KR200319122Y1 - door hinge with fixed cam - Google Patents

Abstract

The present invention relates to a door hinge that is easy to assemble and to enable the smooth opening and closing of the door or to stop the door in a certain section, the fixing cam 10 is fixed integrally to the hinge arm (3) of the main body; An exercise cam 20 which is slidably installed in the hinge shoulder 2 of the door and is capable of reciprocating left and right by interacting with the fixed cam 10 when being rotated together with the door; A main torque spring (4) compressed and extended by the reciprocating motion of the exercise cam (20) to provide rotational torque to the door; A damping spring 5 for attenuating the door at a predetermined position against the main torque spring 4; A rotating rod 40 installed to interact with the exercise cam 20 and rotatable together with the exercise cam 20 in a rotation section of at least a portion of the rotation section of the exercise cam 20; Door hinge, characterized in that it comprises a frictional resistance generating pin (30) for generating a frictional resistance in contact with the rotating rod (40) while being fixed to the hinge arm (3).

Description

Door hinge with fixed cam

The present invention relates to a door hinge that allows the automatic cam rotation and door rotation in a predetermined section by extending or compressing the main torque spring and the damping spring while simultaneously rotating and sliding the motion cam with respect to the fixed cam. More specifically, the present invention relates to a door hinge configured to allow attenuation by frictional resistance in addition to attenuation by a damping spring in a rotational section of a predetermined door.

Conventionally, there has been a door hinge in which the rotating cam and the sliding cam interact with each other, and the main torque spring imparts rotational torque to the door by the interaction.

Such a conventional door hinge has a problem in that the rotating cam, the sliding cam, and the main torque spring are assembled to interact with each other in one housing, and then undergo a complicated assembly process of recombining the door and the main body.

In addition, the conventional door hinge as described above also had a problem that the end impact in the position where the door is fully opened and closed is large and its durability is greatly reduced.

On the other hand, the present applicant has proposed a hinge structure for reducing the end impact of the door by providing a damping spring in itself against the main torque spring as described above.

The conventional hinge structure is applied to a mobile phone or a kimchi refrigerator, etc., and has a very advantageous effect in reducing the impact of the end of the door, while the opening and closing aspect of the rotating section is standardized, and thus it is not suitable for use in the hinge structure of various doors. .

In particular, the conventional hinge structure has a problem that it is impossible to keep the door or cover at a fixed point almost at a stationary state.

In response, the present inventors have developed a new and improved door hinge that is easy to assemble and enables smooth attenuation of the door and more opening and closing of the door.

Accordingly, the present invention, which is devised to overcome the problems of the prior art, enables easier assembly by integrating or fixing the fixed cam to the main body and installing the movement cam to rotate together with the door, and furthermore, the damping spring. It is an object of the present invention to provide a door hinge capable of smoother opening and closing and opening and closing of a variety of doors by causing attenuation by frictional resistance in addition to the attenuation by

1 is a perspective view showing a door hinge according to an embodiment of the present invention.

Figure 2 is an exploded perspective view of the door hinge of Figure 1;

3A is a cross-sectional view taken along the line I-I of FIG. 1, showing a door hinge in the closed position of the door.

3B is a cross-sectional view of the FIG. 1 door hinge taken along II-II of FIG. 3A.

4A and 4B are cross-sectional views of the FIG. 1 door hinge showing when the door is in a resistance start position, and FIG. 4B is a cross-sectional view taken along II-II of FIG. 4A.

5A and 5B are cross-sectional views illustrating the door hinge of FIG. 1 when the door is in the switching position, and FIG. 5B is a cross-sectional view taken along II-II of FIG. 5A.

6A and 6B are cross-sectional views of the door hinge of FIG. 1 when the door is in a coexisting position where damping springs and attenuation by frictional resistance coexist, and FIG. 6B is a cross-sectional view taken along II-II of FIG. 6A.

7A and 7B are sectional views showing the door hinge of FIG. 1 when the door is in the open position, and FIG. 6B is a sectional view taken along II-II of FIG. 6A.

8 is a view schematically showing a state in which the door is moved from the closed position to the open position.

9 and 10 are diagrams according to another embodiment of the present invention.

In order to achieve the above object, the present invention, the fixed cam is integrally fixed to the hinge arm of the main body; An exercise cam slidably installed in a hinge shoulder of the door, the exercise cam being capable of reciprocating left and right by interacting with the fixed cam when rotated with the door; A main torque spring extended or compressed by the reciprocating motion of the motion cam to provide a rotational torque to the door; A damping spring for attenuating the door at a predetermined position against the main torque spring; A rotating rod installed to interact with the exercise cam and rotatable with the exercise cam in at least one portion of the rotation section of the exercise cam; And a frictional resistance generating pin fixed to the hinge arm to generate frictional resistance in contact with the rotating rod.

