JP2013167827A - Display device and television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device in which the number of screws used to fix a rear cabinet has been reduced, and a television receiver.SOLUTION: A display device includes: a frame-type front cabinet 1 that is arranged around a display panel (liquid display module 2) that displays a video; a box-type rear cabinet 6 that is arranged on the rear side of the front cabinet; and a box-type housing (backlight chassis 4) that is accommodated in the rear cabinet 6, and accommodates a light source that irradiates the display panel with light. The housing includes an engaging part (pawl part 4a); and the rear cabinet 6 includes an engaged part (hook 6a) that is engaged with the engaging part to fix the rear cabinet 6.

Description

  The present invention relates to a display device for displaying an image and a television receiver including the display device.

  2. Description of the Related Art In recent years, liquid crystal display devices using a liquid crystal panel as a video display unit have been widely adopted as image display devices for television receivers, computers, and portable terminals because they are thin and lightweight and consume less power. . The liquid crystal display device houses a liquid crystal display panel, a front cabinet disposed around the liquid crystal display panel, a light source that supplies light to the liquid crystal display panel, a backlight chassis (housing) that houses the light source, and a backlight chassis. Includes rear cabinet. The liquid crystal display device has a structure in which a backlight chassis containing a liquid crystal display panel and a light source is housed between a front cabinet and a rear cabinet, and the front cabinet and the rear cabinet are fixed to each other. The liquid crystal display device displays an image by polarizing light supplied from a light source on a liquid crystal display panel. In such a display device, the rear cabinet fixes the front cabinet and the backlight chassis using screws. In recent years, with the increase in the size of display devices, the number of screws for fixing the rear cabinet has increased, and the number of screw parts, the number of work steps for fixing the rear cabinet, and the work time have increased. Therefore, reduction of the number of screws to be used is required.

  Patent Document 1 describes a display device that fixes a cabinet without using screws. In the display device, a protrusion is provided on the internal chassis that supports the liquid crystal display panel, and a hook that engages with the protrusion is provided on the front cabinet, thereby fixing the front cabinet to the internal chassis without using screws. .

JP 2006-162985 A

  However, in the above prior art, screws are not used for fixing the front cabinet, and screws are still used for fixing the rear cabinet at all the fixing points.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a display device and a television receiver in which screws used for fixing a rear cabinet are reduced.

  A display device according to the present invention is housed in a frame-shaped front cabinet disposed around a display panel for displaying an image, a box-shaped rear cabinet disposed on the rear side of the front cabinet, and the rear cabinet. The display device includes a box-shaped housing that stores a light source that emits light to the display panel. The housing includes a locking portion, and the rear cabinet is locked to the locking portion. And a locked portion for fixing the rear cabinet.

  In the present invention, the rear cabinet is fixed to the housing by the locked portion of the rear cabinet being locked to the locking portion formed in the housing. It is possible to reduce the number of screws used for fixing to the housing.

  In the display device according to the present invention, the casing is made of metal, and the locking portion is a claw portion formed by cutting and raising the casing.

  In the present invention, the locking portion is a claw portion formed by cutting and raising the housing, and the cutting and raising can be formed at the same time when the housing is pressed. It becomes possible to form a nail | claw part by up.

  In the display device according to the present invention, the locking portion is a hole formed in the housing.

  In the present invention, the locking portion is a hole. Since the hole can be formed at the same time when the casing is pressed, the hole can be formed at a slight cost increase.

  In the display device according to the present invention, the locked portion has a hook shape and protrudes from the inner surface of the rear cabinet.

  In the present invention, since the locked portion has a hook shape, the locked portion can be easily locked by the locking portion of the housing by pushing the rear cabinet from the back of the housing. It becomes.

  In the display device according to the present invention, the locked portion protrudes from the inner surface of the back portion of the rear cabinet, and the cross section parallel to the side surface of the rear cabinet has a horizontal U shape with the protruding end closed. The character-shaped lower surface has a triangular prism-shaped protrusion whose one side surface is parallel to the rear cabinet rear surface.

  In this invention, since the to-be-latched part is made into the horizontal U shape, it becomes possible to remove the to-be-latched part from a latching part, without using a tool.

  In the display device according to the present invention, the rear cabinet further includes a tool hole into which a tool for releasing the fixing of the rear cabinet to the housing is inserted.

  In the present invention, the rear cabinet further has a tool hole for inserting a tool for removing the rear cabinet from the casing, so that the rear cabinet can be easily detached from the casing by using a tool. It becomes.

