Rail mechanism

Abstract

The invention relates to a rail mechanism comprising a rail profile for increasing the service life. The rail mechanism comprises a first rail for fixing to a furniture body, a second rail being movable telescopically relative to the first rail, and a third rail for fixing to a drawer. The rails can move telescopically relative to each other. There is a first and a second carrying element to provide the telescopic movement between the rails. The first rail comprises a first rail base and a first rail side edges. The each first rail side edge comprises a bearing section and a support section connected to the bearing section. The bearing section comprises a support surface and a movement surface. In the rail mechanism, the vertical distance between the ends of the support section of the first rail side edge is less than the vertical distance between the support surfaces of the first rail side edges. In this way, the durability of the rail mechanism is increased, the first rail side edges are made stronger and rigid, and the deformation of the first rail caused by stretching is prevented.

Description

[0001] RAIL MECHANISM

[0002] TECHNICAL FIELD

[0003] The invention relates to a rail mechanism comprising a rail profile for increasing the service life of the rail.

[0004] STATE OF THE ART

[0005] Telescopic rail mechanisms for opening and closing the drawer, which have some parts connected to the drawer and some parts connected to the furniture, have been used in furniture for many years. These rail mechanisms are a mechanical system that facilitates user to access to the contents inside the drawer. The rail mechanisms usually comprises an inner rail, preferably a middle rail, and an outer rail. The outer rail is fixed to the furniture and the inner rail is fixed to the drawer. The middle rail is located between the inner rail and the outer rail. The movement of the rails relative to each other is provided by the ball carrying elements there between.

[0006] The outer rail is fixed to the furniture, and the middle rail moves in the longitudinal axis relative to the outer rail. The inner rail is fixed to the drawer and moves in the longitudinal axis relative to the middle rail and the outer rail. The outer rail carries the middle rail and inner rail. In rail mechanisms where there is no middle rail present, the outer rail only carries the inner rail.

[0007] When the user pulls the drawer to open the drawer, the inner rail and the middle rail move in the pulling direction and the rail mechanism opens. When the user pushes the drawer to close the drawer, the inner rail and the middle rail move in the pushing direction and the rail mechanism closes. There are some situations that adversely affect the service life of the currently used telescopic rails. For example, the thickness of the sheet metal used in the manufacture of the outer rail is generally preferred in small sizes in terms of cost and space saving. Depending on the use, the outer rail undergoes deformation over time, not being able to carry the vertical force created by the weight of the rails and the drawer, and cannot carry the middle rail and the inner rail, causing the rail to dismantle and the drawer to fall.

[0008] Another problem is that when the user applies an unusual high amount of pulling or pushing force to the drawer in the horizontal direction while opening and closing the drawer, the inner rail and the middle rail can fall from the outer rail by continuing their continuous movement in the pulling or pushing direction. This situation again reveals the problem of the dismantling of the rail.

[0009] The above-mentioned problems are solved by the rail mechanism of the invention.

[0010] OBJECT OF THE INVENTION

[0011] The object of the invention is to provide a rail mechanism with high resistance to the forces it is subjected to during use.

[0012] SUMMARY OF THE INVENTION

[0013] The invention relates to a rail mechanism comprising a rail profile for increasing the service life of the rail mechanism. The rail mechanism comprises a first rail for fixing to a furniture body, a second rail being movable telescopically relative to the first rail, and a third rail for fixing to a drawer. The third rail can move telescopically relative to the first rail and the second rail. The rail mechanism comprises a first carrying element between the first rail and the second rail, and a second carrying element between the second rail and the third rail, respectively, for the telescopic movement of the rails relative to each other. The first rail comprises a first rail base and a first rail side edges arranged opposite to each other at an angle relative to the first rail base. Each said first rail side edge comprises a bearing section adapted to bear the first carrying element and a support section connected to the bearing section. The bearing section comprises a support surface and a movement surface. The balls of the first carrying element are guided on the movement surface, while the body in which the balls are housed is guided on the support surface. In the rail mechanism, the vertical distance between the ends of the support section of the first rail side edges arranged opposite to each other is less than the vertical distance between the support surfaces of the first rail side edges. The vertical distance between the ends of the support section of the first rail side edges being less than the vertical distance between the support surfaces of the first rail side edges means that the ends of the support section are spaced apart with a narrower gap than the support surfaces. With the narrow ends of the support section, it is ensured that the first carrying element is firmly supported in bearings in the bearing section. In this way, the first carrying element evenly and effectively distributes the loads on the rail mechanism over a large area. Thus, the bearing capacity of the first rail bearing the second rail, the third rail and the carrying elements is increased and the rail mechanism is prevented from dismantling if it is exposed to high forces. The first rail side edges being stronger and rigid prevents the deformation of the first rail due to stretching.

