JP2007017498A - Screen protective device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To maintain a transparent resin board on all over a screen of a liquid crystal display apparatus without influence of the secular change. <P>SOLUTION: Fixtures 10 are prepared a plurality of suitable places of an acrylic board 6 of a size capable of covering the screen 4 of a liquid crystal television set 2 and these are attached to edges of the screen 4. The fixtures 10 attach magnetic coupling bodies 12 arranged on the back of the acrylic board 6 in the edges of the screen at the suitable places. Bolts 14 penetrate the acrylic board 6 from these respective coupling bodies 12 and the tips are positioned on the front face side of the acrylic board 6. Cap nuts 22 screwed on the tip sides of these bolts fasten the acrylic board to the bolts 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an apparatus for protecting a liquid crystal screen of a liquid crystal display device such as a liquid crystal television receiver.

  In recent years, liquid crystal display devices such as liquid crystal television receivers have become popular in general households. If a child or the like strongly presses the liquid crystal screen of the liquid crystal television receiver, the liquid crystal screen may be damaged. The cost of repairing the breakage of the liquid crystal screen is high, especially for a large screen. Therefore, it is conceivable to protect the liquid crystal display screen. Japanese Patent Application Laid-Open No. H10-228688 discloses a technique for providing a protective filter on the entire surface of a liquid crystal screen.

  In the technique of this Patent Document 1, spacers having elasticity such as rubber are attached to a plurality of locations on the edge of the liquid crystal screen, and a protective filter is attached on these spacers.

JP 2004-326020 A

  However, in the technique of Patent Document 1, since the protective filter is fixed by the spacer, the protective filter may be detached from the spacer due to aging.

  An object of the present invention is to provide a protective device that does not come off due to aging.

  A screen protection device for a liquid crystal display device according to an aspect of the present invention includes a rectangular transparent resin plate having a size capable of covering the screen of the liquid crystal display device. As this resin plate, for example, an acrylic resin plate can be used. A plurality of fixing tools are provided at a plurality of appropriate positions on the resin plate and attached to the edge of the screen. It is desirable to provide the plurality of fixtures at least at the four corners of the resin plate. In each fixing tool, a magnet coupling body is provided behind the resin plate at the appropriate position. This combination is attached to the edge of the screen by magnetic force. The bolt penetrates the resin plate from the combined body, and the tip of the bolt is located on the front side of the resin plate. A nut is screwed to the front end side of the bolt, and the resin plate is fixed to the bolt. In addition, if there is a high magnetic material, for example, a metal part, to which the magnet is adsorbed at the edge of the display screen of the liquid crystal display device, the bonded body can be adsorbed to it, and if there is no high magnetic material, the high magnetic material It is desirable to pre-attach the body.

  If comprised in this way, each fixing tool will be arrange | positioned in the appropriate position of a resin board, each bolt extended from the coupling body of each fixing tool will be inserted in a resin board, a nut will be screwed together in a bolt, and each coupling body will be resin. Secure to the board. The combined body thus attached to the resin plate is attached to the edge of the screen of the liquid crystal display device. Therefore, the resin plate can be attached to the front surface of the screen of the liquid crystal display device only by a simple operation of attaching the combined body to the edge of the liquid crystal display device by magnetic force, and the resin plate does not come off due to deterioration over time. Further, the resin plate can be firmly fixed by selecting a magnet having an appropriate magnetic force.

  Another nut can be provided that is screwed into the bolt behind the resin plate and is in contact with the resin plate and the combined body. By providing another nut in this manner, a gap can be formed between the resin plate and the screen of the liquid crystal display device, and heat dissipation can be promoted from the surface of the liquid crystal screen.

  Furthermore, the resin plate protector can be inserted through the bolt in a state where the nut and the front surface of the resin plate and the other nut and the back surface of the resin plate are in contact with each other. As the resin plate protector, for example, felt that contacts the front and back surfaces of the resin plate can be used. By comprising in this way, even if the resin plate is couple | bonded with the coupling body with the volt | bolt and the nut, a resin plate is not damaged.

