Electric appliance box door hinge with buffering function

Abstract

A kind of electric appliance box door hinge with buffering function, including installation frame, hinged arm, pull arm and movable arm are installed in installation frame, the pull arm is slidably connected to the upper end of installation frame, one end of the movable arm is connected with the pull arm by hinge rod, the other end of movable arm is hinged with hinged arm;Damping device is installed in the pull arm, one end of the damping device is fixed on the first guide rod, the inner guide groove is formed in the end surface of pull arm, the first guide rod is connected in the inner guide groove;The outer mounting hole is formed in the end surface of installation frame, the first guide rod is connected in the outer mounting hole;The inner mounting hole is formed in the upper end of pull arm, the second guide rod is installed in the inner mounting hole, the outer guide groove is formed in the upper end of installation frame, the second guide rod is connected with the inner mounting hole by passing through the outer guide groove;Pull spring is also installed in the installation frame, pull spring pulls pull arm and movable arm to move, and generates door closing reset force.

Description

Technical Field

[0001] This utility model relates to the field of household appliance cabinet door technology, specifically an appliance cabinet door hinge with a buffer function. Background Technology

[0002] In modern household appliances, door hinges, as crucial components connecting the door and the cabinet, are responsible for opening, closing, and securing the door. Currently, most door hinges rely on the elastic force of a return spring to close the door. However, during the closing process, as the door's acceleration gradually increases, the force generated by the return spring can rapidly push the door shut, easily causing the door to collide with the cabinet, resulting in significant noise, affecting the user experience, and potentially harming the oven's long-term performance. Therefore, without a buffer mechanism to control the door's movement speed, the door will not only suffer severe impacts leading to damage, but the elasticity of the return spring may also gradually weaken, exacerbating the impact damage and shortening the lifespan of the hinge. Furthermore, weakened return spring elasticity can cause the door hinge to lose its basic function. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of existing technologies and provide an electrical box door hinge with a buffer function that is simple in structure, low in manufacturing cost, allows for smooth door closure, controllable closing speed, improves user experience, and extends product lifespan.

[0004] The purpose of this utility model is achieved in the following way: an electrical box door hinge with a buffer function includes a mounting frame connected to the door body and a hinge arm hinged to the lower end of the mounting frame. The hinge arm is connected to the box body. A pull arm and a movable arm are installed inside the mounting frame. The pull arm is slidably connected to the upper end of the mounting frame. One end of the movable arm is connected to the pull arm through a hinge rod, and the other end of the movable arm is hinged to the hinge arm. A damper is installed inside the pull arm. One end of the damper is fixed to a first guide rod, and an inner guide is formed through the end face of the pull arm. The first guide rod is connected across the inner guide groove. The mounting frame has an outer mounting hole through its end face, and the first guide rod is connected to the outer mounting hole. The upper end of the pull arm has an inner mounting hole, in which a second guide rod is installed. The upper end of the mounting frame has an outer guide groove, through which the second guide rod passes and connects to the inner mounting hole. A tension spring is also installed inside the mounting frame. One end of the tension spring is connected to the second guide rod, and the other end is connected to the mounting frame through a fixing rod. The tension spring pulls the pull arm and the movable arm to move, generating a closing and resetting force.

[0005] The mounting frame also has a fixing hole through the end face, and the fixing rod passes through the fixing hole and is connected to the tension spring; one end of the tension spring is connected to the column surface of the fixing rod, and the other end is connected to the column surface of the second guide rod. The tension spring generates tension, which pulls the pull arm to slide along the outer guide groove.

[0006] The damper extends with a piston rod, a baffle is provided at one end of the piston rod, and a return spring is fitted on the piston rod. The two ends of the return spring press against the baffle and the damper body respectively, and the return spring generates a thrust to push the piston rod back to its original position.

[0007] The inner guide groove and the outer guide groove are waist-shaped grooves that extend laterally along the mounting frame; the inner guide groove and the outer guide groove are arranged in parallel.

[0008] The movable arm is equipped with a rod, and a slide bar is installed through the end of the rod. One end of the rod is slidably installed in the slide groove of the movable arm via the slide bar; the other end of the rod extends and is inserted into a spring plate protruding inside the mounting frame.

[0009] A locking spring is fitted around the outer periphery of the insertion rod. One end of the locking spring presses against the spring plate, and the other end presses against the insertion rod body.

[0010] A locking wheel is installed on the cylindrical surface of the sliding rod. Correspondingly, a locking groove is provided on the side wall of the hinge arm at the position of the locking wheel. After the door hinge is closed, the locking wheel is engaged in the locking groove, generating a closing locking force.

