Electric oven door hinge

Abstract

A hinge of an electric oven door comprises a fixed frame connected to a door body, two side walls of the fixed frame enclosing a movable cavity, a driving arm movably installed in the movable cavity, a connecting rod buckled to an oven body, the connecting rod being hingedly installed at a bottom of the fixed frame, a first guide slot being arranged above the side wall of the movable cavity, an upper end of the driving arm being slidably installed in the first guide slot through a first hinge rod, a lower end of the driving arm being hingedly connected to the connecting rod, a first spring being further installed in the movable cavity, one end of the first spring being connected to the first hinge rod, the other end of the first spring being connected to the fixed frame, the first spring pulling the driving arm to slide along the first guide slot, thereby pulling the connecting rod to swing relative to the fixed frame, a door closing reset force being generated, a locking structure being further arranged at a lower end of the fixed frame, the locking structure being buckled with a self-locking slot of the connecting rod when the hinge is closed, a door closing locking force being generated.

Description

Technical Field

[0001] This utility model relates to the field of hinge technology for household appliance cabinets, specifically an electric oven door hinge. Background Technology

[0002] Electric ovens, as common household appliances, consist of a baking chamber and a door that seals it. The door's sealing performance and opening / closing stability directly affect cooking results and baking efficiency. Most oven doors use a spring inside the hinge to provide the closing force, but existing hinges often struggle to achieve an ideal balance. If the hinge's closing force is set too high, the door will close too quickly, generating a large impact force. This can shorten the lifespan of both the hinge and the door, and may also produce excessive noise during use, affecting the user experience. Furthermore, an excessively fast closing speed can cause the door to spring back due to inertia upon contact with the oven body, reducing its sealing effectiveness.

[0003] If the closing force of the door hinge is set too low, the door may not close tightly and may loosen easily when subjected to slight external force, leaving a gap after the door is closed and causing heat leakage. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide an electric oven door hinge that is simple in structure, low in manufacturing cost, provides stable and controllable closing and resetting force, ensures that the door is firmly locked, improves sealing performance and baking efficiency, and effectively extends service life.

[0005] The purpose of this utility model is achieved by the following method: an electric oven door hinge, including a fixed frame connected to the door body, the two side walls of the fixed frame forming a movable cavity, and a drive arm movably installed in the movable cavity; it also includes a connecting rod fastened to the oven body, which is hinged to the bottom of the fixed frame; a first guide groove is provided above the side wall of the movable cavity, the upper end of the drive arm is slidably installed in the first guide groove through a first hinge rod, and the lower part of the drive arm is hinged to the connecting rod; a first spring is also installed in the movable cavity, one end of the first spring is connected to the first hinge rod, and the other end of the first spring is connected to the fixed frame, the first spring pulls the drive arm to slide along the first guide groove, thereby pulling the connecting rod to swing relative to the fixed frame, generating a closing and restoring force; it also includes a locking structure provided at the lower end of the fixed frame, the locking structure engaging with the self-locking groove of the connecting rod when the door hinge is closed, generating a closing and locking force.

[0006] One end of the first spring is connected to a lower spring rod, and the first hinge rod is inserted into the lower spring rod; the other end of the first spring is connected to an upper spring rod, and the connecting post passes through the fixed frame and is connected to the upper spring rod in sequence. The first spring generates tension, which always pulls the drive arm to move away from the connecting rod.

[0007] The locking structure includes a push rod and a second spring sleeved on the outer periphery of the push rod. A spring seat is provided in the movable cavity, and one end of the push rod is movably installed in the spring seat. It also includes a cam and a rotating shaft inserted in the cam. The lower end of the push rod is recessed to form a rotating groove. The cam is rotatably installed in the rotating groove through the rotating shaft. The second spring generates thrust to push the push rod to the end of the connecting rod. The cam is slidably locked in the self-locking groove of the connecting rod.

[0008] The lower end of the fixed frame is provided with a second guide groove, the two ends of the rotating shaft protrude out of the rotating groove and extend into the second guide groove, and the push rod slides along the second guide groove.

