FR3120098A1 - Display Fixture Kit - Google Patents

Abstract

Assembly for fixing a display device The assembly for fixing a display device comprising a screen (2) and a support (4), comprises at least a first orifice (16) integral with the support, a second orifice (18) integral with the screen (2), extending opposite the first orifice (16), and a fixing device (20) comprising a female fixing piece (26), inserted into the first orifice (16 ) and in the second orifice (18), and a male fastener (28), introduced into the female fastener (26). The female fixing part (26) comprises a body for receiving the male fixing part (28), said receiving body comprising at least one holding lug (30) movable between a mounting position and a locking position, in which the retaining tab (30) immobilizes the fixing device (20). Figure for abstract: 2

Description

Display Fixture Kit

The present invention relates to an assembly for fixing a display device comprising a screen and a support, comprising at least a first orifice fixed to the support, a second orifice fixed to the screen, extending opposite the first orifice, and a fixing device comprising a female fixing part, introduced into the first orifice and into the second orifice, and a male fixing part, introduced into the female fixing part.

The invention also relates to a display device, a screen of which is fixed to a support by such a fixing assembly.

In a display device, for example intended for the passenger compartment of a vehicle, it is known to fix the screen, or the panel, to a support carrying a lens, forming the display surface of the device. display, and to ensure the fixing of the screen to the lens and the transmission of light by an optical glue. The optical adhesive is for example activated and/or polymerized by heat, by ultraviolet radiation or after a certain period of time. During this polymerization operation, the screen must be stationary in relation to the lens and therefore in relation to the support in all directions. The screen must therefore be firmly fixed to the support. Such a firm and reversible fixing is for example obtained by screwing the screen onto the support. However, such fixation also puts significant stress on the screen, which can lead to defects in the display of images. Thus, such constraints are for example likely to generate a Mura effect on the display surface, thus degrading the quality of the images displayed.

To avoid these undesirable effects, a flexible attachment has been proposed, in which adhesive elements ensure the adhesion of the screen to the support. However, the assembly is then not reversible.

One of the aims of the invention is to propose an assembly for fixing a screen on a support ensuring reliable immobilization of the screen on the support in a reversible manner and not applying any stress likely to generate defects in display on the display surface of the display device.

To this end, the invention relates to a fixing assembly of the aforementioned type, in which the female fixing part comprises a body for receiving the male fixing part, said receiving body comprising at least one holding lug movable between a position mounting, in which the female fixing part is movable in the first and second orifices before the insertion of the male fixing part in the receiving body, and a blocking position, in which the holding lug is applied against a wall of the first orifice or of the second orifice and immobilizes the fixing device in the first and second orifices when the male fastener is inserted into the receiving body.

The fixing device of the fixing assembly according to the invention makes it possible to effectively block the screen on the support and in particular to prevent a modification of the position of the screen relative to the support, without however applying constraints on the screen. Indeed, these stresses are absorbed between the female fixing part and the male fixing part. Thus, the quality of the display on the display surface is preserved. In addition, by reducing the stresses applied to the screen, the risks of delamination of the optical bonding between the screen and the lens are reduced.

The fastening assembly according to the invention may comprise one or more of the following characteristics, considered alone or in any technically possible combination:

- the male fastener comprises an actuating rod, said actuating rod being received in the receiving body of the female fastener and moving the retaining lug from the mounting position to the locking position during the inserting the actuating rod into the receiving body;

- the retaining lug defines with the receiving body an opening for receiving the actuating rod, said receiving opening comprising at least one part having, in the mounting position, a diameter smaller than that of the actuating rod ;

- the receiving body comprises a plurality of retaining lugs extending around the actuating rod of the male fastener in the locking position, the actuating rod moving each retaining lug from the mounting position to the blocking position when inserting the actuating rod into the receiving body;

- the second orifice has a diameter greater than the diameter of the first orifice, the body for receiving the female fastener comprising at least one blocking part of an outer diameter substantially equal to that of the first orifice, the said blocking part being applied in force against a wall of the first orifice in the blocking position;

- the female fixing part comprises a blocking surface, said blocking surface being applied against an edge of the second orifice, opposite the first orifice;

- the male fastener comprises at least one locking lug, said locking lug being applied against an edge of the second orifice, opposite the locking surface, the edges of the second orifice being retained against the support between the surface lock and the lock tab;

- the fixing assembly comprises a plurality of pairs of first and second orifices, each pair of first and second orifices receiving a fixing device.

