CN102121338B - A suction-assisting mechanism for a box door and a refrigerator - Google Patents

Abstract

The invention discloses a door auxiliary absorbing mechanism and a refrigerator. The mechanism comprises a door hinge, wherein the door hinge comprises a cantilever, a mounting part to be fixed on a refrigerator body, a pivot part for pivoting with a door body, and a rolling part arranged on the lower end face of the door body; the mounting part and the pivot part are arranged at two ends of the cantilever; an auxiliary absorbing rail which takes the pivot part as a rotating center and is matched with the rolling part is arranged on the upper end face of the cantilever; the cantilever comprises an inner side corresponding to the inside of the refrigerator body and an outer side corresponding to the outside of the refrigerator body; and the auxiliary absorbing rail comprises a minus grade section extending from the inner side to the outer side of the cantilever, and/or a minus grade section extending from an elevated position between the inner side and the outer side of the cantilever to the outside. The door auxiliary absorbing mechanism and the refrigerator can avoid damage caused by weakened elasticity or ageing of a material, so the reliability of the auxiliary absorbing mechanism is remarkably improved, and the service life is increased.

Description

A suction-assisting mechanism for a box door and a refrigerator

technical field

The invention relates to the field of household appliances, in particular to a suction-assisting mechanism for a box door and a refrigerator.

Background technique

At present, door hinges are mostly used for the connection between the door body and the box body of various household appliances such as refrigerators, so that users can flexibly open and close the door body. The door hinge generally includes a mounting part, a cantilever and a pivoting part. The mounting part is fixed on the box body, the cantilever extends from the mounting part, and the pivoting part is arranged at the free end of the cantilever and is pivotally connected with the door body. In order to prevent the user from applying enough pushing force when closing the door body and causing the door body to fail to close tightly, most home appliances also set up a suction-assisted mechanism between the door body and the door hinge, and the door body is closed to To a certain extent, it will be automatically adsorbed on the cabinet.

A suction-assisting mechanism utilizes the rebound effect of the spring to realize the suction-assisting movement of the door body. However, this mechanism also needs supporting parts for fixing and maintaining the stable work of the spring, such as a housing, which leads to a complex structure of the suction-assisting mechanism and higher cost.

Another suction aid mechanism with a relatively simple structure mainly includes a protruding part arranged on the end cover of the door body and an elastic caliper (claw) arranged on the door hinge. When the door body approaches the box body, the protruding part also rotates with the door body with the pivot part as the rotation axis, and gradually approaches the elastic caliper (claw). When the angle between the door body and the box body is about 15 °～5°, the elastic calipers (claws) are elastically deformed under the push of manpower and give way; when the angle between the door and the box is about 5°, the elastic deformation of the elastic calipers (claws) The maximum critical value is reached; when the door body is further close to the box body and the angle between the two is about 5°~0°, the protrusion moves to the open area at the root of the elastic caliper (claw), and the elastic caliper (claw) It starts to rebound and exerts a reaction force on the protruding part, making it close to the box body by the resultant force towards the box body. At this time, even if the external force applied to the door body by the person is withdrawn, the door body will be in the position of the elastic caliper (claw) part. Under the action of rebound, it will automatically close to the box body, so as to realize the purpose of automatic door closing. However, this suction-assisted mechanism mainly uses the elasticity of the elastic caliper (claw) material itself to achieve rebound. The elastic caliper (claw) is generally made of POM (polyoxymethylene resin/polyoxymethylene resin), and its elasticity will increase with the closing of the door. The number of times increases and gradually weakens, and repeated deformation will cause fatigue cracks or even aging of the material, and it is easy to break and damage. Therefore, the service life of this suction-assisted mechanism is short and its reliability is low.

Contents of the invention

The main technical problem to be solved by the present invention is to provide a door suction-assisted mechanism with improved reliability and a refrigerator.

In order to solve the above technical problems, the present invention provides a suction aid mechanism for a box door, which includes a door hinge, the door hinge includes a cantilever, a mounting part for fixing on the box body, and a pivoting shaft for pivotally connecting with the door body. part, the mounting part and the pivoting part are respectively arranged at both ends of the cantilever, and also include rolling parts arranged on the lower end surface of the door body, and the upper end surface of the cantilever is also provided with the pivoting part as the center of rotation, and The suction-assisted track matched with the rolling parts; the cantilever includes an inner side corresponding to the inside of the box and an outer side corresponding to the outside of the box, and the suction-assisted track includes a downhill section extending from the inner side of the cantilever to the outer side, And/or include a downhill section extending outward from a rise located between the inner side and the outer side of the cantilever.

