Door hinge for cooking appliance and cooking appliance having the same

Abstract

The present invention discloses a door hinge for a cooking appliance and a cooking appliance having the same. The door hinge of the cooking appliance includes: a door mounting rod; a hinge seat, the lower end of which is pivotally mounted on the hinge seat so that the door can be flipped relative to a cabinet between an open position and a closed position; a sliding member slidably mounted on the door mounting rod along the length direction of the door mounting rod between a first position and a second position, the sliding member being in the first position when the door is in the closed position and in the second position when the door is in the open position; a first elastic member, respectively connected to the door mounting rod and the sliding member and constantly driving the sliding member to move toward the first position; and a damping device, respectively connected to the sliding member and the door mounting rod so that the sliding member needs to overcome a predetermined friction force when sliding relative to the door mounting rod. The door hinge of the cooking appliance according to the embodiment of the present invention has the advantages of being easy to use and highly reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical appliance manufacturing, and in particular to a door hinge of a cooking appliance and a cooking appliance having the door hinge of the cooking appliance. Background Art

[0002] In related art cooking appliances, door hinges utilize the torque of a spring's elastic force to balance the torque of the door's gravity, allowing the door to hover at any angle during its rotation. However, this door hinge structure has certain limitations. The spring stiffness corresponds to the door's weight, requiring the spring tension to be adjusted accordingly for doors of varying weights. This affects the door hinge's versatility and hinders the assembly efficiency of the cooking appliance. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a door hinge for a cooking utensil, which has the advantages of being easy to use and highly reliable.

[0004] The present invention also provides a cooking appliance having the door hinge of the cooking appliance.

[0005] To achieve the above-mentioned purpose, according to an embodiment of the first aspect of the present invention, a door hinge of a cooking appliance is proposed, wherein the door hinge of the cooking appliance comprises: a door mounting rod, on which the door of the cooking appliance is mounted; a hinge seat, which is mounted on the box body of the cooking appliance, and the lower end of the door mounting rod is pivotally mounted on the hinge seat so that the door can be flipped relative to the box body between an open position and a closed position; a sliding member, which is slidably mounted on the door mounting rod along the length direction of the door mounting rod between a first position and a second position. On the rod, the sliding member is connected to the hinge seat and slides relative to the door body mounting rod as the door body flips, when the door body is in the closed position, the sliding member is in the first position, and when the door body is in the open position, the sliding member is in the second position; a first elastic member, the first elastic member is respectively connected to the door body mounting rod and the sliding member and often drives the sliding member to move toward the first position; a damping device, the damping device is respectively connected to the sliding member and the door body mounting rod so that the sliding member needs to overcome a predetermined friction force when sliding relative to the door body mounting rod.

[0006] The door hinge of the cooking appliance according to the embodiment of the present invention has the advantages of being easy to use and highly reliable.

[0007] In addition, the door hinge of the cooking appliance according to the above embodiment of the present invention may also have the following additional technical features:

[0008] According to one embodiment of the present invention, the damping device includes: a friction plate, which is clamped between the outer surface of the sliding member and the inner surface of the door body mounting rod.

[0009] According to one embodiment of the present invention, the sliding member includes at least two sliding member side plates and a sliding member connecting plate connecting the two sliding member side plates, the door body mounting rod includes at least two mounting rod side plates and a mounting rod connecting plate connecting the two mounting plate side plates, and there are two friction plates and they are respectively clamped between adjacent sliding member side plates and mounting rod side plates.

[0010] According to an embodiment of the present invention, the door hinge of the cooking appliance further comprises a compression spring, and the compression spring is compressed between the two side plates of the sliding member.

[0011] According to one embodiment of the present invention, the door hinge of the cooking appliance further comprises a threaded adjustment member, wherein the threaded adjustment member is threadably engaged with the friction plate and abuts against the sliding member.

[0012] According to one embodiment of the present invention, the door hinge of the cooking appliance further comprises a traction belt, a roller is provided on the door mounting rod, one end of the traction belt is connected to the sliding member and the other end is pivotally connected to the upper end of the hinge seat through the roller.

[0013] According to one embodiment of the present invention, a sleeve is sleeved on the roller, and the sleeve is rotatable relative to the roller.