[0014] The vertical distance between the ends of the support section of the first rail side edges arranged opposite to each other is preferably 5% to 10% less than the vertical distance between the support surfaces of the first rail side edges. The range of 5% to 10% is the most optimal. This range optimizes the bearing alignment of the carrying elements, the second rail, and the third rail on the rail mechanism. The ratio between the vertical distance between the ends of the support section and the vertical distance between the support surfaces ensures that the first carrying element is firmly supported in bearings. In this way, a more balanced distribution of the loads in the rail mechanism is ensured. Local stress points on the rail mechanism are reduced and the durability of the rail is increased. By increasing the durability of the rail mechanism, the risk of bending and deformation is reduced, thus ensuring a long-lasting rail.

[0015] Said support section is preferably integrated with the bearing section. The support section can be designed monolithically depending on the bearing section. With the integrated structure, durable connection points are provided. The integration of the support section with the bearing section strengthens the contact points of the carrying elements with the rail and provides a more robust connection. Thus, the durability of the rail mechanism is increased and the rail mechanism requires less maintenance in longterm use. Furthermore, the reinforced connection points experience less stretching or slipping under load, which improves surface stability. In addition, mounting and maintenance processes are simplified due to the integrated structure. This results in reduced mounting errors and maintenance requirements. At the same time, it improves the overall aesthetic appearance of the rail mechanism and offers a more professional appearance. The vertical distance between the movement surfaces of said first rail side edges arranged opposite to each other is preferably more than the vertical distance between the support surfaces of the first rail side edges. This situation allows the first carrying element to have more contact area on the movement surface and therefore the balls to move more steadily on the movement surface. Furthermore, this prevents the first carrying element from operating in the wrong position. The first carrying element moves freely between the rails without encountering problems such as slipping on the support surface in an incorrect position. Therefore, by ensuring that the first carrying element operates in the correct position and more stably, it is ensured that the rail mechanism operates more safely and effectively. The movement surface can preferably be arranged in the form of an arc.

[0016] Said first rail may comprise a first stop element protruding from the first rail base at the first rail first end and abutting the first carrying element when the rail mechanism is opened. The stop element inhibits the movement of the first carrying element in the pulling direction along the longitudinal axis of the rail when the rail mechanism is moved in the pulling direction. The first stop element abuts the first carrying element, limiting the movement of the first carrying element in the direction of the opening of the rail and thus preventing the detachment of the first carrying element from the rail mechanism in the pulling direction.

[0017] Said first rail may preferably comprise a second stop element in an elastic sform protruding from the first rail base at the first rail second end and abutting the second rail when the rail is closed. The elastic second stop element located at the the first rail second end abuts the second rail when the rail is closed, limiting the movement of the second rail along the longitudinal axis in the pushing direction when the rail mechanism is moved in the pushing direction. The second stop element abuts the second rail, preventing the second rail from falling while the rail mechanism is closing. The second stop element can be made of a plastic material, thus absorbing the impacts on the second rail and increasing the durability of the rail. The second stop element ensures the safety of the rail mechanism while at the same time increasing the stability of the second rail.

