EA015223B1 - Hinge for oven doors or the like - Google Patents

Abstract

A hinge for doors of ovens or the like, of the type which comprises: - a first elongated arm (13), to be fixed to the structure of the door (12) of the oven (11); - a second arm (14), which is pivoted to the first arm (13) and is designed to be fixed to the structure of the oven (11); - a mechanism (16) which is adapted to manage the relative angular position of the first arm (13) on the second arm (14). The second arm (14) has an internal space (19) which is open upward. The mechanism (16) is constituted by: - a slider (28) which can perform a translational motion substantially in the longitudinal direction of the first arm (13) by association with guiding means (29) formed on the first arm (13); - a linkage (32) which is pivoted respectively to the second arm (14) and to the slider (28); - an intermediate body (34), which is pivoted to the slider (28) on the same axis on which the linkage (32) is pivoted to the slider (28); - elastic elements (39), which are rigidly coupled to the first arm (13) and act by traction on the intermediate body (34).

Description

FIELD OF THE INVENTION

The present invention relates to a hinge for oven doors or similar devices.

State of the art

In the production of hinges for ovens or other similar devices, one of the main problems is related to the complexity of the design of these hinges, which has an inevitable effect on the cost of production.

Hinges for oven doors or other similar devices mainly consist of the first arm attached to the door to close the oven chamber, and the second arm, which is pivotally connected to the first arm in some way and is intended to be attached to the structure of the oven.

The mechanism (usually also containing a spring with a high modulus of elasticity) is located between the first shoulder and the second shoulder and is able to provide rotation of the first shoulder on the second shoulder in accordance with the adjustable movement, providing a stable equilibrium position for the door when it closes on the oven chamber and when it is open, as well as in intermediate positions.

The mechanism that controls the relative movement of the two shoulders of the loop, as a rule, is very complex, because it consists of many components, some of which have a complex geometric shape.

This complexity of the design of the loops has a significant negative impact on the cost of production in terms of the cost of performing the individual components, in terms of the cost of the equipment for making such components and in terms of the cost of assembly.

It should be noted that, with respect to assembly, known loops generally have a drawback.

This drawback is due to the fact that the spring of the hinge mechanism, which, as said, has a high modulus of elasticity, tends to keep the first shoulder closed on the second shoulder (usually at an angle of about 90 °) in order to match the configuration of the door closed on oven chamber.

During the assembly process, such a loop configuration does not allow it to be attached to the oven, since the first shoulder should be tilted relative to the second shoulder by an angle of 90 to 180 ° to ensure easy entry of the end of the head of the second shoulder into the corresponding blocking slot equipped in the oven.

Due to the great effort required to overcome the spring resistance and turn the first shoulder relative to the second shoulder, many manufacturers use specially designed tools to open the hinges during the assembly phase.

Other manufacturers provide the loop with a fork-shaped element that deflects, on the sides of the fork, to the second shoulder, surrounding part of the shoulder.

The fork-shaped element is used as an element to block the rotation of the first shoulder on the second shoulder under the action of the spring, since during the assembly phase it rotates, being placed between the two shoulders.

The blocking element, in addition to increasing the complexity of the design, has the disadvantage of increasing the lateral space occupied by the second shoulder, creating problems with dimensions that are not easy to solve if necessary, try to reduce the dimensions of the loop components (at the same time, of course, maintaining the same mechanical strength )

Disclosure of invention

An object of the present invention is to provide a hinge for oven doors or similar devices that solves the problems noted for known types.

For this purpose, it is an object of the present invention to provide a hinge for oven doors or the like, which has a simple structure.

Another objective of the present invention is the provision of a hinge for oven doors and similar devices, allowing you to simply connect the door to the structure of the oven during assembly.

Another objective of the present invention is the provision of hinges for oven doors and similar devices, which can be manufactured using known inexpensive equipment.

This goal and the indicated and other tasks, which will become clearer from the described below, are achieved by using a hinge for oven doors or similar devices of the type containing the following elements:

the first elongated shoulder for attaching to the structure of the oven door;

a second arm pivotally attached to the aforementioned first arm and intended to be attached to the structure of the oven;

a mechanism for adjusting the relative angular position of the aforementioned first shoulder on the aforementioned second shoulder, characterized in that the aforementioned second shoulder has an inner space open at the top and that the aforementioned mechanism consists of a slider that can move essentially in the longitudinal direction you

- 1 015223 of the indicated first shoulder, being connected to the guiding means made on the above first shoulder;

a link pivotally connected respectively to the aforementioned second shoulder and the aforementioned slider, wherein the aforementioned link is located partially inside the aforementioned space formed in the aforementioned second arm;

an intermediate body pivotally attached to the aforementioned slider on the same axis on which the aforementioned connecting link is pivotally attached to the aforementioned slider, wherein the aforementioned intermediate casing is cam-shaped with a second arm, which is suitable for ensuring a stable balanced position of the aforementioned first arm on the aforementioned second arm which corresponds to the position in which the door is closed on the oven chamber;

an elastic device rigidly connected to the aforementioned first shoulder and acting by tensioning the aforementioned intermediate body.