In addition, the friction deflection generating pin has a tapered ring-shaped hollow portion that is open toward one side, and the tapered core rod extends integrally formed at the center of the ring-shaped hollow portion, and the rotary rod And a tapered surface that contacts with the hollow surface of the tapered hollow portion to generate frictional resistance, and another hollow surface that contacts with the outer peripheral surface of the tapered core rod to generate frictional resistance.

In addition, the rotation annular bar is provided with a spring interposition hole, the spring interposition hole is provided with a pressing spring for pressing the rotary rod with a constant force toward the friction resistance generating pin,

The pressure spring is preferably interposed between the inner wall of the mandrel spring interlocking hole extending from the fixed cam penetrating the motion cam.

In addition, it is preferable that the fluid resistance generating oil is interposed between the rotating rod and the frictional resistance generating pin to generate frictional resistance.

In addition, the exercise cam is made of a hollow structure having a concave formed groove formed on the inner side of the hollow, the rotating rod is provided on its outer peripheral surface with a engaging piece formed to interact with one side wall of the step groove While the exercise cam is rotated together with the rotation of the door, in at least a portion of the rotation angle section of the exercise cam, one side wall of the step groove is engaged with the engaging piece to interact with the movement at a predetermined angle section. It is preferable that the rotation of the cam and the rotating rod occur together.

In addition, when the door is opened and closed, it is assembled so that there is no interaction between the step grooves of the exercise cam and the engaging piece of the rotary rod during the predetermined angle section, during the predetermined angle section when opening and closing the door, the exercise cam is It is preferable to idle.

In addition, the hollow surface of the tapered hollow portion is preferably made of a fluorine or urethane-based rubber material.

Referring now to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

1 is a perspective view showing a door hinge according to the present embodiment, FIG. 2 is an exploded perspective view of the door hinge of FIG. 1, FIG. 3A is a cross-sectional view taken along FIG. II of FIG. 1, and FIG. 3B is a П- of FIG. 3A. A cross section taken along П.

Hereinafter, in the specification, the terms "left" and "right" indicating the orientation do not limit the present invention, and are terms used with reference to FIGS. 1 and 2.

1 to 3B, the door hinge 1 according to the present embodiment includes a hinge shoulder 2 and a hinge arm 3, and in this embodiment, the hinge arm 3 is integral with the main body. It is a part which the hinge shoulder 2 is integrated with a door, and rotates with respect to a main body with a door.

In addition, the door hinge 1 includes a fixed cam 10, the exercise cam 20, the main torque spring (4) and the damping spring (5).

In this embodiment, the fixed cam 10 has its own outer circumferential surface, and is inserted into the hinge hole 3a on the left side of the hinge arm 3 having a corresponding shape, thereby being fixed integrally. Of course, 10) may be integrally formed on the hinge arm 3 and kept fixed to the hinge arm 3.

In addition, the fixed cam 10 is integrally provided with a camp profile 12 having two apex portions and a valley portion in the form of a continuous cam curve at one end of the right side.

In addition, the fixed cam 10 has a ring-shaped hollow portion 14 and a core rod 16 provided at the center of the hollow portion 14 integrally, and the ring-shaped hollow portion 14 has a camp profile ( It extends to the left side from the formation part of 12) and has comprised the ring-shaped hollow structure as a whole, The said core rod 16 is provided in the center part of the hollow part 14, and is extended to the right side long.

In this embodiment, the exercise cam 20 is rotatably inserted in the hinge shaft hole (2a) of the hinge shoulder 2 other camp profile (corresponding to the camp profile 12 of the fixed cam 10) 22 is integrally provided, and when the door is rotated, the door rotates with the rotation of the door and interacts with the camp profile 12 of the fixed cam 10 so as to move left and right along the inside of the hinge shaft hole 2a. Reciprocating at the same time as the rotational movement).

The exercise cam 20 also has a cylindrical hollow portion 24 which is made of a hollow structure as a whole to allow the reception of the rotating rod 40 to be described below.

Then, the motion cam 20 is provided with a projection 26 of a ring-shaped cross section extending to the left side so as to be loosely inserted into the ring-shaped hollow portion 14 of the fixed cam 10, and the projection 26 is The central rod 16 of the stationary cam 10 has a straight communication path 26a formed to allow the core rod 16 to pass through the hollow portion 24 of the exercise cam 20.