According to another aspect, the invention also relates to a display device comprising at least one screen and one support, said screen being fixed to the support by a fixing assembly as described above.

The display device according to the invention may further comprise the characteristic that the second orifice extends into an interface part fixed to the screen, said interface part being fixed to the support by at least one fixation.

Other aspects and advantages of the invention will appear on reading the following description, given by way of example and made with reference to the appended drawings, in which:

- there is a schematic representation of the back of a display device comprising a fixing assembly according to the invention,

- there is a schematic representation in exploded perspective of a fastening assembly according to the invention, and

- there is a schematic representation in perspective of a fastening device of the fastening assembly of the in the blocking position.

With reference to the , a display device 1 is described, comprising a screen 2 and a support 4, fixed to one another by a fixing assembly. Such a display device 1 is for example intended to be mounted in the passenger compartment of a vehicle, so as to display information related to the state of the vehicle and/or to its driving and/or to display audiovisual content . The display device 1 is for example mounted on a trim element of the passenger compartment, such as a dashboard, a door panel, a central console, a seat, an armrest or the like. Although this is not shown, the display device may further comprise a lens forming the display surface of the display device and protecting the screen 2, the lens extending on the support 4 facing the screen 2, an optical adhesive ensuring the fixing of the lens on the screen 2 and the transmission of light without disturbance between the screen 2 and the lens.

The screen 2 comprises a body 6 delimited by a front face (not shown) extending opposite the lens and forming the image-emitting surface of the screen 2, and by a rear face 8 opposite the front face , the front face and the rear face being connected by side edges 10 of the screen 2, defining the outline of the screen 2. The interior volume of the body 6 comprises the elements necessary for the display of images on the surface display, such as a light source and electronic components. At least one connection element (not shown) allowing the power supply of the electronic components and/or the passage of control signals and/or data is for example additionally provided and opens outside the interior volume, for example on the rear face 8 of the body 6. The rear face 8 is for example further provided with screw barrels allowing, according to one embodiment, the screwing of an interface part 12 on the screen 2, as will be described in more detail later. As a variant, the interface piece 12 is for example fixed by riveting to the screen 2. The invention applies to any type of screen 2, such as an LCD screen (for "Liquid Crystal Display", screen liquid crystal in French) or OLED (for “Organic Light-Emitting Diodes”, organic light-emitting diodes in French).

According to one embodiment, the screen 2 is a touch screen making it possible to control functions of the display device 1 and/or of the vehicle in which the display device 1 is mounted by digital contact with the display surface. To do this, a capacitive film is for example applied to the front face of the screen 2 and/or to the rear face of the lens.

The support 4 is arranged to receive the screen 2 and to provide the interface between the screen 2 and the lens and between the display device 1 and the environment of the display device 1 in the vehicle. In other words, the support 4 receiving the screen 2 is mounted on the trim element receiving the display device 1, for example in an opening of the trim element provided for this purpose.

The support 4 has for example the shape of a frame. The frame defines an opening having a shape substantially complementary to the contour of the body 6 of the screen 2 and receiving the screen 2. Thus, the support 4 comprises one or more branches 14 delimiting the opening of the frame and each applied against an edge side 10 of body 6 of screen 2.

The screen 2 is fixed to the support 4 by a fixing assembly, more particularly visible on the , comprising at least a first orifice 16, a second orifice 18 and a fixing device 20.