[0018] Said second rail preferably comprises a third stop element protruding from the second rail side edges at the second rail first end and abutting the first carrying element when the rail is opened. The third stop element located at the second rail first end abuts the first carrying element when the rail is opened, limiting the movement of the second rail along the longitudinal axis in the pulling direction when the rail mechanism is moved in the pulling direction. The third stop element abuts the first carrying element, preventing the second rail from falling when the rail mechanism is open. When the third stop element abuts the first carrying element, it prevents the movement of the second rail in the pulling direction, ensuring the safe and stable operation of the rail mechanism. The third stop element prevents the second rail from falling out of the rail mechanism. In this way, it ensures the long-lasting and reliable operation of the rail mechanism, increasing the safety and satisfaction of users.

[0019] Said second rail preferably comprises a fourth stop element at the second rail second end, which abuts the second carrying element when the rail is opened. The fourth stop element located at the second rail second end abuts the second carrying element when the rail is opened, limiting the movement of the second carrying element along the longitudinal axis of the rail in the pulling direction when the rail mechanism is moved in the pulling direction. The stop element abuts the second carrying element, preventing the second carrying element from falling when the rail mechanism is open. When the fourth stop element abuts the second carrying element, it prevents the movement of the second carrying element in the pulling direction, ensuring the safe and stable operation of the rail mechanism. The fourth stop element prevents the second carrying element from falling off due to detaching from the rail mechanism in the pulling direction. In this way, it ensures the long-lasting and reliable operation of the rail mechanism, increasing the safety and satisfaction of users.

[0020] Said fourth stop element preferably comprises a head section in an elastic form that abuts the third rail when the rail mechanism is closed. When the rail mechanism is closed, the head section abuts the third rail. When the rail mechanism is moved in the pushing direction, it closes and abuts the third rail. Thus, it prevents the movement of the third rail along the longitudinal axis in the pushing direction. In this way, the third rail is prevented from falling off due to detaching from the rail mechanism in the pushing direction. The head section acts as a shock absorber when the rail mechanism abuts the third rail when it closes. The elastic structure reduces the effect of the impact, preventing wear and damage to the mechanism, while softening the movement and providing a silent and smooth stop. Furthermore, it minimizes the risk of rebound and reduces noise. The durability of the elastic material supports the longevity of the stop element and rail mechanism.

[0021] Said fourth stop element preferably comprises a middle section in an elastic form that abuts the third rail and / or a release element when the rail mechanism is opened. When the rail mechanism is moved in the pulling direction and opened, the middle section abuts the third rail and / or the release element, preventing the movement of the third rail in the pulling direction. Thus, the third rail is prevented from falling off due to detaching from the rail mechanism in the pulling direction. Furthermore, when the middle section rail mechanism abuts the third rail and / or the release element when opening, it absorbs impacts on the third rail and / or the release element, while ensuring the correct guidance of the rails and absorbs noise, ensuring silent operation of the mechanism.

[0022] The first carrying element comprises a body, preferably made of a plastic material. When the rail mechanism is moved in the pulling direction, the first carrying element abuts the first stop element from the body first end and the third stop element from the body second end. The body made of a plastic material absorbs impacts to the first stop element and the second rail. This prevents damage to the first stop element and the second rail. The body made of plastic, provides protection against impacts to the first stop element which the first carrying element abuts and the second rail. In this way, damage to the first stop element and the second rail is prevented, the durability of the rail mechanism is increased and a long-lasting use is ensured.

[0023] BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a perspective view of the rail mechanism of the invention connected to the furniture body and drawer,

[0025] Figure 2 is a frontal cross-sectional view of the rail mechanism of the invention connected to the furniture body and drawer,

[0026] Figure 3 is a perspective view of the first rail,

[0027] Figure 4 is a frontal view of the first rail, Figure 5 is a perspective view of the rail mechanism of the invention,

[0028] Figure 5a is a detailed perspective view of the rail mechanism of the invention,

[0029] Figure 5b is a detailed perspective view of the first rail,

[0030] Figure 5c is another detailed perspective view of the rail mechanism of the invention,

[0031] Figure 6 is a side view of the second rail.

