CN117287107A - Door opening and closing structure for oven and oven comprising same - Google Patents

Abstract

The utility model provides a door opening and closing structure for a sliding door type oven, which comprises a door body, a rotating structure and a limiting structure, wherein the rotating structure comprises a hinged hook, a rotating base and a rotating shaft, the hinged hook is arranged on the lower edge of the door body and is rotatably connected with the rotating base through the rotating shaft, a plurality of limiting grooves are formed in the side wall of the hinged hook, the limiting structure is arranged on the side wall of the hinged hook and comprises a limiting needle, a reset spring and a limiting needle sleeve, the limiting needle and the reset spring are accommodated in the limiting needle sleeve, and the end part of the limiting needle is pushed to be in contact with the side wall of the hinged hook under the action of the restoring force of the spring. The hinged hook can rotate relative to the rotating base under the driving of the door body, so that the end part of the limiting needle can slide along the side wall of the hinged hook, and when the end part of the limiting needle slides into the limiting groove, the door body cannot continue to rotate.

Description

Door opening and closing structure for oven and oven comprising same

Technical Field

The utility model relates to the field of ovens for kitchen appliances, in particular to a door opening and closing structure for an oven and an oven comprising the same.

Background

An oven is an electric appliance for baking food or drying food, which is a food cooking appliance commonly used in daily life of people, and which utilizes radiant heat emitted from an electric heating element to bake food. In recent years, an "air oven" has also emerged which is used to cook foods by circulating a stream of hot air, and which is commonly used to process pasta, such as bread, pizza, or snack foods such as egg tarts, biscuits and the like.

However, with the continuous improvement of living standard, consumers put more demands on the cooking effect of the oven, and the external dimension of the oven is also an important consideration for the consumers to purchase kitchen appliances due to the limited kitchen operation space. In order to save the operation space, the door body of the conventional oven is usually opened in a side-open or pull-down structure. The side-opening structure is relatively simple, but cannot stay at a specific angle in the opening process, and the too long force arm can cause larger shaking. The pull-down structure can stay at a pre-opening angle of about 15 degrees and a full-opening angle of about 90-110 degrees, but the rest opening angles cannot stay due to the action of the restoring force of the spring, and the door body is easy to damage due to impact during rebound.

In view of the above, patent 202122062684.6 discloses a full-automatic damping hinge for oven door, which comprises a hinge frame installed inside an oven body, a door body hinged inside the hinge frame through a shaft rod and capable of sealing the oven body, a transmission structure arranged inside the oven body, and a main transmission shaft movably connected with the damping buffer structure inside the oven body, wherein the transmission structure is meshed with the shaft rod through a damping buffer structure. Although this hinge can realize the slow opening of door body, still have the not enough: firstly, a limiting mechanism is not arranged on a hinge of a door body assembly, and the door body cannot stay at a certain opening angle; secondly, the hinge framework adopted by the utility model is too complex to match with the opening and closing mechanism of the transmission structure, so that very high production cost is inevitably brought, the durability under the long-term use condition is difficult to ensure, and the increased production cost is finally transferred to a consumer in a form of increasing the price or compressing the cost in other aspects, thereby influencing the consumer experience.

Therefore, a door body opening and closing structure with reasonable design is needed to be provided for the oven, the residence of the oven door under a plurality of opening angles can be realized without using a metal hinge, and meanwhile, the simple structure and the low manufacturing cost are also considered.

Disclosure of Invention

In order to solve the above problems, the present utility model provides a door opening and closing structure for an oven, comprising:

a door body;

the rotating structure comprises a hinged hook, a rotating base and a rotating shaft, wherein the hinged hook is arranged on the lower edge of the door body and is rotatably connected with the rotating base through the rotating shaft, and a plurality of limiting grooves are formed in the side wall of the hinged hook;

the limiting structure is arranged on the side wall of the hinged hook and comprises a limiting needle, a reset spring and a limiting needle sleeve, wherein the limiting needle and the reset spring are accommodated in the limiting needle sleeve, the reset spring pushes the end part of the limiting needle to be in contact with the side wall of the hinged hook under the action of the restoring force of the spring,

the hinged hook can rotate relative to the rotating base under the drive of the door body, so that the end part of the limiting needle can slide along the side wall of the hinged hook, and when the end part of the limiting needle slides into the limiting groove, the door body cannot continue to rotate.

