EP1625270B1 - Lid-positioning device - Google Patents

Abstract

A lid stay, for furniture, including a first arm (1) and a second arm (2) which are connected to each other so as to be pivotable about a swivel pin (3) between an open position and a closed position; a convex positioning contour (4) that is disposed on the first arm (1), extends around a central axis (5) located parallel to the swivel pin (3), and has the shape of a circular arc when viewed from a cross-section running perpendicular to the central axis (5); a positioning slide (8) which is movably guided along a positioning axis (9) by means of the first arm (1), is provided with a flat support area (12) facing the positioning contour (4), and is spring-biased in the direction of the positioning contour (4); and a sliding block (13), a concave first sliding surface (14) of which slidably leans on the positioning contour (4), while a flat second sliding surface (15) thereof slidably leans on the support area (12). The first sliding surface (14) extends around the central axis (5) in the shape of a circular arc and has the same curvature as the positioning contour (4).

Description

The invention relates to a cover plate for holding a lid or a flap of a piece of furniture. The lid is usually arranged vertically and hinged to a piece of furniture. By means of hinges, e.g. at an upper edge of the lid, the lid is pivotally attached to a body of the furniture. The lid can be folded from the vertical closed position to the top in an open position in which the lid is arranged substantially horizontally or inclined.

In DE 299 03 503 U1 a cover plate is described, which has a first arm and a second arm, which are pivotally connected to each other about a pivot axis. The first arm forms a control contour in the form of a curve whose radial distance from the pivot axis increases starting from a first position of the two arms relative to each other over part of the angular travel and decreases again towards the end of the angular travel. The second arm is associated with a lock slider which is slidably mounted and which is acted upon by means of springs in contact with the control contour of the first arm. The cover plate is used to hold a lid of a roof box, wherein the setting contour is formed such that over the largest angular travel of the cover plate is acted upon to a position corresponding to the open position of a lid of the roof box. A tightening torque is generated in the direction of a position of the two arms over a smaller angular distance, which corresponds to the closed position of the lid of the roof box. The installation torque in the direction of the open position of the lid is due to the increasing radial distance achieved the control contour to the pivot axis. Here, the curve of the control contour is adapted to the kinematic conditions, so that always sufficient torque is generated to lift the lid or to hold in any position. The control slide here forms a support surface, which is acted upon in plant to the control contour. The support surface is in this case designed in a sectional plane perpendicular to the pivot axis V-shaped, so that forms a line contact between the control slide and the control contour. Thus, since a very small contact area is realized, high surface pressures occur, which limit the maximum flap weight that can be held by the lid plate, and reduce the life of the Deckelstellers.

Object of the present invention is to provide a cover plate, which has a longer life.

• einen ersten Arm und einen zweiten Arm, die um eine Schwenkachse zwischen einer Offenstellung und einer Schließstellung schwenkbar miteinander verbunden sind,
• eine konvexe Stellkontur, die am ersten Arm vorgesehen ist, die um eine parallel zur Schwenkachse angeordnete Mittelachse verläuft und die in einem Schnitt senkrecht zur Mittelachse betrachtet kreisbogenförmig gestaltet ist,
• einen Stellschieber, der mittels des ersten Arms entlang einer Stellachse verschiebbar geführt ist, der eine zur Stellkontur gerichtete ebene Stützfläche aufweist und in Richtung zur Stellkontur federbelastet ist,
• einen Gleitschuh, der mit einer konkaven ersten Gleitfläche in gleitender Anlage zur Stellkontur steht und der mit einer ebenen zweiten Gleitfläche in gleitender Anlage zur Stützfläche steht, wobei die erste Gleitfläche kreisbogenförmig um die Mittelachse verläuft und dieselbe Krümmung aufweist wie die Stellkontur,

gelöst.The object is achieved by a cover plate, especially for furniture, comprising

• a first arm and a second arm which are pivotally connected to each other about a pivot axis between an open position and a closed position,
• a convex control contour, which is provided on the first arm, which extends around a central axis arranged parallel to the pivot axis and which, viewed in a section perpendicular to the central axis, is circular-arc-shaped,
• a lock slider, which is guided displaceably by means of the first arm along an adjusting axis, which has a positioning surface directed to the planar support surface and is spring-loaded in the direction of the control contour,
• a sliding shoe which is in sliding contact with the setting contour with a concave first sliding surface and which is in sliding contact with the support surface with a flat second sliding surface, the first sliding surface extending in a circular arc around the central axis and having the same curvature as the setting contour,

solved.

The control contour is viewed in a section perpendicular to the central axis circular arc configured, wherein the first sliding surface of the sliding shoe is formed opposite. Thus, a flat contact between the control contour and the first sliding surface is ensured, wherein the entire first sliding surface rests flat against the adjusting contour. Thus, point contacts or line contacts are avoided with high surface pressure.