[0014] According to one embodiment of the present invention, the door hinge of the cooking utensil further includes a pressure rod and a second elastic member, wherein the pressure rod is relatively slidably mounted on the door mounting rod along the length direction of the door mounting rod, and a stop boss is provided on the upper surface of the hinge seat, and the second elastic member is respectively connected to the pressure rod and the door mounting rod, and when the door body is in the closed position, the second elastic member presses the pressure rod against the upper surface of the hinge seat and the stop boss stops the pressure rod to interfere with the rotation of the door body, and when the door body moves from the closed position to the open position, the pressure rod overcomes the elastic force of the second elastic member and passes over the stop boss so that the door body can flip relative to the box body.

[0015] According to one embodiment of the present invention, a roller is sleeved on the pressure rod.

[0016] According to one embodiment of the present invention, the connection between the stopping boss and the upper surface of the hinge seat has a smooth transition.

[0017] According to one embodiment of the present invention, the door hinge of the cooking appliance also includes a stop rod, which is pivotally mounted on the hinge seat between a stop position and an avoidance position. When the stop rod is at the stop position, it is supported on the door mounting rod to prevent the door from closing. When the stop rod is at the avoidance position, it avoids the door mounting rod.

[0018] According to one embodiment of the present invention, the door hinge of the cooking appliance also includes a rotating shaft and a sliding shaft. The lower end of the door mounting rod is pivotally connected to the hinge seat through the rotating shaft. The hinge seat is provided with a horizontal sliding groove oriented along the horizontal direction, and the door mounting rod is provided with a longitudinal sliding groove oriented along its length direction. The sliding shaft can be slidably engaged in the horizontal sliding groove and the longitudinal sliding groove.

[0019] According to an embodiment of a second aspect of the present invention, a cooking appliance is provided. The cooking appliance includes the door hinge of the cooking appliance according to the embodiment of the first aspect of the present invention.

[0020] The cooking appliance according to the embodiment of the present invention has the advantages of being easy to use and highly reliable by utilizing the door hinge of the cooking appliance according to the embodiment of the first aspect of the present invention.

[0021] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0023] Figure 1 2 is a schematic structural diagram of a door hinge of a cooking appliance according to an embodiment of the present invention.

[0024] Figure 2 2 is a schematic structural diagram of a door hinge of a cooking appliance according to an embodiment of the present invention.

[0025] Figure 3 FIG. 4 is an exploded view of a door hinge of a cooking appliance according to an embodiment of the present invention.

[0026] Figure 4 2 is a schematic structural diagram of a door hinge of a cooking appliance according to an embodiment of the present invention.

[0027] Figure 5 is a cross-sectional view of a door hinge of a cooking appliance according to an embodiment of the present invention.

[0028] Figure 6 is a cross-sectional view of a door hinge of a cooking appliance according to an embodiment of the present invention.

[0029] Figure 7 is a cross-sectional view of a door hinge of a cooking appliance according to an embodiment of the present invention.

[0030] Figure 8 is a cross-sectional view of a door hinge of a cooking appliance according to an embodiment of the present invention.

[0031] Figure 9 is a cross-sectional view of a door hinge of a cooking appliance according to an embodiment of the present invention.

[0032] Figure 10 yes Figure 9 Enlarged view of point D in the middle.

[0033] Figure 11 1 is a schematic diagram of a partial structure of a door hinge of a cooking appliance according to an embodiment of the present invention.

[0034] Figure 12 1 is a schematic diagram of a partial structure of a door hinge of a cooking appliance according to an embodiment of the present invention.

[0035] Figure 13 1 is a schematic diagram of a partial structure of a door hinge of a cooking appliance according to an embodiment of the present invention.

[0036] Figure 14 Schematic diagram of the structure of a friction plate of a door hinge of a cooking appliance according to an embodiment of the present invention.