According to a preferred embodiment of the present utility model, the rotating structure is further provided with a torsion spring, wherein the torsion spring is torsionally deformed by the hinge hook to generate a restoring force for restoring the door body to the closed position when the hinge hook rotates with respect to the rotating base.

According to a preferred embodiment of the present utility model, the torsion spring includes a coil, a spring end and a spring arm, wherein the coil is sleeved outside the rotating shaft, the spring end is in contact with the rotating base, and the spring arm is in contact with the hinge hook, and when the door body is opened to the outside, the hinge hook is driven by the door body to rotate relative to the rotating base so as to make the coil torsionally deform, so as to generate a restoring force for restoring the door body to the closed position.

According to a preferred embodiment of the present utility model, the side wall of the hinged hook is further provided with a guiding groove, and the guiding groove borders the edge of the limiting groove, so that the end of the limiting needle can slide into the limiting groove along the guiding groove in the process of sliding along the side wall of the hinged hook.

According to a preferred embodiment of the utility model, the number of the rotating structures is two and is arranged in mirror image opposite to the lower edge of the door body, and the number of the limit structures matched with the rotating structures is also two and is arranged in mirror image opposite to the limit structures.

In a second aspect of the present utility model, there is provided an oven comprising the aforementioned door opening and closing structure, and further comprising an oven body having a cooking cavity provided therein and a cooking cavity opening provided at a front side.

According to a preferred embodiment of the present utility model, the oven further comprises a door inner frame, wherein the door inner frame is disposed at the cooking cavity opening, and when the door opening and closing structure is in a closed state, the door is attached to the door inner frame from the outside and completely covers the cooking cavity opening to close the cooking cavity.

According to a preferred embodiment of the present utility model, the toaster further includes a bottom housing connected to the toaster body from a lower side, and the rotating base is provided at a front edge of an upper side of the bottom housing such that the door rotates with respect to the toaster body when the hinge hooks rotate with respect to the rotating base.

According to a preferred embodiment of the present utility model, the limiting structure further includes a limiting needle sleeve cover disposed at a lower edge of the door body inner frame to fix the limiting needle sleeve, such that an end portion of the limiting needle can slide along the side wall of the hinge hook when the hinge hook rotates with respect to the rotating base.

According to a preferred embodiment of the utility model, the limit needle sleeve cover is connected with the inner frame of the door body through a screw connector.

The utility model provides at least the following technical effects:

1. the door body is driven to rotate through the rotating structure, interference of the limiting structure is matched, the function of downwards turning, opening and closing of the door body can be achieved without using a high-cost metal hinge connection mode, and manufacturing cost is effectively reduced.

2. Through set up spacing recess and guiding groove on articulated hook to cooperate with the spacing needle, ensure that the door body can also stop under a plurality of opening angles when realizing the pulldown and opening and closing function.

Additional features and advantages of the application will be set forth in the description which follows, or may be learned by practice of the application.

Drawings

The accompanying drawings are included to provide a further understanding of the technical aspects of the present application and are incorporated in and constitute a part of this specification, illustrate the technical aspects of the present application and together with the examples of the present application, but do not constitute a limitation of the technical aspects of the present application.

FIG. 1 is an exploded view of a door opening and closing structure according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a rotating structure and a limiting structure in a door opening and closing structure according to an embodiment of the present utility model;

FIG. 3 is a schematic perspective view of an opening and closing structure according to an embodiment of the present utility model;

FIG. 4 is an enlarged schematic view of area A of FIG. 3;

FIG. 5 is a side view of a door opening and closing structure according to an embodiment of the present utility model in a door open state;

FIG. 6 is an exploded view of an oven incorporating a door opening and closing structure according to an embodiment of the present utility model;

FIG. 7 is an exploded view of an oven at another angle with the door opening and closing structure of an embodiment of the present utility model;

fig. 8 is an assembly relationship diagram of a limit structure in a door opening and closing structure according to an embodiment of the present utility model.

Reference numerals illustrate:

1-door body 2-rotating structure 21-hinged hook

211-limit groove 212-guide groove 22-rotating base

221-tooth fixing hole 23-rotating shaft 231-rotating shaft tooth end

24-torsion spring 241-spring arm 242-spring end

243-coil 3-limit structure 31-limit needle

311-limit needle cap 32-reset spring 33-limit needle sleeve

34-limiting needle sleeve cover 4-oven body 41-cooking cavity

411 cooking chamber opening 42-heating tube cover 43-motor

44-heating fan 45-heating tube 5-door inner frame

6-bottom housing 7-door handle

Detailed Description

Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative, and is in no way intended to limit the utility model, its application, or uses. The present utility model 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 utility model to those skilled in the art.

