JP2008116494A - Liquid crystal display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce attachment members, to simplify a shape of a metal mold and to reduce manufacturing costs by forming a part to which a U-shaped cathode tube is attached in a simple shape. <P>SOLUTION: A second supporting part 42 has a U-shaped frame body 421, a locking part 43 and pedestal parts 422 disposed sandwiching the locking part 43. Side parts of long tube parts 301 in the vicinities of connected parts of the long tube parts 301 with a short tube part 302 abut on the U-shaped frame body 421, and an upper part of the short tube part 302 abuts on curved surfaces 423 of the pedestal parts 422 and a lower part of the short tube part 302 abuts on a curved surface 433 of the locking part 432, so that the short tube part 302 is supported. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a liquid crystal display device, and more particularly to a mounting structure of a backlight which is a light source disposed on the back surface.

  A liquid crystal display device is thin, lightweight, and has low power consumption, and is widely used in notebook PCs, PC monitors, home TV receivers, and the like. The liquid crystal display device transmits light emitted from a backlight to a liquid crystal cell to form an image. The liquid crystal display device includes a reflection sheet for reflecting light emitted from the backlight, a diffusion plate for diffusing the light emitted from the backlight and the light reflected by the reflection sheet, and the diffusion plate. An optical member such as a diffusion sheet is provided to enhance the light diffusion effect.

  FIG. 7 is an exploded perspective view of a conventional liquid crystal display device, and FIG. 8 is an enlarged bottom view of a backlight mounting portion of the liquid crystal display device shown in FIG. In the liquid crystal display device shown in FIG. 7, a rear frame 1, a reflection sheet 2, a backlight 3, a main frame 9, a diffusion plate 5, a diffusion sheet 6, a liquid crystal cell 7, and a bezel 8 are laminated in this order.

  The rear frame 1 is formed by cutting and bending a metal plate, and includes a rectangular bottom surface 11, a rising portion 12 that rises obliquely outward from a short portion of the long side of the bottom surface 11, and a bottom surface 11. A support portion 13 formed integrally with the tip of the rising portion 12 is formed so as to be parallel.

  The reflection sheet 2 is attached to the rear frame 1 and is for reflecting the light emitted toward the case 1 out of the light emitted from the backlight 3 to the liquid crystal cell 6 side.

  The backlight 3 is a light source of a liquid crystal display device, but is not limited thereto, but here has a cathode tube 30 having a U-shaped folded portion and a socket 31 for closing the opening of the cathode tube 30. .

  The main frame 9 has a rectangular frame shape that is inserted into the rear frame 1, and includes a first support portion (in the lower portion (rear frame 1 side) in which an opening portion and a socket 31 attached to the opening portion are inserted ( And a second support portion 92 into which a U-shaped folded portion is inserted.

  The upper portion of the main frame 9 has a step, and the diffusion plate 5 and the diffusion sheet 6 are attached by being inserted into the step portion. Furthermore, a spacer for arranging the liquid crystal cell 7 is formed on the main frame 9 so as not to contact the diffusion sheet 6.

  The diffusion plate 5 and the diffusion sheet 6 have a rectangular shape, and are members that diffuse light reflected by the reflection sheet 2 and light emitted from the backlight 3. The diffusion plate 5 is engaged with a step portion formed on the main frame 9. The diffusion plate 5 equalizes the intensity of the light emitted from the backlight 3 and the light reflected by the reflection sheet 2. The diffusion sheet 6 is for making the intensity of light from the diffusion plate 5 more uniform.

  The light diffused by the diffusion plate 5 and the diffusion sheet 6 is applied to the liquid crystal cell 7. In the liquid crystal cell 7, liquid crystal is sealed between glass substrates on which transparent electrodes are arranged. The liquid crystal cell 7 has a rectangular shape, and a gate substrate 71 to which a gate driver is attached is attached to one long side portion of one glass substrate via a flexible substrate 70. A source substrate 72 to which a source driver is attached is attached via a flexible substrate 70 to one short side of the other glass substrate.

  The bezel 8 has an opening 80 formed in the center. The liquid crystal cell 7 is exposed from the opening 80 of the bezel 8 and is formed so that the exposed portion becomes a display area.

  As shown in FIG. 8, a lamp holder 93 is attached to the U-shaped folded portion of the cathode tube. The U-shaped folded portion of the cathode tube 30 is inserted into the second support portion 92 with the lamp holder 93 attached, so that the cathode tube 30 is not displaced or vibrated so as not to vibrate. (See JP 2006-171167 A, JP 2004-342335 A, etc.).