Furthermore, both the support surface of the adjusting slide and the second sliding surface of the sliding block are flat, so that they are in planar contact with each other. Thus, a point or line contact is avoided between the shoe and the lock slider.

Due to the flat contact of the shoe on both the control contour and the support surface, the surface pressure is significantly reduced, so that the cover plate has a longer life. Furthermore, the shoe can be easily replaced, so that sliding shoes of different materials can be used. As a result, the resulting friction force can be varied, so that the cover plate can be easily adapted to different requirements. Preferably, the shoe is made of a different material than the adjusting contour and the support surface.

Due to the combination of materials and the eccentricity of the control contour, the torque characteristic of the cover plate can be adjusted so that the lid to be held is held in any position.

Furthermore, the adjusting contour, viewed in cross-section, may be both convex and straight, the first sliding surface having the same cross section.

In order to ensure a secure guidance of the sliding block along the setting contour, the first arm has a bead extending along the setting contour, axially projecting relative to the central axis, which engages in a correspondingly shaped groove of the sliding block, wherein the groove forms the first sliding surface. Thus, the Slip shoe on the bead and is guided along this when adjusting the two arms to each other.

Since the control contour is arranged concentrically to the pivot axis, resulting from the pivoting of the two arms to each other a changing distance of the contact region between the shoe and the control contour to the pivot axis. As a result, a torque is generated by the adjusting slide, which acts on the sliding shoe against the setting contour.

Preferably, in this case takes the radial distance of the adjusting contour to the pivot axis in the contact region between the shoe and the adjusting contour at least over a first part of the pivoting path, starting from an intermediate position of the two arms to each other, which is arranged between the open position and the closed position, from the open position.

Furthermore, it can be provided that the radial distance of the setting contour to the pivot axis in the contact region between the sliding shoe and the setting contour increases over a second part of the pivoting path, starting from the closed position of the two arms to each other to the intermediate position.

The support surface is arranged transversely to the adjusting axis, wherein the adjusting axis is preferably not arranged perpendicular to the support surface. The support surface can be arranged at any angle, whereby the torque characteristic over the pivoting path of the two arms can be adjusted to each other. The support surface may be integrally formed with the lock slider or be part of a separate component, which is connected to the lock slider. The separate component can be replaced to change the angle of the support surface to the adjustment of the lock slider.

Further, a support bearing may be provided, which is held at a variable distance from the pivot axis, wherein compression springs are provided, which are supported on the one hand against the control slide and on the other hand against the support bearing. in this connection the support bearing may be supported against a bearing surface of an abutment which is rotatably mounted about a rotation axis, wherein the bearing surface in the circumferential direction has a variable distance from the axis of rotation. Preferably, the bearing surface is designed snail-shaped.

The arms each have connecting means for connecting the respective arm to a lid or a body of a piece of furniture at a free end remote from the pivot axis.

If a support bearing is provided, this may have a parallel to the pivot axis extending bore, which constitutes the connecting means of the second arm.

A preferred embodiment is explained in more detail below with reference to the drawings.

Figur 1

einen Teillängsschnitt eines erfindungsgemäßen Deckelstellers in der Offenstellung;

Figur 2

den Deckelsteller gemäß Figur 1 in seiner Schließstellung, und

Figur 3

eine Draufsicht eines Gleitschuhs.

Herein shows

FIG. 1

a partial longitudinal section of a Deckelstellers invention in the open position;

FIG. 2

the lid plate according to Figure 1 in its closed position, and

FIG. 3

a plan view of a shoe.

Figures 1 and 2 show an embodiment of a lid disc according to the invention in two different positions and will be described together below.

The cover plate comprises a first arm 1 and a second arm 2, which are connected to one another by means of a hinge pin 22 about a pivot axis 4 pivotally are. The two arms 1, 2 are pivotable relative to one another between an open position shown in FIG. 1 and a closed position shown in FIG.

The first arm 1 forms on a second arm 2 facing the end of a convex adjusting contour 4, which is arranged about a parallel to the pivot axis 3 arranged central axis 5 and viewed in a section perpendicular to the central axis 5 circular arc. The control contour 4 is thus arranged eccentrically to the pivot axis 3.

The second arm 2 comprises a housing 6 and a cover, not shown here, wherein the housing 6 and the lid enclose an inner space 7. In the inner space 7, a locking slide 8 is guided displaceably along a control axis 9. The lock slider 8 is acted upon by means of compression springs 10, 11 in the direction of the control contour 4 with force. The lock slider 8 forms a control contour 4 facing just shaped support surface 12, with which the lock slider 8 is supported against a shoe 13, wherein the shoe 13 is in turn supported against the control contour 4 of the first arm 1. The adjusting slide 8 is thus indirectly supported via the sliding block 13 against the setting contour 4 of the first arm 1.