The first orifice 16 is secured to the support 4. By "secured to the support", it is meant that the first orifice 16 is made in a part of the support 4. Thus, the first orifice 16 is for example made in one of the branches 14 of the frame forming the support 4. The orifice 16 opens for example in a rear face of the branch 14, substantially parallel to the rear face 8 of the body 6 of the screen and opposite to the front face of the branch 14 which receives the lens of the display device. The first orifice 16 extends in a direction substantially parallel to the direction going from the rear face to the front face of the body 6 of the screen, that is to say the direction of the thickness of the screen 2 The first orifice 16 is delimited by a wall extending into the branch 14 from the face into which the first orifice 16 opens. As a variant, the wall of the first orifice 16 has a section of ovoid or elliptical shape and the first diameter then corresponds to the largest dimension of the section. It is understood that the first orifice could open out into the front face of the branch 14, but making it in the rear face makes it possible to simply hide the assembly for fixing the display device 1 when the latter is mounted on an element of filling.

According to the embodiment shown in the , each branch 14 of the frame comprises at least one first orifice 16. In the case of a body 6 and a frame 14 of substantially rectangular shape, as shown in the , the branches 14 extending along the length of the frame comprise for example two first orifices 16 and the branches 14 extending along the width comprise for example a first orifice 16. The number of first orifices 16 depends more generally on the dimensions of the 'screen 2 and the frame and is chosen to ensure attachment of the screen 2 to the support 4 to effectively immobilize the screen 2 relative to the support 4 in all directions. In other words, the larger the screen, the more first 16 holes there are.

The second orifice 18 is integral with the screen 2. By integral with the screen 2, it is meant that the second orifice 18 is formed in the body 6 of the screen 2, for example in a fixing lug extending in periphery of the body 6, or in a part fixed to the body of the screen 6 and immobile relative to the latter, such as an interface part 12, as shown in Figs. 1 and 2.

The interface part 12 is for example formed by a plurality of ridges 22 extending against the rear face 8 of the body 6 of the screen 2 and comprising at least one end extending projecting from the body 6 facing a branch 14 of the frame. By edge 22 is meant any elongated element, having for example the shape of a bar, a rod or the like. According to the embodiment shown in the , each edge 22 extends from one branch 14 of the frame to an opposite branch 14 of the frame and each end of the edge 22 extends opposite a first orifice 16 of a branch 14. Screws 24 pass through for example the interface part 12 and are screwed into screwing barrels provided on the rear face 8 of the body 6 of the screen 2 to fix the interface part 12 on the screen 2. The interface part 12 can be formed in one piece or comprise several distinct edges. The number and the shape of the edges can vary according to the dimensions and the shape of the screen 6 and of the support 4. Alternatively, the interface piece 12 has a different shape as long as it comprises a part extending opposite each first orifice 16 of the support 4. Thus, according to a variant, the interface part 12 can cover the entire rear face of the screen 2.

The second orifice 18 is formed in the interface part 12 or in the body 6 of the screen 2 facing each first orifice 16 of the support 4. The rest of the description will be made with reference to a second orifice 18 practiced in an interface piece 12, but it is understood that it also applies to a second orifice 18 made directly in the body 6 of the screen 2.

The second orifice 18 passes through the interface part 12 and extends facing a first orifice 16 so that an element passing through the second orifice 18 can be introduced into the first orifice 16. The second orifice 18 is extends in a direction substantially parallel to the axis of the first orifice 16. The second orifice 18 is delimited by a wall extending in the interface part 12, more particularly in an edge 22, and emerging in the two faces of the interface piece 12, more particularly edge 22. The wall of the second orifice 18 has for example a substantially circular section having a second diameter. As a variant, the wall of the second orifice 18 has a section of ovoid or elliptical shape and the second diameter then corresponds to the largest dimension of the section. According to one embodiment, the second diameter is greater than the first diameter.

The fixing device 20 comprises a female fixing part 26 and a male fixing part 28 and is introduced into the first and second orifices 16, 18 to fix the screen 2 to the support 4.