  Japanese Patent Application Laid-Open No. 7-270786 discloses that a bent portion of a fluorescent lamp is locked using an elastic locking piece formed in a lamp house. Thus, the lamp holder can be omitted by using the locking piece.

  Further, in the invention described in Japanese Patent Application Laid-Open No. 4-47603, there is shown one that holds a fluorescent lamp between a presser piece and an elastic holder that are formed integrally with a casing.

JP 2006-171167 A JP 2004-342335 A JP-A-7-270786 JP-A-4-47603

  However, in the case where the lamp holder is attached to the cathode tube and the U-shaped folded portion of the cathode tube is attached to the main frame, the lamp holder must be prepared separately, and the number of members increases. Further, since the labor for attaching the lamp holder to the cathode tube is increased, the labor and time required for the manufacturing are increased, and the manufacturing cost is increased.

  Further, in the invention described in Japanese Laid-Open Patent Publication No. 7-270786, the lamp holder can be omitted, and thus the manufacturing cost can be reduced, but the movement of the fluorescent lamp in the direction along the lamp house can be reduced. It cannot be restricted. That is, when a force is applied to the fluorescent lamp in a direction along the lamp house, the fluorescent lamp may be displaced or vibrated, and the performance of the backlight may deteriorate.

  Further, in the invention described in Japanese Patent Laid-Open No. 4-47603, the elastic holder need not be attached to the fluorescent lamp, and the labor can be saved as much, but the elastic holder must be prepared and the number of parts is reduced. Wow.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal display device that can attach a U-shaped cathode tube with a small number of members so as not to shift or vibrate.

  In addition, the present invention forms a portion to which the U-shaped cathode tube can be attached in a simple shape, so that the number of members for attachment can be reduced and the shape of the mold can be simplified. An object is to provide a liquid crystal display device capable of reducing the cost.

  In order to achieve the above object, the present invention provides a metal rear frame having a rectangular bottom surface, two long long pipe portions arranged above the reflecting sheet and parallel to each other, and the long The backlight having a plurality of cathode tubes each having a short short tube portion for connecting the tube portions, and a rectangular frame shape, and the length formed on the lower surface of the frame body forming one short side A first support portion for supporting a tip of the tube portion and a holder attached to the tip; and a lower surface of a frame body that forms the other short side, the U-shaped folded portion and the long tube portion A liquid crystal display device including a main frame inserted into the rear frame, the second support portion supporting the vicinity of the U-shaped folded portion. Surrounding the short pipe part and a part of the long pipe part connected to the short pipe part from the side A U-shaped frame, a holding portion disposed in the center of the portion surrounded by the frame and extending downward, and an engaging portion extending from the tip of the holding portion to the opposite side of the first support portion. And a pair of pedestal portions formed so as to protrude downward across the locking portion at a portion surrounded by the frame body, and the engaging portion is The upper surface has a curved surface whose radius of curvature is the same as the radius of the outer periphery of the short tube portion, and the U-shaped folded portion has the long tube portion in contact with the frame body, The upper part is in contact with the pedestal part, and the lower part is engaged with the curved surface of the engaging part.

  According to this configuration, the U-shaped folded portion can be supported as it is by the second support portion, and the support member can be omitted. Thereby, the number of components can be reduced, and the time and labor for manufacturing can be saved. Moreover, it is possible to reduce manufacturing cost.

  In addition, according to this configuration, since the long tube portion is pressed by the second support portion, it is possible to effectively suppress displacement, vibration, etc. of the cathode tube. As a result, it is possible to suppress a decrease in the image display accuracy of the liquid crystal cell.

  Furthermore, the curved surface of the engaging portion is formed in the intermediate portion of the engaging portion, and by sliding the cathode tube, it can be brought into contact with the curved surface, so the mounting process is simple, As much as that, there is less variation in assembly due to the level of proficiency of workers in the manufacturing process. As a result, a liquid crystal display device with stable performance can be manufactured.

  In the above configuration, the U-shaped folded portion is disposed perpendicular to the long tube portion, and includes a short tube portion that integrally connects the long tube portion, and the upper portion of the short tube portion is The lower part may be in contact with the pedestal and the lower part may be engaged with the curved surface of the engaging part.

