WO2014192205A1

WO2014192205A1 - Substrate holder, electronic apparatus, and display device

Info

Publication number: WO2014192205A1
Application number: PCT/JP2014/001566
Authority: WO
Inventors: 谷口　善宏; 努菊池
Original assignee: パナソニック株式会社
Priority date: 2013-05-27
Filing date: 2014-03-19
Publication date: 2014-12-04

Abstract

A substrate holder (10) is provided with a base (20) which has convex portions (21), a circuit board (30) which has mounting holes (31) into which the convex portions (21) are to be inserted, and fastening members (40) for fastening the circuit board (30) to the base (20). The fastening members (40) are each provided with: a shaft portion (41b) which is to be fastened to a respective convex portion (21) when the convex portion (21) is inserted into a respective mounting hole (31); and a flange portion (42) which is provided on an end portion of the respective shaft portion (41b) on the opposite side from the base (20), and which abuts the circuit board (30) to restrict movement of the circuit board (30) in a direction opposite the base (20).

Description

Substrate holder, electronic device, and display device

The present disclosure relates to a substrate holder including a circuit board and a base for holding the circuit board, and an electronic apparatus such as a display device including the substrate holder.

Patent Document 1 discloses a shield structure in a plasma display device. In this plasma display device, a protrusion is provided on the outer periphery of the chassis member, and the back cover is attached in electrical contact with the protrusion. Thereby, the shield structure can be improved.

Patent Document 2 discloses a structure in which a circuit board is mounted on a chassis base in which a large number of bosses and supporting members are arranged in a plasma display device.

JP 2004-69888 A JP 2005-331948 A

The present disclosure provides a substrate holder including a substrate and a base for holding the substrate, the substrate holder capable of being thinned, and an electronic device and a display device including the substrate holder.

A substrate holder in the present disclosure includes a base having a convex part, a circuit board having an attachment hole into which the convex part is inserted, and a fixing member for fixing the circuit board to the base, and the fixing member is an attachment hole. The shaft is fixed to the convex portion inserted into the shaft, and is provided at the end opposite to the base of the shaft, and comes into contact with the circuit board in a direction opposite to the base of the circuit board. And a flange that regulates the movement of the.

The substrate holder in the present disclosure can be thinned, thereby realizing a thinned electronic device such as a display device.

FIG. 1 is a cross-sectional view showing a circuit board holding structure in a general electronic device. FIG. 2 is a perspective view showing a schematic configuration of the substrate holder in the first embodiment. FIG. 3 is an exploded perspective view showing an example of a circuit board holding structure in the first embodiment. FIG. 4 is a partially enlarged view around the boss in the AA cross section of FIG. FIG. 5 is a partial cross-sectional view around the boss of the substrate holder in the first modification of the first embodiment. FIG. 6 is a partial cross-sectional view around the boss of the substrate holder in the second modification of the first embodiment. FIG. 7 is a partial cross-sectional view around the boss of the substrate holder in the third modification of the first embodiment. FIG. 8 is a partial cross-sectional view around the boss of the substrate holder in the fourth modification of the first embodiment. FIG. 9 is a partial cross-sectional view around the boss of the substrate holder in the fifth modification of the first embodiment. FIG. 10 is a perspective view showing an appearance of the display device in the second embodiment. FIG. 11 is an exploded perspective view showing an outline of the structure of the display device according to the second embodiment. FIG. 12 is a partial cross-sectional view around the boss in the display device according to the second embodiment.

The inventors of the present application have found that the following problems occur with respect to conventional electronic devices such as display devices.

FIG. 1 is a cross-sectional view showing a holding structure of a circuit board 505 in a general electronic device 500.

Specifically, the electronic device 500 shown in FIG. 1 is a display device, and a display panel 501 that displays an image is bonded to a base 503 by an adhesive member 502. The adhesive member 502 is an adhesive double-sided tape or a double-sided adhesive sheet.

A convex boss 504 is formed on the base 503, and the circuit board 505 is held on the upper surface of the boss 504. The circuit board 505 is covered with a back cover 506 formed of resin or metal.

The holding structure of the circuit board 505 is as follows in more detail. That is, the circuit board 505 is disposed on the upper surface of the boss 504, and in this state, the screw 510 is screwed with a screw thread formed on the inner surface of a hole provided in the boss 504. In this way, the circuit board 505 and the base 503 are fastened.

In such a structure, the space corresponding to the height h of the boss 504 between the circuit board 505 and the base 503, that is, the axial length of the screw thread for fastening with the screw 510 is supported. Space is needed.

In other words, in the general electronic device 500 shown in FIG. 1, a gap corresponding to the height h of the boss 504 is inevitably generated between the circuit board 505 and the base 503. However, this is one factor that hinders the thickness reduction of the electronic device 500.

The present disclosure has been made on the basis of such knowledge, and as a result of intensive studies by the inventors of the present application, the idea of the structure of the substrate holder capable of being thinned was obtained.

Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

The inventors of the present application provide the accompanying drawings and the following description in order for those skilled in the art to fully understand the present disclosure, and are intended to limit the subject matter described in the claims. is not.

(Embodiment 1)
The first embodiment will be described below with reference to FIGS.

[1-1. Constitution]
FIG. 2 is a perspective view illustrating a schematic configuration of the substrate holder 10 according to the first embodiment.

FIG. 3 is an exploded perspective view showing an example of the holding structure of the circuit board 30 in the first embodiment.

FIG. 4 is a partially enlarged view around the boss 21 in the AA cross section of FIG.

In FIG. 4, a part of the cross section of the substrate holder 10 provided in the electronic device 90 is illustrated.

The substrate holder 10 in the first embodiment includes a base 20, a circuit board 30, and a fixing member 40.

The base 20 is a member that holds the circuit board 30 and is, for example, a member that is obtained by applying press processing or the like to a metal plate generally called a chassis. The base 20 has a boss 21 as shown in FIG.

The boss 21 is an example of a convex portion, and is provided integrally with the base 20 by, for example, pressing when the base 20 is molded. The boss 21 and the base 20 may be separate bodies. For example, the boss 21 may be provided on the base 20 by disposing the boss 21 manufactured as a resin molded product on the main surface of the base 20 (the surface on the side where the circuit board 30 is disposed). .

The circuit board 30 is, for example, a board in which an electric circuit composed of a plurality of electronic components 80 is arranged on a board body having a resin plate as a base material, and is held by the base 20.

The fixing member 40 is a member that fixes the circuit board 30 to the base 20. Specifically, as shown in FIG. 3, the boss 21 of the base 20 is inserted into the mounting hole 31 of the circuit board 30. In this state, the circuit board 30 is attached to the base 20 by the fixing member 40. Fixed.

The fixing member 40 includes a shaft portion 41b that is fixed to the boss 21 that is inserted into the mounting hole 31, and a flange portion 42 that is provided at the end of the shaft portion 41b opposite to the base 20.

In the present embodiment, a head portion 41a having an outer diameter larger than the outer diameter of the shaft portion 41b is provided at one end of the shaft portion 41b. Moreover, the collar part 42 is provided in the fixing member 40 as an annular member through which the shaft part 41b penetrates and is locked by the head part 41a.

That is, the fixing member 40 in the present embodiment includes the screw 41 composed of the shaft portion 41b and the head portion 41a, and the flange portion 42 that is an annular member. The flange portion 42 is realized by a washer made of, for example, metal or resin and having an outer diameter larger than the inner diameter of the mounting hole 31.

As described above, in the substrate holder 10, the circuit board 30 is fixed to the base 20 by the fixing member 40 in a state where the boss 21 provided on the base 20 is inserted into the mounting hole 31 of the circuit board 30. .

That is, as shown in FIG. 4, the circuit board 30 is placed in a space (a space on the side of the boss 21) that exists above the base 20 (in the protruding direction of the boss 21) and that corresponds to the height H of the boss 21. The circuit board 30 is held on the base 20 in a state where at least a part of the thickness is accommodated.

Specifically, the shaft portion 41 b is fixed to the boss 21 by screwing the shaft portion 41 b of the fixing member 40 with the female screw portion 22 of the boss 21. As a result, the collar portion 42 abuts on the circuit board 30, thereby restricting the movement of the circuit board 30 with the boss 21 inserted in the direction opposite to the base 20.

That is, in the electronic device 90 including the substrate holder 10, the distance between the plate-like member 91 to which the substrate holder 10 is attached and the cover 92 covering the substrate holder 10 is assumed to be the upper surface of the boss 21. It can be made shorter than the distance when it is fixed to (the surface of the boss 21 on the flange 42 side).

That is, simply speaking, the electronic device 90 includes the substrate holder 10 as a structure that holds the circuit board 30, so that the space between the plate-like member 91 and the cover 92 can be narrowed. The electronic device 90 can be thinned.

Thus, since the board | substrate holder | retainer 10 can accommodate the height of the boss | hub 21 in the thickness of the circuit board 30, it can suppress the influence which the height of the boss | hub 21 has on the thickness of the electronic device 90. .

Further, in the present embodiment, the fixing member 40 is realized with a simple configuration of the screw 41 and the collar portion 42 that is locked by the head portion 41a of the screw 41. Further, since the circuit board 30 is fixed by screwing the screw 41 with the female screw portion 22 of the boss 21, the circuit board 30 is fixed to the base 20 more firmly and surely.

When the fixing member 40 is made of metal, that is, when the metal screw 41 and the metal collar 42 are used, for example, the base 20 that is a metal chassis and the board body of the circuit board 30 Can be at the same potential. That is, the board body of the circuit board 30 can be grounded via the base 20.

