JP5702654B2 - Display device and method for assembling display device - Google Patents

Description

  The present invention relates to a display device and a method for assembling the display device.

  2. Description of the Related Art Conventionally, in a display device, a display panel that displays information and a circuit board provided with a display panel drive circuit and the like are generally connected by a flexible substrate. Here, in the flexible substrate, a bent portion may interfere with other members.

  In such a case, the flexible substrate may be damaged by interference with other members. Such breakage of the flexible substrate can be prevented by separately providing a protective member or the like for protecting the bent portion of the flexible substrate (see, for example, Patent Document 1).

JP 11-68338 A

  However, when a protective member for protecting the flexible substrate is separately provided in the display device, the cost of the display device increases. Therefore, how to realize a display device capable of preventing the flexible substrate from being damaged while suppressing an increase in cost is a major issue.

  The present invention has been made in view of the above, and an object of the present invention is to provide a display device capable of preventing damage to a flexible substrate while suppressing an increase in cost.

  In order to solve the above-described problems and achieve the object, a display device according to the present invention includes a display panel fixed inside a housing by a fixture, and a position where the display device is pulled out from the display panel and overlaps the fixture. A flexible board that is connected to the circuit board via the via, an operating portion provided in the vicinity of the fixture, and a tongue piece that is inserted between the fixture and the flexible board is formed on the outer periphery, And an elastic member that is elastically deformed to electrically short-circuit between contacts provided on the predetermined circuit board when the operation unit is operated by being attached to the back surface of the operation unit. .

  According to the present invention, it is possible to provide a display device capable of preventing the flexible substrate from being damaged while suppressing an increase in cost.

FIG. 1 is a schematic diagram illustrating an appearance of a display device according to an embodiment. FIG. 2 is a schematic diagram illustrating a structure inside the housing of the display device according to the embodiment. 3 is a schematic cross-sectional view of the display device taken along line AA shown in FIG. FIG. 4 is a diagram illustrating an assembly process of the display device according to the example. FIG. 5 is a schematic view showing a part of a display device in which an insulating sheet is provided as a buffer material.

  Exemplary embodiments of a display device and a method for assembling the display device according to the present invention will be described below in detail with reference to the accompanying drawings. Hereinafter, a car audio display device mounted on a vehicle will be described as an example. However, the present invention is not limited to a display device mounted on a vehicle, and can be applied to any display device.

  FIG. 1 is a schematic diagram illustrating an appearance of a display device 1 according to an embodiment. As shown in FIG. 1, the display device 1 includes a display panel 3 that displays information in the center of a housing 2. The display panel 3 is a thin display device such as a liquid crystal display device.

  In the display device 1, a plurality of operation buttons 4 are arranged on both sides of the display panel 3. The operation buttons 4 are switches that are pressed when the user uses various functions provided in the car audio, for example.

  The display panel 3 included in the display device 1 is connected to a predetermined circuit board inside the housing 2 and is driven by a driving unit provided on the circuit board to display various information. Further, the display panel 3 and the circuit board are connected by a flexible board having flexibility.

  Next, the internal structure of the housing 2 of the display device 1 will be described with reference to FIG. FIG. 2 is a schematic diagram illustrating a structure inside the housing 2 of the display device 1 according to the embodiment. FIG. 2 shows the back surface of the housing 2 on which the display panel 3 and the like are mounted.

  As shown in FIG. 2, the display panel 3 is held by the panel holder 5, and the four corners of the panel holder 5 are screwed to the back surface of the housing 2 by screws 51, so that the peripheral portion is inside the housing 2. Fixed. In addition, the fixing tool which fixes the display panel 3 to the inside of the housing | casing 2 is not limited to the screw 51, For example, arbitrary fixing tools, such as a rivet and a volt | bolt, can be used.

