KR100458798B1 - Hinge for door - Google Patents

Abstract

The present invention relates to a hinge for a door that is opened and closed by an up / down rotation opening and closing method, and a hinge using a conventional cam has a problem in that workability and productivity are considerably reduced due to a large number of parts and an assembly process.

Therefore, in the present invention, the front end 131 of the hinge shaft 130 installed in the case body 110 protrudes to the outside through the shaft hole 121 of the cover 120 and the hinge shaft 130 according to the opening and closing of the door 220. In the hinge is rotated, the both ends of the spring plate (140a, 140b) is inserted into the guide groove 112 in the case body 110 to maintain a predetermined interval between the inner wall 111, the spring plate (140a) (140b) in the center of the hinge shaft 130 is installed to install the spring plate 140a by forming a polygonal first, second, third cam contact surface (132, 133, 134) on both sides or one side of the outer peripheral surface portion that is in contact with the spring plate The opening and closing angles of the doors 220 are maintained according to the cam contact surface contacting the ground 140b, and the present invention is composed of only four parts of the case body, the cover, the hinge shaft, and the spring plate. Its small number of parts and good assembly make it effective in improving productivity and is not restricted by installation space. Open and closed position is maintained and kept confidential force of the door of the door has a good effect.

Description

Hinge for door

The present invention relates to a hinge for a door that is opened and closed by an up / down rotation door type, and more particularly, the door hinge is composed of only four parts of a case body, a cover, a hinge shaft, and a leaf spring, and the number of parts is considerably smaller than in the related art. The present invention relates to a hinge for a door, in which the assembly can be easily made to increase productivity, and the opening and closing angle of the door and the airtight force when the door is closed are maintained well.

Generally, doors for electronic appliances such as cupboard doors, kimchi refrigerators and washing machines of kitchen furniture are frequently used with opening / closing doors that open up and down while rotating around the hinge axis. The hinges for the sliding doors are mostly maintained by the coil spring tension when the door is completely opened using the tension of the coil spring installed on the hinge shaft.

However, since the hinge for the opening door is opened or closed only when the door is completely closed or fully open, the opening and closing angle of the door may not be maintained at a desired place, resulting in inconvenience in use, and when the installation space is sufficient, such as a hatchback car. A gas cylinder is used to freely open and close the door.

However, most of the doors for kitchen furniture, doors for electronic appliances such as kimchi refrigerators and washing machines cannot use gas cylinders due to limitations in installation location and appearance problems. Is mainly used, and developed as such a hinge is a "hinge mechanism and hinge unit" registered in the domestic patent No. 227866.

As shown in FIGS. 1A and 1B, the patented hinge includes first and second guide protrusions 14 formed on the outer circumferential surface of the main body and the cover while the cam surfaces 13 are formed to face each other so as to be engaged with each other. Two cam bodies 11 and 12; A pin shaft (20) through which the first and second cam bodies (11, 12) are rotatably inserted through the other end of the key groove (22) in a state where the flange (21) is formed at one end thereof; The second cam body 12 is pressed against the first cam body 11 while being supported by an E-ring 23 coupled to the key groove 22 after being fitted into the pin shaft 20 protruding from the second cam body 12. It is composed of a coil spring (30).

By the way, the hinge is assembled to the first cam body 11, the second cam body 12, the pin shaft 20, the E ring 23, the coil spring 30, etc. in addition to the main body and the cover (not shown in the figure) Due to the large number of parts and the difficult assembly, the assembly process takes a lot of time and time, so productivity is low. As mentioned above, it is monotonous to operate only when the cover is completely closed or fully open.

That is, when the hinge is used on a door that has a large load like the door of a Kimchi refrigerator, the hinge does not distribute the load of the door evenly to the hinge of the cover, so the door may not be balanced and the door feels heavy. In addition, since the cam surface is divided into only the valley portion 15b and the top portion 15a, when the door opening angle exceeds a predetermined angle, the door tends to open completely suddenly, and thus there is a risk of use in a large product such as a kimchi refrigerator. .

In addition, in view of the above, a hinge for applying to a sliding door that loads a lot like a home appliance such as a kimchi refrigerator is registered in Korean Utility Model Registration No. 249985, and the configuration of the utility model registered hinge is As shown in Figs. 2a and 2b.