Note that the type of the electronic device 90 is not particularly limited, and the electronic device 90 is realized as, for example, a display device such as a television, a digital camera, a video camera, or a mobile terminal. A display device including a substrate holder having the same characteristics as the substrate holder 10 will be described as a second embodiment.

Further, in the present embodiment, in order to electrically insulate between the metal base 20 and the circuit board 30, for example, a thin-film insulating member 29 made of resin is used as the base 20 and the circuit board. 30. The total thickness of the insulating member 29 and the circuit board 30 is larger than the height H of the boss 21.

Therefore, when the screw 41 is screwed into the female screw portion 22 of the boss 21, the circuit board 30 is urged to the base 20 by the elasticity of the flange portion 42, and the circuit board 30 is fixed in this state. Thereby, the circuit board 30 is stably fixed to the base 20.

In addition, when there is no need for electrical insulation between the back surface (surface on the base 20 side) of the circuit board 30 and the base 20, the insulating member 29 is unnecessary. The case where the electrical insulation is not necessary is exemplified when the wiring pattern, the electronic component, a part of the electronic component, and the like are not exposed on the back surface of the circuit board 30. Further, as the case where the electrical insulation is not necessary, the back surface of the circuit board 30 is only a ground pattern and a solid ground, the back surface of the circuit board 30 is covered with an insulator, and the base 20 The case where is formed of a non-conductive material is also exemplified.

Further, since the boss 21 is inserted into the mounting hole 31 of the circuit board 30, the circuit board 30 can be brought into close contact with the base 20 directly or through the insulating member 29. In this case, the base 20 can also be used as a radiator for heat generated in the circuit board 30. It is also possible to ground the board body of the circuit board 30 via the base 20 made of metal.

Here, the structure of the substrate holder that achieves the effect of reducing the thickness of the electronic device 90 described above, that is, the structure in which the height of the boss 21 can be accommodated within the thickness of the circuit board 30 is shown in FIGS. It is not limited to the structure shown.

Therefore, various modifications of the substrate holder will be described below with a focus on differences from the substrate holder 10 described above.

[1-2. Modification 1]
FIG. 5 is a partial cross-sectional view around the boss 21 of the substrate holder 11 in the first modification of the first embodiment.

The substrate holder 11 shown in FIG. 5 includes a base 20, a circuit board 30, and a fixing member 43. The base 20 has a boss 21, and the circuit board 30 has an attachment hole 31 into which the boss 21 is inserted.

The fixing member 43 includes a shaft portion 43b and a flange portion 43a provided at an end portion of the shaft portion 43b. The shaft portion 43 b is a member that functions as a male screw, like the shaft portion 41 b in the substrate holder 10, and is fixed to the boss 21 by screwing with the female screw portion 22 of the boss 21.

Unlike the flange portion 42 in the substrate holder 10, the flange portion 43a in the present modification is provided integrally with the shaft portion 43b. That is, the collar part 43a is comprised by the head of the fixing member 43 implement | achieved as a screw | thread.

In the substrate holder 11 having the above configuration, the shaft portion 43b of the fixing member 43 is fixed to the boss 21 inserted into the mounting hole 31 of the circuit board 30. As a result, the flange portion 43a abuts on the circuit board 30, thereby restricting the movement of the circuit board 30 with the boss 21 inserted in the direction opposite to the base 20.

That is, in the substrate holder 11, as shown in FIG. 5, in the state where at least a part of the thickness of the circuit board 30 is accommodated in the space on the side of the boss 21 that exists above the base 20. The substrate 30 is held.

Therefore, the substrate holder 11 in the present modification has a structure that can be reduced in thickness, whereby the electronic device 90 including the substrate holder 11 can also be reduced in thickness.

[1-3. Modification 2]
FIG. 6 is a partial cross-sectional view around the boss 21 of the substrate holder 12 in the second modification of the first embodiment.

The substrate holder 12 shown in FIG. 6 includes a base 20, a circuit board 30, and a fixing member 44. The base 20 has a boss 21, and the circuit board 30 has an attachment hole 31 into which the boss 21 is inserted.

The fixing member 44 has a shaft portion 44b and a flange portion 44a provided at an end portion of the shaft portion 44b.

The shaft portion 44b in this modification has a claw portion 44c provided at the end opposite to the flange portion 44a, and the boss 21 has an engagement portion 24 that engages with the claw portion 44c.

Specifically, the engaging portion 24 is configured by a shaft hole formed in the boss 21 into which the shaft portion 44b is inserted and its peripheral edge.

Here, the fixing member 44 in the present modification is formed of, for example, a resin having a predetermined elasticity, and the claw portion 44c is inserted into the engaging portion 24 in a deformed state so as to reduce the outer diameter.

Furthermore, when the claw portion 44c penetrates the engaging portion 24, it is restored to its original shape by elasticity, and as a result, as shown in FIG. 6, it engages with the boss 21 (engaging portion 24). Thereby, the shaft portion 44b is fixed so as not to come out of the boss 21.