  The protection device for a liquid crystal display device according to another aspect of the present invention includes a transparent resin plate and a plurality of fixtures as in the above aspect. However, each fixing tool is provided on a sandwiching body that sandwiches the front and back edges of the resin plate at a plurality of appropriate positions of the resin plate so that the plate-like body is positioned on the back side of the resin plate. And a holding part that slides the plate-like body along its length direction and accommodates it inside. An engaging means is provided between the attachment portion and the holding portion so as to engage the attachment portion and the holding portion. The engaging means is preferably configured to automatically engage the attachment portion and the holding portion when the plate-like body is accommodated in the holding portion by a predetermined length. A combined body is provided on the back side of the holding portion, and the combined body is attached to the edge of the screen of the liquid crystal display device.

  If comprised in this way, the suitable place of a resin board is each clamped with the clamping body of each attachment part, the plate-like body of an attachment part is slid and accommodated in a holding | maintenance part, and it fixes by an engagement means. In this way, the resin plate can be attached to the entire surface of the liquid crystal display device by attaching the combined body having the holding portion attached to the resin plate via each attachment portion to the edge of the screen of the liquid crystal display device by magnetic force. it can. Therefore, the resin plate does not come off due to deterioration over time, and it is easy to attach the combined body to the edge of the display screen of the liquid crystal display device, and by selecting a magnet having an appropriate magnetic force, the resin plate is firmly Can be fixed.

  The holding portion is attached to a main wall attached to the combined body, a sub-wall positioned parallel to and spaced from the main wall, and a surface of the main wall facing the sub-wall, And a base that forms a gap with the wall. The plate-like body slides in a gap between the base and the auxiliary wall. The engaging means includes an engaging claw formed on the surface of the plate-like body on the base side and an engaging hole formed on the surface of the base on the plate-like body side. In the plate-like body, it is desirable that the engaging claw be formed at the tip of a lever-shaped member, and the middle of this member is coupled to the plate-like body, and the plate-like body and the member are appropriately bent. It is desirable that the engaging claw and the engaging claw be integrally formed of synthetic resin. As a result, when the plate-like body is slid, the engaging claw is caught in the engaging hole, and when the plate-like body is further slid, the member bends and gets over so that the engaging claw gets over the engaging hole. Then, the engaging claw engages with the engaging hole. When releasing the engagement, the lever-like member may be bent so that the engagement claw is separated from the engagement hole.

  By comprising in this way, even if it does not form the hole for inserting a volt | bolt in a resin board, a coupling body can be attached to a resin board. It is also possible to prevent the attachment portion from being detached from the holding portion by forming a groove in the base partway along the length direction of the base and fitting a protrusion provided on the plate-like body into the groove. Alternatively, the sub-wall is extended from the position corresponding to both sides of the main wall toward the center so as to face the main wall, and a gap is formed between the front ends of the sub-walls. It is also possible to reduce the distance between the main wall and the sub wall by recessing both sides of the plate-like portion so that the surfaces of the plate-like portion coincide with each other.

  As described above, according to the present invention, since the resin plate is fixed to the edge of the screen of the liquid crystal display device by magnetic force, the screen of the liquid crystal display device is protected over a long period of time without the resin plate coming off due to aging. be able to.

  The protective device according to the first embodiment of the present invention is a liquid crystal display device as shown in FIG. 3, for example, a rectangular transparent resin plate, such as an acrylic resin, shown on the front surface of the liquid crystal screen 4 of the liquid crystal television receiver 2. This is for attaching the plate 6. The acrylic plate 6 is formed in a size that can cover the liquid crystal screen 4 and the surrounding frame 8. Fixing tools 10 are attached to appropriate positions of the acrylic plate 6, for example, at the four corners and the center of both long sides, and the acrylic plate 6 is attached to the frame 8 by these fixing tools 10.

  As shown in FIG. 1, the fixture 10 has a combined body 12. The combined body 12 is, for example, a magnet formed in a disk shape having a diameter slightly smaller than the width of the frame 8. Bolts 14 are inserted from the back side of the joined body 12, and their tips protrude from the front side of the joined body 12. The head of the bolt 14 is buried in the back surface of the combined body 12.