Here, it can be clearly seen from Figure 3a that one spring is inserted and maintained in the ring-shaped hollow portion 14 of the fixed cam 10, which spring is the inner wall and the motion cam of the ring-shaped hollow portion 14 It is a damping spring 5 against the main torque spring 4 to be described below, interposed between the ends of the ring-shaped protrusion 26 of 20.

On the other hand, a frictional resistance generating pin 30 is fixed to the right hinge hole 3b of the hinge arm 3, the frictional resistance generating pin 30 is part of the right hinge hole (3b) of the hinge arm (3) ), And the remaining left part is preferably held in the hinge shaft hole 2a.

The frictional resistance generating pin 30 has a support end 31 supporting the main torque spring 4 together with the right end of the exercise cam 20. The support end 31 and the exercise cam 20 Between the right end of the main torque spring (4) for imparting a rotational torque to the door is interposed.

Therefore, when the door is rotated with respect to the main body, the exercise cam 20 integrally held in the hinge shaft hole 2a of the hinge shower 2 rotates with the rotation of the door and at the same time the fixed cam 10 described above. ) Is reciprocated to the left and right, and the main torque spring (4) and damping spring (5) are opposed to each other in accordance with the left and right reciprocating motion of the motion cam 20, and the door is extended for each rotation section It opens and closes with different rotational torques.

The opening and closing pattern of such a door will be described in more detail below.

On the other hand, the friction deflection generating pin 30 has another ring-shaped hollow portion 32 which is open toward the left side, and in the center of the ring-shaped hollow portion 32, a tapered tapered core 33 is integrally formed. It is formed and extends.

At this time, it can be clearly seen from FIG. 3A that the ring-shaped hollow portion 32 of the frictional resistance generating pin 30 also has a tapered hollow surface 32a as a whole.

In addition, the door hinge 1 of the present embodiment also includes a rotary rod 40 having a tapered hollow 41 to allow loose insertion of the tapered core rod 33, which is rotated on its own periphery. The tapered surface 42 is provided to loosely contact the hollow surface 32a of the ring-shaped hollow portion 32 of the frictional resistance generating pin. At this time, the tapered surface 42 of the rotating rod 40 has a shape corresponding to the tapered hollow surface 32a of the ring-shaped hollow portion 32 can be clearly understood through Figure 3a.

The rotary rod 40 has a spring interposed hole 43 on its left side with its tapered surface 42 held in the hollow of the ring-shaped hollow portion 32, and the rotary rod 40 is always on the right side. A pressurizing spring 44 to pressurize is installed inside the spring interposition hole 43.

The pressure spring 44 installed inside the spring interposition hole 43 is disposed between the core rod 16 of the fixed cam 10 extending to the spring interposition hole 43 and the inner wall 43a of the spring interposition hole 43. It is preferably interposed.

Therefore, the pressure spring 44 is present in the state to always press the rotary ring 40 to the right in the spring interposition hole 43.

At this time, since the pressure spring 44 always presses the rotating round bar 40 toward the frictional resistance generating pin 30, the tapered surface 42 of the rotating round bar 40 is connected to the frictional resistance generating pin 30. The hollow surface which makes it possible to contact the hollow surface 32a in an appropriate state, and the outer peripheral surface 33a of the tapered core rod 33 of the frictional resistance generating pin 30 is provided in the hollow part 41 of the rotating ring 40. It is possible to make contact with the state appropriate to (41a).

In addition, by the replacement of the pressure spring 44, the degree of contact can be controlled, which is very preferably used for the adjustment of the frictional resistance which will be described in detail below.

Referring now to FIG. 3B, taken along the П-П of FIG. 3A, in the cylindrical hollow portion 24 of the above-mentioned exercise cam 20, one stepping groove 24a is concavely partitioned at a predetermined angle. It can be seen that.

In addition, the rotating rod 40 is integrally provided with a locking piece 45 which is loosely inserted into the cylindrical hollow portion 24 of the exercise cam 20 and is held inside the engaging groove 24a.

Therefore, when the door is rotated with respect to the main body, the exercise cam 20 rotates with the rotation of the door, and the rotation of the exercise cam 20 is such that one side wall of the engaging groove 24a is connected to the engaging piece 45. It is hooked so that the rotating rod 40 integral with the locking piece 45 is rotated.

As a result, the rotating rod 40 has its tapered surface 42 in contact with the hollow surface 32a of the ring-shaped hollow portion 32 of the frictional resistance pin 30 to generate frictional resistance. The hollow surface 41a of the hollow portion 41 is in surface contact with the outer circumferential surface of the tapered core rod 33 to generate frictional resistance.