Brief Description of the Drawings

Additional features and advantages of the invention will become clearer from the following detailed description of its preferred, but not exclusive embodiment, shown as a non-limiting example in the accompanying drawings, in which FIG. 1 is a sectional side view of a hinge according to the invention applied to an oven, illustrating an oven door in an open position;

FIG. 2 is an enlarged view of a fragment of the loop of FIG. 1, in the position where the door closes the oven;

FIG. 3 is an exploded view of a loop in the foregoing figures;

FIG. 4 is a perspective view of a loop in the preceding figures at an intermediate opening stage;

FIG. 5 is a cross-sectional side view of a loop in the preceding figures in an intermediate opening step, with a disc attached to block rotation of the two shoulders of the loop;

FIG. 6 is a cross-sectional side view of a loop, in accordance with the invention, in an intermediate opening step, with another embodiment of means for blocking the mutual rotation of the loop shoulders;

FIG. 7 is a sectional side view of a part of the loop of FIG. 6 in the open position.

The implementation of the invention

It should be noted that everything that is already known during the patenting process should not be regarded as subject to patent protection, and should not be subject to rejection.

With reference to the drawings, the hinge for oven doors, in accordance with the invention, is generally indicated by reference numeral 10.

The structure of the oven is generally indicated by 11, while the oven door is indicated by 12.

The hinge 10 comprises a first elongated shoulder 13 to be fixed to the oven door 12 of the oven 11 (the oven and the door are shown schematically in dashed lines), and a second arm 14 pivotally attached to the first arm 13 to be attached to the structure of the oven 11; the articulation between the first shoulder 13 and the second shoulder 14 is carried out by means of the first rod 15.

Also between the first shoulder 13 and the second shoulder 14 is a mechanism, generally designated 16, capable of adjusting the relative angular position of the first shoulder 13 on the second shoulder 14.

In particular, in accordance with a known type of construction, the first shoulder 13 has an essentially cross-sectional shape forming a longitudinal receiver 17 for components of the mechanism 16.

The second shoulder 14 is pivotally attached to the side walls 18 of the longitudinal receiver 17 and is equipped with an internal space 19, open up.

In particular, the second shoulder 14 consists of two plates 20, which are symmetrical and facing each other, and are connected by a transverse jumper 21.

The plates 20 are made as a whole, for example, in a convenient way by stamping and subsequent folding of the metal sheet into an I-shape.

The contour of each plate 20 has an upper tooth 22, suitable for stopping to prevent exit on the inner front wall 23 of the socket 24, made in the structure of the oven 11, and the lower groove 25, suitable for receiving the lower protrusion 26 of the socket 24.

The contour of each plate 19 also has a rear portion 27 on which the first shoulder 13 is pivotally mounted.

The mechanism 16 comprises a slider 28, which can move essentially in the longitudinal direction of the first shoulder 13, being connected with the guiding means 29 made in the first shoulder 13.

The slider 28 consists of a rod, hereinafter referred to as the second rod 30, the ends of which are guided in parallel grooves 31, which constitute the guiding means 29 and are made symmetrically on the side walls 18 of the receiver 17, equipped in the first shoulder 13.

The mechanism 16 further comprises a plate link 32, pivotally attached

- 20155223 respectively to the second shoulder 14 and to the slider 28.

The slider 28 is partially located inside the space 19, formed by the I-shaped bend of the second shoulder 14, and is pivotally connected to the second shoulder 14 using the third rod, indicated by the reference position 33, which is located so as to pass through the plate 20.

The axis of rotation of the link 32 on the second shoulder 14 is distant upward relative to the axis of rotation of the first shoulder 13 on the second shoulder 14; a straight line, indicated schematically by the letter A in FIG. 2, connecting the centers of rotation of the connecting member 32 on the second arm 14 and the first arm 13 on the second arm 14, belongs to the boundary surface between the door and the oven when the door is closed on the oven chamber.