  In the above-described configuration, the engagement portion may have a tapered shape at the tip. Accordingly, when the U-shaped folded portion of the cathode tube is attached to the second support portion, it is not necessary to elastically deform the locking portion, and the breakage of the locking portion and the cathode tube is suppressed. Is possible. Moreover, attachment is easy and it is also possible to shorten manufacturing time.

  In the above configuration, the pedestal portion has a curved surface having the same radius of curvature as the outer peripheral radius of the short tube portion on the lower surface, and is formed in a stepped shape on the opposite side to the extending direction of the long tube portion. The lower part of the tube part may be in contact with the curved surface of the pedestal part.

  According to this configuration, it is possible to disperse the force applied to the long tube portion of the U-shaped folded portion, and it is possible to reduce the breakage of the cathode tube.

  A more detailed example of the liquid crystal display device according to the present invention may be as follows. That is, a metal rear frame having a rectangular bottom surface, a reflection sheet attached to the rear frame, two long long pipe portions parallel to each other, and a short length connecting the long pipe portions. A backlight having a plurality of cathode tubes provided with a short tube portion, a rectangular frame shape, and a tip of the long tube portion formed on the lower surface of the frame body forming one short side, and the tip Formed on the lower surface of the frame that forms the other short side, and supports the short pipe part and the vicinity of the connection part of the long pipe part with the short pipe part. A main frame inserted into the rear frame, a diffusion plate disposed on the upper portion of the main frame, and two diffusion sheets disposed on the diffusion plate, A transparent electrode is disposed on the main frame. A liquid crystal display device having a liquid crystal cell in which liquid crystal is sealed between a pair of glass substrates, and a bezel having an opening formed in the center, wherein the second support portion is the cathode tube of the cathode tube. A U-shaped frame that surrounds the short pipe part and a part of the long pipe part connected to the short pipe part from the side; a holding part that is arranged at the center of the part surrounded by the frame and extends downward; A locking part having an engaging part extending from the front end of the holding part to the opposite side of the first support part, and a part surrounded by the frame body, and projecting downward across the locking part A pair of pedestal portions formed so that the engaging portion has a curved surface having a curvature radius the same as the outer radius of the short tube portion on the upper surface, and is formed in a tapered step shape. The pedestal portion has a curved surface having a curvature radius the same as a radius of an outer periphery of the short tube portion on a lower surface of the frame body. The part side is formed in a low step shape, the vicinity of the connection part of the long pipe part with the short pipe part is brought into contact with the frame body, and the upper part of the short pipe part is engaged with the curved surface of the pedestal part. A liquid crystal display device characterized in that the lower part is engaged with the curved surface of the engaging part.

  According to the present invention, it is possible to provide a liquid crystal display device that can be attached so that a U-shaped cathode tube is not displaced or vibrated with a small number of members.

  In addition, according to the present invention, by forming the portion to which the U-shaped cathode tube can be attached in a simple shape, the number of members for attachment can be reduced, and the shape of the mold can be simplified. A liquid crystal display device capable of reducing manufacturing costs is provided.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of an example of a liquid crystal display device according to the present invention. In the liquid crystal display device shown in FIG. 1, a rear frame 1, a reflection sheet 2, a backlight 3, a main frame 4, a diffusion plate 5, a diffusion sheet 6, a liquid crystal cell 7, and a bezel 8 are laminated in this order.

  The rear frame 1 is formed by cutting and bending a metal plate, and includes a rectangular bottom surface 11, a rising portion 12 that rises obliquely outward from an end portion on the long side of the bottom surface 11, and a bottom surface 11. A support portion 13 formed integrally with the tip of the rising portion 12 is formed so as to be parallel. The rising portion 12 and the support portion 13 are formed on either of the two long sides of the bottom surface 11.

  The reflection sheet 2 is attached to the rear frame 1 and includes a main body portion 21 that is in close contact with the bottom surface 11, a connection portion 22 that is in close contact with the inner surface of the rising portion 12, and an engagement portion 23 that is in close contact with the support portion 13. ing. The reflection sheet 2 is for reflecting the light emitted toward the case 1 out of the light emitted from the backlight 3 to the liquid crystal cell 6 side.

  The backlight 3 is a light source of the liquid crystal display device, and includes a cathode tube 30 and a socket 31 attached to an end of the cathode tube 30. An electric wire for supplying power to the cathode tube 30 is attached to the socket 31. The cathode tube 30 is a U-shaped tube body having two long long tube portions 301 that are parallel to each other and a short short tube portion 302 that connects the two long tube portions 301 to each other. A U-shaped folded portion 32 is formed by two long tube portions 301 and a short tube portion 302 connecting them. The backlight 3 is not limited to this, but here is provided with three cathode tubes 30.