Further, the suction-assisting track also includes an uphill section extending from the inner side of the cantilever to the elevated position.

Preferably, the uphill section of the suction-assist track gradually narrows from the inner side of the cantilever to the raised place.

In one embodiment, the suction-assisting track is fixed on the upper end surface of the cantilever, or is directly recessed on the upper end surface of the cantilever.

Preferably, a wear-resistant layer is added to the surface of the suction-aiding track for matching with the rolling parts.

Preferably, the angle range of the arc corresponding to the downhill section of the suction-assist track is 10°-40°.

In one embodiment, the rolling part includes a door hinge bushing and balls for rolling along the suction-assistance track, the door hinge bushing is fixed on the lower end surface of the door body, and one end of the hinge bushing is pivoted with the pivoting part. connected, the other end is provided with a ball hole, the ball is assembled in the ball hole and the bottom is exposed below the door hinge bushing.

Preferably, the lower end surface of the door body is also provided with a ball nest, the ball hole is a through hole with a diameter smaller than the diameter of the ball, the upper hemisphere of the ball is embedded in the ball nest, and the lower hemisphere passes through the ball hole.

The invention also protects a refrigerator, which includes a box body and a door body, and also includes the above-mentioned box door suction-assisting mechanism.

Preferably, the door is a refrigerator door.

The beneficial effects of the present invention are: the suction aid mechanism of the box door and the refrigerator of the present invention use the suction aid track arranged on the door hinge in combination with the gravity action of the door body itself to realize the suction aid function of the door body, which is different from that in the prior art using materials Compared with the method of realizing the suction aid of the door body by its own elastic effect, it can avoid the damage phenomenon caused by the weakening of the material elasticity or aging, so the reliability of the suction aid mechanism is significantly improved, and the service life is increased.

In addition, after the suction aiding mechanism of the box door of the present invention is provided with the suction aiding track and the rolling parts, the force points of the door body on the door hinge during the rotation process are dispersed in the two positions of the pivoting part and the cantilever, effectively avoiding the independence of the pivoting part. Bearing the weight of the door body and the kinetic energy of the rotating shaft, it is easy to cause damage. Therefore, the door hinge has a stronger bearing capacity and higher stability, which can further meet the needs of users.

Description of drawings

Fig. 1 is the left side view of the refrigerator of an embodiment of the present invention;

Figure 2 is an enlarged schematic view of position A in Figure 1;

Fig. 3 is the sectional view of B-B direction in Fig. 2;

Fig. 4 is an exploded schematic diagram of the door body of the refrigerator in the first viewing angle according to an embodiment of the present invention;

Figure 5 is an enlarged schematic view of position C in Figure 4;

Fig. 6 is an exploded schematic diagram of the door body of a refrigerator in a second viewing angle according to an embodiment of the present invention;

Figure 7 is an enlarged schematic view of the position D in Figure 6;

Fig. 8 is a schematic diagram of a suction-assisted guide rail according to an embodiment of the present invention;

Fig. 9 is an exploded schematic diagram of the door body of a refrigerator in a third viewing angle according to an embodiment of the present invention;

FIG. 10 is an enlarged schematic diagram of position E in FIG. 9 .

Detailed ways

The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

Please refer to Fig. 1 to Fig. 4, the door suction mechanism of this embodiment is used in a refrigerator, the refrigerator includes a box body 8 and a door body, for a refrigerator with only one door body, the door suction mechanism can be directly installed on the door Below the body, for the refrigerator with the refrigerator door body 6 and the freezer chamber door body 7 shown in Figure 1, the door body can be set as the refrigerator door body 6, that is, the door suction-assisted mechanism can be arranged under the refrigerator door body 6 , the top of the freezer door body 7, of course, according to specific needs, the door body can also be set as the freezer door body 7.