Moreover, the mechanism 16 includes an intermediate body 34 pivotally attached to the slider 28 on the same axis along which the link 32 is pivotally attached to the slider 28, in practice, on the axis of the second rod 30, which makes the slider 28.

The intermediate housing 34 consists of an I-shaped sheet, between the side wings 35 of which a slider 28 is located.

The intermediate housing 34 further comprises a cam-shaped connection, indicated at 36, with a second arm 14; cam-shaped connection 36 is designed to provide a stable balance position of the first shoulder 13 on the second shoulder 14, which corresponds to the closed position of the door 12 on the oven chamber 11, as shown in FIG. 2.

The cam-shaped connection 36 consists of a roller, generally indicated by reference numeral 37, located so that it can rotate between the side wings 35 of the intermediate housing 34 and is in sliding contact during part of the relative rotation of the first shoulder 13 on the second arm 14, with a pointed portion 38, made on the upper edge of the second shoulder 14.

The location of the roller 37 on the part of the pointed portion 38 directed to the bottom of the receiver 17, made in the first shoulder 13, as shown in FIG. 2, corresponds to the closed position of the door 12 on the oven chamber 11.

Ultimately, the mechanism 16 includes an elastic device 39, which is rigidly connected to the first shoulder 13, acts by tension on the intermediate housing 34.

The elastic device 39 consists of a tension spring 40, which is rigidly connected at its ends, respectively, to the first engagement portion 41, such as a fourth rod lying perpendicular to the side walls 18 of the receiver 17, and to the second engagement portion 42, such as a fifth rod laterally between the side wings 35 of the intermediate housing 34.

The link 32 has, near its axis of hinge attachment to the second arm 14, an elongated tongue 43 designed to abut the lower stop 44, restricting the stroke, for the link 32, when the first arm 13 is rotated to a position corresponding to the fully open position of the door 12 relative to the camera the oven 11, which is clearly shown in FIG. one.

The lower stop 44, restricting the stroke, is made on the second shoulder 14 inside the space 29, formed by an i-shaped fold, and consists, for example, of a sixth rod 45 located so as to pass through at least one of the two plates 20.

When the tab 43 abuts against the lower stop 44, the slider 28 abuts against the lower ends of the walls of the guide grooves 31.

The loop works as follows.

The first shoulder 13 and the second shoulder 14 are rotated relative to each other when the spring 40 pulls the link 32, in practice, acting on the slider 28.

The fact that the axis of rotation of the link 32 on the second arm 14 is removed upward relative to the axis of rotation of the second arm 13 on the second arm 14 in practice forces the spring to exert an eccentric traction force on the second arm 14, which leads to the rotation of the first arm 13 on the second arm 14; the eccentric traction force hypothetically ends when the direction of spring tension is aligned with a straight line A connecting the rotation centers of the link 32 on the second arm 14 and the first arm 13 on the second arm 14.

Since straight line A refers to the surface acting as the interface between the door and the oven when the door is closed on the oven chamber, the above alignment cannot occur; the first shoulder 13 is rotated until the door 12 rests on the surface of the chamber of the oven 11.

To increase security, when the door 12 rests on the surface of the oven chamber 11, the roller 37 is located on the part of the pointed portion 38, which is directed to the bottom of the receiver 17, made in the first shoulder 13, as shown in FIG. 2, increasing the stability of the closed position of the door.

The door 12 opens simply by turning it down; the mechanism 16 has such a structure that the door 12, taking into account its center of gravity, is always balanced in any angular position between the pointed portion 38 and the fully open position, which corresponds to the stop of the tongue 43 on the lower stop 44 of the stroke limit and on the stop of the slider 28 on the lower guide ends

- 3 015 223 grooves 31.

Preferably, the loop 10 comprises means 46 for angularly blocking the rotation of the first arm 13 on the second arm 14 in an angular position, allowing the second arm 14 to be secured to the structure of the oven 11 (FIG. 5).

This angular position corresponds to a rotation position that is intermediate between the position in which the door is closed on the oven chamber (as in FIG. 2) and the position corresponding to the maximum opening of the door (FIG. 1).

The corner locking means 46 comprise a locking element 47 (shown by the dotted line in FIG. 5), which can be placed under pressure due to the indirect action of the traction of the elastic device 39 between the first stop 48 made on the first shoulder 13 and the second stop 49 located inside the space 19 formed by the I-shaped bend of the second shoulder 14.