  Further, elastic members 6 and 7 are attached to the back of the operation buttons 4 provided on both sides of the display panel 3 with the display panel 3 interposed therebetween. Such elastic members 6 and 7 are formed, for example, by injection molding silicon rubber. The elastic members 6 and 7 are not limited to silicon rubber, and may be formed of any material having elasticity.

  The elastic members 6 and 7 are formed with rubber switches 61 and 71 that are elastically deformed when the operation buttons 4 are pressed at positions corresponding to the operation buttons 4. The specific shapes of the elastic members 6 and 7 will be described later with reference to FIG.

  Furthermore, a circuit board 8 provided with a drive unit or the like for driving the display panel 3 is attached inside the housing 2 so as to cover the display panel 3 and the elastic members 6 and 7. The circuit board 8 is provided with an opening 81 through which a wiring connecting the circuit board 8 and the display panel 3 is passed.

  That is, in the display device 1, the flexible flexible substrate 31 drawn from the side surface of the display panel 3 is drawn to the back side of the circuit board 8 through the opening 81 of the circuit board 8, and a predetermined portion of the circuit board 8 is drawn. The circuit board 8 and the display panel 3 are connected to each other.

  By the way, since the vehicle-mounted display device 1 is installed in a limited space in the vehicle, the size of the housing 2 is limited. Therefore, if the display panel 3 having a display area as large as possible is provided inside the housing 2, the display panel 3 is attached to the display panel 3 by the screw 51 in a narrow space between the installation location of the display panel 3 and the installation location of the operation buttons 4. It may be necessary to fix to the housing 2.

  For this reason, in the display device 1, as shown in FIG. 2, the screwed portion of the display panel 3 with the screw 51 and the handling portion of the flexible substrate 31 may overlap each other. In this case, if there is a burr on the head of the screw 51, the flexible substrate 31 is damaged due to interference between the flexible substrate 31 and the head of the screw 51 when the flexible substrate 31 is bent due to vibration caused by running of the vehicle. There is a risk of disconnection.

  Therefore, in the display device 1, the flexible substrate 31 and the head of the screw 51 are used by using the elastic member 6 for the operation button 4 provided in the vicinity of the screw 51 that fixes the display panel 3 at a position overlapping the flexible substrate 31. Interference with the part was prevented.

  Specifically, the elastic member 6 includes a tongue piece that is inserted between the head of the screw 51 and the flexible substrate 31 on the outer periphery. In the display device 1, the flexible substrate 31 is prevented from being damaged by interposing the tongue piece as a cushioning material between the head of the screw 51 and the flexible substrate 31.

  Next, the shape of the elastic member 6 will be described in detail with reference to FIG. FIG. 3 is a schematic cross-sectional view of the display device 1 taken along line AA shown in FIG. 3A is a schematic cross-sectional view of the housing 2 on which the display panel 3 and the like are mounted, and FIG. 3B is an enlarged view showing the inside of a broken line frame shown in FIG. .

  As shown in FIG. 3A, the display panel 3 is fixed to the panel holder 5. The panel holder 5 is fixed by screws 51 in a space between the mounting position of the display panel 3 and the mounting position of the operation button 4 inside the housing 2.

  A circuit board 8 is attached to the back surface of the display panel 3 via a panel holder 5. The circuit board 8 and the display panel 3 are connected by a flexible board 31 drawn from the side surface of the display panel 3 to the back side of the circuit board 8 via the opening 81 (see FIG. 2).

  Elastic members 6 and 7 are attached between the operation button 4 and the circuit board 8. The elastic members 6 and 7 are provided with rubber switches 61 and 71 (see FIG. 2) that are elastically deformed when the operation button 4 is pressed at a position corresponding to the operation button 4.

  Here, the rubber switches 61 and 71 will be briefly described with reference to FIG. Since the rubber switches 61 and 71 have the same shape, the rubber switch 61 will be described below.

  As shown in FIG. 3B, the rubber switch 61 is formed in a dome shape so as to be elastically deformed when the operation button 4 is pressed. Further, at the center of the inner peripheral surface formed in the dome shape of the rubber switch 61, for example, a protrusion formed by a conductive member such as carbon is formed.