The box door suction aid mechanism in this embodiment includes a door hinge and a rolling part 5 , wherein the door hinge includes a mounting part 1 , a cantilever 2 and a pivoting part 3 . The installation part 1 is fixed on the box body 8, such as shown in Figure 9 and Figure 10, the installation part 1 can be screwed and fixed on the box body 8 with screws, so that the installation surface 11 of the installation part 1 is close to the box body 8 and the door The corresponding side of the body; the pivot part 3 includes a pivot 31, which can be embedded in a pivot hole or a bushing on the door body to pivotally connect with the door body, so that the entire door body can be driven by manpower to rotate around the pivot shaft 31 to realize the door. The flexible opening and closing of the body; the cantilever 2 extends from the mounting part 1, so that the mounting part 1 and the pivoting part 3 are respectively arranged at both ends of the cantilever 2. The rolling part 5 is arranged on the lower end surface of the door body, and may include rollers, guide rollers, balls 52 and other parts that can roll along the predetermined track. For the refrigerator door 6, the bottom has a lower end cover 61, and the lower end surface of the door body is the lower end cover 61. the lower surface.

The cantilever 2 has a certain width, including an inner side corresponding to the inside of the box body 8 and an outer side corresponding to the outside of the box body 8, and the outer side can be located at the edge of the side of the refrigerator. The upper end surface of the cantilever 2 is also provided with a suction-assisting track 4, which takes the pivot 31 of the pivot part 3 as the center of rotation, and can cooperate with the rollers or balls 52 in the rolling member 5 to provide a rolling track. When the user closes the door, the ball 52 or the roller first enters the suction-assisting track 4 from the inner side of the cantilever 2, and when the door rotates and closes along the pivot 3, the ball 52 or the roller moves along the suction-assisting track 4 until it moves When reaching the outside of the cantilever 2, the door body is completely closed. In order to realize the suction function of the door body, as shown in Figures 6 to 8, the suction track 4 includes a downhill section 41 that gradually slopes down in the horizontal direction, and the downhill section 41 extends from the inside of the cantilever 2 to the outside. And/or extending outward from the raised place 43 between the inner side and the outer side of the cantilever 2, when the door body is closed, after the ball 52 enters the downhill section 41 of the suction-assisted track 4, since it bears the gravity of the door body, the Gravity and the oblique supporting force of the downhill section 41 form a resultant force to drive the rolling part 5 to drive the door body to move down along the downhill section 41 automatically. Automatically move to the lowest end of the downhill section 41 until it is attached to the box body 8 . On the contrary, during the opening process of the door body, the door body is driven by manpower to rotate around the pivot part 3, and the ball 52 or the roller rolls in the suction-assisted track 4 along the direction opposite to that when the door body is closed and gradually rises until the door body Break away from the suction-assisted track 4 when opening to a certain angle.

The box door suction-assisted mechanism of this embodiment uses the suction-assisted track arranged on the door hinge combined with the gravity of the door itself to realize the suction-assisted function of the door body. Compared with the suction method, it can avoid the damage phenomenon caused by the weakening of the material elasticity or aging, so the reliability of the suction aid mechanism is significantly improved, and the service life is increased.

In addition, in the door hinges currently used to connect refrigerator doors, the installation part 1 is usually installed on the upper, middle and lower beams of the refrigerator, wherein the middle beam bears the weight of the refrigerator door body and the pivoting function of the refrigerator door. The lower end cover 61 of the door body of the refrigerator compartment is provided with a shaft hole and a shaft sleeve, which can cooperate with the pivoting part 3 to undertake the pivoting and supporting functions of the door body. This structure makes the pivoting part 3 of the door hinge not only to constrain In addition to the four degrees of freedom of front, rear, left, and right on the horizontal plane of the door body, it also bears the self-weight of the refrigerator door body, so it is easy to damage. Specifically, almost all the weight of the refrigerating door body 6 of the refrigerator is pressed against the pivoting part 3, and the moment carried by the pivoting part 3 is analyzed. When the weight of the door is about 5-10 kg and the length of the cantilever 2 is about 30-50 mm , the static dynamic moment of the pivoting part 3 reaches 1.5-5NM. In view of its narrow mounting base, the resistance arm from the screw to the edge of the mounting part is generally only 5mm, so the corresponding static tension acting on the center beam is amplified to 300-1000N , in the drop test environment, if the pivoting part 3 is subjected to an external force with a collision acceleration of 10G, the corresponding dynamic instantaneous force peak value can reach 3000-10000N, which may cause the door hinge to be brittle or skewed, and then cause serious quality problems. After the box door suction aid mechanism of the present embodiment is provided with the suction aid track 4 and the rolling part 5, the force points of the door body on the door hinge during the rotation process are dispersed in the two positions of the pivot portion 3 and the cantilever 2, effectively avoiding the The pivoting part 3 independently bears the weight of the door body and the kinetic energy of the rotating shaft and is prone to damage. Therefore, the door hinge has a stronger bearing capacity and higher stability, which can further meet the needs of users.

Since there may be a certain positional deviation between the door body and the box body 8 during assembly and use, in order to make the rolling parts 5 cooperate with the suction-assisting track 4 smoothly, the suction-assisting track 4 in this embodiment also includes a direction from the inside of the cantilever 2 to The uphill section 42 extending from the raised part 43, when the door body is closed to a certain angle, the ball 52 first enters the suction track 4 from the bottom or middle part of the uphill section 42 and is gradually lifted up to the raised place under the action of manpower. 43, and then the ball 52 can automatically move downward along the downhill section 41 to realize the suction of the door body. This structure can adapt to the assembly error between the door body and the box body 8 in the vertical direction, and facilitates the ball 52 or roller to enter the suction-assisted track 4 smoothly. At the same time, in order to adapt to the horizontal assembly between the door body and the box body Error, the uphill section 42 of the suction-assisting track 4 can also be set to gradually narrow from the inner side of the cantilever 2 to the raised part 43, which further facilitates the ball 52 to enter the suction-assisting guide rail 4.

The position, arc length, and inclination of the suction-assisting track 4 and the downhill section 41 can be set according to specific needs, for example, the elevation 43 located in the middle of the suction-assisting track 4 is higher than the lowest end of the suction-assisting track 4 located on the outside of the cantilever 2 0.1-2mm, that is, during the closing process, the door body first rises to a certain height along the uphill section 42, and then descends 0.1-2mm along the downhill section 41 to close the door. The angle range corresponding to the arc of the uphill section 42 of the suction track 4 can be 3° to 10°, and the angle range of the downhill section 41 corresponding to the arc can be 10° to 40° so that the suction aid mechanism has a greater assisting effect. Suction angle, for example, when the angle range of the uphill section 41 corresponding to the arc is 5°, and the angle range of the downhill section 41 corresponding to the arc is 30°, the door body will form about 35° with the box body 8 during the closing process. When the angle is included, the ball 52 enters the suction-assisting track 4 through the upslope 42, and as the suction-assisting track 4 rises, the door body first rises by 0.1-2mm to reach the elevated position 43, and then the door body is closed to the space between the box body 8 When an included angle of about 30° is formed, the ball moves downward along the downslope 41 until the entire door is automatically close to the casing 8, so that the suction angle is increased to 30° or even greater. Further, in order to prevent the lowest end of the suction-assist track 4 located outside the cantilever 2 from protruding from the outside of the box and being easily damaged or affecting the appearance, the outer side of the cantilever 2 can also be provided with a boss that seals the lowest end of the suction-assist track 4 .

The suction-assisting track 4 of this embodiment can be fixed on the upper end surface of the cantilever 2 , for example, by using sheet metal material, or the suction-assisting track 4 can be integrally formed with the cantilever 2 , that is, directly recessed on the upper end surface of the cantilever 2 . In order to effectively protect the suction track 4 and rolling parts and avoid material damage, a wear-resistant layer can also be added on the surface of the suction track 4 to match the rolling parts 5. The wear-resistant layer can be made of POM and other materials. For example, it can be fixed on the upper surface of the suction-assisting track 4 by bonding, buckling or riveting.

In one embodiment shown in Figures 4 to 5, the rolling part 5 includes a door hinge bushing 51 and a ball 52, the door hinge bushing 51 is fixed on the lower end surface of the door body by screws, and a sleeve is provided at one end of the sleeve. Covered on the pivot 31 so as to be pivotally connected with the pivot 3, so that the entire rolling part 5 can rotate around the pivot 31 together with the door body. The other end of the door hinge sleeve 51 is provided with a ball hole 511, and the ball 52 is assembled in the ball hole. 511 and expose the bottom below the door hinge bushing 51, the bottom of the ball 52 can be in contact with the suction-assisting guide rail 4 and roll along the suction-assisting guide rail 4. There are many ways to assemble the ball 52. For example, the upper hemisphere of the ball 52 can be embedded inside the rolling part 5 so that it is not easy to fall out. In between, that is, the lower end surface of the door body is also provided with an upwardly recessed ball nest 612, whose shape and size match the ball 52, the ball hole 511 is a through hole with a diameter smaller than the diameter of the ball 52, and the through hole in the door hinge bushing 51 The thickness of the location is smaller than the radius of the ball 52 , the upper hemisphere of the ball 52 is embedded in the ball socket 612 , the lower hemisphere passes through the ball hole 511 and exposes the bottom of the door hinge bushing 51 . In this installation method, the ball 52 is embedded in the ball nest 612 on the lower end surface of the door body, so that the ball 52 is not easy to fall out and rolls smoothly.