[0011] The beneficial effects of this utility model are: 1. Simple structure, low manufacturing cost, and improved market competitiveness.

[0012] 2. The damper and the return spring work together to buffer the impact force brought by the closing of the door, effectively slow down the closing speed of the door, avoid collisions, protect the door and the cabinet from damage, and extend the service life of the product.

[0013] 3. The coordinated operation of the damper and the return spring effectively reduces noise caused by closing the door, improves the user experience, and enhances the comfort of the electric oven.

[0014] 4. The coordinated action of the insertion rod and the locking spring locks the door in place, ensuring a secure lock, preventing heat leakage, and improving the thermal efficiency of the equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the open state of the door hinge in this utility model.

[0016] Figure 2 This is a schematic diagram of the closed state of the door hinge in this utility model.

[0017] Figure 3This is a schematic diagram of the internal structure of the door hinge in the closed state of this utility model.

[0018] Figure 4 This is an exploded view of the mounting frame, pull arm, and drive arm in this utility model.

[0019] Figure 5 This is an exploded view of the structure of the pull arm, movable arm and damper in this utility model.

[0020] Figure 6 This is a schematic diagram of the mounting frame in this utility model.

[0021] Figure 7 This is a schematic diagram of the damper 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 electrical box door hinge with a buffer function includes a mounting frame 1 connected to the door body, and a hinge arm 2 hinged to the lower end of the mounting frame 1, wherein the hinge arm 2 is connected to the box body.

[0023] The mounting frame 1 is equipped with a pull arm 3 and a movable arm 4. The pull arm 3 is slidably connected to the upper end of the mounting frame 1. One end of the movable arm 4 is connected to the pull arm 3 through a hinge rod 5, and the other end of the movable arm 4 is hinged to the hinge arm 2. A damper 6 is installed inside the pull arm 3. One end of the damper 6 is fixed to the first guide rod 7. An inner guide groove 71 is opened through the end face of the pull arm 3. The first guide rod 7 is connected across the inner guide groove 71. An outer mounting hole 72 is opened through the end face of the mounting frame 1. The first guide rod 7 is connected to the outer mounting hole 72. The upper end of the pull arm 3 is provided with an inner mounting hole 81, in which a second guide rod 8 is installed. The upper end of the mounting frame 1 is provided with an outer guide groove 82, through which the second guide rod 8 passes and connects to the inner mounting hole 81. A tension spring 9 is also installed inside the mounting frame 1. One end of the tension spring 9 is connected to the second guide rod 8, and the other end is connected to the mounting frame 1 through the fixing rod 92. The tension spring 9 pulls the pull arm 3 and the movable arm 4 to move, generating a door closing and resetting force.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown: In the hinge structure of an electric oven door, a mounting frame is provided to connect with the door body, and a hinge arm is provided to connect with the oven body. The hinge arm is hinged to the lower end of the mounting frame. A pull arm and a movable arm are installed in the mounting frame, wherein one end of the movable arm is hinged to the pull arm, and the other end of the movable arm is hinged to the hinge arm.

[0025] One end of the tension spring is connected to the mounting frame via a fixed rod, and the other end is connected to the second guide rod mounted on the upper end of the pull arm. It should be noted that an inner mounting hole is provided at the upper end of the pull arm, while an outer guide groove is provided at the upper end of the mounting frame. The second guide rod is inserted across the outer guide groove and the inner mounting hole. Therefore, the end of the tension spring connected to the fixed rod is the fixed end, and the end of the tension spring connected to the second guide rod is the movable end. The tension spring pulls the pull arm upwards continuously, which in turn drives the movable arm to move. The tension spring generates a certain closing and restoring force to ensure the automatic closing of the door.

[0026] A damper is installed inside the pull arm, with one end fixed to the first guide rod. It should be noted that an inner guide groove is formed on the end face of the pull arm, and an outer mounting hole is formed through the end face of the mounting frame. The first guide rod is inserted across and connected to the inner guide groove and the outer mounting hole. During door closing, the damper generates resistance to the movable arm and pull arm, preventing the door from closing too quickly and causing a violent impact, reducing collisions between the door and the housing, protecting components from damage, and extending the service life of the door hinge.

[0027] The mounting frame 1 also has a fixing hole 91 through the end face. The fixing rod 92 passes through the fixing hole 91 and is connected to the tension spring 9. One end of the tension spring 9 is connected to the cylindrical surface of the fixing rod 92, and the other end is connected to the cylindrical surface of the second guide rod 8. The tension spring 9 generates tension, which pulls the pull arm 3 to slide along the outer guide groove 82.

