Information display device

Abstract

To achieve an information display that can be reduced in weight and in which main members are firmly fixed to each other.SOLUTION: An information display (1) comprises a pair of fixing parts (50) each having a belt-like part (51) and a pair of branch parts (52). Both ends of each belt-like part (51) are screwed to a front case (10) to fix a display panel (30), and the two pairs of branch parts (52) are screwed to fix a circuit board (40).SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an information display device.

Background Art

[0002] Conventionally, an information display device including a display panel, a fixing part (fixing bracket), and a circuit board in this order from the front case side inside a housing composed of a front case and a rear case has been known. Here, the fixing part is connected to the front case to sandwich and fix the display panel provided between the fixing part and the front case. In such an information display device, a configuration is known in which the display panel can be firmly fixed to the front case by screwing the fixing part to a boss provided on the front case (Patent Document 1).

[0003] In addition, a configuration is also known in which the circuit board can be firmly fixed to the fixing part by screwing the circuit board to the fixing part (Patent Document 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, since the fixing part used in the conventional information display device is a plate-shaped metal fitting that covers the display panel, there is a problem that the information display device becomes heavy.

[0006] One aspect of the present invention has been made in view of the above problems, and an object thereof is to realize an information display device that can be reduced in weight and in which each main member is firmly fixed to each other.

Means for Solving the Problem

[0007] In order to solve the above problems, an information display device according to an aspect of the present invention includes a front case, a rear case connected to the front case, a display panel provided inside a housing composed of the front case and the rear case, a pair of fixing parts, and a circuit board. The display panel is disposed behind the front case, the pair of fixing parts are disposed behind the display panel, and the circuit board is disposed behind the fixing parts. Each of the fixing parts has a linear strip portion and a pair of branch portions that branch from a long side of the strip portion in a direction intersecting the longitudinal direction of the strip portion, and the pair of branch portions are formed with end portions provided with a step between the strip portion. Both ends of each of the strip portions are screwed to the front case, so that the display panel is sandwiched and fixed between the pair of fixing parts and the front case, and the circuit board is fixed to the fixing parts by being screwed to each of the two pairs of branch portions.

[0008] According to the above configuration, the fixing part is a pair of strip-shaped metal fittings each having a linear strip portion and a pair of branch portions. Therefore, the fixing part can be made lighter compared to a plate-shaped metal fitting that covers the display panel used in a conventional information display device. Also, since the strip portions of the pair of fixing parts are each screwed to the front case, the display panel can be fixed between the front case and the fixing parts. Furthermore, the circuit board is directly screwed at four locations so as to be in contact with the branch portions of the fixing part fixed to the front case, so that the circuit board can be indirectly fixed to the front case. Therefore, it is possible to reduce the weight and realize an information display device in which each main member (front case, display panel, fixing part, circuit board) is fixed to each other.

[0009] Further, both ends of the strip-shaped portion may be screwed in the direction toward the front case. According to the above configuration, since the strip-shaped portions of the pair of fixing portions are screwed in the direction toward the front case, the display panel can be effectively pressed and firmly fixed. Further, the circuit board is directly screwed at four positions so as to be in contact with the branch portion of the fixing portion firmly fixed to the front case, so that the circuit board can be indirectly and firmly fixed to the front case. Therefore, it is possible to achieve weight reduction and realize an information display device in which each main member (front case, display panel, fixing portion, circuit board) is firmly fixed to each other.

[0010] Further, the front case may have at least two pairs of boss portions, and both ends of each of the strip-shaped portions may be screwed to a pair of the boss portions respectively. According to the above configuration, with an easy configuration of providing boss portions on the front case, the display panel can be firmly fixed between the fixing portion and the front case.

[0011] Further, the fixing portion may be configured by bending a plate-shaped member. According to the above configuration, a strip-shaped fixing portion having a pair of branch portions can be easily manufactured by performing bending processing or the like on the plate-shaped member.

Advantages of the Invention

[0012] According to one aspect of the present invention, it is possible to achieve weight reduction and realize an information display device in which each main member is firmly fixed to each other.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0014] Hereinafter, embodiments according to one aspect of the present invention (hereinafter also referred to as "the present embodiment") will be described with reference to the drawings. However, the present embodiment described below is merely an exemplification of the present invention in every aspect. Needless to say, various improvements and modifications can be made without departing from the scope of the present invention. That is, in carrying out the present invention, a specific configuration according to the embodiment may be appropriately adopted.