The female fixing part 26 comprises a body for receiving the male fixing part 28 comprising at least one holding lug 30 that is movable relative to the rest of the receiving body between a mounting position and a locking position. The retaining tab 30 extends for example from a head 32 and passes through the second orifice 18 and extends into the first orifice 16 when the fixing device 20 is introduced into the first and second orifices 16, 18 According to the embodiment shown in the figures, the receiving body comprises a plurality of holding lugs 30, for example two as shown in Figs. 2 and 3, which form the part of the receiving body extending into the first and second orifices 16, 18. The head 32 extends for its part outside the first and second orifices 16, 18 and forms a surface blocking surface extending over the edge of the second orifice 18, opposite the first orifice 16. In other words, the blocking surface is applied around the second orifice 18, on the face of the edge 22 which is opposite the face of the edge 22 which is applied against the branch 14.

The retaining lug(s) 30 therefore extend from the projecting blocking surface in a direction substantially parallel to the axes of the first and second orifices 16, 18.

The receiving body comprises at least one blocking part 34 having a diameter substantially equal to the first diameter, or slightly less than the latter, this blocking part 34 extending into the first orifice 16 when the fixing device 20 is inserted. in the first and second orifices 16, 18. Thus, the blocking part 34 is formed on the retaining lugs 30, for example in the vicinity of the free ends thereof opposite the head 32. Thus, when the female fastener 26 is mounted in the first and second holes 16, 18 without the male fastener 28, the female fastener 26 is held in the first hole 16 by the application of the locking part 34 against the at least part of the wall of the first orifice 16, this application only allowing extraction of the female fastener 26 from the first and second orifices 16, 18 in the direction of the axis of the first and second orifices 16, 18 and, possibly, a slight play in the directions perpendicular to this direction. In the mounting position, when the male fixing part is not received in the female fixing part 26, the latter is therefore movable in the first and second orifices 16, 18.

Between the blocking surface and the blocking part 34, the receiving body has for example a diameter smaller than the first diameter in order to limit the friction with the wall of the first orifice 16 and to facilitate the insertion and the extraction of the workpiece. female attachment 26 in and out of the first and second orifices 16, 18. According to the embodiment shown in Figs. 2 and 3, the locking part 34 has a substantially frustoconical shape with a diameter decreasing from the part having the diameter substantially equal to the first diameter to the free end of the retaining tabs 30.

Each retaining lug 30 is elastically deformable with respect to the head 32 between the mounting position and the locking position, as will be explained in more detail later. Alternatively, only one retaining tab 30 can be deformable, the receiving body then comprising a rigid part extending opposite the retaining tab 30.

The body for receiving the female fastener 26 defines a receiving opening 36 passing through the female fastener 26 in the direction of the axis of the first and second orifices 16, 18. Thus, the receiving opening 36 is extends through the head 32 and extends between the retaining tabs 30 or between the retaining tab 30 and the rigid part.

The male fastener 28 is introduced into the female fastener 26 so as to move the retaining lug(s) 30 during this introduction from the mounting position occupied when the male fastener 28 is not introduced. in the female fastener 26, in the locking position, when the male fastener 28 is inserted into the female fastener 26.

For this purpose, the male fastener 28 comprises an actuating rod 38 arranged to be introduced into the receiving opening 36 of the female fastener 26 and to move the retaining lug(s) 30 from the mounting position. to the blocking position during this introduction. To do this, the retaining tab or tabs 30 delimit at least a part of the receiving opening 36 which has a diameter smaller than that of the actuating rod 38 when the male fastener 28 is not received by the female fixing part 26. Thus, by introducing the actuating rod 38 into the receiving opening 36, the actuating rod spreads the retaining lug(s) 30 when it reaches the part of the opening having a diameter smaller than that of the actuating rod 38 and moves the retaining tab(s) 30 into the locking position. In this position, the blocking part 34 carried by the retaining tab(s) 30 is crushed, that is to say applied by force, against the wall of the first orifice 16 and blocks any movement of the fixing device 20 in the first and second orifices 16, 18 in all directions. The part of diameter smaller than that of the actuating rod of the receiving housing 36 extends for example facing the blocking part 34 in the vicinity of the free end of the retaining lug(s) 30. Thus, the insertion of the actuating rod 38 into the receiving housing 36 takes place without resistance up to this part, which facilitates the mounting of the fixing device 20 in the first and second orifices 16, 18. Alternatively, the entire part of the receiving housing 36 extending opposite the retaining lug(s) 30 has a smaller diameter than that of the actuating rod 38 when the male fastener is not received in the female fastener, that is to say in the mounting position.