Considering that there may be frictional resistance between the ball 52 and the suction-assisting guide rail 4 that may affect the feel of use, the arc radius of the suction-assisting guide rail 4 can be set within 50 mm, and the user’s point of force to open the door is about 500 mm away from the door hinge, so the ball 52 and The slight frictional force between the suction-assist guide rails 4 is hardly noticed by people. Certainly, the gap between the ball 52 and the door hinge bushing 51 and the lower end surface of the door body can also be filled with a small amount of vaseline or butter for lubrication.

The box door suction-assisted mechanism of the present invention can be widely used in various household appliances such as refrigerators, microwave ovens, ovens, etc., and can also be used in various appliances with doors such as various furniture, office supplies, electrical equipment, and public facilities. It is easy to use, Good stability and long service life.

The above content is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (10)

1. A box door suction aid mechanism, including a door hinge, the door hinge includes a cantilever (2), a mounting part (1) for fixing on the box body (8), and a hinge for pivoting with the door body The pivoting part (3), the mounting part (1) and the pivoting part (3) are respectively arranged at both ends of the cantilever (2), and it is characterized in that it also includes a rolling part (5) arranged on the lower end surface of the door body ), the upper end surface of the cantilever (2) is also provided with the pivoting part (3) as the rotation center, and the suction-assisting track (4) matched with the rolling part (5); the cantilever (2) Including the inner side corresponding to the inside of the box body (8) and the outer side corresponding to the outside of the box body (8), the suction-assisting track (4) includes a gradually inclined downward in the horizontal direction, from the inside of the cantilever (2) to The downhill section (41) extending outside, and/or including the downhill section (41) extending outward from the raised place (43) between the inside and outside of the cantilever (2); when the door is closed, After the rolling part (5) enters the downhill section (41) of the suction-assisted track (4), it drives the door body to automatically move down along the downhill section (41) to the lowest end of the downhill section (41) until it is in contact with the box body ( 8) Fit. 2. The suction-assisting mechanism for the box door according to claim 1, characterized in that, the suction-assisting track (4) further includes an upward slope extending from the inside of the cantilever (2) to the raised place (43) Paragraph (42). 3. The box door suction-assisted mechanism according to claim 2, characterized in that, the uphill section (42) of the suction-assisted track (4) goes from the inside of the cantilever (2) to the raised place (43 ) gradually narrows. 4. The suction aid mechanism for the box door according to claim 1, characterized in that, the suction aid track (4) is fixed on the upper end surface of the cantilever (2), or is directly recessed on the cantilever (2) of the upper end. 5. The suction-assisting mechanism for the box door according to claim 4, characterized in that, a wear-resistant layer is added on the surface of the suction-assisting track (4) for cooperating with the rolling parts (5). 6. The box door suction aid mechanism according to any one of claims 1 to 5, characterized in that the angle range of the arc corresponding to the downhill section (41) of the suction aid track (4) is 10° ~40°. 7. The box door suction aid mechanism according to any one of claims 1 to 5, characterized in that, the rolling member (5) includes a hinge bushing (51) and is used to move along the suction track (4) ) rolling ball (52), the hinge bushing (51) is fixed on the lower end surface of the door body, one end of which is pivotally connected with the pivoting part (3), and the other end is provided with a ball hole (511), the ball (52) is assembled in the ball hole (511) and the bottom is exposed under the hinge bushing (51). 8. The suction aid mechanism for the box door according to claim 7, characterized in that, the lower end surface of the door body is further provided with a ball nest (612), and the ball hole (511) has a diameter smaller than that of the ball (52). The upper hemisphere of the ball (52) is embedded in the ball socket (612), and the lower hemisphere passes through the ball hole (511). 9. A refrigerator, comprising a box body (8) and a door body, characterized in that it further comprises the box door suction-assisting mechanism according to any one of claims 1-8. 10. The refrigerator according to claim 9, characterized in that, the door is a refrigerator door (6).

Images