  When the operation button 4 is pressed by the user, the rubber switch 61 has a dome-shaped portion that is depressed by the pressing force received from the operation button 4, and a switch portion 82 provided with a protrusion on the circuit board 8. Contact.

  Thereby, the rubber switch 61 electrically short-circuits between predetermined contacts provided in the switch unit 82 by the protrusions, and turns on the switch unit 82. When the pressing force is released, the rubber switch 61 returns to its original dome shape by the elastic force.

  Further, the elastic member 61 attached to the back surface of the operation button 4 provided on the side from which the flexible substrate 31 is drawn is formed so as to extend from the outer periphery toward the portion where the head of the screw 51 and the flexible substrate 31 overlap. The tongue piece 62 is provided.

  The tongue piece 62 is simultaneously formed of the same material as the rubber switch 61 by injection molding when the elastic member 6 is formed. That is, the tongue piece 62 has a predetermined elasticity like the rubber switch 61. In the display device 1, the tongue member 62 is inserted between the head of the screw 51 and the flexible substrate 31 by attaching the elastic member 6 to the back surface of the operation button 4.

  As described above, in the display device 1, the elastic member 6 is interposed between the flexible substrate 31 that connects the display panel 3 and the circuit board 8 and the head of the screw 51 that fixes the display panel 3 inside the housing 2. A tongue 62 formed on the outer periphery is inserted.

  Thereby, in the display device 1, since the tongue piece 62 serves as a cushioning material, it is possible to prevent the flexible substrate 31 and the head of the screw 51 from coming into contact when the flexible substrate 31 is bent. Become.

  Therefore, according to the display device 1, it is possible to prevent the flexible substrate 31 from being damaged due to the interference with the screw 51. Moreover, since the tongue piece 62 can be provided only by changing the shape of the existing elastic member 6, it is possible to prevent the flexible substrate 31 from being damaged while suppressing an increase in the cost of the display device 1.

  In addition, the tongue piece 62 is formed to have a thickness M that is thicker than the thickness N of the elastic member 6 that is elastically deformed, that is, the rubber switch 61 portion. Thereby, in the display device 1, when the elastic member 6 is attached or when the vehicle vibrates, the tongue piece 62 can be prevented from curling, so that the attaching operation of the elastic member 6 is facilitated. Interference with the head of the screw 51 can be reliably prevented.

  Further, the tongue piece 62 is formed on the outer periphery of the surface of the elastic member 6 that faces the surface that contacts the circuit board 8. Thereby, in the display device 1, the friction between the tongue piece 62 and the flexible substrate 31 can be reduced.

  Specifically, when the rubber switch 61 is elastically deformed when the operation button 4 is pressed, the surface of the elastic member 6 on the side in contact with the circuit board 8 expands in the circumferential direction of the rubber switch 61. At this time, if the tongue piece 62 is formed on the surface of the elastic member 6 on the side in contact with the circuit board 8, the tongue piece 62 is pushed by the rubber switch 61 and moves to the display panel 3 side in parallel with the circuit board 8. When the shape of the rubber switch 61 returns to the dome shape, it returns to the original position.

  That is, when the tongue piece 62 is formed on the surface of the elastic member 6 on the side in contact with the circuit board 8, the tongue piece 62 is repeatedly displaced in parallel with the circuit board 8 every time the operation button 4 is operated. Friction occurs with the flexible substrate 31.

  Therefore, in the display device 1, the tongue piece 62 is provided on the outer periphery of the surface of the elastic member 6 that faces the surface that contacts the circuit board 8. Thereby, in the display device 1, when the rubber switch 61 is elastically deformed, the stress that the rubber switch 61 tries to push the tongue piece 62 toward the display panel 3 is caused by the stress at the connecting portion between the rubber switch 61 and the tongue piece 62. Absorbed by elasticity.