[0032] Figure 7 is an exploded view of the rail mechanism of the invention,

[0033] REFERENCE NUMBERS

[0034] 10. Furniture body

[0035] 20. Drawer

[0036] 30. Rail mechanism

[0037] 30.1 . First stop element

[0038] 30.2. Second stop element

[0039] 30.3. Third stop element

[0040] 30.4. Fourth stop element

[0041] 30.4.1. Head section

[0042] 30.4.2. Middle section

[0043] 31. First rail

[0044] 31.1. First rail base

[0045] 31.2. First rail side edge

[0046] 31.3. Bearing section

[0047] 31 .3.1 . Support surface

[0048] 31 .3.2. Movement surface

[0049] 31.4. Support section

[0050] 31 .5. First rail first end

[0051] 31 .6. First rail second end

[0052] 32. Second rail

[0053] 32.1 . Second rail first end

[0054] 32.2. Second rail second end 32.3. Second rail side edge

[0055] 32.4. Second rail base

[0056] 33. Third rail

[0057] 33.1 . Third rail tab

[0058] 34.1 . First carrying element

[0059] 34.1.1. Body

[0060] 34.1.2. Body first end

[0061] 34.1 .3 Body second end

[0062] 34.2. Second carrying element

[0063] 35. Release element

[0064] 36. Mounting hole

[0065] 37. Ball

[0066] F1 . Pulling direction

[0067] F2. Pushing direction

[0068] F3. Vertical direction

[0069] +x, -x. Longitudinal axis of the rail a. Vertical distance between the support surfaces b. Vertical distance between the movement surfaces c. Vertical distance between the ends of the support section

[0070] DETAILED DESCRIPTION OF THE INVENTION

[0071] Figure 1 shows a furniture body (10) and a drawer (20) forming the main furniture. With the rail mechanism (30), the drawer (20) can move on the longitudinal axis of the rail (+x, -x), in the pulling direction (F1 ) and in the pushing direction (F2) relative to the furniture body (10). The pulling direction (F1 ) is the direction in which the drawer (20) is pulled out of the furniture body (10), while the pushing direction (F2) is the direction in which the drawer is pushed into the furniture body (10). Figure 1 shows the position where the drawer (20) is pulled out of the furniture body (10) and the rail mechanism (30) is opened. When the drawer (20) is pushed into the furniture body (10), the rail mechanism (30) closes.

[0072] Figure 2 shows a frontal cross-sectional view of the rail mechanism (30) connected to the furniture body (10). The rail mechanism (30) comprises a first rail (31 ) for being fixed to a furniture body (10), a second rail (32) capable of telescopic movement relative to the first rail (31 ), and a third rail (33) for being fixed to a drawer (20). The third rail (33) is capable of telescopic movement relative to the first rail (31 ) and the second rail (32). The rail mechanism (30) comprises a first carrying element (34.1 ) between the first rail (31 ) and the second rail (32), and a second carrying element (34.2) between the second rail (32) and the third rail (33), respectively, for the telescopic movement of the rails (31 , 32, 33) relative to each other. The first rail (31 ) comprises a first rail base (31.1 ) and a first rail side edges (31 .2) arranged opposite to each other at an angle relative to the first rail base (31.1 ). Each the first rail side edge (31.2) comprises a bearing section (31.3) adapted to bear the first carrying element (34.1 ) and a support section (31 .4) connected to the bearing section (31.3). The bearing section (31.3) comprises a support surface

[0073] (31.3.1 ) and a movement surface (31.3.2). In the rail mechanism (30), the vertical distance (c) between the ends of the support section (31.4) of the first rail side edges

[0074] (31 .2) arranged opposite to each other is less than the vertical distance (a) between the support surfaces (31.3.1 ) of the first rail side edges (31.2). In this way, a tight bearing of the first carrying element (34.1 ) and a balanced distribution of loads are ensured; therefore, bending and deformation of the first rail (31 ) under load is prevented.