[0009] The inner wall of the active cavity is provided with a limiting plate. Correspondingly, the two sides of the drive arm are recessed with limiting grooves. The limiting plate is placed in the limiting groove to limit the displacement stroke of the drive arm.

[0010] The beneficial effects of this utility model are: 1. Simple structure, low manufacturing cost, and improved market competitiveness.

[0011] 2. The first spring works in conjunction with the drive arm to generate a closing and restoring force on the door, achieving a smooth and controllable closing process. This optimizes the door structure, prevents impact and rebound between the door and the housing, and effectively extends the service life of both the door and the housing.

[0012] 3. The locking structure provides a reliable closing force for the door, significantly improving the door's sealing performance and increasing the oven's baking efficiency.

[0013] 4. A first guide groove is set to guide the drive arm, and a second guide groove is set to guide the push rod, which enhances the stability and guidance of the drive arm and the locking structure, and ensures that the door hinge moves accurately within the preset range. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the hinge in the open position of the door in this utility model.

[0015] Figure 2 This is a cross-sectional view of the internal structure of the door hinge in the open state of this utility model.

[0016] Figure 3 This is a schematic diagram of the door hinge in the closed state of this utility model.

[0017] Figure 4 This is a cross-sectional view of the internal structure of the door hinge in the closed state of this utility model.

[0018] Figure 5 This is an exploded view of the door hinge structure of this utility model.

[0019] Figure 6 This is an exploded view of the door hinge structure of this utility model.

[0020] Figure 7 This is a schematic diagram of the structure of the fixed frame in this utility model.

[0021] Figure 8 This is a schematic diagram of the locking structure in this utility model. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings. An electric oven door hinge includes a fixed frame 1 connected to the door body, the two side walls of the fixed frame 1 forming a movable cavity 11, and a drive arm 2 movably installed in the movable cavity 11; it also includes a connecting rod 3 fastened to the oven body, which is hinged to the bottom of the fixed frame 1; a first guide groove 12 is provided above the side wall of the movable cavity 11, the upper end of the drive arm 2 is slidably installed in the first guide groove 12 via a first hinge rod 4, and the lower end of the drive arm 2 is hinged to the connecting rod 3; a first spring 5 is also installed in the movable cavity 11, one end of the first spring 5 is connected to the first hinge rod 4, and the other end of the first spring 5 is connected to the fixed frame 1. The first spring 5 pulls the drive arm 2 to slide along the first guide groove 12, thereby pulling the connecting rod 3 to swing relative to the fixed frame 1, generating a closing and restoring force; it also includes a locking structure 6 provided at the lower end of the fixed frame 1, the locking structure 6 engaging with the self-locking groove 31 of the connecting rod 3 when the door hinge is closed, generating a closing and locking force.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown: A fixed frame is connected to the door body, and a connecting rod is connected to the housing body. The connecting rod and the bottom of the fixed frame are hinged together. Movable cavities are formed by the two side walls of the fixed frame. A first guide groove is provided through the side wall of the movable cavity. A drive arm is movably installed in the movable cavity and connected to the upper end of the drive arm via a first hinge rod. The drive arm can slide along the first guide groove. Furthermore, a first spring is installed on the first hinge rod. One end of the first spring is connected to the hinge rod, and the other end is connected to the fixed frame. When the door body is closed, the drive arm slides smoothly and precisely along the first guide groove under the tension of the first spring, thereby pulling the pull rod to swing relative to the fixed frame, thus generating a closing and restoring force. This effectively avoids the sudden closing or impact caused by the direct action of the spring on the connecting rod in traditional door hinges, ensuring smooth and controllable door movement throughout the closing process. It avoids impact noise and component damage caused by excessive closing force, and also reduces the rebound phenomenon after the door body is closed, improving the sealing performance of the door body and the housing body.