  A nut 16 is screwed onto the bolt 14 so as to come into contact with the front side of the joined body 12. A resin plate protector 18 is inserted into the bolt 14 so as to contact the front side of the nut 16. In this resin plate protector 18, a washer 18a is disposed on the side in contact with the nut 16, and a felt material 18b is attached thereto. The washer 18a and the felt material 18b have the same diameter.

  The acrylic plate 6 is inserted into the bolt 14 on the tip side of the felt material 18b, and the felt material 18b is in contact with the acrylic plate 6. The insertion position of the bolt 14 into the acrylic plate 6 is somewhat inside the outer edge of the acrylic plate 6. Similar to the resin plate protector 18, a resin plate protector 20 made of a washer 20 a and a felt material 20 b is inserted into the bolt 14 on the tip side of the acrylic plate 6. Also in the resin plate protection body 20, the resin plate protection body 20 is inserted through the bolts 14 so that the felt material 20 b contacts the acrylic plate 6. A cap nut 22 is screwed onto the bolt 14 on the tip side of the resin plate protector 20 to press the acrylic plate 6 against the nut 16. At this time, since the felt members 18b and 20b of the resin plate protectors 18 and 20 are in contact with the acrylic plate 6, even if pressed by the cap nut 22, the acrylic plate 6 is not damaged. The nut 16 can be removed depending on circumstances, but the nut 16 is provided when it is desirable to leave a predetermined distance between the combined body 12 and the acrylic plate 6. In addition, the cover 24 is provided in the edge of the acrylic board 6 corresponding to the position where each fixing tool 10 is arrange | positioned so that the front and back surface may be pinched | interposed. Among these covers 24, those arranged at the four corners of the acrylic plate 6 as shown in FIG. 2 are formed in a bowl shape so as to cover the corners of the acrylic plate 6. The cover 24 arranged at the center of the long side of the acrylic plate 6 is linear.

  A magnetized plate, for example, a plate member of a high magnetic material, for example, a metal plate 26 is attached to positions corresponding to the four corners and the center of the long side of the frame 8 of the liquid crystal television receiver 2. The acrylic plate 6 is attached to the entire surface of the liquid crystal screen 4 by adsorbing the bonded body 10 to these metal plates 26 by magnetic force. It should be noted that the metal plate 26 is not necessary when there is a metal portion inside the frame 8 of the liquid crystal television receiver 2.

  In the protection device configured as described above, the acrylic plate 6, the protection members 18 and 20, the cap nut 22 and the cover 24 are attached to the bolt 14 of the combined body 10 in advance and shipped together with the metal plate 26, and the liquid crystal television receiver is received. The metal plate 26 is attached to the four corners and the center of the long side of the frame 8 of the machine 2, and the coupling body 10 is adsorbed onto the metal plate 26 to complete the attachment. Since it is attached by a magnetic force, it does not easily deteriorate over time and can be used for a long time. Moreover, since it attaches by magnetic force, the position of the acrylic board 6 can also be adjusted easily. Further, when the acrylic plate 6 is attached to the frame 8 via a spacer, the gap between the acrylic plate 6 and the liquid crystal screen 4 is small, and heat cannot be radiated well from the surface of the liquid crystal screen 4, Since the acrylic plate 6 is attached to the joined body 10 and this joined body 10 is attached to the frame 8, a gap can be formed between the acrylic plate 6 and the liquid crystal screen 4, and heat radiation can be performed satisfactorily. In this embodiment, since the nut 14 is provided, the gap can be further increased, and heat can be radiated more satisfactorily. Further, when the spacer is attached, the spacer bears all the weight of the acrylic plate 6, and the large-screen liquid crystal display device cannot hold the acrylic plate 6 sufficiently. Therefore, even if it is a large acryl board 6, it can fully hold | maintain if what has a suitable magnetic force is selected for the magnet of the coupling body 10.

  In the above embodiment, the cap nut 22 is used, but a normal nut can also be used. In some cases, either one or both of the protectors 18 and 20 can be removed.

  The protection device of the second embodiment of the present invention also has an acrylic plate 6 and a fixture 100, as shown in FIG. 3 shown in relation to the protection device of the first embodiment. ing. The installation positions of these fixtures 100 are the four corners of the acrylic plate 6 and the center of both long sides, similarly to the installation position of the fixture 10 of FIG.