[0075] The first rail (31 ) is fixed to the furniture body (10) and the third rail (33) to the drawer (20) by means of elements such as screws etc. through multiple mounting holes (36) they comprise. The first rail (31 ) can be manufactured from materials such as steel, aluminum, or durable plastic.

[0076] As shown in Figure 3, the first rail side edges (31.2) bear the first carrying element (34.1) in the bearing section (31.3) it comprises. The support surface (31.3.1 ) supports the bearing of the first carrying element (34.1 ) on the movement surface (31.3.2). The first carrying element (34.1 ) has multiple balls (37) that can be manufactured from steel, stainless steel, plastic or ceramic. The balls (37) move on the movement surface

[0077] (31 .3.2), which is in the form of an arc. The bearing section (31 .3) allows the first carrying element (34.1 ) to move in the horizontal direction (F1 , F2) on the movement surface

[0078] (31.3.2) it comprises. The first rail side edges (31.2) comprise a support section (31.4) connected to the bearing section (31.3). The bearing section (31.3) may have a low- friction and wear-resistant coating. This ensures that the first carrying element (34.1 ) slides silently and smoothly. When opening and closing the drawer (20), the weight of the drawer (20), the weight of the loads inside the drawer (20), the weight of the carrying elements (34.1 , 34.2), the weight of the second rail (32) and the third rail (33) are transferred to the first rail (31 ). Therefore, forces in vertical direction (F3) are likely to occur on the first rail side edges (31 .2). In present rail mechanisms, there is a risk that the first rail side edge (31 .2) may stretch and dismantle in the vertical direction (F3) due to the effect of vertical directional (F3) forces.

[0079] In Figure 4, the vertical distances between the support surfaces (31.3.1 ), movement surfaces (31.3.2), and support section (31.4) ends of the first rail side edges (31.2) are shown as (a), (b), and (c), respectively. In the rail mechanism of the invention, the distance (c) is arranged such that it is less than the distance (a). Thus, it is ensured that the first side edges (31 .2) are stronger and rigid. The overall durability of the structure is increased by preventing the rail mechanism (30) of the invention from stretching in the vertical direction (F3) due to weight. By reducing the risk of stretching and bending of the first rail (31 ), the safe operation of the rail mechanism (30) is ensured.

[0080] The vertical distance (c) between the ends of the support section (31.4) of the first rail side edges (31 .2) arranged opposite to each other is preferably 5% to 10% less than the vertical distance (a) between the support surfaces (31.3.1 ) of the first rail side edges (31 .2). Here, with the vertical distance (c) of the ends of the support section (31 .4) being 5% to 10% less than the vertical distance (a) of the support surfaces (31 .3.1 ), the ends of the support section (31.4) are in the most ideal ratio and narrower than the support surface (31 .3.1 ). With the narrow structure applied at the most ideal ratio, the structural integrity of the rail mechanism (30) is increased. A balanced load distribution is ensured on the rail mechanism (30). This ensures that the rail mechanism (30) operates safely without deformation under high load.

[0081] The support section (31.4) is preferably integrated with the bearing section (31.3). The support section (31.4) can be designed and produced as monolithic depending on the bearing section (31.3). With the integrated structure, there is no need for extra connection or mounting elements. Thus, the uniform distribution of the forces generated on the rail mechanism (30) and surface stability are ensured. The support section (31.4) forms a curve along the first side edges (31.2). By bending the bearing section (31 .3) in one direction and then bending it again in the opposite direction, the curved form of the support section (31.4) can be created. As shown in Figure 4, the first curve can be in one direction (e.g., downward or to the right) and the second curve can be in the opposite direction (e.g., upward or left).