[0024] Secondly, a locking structure is installed at the lower end of the fixed frame. When the door hinge is closed, the locking structure engages with the self-locking groove of the connecting rod, generating a locking force on the door and significantly enhancing the sealing performance after the door is closed. Even when the oven is operating, and the gas inside expands due to heating, increasing the pressure on the door, the locking structure firmly keeps the door tightly sealed to the oven body, effectively preventing heat leakage through the door gaps. This not only ensures a stable internal temperature of the oven and guarantees the cooking effect, but more importantly, it significantly improves the thermal efficiency of the oven, reduces energy consumption, and aligns with the current trend of energy conservation and environmental protection.

[0025] One end of the first spring 5 is connected to a lower spring rod 51, and the first hinge rod 4 is inserted into the lower spring rod 51; the other end of the first spring 5 is connected to an upper spring rod 52, and the connecting post 53 passes through the fixed frame 1 and is connected to the upper spring rod 52 in sequence. The first spring 5 generates a pulling force, which always pulls the drive arm 2 to move away from the end of the connecting rod 3.

[0026] like Figure 5 , Figure 6 As shown: A lower spring rod is connected to one end of the first spring, and a first hinge rod is inserted and connected to the lower spring rod; at the same time, an upper spring rod is connected to the other end of the first spring, and a connecting post passes through the fixed frame and connects to the upper spring rod in sequence. The end connected to the upper spring rod is the fixed end, and the end connected to the lower spring rod is the movable end. The first spring always exerts a certain pulling force on the drive arm, always pulling the drive arm to move away from the connecting rod, ensuring the smooth sliding of the drive arm in the first guide groove, and enhancing the reliability and stability of the door hinge closing process.

[0027] The locking structure 6 includes a push rod 61 and a second spring 62 sleeved on the outer periphery of the push rod 61. A spring seat 13 is provided in the movable cavity 11. One end of the push rod 61 is movably installed in the spring seat 13. It also includes a cam 63 and a rotating shaft 64 inserted in the cam 63. The lower end of the push rod 61 is recessed to form a rotating groove 65. The cam 63 is rotatably installed in the rotating groove 65 through the rotating shaft 64. The second spring 62 generates a thrust, pushing the push rod 61 to move towards the end of the connecting rod 3. The cam 63 is slidably locked in the self-locking groove 31 of the connecting rod 3.

[0028] like Figure 8 As shown, the locking structure includes a push rod and a second spring sleeved and mounted on the outer periphery of the push rod. To accommodate the installation of the second spring, a spring seat is provided within the movable cavity, and one end of the push rod is movably mounted within the spring seat. Furthermore, the locking structure also includes a cam and a rotating shaft inserted inside the cam. A groove for engaging the rotating shaft is recessed at the lower end of the push rod, and the cam is rotatably mounted within the groove via the rotating shaft. Because the push rod is movably connected to the spring seat, during the door closing process, the second spring compresses and stores elastic potential energy during the door opening process. During the door closing process, the elastic potential energy is released, and the push rod, pushed by the second spring, continuously advances towards the connecting rod end. The cam then slides into the self-locking groove of the connecting rod, providing a reliable latching lock for the door's closure and ensuring a secure lock in the closed state. Furthermore, the cam and rotating shaft configuration provides the possibility of unlocking the locking structure, allowing users to smoothly and easily open the door, facilitating user control of the door.

[0029] The lower end of the fixed frame 1 is provided with a second guide groove 14. The two ends of the rotating shaft 64 protrude from the rotating groove 65 and extend into the second guide groove 14. The push rod 61 slides along the second guide groove 14.

[0030] like Figure 7 As shown: A second guide groove is provided at the lower end of the fixed frame. The two ends of the rotating groove protrude from the rotating groove and continue to extend to connect with the second guide groove, providing a precise trajectory for the movement of the locking structure. The push rod operates on the preset movement trajectory, providing guidance and support for the push rod, ensuring the stability of the locking structure during operation, avoiding jamming or misalignment during the movement process, and further improving the reliability and durability of the door hinge.

[0031] The inner wall of the active cavity 11 is provided with a limiting plate 15. Correspondingly, the two sides of the drive arm 2 are recessed with limiting grooves 21. The limiting plate 15 is placed in the limiting grooves 21 to limit the displacement stroke of the drive arm 2.