  A television receiver according to the present invention includes the display device described above and a receiving unit that receives a television broadcast, and displays an image on the display device based on the television broadcast received by the receiving unit. It is made to do so.

  In the present invention, in the television receiver including the display device described above, the locked portion of the rear cabinet is locked to the locking portion formed in the casing, so that the rear cabinet is Since it is fixed to the casing, the number of screws used for fixing the rear cabinet to the casing can be reduced.

  In the present invention, the rear cabinet is fixed to the housing by the locked portion of the rear cabinet being locked to the locking portion formed in the housing. It is possible to reduce the number of screws used for fixing to the housing.

FIG. 2 is a schematic exploded perspective view illustrating a configuration example of a television receiver according to the first embodiment. It is a perspective view which shows the hook currently formed in the rear cabinet. It is a perspective view which shows the nail | claw part currently formed in the backlight chassis. 4 is a cross-sectional view of a main part of the television receiver according to Embodiment 1. FIG. It is the figure which looked at the backlight chassis 4 and the front cabinet 1 from the rear side. FIG. 3 is an explanatory diagram illustrating a method for removing a claw portion from a hook in the television receiver according to the first embodiment. 10 is a cross-sectional view of a main part of the television receiver according to Embodiment 2. FIG. 10 is a cross-sectional view of a main part of a television receiver according to Embodiment 3. FIG. FIG. 10 is a cross-sectional view of a lower part of a television receiver according to a fourth embodiment.

Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof.
Embodiment 1
FIG. 1 is a schematic exploded perspective view showing one configuration example of the television receiver according to Embodiment 1. FIG. As shown in the figure, the television receiver includes a front cabinet 1, a liquid crystal display module 2, a light source module 3, a backlight chassis 4, a plurality of circuit boards 5, and a rear cabinet 6.

  The front cabinet 1 has a frame shape and is arranged around the liquid crystal display module 2. The rear cabinet 6 has a box shape with one side opened, and accommodates the backlight chassis 4 and the like. The rear cabinet 6 is formed with a hook 6 a (a locked portion) that protrudes toward the backlight chassis 4.

The liquid crystal display module 2 (display panel) is composed of a rectangular liquid crystal panel, an optical sheet, and the like. The backlight chassis 4 (box-shaped housing) is a box-shaped housing having an opening on one surface. The backlight chassis 4 is formed of a metal such as iron, aluminum, or steel. The backlight chassis 4 is formed with claw portions 4a (locking portions). The liquid crystal display module 2 is configured to control the voltage applied to the liquid crystal to adjust the light transmittance and display an image on one surface. The light source included in the light source module 3 is, for example, an LED (Light Emitting Diode).
In the following description, the side on which the image of the television receiver is displayed is referred to as the front side, the opposite side of the front side is referred to as the rear side, the right side viewed from the front side is referred to as the right side, and the left side viewed from the front side is referred to as the left side. The upper side of the television receiver and the lower side of the television receiver are simply referred to as the upper side and the lower side.

  The circuit board group 5 includes a tuner board (receiving unit), an image processing board, an audio processing board, a power supply board, and the like. The tuner board receives a television broadcast and extracts a broadcast signal. The image processing board extracts image information from the broadcast signal and outputs the extracted image information to the liquid crystal display module 2. The audio processing board extracts audio information from the broadcast signal, and outputs the extracted audio information from a speaker unit (not shown). The power supply board supplies power of a predetermined voltage to each part of the television receiver.

  The light source module 3 is accommodated in the backlight chassis 4. The liquid crystal display module 2 and the backlight chassis 4 are attached to a frame-type front cabinet 1. A circuit board 5 is fixed to the outside of the rear surface of the backlight chassis 4, and the rear cabinet 6 is assembled to the front cabinet 1.

  FIG. 2 is a perspective view showing a hook 6 a formed in the rear cabinet 6. FIG. 3 is a perspective view showing the claw portion 4 a formed in the backlight chassis 4. FIG. 4 is a cross-sectional view of a main part of the television receiver according to the first embodiment. In FIG. 4, the description of the light source module 3 is omitted. The hook 6a is formed so as to protrude to the front side in a substantially vertical direction with respect to the back inner surface of the rear cabinet 6. There is a notch on the upper end of the hook 6a, and a step 6b is formed. A protrusion 6d having a triangular shape in side view is formed on the lower surface of the hook 6a. The protruding portion 6d is formed of an inclined surface that is inclined rearward and downward from the front end portion 6c and a surface that protrudes downward in parallel with the rear surface of the rear cabinet 6.