[0037] Reference numerals: door hinge 1, door mounting rod 100, mounting rod side plate 110, roller slide 111, mounting rod connecting plate 120, roller 130, sleeve 131, longitudinal slide 140, sliding member bracket 150, limiting groove 151, pressure rod bracket 160, first hanging shaft 170, hinge seat 200, stop boss 210, stop rod 220, transverse slide 230, sliding member 300, sliding member side plate 310, sliding member connecting plate 320, second hanging shaft 330, pin 34 0, first locating pin 350, second locating pin 360, first locating hole 371, second locating hole 372, first elastic member 400, hanging ring 410, damping device 500, friction plate 510, threaded hole 511, compression spring 520, threaded adjustment member 530, traction belt 600, transmission member 610, pressure rod 710, roller 711, roller bracket 712, roller shaft 713, second elastic member 720, rotating shaft 810, sliding shaft 820, limiting shaft sleeve 830, connecting shaft 840. DETAILED DESCRIPTION

[0038] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0039] Hereinafter, a door hinge 1 for a cooking appliance according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0040] like Figures 1-14 As shown, the door hinge 1 of the cooking appliance according to the embodiment of the present invention includes a door mounting rod 100 , a hinge seat 200 , a sliding member 300 , a first elastic member 400 and a damping device 500 .

[0041] The door of the cooking appliance is mounted on the door mounting rod 100. The hinge base 200 is mounted on the housing of the cooking appliance. The lower end of the door mounting rod 100 is pivotally mounted on the hinge base 200 so that the door can be flipped relative to the housing between an open position and a closed position (up and down directions as shown in FIG. Figure 1 and Figure 2 (as indicated by arrow A in the figure). The sliding member 300 is slidably mounted on the door-mounting rod 100 along the length of the door-mounting rod 100 between a first position and a second position. The sliding member 300 is connected to the hinge seat 200 and slides relative to the door-mounting rod 100 as the door body flips. When the door body is in the closed position, the sliding member 300 is in the first position, and when the door body is in the open position, the sliding member 300 is in the second position. The first elastic member 400 is respectively connected to the door-mounting rod 100 and the sliding member 300 and constantly drives the sliding member 300 to move toward the first position. The damping device 500 is respectively connected to the sliding member 300 and the door-mounting rod 100 so that the sliding member 300 needs to overcome a predetermined friction force when sliding relative to the door-mounting rod 100.

[0042] What needs to be understood here is that “the sliding member 300 is connected to the hinge seat 200 ” should be understood in a broad sense, including that the sliding member 300 is directly connected to the hinge seat 200 and that the sliding member 300 is indirectly connected to the hinge seat 200 through other structures.

[0043] The working process of the door hinge 1 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0044] During the door body flipping process, the door body mounting rod 100 rotates relative to the hinge seat 200, and the sliding member 300 slides relative to the door body mounting rod 100 as the door body mounting rod 100 rotates. The sliding member 300 drives the first elastic member 400 to slide relative to the door body mounting rod 100 from the first position to the second position. The first elastic member 400 constantly drives the sliding member 300 to move toward the first position. The damping device 500 increases the friction force of the sliding member 300 when the sliding member 300 slides relative to the door body mounting rod 100. The torque generated by the elastic force of the first elastic member 400 and the friction force of the sliding member 300 offsets the torque of the door body, thereby achieving torque balance of the door hinge 1.

[0045] According to the door hinge 1 of the cooking appliance according to the embodiment of the present invention, by providing a door mounting rod 100, a hinge seat 200, a sliding member 300 and a first elastic member 400, during the flipping process of the door body, the torque generated by the elastic force of the first elastic member 400 can be used to offset the torque generated by the gravity of the door body, so that the door body can hover at any door opening angle, which is convenient for the user to adjust the opening angle of the door body according to actual needs, thereby improving the user's operating comfort and convenience, and improving the user's usage experience.

