RU200282U1 - DEVICE FOR AUTOMATIC RETRACTING OF THE MOVING PART OF THE GUIDE FOR EXTENDING ELEMENT OF FURNITURE - Google Patents

Abstract

The claimed utility model relates to the design of a guide for a pull-out piece of furniture, for example, a drawer, and is designed to bring the pull-out element to the open position and to securely retract and lock in the closed position. The device for automatic retraction of the movable element of the guide for the furniture element includes a housing with a guide rail located inside it, on which a slider connected with an energy accumulator is installed with the possibility of longitudinal and rotational movement. A control system with a toothed wheel, while the slider is connected through a piston rod to a shock absorber, as well as to an energy accumulator connected through a toothed rack to a toothed wheel, the position of which is determined by a lock. The toothed rack is equipped with limiting protrusions, which reciprocally interact with the protrusions of the housing, thereby ensuring the preservation of battery functions in the event of damage to the toothed rack. The technical result is the regulation of the tension force of the energy accumulator and the change in the effort to bring the moving part of the guide to the "open / closed" position. 2 wp f-ly, 5 dwg

Description

The claimed utility model relates to the design of a guide for a pull-out piece of furniture, for example, a drawer, and is designed to bring the pull-out element to the open position and to securely retract and lock in the closed position.

A current problem in the known technical solutions is jamming of the guide for the pull-out furniture element when heavy objects are placed in the pull-out element. This is due, among other things, to a decrease in the elastic properties of the energy accumulator - a spring that stretches without the possibility of reverse compression. As a result, during the operation of the sliding piece of furniture, especially at high loads, when the drawer is moved to the "closed" position due to a decrease in the operational characteristics of the energy accumulator - the springs of the drawer facade may not reach tight mating with the sides of the furniture case and, as a result, between the specified furniture elements form a gap.

The main advantage of the claimed utility model is the ability to regulate the force with which the pull-out element, when moved to the "closed" position, is completely pulled into the furniture box, due to which the front of the pull-out element without a gap reaches full and tight mating with the elements of the said furniture box. In this case, the elastic properties of the energy accumulator are retained for a longer period and, accordingly, its service life is increased.

In addition, in order to bring the pull-out piece of furniture into the open position by mechanical action on the facade of the pull-out piece, significant efforts are required in order to activate the automatic retraction device. Excessive force when driving the pull-out element in the direction of the "closed" position does not allow a silent and smooth closing of the furniture element.

Retractable structures, in which automatic retraction devices are used, are characterized by a high level of reliability, ability to withstand significant loads, durability and ease of use.

From the prior art there is known an automatic retraction device for a movable piece of furniture, guided by an outlet guide, comprising a casing, an energy accumulator mounted on the casing and adapted to tension when the movable element of a piece of furniture is opened, a tension mechanism in functional connection with an energy accumulator and providing tension of the energy accumulator by means of a slider installed with the ability to move on the casing, while the casing has a sliding rail on which the slider can be mounted, and the casing has a rocker guide into which at least one first guide shelf provided on the slider projects , moreover, the casing also has a groove into which a second guide shelf provided on the slider protrudes, and when the slide is in the installed position, the sliding rail is located between the first guide shelf and the second guide shelf, and on the second at least one clamping projection is formed in the guide shelf in the direction of the sliding rail (RF patent No. 2514024 for the invention "Automatic retraction device and outlet guide", filing date 06/17/2010, published 04/27/2014).

Known accelerating device for moving parts of a piece of furniture or household appliance, in particular, drawers or doors, containing a housing, an energy storage device attached to the housing by the first end, at least one gripper located on the housing with the ability to move and made with the possibility of preliminary voltage by means of an energy storage device, a deflection device, which is installed on the housing and by means of which the energy storage device is connected to the gripper, while the deflection device is connected to a mechanical locking device, by means of which it is possible to fix the energy storage device during the voltage process in at least one intermediate position between the minimum stressed position and the maximum stressed position, while the gripper is configured to lock in the first end position, in which the gripper enters the curved end part of the first guide and engages with the carriage, and when When gripping in the first end position, the energy storage device has a maximum voltage (patent No. 2635913 for the invention "Accelerating device for moving parts of a piece of furniture or household appliance", filing date 01.13.2014, publication date of the application 03.03.2017).