In particular, the locking element 47 consists of a disk, which can be partially placed inside the groove 50 to open upward the space 19 formed by the I-shaped fold of the second shoulder 14; in sectional views, a groove 50 is shown with reference to its longitudinal face.

The disk is placed in the groove 50 by a lateral stop as at the first stop 48, corresponding to the base of the slot 51 made at the end of the first shoulder 13, to allow the front section of the second shoulder 14 to exit from the receiver 17 made in the first shoulder 13, and to the second stop 49 , consisting of a tongue 52, which is made integrally with the face of one of the two plates 20 and is folded at right angles to it.

Additionally, the aforementioned disk constituting the blocking member 47 is supported by a lower support 53 formed within the space 19 and constituting the upper part of the sixth rod providing a lower travel stop.

The disk, which can conveniently be a coin of a suitable diameter, can thus be easily inserted into and removed from the groove 50.

Another embodiment of the corner locking means shown in FIG. 6 and 7 and denoted by reference numeral 146, comprises a blocking element 147 designed to be placed under pressure when indirectly acting on the thrust of the elastic device 39 between the first stop 148 made on the first shoulder 13 and the second stop 149 made inside the space 19 formed by shaped fold of the second shoulder 14.

In this embodiment, the locking element 147 consists of a lever 154, which is pivotally attached to the second shoulder 14 and partially contained in the groove 50 for opening from above the space 19 formed by the I-shaped fold of the second shoulder 14.

The end 155 of the lever, lying opposite the end for hinging to the second shoulder 14, rests, during the blocking stage, on the first stop 148.

In particular, the second stop 149 consists of a rod for turning the lever 154, while the first stop 148 consists of a base of the slot 51 made at the end of the first shoulder 13 to allow the front portion of the second shoulder 14 to protrude from the receiver 17 made in the first shoulder thirteen.

The width of the end 155 of the lever 154 is greater than the width of the groove 50, for example, by laterally folding the end 155 to avoid the complete placement of the lever 154 in the groove 50.

In FIG. 7 shows the position of the lever after attaching the hinge to the oven 11.

In practice, it turned out that the described invention solves the problems encountered with known types of oven hinges.

In particular, the present invention provides a hinge for oven doors or the like, which has a simplified construction with respect to known types of hinges, since the number of its components is minimized.

The shape of the components is also simple, and these components, essentially all, can be obtained by stamping and bending metal plates.

Moreover, the use of blocking means for angular locking of the relative rotation of two shoulders of an extremely simple type, for example, such as a coin, can significantly simplify the step of attaching the indicated hinge to the oven.

An embodiment of said angular locking means comprising a lever repeats the already known construction; the use of a separate lever enclosed between the plates forming the second shoulder is structurally simple and leads to small overall dimensions.

It is contemplated that the present invention may be subject to numerous modifications and changes, all of which are within the scope of the appended claims; all parts can additionally be replaced with technically equivalent elements.

In practice, the materials used, provided that they are compatible with the particular application, as well as the dimensions, can be any in accordance with the requirements and the existing level of technology.

Descriptions of Italian Patent Application No. 2006-200000034, the priority of which this application claims, are hereby incorporated by reference.

- 4 015223

If the technical features mentioned in any claim are followed by reference numbers, these reference positions are included only to facilitate understanding of the claims, and accordingly, such reference positions do not impose restrictions on the interpretation of each element indicated by way of example with such a reference position.

Claims (14)

