KR200300865Y1 - A multi-cam hinge - Google Patents

Abstract

The present invention relates to a multiple cam hinge for preventing a safety accident due to the automatic closing of the door by reducing the impact caused by the automatic closing of the door and ensuring safety while also opening and closing the door smoothly. The present invention for realizing this, the housing 40 is fixed to the container body (2) is accommodated so that the main body side cam member is prevented from rotating; A door side cam member (10) in which the cam portion having a plurality of sawtooth shapes and a cam face (12) on the surface is placed in the housing (10) and the fixed shaft (13) is fixed to the door (3); A main body side cam member 20 which is received to slide in the housing 40 and is linearly moved by the rotational movement of the door side cam member 10 and has a cam surface corresponding to the cam surface of the door side cam member 10; ; A pressing member (30) for elastically pressing the main body side cam member (20) so as to be in surface contact with the door side cam member (10); A housing cover 50 for preventing the door side cam member 10 from being separated, wherein the door side cam member 10, the main body side cam member 20, and the pressing member 30 are associated with each other. When the door 3 is opened in an area of 10 to 85 °, the door stops at the opening angle, and when the door 3 rotates in the closing direction, it is closed by the weight of the door in the area of -5 to 10 °. In the cam friction surface of the door-side cam member 10 and the main body-side cam member 20 is provided with a plurality of lubricant filling grooves (15, 25).

Description

Multi Cam Hinges {A MULTI-CAM HINGE}

The present invention relates to a hinge, in particular, the closing area due to the weight of the door is less than the opening angle of 10 ° to reduce the impact caused by the automatic closing of the door to prevent safety accidents by the automatic closing of the door and to ensure safety The present invention relates to a multiple cam hinge for smoothly opening and closing the door by lubricating the cam friction surface.

Since the opening of the opening is located on the upper surface of the kimchi refrigerator and the like, the door is opened to the upright position to draw out the stored goods. There is a need for a hinge for door opening and closing to maintain a stable stop state at an angle.

In accordance with such a request, the present applicant has a cam for stably opening / closing and rotating the door according to Application No. 20-2001-0034143 (Registration No. 20-0265445) and Application No. 20-2002-0004915 (Registration No. 20-0275858). It has been proposed a cam hinge configured to include a member.

As shown in FIG. 1, the cam hinge 100 registered by the present applicant has a hinge housing 140 installed in the hinge portion of the container body and a cam portion inside the housing, and one side of the cam hinge 100 is disposed on the door. The door-side cam member 110 is fixed and rotates, and corresponds to the door-side cam member 110, and is supported by the pressing member 130 and rotated by the door-side cam member 110 in a non-rotable state. It consists of the main body side cam member 120 which makes linear slide motion.

The cam hinge 100 registered by the applicant of the present application is a multi-shape in the shape of the teeth of the cam has a spiral surface so that the closed and open state of the door is kept stable under the pressing force of the spring.

However, the prior application registration technology has a problem that the door is closed by the weight in the region of the opening angle of 20 ° or less by the configuration of the cam surface and the spring has a problem.

In other words, if the door closes strongly and momentarily with its own weight loaded in a position having a 20 ° inclination, the main body will be shocked.In this case, the user may be injured if a body part such as a finger is caught between the door and the main body due to user's carelessness. There was a risk of being a safety accident.

In addition, the prior art has a problem that the opening and closing operation of the door is not smooth because the lubricant is pushed out and depleted in the friction surface during long-term use.

In order to solve the above problems,

The object of the present invention is that the door side and the main body side cam member and the pressure member by the self-weight of the door is composed of the closing angle of 10 ° or less by reducing the impact of the automatic closing of the door by the user of the automatic door closing In addition to preventing safety accidents that damage the body and ensuring safety, the user can be protected, while a lubricating filler groove is provided on the helical friction surface of the cam to keep lubricant on the friction surface. It is to provide a multiple cam hinge to make a smooth.

1 is a cross-sectional view of the applicant's prior application technology

Figure 2 is a cross-sectional exploded view showing the configuration of an embodiment according to the present invention

3 is an assembled cross-sectional view of FIG.

4 is a side view of FIG. 3

5 is a perspective view of the door-side cam member of FIG.

6 is a cam operating state of an embodiment according to the present invention

7 is a mounting state of the present invention

8 is a right side view of FIG.