That is, in the substrate holder 12, the shaft portion 44 b of the fixing member 44 is fixed to the boss 21 that is inserted into the mounting hole 31 of the circuit substrate 30. As a result, the flange portion 44a comes into contact with the circuit board 30, thereby restricting the movement of the circuit board 30 with the boss 21 inserted in the direction opposite to the base 20.

That is, in the substrate holder 12, as shown in FIG. 6, in the state where at least a part of the thickness of the circuit board 30 is accommodated in the space on the side of the boss 21 that exists above the base 20. The substrate 30 is held.

Therefore, the substrate holder 12 in the present modification has a structure that can be reduced in thickness, whereby the electronic device 90 including the substrate holder 12 can also be reduced in thickness.

Further, since the fixing member 44 is fixed to the boss 21 by utilizing the elastic deformation of the claw portion 44c, the attaching process of the fixing member 44 to the boss 21 is simplified. Even if the tip of the claw portion 44c comes into contact with the plate-like member 91, damage to the plate-like member 91 is suppressed by the elastic deformation of the claw portion 44c.

Further, the circuit board 30 is fixed to the base 20 in a state of being biased by the base 20 due to the elasticity of the flange portion 44a. Thereby, the circuit board 30 is stably fixed to the base 20.

The fixing member 44 only needs to have at least the claw portion 44c elastically deformable, and the material of the fixing member 44 is not limited to resin. For example, the fixing member 44 may be made of metal. In this case, as described above, the board body of the circuit board 30 can be grounded via the base 20.

Note that at least a part of the fixing member 44 is elastically deformed and the effect thereof is the same in the fixing member 45 in Modification 3 described below.

[1-4. Modification 3]
FIG. 7 is a partial cross-sectional view around the boss 21 of the substrate holder 13 in the third modification of the first embodiment.

7 includes a base 20, a circuit board 30, and a fixing member 45. The substrate holder 13 shown in FIG. The base 20 has a boss 21, and the circuit board 30 has an attachment hole 31 into which the boss 21 is inserted.

The fixing member 45 has a shaft portion 45b and a flange portion 45a provided at an end portion of the shaft portion 45b.

The shaft portion 45b in this modification has a claw portion 45c provided at the end opposite to the flange portion 45a, and the boss 21 has an engagement portion 25 that engages with the claw portion 45c.

In addition, the engaging part 25 has the auxiliary member 60 which engages with the nail | claw part 45c arrange | positioned in the shaft hole into which the shaft part 45b of the boss | hub 21 is specifically inserted.

Here, the shaft hole into which the shaft portion 45b is inserted is formed in the boss 21 by punching the boss 21 formed of, for example, a metal plate material.

As a result, the reliability of the engagement between the peripheral edge and the claw portion 45c, such as the generation of burrs at the peripheral edge of the lower opening in FIG. An event that decreases gender may occur.

Therefore, for example, by arranging the auxiliary member 60 as shown in FIG. 7 in the engaging portion 25, a portion that is more easily engaged with the claw portion 45c can be easily and intentionally created. As a result, the reliability of engagement (hook) between the engaging portion 25 and the claw portion 45c is improved.

Further, as compared with the case where the auxiliary member 60 is not present, the distance from the collar portion 45a to the claw portion 45c increases by the thickness of the auxiliary member 60. As a result, for example, the formation of the claw portion 45c in the fixing member 45 is facilitated.

Further, in the substrate holder 13, as shown in FIG. 7, in the state where at least a part of the thickness of the circuit board 30 is accommodated in the space on the side of the boss 21 that exists above the base 20. The substrate 30 is held.

Therefore, the substrate holder 13 in the present modification has a structure that can be reduced in thickness, and thus the electronic device 90 including the substrate holder 13 can also be reduced in thickness.

[1-5. Modification 4]
FIG. 8 is a partial cross-sectional view around the boss 21 of the substrate holder 14 in the fourth modification of the first embodiment.

8 includes a base 20, a circuit board 30, and a fixing member 40. The base 20 has a boss 21, and the circuit board 30 has an attachment hole 31 into which the boss 21 is inserted.

That is, the substrate holder 14 includes the fixing member 40 as in the substrate holder 10 in the first embodiment described with reference to FIGS. 2 to 4, and the fixing member 40 includes the head portion 41a and the shaft portion 41b. And a flange 41 that is an annular member. Further, the shaft portion 41 b is fixed to the boss 21 inserted in the mounting hole 31 of the circuit board 30. As a result, the collar portion 42 abuts on the circuit board 30, thereby restricting the movement of the circuit board 30 in the direction opposite to the base 20.

Further, as shown in FIG. 8, the circuit board 30 is mounted on the base 20 in a state where at least a part of the thickness of the circuit board 30 is accommodated in the space on the side of the boss 21 that exists above the base 20. The substrate holding body 10 in the first embodiment is also the same as the substrate holding body 10 in the first embodiment.