  The fixture 100 also has a disk-shaped coupling body 120 with a built-in magnet, like the fixture 10 of the first embodiment. A holding portion 122 is provided on the front side of the combined body 120.

  The holding portion 122 has a guide member 124, and the guide member 124 has a rectangular main wall 128 fixed to the front surface of the combined body 120 by a bolt 126. The length dimension of the main wall 128 is larger than the diameter of the combined body 120, and the combined body 120 is fixed at a position close to one end side of the main wall 128. Subwalls 130 a and 130 b are arranged in parallel to the main wall 128 at a predetermined distance from the main wall 128. As shown in FIG. 4, the sub-walls 130 a and 130 b are located on the same plane with a space at a position corresponding to the central portion of the main wall 128. Its length dimension is substantially the same as the main wall 128. The auxiliary wall 130a is connected to both side edges of the main wall 128 by the side wall 132a, and the auxiliary wall 130b is connected by the side wall 132b. In other words, the guide member 124 is formed in a shape in which a C-shape with an angular longitudinal section is laid down.

  A base 134 is disposed on the surface of the main wall 128 facing the sub-walls 130a and 130b. The base 134 has a length dimension and a width dimension that fit between the main wall 128 and the sub-walls 130a and 130b. The front surface of the base 134, that is, the surface facing the sub-walls 130a and 130b, There is a gap between the walls 130a and 130b. That is, the base 134 has a depth dimension shorter than the distance between the main wall 128 and the sub-walls 130a and 130b. Bolts 126 are inserted through the base 134, and the base 134 is fixed to the main wall 128 with screws 136.

  A groove 138 is formed at the front center of the base 134. The groove 138 is formed from the other end opposite to the one end to which the combined body 120 is attached to the middle toward the one end and opens toward the sub-walls 130a and 130b. As shown in FIG. 3, a wall 140 is formed at the end on one end side of the groove 138 so as to protrude into the gap between the base 134 and the sub-walls 130a and 130b, and on the other end side, the base 140 is formed. A claw 142 facing the side 134 is formed, and an engagement hole 144 is formed between the claw 142 and the end of the groove 138.

  On the other hand, sandwiching bodies 146 that sandwich the front and back surfaces of the acrylic plate 6 are provided at the four corners of the acrylic plate 6 and the center positions of the long sides, respectively. The sandwiching body 146 at the center of the long side is formed in a substantially linear shape as shown in FIG. A plate-like body 148 is formed linearly toward the center side of the acrylic plate 5 integrally with the back side portion of the sandwiching body 146. The length of the plate-like body 148 is substantially equal to the length of the main wall 128, and the width is shorter than the width of the sandwiching body 146, as shown in FIGS. 6 (a) and 6 (b). . The plate-like body 148 is located approximately at the center of the sandwiching body 146. The thickness of the plate-like body 146 is equal to the distance between the front surface of the sub-walls 130a and 130b and the front surface of the base 134 at the center.

  As shown in FIGS. 6A and 6B, a groove 150 is formed in the center of the back surface of the plate-like body 148 along the length direction thereof. The depth of the groove 150 is selected so that the above-described wall 140 can pass through the groove 150. An engaging claw 152 that can be engaged with the engaging hole 144 is formed in the middle of the groove 150 in a state where the plate-like body 148 is completely accommodated between the base 134 and the sub-walls 130 a and 130 b. The engaging claw 152 is formed at one end of the lever-shaped member 154, and the middle of the lever-shaped member is coupled to the groove bottom of the groove 150. Therefore, by pressing the other end of the lever-like member 154 to the acrylic plate 6 side by hand, the engaging claw 152 is moved from the state in the groove 150 to the state in which it is exposed to the outside as shown by the broken line. Become. When the pressing by hand is released, the holding body 146, the plate-like body 148, the lever-like member 154, and the engaging claw 152 are integrally formed of synthetic resin so as to return to the state shown by the broken line. The engagement hole 144 and the engagement claw 152 constitute engagement means.