[0015] 〔Embodiment 1〕 §1 Application Example FIG. 1 is a front view of the information display device 1 according to the present embodiment. FIG. 2 is an exploded perspective view of the information display device 1. FIG. 3 is an enlarged perspective view of the fixing part 50 of the information display device 1. As shown in FIGS. 1 and 2, the information display device 1 includes a display panel 30, a pair of fixing parts 50, and a circuit board 40 in this order from the front case 10 side inside a housing composed of a front case 10 and a rear case 20. The front case 10 has at least two pairs of display panel fixing boss parts 13 (boss parts).

[0016] As shown in FIG. 3, each of the fixing parts 50 has a linear strip part 51 and a pair of branch parts 52 that branch from the long side 511 of the strip part 51 in a direction intersecting the longitudinal direction of the strip part 51. Each of the branch parts 52 has an end part provided with a step between it and the strip part 51.

[0017] Both ends of each strip-shaped portion 51 are screwed to a pair of display panel fixing bosses 13 respectively. Thereby, the display panel 30 is sandwiched and fixed between the pair of fixing portions 50 and the front case 10. Further, the circuit board 40 is screwed to each of the two pairs of branch portions 52. Thereby, the circuit board 40 is fixed to the pair of fixing portions 50.

[0018] According to this application example, weight reduction is possible, and an information display device in which each main member (front case 10, display panel 30, fixing portion 50, circuit board 40) is firmly fixed to each other can be realized.

[0019] §2 Configuration Example (Configuration of Information Display Device 1) The information display device 1 according to this embodiment is applied to an FA (Factory Automation) system, for example, as an HMI (Human Machine Interface) for checking the operations and setting contents of each device in the FA system and inputting various setting contents to each device. Hereinafter, as an example of such an HMI, an information display device 1 that displays a display image showing the operations and setting contents of each device on the display panel 30 and receives a touch operation from the user on the touch panel 60 will be described.

[0020] As shown in FIGS. 1 and 2, the information display device 1 includes a front case 10, a rear case 20, a display panel 30, a circuit board 40, a pair of fixing portions 50, a touch panel 60, and a front sheet 70. Hereinafter, in the information display device 1, the side where the front case 10 is located is defined as the front, the side where the rear case 20 is located is defined as the rear, the left side toward the rear is defined as the left, and the right side is defined as the right for explanation.

[0021] The front case 10 has a frame portion 11 formed to surround a rectangular opening and a rising portion 12 rising rearward from the outer edge of the frame portion 11. A recess for fitting a touch panel 60, which will be described later, is formed on the front surface of the frame portion 11. Further, on the back surface of the frame portion 11, two pairs of display panel fixing boss portions 13a to 13d protruding rearward are provided. Specifically, one pair of display panel fixing boss portions 13a and 13c are provided at the upper and lower portions of the frame portion 11, respectively, closer to the left end from the center. Also, one pair of display panel fixing boss portions 13b and 13d are provided at the upper and lower portions of the frame portion 11, respectively, closer to the right end from the center. A screw hole for inserting a screw 81 is formed in the display panel fixing boss portion 13 from the front toward the protruding direction end. In the present specification, when it is not necessary to particularly distinguish between the two pairs of display panel fixing boss portions 13a to 13d, they are simply referred to as display panel fixing boss portions 13. The same applies to other paired members.

[0022] The rear case 20 has a bottom portion 21, rising portions 22 rising forward from the outer edges of the upper and lower ends of the bottom portion 21, and end portions 23 extending upward and downward from the front ends of the respective rising portions 22. The front case 10 and the rear case 20 are members constituting the housing of the information display device 1. The front case 10 and the rear case 20 are connected, for example, by screwing a hole portion (not shown) provided in the end portion 23 and a boss portion (not shown) provided on the back surface of the frame portion 11 so that the end portion 23 abuts against the inner surface of the rising portion 12.

[0023] The display panel 30 is disposed behind the front case 10 inside the housing constituted by the front case 10 and the rear case 20. The display panel 30 is, for example, a liquid crystal display (LCD), an organic EL display panel (Electro luminescence), or the like.

[0024] A pair of fixing parts 50 are arranged behind the display panel 30 inside a housing composed of a front case 10 and a rear case 20. As shown in FIGS. 2 and 3, each of the pair of fixing parts 50 has a linear strip part 51 and a pair of branch parts 52 that branch from the long side 511 of the strip part 51 in a direction intersecting the longitudinal direction of the strip part 51. An end part provided with a step is formed between the pair of branch parts 52 and the strip part 51. For example, the branch part 52 has a first extension part 521, a second extension part 522 (step), and a third extension part 523 (end part) (see FIG. 3). The first extension part 521 extends substantially parallel to the main surface of the strip part 51 from the long side 511. The second extension part 522 extends rearward from the tip of the first extension part 521. The third extension part 523 extends substantially parallel to the main surface of the strip part 51 from the tip of the second extension part 522. In addition, strip part side hole parts 53 are provided at both ends of the strip part 51. In addition, branch part side hole parts 54 are provided in the pair of branch parts 52 (third extension part 523). The fixing part 50 may be configured by bending a plate-like member (for example, a sheet metal member).