[0082] The vertical distance (b) between the movement surfaces (31.3.2) of the first rail side edges (31.2) arranged opposite to each other is preferably more than the vertical distance (a) between the support surfaces (31.3.1 ) of the first rail side edges (31.2). Here, there is a difference between the vertical distance (b) between the movement surfaces (31.3.2) and the vertical distance (a) between the support surfaces (31.3.1 ). This difference prevents the first carrying element (34.1 ) from operating in the wrong position. The first carrying element (34.1 ) remains on the movement surface (31 .3.2) as designed and does not move to the support surface (31.3.1 ). Designing the vertical distance (b) between the movement surfaces (31 .3.2) to be greater than the vertical distance (a) between the support surfaces (31.3.1 ) ensures correct bearing of the carrying element and reduces the risk of moving to the support surface (31.3.1 ). Thus, the durability and safety of the rail mechanism (30) of the invention are increased, maintenance needs are reduced and its overall performance is improved.

[0083] In order to open and close the drawer (20), the user applies force to the rail mechanism (30) in the pulling direction (F1 ) and in the pushing direction (F2). With the uncontrolled application of the force applied in the pulling direction (F1 ) and in the pushing direction (F2) by the user, there is a risk that the rails (31 , 32, 33) and carrying elements (34.1 , 34.2) contained in the rail mechanism (30) will detach from the rail mechanism (30) and the rail mechanism (30) will fail. This risk has been reduced with the embodiment subject to the invention.

[0084] Figure 5 shows a perspective view of the rail mechanism (30). Figure 5a shows a detailed perspective view of the rail mechanism (30). The first rail (31 ) preferably comprises a first stop element (30.1 ) that protrudes from the first rail base (31.1 ) at the first rail first end (31.5) and abuts the first carrying element (34.1 ) when the rail mechanism (30) is opened. As shown in Figure 5a, the first stop element (30.1 ) is located at the first rail first end (31.5) of the first rail (31 ) and is positioned to protrude from the first rail base (31.1 ). The first stop element (30.1 ) ensures that the first carrying element (34.1 ) stops when the rail mechanism (30) is opened. Thus, the movement of the first carrying element (34.1 ) on the first rail (31 ) is limited.

[0085] The first stop element (30.1 ) may preferably be made of a durable material, for example steel or hard plastic. In this way, it does not wear out with the abutment of the first carrying element (34.1 ) against it. By its structure, it is designed to ensure that the first carrying element (34.1 ) stops smoothly and safely, and supports the smooth and controlled movement of the rail mechanism (30). The first stop element (30.1 ) helps to secure the drawer (20) in the desired position and limit the movement, improving the overall performance and reliability of the rail mechanism (30). When the rail mechanism (30) is moved in the pulling direction (F1 ) and opened, the first stop element (30.1 ) abuts the first carrying element (34.1 ), preventing the movement of the first carrying element (34.1 ) along the longitudinal axis of the rail in the pulling direction (F1 ). Thus, the first carrying element (34.1 ) is prevented from falling off due to detaching from the rail mechanism (30) in the pulling direction (F1 ).

[0086] Figure 5b shows a detailed perspective view of the first rail (31 ). The first rail (31 ) preferably comprises a second stop element (30.2) in an elastic form protruding from the first rail base (31.1 ) at the first rail second end (31.6) and abutting the second rail (32) when the rail mechanism (30) is closed. The second stop element (30.2) located at the first rail second end (31.6) of the first rail (31 ) has an elastic form made of durable material. The second stop element (30.2) protrudes from the first rail (31 ), preventing excessive movement of the second rail (32) in the pushing direction (F2) and damage to the rail mechanism (30). When the rail mechanism (30) is moved in the pushing direction (F2) and closed, the second stop element (30.2) abuts the second rail (32), preventing the movement of the second rail (32) along the longitudinal axis of the rail mechanism (30) in the pushing direction (F2). Thus, the second rail (32) is prevented from falling off due to detaching from the rail mechanism (30) in the pushing direction (F2). Also, the second stop element (30.2) has shock-absorbing properties owing to its elastic form.