  As shown in FIG. 5, step portions 156a and 156b are formed on both sides of the front surface of the plate-like body 148 so as to be thinned by the thickness of the sub-walls 130a and 130b over the same width as the width of the sub-walls 130a and 130b. Has been. Further, small protrusions 158a and 158b are formed at the end opposite to the sandwiching body 146 on the back surface corresponding to the step portions 156a and 156b. Small grooves 160a and 160b are formed on the front side of the base 134 from the one end to the middle of the holding body 146 so that the small protrusions 158a and 158b pass. The plate-like body 148 is disposed between the sub-walls 130a and 130b and the base 134 with the small protrusions 158a and 158b inserted into the small grooves 160a and 160b.

  At this time, the groove 150 of the plate-like body 148, and accordingly, in FIG. 3, the plate-like body 134 and the sandwiching body 146 are drawn so as to be separable from the guide member 124 and the base 134. The plate-like body 134 and the sandwiching body 146 along the small grooves 160 a and 160 b are in a state in which the plate-like body 138 is completely accommodated in the guide member 124 and a part of the plate-like body 138 in the guide member 124. Advances and retreats with the remaining state. Then, while the plate-like body 138 is completely accommodated in the guide member 124 from the state where a part of the plate-like body 138 remains in the guide member 124, the plate-like body 134 and the sandwiching body 146 are being transferred. When the engaging claw 152 is bent so as to get over the engaging claw 142 of the wall 140 and the plate-like body 138 is completely accommodated in the guide member 124, the engaging claw 152 is engaged with the engaging hole 144. The movement of the plate-like body 134 and the sandwiching body 146 is restrained (see FIG. 7).

  In this way, after each of the holding bodies 146 holding the acrylic plate 6 is coupled to the corresponding holding part 122, it is attached to the frame 8 of the liquid crystal television receiver 2 as in the first embodiment. The acrylic plate 6 is fixed to the entire surface of the liquid crystal display screen 4 by adsorbing the bonded body 120 to the provided metal plate 26. As described above, the step portions 156a and 156b are provided on the front surface of the plate-like body 138. Therefore, in this fixed state, the back surface of the acrylic plate 6 has the auxiliary walls 130a and 130b on the same plane and the plate-like body 134. This prevents the formation of a delicate gap on the back side of the acrylic plate 6.

  In the fixture 100 provided at the four corners of the acrylic plate 6, as shown in FIG. 8, the sandwiching body 146 has a square shape so as to sandwich the front and back surfaces of the corners of the acrylic plate 6. The plate-like body 134 is arranged so that the center thereof is positioned on a straight line that passes through the apex of the rectangular holding body 146 and forms an angle of 45 degrees with respect to each side of the holding body 146. Accordingly, the holding portion 122 is also arranged so that the center thereof is located on the straight line.

  When the acrylic plate 6 fixed to the holding portion 122 is removed from the holding portion 122, for example, to remove dirt on the surface thereof, one end of the lever-like member 154 is tilted in the direction of the acrylic plate 6 to engage the engaging claw. 152 may be released from the engagement hole 146 and the acrylic plate 6 may be slid in the direction opposite to the combined body 120. When the acrylic plate 6 is attached again after cleaning, for example, each plate-like body 134 is fitted from above to the lower two corners of the display screen 4 and the holding portion 122 in the middle of the lower long side, and thereafter the acrylic plate The center of 6 is somewhat bent to the front side, and the plate-like body 134 is fitted to the holding portion 122 at the center of the upper two corners and the upper long side.

  Also with this protective device, the acrylic plate 6 is fixed to the frame around the liquid crystal display screen 4 by magnetic force, so that it is difficult to deteriorate over time and can be used over a long period of time. Adjustment is also easy. Moreover, since the acrylic plate 6 can be easily removed, cleaning and the like can be easily performed.

  In the second embodiment, the engagement claw 142 is provided in the engagement hole 146. However, the engagement claw 142 only needs to have a portion where the engagement claw 152 can be engaged. There is no need to provide it. Further, the small protrusions 158a and 158b and the grooves 160a and 160b are provided so that the plate-like body 134 is not completely removed from the holding portion 122, but the plate-like body 134 may be removed from the holding portion 122. Can remove these. Furthermore, the step portions 156a and 156b are formed on the front surface of the plate-like body 134 to prevent a gap from being formed between the acrylic plate 6, the sub-walls 130a and 130b, and the front center of the plate-like body 134. Depending on circumstances, the step portions 156a and 156b may not be provided.