  As shown in FIG. 3, the claw portion 4a formed on the backlight chassis 4 is obtained by cutting and raising a part of the rear surface of the backlight chassis 4 into a strip shape. A recess 4b is formed on the rear surface of the backlight chassis 4, and a part thereof is cut into a strip shape. The claw portion 4 a has a shape that rises from the root in a direction perpendicular to the backlight chassis 4 and is then bent so as to be parallel to the backlight chassis 4. By forming the claw portion 4a, the hole portion 4c is formed.

  As shown in FIG. 4, the hook 6a formed on the rear cabinet 6 protrudes from the hole 4c into the backlight chassis 4, and the projection 6d and the claw portion 4a formed on the backlight chassis 4 fit. . A stepped portion 6b near the tip of the hook 6a is fitted to the upper side of the backlight chassis 4. By providing the step, it is possible to reduce the amount of light leaking from the light source module 3. A groove 6d provided on the lower side of the hook 6a fits with the claw 4a. By fitting the claw portion 4a into the groove portion 6d, the amount of light leaking from the light source module 3 can be reduced. By making the width in the left-right direction of the hook 6a and the width in the left-right direction of the claw portion 4a the same, it is possible to minimize the light of the light source module 3 leaking from the left and right of the hook 6a.

  When the hook 6a is locked to the claw portion 4a, the hook 6a is inserted from the front end portion 6c into the hole portion 4c at a position where the rear cabinet 6 is shifted slightly upward from the position where the rear cabinet 6 is coupled to the backlight chassis 4. When the rear surface of the portion 6 b hits the backlight chassis 4, the rear cabinet 6 may be returned to a height position where it is coupled to the backlight chassis 4. Since the upper and lower surfaces of the hook 6a are inclined, the claw portion 4a bends downward as the hook 6a is inserted into the hole 4c. When the rear cabinet 6 is returned to the height position where it is coupled to the backlight chassis 4, the claw portion 4a returns to its original state and locks the protruding portion 6d.

  As described above, the rear cabinet 6 is fixed to the backlight chassis 4 by fitting the hooks 6 a formed on the rear cabinet 6 and the claws 4 a formed on the backlight chassis 4. The hole 4c resulting from the formation of the claw portion 4a is closed when the hook 6a is fitted, so that the amount of light leaking from the light source module 3 can be reduced.

  A tool hole 6e is provided in the lower portion of the hook 6a of the rear cabinet 6. The tool hole 6e is a hole for inserting a tool used for releasing the locked state of the claw portion 6a. The tool hole 6e is provided at a position corresponding to the claw portion 4a, and the tip of the claw portion 4a can be seen from the tool hole 6e in a state where the hook 6a is locked to the claw portion 4a. The tool hole 6e also has a role as a heat dissipation hole.

  FIG. 5 is a view of the backlight chassis 4 and the front cabinet 1 as seen from the rear side. The claw portions 4a are provided at five places on the upper side of the backlight chassis 4, two places on each side, and one place on each side on the lower side. Below the front cabinet 1, there is a portion that is coupled to the rear cabinet 6, and a boss 10 for screwing is formed.

  FIG. 6 is an explanatory diagram showing a method of removing the claw portion 4a from the hook 6a in the television receiver according to the first embodiment. FIG. 6A shows a state in which the hook 6a is fitted in the claw portion 4a. FIG. 6B shows a state in which the claw portion 4a is bent in order to remove the hook 6a from the claw portion 4a. Since the backlight chassis 4 is made of a rigid metal, a tool is required to remove the claw portions 4a from the hooks 6a (to release the fixing of the rear cabinet 6 to the backlight chassis 4).

  As shown in FIG. 6B, in order to remove the claw portion 4a from the hook 6a, a tool T with a thin tip such as a screwdriver is inserted from the tool hole 6e, the claw portion 4a is bent downward, and the hook 6a is locked Is released. The rear cabinet 6 can be removed from the backlight chassis 4 by pulling the rear cabinet 6 to the rear side after releasing the locking state of all the hooks 6a.

  As described above, in the television receiver according to Embodiment 1, the rear cabinet 6 can be fixed to the backlight chassis 4 by fitting the hooks 6a and the claw portions 4a. Although screws are required to connect the rear cabinet 6 and the front cabinet 1, screws are not required to connect the rear cabinet 6 and the backlight chassis 4, reducing the number of parts and man-hours during assembly. In addition, the working time can be reduced.

Embodiment 2
FIG. 7 is a cross-sectional view of a main part of the television receiver according to the second embodiment. As in FIG. 4, the light source module 3 is not shown. The same components as those in the first embodiment are denoted by the same reference numerals.

