by the rack tension spring 603. The movable door hook 2 is retracted to an initial position relative to the fixed door hook 4 under the influence of the continued downward force of the door hook extension spring 3. In addition, the first microswitch 602, the second microswitch 606 and the third microswitch 607 are powered off at the same time, so that the safety of opening the door is ensured.

As shown in FIG. 15, with the fixed door hook 4 continuing to move to the left, the movable chassis 612 travels to the interlocking support self-locking arm detent 601g, and the self-locking arm 612c is free from the interlocking support self-locking arm rail 601f, so that the movable chassis 612 can be extended normally. Thus, the driving arm 612j is extended out of the movable housing 612 by the housing pressure spring 612e, and the latch arm 612i is simultaneously retracted into the movable housing 612. At this point, the moveable chassis 612 is snapped into the interlock support self-locking arm detent 601g.

As shown in fig. 16, the fixed door hook 4 continues to move to the left and the second fixed door hook drive surface 401b slides out of the door closer assembly over the latch arm 612 i.

As shown in fig. 17, the fixed door hook 4 continues to move to the left completely clear of the door closer assembly 6. The current position is the door opening state and the initial state, and the next door closing and opening operation cycle can be waited.

It is worth making clear that the cooking utensil mentioned in the technical solution of the present invention should include, but not limited to, microwave oven, microwave oven air fryer combination oven, steam oven, microwave air fryer steam and other multi-combination ovens, and is especially suitable for cooking utensils that open door left and right, i.e. horizontal open door.

In conclusion, according to the automatic door closing mechanism of the utility model, the automatic door closing effect of the door body assembly can be realized only by giving a very small initial kinetic energy to the door body assembly 1; meanwhile, the door can be slowly closed, and the noise generated when the door is closed is greatly reduced; and compact structure and stable operation are realized; and the utility model discloses an automatic door closing mechanism has high commonality, and its structure is easily processed to reduction in production cost.

So far, some specific embodiments of the present invention have been described in detail by way of examples, but it should be understood by those skilled in the art that the above examples are only for illustration and are not intended to limit the scope of the present invention. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope or spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (10)

1. An automatic door closing mechanism, comprising:

a door body assembly (1);

the fixed door hook (4) is fixedly arranged on the door body assembly (1) and is provided with a fixed door hook end part (401) extending outwards; and

a door closing assembly (6) comprising:

-an interlock support base (601), on which interlock support base (601) an interlock support self-locking arm rail (601 f) extending in the horizontal direction is provided, and on the outer side end of the interlock support self-locking arm rail (601 f) an interlock support self-locking arm detent portion (601 g),

-an interlock bearing upper cover (611) that can be coupled to said interlock bearing (601),

-a movable chassis (612) arranged between said interlock bearing (601) and said interlock bearing upper cover (611), said movable chassis (612) being movable in a horizontal direction with respect to said interlock bearing (601) and said interlock bearing upper cover (611);

-a tension spring (609) arranged between said interlock bearing (601) and said interlock bearing upper cover (611), said tension spring (609) being fixedly mounted on said interlock bearing (601) at one end and fixedly connected to said movable box (612) at the other end;

wherein, under the door-open state, the movable chassis (612) is stopped by the interlocking support self-locking arm clamping part (601 g); during the door closing process, the end part (401) of the fixed door hook can be combined with the movable case (612), and the fixed door hook (4) moves to the door closing direction along with the movable case (612) under the action of the tension spring (609).

2. The automatic door closing mechanism of claim 1, wherein the movable chassis (612) comprises:

a locking rocker (612 h) and a self-locking rocker (612 d) which are rotatably arranged in the shell of the movable chassis (612);

the driving arm (612 j) can move in the up-down direction, and the driving arm (612 j) is movably connected with one end of the locking rocker (612 h) and one end of the self-locking rocker (612 d);

the self-locking arm (612 c) can move up and down, and the self-locking arm (612 c) is movably connected with the other end of the self-locking rocker (612 d);

the locking arm (612 i) can move in the up-down direction, and the locking arm (612 i) is movably connected with the other end of the locking rocker (612 h); and

one end of the case pressure spring (612 e) is fixedly connected with the lower end face of the driving arm (612 j), the other end of the case pressure spring (612 e) is in slidable abutting joint with the inner side wall face of the movable case (612),

the driving arm (612 j) is movably connected with one end of the locking rocker (612 h) and one end of the self-locking rocker (612 d) through a first rotating shaft (612 a); the self-locking arm (612 c) is movably connected with the self-locking rocker (612 d) through a second rotating shaft (612 b); the locking arm (612 i) is movably connected with the locking rocker (612 h) through a third rotating shaft (612 g).

3. The automatic door closing mechanism according to claim 2, wherein the housing of the movable chassis (612) is composed of a lower chassis case (612 f) and an upper chassis case (612 k) joinable with each other; a positioning hole aligned with the driving arm (612 j) is formed in the top wall surface of the upper case shell (612 k), and the driving arm (612 j) can move upwards to pass through the positioning hole aligned with the driving arm (612 j); a positioning hole aligned with the self-locking arm (612 c) is formed in the bottom wall surface of the lower case shell (612 f), and the self-locking arm (612 c) can move downwards to pass through the positioning hole aligned with the self-locking arm (612 c); the top wall surface of the case upper shell (612 k) is provided with a positioning hole aligned with the locking arm (612 i), and the locking arm (612 i) can move upwards to pass through the positioning hole aligned with the locking arm (612 i).

4. The automatic door closing mechanism according to claim 3, wherein the fixed door hook end (401) comprises:

a first fixed door hook drive surface (401 a), the first fixed door hook drive surface (401 a) being disposed at an oblique angle;

a second fixed door hook driving surface (401 b), the second fixed door hook driving surface (401 b) being provided on a bottom edge side of the fixed door hook end portion (401);

a third fixed door hook driving surface (401 c), the third fixed door hook driving surface (401 c) being provided on an inner edge side of the fixed door hook end portion (401);

a fourth fixed door hook driving surface (401 d), the fourth fixed door hook driving surface (401 d) being provided on an outer edge side of the fixed door hook end portion (401),

wherein the first fixed door hook drive surface (401 a) is arranged between the second fixed door hook drive surface (401 b) and the fourth fixed door hook drive surface (401 d).

5. The automatic door closing mechanism according to claim 4, wherein the door closing assembly (6) further comprises a damper (610), the movable case (612) further comprising a damper capture portion (612 p); the damper catching portion (612 p) is contactable with a movable end of the damper (610) as the movable chassis (612) moves.

6. The automatic door closing mechanism according to claim 5, further comprising a movable door hook (2) and a door hook tension spring (3), the movable door hook (2) being slidably mounted in the fixed door hook (4); one end of the door hook tension spring (3) is connected with the movable door hook (2), and the other end of the door hook tension spring (3) is connected with the door body assembly (1).

7. The automatic door closing mechanism according to claim 6, wherein the movable door hook (2) comprises an outwardly protruding movable door hook end portion (204), the movable door hook end portion (204) being formed as a bent hook portion and having a first movable door hook slope (204 a) towards an outer edge side and a second movable door hook slope (204 b) towards an inner side; the interlocking support base (601) is further provided with a first interlocking support movable door hook ramp (601 d) extending along the inclined upward direction and a second interlocking support movable door hook ramp (601 e) continuing to the first interlocking support movable door hook ramp (601 d) and extending along the inclined downward direction; during the closing of the door, the first movable door hook ramp (204 a) is in contact with the first interlock support movable door hook ramp (601 d), or the second movable door hook ramp (204 b) is in contact with the second interlock support movable door hook ramp (601 e).

8. The automatic door closing mechanism according to claim 7, wherein the door closing assembly (6) further comprises, between the interlock support base (601) and the interlock support upper cover (611):

a drive rack (608), said drive rack (608) being movable in a horizontal direction, said fourth fixed door hook drive surface (401 d) of said fixed door hook end (401) being capable of contacting said drive rack (608) during door closing;

a gear (605), wherein the driving rack (608) is in meshed transmission with the gear (605);

a driven rack (604), wherein the driven rack (604) can move along the horizontal direction, and the gear (605) is in meshed transmission with the driven rack (604);

and one end of the rack tension spring (603) is fixed on the interlocking supporting seat (601), and the other end of the rack tension spring (603) is fixedly connected with the driven rack (604).

9. The automatic door closing mechanism according to claim 8, wherein the door closing assembly (6) further comprises: a first microswitch (602), a second microswitch (606) and a third microswitch (607); when the door body assembly (1) is in a fully closed position, the first microswitch (602) is triggered by the first movable door hook inclined plane (204 a), and the second microswitch (606) and the third microswitch (607) are triggered by the driven rack (604).

10. A cooking appliance having an automatic door closing mechanism as claimed in any one of claims 1 to 9.

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