[0025] Both ends of the strip part 51 are screwed to the display panel fixing boss part 13 by screws 81. Thereby, the display panel 30 is sandwiched and fixed between the pair of fixing parts 50 and the front case 10. A cushioning material for filling the gap between the display panel 30 and the front case 10 may be attached to the front surface of the display panel 30 and / or the back surface of the frame part 11. Thereby, the pressure on the display panel 30 from the pair of fixing parts 50 can be suppressed. In addition, rattling of the display panel 30 due to the gap can be reduced, and the display panel 30 can be firmly fixed.

[0026] In an example shown in FIG. 2, a pair of fixing parts 50 consists of a fixing part 50a arranged on the left side and a fixing part 50b arranged on the right side. At the upper and lower ends of the strip part 51a in the fixing part 50a, strip part side hole parts 53a and 53c screwed to the display panel fixing boss parts 13a and 13c are respectively provided. At the upper and lower ends of the strip part 51b in the fixing part 50b, strip part side hole parts 53b and 53d screwed to the display panel fixing boss parts 13b and 13d are respectively provided. The screws 81a to 81d are respectively fastened to the screw holes of the two pairs of display panel fixing boss parts 13a to 13d through the strip part side hole parts 53a to 53d.

[0027] The circuit board 40 is arranged behind a pair of fixing parts 50 to be described later inside a housing composed of a front case 10 and a rear case 20. The circuit board 40 is rectangular and has electronic components on its front surface. Four circuit board fixing hole parts 44a to 44d are respectively provided at the four corners of the circuit board 40. Specifically, the circuit board fixing hole parts 44a and 44b are respectively provided at the upper left and right ends of the circuit board 40. Also, the circuit board fixing hole parts 44c and 44d are respectively provided at the lower left and right ends of the circuit board 40.

[0028] The circuit board fixing hole parts 44 are screwed to the branch part 52 by screws 82. Thereby, the circuit board 40 is fixed to the fixing part 50. In an example shown in FIG. 2, the circuit board fixing hole parts 44a and 44c are respectively screwed to the branch part side hole parts 54a and 54c provided in a pair of branch parts 52a and 52c respectively branched from the upper and lower ends of the fixing part 50a. Also, the circuit board fixing hole parts 44b and 44d are respectively screwed to the branch part side hole parts 54b and 54d provided in a pair of branch parts 52b and 52d respectively branched from the upper and lower ends of the fixing part 50b. The screws 82a to 82d are respectively inserted into the circuit board fixing hole parts 44a to 44d and the branch part side hole parts 54a to 54d and fastened by a known method.

[0029] The touch panel 60 is fitted into a recess formed in the front surface of the frame portion 11. Further, the front sheet 70 is attached to the front surface of the frame portion 11 to protect the touch panel 60.

[0030] (Comparative Example) Hereinafter, the configuration of the information display device 101 according to the comparative example will be described with reference to FIGS. 6 and 7. FIG. 6 is a cross-sectional view of the information display device 101 according to the comparative example in a cross-section orthogonal to the left-right direction. FIG. 7 is an enlarged perspective view of the fixing portion 150 of the information display device 101 according to the comparative example. As shown in FIG. 6, the information display device 101 includes a display panel 130, a fixing portion 150, and a circuit board 140 in order from the front case 110 side inside a housing composed of a front case 110 and a rear case 120. A display panel fixing boss portion 113 provided on the front case 110 and a display panel fixing hole portion 153 provided on the fixing portion 150 are screwed together (see also FIG. 7). Thereby, the display panel 130 is sandwiched and fixed between the fixing portion 150 and the front case 110. Further, a circuit board fixing boss portion 116 provided on the front case 110 and a circuit board fixing hole portion 146 provided on the circuit board 140 are screwed together. Thereby, in the information display device 101 of the comparative example, the circuit board 140 can be directly and firmly fixed to the front case 110.

[0031] Here, the circuit board fixing boss portion 116 is provided to protrude toward the circuit board 140 on the outer peripheral side of the display panel 130. That is, the screwing portion between the front case 110 and the circuit board 140 (range A surrounded by the dotted line in FIG. 6) has to be located on the outer peripheral side of the display panel 130. Therefore, in order to cover the screwing portion, it is necessary to make the rear case 120 into a box shape without a slim feeling, and there is a problem that the appearance of the information display device 101 is impaired.