  In the television receiver according to Embodiment 2, the claw portion is not formed in the backlight chassis 4, and the hole portion 4 c into which the hook 6 a formed in the rear cabinet 6 is fitted is formed. Further, the hook 6a is formed with a contact rib 6f for the backlight chassis 4. The horizontal width of the hook 6a and the horizontal width of the hole 4c have the same dimensions. Thereby, the light of the light source module 3 leaking from the left and right of the hook 6a can be minimized.

  The abutment rib 6f protrudes downward from the lower surface of the hook 6a. The downward protruding length of the abutment rib 6f is set to be lower than the lower end of the hole 4c in a state where the hook 6a is locked by the hole 4c. This is to prevent the hook 6a from sinking into the backlight chassis 4 when the rear cabinet 6 is pushed from the rear side near the hook 6a in a state where the hook 6a is coupled to the hole 4c. The lateral width of the abutment rib 6f is preferably equal to or larger than the lateral width of the hook 6a, but may be smaller than the lateral width of the hook 6a. As the lateral width of the abutment rib 6f is wider, the sinking of the hook 6a can be effectively prevented.

  In the hook 6a, the height from the lower end of the protruding portion 6d to the upper end of the stepped portion 6b is the same as or slightly lower than the height of the hole 4c. In this embodiment, since the hook 6a is locked in the hole 4c, it is difficult to turn the hook 6a into a locked state or to release the locked state by bending the backlight chassis 4. is there. Therefore, the dimensions described above are set so that the hook 6a is bent to be in the locked state or the locked state is released.

  As shown in FIG. 7, the projection 6d provided on the hook 6a is locked by the hole 4c. When the hook 6a is locked to the hole 4c, the hook 6a is inserted into the hole 4c from the tip 6c at a position where the rear cabinet 6 is shifted slightly upward from the coupling position, and the rear surface of the step 6b is back. When it hits the light chassis 4, the rear cabinet 6 may be returned to a height position where it is coupled to the backlight chassis 4. Since the upper surface and the lower surface of the hook 6a are inclined, the hook 6a is bent and enters the backlight chassis 4, and then the protrusion 6d is locked in the hole 4c.

  When the hook 6a is removed from the backlight chassis 4, a tool T with a thin tip such as a screwdriver is used. By inserting the tool T through the tool hole 6e and pushing up the abutment rib 6f, the hook 6a is bent upward and the locked state is released. The rear cabinet 6 can be removed from the backlight chassis 4 by pulling the rear cabinet 6 to the rear side after releasing the locking state of all the hooks 6a.

  In the second embodiment, in addition to the effects of the first embodiment, even when the rear cabinet 6 is pushed from the rear side, the abutment rib 6f hits the backlight chassis 4 so that the rear cabinet 6 It is possible to prevent sinking inside.

Embodiment 3
FIG. 8 is a cross-sectional view of a main part of the television receiver according to the third embodiment. The description of the light source module 3 is omitted as in FIGS. The same components as those in the first embodiment are denoted by the same reference numerals.

  In the television receiver according to the third embodiment, the hook 6a formed in the rear cabinet 6 has a horizontal U shape. As shown in FIG. 8, the hook 6a has a horizontal U-shaped cross section parallel to the side surface of the rear cabinet 6, that is, a vertical cross section cut in the vertical direction. The protruding end portion of the hook 6a is closed and is in the shape of a horizontal U in which the opposite direction is open.

  As shown in FIG. 8, the hook 6 a is fitted into a hole 4 b formed in the backlight chassis 4. A protrusion 6g is formed on the hook 6a. The protrusion 6g is formed on the lower surface of the hook 6a. The protruding portion 6 g has a triangular prism shape, and one side surface of the triangular prism is parallel to the back surface of the rear cabinet 6. The protruding length of the protruding portion 6g in the downward direction is configured to contact the inner surface of the backlight chassis 4 in a state where the hook 6a is locked in the hole portion 4c. Thereby, the rear cabinet 6 is fixed to the backlight chassis 4. A handle 6h is formed at the rear end of the hook 6a. Similarly to the second embodiment, the horizontal width of the hook 6a and the horizontal width of the hole 4c have the same dimensions. Thereby, the light of the light source module 3 leaking from the left and right of the hook 6a can be minimized.

  When the rear cabinet 6 is attached to the backlight chassis 4, the tip of the hook 6 a is inserted into the hole 4 c and the rear cabinet 6 is pushed in until the protrusion 6 g enters the backlight chassis 4. The hook 6a enters the backlight chassis 4 while being bent. When the protrusion 6g enters the backlight chassis 4, the deflection returns, and the protrusion 6g is locked in the hole 4c.