The hinge is installed between the first and second fixing members 51 and 52 spaced apart from each other so that the hinge shaft 70 is rotatably inserted, and the hinge shaft 70 is movable horizontally to the slider 60. And an elastic spring 80 for supporting the slider 60, a protrusion 62 having a cam curved surface 61 opposed to the outer side of the slider 60, and a hinge formed at the cam curved surface 61. Both ends of the pin 71 penetrating the shaft 70 are in contact with each other, and the slider 60 is fitted to the guide shafts 53 provided on both sides of the hinge shaft 70 to move horizontally. .

However, in addition to the main body and the cover (not shown in the figure), the hinge also includes a slider 60 having a first and second fixing members 51 and 52, a hinge shaft 70, and a cam protrusion 62, and an elastic spring ( 80), the pin 71, the guide shaft 53 is made of more parts, as the assembly productivity is lower than the above-described invention, it can be said that there are many factors of the cost increase.

In addition, since the cam curved surface 61 is divided into the valley portion and the top portion only, the door tends to open completely suddenly when the opening angle of the door exceeds a predetermined angle. When applied to the product, there is a problem causing safety accidents because the risks of use, such as hitting the door against the wall, are always inherent.

In addition, the above-described invention and the invention is a structure in which the shaft, both cams and springs are arranged in a line, so that the overall length of the case cover can be formed to be considerably long, and thus the limitation and appearance of the installation space are not beautiful. There is a problem that the air tightness of the door falls.

The present invention has been developed in order to solve the conventional problems as described above, the present invention is to reduce the number of parts constituting the hinge to a minimum, and to improve the assembly ability to improve the productivity, while the length is short and the volume is small installation space The object of the present invention is to provide a hinge for a door that is not particularly limited by the airtightness of the door.

Figure 1a, 1b is an exploded perspective view showing a conventional hinge structure and a perspective view of the assembled state

Figure 2a, 2b is an exploded perspective view and a perspective view of the assembled state showing another conventional hinge structure

Figure 3 is an exploded perspective view illustrating a hinge in which the present invention is carried out

4 is a perspective view illustrating an example of a state in which the hinge of the present invention is installed in a product;

Figure 5 is a side view showing a state in which the polygon cam contact surface formed on the hinge axis of the present invention

Figures 6a, 6b, 6c is a cross-sectional view of the main portion showing the operating state of the present invention

7 is a side view of another embodiment of the hinge axis of the present invention.

Figures 8a to 8c is a side cross-sectional view showing the operating state of the spring plate and the hinge shaft of another embodiment of the present invention

Explanation of symbols for main parts of the drawings

110: case body 120: cover

121: shaft ball 130: hinge axis

132, 133, 134: first, second, third cam ground

140a, 140b: Spring plate 141: Holder

X, Y: Center line of hinge axis

Hereinafter, described in detail by the accompanying drawings the technical configuration and operation of a preferred embodiment that can effectively achieve the above object of the present invention.

Figure 3 is an exploded perspective view illustrating a hinge of an embodiment of the present invention, Figure 4 is a perspective view illustrating a state in which the hinge of the present invention is installed on both sides of the door as an example, the case of the configuration of the present invention The tip 131 of the hinge shaft 130 installed in the main body 110 protrudes to the outside through the shaft hole 121 of the cover 120, and the tip 131 of the protruding hinge shaft 130 is the door 220. The hinge is inserted into the shaft hole (not shown in the drawing) so that the hinge shaft 130 is rotated as the door 220 is opened and closed.

The configuration feature of the present invention is to fix the both ends of the spring plate (140a, 140b) in the guide groove 112 so that both inner walls 111 and a predetermined distance is maintained inside the case body 110, the spring plate In the center between 140a and 140b, the hinge shaft 130 in which the 1st, 2nd, and 3rd cam contact surfaces 132, 133, 134 are formed on both sides or one side of the outer peripheral surface is rotatably inserted.

That is, FIGS. 3 and 5 illustrate an embodiment in which the first, second and third cam contact surfaces 132, 133, and 134 are formed to face both outer circumferential surfaces of the hinge shaft 130 in the present invention, and include a spring plate 140a ( The opening and closing angle of the door 220 is adjusted according to the cam contact surface position in contact with 140b).