  Thus, since the display device 1 can suppress the displacement of the tongue piece 62 due to the elastic deformation of the rubber switch 61, the tongue piece 62 and the flexible substrate can be used even when the operation button 4 is repeatedly operated. Friction with 31 can be reduced.

  Next, an example of an assembly method of the display device 1 will be described with reference to FIG. FIG. 4 is a diagram illustrating an assembly process of the display device 1 according to the embodiment. 4A, in the assembling method according to the embodiment, the peripheral edge of the display panel 3 is secured by screwing the panel holder 5 holding the display panel 3 with screws 51 from the back side of the housing 2. As shown in FIG. The part is fixed to the inside of the housing 2.

  Subsequently, as shown in FIG. 4B, the elastic members 6 and 7 are attached to the back surface of the operation button 4. At this time, the elastic member 6 is attached to the back surface of the operation button 4 so that the head of the screw 51 fixing the panel holder 5 at a position overlapping the flexible substrate 31 is covered with the tongue piece 62.

  Subsequently, as shown in FIG. 4C, the circuit board 8 is attached to the back side of the display panel 3 so as to face the panel holder 5 and the elastic members 6, 7, and the circuit board 8 is opened from the opening 81. The flexible board 31 is pulled out to the back side of the circuit board 8.

  Subsequently, as shown in FIG. 4 (d), the flexible substrate 31 pulled out from the display panel 3 is connected to a predetermined position on the circuit board 8 through the elastic member 6 through a position overlapping the head of the screw 51. To do.

  Thus, in the assembly method according to the embodiment, after attaching the elastic member 6 so that the head of the screw 51 that may interfere with the flexible substrate 31 is covered with the tongue piece 62, the circuit board 8 is attached, The flexible board 31 is pulled out from the opening 81 of the board 8 and connected to the circuit board 8.

  Thereby, in the assembling method according to the embodiment, when the flexible substrate 31 is moved, such as when the flexible substrate 31 is pulled out from the opening 81, the flexible substrate 31 is connected to the circuit substrate 8, and the like, Contact with the screw 51 can be prevented.

  In the assembling method according to the embodiment, the flexible substrate 31 is protected by an existing assembling process of attaching the rubber switch 61. Therefore, according to the assembling method according to the embodiment, the flexible substrate 31 in the display device 1 can be protected without increasing the number of assembling steps.

  The member interposed as a cushioning material between the flexible substrate 31 and the screw 51 may be a member other than the tongue piece 62 formed on the elastic member 6. For example, when an insulating sheet is provided between the circuit board 8 and the panel holder 5, the shape of the existing insulating sheet may be changed and interposed between the flexible substrate 31 and the screw 51 as a buffer material. .

  Hereinafter, the case where an existing insulating sheet is provided as a cushioning material between the flexible substrate 31 and the screw 51 will be described with reference to FIG. FIG. 5 is a schematic view showing a part of the display device 1a provided with an insulating sheet as a cushioning material.

  FIG. 5A is a schematic diagram showing a portion where the flexible board 31 and the screw 51 may interfere with each other, and shows a state where the flexible board 31 and the circuit board 8 are not connected.

  FIG. 5B is a cross-sectional view taken along line BB in FIG. 5A, and shows a state where the flexible substrate 31 and the circuit substrate 8 are connected. Further, in FIG. 5, the illustration of the circuit board 8 by the solid line is omitted from the viewpoint of facilitating the description, and the same reference numerals are given to the same components as those of the display device 1 illustrated in FIG. 3.

  As shown in FIGS. 5A and 5B, the display device 1 a is provided with an insulating sheet 9 between the panel holder 5 and the circuit board 8. The insulating sheet 9 is formed, for example, by punching out an insulating member such as PET (polyethylene).

  In addition, the insulating sheet 9 is formed with an L-shaped tongue piece 91 in a plan view at an outer peripheral portion corresponding to a portion where the flexible substrate 31 and the screw 51 may interfere with each other. The tongue piece 91 is formed at the same time when the insulating sheet 9 is punched into a predetermined shape.