CLAIM 1. A hinge for the door of the device (11) of the oven type, containing the first extended arm (13) to be fixed to the door (12) of the specified device; the second shoulder (14), hinged to the first shoulder (13) and intended for attachment to the specified device (11); a mechanism (16) capable of adjusting the relative angular position of the first arm (13) on the second arm (14); characterized in that the second shoulder (14) has an inner space (19) open at the top, and the mechanism (16) consists of a slide (28) that can move essentially in the longitudinal direction of the first shoulder (13) being connected with guiding means (29) performed on the first shoulder (13); a link (32), hinged respectively to the second shoulder (14) and to the slider (28), while the link (32) is located partially within the above space (19); intermediate housing (34), pivotally attached to the slider (28) on the same axis, on which the link (32) is pivotally attached to the slider (28), while the intermediate case (34) has a cam-shaped connection (36) with the second shoulder ( 14), capable of providing a stable balanced position of the first shoulder (13) on the second shoulder (14), corresponding to the position in which the door (12) is closed; an elastic device (39) connected to the first shoulder (13) and capable of acting by tension on the intermediate body (34). 2. The loop according to any of the preceding paragraphs, characterized in that the first shoulder (13) has a substantially C-shaped cross-section, and made with the possibility of forming in this shoulder (13) a longitudinal receiver (17) for the components of the mechanism (16 ), while the second shoulder (14) is pivotally attached to the side walls (18) of the receiver (17), the slider (28) is a rod (30), the ends of which are placed in parallel guide grooves (31), the walls of which form the above guiding means (29) and performed symmetrically on the above sides x walls (18), and the intermediate body (34) is ϋ-shaped, with a rod (30) located between the side wings (35). 3. The loop according to claim 2, characterized in that the above cam-shaped connection (36) consists of a roller (37), which is placed rotatably between the above-mentioned side wings (35) and, with a partial relative rotation of the first arm (13) relative to the second shoulder (14), is in sliding contact with the pointed section (38), made on the upper edge of the second shoulder (14), while the roller (37) is located on that part of the above pointed section (38), which is directed to the bottom of the receiver (17 ) corresponds to the position in which two ka (12) is closed. 4. The loop according to any one of the preceding paragraphs, characterized in that the second shoulder (14) consists of two symmetric plates (20), which face each other and are connected by at least one transverse bridge (21), while the plates (20) made as a single element, folded and-shaped with the formation of the above space (19). 5. The loop according to any one of paragraphs.2-4, characterized in that the connecting link (32) contains near the axis of its swivel with the second shoulder (14), extending tongue (43), which serves to rely on the lower stop (44) restrictions stroke, which is designed to limit the progress of the link (32) when the first arm (13) rotates to the position corresponding to the fully open position of the door (12), while the lower stop (44) of the stroke limiter is made on the second arm (14) inside the above space (19), when the above tongue (43) is based on the lower limit (44) limiting the stroke, and the slider (28) rests on lower ends of the walls above the guide grooves (31). 6. The loop according to any of the preceding paragraphs, characterized in that the above-mentioned elastic device (39) consists of a tension spring (40), which is connected at its ends, respectively, with the first engagement section (41) located transversely to the side walls (18) of the receiver ( 17) and with the second section (42) of the engagement made on the intermediate casing (34). 7. The loop according to any of the preceding paragraphs, characterized in that the axis of rotation of the connecting link (32) on the second shoulder (14) is removed upwards from the axis of rotation of the first shoulder (13) relative to the second shoulder (14) so that the straight line (A) connecting the center of rotation of the connecting element (32) on the above first shoulder (14) and the center of rotation of the first shoulder (13) on the second shoulder (14), is located on - 5 015223 of the surface forming the interface between the door (12) and the indicated device (11) when the door (12) is closed. 8. Loop according to claim 7, characterized in that it comprises means (46, 146) for angularly blocking the rotation of the first arm (13) on the second arm (14) in an angular position suitable for fastening the second arm (14) to the oven (11), while the above-mentioned blocking means (46, 146) contains a blocking element (47, 147), designed to be placed between the first stop element (48, 148), which is formed on the first shoulder (13), and the second stop element ( 49, 149), lying inside the above space (19), and for fixing the door (12) in a given ajar position and under the influence of her efforts, developed by an elastic device (39). 9. The loop of claim 8, characterized in that the blocking element (47) is a disk that can be partially placed in the upper part (50) of the above space (19) and is removed from the loop from it (10). 10. The loop according to claim 9, characterized in that it has a lower support (53) for the disk, which is hinged on the second shoulder (14) inside the above space (19). 11. The loop according to claim 3 or 4, characterized in that the first thrust element (48) is the base of the slot (51) made at the end of the first shoulder (13) and serving to allow the front section of the above second shoulder to exit (14) from the receiver (17) made in the first shoulder (13), the second thrust element (49) is a tongue (52), which is made in one piece with the second shoulder (14) and lies in the above space (19). 12. The loop according to claim 2, characterized in that the blocking element (147) consists of a lever (154), which is pivotally connected to the second shoulder (14) by a first end and partially placed in the upper part (50) of the above space (19), and the second end (155) of the lever (154) is able to rely on the first stop element (148) when locking. 13. The loop indicated in paragraph 12, characterized in that the second end (155) of the lever (154) has a width greater than the width of the upper part (50) of the above space (19). 14. The loop according to claim 6 or 7, characterized in that the second thrust element (149) is a hinge element by means of which the lever (154) is connected to the second arm (14), while the first thrust element (148) represents is the base of the slot (51), made at the end of the first shoulder (13) and serves to allow the front section of the second shoulder (14) to exit the receiver (17).