According to one embodiment, the part of the receiving housing 36 having a diameter smaller than that of the actuating rod 38 also has a frustoconical shape with a diameter decreasing towards the free end of the retaining lug(s) 30 of so that the female fastener 26 tends to push the male fastener 28 out of the receiving housing 36.

According to one embodiment, the male fixing part 28 comprises at least one locking lug 40 arranged to be applied against an edge of the second orifice 18 on the face of the interface part 12 opposite the face on which the blocking surface of the female fastener 26 when the male fastener 28 is received in the female fastener 26 and when the fastener 20 is introduced into the first and second orifices 16, 18. In other words , the edges of the second orifice 18 extend between the blocking surface and the blocking lug 40 when the fastening device 20 fixes the screen 2 to the support 4. The interface piece 12 is thus blocked between the blocking surface of the female fastener 26 and the locking lug 40 of the male fastener 28 in the direction of extraction of the fastener 20 from the first and second orifices 16, 18. This blocking is reinforced when the fastener m ale 28 is pushed by the female fastener 26 out of the receiving housing 36, as described above.

The locking lug 40 extends, for example, projecting from the actuating rod 38 and is elastically deformable in order to be able to pass through the second orifice 18 during the introduction of the male fastener 28 into the female fastener 26 and in the second orifice 18 and to regain its initial shape once the locking lug 40 extends beyond the second orifice 18 so as to bear against the edge of the second orifice 18. According to the embodiment shown in Figs. 2 and 3, the male fixing piece 28 comprises two locking lugs 40 extending on either side of the actuating rod 38.

The description above has been made for an embodiment in which the female fastener 26 is force-locked against the wall of the first orifice 16. It is however understood that, as a variant or in addition, the invention could also be 'apply to a locking force against the wall of the second hole 18 by adapting the shape of the female fastener 26 for this purpose.

When several pairs of first and second orifices are provided, each pair receives a fixing device 20 as described above.

When mounting the screen 2 on the support 4, the screen 2 is positioned on the support 4, for example by a robot, so as to place the second orifice(s) 18 facing the first orifices 16. This positioning can be quite coarse when the second diameter(s) are greater than the first diameter(s). According to one embodiment, a lens is fixed on the support 4 before the positioning of the screen 2 on the support 4 and an optical adhesive is applied to the screen 2 or to the lens so that the optical adhesive extends between the screen 2 and the lens when the screen 4 is positioned by the robot on the support 4. Alternatively, the fixing of the lens on the support 4 can be done once the screen 2 has been mounted on the support 4, in which case the application of the optical glue can be done before or after the mounting of the screen 2 on the support 4.

Once the screen 2 is positioned on the support 4, a female fastener 26 is introduced into each pair of first and second orifices 16, 18 until the head blocking surface 32 is applied to the edge of the second orifice 18. This introduction makes it possible to definitively position the screen 2 on the support 2, the female fixing part 26 being fitted in the first orifice 16 in the assembly position. A male fastener 28 is then introduced into each female fastener 26. The insertion is such that the retaining lug(s) 30 of each female fastener 26 pass from the mounting position to the locking position, in which the fixing device 20 is held in force in each pair of first and second orifices 16, 18. The insertion of the male fixing part 28 into the female fixing part 26 is done by snap-fastening or clipping when the fixing part male includes at least one locking tab 40, as described above.