[0087] Figure 5c shows another detailed perspective view of the rail mechanism (30) of the invention. The second rail (32) preferably comprises a third stop element (30.3) that protrudes from the second rail side edges (32.3) at the second rail first end (32.1 ) and abuts the first carrying element (34.1 ) when the rail mechanism is opened. The third stop element (30.3) located at the second rail first end (32.1 ) of the second rail (32) is made of durable material and protrudes from the second rail side edges (32.3), abutting the first carrying element (34.1 ) when the rail mechanism (30) is opened. When the rail mechanism (30) is moved in the pulling direction (F1 ) and opened, the third stop element (30.3) abuts the first carrying element (34.1 ), preventing the movement of the second rail (32) along the longitudinal axis of the rail in the pulling direction (F1 ). Thus, the second rail (32) is prevented from falling off due to detaching from the rail mechanism (30) in the pulling direction (F1 ).

[0088] Figure 6 shows a side view of the second rail (32). The second rail (32) preferably comprises a fourth stop element (30.4) at the second rail second end (32.2) which abuts the second carrying element (34.2) when the rail mechanism (30) is opened.

[0089] The fourth stop element (30.4) is located at the second rail second end (32.2) so that the second rail (32) is located at the second rail base (32.4). When the rail mechanism (30) is moved in the pulling direction (F1 ) and opened, the fourth stop element (30.4) abuts the second carrying element (34.2), preventing the movement of the second carrying element (34.2) along the longitudinal axis of the rail mechanism (30) in the pulling direction (F1 ). Thus, the second carrying element (34.2) is prevented from falling off due to detaching from the rail mechanism (30) in the pulling direction (F1 ).

[0090] The fourth stop element (30.4) preferably comprises an head section (30.4.1 ) in an elastic form that abuts the third rail (33) when the rail mechanism (30) is closed. When the rail mechanism (30) is closed, the head section (30.4.1 ) abuts the third rail (33). When the rail mechanism (30) is moved in the pushing direction (F2) and closed, the head section (30.4.1 ) abuts the third rail tab (33.1 ), preventing the movement of the third rail (33) along the longitudinal axis of the rail mechanism (30) in the pushing direction (F2). Thus, the third rail (33) is prevented from falling off due to detaching from the rail mechanism (30) in the pushing direction (F2). The third rail tab (33.1 ) is located on the third rail (33). The tab (33.1 ) is arranged such that it covers one end of the third rail (33) and prevents particles from entering the rail mechanism.

[0091] The fourth stop element (30.4) preferably comprises a middle section (30.4.2) in an elastic form that abuts the third rail (33) and / or a release element (35) when the rail mechanism (30) is opened. When the rail mechanism (30) is moved in the pulling direction (F1 ) and opened, the middle section (30.4.2) abuts the third rail (33) and / or the release element (35), preventing the movement of the third rail (33) in the pulling direction (F1 ). Thus, the third rail (33) is prevented from falling off due to detaching from the rail mechanism (30) in the pulling direction (F1 ).

[0092] The first carrying element (34.1 ) comprises a body (34.1 .1 ), preferably made of plastic. The body (34.1 .1 ) may comprise bearings, balls (37) or sliding elements. These elements allow the first carrying element (34.1 ) to move smoothly on the rails (31 , 32, 33). When the rail mechanism (30) is moved in the pulling direction (F1 ), the first carrying element (34.1 ) abuts first stop element (30.1 ) from the body first end (34.1.2) and third stop element (30.3) from the body second end (34.1.3). The first carrying element (34.1 ) comprises a body (34.1 .1 ) made of a plastic material, which absorbs the impact on the first stop element (30.1 ) and the second rail (32) and prevents damage to the rail mechanism (30).

[0093] Figure 7 shows an exploded view of the rail mechanism (30) of the invention. The rail mechanism (30) includes mounting elements such as screws etc. (not shown in the figures), carrying elements (34.1 , 34.2), stop elements (30.1 , 30.2, 30.3, 30.4) and release elements (35) in addition to the first rail (outer rail) (31 ), second rail (middle rail) (32) and third rail (inner rail) (33) made of steel, aluminum or durable plastic. The mounting elements allow the rail mechanism (30) to be mounted on the furniture body (10) and on the drawer (20). For this reason, there are multiple mounting holes (36) on the first rail (31 ) and third rail (33). The stop elements (30.1 , 30.2, 30.3, 30.4) determine the movement limits of the carrying elements (34.1 , 34.2) and rails (31 , 32, 33). The release element (35) allows the third rail (33) to be released from the rail mechanism (30) and is mounted on the third rail (33).