The sliding block 13 forms a concave first sliding surface 14, which is held in planar contact with the adjusting contour 4. For this purpose, the first sliding surface 14 extends around the central axis 5, which is arranged parallel to the pivot axis 3, and is designed as a circular arc in a section perpendicular to the central axis 5. In this case, the first sliding surface 14 has the same radius or the same curvature as the setting contour 4.

Further, the shoe 13 forms a second sliding surface 15, which is in planar contact with the support surface 12 of the adjusting slide 8. For this purpose, the second sliding surface 15 as well as the support surface 12 is configured flat.

The first arm 1 has at its end forming the adjusting contour 4 a surface 16 which is perpendicular to the pivot axis 3. From this surface 16 is relative to the pivot axis 3, a bead 17 axially, the bead 17 along the adjusting contour 4 runs. The sliding block 13 has a groove 18, shown in FIG. 3, which is formed corresponding to the bead 17. The bead 17 has a constant thickness, wherein the width of the groove 18 corresponds to the thickness of the bead 17. The groove 18 forms the first sliding surface 14 and a first guide surface 19, which is in contact with a second guide surface 20 of the bead 17, wherein the second guide surface 20 is disposed on the actuating contour 4 side facing away from the bead 17. Thus, the shoe 13 is guided along the bead 17.

The lock slider 8 has a support surface 12 limiting guide wall 21, along which the sliding block 13 relative to the support surface 12 is displaceable. The guide wall 21 extends parallel to the surface 16. The guide wall 21 is supported on the side facing away from the groove 18 on the sliding block 13 from. Thus, the shoe 13 is held securely against displacement in the direction of the pivot axis 3.

The locking slide 8 has two parallel to the adjusting axis 9 extending blind holes 23, 24. The blind bores 23, 24 each have a bore bottom 25, against which in each case one of the compression springs 10, 11 is supported in the direction of the control contour 4. At the other end of the compression springs 10, 11, these are supported against a support bearing 26. The support bearing 26 forms mandrels 27, 28 on which the compression springs 10, 11 are pushed and which dip into the blind bores 23, 24. Thus, the compression springs 10, 11 on the one hand by the blind holes 23, 24 and the mandrels 27, 28 held securely, so that bulging of the compression springs 10, 11 is prevented transversely to the adjusting axis 9.

The support bearing 26 is slidably guided in the housing 6. Here, it is supported against a bearing surface 30 of an abutment 29, wherein the abutment 29 is rotatably mounted about a rotation axis 31 in the housing 6, and wherein the bearing surface 30 has a variable distance from the axis of rotation 31 of the abutment 29, so that the support bearing 26 in a variable distance to the pivot axis 3 is held in the housing 6. The bearing surface 30 is helical and has radial locking recesses 32, in which a latching projection 33 of the support bearing 26 engages in order to prevent the abutment 29 is rotated unintentionally. In order to rotate the abutment 29 about the rotation axis 31, this has a hexagon socket 34, so that the abutment 29 is rotated by means of an Allen wrench and the bias of the compression springs 10, 11 can be varied. Furthermore, the abutment 29 has a bore 35, which serves as a connecting means for connecting the second arm 2 with a lid or a body of a piece of furniture. Likewise, the first arm 1 at its second end facing away from the second arm 2, a bore 36, which also serves as a connecting means for connecting the Deckelstellers with a body of a piece of furniture or a lid.

In Figure 1, the two arms 1, 2 are in their open position. Here, an end stop 37 of the first arm 1 against the support surface 12 in abutment, so that a pivoting of the two arms 1, 2 is prevented beyond the open position. Further, the adjusting contour 4 is arranged eccentrically to the pivot axis 3, so that when pivoting the two arms 1, 2 from the open position in the direction of the closed position shown in Figure 2, the distance between the contact region of the first sliding surface 14 of the shoe 13 on the control contour. 4 and the pivot axis 3 initially increased. In this case, by pivoting the two arms 1, 2 from the open position in the direction of the closed position of the adjusting slide 8 along the adjusting axis 9 in the direction of the support bearing 26 against the spring force of the compression springs 10, 11 is displaced. Thus, a torque is generated in the direction of the open position.

During this pivoting movement, the first sliding surface 14 of the sliding block 13 slides on the adjusting contour 4 on the one hand. Furthermore, the second sliding surface 15 of the sliding shoe 13 slides on the support surface 12 of the adjusting slide 8 from. The frictional force can be influenced by the combination of materials between the successive sliding surfaces. The torque characteristic over the pivoting can be varied by the eccentricity of the control contour 4 to the pivot axis 3 and by the angle of the support surface 12 relative to the adjusting axis 9.