[0032] (Operation and Effect of the Information Display Device 1) FIG. 4 is a cross-sectional view taken along the arrow of cutting line A shown in FIG. 1 of the information display device 1. FIG. 5 is a rear view of the information display device 1. As shown in FIG. 4, the information display device 1 according to the present embodiment is provided with a branch portion 52 for fixing the circuit board 40 to a fixing portion 50 instead of the boss portion 116 for fixing the circuit board (see FIG. 6) according to the comparative example. That is, when the screw 82 is inserted into and fastened to the circuit board fixing hole portion 44 and the branch portion side hole portion 54, the circuit board 40 is fixed to the fixing portion 50.

[0033] Here, since it is not necessary to consider the position of the display panel 30 for the screwing portion between the fixing portion 50 and the circuit board 40, it is provided inside in the vertical direction of the housing from the screwing portion between the fixing portion 50 and the front case 10 (the position of the display panel fixing boss portion 13). Therefore, the vertical width at the bottom 21 of the rear case 20 that covers the circuit board 40 from the rear can be made smaller than the vertical width of the frame portion 11 of the front case 10 having the display panel fixing boss portion 13. This means that, compared with the box-shaped rear case 120 (see FIG. 6) according to the comparative example, the rear case 20 according to the present embodiment can be slimmed down at its upper and lower ends (only in the region B surrounded by the dotted lines shown in FIGS. 4 and 5). That is, by applying the function of fixing the circuit board 40 to the fixing portion 50, the housing of the information display device 1 can be miniaturized.

[0034] In addition, the fixing part 50 according to the present embodiment is a pair of strip-shaped metal fittings each having a linear strip-shaped part 51 and a pair of branching parts 52. Therefore, the fixing part 50 can be made lighter in weight compared to a plate-shaped metal fitting that covers a display panel used in a conventional information display device. Further, since the strip-shaped parts 51 of the pair of fixing parts 50 are each screwed to the display panel fixing boss parts 13 provided above and below the front case 10, the display panel 30 can be effectively pressed and firmly fixed. Furthermore, the circuit board 40 is directly screwed at four locations so as to be in contact with the third extension part 523 of the fixing part 50 firmly fixed to such a front case 10, so that the circuit board 40 can be firmly fixed indirectly to the front case 10. Therefore, it is possible to reduce the weight, and an information display device 1 in which each main member (front case 10, display panel 30, fixing part 50, circuit board 40) is firmly fixed to each other can be realized.

[0035] In addition, since a step is formed in the branching part 52, the third extension part 523 is located behind the strip-shaped part 51. Therefore, by screwing the fixing part 50 to the front case 10 and the circuit board 40, it is possible to easily secure a space between the display panel 30 and the circuit board 40 in consideration of the height of the electronic components mounted on the circuit board 40 and the influence of heat generation of the electronic components.

[0036] (Supplementary Notes) In the present embodiment, an example in which the fixing part 50 has four strip-shaped part side hole parts 53a to 53d and four branching part side hole parts 54a to 54d is shown, but the number of the strip-shaped part side hole parts 53 and the branching part side hole parts 54 is not limited to this. Further, corresponding to the number of the strip-shaped part side hole parts 53 and the branching part side hole parts 54, the number of the display panel fixing boss parts 13 and the circuit board fixing hole parts 44 can also be changed respectively.

[0037] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention.

Description of Signs

[0038] 1 Information display device 10 Front case 13 Boss part for fixing display panel (boss part) 20 Rear case 30 Display panel 40 Circuit board 50 Fixing part 51 Band-like part 52 Branch part

Claims

1. A front case, a rear case connected to the front case, a display panel, a pair of fixing parts, and a circuit board provided inside a housing composed of the front case and the rear case, wherein the display panel is disposed behind the front case, the pair of fixing parts are disposed behind the display panel, and the circuit board is disposed behind the fixing parts, each of the fixing parts has, a linear strip portion, and a pair of branch portions that branch from the long side of the strip portion in a direction intersecting the longitudinal direction of the strip portion, and an end portion provided with a step extending rearward with respect to the strip portion is formed between the strip portion and the pair of branch portions, the end portions are formed inside the longitudinal direction from both end portions of the strip portion, both end portions of each of the strip portions are screwed to the front case, whereby the display panel is sandwiched and fixed between the pair of fixing parts and the front case, and the circuit board is fixed to the pair of fixing parts by being screwed to the end portions of each of the two pairs of branch portions. An information display device.

2. The information display device according to claim 1, wherein both end portions of the strip portion are screwed in a direction toward the front case.

3. The front case has at least two pairs of boss portions, and the information display device according to claim 2, wherein both end portions of each of the strip portions are screwed to a pair of the boss portions, respectively.

4. The information display device according to any one of claims 1 to 3, wherein the fixing part is formed by bending a plate-like member.

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