RU2511490C1 - Mechanism of hinged latch - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: as an operational force a natural phenomenon is used - atmospheric pressure. The main structural component of the mechanism - a body reacting to atmospheric pressure - is a geometric shape - a box, square in cross section. The body is manufactured by compression from an airtight elastic resilient material and has four solid faces, four elastic ribs, and instead the two end faces - two elastic dome. The body is sealed, and when negative pressure is created, acts as a pivot of four sections, being deformed by force of atmospheric pressure into a rhomboid parallelepiped with a sharp angle of 45°. In the mid-points of four faces of the parallelepiped - shaped body there are stops formed that when bound up in pairs can increase the degree of vacuum and atmospheric pressure, the force of impact, without compromising the angle of the rhomb below 45°. The mechanism is attached by one face to the side wall of the furniture, and by an adjacent face - to the door of the furniture.

EFFECT: reliable and efficient work of a hinged latch and ability to hold the door in a closed and open position with a lock effect.

5 dwg

Description

The invention relates to mechanisms for fixing furniture doors and other doors in closed and open positions. There are many different mechanisms that act as a hinge-lock for furniture doors (cabinets, sideboards, cabinets, etc.).

These mechanisms contain many details of complex design and high complexity (springs, levers, cams, etc.), but they do not fix the position of the doors clearly and reliably.

The aim of this invention is to provide a door hinge mechanism that is simple in design, technologically advanced in production and provides reliable and accurate operation.

Among the existing mechanisms of the hinge-clamps analogues of the mechanism proposed by this invention is not available.

The goal is achieved through two factors:

1. A natural phenomenon is used as the acting force - atmospheric pressure, which is everywhere and always.

2. The main structural element of the mechanism - the body that responds to atmospheric pressure, is the geometric shape of the box with the introduction of the following features:

a) four parallel faces in cross section form a square,

b) the ribs act as hinges,

c) two end faces are replaced by elastic domes,

d) all parts of the box are made of an airtight material (e.g. rubber).

Thanks to these features, the box can act as a four-link articulated (see II Artobolevsky "Theory of mechanisms and machines" Moscow. Publishing house. Science. 1988).

The box is a sealed enclosure that allows you to create a certain vacuum in it. When creating a vacuum, the casing under the influence of atmospheric pressure is deformed from square to rhomboid and directly, without any details, performs the work of the door hinge-lock in the closed and open positions.

The design of the sealed housing of the parallelepiped, which is essentially the proposed mechanism, is presented in figure 1 in a non-working static state, figure 2 - in the working state of the rhomboid parallelepiped.

Four parallel faces 1 are links of the hinge mechanism, ribs 2 are hinges, two end faces are replaced by domes 3, a rubber valve 4 for pumping and pumping air is installed in one face, similar to that used in soccer and volleyballs. At the midpoints of the four faces, stops 5 are formed. At one of the faces, a handle 6 is formed for switching the mechanism.

The sealed parallelepiped housing is made by pressing from an elastic, airtight elastic material (for example, rubber) with vulcanization of the feedstock.

Vulcanization provides the required properties: for all parts - heat resistance and cold resistance; for four faces and stops - hardness, for ribs and end domes - elasticity and resilience.

By pressing, an opening for valve 4 is formed.

The mechanism is illustrated by the diagrams of figure 3, in which it is presented in the form of a hinged four link. The designations on the diagrams correspond to the designations of structural elements in figures 1, 2, namely: 1 - four links (faces), 2 - four hinges (ribs), 6 - shift knob.

In the diagram of FIG. 3a, the mechanism is shown in a static, inoperative state: its cross section is square, the internal volume V _{1 is} proportional to the square area S ₁ . The mechanism is in a state of stable equilibrium, because both outside and inside it is atmospheric pressure.

To bring the mechanism into working condition, it is necessary to pump out part of the air through valve 4. In this case, a dual process occurs in the mechanism (parallelepiped).

a) A certain vacuum is created, and under the influence of atmospheric pressure, the mechanism is deformed from square to rhomboid, the end domes are pulled inward, lengthening in the direction of the large diagonal of the rhombus, and do not impede the parallelepiped deformation (see Fig.2 and the diagram of Fig.3b).

b) The rhomboid shape has a volume less than square, the density of the air inside increases and at any stop of pumping the air there is a balance between atmospheric pressure and the air pressure inside, and the deformation of the mechanism stops.

The air is pumped out until the sharp angle of the rhombus becomes equal to 45 °. At this moment, the cross-sectional area of the parallelepiped is S ₂ = S ₁ × sin45 °. Since sin45 ° = 0.707, then V ₁ = V ₁ × 0.707, i.e. volume V ₂ decreased rounded by 0.3 relative to the volume inoperative.