9 is a graph showing the relationship between the hinge torque and the spring constant according to the present invention

* Explanation of symbols for the main parts of the drawings

1: multiple cam hinge of the present invention 2: container body

3: door 10: door side cam member

12: cam face 13: fixed shaft

15: Lubricant Filling Groove 17: Stopper

20: main body side cam member 22: cam surface

25: lubricant filling groove 30: pressure member (spring)

40: housing 59: housing cover

51: stopper groove 60: bush

Multiple cam hinge according to the present invention to achieve the above object,

A housing fixed to the container body and accommodated so that the main body side cam member is prevented from rotating;

A door side cam member having a plurality of teeth in the housing and having a cam portion having a planar cam surface, and having a fixed shaft fixed to the door;

A main body side cam member accommodated to slide in the main body housing and linearly moved by a rotational movement of the door side cam member and having a cam surface corresponding to the cam surface of the door side cam member;

A pressing member for elastically pressing the main body side cam member to be in surface contact with the door side cam member;

And a housing cover for preventing the door side cam member from being separated.

When the door side cam member, the main body side cam member, and the pressure member are combined to open the door in the range of 10 to 85 °, the door stops at the opening angle, and the door rotates in the closing direction. Characterized in that it is configured to close by the weight of the door in the region.

As an embodiment according to the present invention,

Each of the spiral cam surfaces of the door side cam member and the main body side cam member is provided with a plurality of lubricant filling grooves.

As an embodiment according to the present invention,

The door side cam member has a stopper protruding from both sides of the contact portion with the housing cover, and the housing cover is provided with a stopper groove for limiting rotation of the door side cam member to a predetermined angle region.

Hereinafter, an embodiment of a multiple cam hinge of the present invention will be described in more detail with reference to the accompanying drawings.

2 is a partially exploded cross-sectional view showing the configuration of a multiple cam hinge of an embodiment according to the present invention, Figure 3 is an assembled cross-sectional view of Figure 2, Figure 4 is a left side view of FIG.

As shown in Figures 2 and 4, the multiple cam hinge 1 of one embodiment according to the present invention,

A housing 40 which is fixed to the container body 2 and in which the main body side cam member is accommodated to prevent rotation, and a cam portion having a plurality of tooth shapes in the housing 10 and having a planar cam surface 12 is placed therein The door side cam member 10 fixed to the door 3 is accommodated so as to slide in the housing 40 and is linearly moved by the rotational movement of the door side cam member 10. Body side cam member 20 having a cam surface corresponding to the cam surface of 10), the pressing member 30 for elastically pressurizing such that the body side cam member 20 is in surface contact with the door side cam member 10, It is configured to include a housing cover 50 for preventing the separation of the door side cam member 10,

When the door side cam member 10, the main body side cam member 20 and the pressure member 30 are combined to open the door 3 to the area A of 10 to 85 °, the door stops at the opening angle thereof. The state is maintained, and the door 3 is configured to be closed by the weight of the door in the -5 to 10 ° region B when the door 3 is rotated in the closing direction.

Figure 5 is a perspective view of the door side cam member 10 of the embodiment according to the present invention, Figure 6 is a cam operation view showing the operation line of the door side cam member 10 and the main body side cam member 20 As shown in FIG. 7, a fully open state (a degree), a closed state (b degree), and a half open state (c degree) are illustrated, and FIG. 7 is an embodiment in which a cam hinge according to the present invention is mounted. The side view which shows the opening-and-closing state of the door 3 by which the door 3 is rotated up and down to the container main body 2 in which the storage chamber was formed, FIG. 8 is a right side view of FIG.

As shown in FIGS. 5 to 8, the door-side cam member 10 having a sawtooth shape is fixed integrally with the door 3 to rotate in accordance with opening and closing of the door. 20 is accommodated so that rotation is prevented by the housing 40 to perform a linear slide movement and the elasticity of the pressing member 30 during this linear movement.

In the open state of the door, as shown in Fig. 6 a of the cam is made stable engagement, and when closed, as shown in Fig. B the main body cam member 20 slides the door side cam member 10 Are connected to each other at the front end, and the door is connected to the cam member serrated spiral surface as shown in FIG.

The torque value according to the rotation of the door hinge is calculated as 'distance (l) x door weight between the hinge point and the center of gravity of the door'.

9 is a graph showing the relationship between the torque value of the door and the spring constant of the pressing member 30 according to the present invention to maintain the stop state when opening the door at a predetermined angle.

Looking at the relationship between the door opening and closing angle and the torque value according to the above calculation criteria, as shown by the curve a of FIG. 9, the torque value of the horizontal state that is completely closed to the container body 2, that is, the torque value of 0 ° state In the case of 100, the torque value at the opening of 30 ° is 60, the torque value at the opening of 60 ° is close to 30, 90 °, and the torque value at the fully open state becomes 0, and the smaller the opening angle of the door is, the smaller the torque value is. Will grow.