And, as shown in Figure 5 of the first, second, third cam ground surface (132, 133, 134) of the hinge shaft 130, the first cam ground surface 132 is in contact when the door 220 is opened at 90 degrees hinge The third cam ground surface 134 is formed to be parallel to the center line X of the shaft 130, and the contact contact when the door 220 is closed is parallel to the center line (Y) of the hinge shaft 130 It is formed to be inclined to form a predetermined inclination angle (α) based on the characterized in that the airtight force is maintained when the door 220 is closed.

In this case, the second cam ground surface 133 is formed in the corner portion between the first cam ground surface 132 and the third cam ground surface 134, characterized in that formed in one or more polygons.

The spring plates 140a and 140b have one end connected to each other in a "c" shape to maintain spaced intervals from each other, and the other ends separated from each other to maintain tension of the spring plates 140a and 140b. It is preferable to install the insertion into the "c" shaped holder piece 141 in the reverse direction, the reference numeral 210 in the figure is the body of the kimchi refrigerator illustrated as an example of the various products in which the hinge of the present invention is installed.

The present invention formed as described above is composed of only four parts of the case body 110, the cover 120, the hinge shaft 130, the spring plate (140a) 140b in the configuration of the hinge shown in Figures 1a and 2a The number of parts is considerably smaller than that of the conventional hinge, and the hinge plate 130 and the cover 120 are simply assembled by inserting both ends of the spring plates 140a and 140b through the guide grooves 112 of the case body 110. Since the assembly is completed, it can be said that the assembly is quite good.

In the present invention, when the door 220 is opened about 90 degrees after being installed in the product, the hinge shaft 130 of the cam contact surfaces 132, 133, and 134 of the hinge shaft 130 installed in the case body 110 is as shown in FIG. 6A. Both first cam contact surfaces 132 forming a horizontal state with the center line X are in surface contact between both spring plates 140a and 140b.

In this case, since both spring plates 140a and 140b hold and fix the first cam ground surface 132 of the hinge shaft 130 with a strong tension, the door coupled to the front end 131 of the hinge shaft 130. 220 is maintained in a good state even when opened 90 degrees even if you do not hold by hand.

When the door 220 is slowly closed in this state, the first cam ground surface 132 of the hinge shaft 130 is out of both spring plates 140a and 140b as the door 220 is rotated, and the second cam next to the door 220 is rotated. The ground plane 133 is gradually rotated toward both spring plates 140a and 140b.

At this time, both spring plates 140a and 140b are spaced apart from the inner wall 111 of the case body 110, so that the spring plates 140a and 140b are pushed to the edges of the second cam ground surface 133 and opened to the outside, as shown in FIG. When the second cam ground surface 133 is completely contacted, it is retracted and holds the hinge shaft 130 with a strong tension, so that the ground state of the second cam ground surface 133 is maintained as it is, so that the door 220 has a 45 degree angle. Will remain open.

Here, in the present invention, when the second cam ground surface 133 is formed in plural, the opening state of the door 220 may be adjusted at various inclination angles.

In addition, when the door 220 is completely closed in the above state, the hinge shaft 130 rotated along the door 220 may have a second cam ground surface 133 that is out of both spring plates 140a and 140b. The cam contact surface 134 immediately enters between both spring plates 140a and 140b, wherein the third cam contact surface 134 is inclined at a predetermined angle with respect to the center line Y of the hinge shaft 130, and thus the door is closed. The pressing force is applied to the door 220 so that the door 220 is lowered than the surface of the product body 210.

Accordingly, as shown in FIG. 6C, when the door 220 is closed while the third cam ground surface 134 is in surface contact between the spring plates 140a and 140b, the door 220 is far from the hinge shaft 130. The seal member of the edge of the door 220, which is installed for sealing by a strong tension of the leaf spring acting on the tip portion, is more tightly adhered to the product surface, resulting in strong airtightness.

7 and 8a to 8c are other embodiments of the hinge shaft and the spring plate of the present invention, one of the spring plate 140a (140b) of one of the spring plate 140a to form a round recessed portion 142 In the hinge shaft 130, the first, second, and third cam contact surfaces 132, 133, 134 are formed on only one side of the outer circumferential surface to be in contact with the spring plate 140b, and the other parts of the hinge shaft 130 are intact in a cylindrical state. It is made to point-contact at both ends of the recessed part 142 of the board | plate 140a.