The closest technical solution to the claimed utility model is an automatic retractor for a sliding piece of furniture, installed with the ability to move along guide rails and containing a base, an energy accumulator located on the base and turning into a stressed state when the movable element of furniture is opened, and when the movable element is closed furniture, which ensures its retraction into the final closed position due to the accumulated energy, a tension mechanism designed to pre-tension the energy accumulator, moreover, until a certain open position is reached, the specified tension mechanism is connected to the movable furniture element, and after moving beyond the specified open position, the tension mechanism is automatically disconnected from it and in this position it blocks the tensioned energy accumulator, while the tensioning mechanism contains two leashes connected to the energy accumulator and synchronously blocking or activating the tensioning mechanism, and these levers are separately guided by the corresponding rails of the extension guide and are connected to each other by means of a control system with a gear wheel (patent No. 2506872 for the invention "Automatic retractor and guide extension mechanism", application PCT EP 2009/066146, filing date 01.12.2009, date of publication of the application 01.20.2013).

The disadvantages of the known solutions are associated with the low operational characteristics of the automatic retraction device due to the lack of the possibility of adjusting the tension force of the energy accumulator (spring) to give the force to activate / deactivate the sliding furniture element.

The technical result to be achieved by the claimed utility model consists in providing the possibility of regulating the tension force of the energy accumulator and, as a consequence, changing the effort to bring the movable part of the guide for the sliding furniture element to the "open / closed" position.

The specified technical result is achieved in that a device for automatic retraction of a movable element of a guide for a furniture element, including a housing with a guide rail located inside it, on which a slider connected to an energy accumulator is installed with the possibility of longitudinal and rotational movement, as well as a control system with a gear wheel, According to the utility model, the slider is connected through a piston rod to a shock absorber, as well as to an energy accumulator connected through a toothed rack with a toothed wheel, the position of which is determined by a lock, while the toothed rack is equipped with limiting protrusions responsively interacting with the protrusions of the body, thereby ensuring the preservation of functions battery in case of damage to the toothed rack.

The proposed utility model is illustrated by drawings, where:

FIG. 1 is a top view of the device for automatically retracting the movable part of the guide for the pull-out furniture element when the energy accumulator is compressed;

FIG. 2 is a top view of the device for automatically retracting the movable part of the guide for the pull-out furniture element when the energy accumulator is in a stretched state;

FIG. 3 - part of the longitudinal movement of the slider;

FIG. 4 - the rotary part of the slide;

FIG. 5 - a fragment of the body with protrusions limiting the course of the toothed rack in case of damage.

The device for automatic retraction of the movable element of the guide for the furniture element is attached from the inner part of the guide (not shown in the drawing). The claimed structure contains a housing 1 made in the form of a U-shaped box. In the end zones of the body there are recesses 2, 3, which are in mating engagement with the protruding elements of the guide, which are hooks (no position assigned). In addition, the body is attached to the guide by means of a protrusion 4 formed integrally with the body. The protrusion 4 is located in the central part of the body.

The body is made of polymer material by casting or pressing.