[0028] like Figure 4 , Figure 5 As shown: A fixing hole is provided through the end face of the mounting frame. A fixing rod passes through the fixing hole and connects to one end of the tension spring, while the other end of the tension spring is connected to the second guide rod. The end of the tension spring connected to the fixing rod serves as the fixed end, and the end of the tension spring connected to the second guide rod serves as the movable end. The tension spring generates tension, pulling the pull arm upward along the outer guide groove. This ensures that the door has sufficient closing and restoring force during the closing process, guaranteeing a smooth door closure, avoiding impacts caused by closing, enhancing the impact resistance and durability of the door hinge, and improving the user experience.

[0029] The damper 6 extends with a piston rod 61, and a baffle 62 is provided at one end of the piston rod 61. A return spring 63 is fitted on the piston rod 61. The two ends of the return spring 63 press against the baffle 62 and the damper 6 body respectively, and the return spring 63 generates a thrust to push the piston rod 61 back to its original position.

[0030] like Figure 4 , Figure 5 , Figure 7As shown: A baffle is installed at the end of the piston rod of the damper, and a return spring is sleeved and connected to the outside of the piston rod. One end of the return spring presses against the damper body, and the other end presses against the end face of the baffle. The return spring generates a certain thrust, which pushes the piston rod to return to its original position, so that the speed of the door when closing is effectively controlled, avoiding the impact between the door and the housing, and ensuring that the door hinge can close slowly and smoothly.

[0031] The inner guide groove 71 and the outer guide groove 82 are waist-shaped grooves that extend laterally along the mounting frame 1; the inner guide groove 71 and the outer guide groove 82 are arranged in parallel.

[0032] The inner and outer guide grooves are designed as waist-shaped grooves extending laterally along the mounting frame, and the two guide grooves are arranged in parallel. This effectively guides the sliding path of the pull arm and damper, ensuring that the two components move along the preset trajectory. This guarantees the stability and reliability of the door hinge during opening and closing, and coordinates with each other to prevent the door hinge from jamming or closing too quickly. Furthermore, the waist-shaped groove design reduces friction during sliding, reducing wear between them.

[0033] The movable arm 4 is equipped with a rod 10, and a slide bar 11 is installed through the end of the rod 10. One end of the rod 10 is slidably installed in the slide groove 41 of the movable arm 4 via the slide bar 11; the other end of the rod 10 extends and is movably inserted into the spring plate 12 protruding inside the mounting frame 1.

[0034] A locking spring 13 is fitted around the outer periphery of the insertion rod 10. One end of the locking spring 13 presses against the spring plate 12, and the other end presses against the body of the insertion rod 10.

[0035] A locking wheel 14 is installed on the cylindrical surface of the slide rod 11. Correspondingly, a locking groove 21 is provided on the side wall of the hinge arm 2 at the position of the locking wheel 14. After the door hinge is closed, the locking wheel 14 is engaged in the locking groove 21, generating a closing locking force.

[0036] like Figure 4 , Figure 5 As shown: To lock the door closed, a plug rod is installed inside the movable arm, and a locking spring is fitted around the outer periphery of the plug rod. One end of the locking spring presses against a spring plate protruding from the mounting frame, and the other end presses against the plug rod body. Since the plug rod can be movably connected to the spring plate, during the closing process of the door, the elastic potential energy of the locking spring compressed due to the opening of the door is released, and the slide rod slides along the slide groove. Under the push of the locking spring, the plug rod is always pushed towards the hinge arm end, and the locking wheel on the slide rod column surface slides into the locking groove of the hinge arm, providing a reliable latching lock for the closing of the door, ensuring that the door is firmly locked in the closed state. Furthermore, the user can smoothly open the door, facilitating the user's control of the door.

[0037] In summary, this door hinge structure incorporates a pull arm and a movable arm that work together. A tension spring is connected to one end of the pull arm, generating tension that pulls the pull arm upward along the outer guide groove. This ensures sufficient closing and restoring force during the door's closure process, guaranteeing a smooth closing and preventing impacts caused by closing the door. This enhances the hinge's impact resistance and durability, improving the user experience.