[0046] Furthermore, by providing a damping device 500, the sliding member 300 has a certain friction force when sliding relative to the door body mounting rod 100. In this way, the friction force of the sliding member 300 and the elastic force of the first elastic member 400 can be used to jointly generate a balancing torque to offset the torque of the door body, so that the door body can hover at any door opening angle. Compared with the door body hinge in the related art, it is only necessary to set the torque of the elastic force of the first elastic member 400 and the torque of the door body to be close to each other. There is no need to accurately set the elastic force of the first elastic member 400 and the gravity of the door body so that the torque of the elastic force is exactly equal to the torque of the gravity. The torque generated by the friction force of the sliding member 300 can be used to supplement the difference between the torque of the elastic force and the torque of the gravity, thereby achieving torque balance of the door body hinge 1. This not only makes it easier to reduce the design accuracy requirements of the door hinge 1, facilitates the production and manufacturing of the door hinge 1, improves the production efficiency of the door hinge 1, and reduces the cost of the door hinge 1, thereby reducing the design difficulty of the cooking utensil, improving the production efficiency of the cooking utensil, and reducing the cost of the cooking utensil, but also makes it easier to improve the hovering reliability of the door body, avoids the design or manufacturing errors of the door hinge 1 affecting the hovering effect of the door body, and improves the reliability and stability of the cooking utensil.

[0047] In addition, by providing a damping device 500, the torque of the door body is balanced by the torque generated by the friction force of the sliding member 300 and the elastic force of the first elastic member 400. Compared with the door hinge in the related art, the door hinge 1 can be matched with a variety of door bodies of different weights, which facilitates the adaptation of the door hinge 1 to different models of the cooking utensils. It can avoid the need to adjust the tension of the first elastic member 400 accordingly when adapting to a variety of door bodies of different weights, thereby improving the versatility and scope of use of the door hinge 1, reducing the design cost of the door hinge 1, shortening the assembly time of the door hinge 1, improving the assembly efficiency of the door hinge 1, reducing the assembly cost of the door hinge 1, and thus reducing the cost of the cooking utensils.

[0048] In other words, the provision of the damping device 500 can reduce the precision requirements for the first elastic member 400. Conversely, the provision of the first elastic member 400 can also reduce the precision requirements for the damping device 500 compared to the arrangement of providing the damping device 500 alone. This can reduce the precision requirements for the various components of the door hinge 1, facilitate the design, production, and assembly of the door hinge 1, simplify the assembly operation of the cooking appliance, improve the assembly efficiency of the cooking appliance, and reduce the assembly cost of the cooking appliance.

[0049] Therefore, the door hinge 1 of the cooking appliance according to the embodiment of the present invention has the advantages of being easy to use and highly reliable.

[0050] The following describes a door hinge 1 for a cooking appliance according to a specific embodiment of the present invention with reference to the accompanying drawings.

[0051] In some specific embodiments of the present invention, Figures 1-14 As shown, the door hinge 1 of the cooking appliance according to the embodiment of the present invention includes a door mounting rod 100 , a hinge seat 200 , a sliding member 300 , a first elastic member 400 and a damping device 500 .

[0052] Specifically, if Figure 10 As shown, the damping device 500 includes a friction plate 510, which is clamped between the outer surface of the sliding member 300 and the inner surface of the door mounting rod 100. This not only facilitates the installation of the friction plate 510, but also can be used to increase the friction force of the sliding member 300 during sliding, further facilitating the improvement of the door's hovering effect at any opening angle.

[0053] More specifically, if Figure 3 and Figure 13As shown, the sliding member 300 includes at least two sliding member side plates 310 and a sliding member connecting plate 320 connecting the two sliding member side plates 310. The door body mounting rod 100 includes at least two mounting rod side plates 110 and a mounting rod connecting plate 120 connecting the two mounting plate side plates 110. There are two friction plates 510, which are respectively clamped between adjacent sliding member side plates 310 and mounting rod side plates 110. This not only further improves the friction force of the sliding member 300 when sliding and increases the damping effect of the friction plate 510, but also makes the force applied to the sliding member 300 more uniform, thereby improving the structural stability and reliability of the door body hinge 1.

[0054] Furthermore, if Figure 10 As shown, the door mounting rod 100 further includes a compression spring 520, which is squeezed between the two sliding member side plates 310. Thus, under the elastic force of the compression spring 520, the friction plate 510 and the mounting rod side plates 110 can be pressed against each other, thereby increasing the friction coefficient between the friction plate 510 and the mounting rod side plates 110, and further increasing the friction force when the sliding member 300 slides.