  The main frame 4 has a rectangular frame shape that is inserted into the rear frame 1, and includes a first support portion 41 in which an opening portion and a socket 31 attached to the opening portion are inserted in the lower portion (rear frame 1 side). And a second support portion 42 on which the U-shaped folded portion 32 is supported.

  The upper portion of the main frame 4 has a step, and the diffusion plate 5 and the diffusion sheet 6 are attached by being inserted into the step portion. Further, a spacer for arranging the liquid crystal cell 7 is formed on the main frame 4 so as not to contact the diffusion sheet 6.

  The diffusion plate 5 and the diffusion sheet 6 have a rectangular shape, and are members that diffuse light reflected by the reflection sheet 2 and light emitted from the backlight 3. The diffusion plate 5 is engaged with a step portion formed on the main frame 4. The diffusion plate 5 equalizes the intensity of the light emitted from the backlight 3 and the light reflected by the reflection sheet 2. The diffusion sheet 6 is for further increasing the uniformity of light from the diffusion plate 5.

  The light diffused by the diffusion plate 5 and the diffusion sheet 6 is applied to the liquid crystal cell 7. In the liquid crystal cell 7, liquid crystal is sealed between glass substrates on which transparent electrodes are arranged. The liquid crystal cell 7 has a rectangular shape, and a gate substrate 71 to which a gate driver is attached is attached to one long side portion of one glass substrate via a flexible substrate 70. A source substrate 72 to which a source driver is attached is attached via a flexible substrate 70 to one short side of the other glass substrate.

  The bezel 8 has an opening 80 formed in the center. The bezel 8 is connected and fixed to the main frame 4 using bolts (not shown), and is not limited to this, but is formed by cutting and bending a metal plate. By attaching the bezel 8 to the main frame 4, the side edges of the diffusion plate 5, the diffusion sheet 6 and the liquid crystal cell 7 disposed on the main frame 4 are pressed.

  The main frame that is the main part of the present invention will be described in more detail. 2 is a bottom view of the main frame, FIG. 3 is a perspective view of an enlarged view of the second support portion of the main frame as viewed from below, FIG. 4 is, and FIG. 5 is a cross section of the second support portion. FIG.

  As shown in FIG. 2, the first support portion 41 of the main frame 4 is a cylindrical portion having a rectangular cross section opened downward, and the socket 31 attached to the opening of the long tube portion 301 is inside. Inserted. Thus, the socket 31 and the long pipe portion 301 attached to the socket 31 are held at the lower part of the main frame 4.

  As shown in FIGS. 3 and 4, the second support portion 42 is formed below the main frame 4, and is formed at the center of the U-shaped frame body 421 and the U-shaped frame body 421. It has the latching | locking part 43 arrange | positioned and the base part 422 arrange | positioned on both sides of the latching | locking part 43. FIG. The frame body 421, the locking portion 43, and the pedestal portion 422 are formed integrally with the main frame 4.

  As shown in FIGS. 3 and 5, the locking portion 43 includes a holding portion 431 that protrudes from the lower surface of the main frame 4, and an engagement formed at the tip of the holding portion 431 so as to be orthogonal to the holding portion 431. Part 432. The engaging portion 432 extends on the side opposite to the first support portion 41, that is, toward the U-shaped frame body 421 in FIGS. 3 and 5.

  A curved surface 433 is formed on the upper surface of the engaging portion 432, and a step whose tip is thinner than the holding portion 431 side is formed. In addition, the pedestal portion 422 has a curved surface 423 on the lower surface, and a thin step is formed on the opposite side to the first support portion 41.

  As shown in FIGS. 3 and 4, when the U-shaped folded portion 32 of the cathode tube 30 is attached to the second support portion 42, the vicinity of the connection portion between the long tube portion 301 and the short tube portion 302 is The character-shaped frame body 421 is in contact with the side portion. In addition, the short pipe portion 302 is supported by the upper portion being in contact with the curved surface 423 of the pedestal portion 422 and the lower portion being in contact with the curved surface 433 of the engaging portion 432.