However, the substrate holder 14 is different from the substrate holder 10 in the first embodiment in that there is a gap between the base 20 and the circuit board 30.

Specifically, the substrate holder 14 separates the circuit board 30 and the base 20 so that the circuit board 30 and the main surface 20a, which is the surface on which the bosses 21 of the base 20 are disposed, are disposed. A separation portion 21a for forming a gap is provided.

In this modification, the separation portion 21a is formed by a step provided by the boss 21.

In addition, the separation part 21a does not need to be formed in the boss 21, and can be realized by, for example, an annular member made of resin or the like disposed so that the boss 21 penetrates.

Also, the separation portion 21 a can be realized by a surface (back surface) of the circuit board 30 on the base 20 side or a protrusion formed on the main surface 20 a of the base 20.

Thus, the substrate holder 14 can hold the circuit board 30 in a state of floating from the main surface 20 a of the base 20.

Thereby, for example, even when an electronic component or a part of the electronic component is disposed on the back surface of the circuit board 30, the circuit board 30 can be attached to the base 20.

Further, for example, when it is desired to suppress heat conduction from one to the other of the circuit board 30 and the plate-like member 91 on which the base 20 is installed, the circuit board 30 and the main surface 20a of the base 20 It is advantageous that there is a gap between them.

That is, according to the board | substrate holding body 14 provided with the separation part 21a, the effect of protecting each of the circuit board 30 and the electronic device 90 from the heat which generate | occur | produces on the other side is also show | played.

In FIG. 8, the insulating member 29 is disposed only between the back surface of the circuit board 30 and the separation portion 21 a, but the insulating member 29 may also be disposed on the main surface 20 a of the base 20. Further, the insulating member 29 may be omitted if the back surface of the circuit board 30 is formed of a ground pattern or the like that does not cause a problem even if the back surface of the circuit board 30 is in contact with the separation portion 21a. Further, if the diameter of the insulating member 29 is increased, the fastening holding area can be expanded, and the fastening stability and reliability are expected to be improved.

As described above, the substrate holder 14 in the present modification has a structure that can be thinned, and thus the electronic device 90 including the substrate holder 11 can be thinned. Further, according to the substrate holder 14, in addition to this thinning effect, the effect of increasing the types of circuit boards 30 that can be held, and suppressing heat conduction from the circuit board 30 to other members, etc. Is also played.

[1-6. Modification 5]
FIG. 9 is a partial cross-sectional view around the boss 23 of the substrate holder 15 in the fifth modification of the first embodiment.

A substrate holder 15 shown in FIG. 9 includes a base 20, a circuit board 30, and a fixing member 46. The base 20 has a boss 23 which is a member different from the base 20 and is joined to the base 20 by caulking or welding, and the circuit board 30 has a mounting hole 31 into which the boss 23 is inserted.

The fixing member 46 includes a screw 47 including a head portion 47a having a thin flat head shape and a shaft portion 47b, and a flange portion 42 that is an annular member. Further, the shaft portion 47 b is fixed to the boss 23 inserted in the mounting hole 31 of the circuit board 30. As a result, the collar portion 42 abuts on the circuit board 30, thereby restricting the movement of the circuit board 30 in the direction opposite to the base 20.

Further, the circuit board 30 is held on the base 20 in a state where at least a part of the thickness of the circuit board 30 is accommodated in a space on the side of the boss 23 existing above the base 20.

Note that the thickness of the thin flat head of the head 47a of the screw 47 is preferably 0.2 mm to 1.5 mm, more preferably 0.2 mm to 0.6 mm.

The boss 23 in this modification is manufactured as a separate member from the base 20. As a result, in the female screw portion 22 of the boss 23 screwed with the shaft portion 47b, for example, instability of the plate thickness caused by burring, and the uncertainties associated with rolling or cutting are eliminated. As a result, the reliability of the fastening fastening of the fixing member 46 to the boss 23 is improved.

Further, since the head 47a of the screw 47 is formed in a thin flat head shape, the cover 92 can be disposed closer to the plate-like member 91, so that the electronic device 90 including the substrate holder 15 is further thinned. Can be realized.

(Embodiment 2)
Next, the second embodiment will be described with reference to FIGS.

[2-1. Outline of display device configuration]
FIG. 10 is a perspective view showing an appearance of display device 100 according to the second embodiment.

FIG. 11 is an exploded perspective view showing an outline of the structure of the display device 100 according to the second embodiment. In FIG. 11, in order to clarify the characteristics of the structure of the display apparatus 100, some components such as various cables and electronic components are not shown.

The display device 100 according to the present embodiment includes a display panel 101 and a substrate holder 110. The display device 100 is, for example, a television that outputs video and audio obtained from received broadcast waves and the like.

More specifically, as shown in FIG. 11, the display device 100 further includes a back cover 106 that covers the substrate holder 110 and a frame body 108 that covers the periphery of the display panel 101.