Claims

CLAIMS1 . A rail mechanism (30), said rail mechanism (30) comprising, a first rail (31 ) for fixing to a furniture body (10), a second rail (32) being movable telescopically relative to the first rail (31 ), a third rail (33) for fixing to a drawer (20), and said third rail (33) being movable telescopically relative to the first rail (31 ) and the second rail (32), a first carrying element (34.1 ) between the first rail (31 ) and the second rail (32) and a second carrying element (34.2) between the second rail (32) and the third rail (33), respectively, for the telescopic movement of said rails (31 ,32,33) relative to each other, said first rail (31 ) comprising a first rail base (31.1 ) and a first rail side edges (31 .2) arranged opposite to each other at an angle relative to the first rail base(31.1 ), each said first rail side edge (31 .2) comprising a bearing section (31 .3), which is adapted to bear the first carrying element (34.1 ), and a support section (31.4) connected to said bearing section (31.3). said bearing section (31.3) comprising a support surface (31.3.1 ) and a movement surface (31 .3.2), characterized in that; the vertical distance (c) between the ends of the support section (31 .4) of the first rail side edges (31.2) arranged opposite to each other is less than the vertical distance (a) between the support surfaces (31.3.1 ) of the first rail side edges(31.2).

2. A rail mechanism according to claim 1 , characterized in that the vertical distance (c) between the ends of the support section (31 .4) of the first rail side edges (31 .2) arranged opposite to each other is 5 to 10% less than the vertical distance (a) between the support surfaces (31.3.1 ) of the first rail side edges (31.2).

3. A rail mechanism according to claim 1 to 2, characterized in that the support section (31 .4) is integrated with the bearing section (31 .3).

4. A rail mechanism according to claim 1 to 3, characterized in that the vertical distance (b) between the movement surfaces (31.3.2) of the first rail side edges(31 .2) arranged opposite to each other is more than the vertical distance (a) between the support surfaces (31 .3.1 ) of the first rail side edges (31 .2).

5. A rail mechanism (30) according to claim 1 to 4, characterized in that the first rail (31 ) comprises a first stop element (30.1 ) protruding from the first rail base (31 .1 ) at the first rail first end (31 .5) and abutting the first carrying element (34.1 ) when the rail mechanism (30) is opened.

6. A rail mechanism (30) according to claim 1 to 5, characterized in that the first rail (31 ) comprises a second stop element (30.2) in an elastic form protruding from the first rail base (31 .7) at the first rail second end (31 .6) and abutting the second rail (32) when the rail mechanism (30) is closed.

7. A rail mechanism (30) according to any one of the preceding claims, characterized in that the second rail (32) comprises a third stop element (30.3) protruding from the second rail side edges (32.3) at the second rail first end (32.1 ) and abutting the first carrying element (34.1 ) when the rail mechanism (30) is opened.

8. A rail mechanism (30) according to any one of the preceding claims, characterized in that the second rail (32) comprises a fourth stop element (30.4) at the second rail second end (32.2) which abuts the second carrying element (34.2) when the rail mechanism (30) is opened.

9. A rail mechanism according to Claim 8, characterized in that the fourth stop element (30.4) comprises a head section (30.4.1 ) in an elastic form that abuts the third rail (33) when the rail mechanism (30) is closed.

10. A rail mechanism according to claim 8 to 9, characterized in that the fourth stop element (30.4) comprises a middle section (30.4.2) in an elastic form that abuts the third rail and / or a release element (35) when the rail mechanism (30) is opened.11 . A rail mechanism according to any one of the preceding claims, characterized in that the first carrying element (34.1) comprises a body (34.1 .1 ) made of a plastic material.

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