  When attaching the U-shaped folded portion 32, the short tube portion 302 is passed through the space 4 s between the distal end portion of the engaging portion 432 and the wall surface of the main frame 4, and the short tube portion 302 is inserted into the cathode tube 30. 1 It moves so that it may move to the support part 41 side. When the short pipe portion 302 is in contact with the curved surface 423 of the pedestal portion 422 and the lower portion is in contact with the curved surface 433 of the engaging portion 432, the long pipe portion 301 is rotated around the short pipe portion 302. Then, the socket 31 attached to the tip of the long pipe portion 301 is inserted into the first support portion 41. Thereby, the cathode tube 30 is attached to the main frame 4.

  Thus, the cathode tube 30 can suppress the cathode tube 30 from being displaced by supporting the U-shaped folded portion 32 with the second support portion 42, thereby stabilizing the performance of the backlight 3. be able to. Further, as described above, the short pipe portion 302 is fitted and slid to be supported so as not to rattle, so that the attachment is easy and the time required for assembly can be reduced accordingly. is there.

  FIG. 6 is a cross-sectional view of another example of the second support portion. The second support portion 44 shown in FIG. 6 has a curved surface 443 formed on the upper surface of the engaging portion 442, but is not a step. That is, a raised portion 444 is formed on the top of the tip of the engaging portion 442 to prevent back-turning. Other portions have the same shape as the second support portion shown in FIGS.

  When the short tube portion 302 of the cathode tube 30 is attached to the second support portion 44 shown in FIG. 6, the latching portion 441 is elastically deformed, and the short tube portion 302 is moved to a portion in contact with the curved surface 443 and then elastically deformed. By returning to the original state, the cathode tube 30 can be supported and it can be prevented from slipping off and falling off.

  In the above-described embodiment, both the engaging portion and the pedestal portion have curved surfaces, and the second support portion that supports the short tube portion of the cathode tube by contacting the curved surface will be described as an example. However, the present invention is not limited to this, and a curved surface may be formed on either the engaging portion or the pedestal portion.

  Further, the liquid crystal display device is described as an example having three backlights 3 as light sources. However, the liquid crystal display device is not limited thereto, and light is incident on the liquid crystal cell 6 so as not to be biased sufficiently. The thing of the number which can be widely used can be adopted.

  As mentioned above, although embodiment of invention was described concretely, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary.

  The present invention can be applied to a liquid crystal display device such as a liquid crystal display.

It is a disassembled perspective view of an example of the liquid crystal display device concerning this invention. It is a bottom view of the main frame of the liquid crystal display device shown in FIG. It is the perspective view which looked at what expanded the 2nd support part of the main frame shown in FIG. 2 from the downward direction. It is a bottom view of the 2nd support part shown in FIG. It is sectional drawing of the 2nd support part shown in FIG. It is sectional drawing of the other example of a 2nd support part. It is a disassembled perspective view of the conventional liquid crystal display device. It is the bottom view to which the attachment part of the backlight of the liquid crystal display device shown in FIG. 7 was expanded.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rear frame 11 Bottom surface 2 Reflective sheet 3 Backlight 30 Cathode tube 31 Socket 4 Main frame 41 1st support part 42 2nd support part 5 Diffusion plate 6 Diffusion sheet 7 Liquid crystal cell 71 Gate substrate 72 Source substrate 8 Bezel

Claims (6)