[0038] Secondly, a damper is installed inside the pull arm, and a return spring is fitted around the piston rod of the damper. One end of the return spring presses against the damper body, and the other end presses against the end face of the baffle. The return spring generates a certain thrust, which pushes the piston rod to return to its original position, so that the speed of the door when closing is effectively controlled, avoiding the impact between the door and the box, and ensuring that the door hinge can close slowly and smoothly.

[0039] To lock the door closed, a locking rod is installed inside the movable arm, with a locking spring fitted around its outer circumference. One end of the locking spring presses against a spring plate protruding from the mounting frame, while the other end presses against the locking rod itself. During the closing process, the elastic potential energy of the locking spring, which was compressed due to the door opening, is released. Under the push of the locking spring, the locking rod continuously advances towards the hinge arm end, and the locking wheel slides into the locking groove of the hinge arm, providing a reliable latching lock for closing the door. This helps maintain the airtightness of the cabinet door and improves the thermal efficiency of the equipment, thus allowing for widespread use.

[0040] 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. A door hinge for an electrical box with a buffer function, comprising a mounting frame (1) connected to the door body, and a hinge arm (2) hinged to the lower end of the mounting frame (1), wherein the hinge arm (2) is connected to the box body, characterized in that: The mounting frame (1) is equipped with a pull arm (3) and a movable arm (4). The pull arm (3) is slidably connected to the upper end of the mounting frame (1). One end of the movable arm (4) is connected to the pull arm (3) through a hinge rod (5), and the other end of the movable arm (4) is hinged to the hinge arm (2). A damper (6) is installed inside the pull arm (3). One end of the damper (6) is fixed on the first guide rod (7). An inner guide groove (71) is opened through the end face of the pull arm (3). The first guide rod (7) is connected across the inner guide groove (71). An outer mounting hole (72) is opened through the end face of the mounting frame (1). The first guide rod (7) is connected to the outer mounting hole (72). The upper end of the pull arm (3) is provided with an inner mounting hole (81), and a second guide rod (8) is installed in the inner mounting hole (81). The upper end of the mounting frame (1) is provided with an outer guide groove (82), and the second guide rod (8) passes through the outer guide groove (82) and connects to the inner mounting hole (81). A tension spring (9) is also installed inside the mounting frame (1). One end of the tension spring (9) is connected to the second guide rod (8), and the other end is connected to the mounting frame (1) through the fixing rod (92). The tension spring (9) pulls the pull arm (3) and the movable arm (4) to move, generating a door closing and resetting force.

2. The door hinge with buffer function for an electrical box according to claim 1, characterized in that: The mounting frame (1) also has a fixing hole (91) through the end face. The fixing rod (92) passes through the fixing hole (91) and is connected to the tension spring (9). One end of the tension spring (9) is connected to the cylindrical surface of the fixing rod (92), and the other end is connected to the cylindrical surface of the second guide rod (8). The tension spring (9) generates tension and pulls the pull arm (3) to slide along the outer guide groove (82).

3. The door hinge with buffer function for an electrical box according to claim 1, characterized in that: The damper (6) extends with a piston rod (61), a baffle (62) is provided at one end of the piston rod (61), and a return spring (63) is fitted on the piston rod (61). The two ends of the return spring (63) press against the baffle (62) and the damper (6) body respectively, and the return spring (63) generates a thrust to push the piston rod (61) back to its original position.

4. The door hinge with buffer function for an electrical box according to claim 1, characterized in that: The inner guide groove (71) and the outer guide groove (82) are waist-shaped grooves that extend laterally along the mounting frame (1); the inner guide groove (71) and the outer guide groove (82) are arranged in parallel.

5. The door hinge with buffer function for an electrical box according to claim 1, characterized in that: The movable arm (4) is equipped with a plug rod (10), and a slide rod (11) is installed through the end of the plug rod (10). One end of the plug rod (10) is slidably installed in the slide groove (41) of the movable arm (4) through the slide rod (11); the other end of the plug rod (10) extends and is inserted into the spring plate (12) that is protruding in the mounting frame (1).

6. The door hinge with buffer function for an electrical box according to claim 5, characterized in that: A locking spring (13) is fitted around the outer periphery of the insertion rod (10). One end of the locking spring (13) presses against the spring plate (12), and the other end presses against the body of the insertion rod (10).

7. The door hinge with buffer function for an electrical box according to claim 5, characterized in that: A locking wheel (14) is installed on the cylindrical surface of the slide rod (11). Correspondingly, a locking groove (21) is provided on the side wall of the hinge arm (2) at the position of the locking wheel (14). After the door hinge is closed, the locking wheel (14) is engaged in the locking groove (21) to generate a closing locking force.

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