[0055] Furthermore, if Figure 3 and Figure 13 As shown, the sliding member 300 has a pin shaft 340 and a second positioning hole 372 , and the compression spring 520 is sleeved on the pin shaft 340 . The compression spring 520 fits in the second positioning hole 372 of the sliding member 300 , and both ends of the compression spring 520 respectively contact the friction plate 510 .

[0056] Alternatively, as Figure 10 As shown, the door mounting rod 100 further includes a threaded adjustment member 530, which is threadedly engaged with the friction plate 510 and abuts against the sliding member 300. The threaded adjustment member 530 can be used to adjust the contact force between the friction plate 510 and the sliding member side plate 310, thereby improving the flexibility and applicability of the damping device 500 and further improving the damping effect of the damping device 500.

[0057] Specifically, if Figure 3 As shown, the door mounting rod 100 further includes a traction belt 600. A roller 130 is provided on the door mounting rod 100. One end of the traction belt 600 is connected to the sliding member 300, and the other end is pivotally connected to the upper end of the hinge seat 200 via the roller 130. Thus, when the traction belt 600 rotates relative to the hinge seat 200, the traction belt 600 will bend and deform at the roller 130, thereby driving the sliding member 300 to slide relative to the door mounting rod 100, thereby causing the sliding member 300 to drive the first elastic member 400 to slide, thereby increasing the tensile deformation of the first elastic member 400.

[0058] Alternatively, as Figure 3As shown, the traction belt 600 has a transmission member 610, one end of the traction belt 600 is connected to the sliding member 300 through the first positioning pin 350, and the other end is connected to the transmission member 610 through the second positioning pin 360. The transmission member 610 is pivotally mounted on the hinge seat 200 through the connecting shaft 840.

[0059] More specifically, if Figure 3 As shown, a sleeve 131 is sleeved on the roller 130, and the sleeve 131 is rotatable relative to the roller 130. In this way, the sleeve 131 can convert the sliding friction between the roller 130 and the traction belt 600 into rolling friction, thereby reducing the friction between the roller 130 and the traction belt 600, facilitating the traction belt 600 to smoothly drive the sliding member 300 to slide, and improving the movement accuracy of the door hinge 1.

[0060] Alternatively, as Figure 3 As shown, the door body mounting rod 100 has a sliding member bracket 150, which is fixedly mounted on the door body mounting rod 100 by rivets, and the sliding member 300 is slidably mounted on the sliding member bracket 150 along the length direction of the door body mounting rod 100 between the first position and the second position.

[0061] Furthermore, if Figure 3 and Figure 13 As shown, the slider 300 has a second hanging shaft 330 and a first positioning hole 371. The second hanging shaft 330 passes through the first positioning hole 371 and fits into the limiting groove 151 of the slider bracket 150. The second hanging shaft 330 can slide up and down along the limiting groove 151 to allow the slider 300 to move up and down within the slider bracket 150. The first elastic member 400 has a hanging ring 410 at each end. One end of the first elastic member 400 is hung on the first hanging shaft 170, and the other end is hung on the second hanging shaft 330.

[0062] Specifically, the sliding member bracket 150 , the friction plate 510 , and the sliding member 300 are sequentially sleeved on the second hanging shaft 330 and the pin shaft 340 .

[0063] More specifically, the threaded adjustment member 530 is a set screw. There are two set screws that are respectively tightened in the threaded holes 511 of the friction plate 510. One end of the set screw 23 contacts the sliding member 300, and the other end can slide in the slot 701 of the sliding member bracket 150.

[0064] Alternatively, as Figure 3As shown, the door body mounting rod 100 also includes a pressure rod 710 and a second elastic member 720. The pressure rod 710 can be relatively slidably installed on the door body mounting rod 100 along the length direction of the door body mounting rod 100. A stop boss 210 is provided on the upper surface of the hinge seat 200. The second elastic member 720 is respectively connected to the pressure rod 710 and the door body mounting rod 100. When the door body is in the closed position, the second elastic member 720 presses the pressure rod 710 against the upper surface of the hinge seat 200 and the stop boss 210 stops the pressure rod 710 to interfere with the rotation of the door body. When the door body moves from the closed position to the open position, the pressure rod 710 overcomes the elastic force of the second elastic member 720 and passes over the stop boss 210 so that the door body can flip relative to the box body. In this way, when the door body moves from the closed position to the open position, it is necessary to overcome the elastic force of the second elastic member 720 to pass over the stop boss 210. Therefore, the user needs a certain external force to open the door body, which is convenient for improving the locking effect of the door body and the sealing of the door body, thereby improving the cooking effect and working reliability of the cooking utensil.