In order to keep the stationary state in which the door 3 is opened on a predetermined angle stably, that is, to suppress the rotation of the door in an obliquely open state, the value of the spring constant of the pressing member 30 is higher than the torque value on the angle. This greatly formed condition must be satisfied.

The rotation range of the door-side cam member is designed in the range of-5 to 85 ± 5 ° and as indicated by the b curve of FIG. 9, the spring constant is hinged at the opening angle of the door in the region (A) of 10 to 85 ± 5 °. It is larger than the torque value of, and in the region B below 10 °, the spring constant of the pressing member is formed smaller than the torque value of the hinge. In calculating the spring constant, the friction coefficient of the cam member, the torque reduction effect of the lubricant, and the like are taken into account.

With such a configuration, the door opening state is stably supported by the pressing member 30 in the region A of 10 to 85 ± 5 degrees A starting from the opening angle of 10 degrees, and in the region B of 10 degrees or less. It is automatically closed by the weight of the door.

Therefore, the drop impact due to the automatic closing is significantly reduced compared to the prior art to ensure the safety. On the other hand, by allowing the rotation range of the door to be rotated to -5 degrees to close the door close.

The saw-tooth cam is formed by dividing the circumference of the cam member into a plurality, spreading the load by spreading the contact surface, and preferably formed in three.

Each of the spiral cam friction surfaces of the door side cam member 10 and the main body side cam member 20 is provided with a plurality of lubricant filling grooves 15 and 25.

Such a configuration prevents the lubricant from being pushed out of the friction surface by the cam operation by filling a lubricating agent such as grease on the spiral surface where the cam friction occurs, and keeps the state containing the lubricant to smoothly operate the door.

As an embodiment according to the present invention, in particular, as shown in Figure 4, the door side cam member 10 is provided with a stopper 17 protruding to both sides of the contact with the housing cover 50, the housing cover ( 50 is provided with a stopper groove 51 for limiting the rotation of the door-side cam member 10 to a predetermined angle region.

Such a configuration limits the rotational operation of the door opening and closing within a predetermined angle range to prevent the door from falling back.

In addition, the bush 60 is preferably provided between the shaft end of the door-side cam member 10 and the spring guide portion 42 of the housing 40. The bush 60 prevents the flow of the shaft during operation of the door side cam member 10, and minimizes abrasion due to the rotational operation.

As described above, the present invention has a closing area of 10 ° or less due to the self-weight of the door, thereby significantly reducing the impact caused by the automatic closing of the door, thereby ensuring safety without injuries caused by the user's carelessness. On the other hand, it is provided with a lubricant filling groove on the cam friction surface to hold the lubricant so that the lubricant is not pushed or exhausted from the friction surface so that the opening and closing operation of the door can be made smoothly even for a long time use.

As described in detail above, the multiple cam hinge according to the present invention,

As the closing area by the weight of the door is less than 10 ° of opening angle, the impact due to the automatic closing of the door is remarkably reduced, thereby preventing safety accidents that may damage the user's body which may be caused by the automatic closing of the door. It is a technology that has the advantage that the door opening and closing operation is made smoothly even during long-term use by being configured to secure the safety to protect the user and to hold the lubricant on the cam friction surface.

Claims (3)

A housing (40) fixed to the container body (2) and accommodated to prevent rotation of the body side cam member; A door side cam member (10) in which the cam portion having a plurality of sawtooth shapes and a cam face (12) on the surface is placed in the housing (10) and the fixed shaft (13) is fixed to the door (3); A main body side cam member 20 which is received to slide in the housing 40 and is linearly moved by the rotational movement of the door side cam member 10 and has a cam surface corresponding to the cam surface of the door side cam member 10; ; A pressing member (30) for elastically pressing the main body side cam member (20) so as to be in surface contact with the door side cam member (10); And a housing cover 50 for preventing the door cam member 10 from being separated. When the door side cam member 10, the main body side cam member 20, and the pressing member 30 are combined to open the door 3 to the 10 to 85 ° region, the door stop state is maintained at the opening angle. , Multiple cam hinge, characterized in that the door (3) is configured to close by the weight of the door in the region of -5 to 10 ° when rotated in the closing direction. The method of claim 1, Each cam friction surface of the door side cam member (10) and the main body side cam member (20) is provided with a plurality of lubricant filling grooves (15, 25). The method of claim 1, The door side cam member 10 protrudes the stopper 17 to both sides of the contact portion with the housing cover 50, The housing cover (50) is a multiple cam hinge, characterized in that the stopper groove (51) for limiting the rotation of the door-side cam member (10) to a predetermined angle area.