[0032] like Figure 6 , Figure 7As shown: A limiting plate is provided on the inner wall of the active cavity. Corresponding to the position of the limiting plate, a limiting groove is recessed on both sides of the drive arm. The limiting plate is placed in the limiting groove to limit the displacement stroke of the drive arm. This can accurately control the movement range of the drive arm, prevent the drive arm from exceeding the preset shape and colliding or falling off, and improve the overall stability and service life of the door hinge.

[0033] In summary, this hinge structure includes a drive arm that works in conjunction with a first spring to generate a closing and resetting force on the door. It should be noted that during the closing process, the drive arm, under the tension of the first spring, slides smoothly along the first guide groove in the movable cavity. Furthermore, under the tension of the first spring, the drive arm pulls the lever, causing it to swing relative to the fixed frame, thus generating the closing and resetting force.

[0034] A locking structure is installed at the lower end of the fixed frame. When the door hinge is closed, the locking structure engages with the self-locking groove of the connecting rod, generating a locking force on the door and significantly enhancing the sealing performance after the door is closed. The second spring in the locking structure constantly pushes the push rod, and the cam slides and engages with the self-locking groove of the connecting rod to ensure the door is locked stably, thus allowing for widespread use.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An electric oven door hinge, characterized in that: Includes a fixed frame (1) connected to the door body, the two side walls of the fixed frame (1) enclose a movable cavity (11), and the drive arm (2) is movably installed in the movable cavity (11); It also includes a connecting rod (3) that is fastened to the box body, which is hinged to the bottom of the fixed frame (1); A first guide groove (12) is provided above the side wall of the movable cavity (11). The upper end of the drive arm (2) is slidably installed in the first guide groove (12) through the first hinge rod (4). The lower part of the drive arm (2) is hinged to the connecting rod (3). A first spring (5) is also installed in the movable cavity (11). One end of the first spring (5) is connected to the first hinge rod (4), and the other end of the first spring (5) is connected to the fixed frame (1). The first spring (5) pulls the drive arm (2) to slide along the first guide groove (12), thereby pulling the connecting rod (3) to swing relative to the fixed frame (1) and generating a door closing and resetting force. It also includes a locking structure (6) set at the lower end of the fixed frame (1). When the door hinge is closed, the locking structure (6) engages with the self-locking groove (31) of the connecting rod (3) to generate a closing locking force.

2. The electric oven door hinge according to claim 1, characterized in that: One end of the first spring (5) is connected to a lower spring rod (51), and the first hinge rod (4) is inserted into the lower spring rod (51); The other end of the first spring (5) is connected to the upper spring rod (52). The connecting column (53) passes through the fixed frame (1) and is connected to the upper spring rod (52). The first spring (5) generates tension, which always pulls the drive arm (2) to move away from the connecting rod (3).

3. The electric oven door hinge according to claim 1, characterized in that: The locking structure (6) includes a push rod (61) and a second spring (62) sleeved on the outer periphery of the push rod (61). A spring seat (13) is provided in the movable cavity (11). One end of the push rod (61) is movably installed in the spring seat (13). It also includes a cam (63) and a rotating shaft (64) inserted in the cam (63). The lower end of the push rod (61) is recessed to form a rotating groove (65). The cam (63) is rotatably installed in the rotating groove (65) through the rotating shaft (64). The second spring (62) generates a thrust to push the push rod (61) to move towards the end of the connecting rod (3). The cam (63) is slidably locked in the self-locking groove (31) of the connecting rod (3).

4. The electric oven door hinge according to claim 3, characterized in that: The lower end of the fixed frame (1) is provided with a second guide groove (14), the two ends of the rotating shaft (64) protrude from the rotating groove (65) and extend into the second guide groove (14), and the push rod (61) slides along the second guide groove (14).

5. The electric oven door hinge according to claim 1, characterized in that: The inner wall of the active cavity (11) is provided with a limiting plate (15). Correspondingly, the two sides of the drive arm (2) are recessed and provided with limiting grooves (21). The limiting plate (15) is placed in the limiting grooves (21) to limit the displacement stroke of the drive arm (2).

Images