That is, the display device 100 has a structure in which the display panel 101 and the substrate holder 110 are disposed between the frame body 108 and the back cover 106.

The display panel 101 is a device that displays an image. The display panel 101 is, for example, an organic EL display panel having, as a light emitting element, an organic EL (Electro Luminescence) diode that is a light emitting diode having a light emitting layer made of an organic compound. The thickness is, for example, about 1 mm to 3 mm.

The type of the display panel 101 is not particularly limited. For example, it may be a plasma display panel that is a self-luminous display panel similar to the organic EL display panel, or a liquid crystal display panel having a backlight unit.

The substrate holder 110 is a structure having characteristics common to the substrate holder 10 in the first embodiment.

Specifically, the substrate holder 110 includes a base 120, a circuit board 130, and a fixing member 140 that fixes the circuit board 130 to the base 120. Details of the substrate holder 110 will be described later with reference to FIG.

In the present embodiment, the circuit board 130 is a board having a scan drive circuit that supplies a scan drive signal to the display panel 101 via each of the plurality of scan lines 139.

In FIG. 11, the circuit board 130 is illustrated as a vertically long board arranged along the left and right sides of the base 120 that is a metal chassis.

In addition to the plurality of circuit boards 130, the base 120 is also provided with a plurality of circuit boards 150 each having a signal line driving circuit that supplies a signal voltage to the display panel 101 via each of the plurality of signal lines 159. ing. In FIG. 11, the circuit board 150 is illustrated as a horizontally long board disposed along the upper and lower sides of the base 120.

Note that the scan driver circuit is also called a gate driver or a scan driver, and the signal line driver circuit is also called a data driver or a source driver.

In addition to these

circuit boards

130 and 150, other types of circuit boards (

circuit boards

160, 161, 162) are also arranged on the base 120.

Each of the

circuit boards

160, 161, 162 has an electric circuit, for example, a signal processing circuit that processes a received video signal, a control circuit that controls the operation of the scanning drive circuit and the signal line drive circuit, or power to the outside A power supply circuit that receives the data from the power supply and supplies it to each circuit.

In FIG. 11, the scanning lines 139 and the signal lines 159 are conceptually represented by dotted lines. Actually, the display panel 101 is connected to each circuit board 130 and each circuit board 150 by, for example, a flexible cable having a plurality of scanning lines 139 or signal lines 159.

In addition, the flexible cable connected to the circuit board 130 (150) is folded inwardly outside the base 120, and in this state, the circuit board 130 (150) is joined to the back surface of the display panel 101. It is fixed to the end of the base 120.

That is, the display panel 101 is electrically connected to the circuit board 130 (150), and is disposed on the opposite side of the circuit board 130 (150) with the base 120 interposed therebetween.

As described above, a plurality of circuit boards are arranged on the base 120. In order to clearly describe the characteristics of the board holder 110 of the present embodiment, attention is paid to one circuit board 130, and The following description will focus on the holding structure for the circuit board 130.

[2-2. Configuration of substrate holder]
FIG. 12 is a partial cross-sectional view around the boss 121 in the display device 100 according to the second embodiment.

As shown in FIG. 12, the substrate holder 110 according to the second embodiment includes a base 120, a circuit substrate 130, and a fixing member 140. The base 120 has a boss 121, and the circuit board 130 has a mounting hole 131 into which the boss 121 is inserted.

The base 120 is bonded to the display panel 101 by an adhesive member 102 such as a double-sided tape or a double-sided adhesive sheet.

Also, an insulating member 129 that electrically insulates the base 120 and the circuit board 130 is disposed between the base 120 and the circuit board 130.

The fixing member 140 includes a shaft portion 141b and a flange portion 142 provided at an end portion of the shaft portion 141b.

A head portion 141a having an outer diameter larger than the outer diameter of the shaft portion 141b is provided at one end of the shaft portion 141b. Moreover, the collar part 142 is provided in the fixing member 140 as an annular member through which the shaft part 141b passes and is locked by the head part 141a.

That is, the fixing member 140 in the present embodiment has a screw 141 composed of a shaft portion 141b and a head portion 141a, and a collar portion 142 that is an annular member. The flange 142 is realized by, for example, a washer made of metal or resin and having an outer diameter larger than the inner diameter of the mounting hole 131.

In the substrate holder 110 configured as described above, the boss 121 provided on the base 120 is inserted in the mounting hole 131 of the circuit board 130 in the direction opposite to the base 120 of the circuit board 130. Is restricted by the collar 142.

In addition, as the dimension in the thickness direction of each component described above, the following values are exemplified. That is, the thickness of the base 120 is 0.6 mm, the thickness of the insulating member 129 is 0.15 mm, and the thickness of the circuit board 130 is 1.0 mm.