At this time, of course, the first cam ground surface 132 is contacted when the door 220 is opened at 90 degrees, so that the first cam ground surface 132 is formed to be parallel to the center line X of the hinge shaft 130, and the door 220 is contacted when the door 220 is closed. The third cam ground surface 134 is formed to be inclined to form a predetermined inclination angle (α) with respect to the line parallel to the center line (Y) of the hinge shaft 130, the airtight force when the door 220 is closed Let it stay

The hinge according to another embodiment of the present invention is the first cam ground surface 132 parallel to the center line (X) of the hinge shaft 130 when the door is opened as shown in Figure 8a and one side of the spring plate (140b) Since the surface is in contact with the state the weight of the door 220 acts in the vertical direction to maintain a good 90-degree open state.

In addition, when the door 220 is gradually closed in the state, as shown in FIG. 8B, the hinge shaft 130 is rotated so that the second cam ground surface 133 is in contact with the spring plate 140b to maintain the door open at 45 degrees. At this time, since both ends of the concave portion 142 in point contact with the hinge shaft 130 and the second cam ground surface 133 are supported by three points, the safety in the holding section is better maintained.

When the door 220 is completely closed, the inclined third cam contact surface 134 is in surface contact with the spring plate 140b as shown in FIG. 8C, and the closed state of the door 220 is well maintained, as well as the door 220. There is a strong air tightness.

The spring plate 140a (140b) of the present invention is a strong tension by simply bending the spring plate to the "c" shape so that one end is connected to each other and then insert the "c" shaped holder piece 141 of the reverse direction to the other end away Since the spring plate (140a, 140b) acts to form a spring plate is very easy to manufacture and can be used as a 360-degree hinge for the product.

As described above, in the present invention, since the number of parts constituting the hinge is composed of only four parts of the case body, the cover, the hinge shaft, and the spring plate, the number of parts is smaller and the assembly is better than in the related art.

In addition, since the length of the hinge can be shortened, the installation space is not restricted, and the door is opened and closed at various angles by the surface contact between the polygon hinge shaft and the leaf spring rotated together along the opening and closing of the door. In particular, when the door is closed, there is an effect of maintaining a good airtight force of the door by the contact action of the spring plate and the inclined third cam ground of the hinge shaft.

Claims (5)

The tip 131 of the hinge shaft 130 installed in the case body 110 protrudes to the outside through the shaft hole 121 of the cover 120, and the tip 131 of the hinge shaft 130 is the door 220. In the hinge is inserted into the shaft hole of the hinge shaft 130 is rotated in accordance with the opening and closing of the door 220, Both ends of the spring plates 140a and 140b are inserted into the guide grooves 112 so as to be spaced apart from both inner walls 111 inside the case body 110 and installed between the spring plates 140a and 140b. In the center, the hinge shaft 130 is installed to be installed, but the cam ground surface position contacting the spring plates 140a and 140b by forming the first, second and third cam ground surfaces 132, 133, and 134 opposed to each other on the outer peripheral surface of the inserted portion. The door hinge according to claim 1, wherein the door 220 is opened and closed. The method of claim 1, One of the spring plates 140a and 140b forms a concave inlet 142 on one side of the spring plate 140a, and first, second, and third cam contact surfaces 132, 133, and 134 are formed on the hinge shaft 130 only on one side of the outer circumferential surface. The hinge for the door, characterized in that the hinge shaft 130 is supported by three points when the opening and closing state of the door 220 is maintained according to the cam ground surface is rotated by. The method according to claim 1 or 2, The first cam ground surface 132 of the first, second, and third cam ground surfaces 132, 133, and 134 of the hinge shaft 130 is formed to be parallel to the center line X of the hinge shaft 130, and the third cam ground. Surface 134 is a hinge for a door, characterized in that formed to be inclined by a predetermined angle (α) with respect to the line parallel to the center line (Y) of the hinge axis 130 to maintain the airtight force of the door. The method of claim 3, The second cam ground surface (133) is a hinge for a door, characterized in that formed in one or more polygons in the corner between the first cam ground surface 132 and the third cam ground surface (134). The method according to claim 1 or 2, One end of the spring plate (140a, 140b) is connected to the end of the "c" shape to maintain the gap, and the other ends separated from each other to maintain the tension is inserted into the "c" shaped holder piece 141 of the reverse direction Door hinge.