  When the rear cabinet 6 is removed from the backlight chassis 4, the handle 6h is pushed upward with a finger. By pushing up the handle 6h, the projection 6g is detached from the hole 4c, and the locked state is released. The rear cabinet 6 can be removed from the backlight chassis 4 by pulling the rear cabinet 6 to the rear side after releasing the locking state of all the hooks 6a.

  In the third embodiment, in addition to the effects of the first embodiment, the rear cabinet 6 can be removed without using a tool, and the maintainability is improved.

Embodiment 4
FIG. 9 is a cross-sectional view of the lower part of the television receiver according to the fourth embodiment. In the above-described first to third embodiments, as shown in FIG. 5, the screw fastening is performed at the place where the front cabinet 1 and the rear cabinet 6 below the television receiver are fastened. In the fourth embodiment, no screws are required for fastening the front cabinet 1 and the rear cabinet 6.

  As shown in FIG. 9, the front cabinet 1 is formed with a plate-like portion 1a that is substantially parallel to the installation surface of the television receiver and protrudes rearward. In the vicinity of the tip of the plate-like portion 1a, a protruding portion 6i protruding downward is formed. On the lower side of the rear cabinet 6 is formed a second plate-like portion that is substantially parallel to the installation surface of the television receiver and protrudes to the front side. A fitting hole 6j is formed in the second plate-like portion, and the position thereof is a position corresponding to the protrusion 6i. The front cabinet 1 and the rear cabinet 6 can be fastened by fitting the protrusion 1b and the fitting hole 6j. The widths of the first plate-like portion and the second plate-like portion are desirably the same size as the diameter of the screw-fixing boss. This is because the screw stopper can be changed to the above-described locking method without changing the configuration other than the screw stopper.

  When removing the rear cabinet 6 from the front cabinet 1, the plate-like portion 1a is pushed upward by a tool T having a thin tip such as a screwdriver. When the plate-like portion 1a is pushed up and the plate-like portion 1a bends, the protruding portion 1b is detached from the fitting hole 6j. If the rear cabinet 6 is pulled rearward after all the protruding portions 1b are removed from the fitting holes 6j, the rear cabinet 6 can be removed from the front cabinet 1.

  In the fourth embodiment, in addition to the place where the rear cabinet 6 and the backlight chassis 4 are fastened, the screw is not necessary for the place where the rear cabinet 6 and the front cabinet 1 are fastened. It is possible to reduce the number of man-hours and work time during assembly.

  The hooks and protrusions shown in the first to fourth embodiments are examples of the locked portion, and the claw portion, the hole portion, and the fitting hole portion are examples of the locking portion. You may employ | adopt the thing of shapes other than these illustrated as a to-be-latched part and a latching | locking part.

  Further, the above-described embodiment is an example in all respects, and should be considered not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Front cabinet 2 Liquid crystal display module 3 Light source module 4 Backlight chassis 4a Claw part 4b Hole part 5 Circuit board 6 Rear cabinet 6a Hook 6e Tool hole 6g Protrusion part

Claims (7)

A frame-shaped front cabinet placed around the display panel for displaying images;
A box-shaped rear cabinet disposed on the rear side of the front cabinet;
In a display device comprising a box-shaped housing housed in the rear cabinet and housing a light source for irradiating the display panel with light,
The housing has a locking portion,
The display device according to claim 1, wherein the rear cabinet includes a locked portion that is locked to the locking portion and fixes the rear cabinet. The display device according to claim 1, wherein the housing is made of metal, and the locking portion is a claw portion formed by cutting and raising the housing. The display device according to claim 1, wherein the locking portion is a hole formed in the housing. The display device according to claim 1, wherein the locked portion has a hook shape and protrudes from an inner surface of the rear cabinet. The locked portion protrudes from the inner surface of the back portion of the rear cabinet, and the cross section parallel to the side surface of the rear cabinet has a horizontal U shape with the protruding end closed, and the lower surface of the horizontal U shape is The display device according to any one of claims 1 to 3, further comprising a triangular prism-shaped protrusion whose side surface is parallel to the back surface of the rear cabinet. The display device according to any one of claims 1 to 4, wherein the rear cabinet further includes a tool hole into which a tool for releasing the fixation of the rear cabinet to the housing is inserted. A display device according to any one of claims 1 to 6,
A receiver for receiving television broadcasts,
A television receiver, wherein video is displayed on the display device based on the television broadcast received by the receiving unit.

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