A metal rear frame with a rectangular bottom;
A reflective sheet attached to the rear frame;
A backlight having a plurality of cathode tubes provided with two long long tube portions parallel to each other and a short short tube portion connecting the long tube portions;
A rectangular frame shape, a first support portion for supporting the tip of the long tube portion formed on the lower surface of the frame body forming one short side and a holder attached to the tip, and the other short side A main frame formed on the lower surface of the frame body to be formed, and comprising a second support portion for supporting the short tube portion and a portion near the connecting portion of the long tube portion to the short tube portion; When,
A diffusion plate disposed on an upper portion of the main frame;
Two diffusion sheets placed on top of the diffusion plate;
A liquid crystal cell in which liquid crystal is sealed between a pair of glass substrates disposed on the main frame and provided with a transparent electrode;
A liquid crystal display device having a bezel with an opening formed in the center,
The second support part is surrounded by the U-shaped frame body that surrounds the short tube part of the cathode tube and a part of the long tube part connected to the short tube part from the side, and the frame body. A locking portion having a holding portion disposed at the center of the portion and extending downward, and an engaging portion extending from the tip of the holding portion to the opposite side of the first support portion, and a portion surrounded by the frame body , And a pair of pedestal portions formed so as to protrude downward across the locking portion,
The engaging portion has a curved surface having a curvature radius the same as the radius of the outer periphery of the short tube portion on the upper surface, and is formed in a tapered step shape.
The pedestal has a curved surface with a radius of curvature equal to the radius of the outer periphery of the short tube on the lower surface, and the inner side of the frame is formed in a low step shape,
The vicinity of the connection portion of the long tube portion with the short tube portion is in contact with the frame body, the upper portion of the short tube portion is engaged with the curved surface of the pedestal portion, and the lower portion is engaged with the curved surface of the engaging portion. A liquid crystal display device characterized by being combined. A metal rear frame with a rectangular bottom;
A reflective sheet attached to the rear frame;
A backlight having a plurality of cathode tubes provided with two long long tube portions parallel to each other and a short short tube portion connecting the long tube portions;
A rectangular frame shape, a first support portion for supporting the tip of the long tube portion formed on the lower surface of the frame body forming one short side and a holder attached to the tip, and the other short side A main frame formed on the lower surface of the frame body to be formed, and comprising a second support portion for supporting the short tube portion and a portion near the connecting portion of the long tube portion to the short tube portion; When,
A diffusion plate supported on an upper portion of the main frame;
Two diffusion sheets placed on top of the diffusion plate;
A liquid crystal cell in which liquid crystal is sealed between a pair of glass substrates disposed on the main frame and provided with a transparent electrode;
A liquid crystal display device having a bezel with an opening formed in the center,
The second support part is surrounded by the U-shaped frame body that surrounds the short tube part of the cathode tube and a part of the long tube part connected to the short tube part from the side, and the frame body. A locking portion having a holding portion disposed at the center of the portion and extending downward, and an engaging portion extending from the tip of the holding portion to the opposite side of the first support portion, and a portion surrounded by the frame body , And a pair of pedestal portions formed so as to protrude downward across the locking portion,
The engaging portion has a curved surface having a radius of curvature on the upper surface that is the same as the radius of the outer periphery of the short tube portion,
The pedestal has a curved surface with a radius of curvature equal to the radius of the outer periphery of the short tube on the lower surface, and the inner side of the frame is formed in a low step shape,
The vicinity of the connection portion of the long tube portion with the short tube portion is in contact with the frame body, the upper portion of the short tube portion is engaged with the curved surface of the pedestal portion, and the lower portion is engaged with the curved surface of the engaging portion. A liquid crystal display device characterized by being combined. A metal rear frame with a rectangular bottom;
A backlight having a plurality of cathode tubes, which is provided above the reflecting sheet and includes two long long tube portions parallel to each other and a short short tube portion connecting the long tube portions; ,
A rectangular frame shape, a first support portion for supporting the tip of the long tube portion formed on the lower surface of the frame body forming one short side and a holder attached to the tip, and the other short side Formed on the lower surface of the frame body to be formed, and provided with a U-shaped folded portion and a second support portion that supports the vicinity of the U-shaped folded portion of the long tube portion, and is inserted into the rear frame A liquid crystal display device having a main frame,
The second support part is surrounded by the U-shaped frame body that surrounds the short tube part of the cathode tube and a part of the long tube part connected to the short tube part from the side, and the frame body. A locking portion having a holding portion disposed at the center of the portion and extending downward, and an engaging portion extending from the tip of the holding portion to the opposite side of the first support portion, and a portion surrounded by the frame body , And a pair of pedestal portions formed so as to protrude downward across the locking portion,
The engaging portion has a curved surface having a radius of curvature on the upper surface that is the same as the radius of the outer periphery of the short tube portion,
The U-shaped folded portion has the long tube portion in contact with the frame, the upper portion of the folded portion is in contact with the pedestal portion, and the lower portion is engaged with the curved surface of the engaging portion. A liquid crystal display device. The U-shaped folded portion is disposed perpendicular to the long tube portion, and includes a short tube portion that integrally connects the long tube portion,
The liquid crystal display device according to claim 3, wherein an upper portion of the short tube portion is in contact with the pedestal and a lower portion is engaged with a curved surface of the engaging portion.   The liquid crystal display device according to claim 3, wherein the engaging portion has a tapered shape at a tip end. The pedestal portion has a curved surface having the same radius of curvature as the outer periphery radius of the short tube portion on the lower surface, and is formed in a stepped shape on the opposite side to the extending direction of the long tube portion,
The liquid crystal display device according to claim 3, wherein a lower portion of the short tube portion is in contact with a curved surface of the pedestal portion.

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