In addition, between the tapered surface 42 of the rotating rod 40 and the hollow surface 32a of the frictional resistance generating pin 30, and the hollow surface of the tapered hollow portion 41 of the rotating rod 40. Between 41a and the outer circumferential surface of the tapered core rod 33 of the frictional resistance generating pin 30, a fluid resistance generating oil such as grease oil is interposed to allow the door to be smoothly opened and closed while generating frictional resistance.

Now, with reference to FIGS. 3A to 8, the operation of the present door hinge 1 will be described.

4A and 7B are views showing how the door is closed, that is, the door hinge 1 exhibits opening and closing characteristics from the position shown in FIGS. 3A and 3B and is involved in opening and closing the door.

In addition, FIG. 8 is a view schematically showing a product in which the present door hinge 1 is assembled, and is a schematic view illustrating the operation of the present door hinge together with FIGS. 3A to 7B.

In FIG. 8, the closing position P1 of the door D, the resistance generating start position P2 at which the frictional resistance is generated by the interaction of the motion cam 20 and the rotating rod 30, and the main torque spring 5 are shown. The maximum compressed switching position P3, the coexistence position P4 in which the damping by the damping spring and the damping spring are present together, and the open position P5 in which the door D is completely opened are indicated.

When the door D of FIG. 8 is in the closed position P1, the door hinge 1 is located on its first reference line TSR as shown in FIG. 3A, and its main torque spring 4 is located thereon. The main torque spring 4 and the corresponding damping spring 5 are in an initial compressed state.

In addition, in the closed position (P1) of the door, as shown in Figure 3b, the exercise cam 20 is stationary and the stepping grooves 24a of the exercise cam 20 are placed on the corresponding rotating rod 40. It does not work either.

Then, when the door of FIG. 8 is rotated by the angle section θ1 from the closed position P1 to the resistance generation start position P2, as shown in FIGS. 3A and 4A, the main torque spring 4 By the interaction of the fixed cam 10 and the exercise cam 20 is more compressed, the damping spring (5) is correspondingly extended.

3B, 4B, and 8, while the door is rotated from the closed position P1 to the resistance generation start position P2, the exercise cam 20 does not affect the rotating rod 40. In this state, no friction occurs due to the interaction of any of the motion cams 20 and the rotating rod 40 in the angular section θ1.

Therefore, when the door D is opened, no frictional resistance is generated in this angular section θ1, so that the door is easier to open than other sections below, making it possible to open the door with lighter force. .

Then, when the door of FIG. 8 is rotated from the resistance generation start position P2 to the switching position P3, as shown in FIGS. 4A and 5A, the main torque spring 4 is fixed cam 10. And compression by the interaction of the exercise cam 20, the damping spring 5 is correspondingly released to be located on the second reference line (DSR).

In addition, referring to Figures 4b, 5b and 8, the one side wall of the step groove 24a of the exercise cam 20 and the engaging piece 45 of the rotary ring 40 in the resistance generating position (P2) interaction The rotating cam 40 rotates as the movement cam 20 rotates together with the door, and the rotating rod 40 is rotated in such a manner that its tapered surface 42 and the hollow surface 41a generate frictional resistance. It can be seen that the frictional resistance, preferably fluid resistance by grease oil, is generated by interacting with the hollow surface 32a of the tapered hollow portion 32 of the fin 30 and the outer circumferential surface 33a of the tapered core rod 33, respectively. have.

Then, when the door D of Fig. 8 is rotated from the switching position P3 to the coexistence position P4, as shown in Figs. 5A and 6A, the main torque spring 4 is released and damped. The spring 5 is correspondingly slightly compressed against the stretching force of its main torque spring 4.

5B, 6B, and 8, the rotating rod 40 continues to rotate while interacting with the exercise cam 20, and thus, the attenuation caused by the frictional resistance is generated within this rotating section. There is a section θ3 where the damping by the damping spring 5 takes place at the same time.

Thereafter, when the door D is rotated to the open position P5 past the coexistence position P4, as shown in Figs. 6A and 7A, the main torque spring 4 is more decompressed. The first reference line TSR of FIG. 3A is located again in the closed position P5, and the initial state is obtained. Accordingly, the damping spring 5 also returns to the initial state.

Also, in this section, as shown in FIGS. 6B and 7B, the interaction between the rotating rod 40 and the exercise cam 20 still continues, so that the above-mentioned damping spring is opened while the door D is fully opened. In addition to the attenuation function together with (5), in the open position P5 in which the door D is completely opened, when the door is opened again, the locking piece 45 of the rotating rod 40 is moved for a predetermined period. The step grooves 24a of the cam 20 do not interact with each other, so that the door D does not have to consume much force to open.