In this position, when the acute angle of the rhombus reaches 45 °, and the stops 5 formed in it, indicated by the letters a-b and d-c (see fig. 2b), are closed in pairs, the mechanism works as a hinge-lock, fixing the door in a closed position (see figure 4).

To switch the mechanism from this extreme position to another extreme position corresponding to the open door, an external force F must be applied to the handle 6 (for example, the strength of a person’s hand, see FIG. 3c).

The force F at the first moment overcomes the initial force of atmospheric pressure, which arose earlier during the pumping of air and deformation of the parallelepiped into a rhomboid, which reduced its volume by 0.3.

Therefore, the initial atmospheric pressure force acting on the verge of the mechanism is 0.3 of the total atmospheric pressure of 1.033 kg / cm ² , i.e. rounded equal to 0.3 kg / cm ² .

After overcoming this pressure under the action of force F, the mechanism rotates counterclockwise, while the volume of the parallelepiped and the degree of vacuum inside it increase, which causes an increase in the atmospheric pressure acting on it. At the moment when the shape of the parallelepiped becomes square, its volume increases by 0.3 (as indicated above), the degree of vacuum inside also increases by 0.3, and the effect of atmospheric pressure becomes maximum (see the diagram of Fig. 3d). At this moment, the position of the parallelepiped is unstable, therefore, it jumps into the second position of stable equilibrium, making a stepwise rotation counterclockwise by 90 ° (see the diagram of fig.3d).

Thus, due to changes in the volume of the parallelepiped at the moments of switching the mechanism, atmospheric pressure acts on it like a spring.

In the second equilibrium position, when the acute angle of the rhombus also reaches 45 ° and the stops 5 formed in it, denoted by the letters a-d and b-c, are closed in pairs (see the diagram of Fig.2c), the mechanism also works as a hinge-lock, locking the door in the open position.

The fastening of the hinge-lock in the piece of furniture (cabinet) is shown in Figs. 4 and 5, which show the cabinet view from above with the conditionally removed cover. Before fixing, the hinge-lock is in a non-working static state (see figa). After pumping out part of the air through valve 4, the hinge-clamp is deformed by atmospheric pressure into a rhomboid parallelepiped with a diamond angle of 45 ° (see 4 and 2b).

In this position (the door 12 is not fixed at the same time), the hinge-latch is fixed to the side wall of the cabinet 7 by means of a transition block 8 and plates 9, 10 with screws 11 (see Fig. 5). After that, the hinge-lock is transferred by the handle 6 (Fig.2) to another extreme position (see Fig.2c) and is attached to the cabinet door 12 via the plate 13 with screws 11 (see Fig.5).

Opening and closing the cabinet door is done by the handle 14, to which the efforts of the human hands F1, F2 are applied, overcoming the atmospheric pressure acting on the verge of the hinge-latch. At the same time, the doors make a stepwise rotation of 90 °.

The stops 5 in the mechanism of the hinge-clamp (see figure 2) make it possible to increase the degree of vacuum by additional pumping of air, and hence the effect on the mechanism of atmospheric pressure, preventing the angle of the rhomboid parallelepiped from decreasing below 45 °.

Due to this, it is possible to establish such a degree of vacuum and the force of atmospheric pressure that the hinge-lock will keep the door in a closed position with the effect of a lock.

Figure 1.

The door hinge-lock mechanism is a square box in a static idle position.

Figure 2.

The design of the door hinge-lock is a parallelepiped in a non-working static position and in two working positions.

Figure 3.

Schemes of the hinged four-link explaining the operation of the door hinge-lock mechanism.

Figure 4. Top view of the cabinet, explaining the method of fastening the hinge-lock (cabinet door is closed).

Figure 5. Top view of the cabinet explaining how to fix the hinge-lock (cabinet door is open).

Claims (1)

The mechanism of the door hinge, characterized in that atmospheric pressure is used as the acting force, which acts on the sealed enclosure - a square parallelepiped made of airtight material, with four solid faces, four elastic elastic ribs, two end elastic domes and four formed at the midpoints of the faces with stops, due to which the sealed housing acts as a hinged four-link when pumping air out of it and creating a vacuum in it nnik, which is deformed by atmospheric pressure into a rhomboid parallelepiped with an acute angle of 45 ° and is fixed with one face to the side wall of the furniture, and the side adjacent to it - to the furniture door, using a transition block and plates, which provides the mechanism with the role of a door hinge-lock in a closed and open positions, while the pairwise locking stops make it possible to set by pumping a higher degree of vacuum and the force of atmospheric pressure and thus keep the door in a closed position with the effect of a lock.

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