[0065] Furthermore, if Figure 3 As shown, the pressure rod 710 is sleeved with a roller 711. In this way, the roller 711 can be used to convert sliding friction into rolling friction, which can reduce the friction between the pressure rod 710 and the stop boss 210, facilitate the pressure rod 710 to move smoothly, and facilitate improving the mechanical efficiency of the door hinge 1.

[0066] Alternatively, as Figure 3 As shown, the door mounting rod 100 is provided with a pressure rod bracket 160, which is fixed to the door mounting rod 100 via rivets. A pressure rod 710 has a roller bracket 712 at its lower end, which is fixed to the roller bracket 712 via screws. The upper end of the pressure rod 710 is inserted into a mating hole in the pressure rod bracket 160. The roller bracket 712 has a through hole, into which a roller shaft 713 fits. A roller 711 is sleeved on the roller shaft 713 and is rotatable relative to the roller shaft 713.

[0067] Furthermore, the second elastic member 720 is a longitudinal compression spring, which is sleeved onto the pressure rod 710 and has a certain amount of pre-compression. One end of the second elastic member 720 contacts the roller bracket 712, and the other end contacts the pressure rod bracket 160. The roller shaft 713 can slide up and down along the roller slot 111 of the door mounting rod 100. When the door is in the closed position, the roller shaft 713 is located at the lower end of the slot slot 111 under the pressure of the second elastic member 720.

[0068] Specifically, the connection between the stop boss 210 and the upper surface of the hinge base 200 is smoothly transitioned. This not only helps to reduce stress concentration at the connection between the stop boss 210 and the upper surface of the hinge base 200, but also helps the pressure rod 710 to move smoothly.

[0069] Alternatively, as Figure 3 As shown, the door mounting rod 100 further includes a stop rod 220, which is pivotally mounted on the hinge base 200 between a stop position and a circumventing position. When in the stop position, the stop rod 220 is supported on the door mounting rod 100 to prevent the door from closing, and when in the circumventing position, the stop rod 220 clears the door mounting rod 100. In this way, the stop rod 220 can be used to stop the door to prevent it from closing, making it easier for the user to disassemble the door, simplifying the user's operation process, and making it easier for the user to clean and maintain the door.

[0070] Specifically, if Figure 3 As shown, the door mounting rod 100 further includes a rotating shaft 810 and a sliding shaft 820. The lower end of the door mounting rod 100 is pivotally connected to the hinge seat 200 via the rotating shaft 810. The hinge seat 200 is provided with a horizontally oriented transverse slide groove 230, and the door mounting rod 100 is provided with a longitudinal slide groove 140 oriented along its length. The sliding shaft 820 is slidably engaged in the transverse slide groove 230 and the longitudinal slide groove 140. In this way, the transverse slide groove 230 and the longitudinal slide groove 140 can be used to limit the rotation of the door mounting rod 100, which not only facilitates improving the rotation accuracy of the door mounting rod 100, but also facilitates simplifying the processing technology of the transverse slide groove 230 and the longitudinal slide groove 140 compared to the method of providing an arc-shaped limiting groove, further facilitating improving the processing efficiency of the door hinge 1.

[0071] More specifically, the door mounting rod 100 is pivotally mounted on the hinge seat 200 via the rotating shaft 810 . The rotating shaft 810 and the sliding shaft 820 are covered with a limiting sleeve 830 . The limiting sleeve 830 serves to limit the door mounting rod 100 .