The fixing assembly above makes it possible to firmly fix the screen 2 on the support 4 in a simple manner and without applying significant stress to the screen. Indeed, the stresses due to the fixing of the screen 2 on the support 4 are absorbed between the female 26 and male 28 fixing parts. Thus, the fixing of the screen 2 on the support 4 is not likely to cause display defects, including an unwanted Mura effect. Fixing the screen 2 on the support 4 makes it possible to immobilize the screen 2 with respect to the support 4 in all directions without requiring any additional holding tool. Thus, the orientation of the screen 2 is maintained, in particular with respect to a lens mounted on the support 4 and in particular while an optical adhesive polymerizes between the screen 2 and the lens. Consequently, the robot does not need to be mobilized to keep the screen 2 fixed relative to the support 4 during this polymerization. Thus, the robot can be used more optimally, for example for mounting another display device once it has been used to position the screen 2 on the support 4 and the fixing device 20 has been set up.

Claims (10)

Assembly for fixing a display device comprising a screen (2) and a support (4), comprising at least a first orifice (16) secured to the support, a second orifice (18) secured to the screen (2) , extending opposite the first orifice (16), and a fixing device (20) comprising a female fixing piece (26), introduced into the first orifice (16) and into the second orifice (18), and a male fastener (28), introduced into the female fastener (26), characterized in that the female fastener (26) comprises a body for receiving the male fastener (28), said receiving body comprising at least one holding tab (30) movable between a mounting position, in which the female fastener (26) is movable in the first and second holes (16, 18) before insertion of the male fastener (28) in the receiving body, and a blocking position, in which the holding tab (30) is applied against a wall of the first hole (16) or the second hole (18) and secures the fastener (20) in the first and second holes (16, 18) when the male fastener (28) is inserted into the body reception. A fastener assembly according to claim 1, wherein the male fastener (28) comprises an actuating rod (38), said actuating rod (38) being received in the receiving body of the female fastener ( 26) and moving the retaining tab (30) from the mounting position to the locking position when inserting the actuating rod (38) into the receiving body. Fixing assembly according to Claim 2, in which the retaining tab (30) defines with the receiving body a receiving opening (36) of the actuating rod (38), the said receiving opening (36) comprising at least a part having, in the mounting position, a diameter smaller than that of the actuating rod (38). A fastener assembly according to claim 2 or 3, wherein the receiving body comprises a plurality of retaining tabs (30) extending around the actuating rod (38) of the male fastener (28) in the locking position, the actuating rod (28) moving each holding tab (30) from the mounting position to the locking position upon insertion of the actuating rod (38) into the receiving body. Fastening assembly according to any one of Claims 1 to 4, in which the second orifice (18) has a diameter greater than the diameter of the first orifice (16), the body for receiving the female fastener (26) comprising at at least one blocking part (34) of an outer diameter substantially equal to that of the first orifice (16), said blocking part (34) being forcefully applied against a wall of the first orifice (16) in the blocking position. A fastener assembly as claimed in any one of claims 1 to 5, wherein the female fastener (26) includes a locking surface, said locking surface being applied against an edge of the second hole (18), opposite of the first orifice (16). Fastener assembly according to Claim 6, in which the male fastener (28) comprises at least one locking tab (40), said locking tab (40) being applied against an edge of the second hole (18), at the opposite the locking surface, the edges of the second orifice (18) being retained against the support (4) between the locking surface and the locking tab (40). A fastener assembly according to any of claims 1 to 7, comprising a plurality of pairs of first and second holes (16, 18), each pair of first and second holes (16, 18) receiving a fastener (20) . A display device comprising at least one screen (2) and a support (4), said screen (2) being fixed to the support (4) by a fixing assembly according to any one of claims 1 to 8. Display device according to Claim 9, in which the second orifice (18) extends into an interface part (12) fixed to the screen (2), the said interface part (12) being fixed to the support (4) by at least one fixing device (20).