As a result, the door hinge 1 has an angular section θ1 where frictional resistance is not generated and frictional resistance is generated while the door D is rotated from the closed position P1 to the open position P5. The angle section θ2 has an angular section θ2. In particular, the angular section θ2 where the frictional resistance is generated includes the angular section θ3 where the attenuation caused by the frictional resistance and the damping spring simultaneously exist (FIG. 8). Reference).

Hereinafter, with reference to Figures 9 and 10, another embodiment of the present invention will be described. In the present embodiment, the same member number is used for the member having the same function as the previous embodiment, and the description already described in the foregoing embodiment will be omitted to avoid duplication.

9 and 10, it can be seen that the hollow surface 32a of the frictional resistance pin 30 according to the present embodiment is formed by a tapered hollow rod 321 made of fluorine or urethane series reinforced rubber.

The hollow surface 32a formed by the tapered hollow bar 321 interacts with the outer circumferential surface of the rotating rod 40 as in the previous embodiment. At this time, since the hollow surface 32a is made of fluorine or urethane-based reinforced rubber, it can be preferably used for a large door structure in which a large opening and closing torque is generated.

At this time, between the hollow surface 32a and the tapered surface 42 of the rotary ring 40, oil for generating fluid resistance such as grease is interposed similarly to the previous embodiment.

As described above, the present invention is not only easy to assemble the door hinge, but also enables smooth opening and closing and opening and closing of various doors, and in particular, it can be used for more various purposes by allowing the door to be stopped without an external force during a certain rotation period of the door. Has the effect.

Claims (7)

A fixed cam 10 fixedly fixed to the hinge arm 3 of the main body; An exercise cam 20 which is slidably installed in the hinge shoulder 2 of the door and is capable of reciprocating left and right by interacting with the fixed cam 10 when being rotated together with the door; A main torque spring (4) compressed and extended by the reciprocating motion of the exercise cam (20) to provide rotational torque to the door; A damping spring 5 for attenuating the door at a predetermined position against the main torque spring 4; A rotating rod 40 installed to interact with the exercise cam 20 and rotatable together with the exercise cam 20 in a rotation section of at least a portion of the rotation section of the exercise cam 20; Door hinge, characterized in that it comprises a frictional resistance generating pin (30) for generating a frictional resistance in contact with the rotating rod (40) while being fixed to the hinge arm (3). According to claim 1, wherein the friction generating pin 30 is provided with a tapered ring-shaped hollow portion 32 which is open toward one side, At the center of the ring-shaped hollow portion 32 is a tapered tapered core rod 33 is formed integrally extending, The rotating rod 40 is in contact with the tapered surface 42 to generate frictional resistance by contacting the hollow surface 32a of the tapered hollow portion 32 and the outer peripheral surface of the tapered core rod 33 to provide frictional resistance. A door hinge comprising a different hollow surface 41a for generating. The method of claim 2, A spring interposer 43 is provided in the rotary round bar 40, and the spring interposed hole 43 presses the rotary round bar 40 with a predetermined force toward the frictional resistance generating pin 30 at a predetermined force. ) Is installed, The pressure spring 44 is interposed between the core rod 16 extending through the exercise cam 20 from the fixed cam 10 and the inner wall 43a of the spring interposition hole 43. Door hinge. The method of claim 3, wherein Door rotation, characterized in that the fluid resistance generating oil is interposed in the portion where the friction resistance is generated by the contact between the rotating rod 40 and the frictional resistance generating pin (30). The method of claim 4, wherein The exercise cam 20 is made of a hollow structure provided with a recessed step groove 24a formed on the inner side of the hollow, The rotating rod 40 has a locking piece 45 formed on its outer circumferential surface to interact with one side wall of the step groove 24a, While the exercise cam 20 is rotated together with the rotation of the door, at least part of the rotation angle section of the exercise cam 20, one side wall of the step groove 24a is the locking piece 45 The door hinge, characterized in that the rotation of the rotary cam 40 and the movement cam 20 occurs in a predetermined angle to interact with the interaction. The method of claim 4, wherein When the door is opened and closed, it is assembled so that there is no interaction between the step groove 24a of the exercise cam 20 and the engaging piece 45 of the rotary rod 40 during the predetermined angle section, and the door is opened and closed. During the predetermined angle section, the exercise cam 20, the door hinge, characterized in that idling. The method according to any one of claims 2 to 5, The hollow surface (32a) of the tapered hollow portion 32 is a door hinge, characterized in that made of a fluorine or urethane-based rubber material.