  In both the above embodiments, the protective device is implemented in a liquid crystal television receiver, but may be implemented in other liquid crystal display devices, for example, a liquid crystal display device for a monitor of a personal computer. In both of the above embodiments, an acrylic plate is used as the transparent resin plate. However, the present invention is not limited to this, and various types can be used as long as the resin plate is transparent and has a certain degree of synthesis. . In both the above-described embodiments, the fixtures 10 and 100 are provided at the four corners and the center of the long side of the acrylic plate 6. However, the fixtures 10 and 100 are not necessarily provided at these positions. It can also be provided at at least one location on each location and both short sides.

It is a partial omission vertical side view which shows the state which attaches the protection apparatus of the 1st Embodiment of this invention to a liquid crystal display device. FIG. 2 is a partially omitted front view of a corner portion of the liquid crystal display device of FIG. 1. It is a front view of the liquid crystal display device of FIG. It is a partial omission vertical side view which shows the state which attaches the protection apparatus of the 2nd Embodiment of this invention to a liquid crystal display device. It is a front view of the state which decomposed | disassembled the protection apparatus of FIG. It is the top view and back view of the attaching part of the protection apparatus of FIG. It is a vertical side view of the state which attached the attaching part of the protection apparatus of FIG. 4 to the holding | maintenance part. FIG. 5 is a partially omitted front view of a corner portion of the liquid crystal display device of FIG. 4.

Explanation of symbols

2 Liquid crystal television receiver (liquid crystal display device)
4 LCD screen 6 Acrylic plate (transparent resin plate)
10 Fixing device 12 Combined body 14 Bolt 22 Cap nut (nut)

Claims (5)

A rectangular transparent resin plate of a size capable of covering the screen of the liquid crystal display device;
A plurality of fixtures respectively provided at a plurality of appropriate positions of the resin plate and attached to the edge of the screen;
Each of the fixtures,
A magnet-made assembly that is provided behind the resin plate at the appropriate position and is attached to an edge of the screen;
Bolts penetrating the resin plate from this combined body, the tip is located on the front side of the resin plate,
A nut that is screwed to the front end side of the bolt and fixes the resin plate to the bolt,
A screen protection device for a liquid crystal display device.   2. The screen protection device for a liquid crystal display device according to claim 1, further comprising: another nut screwed into the bolt behind the resin plate and contacting each of the resin plate and the combined body. Screen protector.   The screen protection device for a liquid crystal display device according to claim 2, wherein the bolt is inserted into the nut and the front surface of the resin plate, and in contact with the other nut and the back surface of the resin plate. A screen protection device for a liquid crystal display device having a protective resin plate. A rectangular transparent resin plate of a size capable of covering the screen of the liquid crystal display device;
A plurality of fixtures respectively provided at a plurality of appropriate positions of the resin plate and attached to the edge of the screen;
Each of the fixtures,
An attachment portion provided on a sandwiching body that sandwiches the front and back edges of the resin plate at a plurality of appropriate positions of the resin plate, so that the plate-like body is located on the back side of the resin plate;
A holding portion for sliding the plate-like body along its length direction and accommodating it inside,
Engagement means provided between the attachment portion and the holding portion so as to engage the attachment portion and the holding portion;
A magnetic coupling body provided on the back side of the holding unit and attached to the edge of the screen of the liquid crystal display device;
A screen protection device for a liquid crystal display device. 5. The screen protection device for a liquid crystal display device according to claim 4, wherein the holding portion includes a main wall attached to the combined body, a sub-wall located parallel to and spaced from the main wall, and the main wall. A base that is attached to a surface facing the subwall and that forms a gap with the subwall,
The plate-like body slides in a gap between the base and the sub-wall,
The screen protector for a liquid crystal display device, wherein the engaging means includes an engaging claw formed on the base-side surface of the plate-like body and an engaging hole formed on the plate-side surface of the base. apparatus.

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