  When assembling the display device 1 a, the panel holder 5 holding the display panel 3 is fixed to the housing 2, and then the elastic member 6 a on which the tongue piece 62 is not formed is attached to the back of the operation button 4.

  Subsequently, the insulating sheet 9 is attached to the back surface of the panel holder 5. At this time, the tongue piece 91 of the insulating sheet 9 is sandwiched between the head of the screw 51 and the flexible substrate 31. Thereafter, after the circuit board 8 is overlaid on the insulating sheet 9, the flexible board 31 is pulled out from the opening 81 (see FIG. 2) of the circuit board 8 and connected to a predetermined portion of the circuit board 8.

  As described above, in the display device 1 a, the tongue 91 formed on the insulating sheet 9 is interposed between the screw 51 and the flexible substrate 31, thereby preventing the flexible substrate 31 from being damaged due to contact with the screw 51. it can.

  Further, the tongue piece 91 of the insulating sheet 9 is formed without increasing the manufacturing cost and the number of manufacturing steps only by partially changing the shape of the mold for punching the PET sheet. Therefore, according to the display device 1a, it is possible to prevent damage to the flexible substrate 31 due to contact with the screw 51 while suppressing an increase in cost.

  As described above, the display device 1 includes the display panel 3 whose periphery is fixed to the inside of the housing 2 by the screws 51, and the predetermined position via the position where the display panel 1 is pulled out from the display panel 3 and overlaps the head of the screws 51. And a flexible board 31 connected to the circuit board 8.

  Further, the display device 1 includes an operation button 4 provided in the vicinity of the screw 51 and a tongue piece 62 inserted between the head of the screw 51 and the flexible substrate 31 on the outer periphery. And an elastic member 6 that is elastically deformed to electrically short-circuit between contacts provided on the circuit board 8 when the operation button 4 is operated.

  For this reason, in the display device 1, the tongue piece 62 of the elastic member 6 functions as a buffer material between the flexible substrate 31 and the screw 51 when the flexible substrate 31 is bent by vibration or the like. Moreover, the tongue piece 62 of the elastic member 6 is formed only by partially changing the shape of the existing elastic member. For this reason, according to the display device 1, it is possible to prevent damage to the flexible substrate 31 due to contact with the screws 51 while suppressing an increase in cost.

DESCRIPTION OF SYMBOLS 1 Display apparatus 2 Housing | casing 3 Display panel 31 Flexible board 4 Operation button 5 Panel holder 51 Screw 6, 7 Elastic member 61, 71 Rubber switch 8 Circuit board 81 Opening part

Claims (4)

A display panel fixed to the inside of the housing by a fixture;
A flexible board that is pulled out from the display panel and connected to the circuit board via a position overlapping the fixture;
An operation unit provided in the vicinity of the fixture;
Tongues are inserted the fixture and into between the flexible substrate is formed on the outer circumference, when the operating unit is attached to the back of the operation section is operated, Machinery circuit board before elastically deformed An elastic member that electrically short-circuits predetermined contacts provided on the display. The tongue piece is
The display device according to claim 1, wherein the display device is formed thicker than a portion of the elastic member that is elastically deformed. The tongue piece is
The display device according to claim 1, wherein the elastic member is formed on an outer periphery of a surface opposite to a surface in contact with the circuit board. Fixing the display panel to the inside of the housing with a fixture;
A tongue piece covering the fixture is formed on the outer periphery, and when an operation portion provided in the vicinity of the fixture is operated, a predetermined contact provided on the circuit board is electrically short-circuited by elastic deformation. Attaching the elastic member to be attached to the back surface of the operation unit;
Assembling method of a display device characterized by including a step of connecting the flexible substrate drawn out from the display panel by way of the position overlapping with the fixture through the tongue to the circuit board.

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