[0072] Specifically, if Figure 6As shown, when the door mounting rod 100 rotates at an angle of 12 degrees relative to the hinge seat 200, the roller 711 contacts the highest point of the stop boss 210, and the roller shaft 713 slides upward along the roller slot 111 of the door mounting rod 100 to the top of the roller slot 111. The roller shaft 713 drives the roller bracket 712 to compress the second elastic member 720 upward, thereby generating a large resistance force at the contact point between the roller 711 and the surface of the stop boss 210. When the door mounting rod 100 rotates at an angle of less than 12 degrees relative to the hinge seat 200, the resistance force generates a closing torque on the door mounting rod 100, thereby enabling the door to automatically close and effectively locking the door after closing, ensuring that the door has a good sealing performance.

[0073] According to Hooke's law, when a spring is deformed, it generates a deformation force F1 = KX, where K is the spring's stiffness and X is its deformation. F1, transmitted through the traction belt 600, ultimately acts on the hinge point between the transmission member 610 and the hinge seat 200. Assuming the spring force F1's lever arm on the rotating shaft 810 is L, this force F1 will generate a balancing torque M1 = F1 × L on the rotating shaft 810. Assuming the door's mass is evenly distributed and its center of gravity is located at its geometric center, the moment exerted by the door's weight on the rotating shaft 810 is M = 0.5 mgHsinθ, where H is the door's height. By selecting an appropriate spring stiffness K value, the balancing torque M1 can be made equal to the torque M of the door's weight, satisfying the door's balance condition M1 = M, thereby balancing the oven door.

[0074] Once the stiffness of the first elastic member 400 of the hinge 1 is selected, the elastic force provided by the first elastic member 400 during the door opening process is fixed, and the torque of the elastic force can only balance the torque of the weight of the door body of a certain mass. The stiffness K value of the first elastic member 400 corresponds one-to-one with the door body mass M. To accommodate doors of varying mass, a damping device 500 is designed between the first elastic member 400 and the traction belt 600. One end of the damping device 500 is connected to the first elastic member 400, and the other end is connected to the traction belt 600. During the opening process of the hinge 1, the traction belt 600 drives the slider 300 to move along the slider bracket 150, causing the friction plate 510, which is mounted on the second hanging shaft 330 and the pin 340, to slide relative to the slider bracket 150.

[0075] After hinge 1 is assembled, compression spring 520 is pre-compressed. Under the pressure of compression spring 520, friction plate 510 tightly contacts the contact surface of slider bracket 150, generating a sliding friction force F2 during sliding. This sliding friction force F2 is transmitted via traction belt 600 and ultimately acts on the hinge point between transmission member 610 and hinge seat 200, thereby generating a torque M2 on rotating shaft 810. To ensure optimal balance for the door body equipped with hinge 1, a threaded adjustment member 530 is added to damping device 500. Threaded adjustment member 530 is a set screw that adjusts the contact force between friction plate 510 and slider bracket 150. The magnitude of the friction torque is determined by the stiffness of compression spring 520 and threaded adjustment member 530. Friction plate 510 is made of a non-metallic, wear-resistant, and high-temperature-resistant material. Under the combined effect of the balancing torque M1 and the friction torque M2 , the hinge 1 can be adapted to door bodies of different masses, thereby greatly improving the versatility of the hinge 1 and reducing the design cost of the hinge 1 .

[0076] During the flipping process of the door body from the closed position to the open position, the sliding shaft 820 slides from the inside to the outside along the horizontal sliding groove 230 on the hinge seat 200, and at the same time, the sliding shaft 820 slides from the top to the bottom along the longitudinal sliding groove 140 of the door body mounting rod 100. The sliding shaft 820 limits the hinge 1 so that the maximum rotation angle of the hinge 1 will not exceed 90 degrees.

[0077] The working process of the door hinge 1 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0078] During the door flipping process, the door mounting rod 100 rotates about the rotating shaft 810, the transmission member 610 rotates about the connecting shaft 840, and the sleeve 131 contacts and presses against the traction belt 600, causing the traction belt 600 to bend and deform at the tangent point with the sleeve 131. During the bending and deformation process, the traction belt 600 drives the slider 300 to slide downward along the limiting groove 151 of the slider bracket 150. One end of the first elastic member 400 is suspended on the first hanging shaft 170, and the other end is suspended on the second hanging shaft 330. When the slider 300 slides, it drives the first elastic member 400 downward through the second hanging shaft 330 to generate elastic deformation, causing the first elastic member 400 to generate a large elastic force. The friction plate 510 generates a large friction force when the slider 300 slides. The torque generated by the elastic force of the first elastic member 400 and the friction force of the slider 300 offsets the torque of the door's gravity, thereby achieving torque balance of the door hinge 1.