After reaching an intermediate position which is arranged between the open position and the closed position, the distance between the contact region of the first sliding surface 14 of the sliding block 13 at the adjusting contour 4 and the pivot axis 3 decreases again, so that a torque is generated in the direction of the closed position, because of this pivoting range of the control slide 8 again in the direction of the Swivel axis 3 is moved and is supported by the compression springs 10, 11. The pivoting range between the intermediate position and the closed position is usually relatively small, so that only in the last pivoting range shortly before reaching the closed position, a tightening torque is achieved, so that the lid is securely held in the closed position.

LIST OF REFERENCE NUMBERS

1

first arm

2

second arm

3

swivel axis

4

setting contour

5

central axis

6

casing

7

inner space

8th

lock slider

9

adjusting axis

10

compression spring

11

compression spring

12

support surface

13

shoe

14

first sliding surface

15

second sliding surface

16

surface

17

bead

18

groove

19

first guide surface

20

second guide surface

21

guide wall

22

hinge pins

23

Blind hole

24

Blind hole

25

hole bottom

26

support bearings

27

mandrel

28

mandrel

29

abutment

30

storage area

31

axis of rotation

32

latching depression

33

catch projection

34

Allen Profile

35

drilling

37

end stop

Claims (10)

1. A lid stay particularly for furniture, comprising
   a first arm (1) and a second arm (2) which are connected to one another so as to be pivotable around a pivot axis (3) between an open position and a closed position;
   a convex setting contour (4) which is provided at the first arm (1), which extends around a central axis (5) arranged parallel to the pivot axis (3) and which, if viewed in a section extending perpendicularly to the central axis (5), is circular-arc-shaped;
   a setting slide (8) which is guided by the first arm (1) so as to be displaceable around a setting axis (9), which comprises a planar supporting face (12) directed towards the setting contour (4) and which is spring-loaded towards the setting contour (4),
   characterised by
   a sliding block (13) which, by means of a concave first sliding face (14), is in sliding contact with the setting contour (4) and which, by means of a planar second sliding face (15), is in sliding contact with the supporting face (12), wherein the first sliding face (14) extends in a circular-arc-shaped way around the central axis (5) and comprises the same curvature as the setting contour (4).
2. A lid stay according to claim 1,
   characterised in
   that the first arm (1) comprises an axially projecting bead (17) which extends along the setting contour (4) and which engages a correspondingly shaped groove (18) of the sliding block (13), wherein the groove (18) forms the first sliding face (14).
3. A lid stay according to any one of claims 1 or 2,
   characterised in
   that the radial distance between the setting contour (4) and the pivot axis (3) in the region of contact between the sliding block (13) and the setting contour (4), decreases towards the open position at least along a first part of the pivot path, starting from an intermediate position of the two arms (1, 2,) relative to one another, which intermediate position is arranged between the open position and the closed position.
4. A lid stay according to claim 3,
   characterised in
   that the radial distance between the setting contour (4) and the pivot axis (3) in the region of contact between the sliding block (13) and the setting contour (4) increases towards the intermediate position along a second part of the pivot path, starting from the closed position of the two arms (1, 2) relative to one another.
5. A lid stay according to any one of claims 1 to 4,
   characterised in
   that the supporting face (12) is arranged transversely to the setting axis (9), wherein the setting axis (9) is arranged so as to deviate from a perpendicular line to the supporting face (12).
6. A lid stay according to any one of claims 1 to 5,
   characterised in
   that there is provided a supporting bearing (26) which is held at a variable distance from the pivot axis (3) and that there are provided pressure springs (10, 11) which are supported against the setting slide (8) on the one hand and against the supporting bearing (26) on the other hand.
7. A lid stay according to claim 6,
   characterised in
   that the supporting bearing (26) is supported against a bearing face (30) of an abutment (29) which is supported so as to be rotatable around an axis of rotation (31), wherein the bearing face (30), in the circumferential direction, comprises a variable distance from the axis of rotation (31).
8. A lid stay according to claim 7,
   characterised in
   that the bearing face (30) is shaped so as to be helical.
9. A lid stay according to any one of claims 1 to 8,
   characterised in
   that the arms (1, 2), each at a free end facing away from the pivot axis (3), comprise connecting means (35, 36) for connecting the respective arm to a cover or body of a piece of furniture.
10. A lid stay according to claims 6 and 9,
    characterised in
    that the supporting bearing (26) comprises a bore (35) which extends parallel to the pivot axis (3) and which constitutes the connecting means of the second arm (2).

Images