In this case, the height H of the boss 121 is smaller than 1.15 mm (for example, 1.0 mm), and the length of the shaft 141b of the screw 141 is, for example, 2.0 mm. Moreover, the thickness of the collar part 142 is 0.5 mm, for example, and this substantially corresponds with the length of the incomplete thread part of the axial part 141b. That is, the portion of the shaft portion 141b that is not used as a male screw is used to connect the shaft portion 141b and the flange portion 142, so that the flange portion 142 does not impair the function of the shaft portion 141b as a male screw. .

As described above, the substrate holder 110 according to the second embodiment has structural features in common with the substrate holder 10 according to the first embodiment described above.

That is, as shown in FIG. 12, the circuit board 130 is placed in a space (a space on the side of the boss 121) that exists above the base 120 (in the protruding direction of the boss 121) and that corresponds to the height H of the boss 121. The circuit board 130 is held on the base 120 in a state where at least a part of the thickness is accommodated.

Therefore, in the display device 100 including the substrate holder 110, the distance between the display panel 101 and the back cover 106 is made shorter than the distance when the circuit board 130 is fixed to the upper surface of the boss 121. Can do.

As described above, according to the substrate holder 110, the height of the boss 121 for holding the circuit board 130 can be accommodated within the thickness of the circuit board 130. As a result, the display device 100 can be thinned. It becomes.

Here, the circuit board 130 is a board having a scanning drive circuit, and is a board directly connected to the display panel 101 by a flexible cable or the like. For this reason, it is preferable to be disposed at a position close to the display panel 101, that is, at an end of the base 120 that is a chassis of the display device 100.

In addition, since the scanning drive circuit can be configured without arranging electronic components or the like on the back surface of the substrate, the back surface of the circuit substrate 130 is brought into close contact with the base 120 directly or through the insulating member 129. Is possible.

By adopting the substrate holder 110 as a structure for holding such a circuit board 130, a portion corresponding to the end of the base 120 in the display device 100 can be thinned.

That is, the peripheral portion of the display device 100 can be made thinner than before.

For example, as shown in FIG. 12, it is assumed that the back cover 106 of the display device 100 is tilted so as to approach the base 120 toward the outside (left side in FIG. 12).

In this case, according to the substrate holder 110, at least a part of the thickness of the circuit board 130 is accommodated in the space corresponding to the height H of the boss 121 of the base 120, so that the back cover 106 is tilted more greatly. Can do. Therefore, the thickness of the outermost part of the display device 100 (in FIG. 12, the leftmost part of the display device 100) can be reduced.

This is preferable, for example, in that the display device 100 can be made thinner in appearance.

As described above, the display device 100 of the present embodiment can be thinned by including the substrate holder 110 as a structure that holds a substrate such as the circuit board 130.

Here, in the display device 100 of the present embodiment, like the substrate holder 10 in the first embodiment, the shaft portion of the fixing member is screwed into the female screw portion of the boss, and the circuit board is formed by the collar portion that is an annular member. A substrate holder 110 having a structure for restricting the movement of the substrate.

However, any of the substrate holders (11, 12, 13, 14) corresponding to the various modified examples (modified examples 1 to 4) of the first embodiment described above is the substrate such as the circuit board 130 in the display device 100. It may be provided as a structure that holds

Further, for example, the substrate holder 110 may have different types of holding structures.

For example, the substrate holder 110 employs the structure shown in FIG. 12 as a structure for holding the

circuit boards

130 and 150, and the substrate holder 14 shown in FIG. 8 as a structure for holding the

circuit boards

160, 161, 162. A holding structure (a structure having a separation portion) may be adopted.

(Other embodiments)
As described above, Embodiments 1 and 2 have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to an embodiment in which changes, replacements, additions, omissions, and the like are appropriately performed. Moreover, it is also possible to combine each component demonstrated in the said Embodiment 1 and 2 into a new embodiment.

Therefore, other embodiments will be exemplified below.

For example, in the first embodiment, the outer diameter of the flange portion 42 is larger than the inner diameter of the attachment hole 31, but the relationship between the size of the flange portion 42 and the attachment hole 31 is not limited thereto.

That is, the relationship between the size of the flange 42 and the attachment hole 31 may be such that the flange 42 provided in the fixing member 40 does not come out of the attachment hole 31. For example, when the outer shape of the collar portion 42 is an ellipse, the major axis may be larger than the inner diameter of the attachment hole 31.

Further, the shape of the mounting hole 31 included in the circuit board 30 is not necessarily a round hole, but may be a square hole. That is, the mounting hole 31 may be any size and shape that allows the boss 21 to be inserted and that restricts the movement of the circuit board 30 in the direction opposite to the base 20 by the flange 42.

Further, the shape of the collar portion 42 is not necessarily a circle or an ellipse with the shaft portion 41b as the center, and may be a shape constituted by a polygon or a straight line and a curve.

For example, in FIG. 4, the flange portion 42 extends on both the left and right sides of the shaft portion 41 b and is arranged so as to press the left and right peripheral edges of the attachment hole 31. It may be arranged so as to hold only one peripheral edge. That is, the fixing member 40 may be L-shaped as a whole.