The utility model provides a door opening and closing structure for an oven. Referring to fig. 1 and 2, fig. 1 is a schematic exploded view of a door body opening and closing structure according to an embodiment of the present utility model when the door body 1 is in a closed state, and fig. 2 is a schematic exploded view of a rotating structure 2 and a limiting structure 3 in the door body opening and closing structure.

The door body opening and closing structure for the oven mainly comprises a door body 1, a rotating structure 2 and a limiting structure 3. The door 1 is used as a covering structure for closing and opening a cooking cavity of the oven, and is in a shape of a plane rectangle. The rotating structure 2 is used as a connecting mechanism of the door body 1 and is hinged with the oven main body through the axial rotation and closing of the rotating structure 2 so as to form a closed cooking cavity for cooking food when being closed. In addition, the utility model also has a limit structure 3 which is matched with the rotary structure 2, and the door body 1 can stay at a plurality of preset opening angles through the interference of the limit structure 3 on the rotary structure 2 in the process of opening and closing the door body 1. It should be noted that, although the door opening and closing structure disclosed in the embodiment of the present utility model adopts the pull-down type opening structure, the door opening and closing structure for the oven disclosed in the present utility model should not be taken as a limitation of the present utility model, and is applicable not only to the pull-down type opening structure (i.e., the structure in which the door is turned down and opened), but also to the side-opening type opening structure (i.e., the structure in which the door is turned laterally).

Specifically, referring to fig. 2 with emphasis, the rotating structure 2, which is a connection structure with the function of opening and closing the door body 1, is mainly composed of a hinge hook 21, a rotating base 22, and a rotating shaft 23. The hinged hook 21 is generally provided with a hook-shaped appearance, is fixed on the lower edge of the door body 1 from below, is further provided with a through hole which is transversely penetrated for the rotating shaft 23 to pass through, and is further provided with a plurality of limit grooves 211 on the inner side wall of the hinged hook so as to be matched with the limit structure 3 to realize hovering of the door body 1 at a specific opening angle. The rotary base 22 has an upwardly open C-shaped structure (i.e., is formed by a bottom side wall, an outer side wall and an inner side wall), the outer side wall of which is provided with a tooth fixing hole 221 adapted to the tooth end 231 of the rotary shaft, and the inner side wall of which is also provided with a fixing hole rotatably connected to the other end of the rotary shaft where the tooth structure is not provided. The rotating shaft 23 is connected with the rotating base 22 and the hinged hook 21 in a rotating manner in an inserting and combining manner, so that the hinged hook 21 can axially overturn towards the outer side direction of the door body 1 and/or the inner side direction of the door body 1 relative to the rotating base 22, and in the rotating process, the user can obtain good damping experience in the process of rotating the oven door by means of interaction force between the rotating shaft tooth ends 231 arranged at the outermost ends of the rotating shaft 23 and the tooth fixing holes 221.

Further, the limiting structure 3 is provided as a limiting structure for the rotating structure 2, which is provided at the inner side wall of the hinge hook 21, and limits the sliding position of the hinge hook 21 by interfering with the hinge hook 21. The limit structure 3 is formed by combining a limit needle 31, a return spring 32 and a limit needle sleeve 33. The limiting needle 31 and the return spring 32 are accommodated in the limiting needle sleeve 33, and the end of the limiting needle 31 is pushed to abut against the side wall of the hinged hook 21 under the action of the spring restoring force of the return spring 32. Specifically, one end of the limiting needle 31 is provided with a limiting needle cap 311, and the other end of the limiting needle cap passes through the return spring 32 and is inserted into an opening provided in the side wall of the limiting column sleeve. The length of the return spring 32 is greater than the length of the stopper needle 31, so that the stopper needle cap 311 is pushed toward the inner side wall (i.e., the side wall provided with the stopper groove 211) of the hinge hook 21 by the restoring force of the return spring 32 spring. After the stopper needle 31 is fitted into the stopper needle sleeve 33, the return spring 32 is sandwiched inside the stopper needle sleeve 33. Preferably, in order to secure the strength of the spacing structure 3 and reduce the manufacturing cost, the spacing structure 3 is made of nylon material.

Preferably, fig. 3, fig. 4 and fig. 5 are combined, wherein fig. 3 is a schematic perspective view of a door body opening and closing structure according to an embodiment of the present utility model, fig. 4 is an enlarged schematic view of a region a in fig. 3, and fig. 5 is a side view of the door body opening and closing structure in a half-opened state of the door body from a side view. When the user needs to open the door body 1 outwards by a certain angle in the fully closed state of the door body 1 (i.e., when the included angle between the door body and the oven body is about 90 degrees), the user needs to turn the door body 1 outwards by an external force to open by a certain angle, and in this process of opening the door body 1, the hinged hook 21 rotates outwards relative to the rotating base 22 under the driving of the door body 1 (note that the rotating base 22 should be in a stationary state from beginning). Correspondingly, the end of the limiting pin 31 is closely attached to the inner side wall of the hinge hook 21 under the pushing of the return spring 32 while sliding along the inner side wall of the hinge hook 21 toward the opposite direction (i.e., the inner direction) of the moving direction of the hinge hook 21, and when the end of the limiting pin 31 (i.e., the limiting pin cap 311) slides into the limiting groove 211, the limiting pin cap 311 and the limiting groove 211 are in a state of being mutually inserted and combined, so that the door body 1 cannot continue to rotate outwards. When the limit pin cap 311 and the limit groove 211 are in the state of being mutually inserted and combined, even if the support of the external force is lost, the limit pin cap 311 cannot easily slide out of the limit groove 211, so that hovering under a preset angle in the opening process of the door body 1 is realized.

Preferably, when the user needs to close the door body 1 inward by a certain angle in a state that the door body 1 is completely opened (i.e., when the angle between the door body and the oven body is 0 degrees), the user needs to turn the door body 1 outward by an external force to open by a certain angle, and during this process of closing the door body 1, the hinge hook 21 rotates inward relative to the rotating base 22 under the driving of the door body 1 (note that the rotating base 22 should be in a stationary state from beginning). Correspondingly, the end of the limiting pin 31 is pushed by the return spring 32 to be closely attached to the inner side wall of the hinge hook 21 and simultaneously slide along the inner side wall of the hinge hook 21 in the opposite direction (i.e., the outer direction) of the movement direction of the hinge hook 21, and when the end of the limiting pin 31 (i.e., the limiting pin cap 311) slides into the limiting groove 211, the limiting pin cap 311 and the limiting groove 211 are in a mutually inserted and combined state, so that the door body 1 cannot continue to rotate inwards. When the limit pin cap 311 and the limit groove 211 are in the state of being mutually inserted and combined, even if the support of the external force is lost, the limit pin cap 311 cannot easily slide out of the limit groove 211, so that hovering under a preset angle in the closing process of the door body 1 is realized.

Further, referring to fig. 3, in order to prevent excessive resistance generated during the process of sliding the limit pin cap 311 into and out of the limit groove 211, a guide groove 212 is further provided on the side wall of the hinge hook 21, which has a slope-shaped recess structure, but the recess depth of the recess structure of the guide groove 212 is shallower than the recess depth of the recess structure of the limit groove 211, so as to prevent the limit pin 31 from being completely jammed in the guide groove 212. And, the edges of the concave region of the guide groove 212 and the edges of the concave region of the limit groove 211 are bordered each other, so that the concave structures of the guide groove 212 and the limit groove 211 are connected to each other. Therefore, during the process of opening or closing the door body 1, the end portion of the limiting needle 31 (i.e., the limiting needle cap 311) slides along the side wall of the hinge hook 21, and then slides into the groove of the guiding groove 212 with a shallower groove, and then slides into the limiting groove 211 gradually along the concave structure of the guiding groove 212. Preferably, the recess structure of the guide groove 212 further has a certain inclination, which enables the limit needle cap 311 to be slid into the limit groove 211 more smoothly.

Preferably, in order to further enhance the damping effect so that the user does not have a sloshing or unstable feedback experience during the process of opening and closing the door body 1, the present utility model is correspondingly provided with a plurality of rotating structures 2 to ensure that the door body 1 receives balance during the rotation relative to the oven body 4. Specifically, the number of the rotating structures 2 is two and arranged at the lower edge of the door body 1 in mirror image opposition, so that two limit grooves 211 and guide grooves 212 are respectively provided inside the two rotating structures 2, and each pair of limit grooves 211 and guide grooves 212 adopts a horizontally symmetrical layout with respect to each other (i.e., projections of each pair of limit grooves 211 in the horizontal direction thereof overlap each other, and projections of each pair of guide grooves 212 in the horizontal direction thereof also overlap each other). Correspondingly, the number of limit structures 3 adapted to the rotary structure 2 is also two and arranged in mirror-image opposition.

Preferably, in combination with fig. 1, 2 and 3, in order to make the door opening and closing structure of the present utility model realize buffer opening during the opening process, a torsion spring 24 is further added. As shown in fig. 2, the torsion spring 24 includes 2 coils 243, 2 spring ends 242, and 1 spring arm 241. The two coils 243 are respectively disposed at two ends of the torsion spring 24 and are connected together by the spring arm 241, and the spring ends 242 are disposed at the final ends of the two coils 243 and are adapted to the opening and closing structure, so as to jointly form the torsion spring 24. Specifically, the spring coil 243 is sleeved outside the rotating shaft 23, the spring end 242 abuts against the rotating base 22, and the spring arm 241 abuts against the hinge hook 21. In one embodiment, the damping direction of the torsion spring 24 is opposite to the rotation direction when the rotation shaft 23 is opened, so when the user opens the door body 1, a torsion force in the opposite direction is applied to the spring coil 243, at this time, the hinged hook 21 is driven by the door body 1 to rotate relative to the rotation base 22 so that the spring coil 243 is torsionally deformed, and the spring coil 243 automatically generates a spring restoring force opposite to the rotation direction when torsionally deformed, and the direction of the spring restoring force is exactly opposite to the opening direction of the door body 1, thereby counteracting the additional falling pulling force generated by the weight of the door body 1 during the opening process of the door body 1, and realizing the damping opening effect of the door body 1. In the preferred embodiment, in order to ensure effective buffering of the opening of the door body 1, the number of torsion springs 24 is two, and the number of rotation shafts 23 corresponding to the torsion springs 24 is also two. As shown in fig. 1, two torsion springs 24 are disposed at positions near both ends of the lower edge of the door body 1, and when the door body is assembled in the open-close structure, each torsion spring 24 corresponds to one rotation shaft 23.

In a second aspect of the utility model, an oven is provided, comprising a door opening and closing structure for an oven as described above.

In connection with fig. 6, 7, and 8, fig. 6 shows an exploded view of an oven to which the door opening and closing structure is applied, fig. 7 shows an exploded view of an oven including the door opening and closing structure, and fig. 8 shows an assembled relationship of a limit structure in the door opening and closing structure.

Specifically, in order to adapt the door opening and closing structure in the foregoing embodiments, the oven of the present utility model further includes an oven body 4 having a substantially cubic structure, in which a cooking cavity 41 is provided, and a cooking cavity opening 411 is provided at a front side of the cooking cavity 41. Wherein the cooking cavity 41 is preferably in the shape of a box with an opening at the front side as a receiving space for receiving food to be cooked, and the opening is defined as a cooking cavity opening 411 for taking and placing food to be cooked.

Further, in order to realize the movable connection between the door body 1 and the oven body 4 through the opening and closing structure, the oven of the embodiment of the utility model is further provided with a door inner frame 5, a bottom shell 6, a door handle 7 and a limit pin sleeve cover 34. The door inner frame 5 is disposed at the cooking cavity opening 41 and has a substantially square shape, and the outer surface structure is disposed substantially corresponding to the inner surface structure of the door 1, so that when the door 1 is in a closed state, the door 1 is attached to the door inner frame 5 from the outer side and completely covers the cooking cavity opening 411 to achieve the relative sealing of the cooking cavity 41. The bottom case 6 is connected to the toaster body 4 from a lower side, and a rotating base 22 is provided at a front edge of an upper side of the bottom case 6. The door handle 7 is provided on the other outer surface of the door body 1 opposite to the cooking cavity opening 411 side, see fig. 7, and it can be seen that the outer side wall of the door body 1 is provided with two screw hole sites, so that the door handle 7 can be connected with the door body 1 in a screw connection manner, thereby ensuring the durability of the door handle under long-term use conditions.

Preferably, referring to fig. 8, a schematic diagram of an assembly relationship of the limit structure 3 and the rotating base 22 relative to the inner frame of the door body in the door body opening and closing structure according to the embodiment of the present utility model is shown. The bottom side of the rotating base 22 is provided with a screw fixing hole, the center part of the rotating base 22 is provided with an opening, after the screw fixing hole of the rotating base 22 is aligned with the fixing structure used for fixing the rotating base 22 at the front edge of the upper side of the bottom shell 6, the screw fixing hole is combined in a threaded connection mode, and the opening at the center part of the rotating base 22 can be matched with a corresponding protruding structure on the limiting needle sleeve cover 34 to further strengthen firm bearing after the combination of all parts, so that when the hinged hook 21 rotates relative to the rotating base 22, the door body 1 rotates relative to the oven body 4 without driving the rotating base 22 and the limiting structure 3 to rotate together. Correspondingly, the limiting structure 3 further comprises a limiting needle sleeve cover 34, and the limiting needle sleeve cover 34 is arranged at the lower edge of the door inner frame 5 to fix the limiting needle sleeve 33, so that when the hinged hook 21 rotates relative to the rotating base 22, the end part of the limiting needle 31 can slide along the side wall of the hinged hook 21.

Preferably, the oven with the door opening and closing structure provided by the embodiment of the utility model not only has a radiation heating mode, but also has an air heating function. Referring to fig. 7, a heating tube cover 42, a motor 43, a heating fan 44, and a heating tube 45 are provided inside the oven. Wherein the motor 43 is disposed inside the oven body 4, a heating fan 44 driven to rotate by the motor 43 to generate a circulating air flow, a heating tube 45 disposed under the heating fan 44 to heat the circulating air flow, and a cooking cavity 41 to receive and cook food materials. When the toaster is assembled, the motor 43 is coupled to the motor shaft and is capable of driving the motor shaft to rotate. The heating fan 44 is connected to the motor shaft below the heat pipe cover 42, so that the motor 43 can rotate the heating fan 44 by the rotation of the motor shaft. The heating tube cover 42 is disposed above the cooking cavity 41 in a fastening manner, the heating tube 45 is fixedly connected with the heating tube cover 42 from below the heating tube cover 42, and the heating tube 45 is disposed below the heating fan 44, such that the heating fan 44 is disposed between the heating tube cover 42 and the heating tube 45. During cooking, the heating fan 44 accelerates and blows air flow downward toward the heating pipe 45 by rotating, and the air flow flows toward the cooking cavity 41 after being heated by the heating pipe 45.

Preferably, the oven further comprises a cooling fan to achieve heat dissipation to the motor 43, thereby guaranteeing the service life of the oven. Correspondingly, a cooling fan and a motor cover for radiating heat of the motor 43 are additionally arranged in the oven. When assembled, the motor cover is buckled on the upper side of the heating tube cover 42, and the motor cover and the heating tube cover are connected with each other in a threaded connection mode. The cooling fan is accommodated in a space formed by the lower surface of the motor housing and the upper surface of the heat pipe housing 42, and the heating fan 44 is accommodated between the lower surface of the heat pipe housing 42 and the heat pipe 45, so that a temperature difference can be generated between the space where the cooling fan is located and the space where the heating fan 44 is located under the isolation of the heat pipe housing 42. Preferably, the heating fan 44 and the cooling fan are coaxial blades and jointly rotate under the drive of the motor 43. In one aspect, the motor shaft is connected to a cooling fan above the heat pipe cover 42 to create a low temperature circulating air flow to cool the motor 43; on the other hand, the motor shaft also passes through the motor housing and the heat pipe housing 42, respectively, and is connected to the heating fan 44 below the heat pipe housing 42 to drive the heating fan 44 to accelerate the air flow and blow down toward the heat pipe 45. Based on this structure, the fan blade structure of the cooling fan is opposite to the fan blade structure of the heating fan 44, so that in the mode of driving the single motor 43, hot air required by cooking in the oven can be manufactured, cold air for radiating the motor 43 can be manufactured, and the two are not affected by each other due to the fact that the wind-making directions are quite opposite, so that the production cost is reduced, the layout in the oven is optimized, and the cooking efficiency of the oven is not sacrificed while the occupied space of internal elements is saved.

Therefore, the door body opening and closing structure for the oven drives the door body 1 to rotate through the rotating structure 2, and can realize the functions of downwards turning, opening and closing the door body 1 by matching with the interference of the limiting structure 3 without using a high-cost metal hinge connection mode, so that the manufacturing cost is effectively reduced.

The door body opening and closing structure for the oven ensures that the door body 1 can stay at a plurality of opening angles while realizing the functions of pulling down to open and close by arranging the limiting groove 211 and the guide groove 212 on the hinged hook 21 and matching with the limiting needle 3.

So far, some specific embodiments of the utility model have been described in detail by way of example, it will be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be understood by those skilled in the art that the foregoing embodiments may be modified and equivalents substituted for elements thereof without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims (10)

1. A door opening and closing structure for an oven, comprising:

a door body (1);

the rotating structure (2) comprises a hinged hook (21), a rotating base (22) and a rotating shaft (23), wherein the hinged hook (21) is arranged on the lower edge of the door body (1) and is rotatably connected with the rotating base (22) through the rotating shaft (23), and a plurality of limiting grooves (211) are formed in the side wall of the hinged hook (21);

the limiting structure (3) is arranged on the side wall of the hinged hook (21) and comprises a limiting needle (31), a return spring (32) and a limiting needle sleeve (33), the limiting needle (31) and the return spring (32) are accommodated in the limiting needle sleeve (33), the return spring (32) pushes the end part of the limiting needle (31) to be in contact with the side wall of the hinged hook (21) under the action of the spring restoring force,

the hinged hook (21) can rotate relative to the rotating base (22) under the drive of the door body (1), so that the end part of the limiting needle (31) can slide along the side wall of the hinged hook (21), and when the end part of the limiting needle (31) slides into the limiting groove (211), the door body (1) cannot continue to rotate.

2. The door opening and closing structure according to claim 1, characterized in that the rotating structure (2) is further provided with a torsion spring (24), wherein when the hinged hook (21) rotates relative to the rotating base (22), the torsion spring (24) is torsionally deformed under the driving of the hinged hook (21) to generate a restoring force for restoring the door (1) to the closed position.

3. The door opening and closing structure according to claim 2, wherein the torsion spring (24) comprises a spring coil (243), a spring end (242) and a spring arm (241), wherein the spring coil (243) is sleeved outside the rotating shaft (23), the spring end (242) is abutted against the rotating base (22), the spring arm (241) is abutted against the hinged hook (21), and when the door body (1) is opened to the outside, the hinged hook (21) is driven by the door body (1) to rotate relative to the rotating base (22) so that the spring coil (243) is torsionally deformed, so as to generate a restoring force for restoring the door body (1) to the closed position.

4. A door opening and closing structure according to claim 3, wherein the side wall of the hinge hook (21) is further provided with a guiding groove (212), and the guiding groove (212) borders the edge of the limit groove (211), so that the end of the limit needle (31) can slide into the limit groove (211) along the guiding groove (212) in the sliding process of the end of the limit needle (31) along the side wall of the hinge hook (21).

5. The door opening and closing structure according to claim 4, characterized in that the number of the rotating structures (2) is two and is arranged in mirror-image opposition to the lower edge of the door body (1), and the number of the limit structures (3) adapted to the rotating structures (2) is also two and is arranged in mirror-image opposition to the same.

6. Oven, characterized in that it comprises a door opening and closing structure according to any of the previous claims 1 to 5, and further comprises an oven body (4), said oven body (4) being internally provided with a cooking cavity (41) and provided with a cooking cavity opening (411) at the front side.

7. The oven according to claim 6, characterized in that it further comprises a door inner frame (5), said door inner frame (5) being arranged at said cooking cavity opening (41), said door (1) being engaged by the outside with said door inner frame (5) and covering said cooking cavity opening (411) completely to close said cooking cavity (41) when said door opening and closing structure is in a closed state.

8. The oven according to claim 7, characterized in that it further comprises a bottom shell (6), said bottom shell (6) being connected from the underside to said oven body (4), and said swivel base (22) being provided at the upper front edge of said bottom shell (6), such that when said articulated hooks (21) swivel with respect to said swivel base (22), said door (1) rotates with respect to said oven body (4).

9. The oven according to claim 8, characterized in that the limit structure (3) further comprises a limit pin sleeve cover (34), the limit pin sleeve cover (34) being provided at the lower edge of the door inner frame (5) to fix the limit pin sleeve (33) such that the end of the limit pin (31) can slide along the hinge hook (21) side wall when the hinge hook (21) rotates relative to the rotating base (22).

10. Oven according to claim 9, characterized in that the limit pin sleeve cover (34) is connected to the door inner frame (5) with a screw connection.