An energy accumulator 5 is placed in the housing, which is used, for example, a spring. The energy accumulator 5 is fixed at one end in the end of the housing 1, the other is connected to the gear rack 6, which is part of the control system. In addition to the gear transmission, the control system includes a gear wheel 7, which interacts with the rack 6 in response. When the wheel 7 rotates, its teeth slip through the lock 8, which does not allow the gear wheel to arbitrarily change its position when the gear rack is moved, which, in turn, is affected by the tension force energy accumulator. Such a constructive interconnection of the elements regulates the movement, and, accordingly, the stretching of the energy accumulator, since the spring is fixed in a certain position. At the ends of the toothed rack on the side opposite to the arrangement of the teeth, there are limiting protrusions 9, 10, one of them 10 being stepped. In the event of the destruction of the teeth of the rack 6, its course is limited by the protrusions 11, 12 made in the housing 1.

The housing has a guide rail 13, on which a slider 14 is placed with the possibility of longitudinal and rotational movement, consisting of a part of longitudinal rectilinear movement 15 and a movable rotary part 16. The part of the longitudinal movement is provided with a rotation element in the form of an axis 17. In addition, in the part of the longitudinal for moving the slider, a groove for the guide rail 13 is made, as well as a groove 18 serving to secure the energy accumulator and a groove 19 intended for fastening the rod 20 of the shock absorber 21 located in the housing compartment. In the rotary part of the slider there is a through hole 22 for the axis of rotation 17 and a guide protrusion 23 for the guide rail 13. The stroke of the slider is limited by the protrusion 24 and a groove 25 made in the end of the housing.

The slider can be partially or completely made of damping material.

The guide rail is L-shaped.

The device works as follows.

In the initial position, in which the energy accumulator 5 is completely weakened, the toothed rack 6 with its limiting protrusion 9 abuts against the protrusion 11 made in the housing 1. To bring the sliding furniture element from the “closed” position to the “open” position, it is necessary to act on the activator ( not shown in the drawing), which is installed on the movable part of the guide by applying a force on the pull-out piece of furniture, for example, on its facade, in the direction of the "open" position. The applied force leads to the action of the activator on the slider 14, which begins to move longitudinally.

When the slider moves, the position of the rod 20 associated with the slider and, accordingly, the shock absorber 21 changes, as well as the stretching of the energy accumulator 5 relative to the gear rack 6, the distance of movement of which is determined depending on the movement of the gear wheel 7, the position of which is fixed by the lock 8.

The maximum stretching of the energy accumulator 5 is limited by the protrusion 11 of the housing 1.

When the activator acts on the slider, during the movement of the drawer in the "closed" direction, it is necessary to extinguish the vibrations that occur in the vertical (bouncing) and horizontal (galloping) planes. To reduce the resulting vibrations, a shock absorber 21 is installed in the housing, connected through a rod 20 with a slide 14, which is connected to an energy accumulator 5, in turn connected to a gear rack 6.

The return movement when closing the drawer is carried out in the reverse order.

The stretching of the spring 5 leads to the fact that the force to activate / deactivate the device increases and, conversely, the relaxation of tension leads to the fact that the force to activate / deactivate the device decreases. To prevent the failure of the energy accumulator 5 in case of damage to the toothed rack, the projections 11, 12 of the housing serve to limit the rack travel and, accordingly, to regulate the stretching of the energy accumulator. Thus, the spring 5 will continue to perform its function, but with a minimum tension force.

The claimed device is more reliable, has improved performance characteristics, provides the ability to regulate the tension force of the energy accumulator.

Claims (3)

1. A device for automatic retraction of the movable part of the guide for a sliding piece of furniture, including a housing with a guide rail placed inside it, on which a slider connected with an energy accumulator is installed with the possibility of longitudinal and rotational movement, as well as a control system with a gear wheel, characterized in that the slider is connected to a shock absorber through a piston rod, as well as to an energy accumulator connected through a toothed rack to a toothed wheel, the position of which is determined by a latch, while the toothed rack is equipped with limiting protrusions that reciprocate with the protrusions of the body, which ensures the preservation of the battery's functions in case of damage gear rack. 2. The device according to claim 1, characterized in that the body is made of a polymer material. 3. A device according to claim 1, characterized in that a spring is used as an energy accumulator.

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