[0079] The following describes a cooking appliance according to an embodiment of the present invention. The cooking appliance according to the embodiment of the present invention includes the door hinge 1 of the cooking appliance according to the above-mentioned embodiment of the present invention.

[0080] The cooking appliance according to the embodiment of the present invention has the advantages of being easy to use and highly reliable by utilizing the door hinge 1 of the cooking appliance according to the above embodiment of the present invention.

[0081] Other structures and operations of the cooking appliance according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0082] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In the description of the present invention, a first feature "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them.

[0083] In the description of the present invention, “on”, “above” and “above” a first feature of a second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0084] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0085] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0086] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A door hinge for a cooking appliance, characterized in that: include: a door mounting rod, on which the door of the cooking appliance is mounted; a hinge seat mounted on the housing of the cooking appliance, wherein the lower end of the door mounting rod is pivotally mounted on the hinge seat so that the door can be flipped relative to the housing between an open position and a closed position; a sliding member, the sliding member being slidably mounted on the door body mounting rod along the length direction of the door body mounting rod between a first position and a second position, the sliding member being connected to the hinge seat and sliding relative to the door body mounting rod as the door body flips, the sliding member being in the first position when the door body is in the closed position, and being in the second position when the door body is in the open position; a first elastic member, the first elastic member being connected to the door mounting rod and the sliding member respectively and normally driving the sliding member to move toward the first position; A damping device, wherein the damping device is respectively connected to the sliding member and the door body mounting rod so that the sliding member needs to overcome a predetermined friction force when sliding relative to the door body mounting rod; and further comprising a traction belt, wherein a roller is provided on the door body mounting rod, one end of the traction belt is connected to the sliding member and the other end is pivotally connected to the upper end of the hinge seat through the roller, and a sleeve is provided on the roller, and the sleeve is rotatable relative to the roller; the damping device comprises: a friction plate, the friction plate being clamped between the outer surface of the sliding member and the inner surface of the door body mounting rod; The sliding member includes at least two sliding member side plates and a sliding member connecting plate connecting the two sliding member side plates, the door body mounting rod includes at least two mounting rod side plates and a mounting rod connecting plate connecting the two mounting plate side plates, there are two friction plates and they are respectively clamped between the adjacent sliding member side plates and the mounting rod side plates; it also includes a compression spring, which is squeezed between the two sliding member side plates; it also includes a threaded adjustment member, which is threadedly engaged with the friction plate and stopped on the sliding member.

2. The door hinge of a cooking appliance according to claim 1, characterized in that: The cam is adapted to engage the door mounting rod and engage with the second elastic member so as to engage with the door mounting rod and engage with the second elastic member so as to engage with the door mounting rod.

3. The door hinge of a cooking appliance according to claim 2, characterized in that: A roller is sleeved on the pressure rod.

4. The door hinge of a cooking appliance according to claim 2, characterized in that: The connection between the stopping boss and the upper surface of the hinge seat is smoothly transitioned.

5. The door hinge of a cooking appliance according to claim 1, characterized in that: It also includes a stop rod, which is pivotally mounted on the hinge seat between a stop position and an avoidance position. When the stop rod is in the stop position, it is supported on the door body mounting rod to prevent the door body from closing. When the stop rod is in the avoidance position, it avoids the door body mounting rod.

6. The door hinge of a cooking appliance according to claim 1, characterized in that: It also includes a rotating shaft and a sliding shaft. The lower end of the door body mounting rod is pivotally connected to the hinge seat through the rotating shaft. The hinge seat is provided with a horizontal sliding groove oriented along the horizontal direction, and the door body mounting rod is provided with a longitudinal sliding groove oriented along its length direction. The sliding shaft can be slidably engaged in the horizontal sliding groove and the longitudinal sliding groove.

7. A cooking utensil, characterized in that: A door hinge for a cooking appliance according to any one of claims 1 to 6.

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