In the first embodiment, the total thickness of the insulating member 29 and the circuit board 30 is greater than the height H of the boss 21. That is, the upper surface of the boss 21 is positioned below the main surface of the circuit board 30 (the surface opposite to the base 20).

However, the upper surface of the boss 21 may be positioned above the main surface of the circuit board 30. In short, a part of the boss 21 may protrude from the mounting hole 31 of the circuit board 30.

Even in this case, for example, if the flange 42 is bent or bent downward or has a portion protruding downward, the flange 42 abuts against the circuit board 30. It is possible to make it. In other words, it is possible to regulate the movement of the circuit board 30 in the direction opposite to the base 20 by the collar portion 42.

Note that these supplementary matters regarding the fixing member 40 and its surrounding structure are the fixing member (43, 44, 45, 140) and its surrounding structure in the first to fourth modifications of the first embodiment and the second embodiment. Also applies.

In the second embodiment, the display device 100 is a television. However, the display device 100 may be realized as a device including a display panel other than the television.

For example, the display device 100 includes a monitor display that displays images input from the outside, digital signage that is used as an advertising medium, a portable terminal that accepts user operations via a touch panel, a tablet terminal, and a table-type display device. It may be realized as.

As described above, the embodiments have been described as examples of the technology in the present disclosure. For this purpose, the accompanying drawings and detailed description are provided.

Accordingly, among the components described in the accompanying drawings and the detailed description, not only the components essential for solving the problem, but also the components not essential for solving the problem in order to illustrate the above technique. May also be included. Therefore, it should not be immediately recognized that these non-essential components are essential as those non-essential components are described in the accompanying drawings and detailed description.

In addition, since the above-described embodiment is for illustrating the technique in the present disclosure, various modifications, replacements, additions, omissions, and the like can be performed within the scope of the claims or an equivalent scope thereof.

The present disclosure is a substrate holder that includes a substrate and a base that holds a circuit board, and can be applied to a substrate holder that is required to be thin. Specifically, the present disclosure is applicable to electronic devices such as a television, a monitor display, a digital signage, a mobile terminal, a tablet terminal, and a table type display device.

10, 11, 12, 13, 14, 15, 110

Substrate holder

20, 120 Base

20a Main surface

21, 23, 121 Boss 21a Separation part 22

Female thread part

24, 25

Engagement part

29, 129 Insulating

member

30, 130, 150, 160, 161, 162

Circuit board

31, 131 Mounting

hole

40, 43, 44, 45, 46, 140 Fixing

member

41, 47, 141

Screw

41a, 47a,

141a Head

41b, 43b, 44b, 45b, 47b, 141b,

shaft portion

42, 43a, 44a, 45a, 142

collar portion

44c, 45c claw portion 60 auxiliary member 80 electronic component 90 electronic device 91 plate member 92 cover 100 display device 101 display panel 102 adhesive member 106 back cover 108 Frame 139 Scanning line 159 Signal line

Claims

A base having a convex part;
A circuit board having a mounting hole into which the convex portion is inserted;
A fixing member for fixing the circuit board to the base,
The fixing member is
A shaft portion fixed to the convex portion inserted into the mounting hole;
Provided at an end of the shaft portion opposite to the base, and having a flange that restricts movement of the circuit board in a direction opposite to the base by contacting the circuit board body.
The convex portion has a female screw portion,
The substrate holder according to claim 1, wherein the shaft portion is fixed to the convex portion by screwing with the female screw portion.
At one end of the shaft portion, a head having an outer diameter larger than the outer diameter of the shaft portion is provided,
The substrate holder according to claim 2, wherein the flange portion is an annular member that penetrates the shaft portion and is locked by the head portion.
The shaft portion has a claw portion provided at an end opposite to the collar portion,
The board | substrate holding body of Claim 1. The said convex part has an engaging part which fixes the said axial part by engaging with the said nail | claw part inserted in the said convex part.
The substrate holder according to claim 4, wherein the engaging portion includes an auxiliary member that engages with the claw portion, which is disposed in a shaft hole into which the shaft portion formed on the convex portion is inserted.
Furthermore, it has a separation part which forms a space | gap between the said circuit board and the main surface which is the surface where the said convex part of the said base is arrange | positioned by separating the said circuit board and the said base. Item 6. The substrate holder according to any one of Items 1 to 5.
The substrate holder according to claim 6, wherein the separation portion is formed by a step provided by the convex portion.
The substrate holder according to any one of claims 1 to 7, wherein the fixing member is made of metal.
An electronic device comprising the substrate holder according to any one of claims 1 to 8.
A substrate holder according to any one of claims 1 to 8,
A display panel for displaying an image, wherein the display panel is electrically connected to the circuit board, and is disposed on the opposite side of the circuit board across the base,
A display device comprising: