JP5673456B2 - Liquid crystal display for factory equipment - Google Patents

Description

  The present invention relates to a liquid crystal display device for factory equipment provided with a liquid crystal display panel.

  The liquid crystal display device includes a liquid crystal display panel in a case. In order to indicate the size of the liquid crystal display device, there are, for example, nominal types such as a 4 inch type, a 7 inch type, and a 10 inch type. The size may vary slightly from manufacturer to manufacturer. For example, taking a 4-inch liquid crystal display device as an example, the liquid crystal display panel used in the liquid crystal display device may be 3.8 inches, 4.0 inches, or 4.3 inches. To do. In this case, in the liquid crystal display device, the size of the case itself is not changed (the case is made common), and the liquid crystal display panels having different sizes can be selectively attached (Patent Document 1).

JP 2001-83486 A

  In the above-mentioned Patent Document 1, a plurality of types of fixtures having different sizes are prepared for each liquid crystal display panel having a different size, and a liquid crystal display panel having a size to be used is selected from the plurality of types of fixtures. By selecting a fixture and screwing the selected fixture to the case and screwing it to the liquid crystal display panel, any size liquid crystal display panel can be attached to the case.

  However, this requires a plurality of types of fixtures, has troublesome parts management, has a large number of screwing steps, and is complicated and takes time. Furthermore, liquid crystal display devices used in facilities used in factories (for example, robots, programmable controllers, various detection devices, etc.) are often used in a vibration environment. The display panel may move.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a liquid crystal display device for factory equipment that does not require a plurality of types of fixtures, is easy and simple to assemble, and can reduce problems caused by vibration. There is to do.

  The present invention has been devised by conducting the following trial manufacture and investigations associated therewith. That is, FIGS. 16 to 18 which are reference drawings show a prototype (in this case, a 4-inch liquid crystal display device S) devised by the present inventor. The case 1 of the liquid crystal display device S is composed of a case body 2 and a panel frame 3. A substrate 4 is disposed in the case main body 2, and a liquid crystal display panel 5A or 5B is disposed thereon. In this case, the liquid crystal display panel 5A is, for example, a 4.3 inch size liquid crystal display panel, and the other liquid crystal display panel 5B is, for example, a 3.8 inch size liquid crystal display panel. In addition to the 4.3 inch size and the 3.8 inch size, the liquid crystal display panel includes a 4.0 inch size and the like. Here, the former two cases will be described as an example.

  The case body 2 has a rectangular shape, and as shown in FIG. 19, engagement members 7 are provided at portions corresponding to the centers of the side wall portions 2 b in the bottom wall portion 2 a. The engaging member 7 is made of synthetic resin, and a bent portion 7a that can be elastically deformed is formed in the lower portion. An arm portion 7b extends above the bent portion 7a, and a claw is formed on the upper portion of the arm portion 7b. A portion 7c is formed. The upper end portion 7d of the engaging member 7 is inclined.

  Each engaging member 7 is attached to the case main body 2 in such a posture that the claw portions 7c face the inner central portion of the case main body 2, and the initial positions of the claw portions 7c (the liquid crystal display panels 5A and 5B are arranged). As shown in FIG. 19, a part of the upper end 7d is in a region where the liquid crystal display panels 5A and 5B are arranged (see two-dot chain lines Ea and Eb, respectively). Is in a position to enter.

As shown in FIG. 20, each of the liquid crystal display panels 5A and 5B has a rectangular shape, and a mounting recess (which uses an existing screw hole) 6 is formed in advance in the center of each side end. Yes.
Here, for example, when the liquid crystal display panel 5A is arranged in the case main body 2, the respective engaging members 7 are pushed in the direction of the bottom wall 2a of the case main body 2 from the state of FIG. As described above, the lower end portion of the side end portion of the liquid crystal display panel 5A comes into contact with the upper end portion 7d of the claw portion 7c of each engagement member 7, and the claw portion 7c is pushed in the direction of the side wall portion 2b. 7 is elastically deformed in that direction (see FIG. 24), and when the liquid crystal display panel 5A is further inserted, when the mounting recess 6 encounters the claw portion 7c, the engaging member 7 is initialized by the elastic restoring force. By the elastic displacement in the position direction, the claw portion 7c engages with the mounting recess 6 (see FIGS. 16 and 21).

  In this case, the liquid crystal display panel 5A is pressed from four directions by elastic engagement force in the direction of the center of the case main body 2 of each engagement member 7 (the directions of arrows Q1 to Q4 in FIGS. 16 and 17). Is fixed in the case body 2. In the case where the liquid crystal display panel is a 3.8 inch size liquid crystal display panel 5B, as shown by reference numeral 7 'in FIG. 2 is fixed in place. Thereafter, the panel frame 3 is mounted on the case body 2 (see FIGS. 16 and 21).

  According to this configuration, liquid crystal display panels 5A and 5B having different sizes can be selectively arranged and fixed, and a plurality of types of attachments are not required, and attachment work such as a large number of screws is not required. It is only necessary to insert the panel 5A or 5B into the case main body 2, and the assembly is easy and simple.

  When configured as described above, it is possible to obtain the effect that a plurality of types of fixtures are not required and a large number of screws are not required, but there are the following concerns when used in a vibration environment such as a factory. . That is, as shown in FIGS. 16 and 21, in the above configuration in which the liquid crystal display panel 5A or 5B is attached by the elastic force of the engaging member 7, when the liquid crystal display device S is used in a factory where vibration occurs, Since the liquid crystal display panel 5A or 5B is elastically supported, there is a concern that the liquid crystal display panel 5A or 5B may move in a two-dimensional direction (X direction and Y direction in FIG. 7) along the panel surface. In addition, when the elastic engagement force by the engagement member 7 is increased (when the spring constant of the bending portion 7a is increased), it can be expected that the movement due to vibration can be suppressed to some extent, but in this case, by increasing the elastic force, An extremely large amount of labor is required for inserting and assembling the liquid crystal display panel 5A or 5B against the elastic force, and it is not possible to increase the elastic engagement force.

Therefore, in the present invention, the above-described engagement member is used, the problem of the movement of the liquid crystal display panel due to the vibration described above is solved, and the labor required for assembling the liquid crystal display panel can be reduced.
That is, according to the first aspect of the present invention, the engagement member provided in the standing state is provided in the vicinity of each side wall portion in the bottom wall portion of the case main body. Each engaging member is configured to rise from the bottom wall portion of the case main body, and is in the vicinity of each engaging member from an initial position where the lower portion is elastically deformable and is in a free state centering on the elastically deformable portion. It is possible to tilt in the direction of the side wall portion and to return elastically from the position after tilting to the initial position. The upper end portion of each engagement member is formed in an inclined shape that is inclined downward from the side wall portion side in the vicinity of each engagement member toward the inner central portion of the case main body, and the inner central portion of the case main body at the upper end portion The side end portion has a claw portion that protrudes toward the inner central portion of the case body and can be engaged with the mounting recess. And the to-be-fixed part which has several to-be-latched recessed parts in the site | part used as the side wall part side in the vicinity of each said engagement member in each said engagement member along the virtual circular arc line centering on the said elastically deformable part. In the inner side of the panel frame, when the panel frame is attached to the case body, one of the locked recesses of the fixed portion is locked, and the direction of the side wall near each engaging member A locking portion for preventing the tilting toward is formed.

  When the liquid crystal display panel is inserted into the case main body through the upper surface opening of the case main body, the side end portions of the liquid crystal display panel are in contact with the inclined upper end portions of the engaging members. By making contact, each engaging member is elastically tilted toward the side wall portion in the vicinity of the elastically deformable portion, and each engaging member is elastically restored when the mounting recess encounters the claw portion. The claw portion tip portion engages with the mounting recess. At this time, since the elastic restoring force of the engaging member acts on the claw portion, the claw portion is pressed and engaged with the mounting recess of the liquid crystal display panel without rattling. When liquid crystal display panels of different sizes are inserted and arranged, the liquid crystal display panels of different sizes can be similarly arranged and fixed in the case body, although the degree of elastic deformation of each engaging member is different.

  Thereafter, when the panel frame is attached to the upper part of the case body, the locking portion of the panel frame locks any locked recess of the fixed portion, and the peripheral wall of each engaging member Prevent displacement (tilt) in the direction of the part. That is, since the liquid crystal display panel is stopped in the direction of each side wall of the case body, the liquid crystal display panel is reliably stopped from moving in the two-dimensional direction (X, Y direction) when seen in a plan view. Therefore, it is possible to suppress the liquid crystal display panel from moving even under a vibration environment. In addition, since the nail | claw part of each engagement member is engaging with each attachment recessed part of a liquid crystal display panel without rattling, it is reliably stopped in the direction (Z direction) orthogonal to the said two-dimensional direction.

  In this way, liquid crystal display panels having different sizes can be attached by elastic deformation of the respective engaging members, and the respective engaging members can be fixed by the locking portions. As a result, when the liquid crystal display panels having different sizes are selectively attached, a plurality of types of attachments are not required, the assembly is easy and simple, and the problem of movement due to vibration of the liquid crystal display panel can be reduced.

  In addition, since the engaging member is securely locked (fixed) by the locking portion, that is, since the fixing of the liquid crystal display panel is ensured by the locking portion, the elastic engaging force of the engaging member is Is sufficient to allow the engagement member itself to engage with the liquid crystal display panel. As a result, unlike the case where the liquid crystal display panel is firmly held only by the elastic engagement force of the engagement member, it is not necessary to increase the elastic force so much, and therefore, no great effort is required for inserting the liquid crystal display panel. .

According to a second aspect of the present invention, the fixed portion is formed in a zigzag shape having continuous V-shaped locked recesses, slits are formed in the valleys of the locked recesses, and the locking is performed. The part bites into this slit. According to this, the engaging part of the panel frame bites into the slit of the locked recessed part, so that the engaging member is firmly fixed by the engaging part and thus the panel frame, further preventing the liquid crystal display panel from moving. it can.
According to a third aspect of the present invention, the locked concave portion of the fixed portion is formed from a conical or pyramidal hole, and the tip of the locking portion is conical or pyramidal. According to this, the engagement member can be stopped in directions other than the side wall portion direction, and the movement stop of the liquid crystal display panel can be further ensured.

1 is a vertical side view of a liquid crystal display device for factory equipment according to a first embodiment of the present invention. Plan view of liquid crystal display for factory equipment Vertical side view with the case body, LCD panel, and panel frame separated Top view of the case body (A) is a plan view of a 4.3 inch size liquid crystal display panel, and (B) is a plan view of a 3.8 inch size liquid crystal display panel. Longitudinal side view of engagement member portion in free state Longitudinal side view of the engaging member portion in the assembled state (A) is a perspective view of a fixed part, (b) is a perspective view of a locking part. Longitudinal side view showing the state during assembly (part 1) Enlarged longitudinal side view of the engaging member portion in FIG. Longitudinal side view showing the state during assembly (part 2) Longitudinal side view showing the state during assembly (Part 3) Longitudinal side view showing the assembled state of 3.8 inch LCD panel Vertical side view of the engaging member portion showing the second embodiment FIG. 8 equivalent view showing the third embodiment 1 equivalent diagram showing a reference example 2 equivalent diagram 3 equivalent figure 4 equivalent diagram Figure equivalent to FIG. 7 equivalent diagram Fig. 9 equivalent Fig. 10 equivalent 11 equivalent figure

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. First, in FIG. 1 and FIG. 2, a liquid crystal display device 11 for factory equipment (hereinafter simply referred to as a liquid crystal display device 11) of this embodiment is used as a display device for various equipment in a factory (for example, a robot, a programmable controller, various detection devices, etc.). Used. In the liquid crystal display device 11, as shown in FIGS. 1 to 4, a substrate 13 and a liquid crystal display panel 14 are arranged in a case 12. As the liquid crystal display panel 14, either a 4.3 inch size liquid crystal display panel 14A or a 3.8 inch size liquid crystal display panel 14B is disposed. The liquid crystal display panel 14 includes a 4.0 inch size in addition to the 4.3 inch size and the 3.8 inch size. In this embodiment, the former two cases will be described as an example. The liquid crystal display panel 14 is a general term for the liquid crystal display panels 14A and 14B.

  The 4.3 inch size liquid crystal display panel 14A and the 3.8 inch size liquid crystal display panel 14B have a rectangular planar shape as shown in FIGS. 5 (a) and 6 (b). Further, horizontal concave mounting recesses 15a, 15b, 15c, and 15d are provided at intermediate portions of the side end portions 14Aa, 14Ab, 14Ac, and 14Ad of the 4.3 inch size liquid crystal display panel 14A. Further, mounting holes 16a, 16b, 16c, and 16d each having a horizontal hole are also provided in the middle portion of each side end portion 14Ba, 14Bb, 14Bc, and 14Bd of the 3.8 inch size liquid crystal display panel 14B. Each of the mounting recesses 15a to 15d and 16a to 16d uses a screw hole provided in advance in each of the 4.3 inch size liquid crystal display panel 14A and the 3.8 inch size liquid crystal display panel 14B. Although there are a plurality of screw holes in each of the side end portions 14Aa to 14Ad, other screw holes are not shown.

  The case 12 includes a case main body 17 and a panel frame 18 made of synthetic resin. As shown in FIGS. 3 and 4, the case main body 17 has a rectangular bottom wall portion 17 a and side wall portions 17 b 1 to 17 b 4 that rise in a substantially perpendicular direction from the edge of the bottom wall portion 17 a. The upper surface opens.

  In the bottom wall portion 17a of the case body 17, engaging members 19A to 19D are provided upright in the vicinity of the intermediate portions of the side wall portions 17b1 to 17b4. In this case, the engagement members 19A to 19D have their base end portions (lower end portions) fitted into, for example, an arrangement recess 17d formed in the bottom wall portion 17a.

  The engaging members 19A to 19D are different in arrangement direction but have the same configuration, and therefore the engaging member 19A will be described as a representative. As shown in FIG. 6, the engaging member 19A has a portion 19a near the bottom wall portion 17a of the case body 17 that is slightly narrowed. The portion 19a can be elastically deformed and the elastically deformable portion 19a. Is the initial position Pa that is in a free state (the virtual center point is indicated by the symbol Cp) (this position is indicated by the position of the tip of the claw portion 22 described later as shown in FIGS. 3, 4, and 6). Therefore, it is possible to tilt in the direction of the side wall 17b1 (in the direction of arrow Ga in FIG. 6) in the vicinity of the engaging member 19A itself, and to return elastically from the position after tilting to the initial position Pa. is there.

  The upper end portion 19b of each engagement member 19A is formed in an inclined shape that inclines downward from the side wall portion 17b1 side in the vicinity toward the inner central portion of the case body 17. A claw portion 20 is formed at the upper end portion 19b at the end of the case body 17 on the inner center portion side so as to protrude in the direction of the inner center portion.

  An end of the upper end portion 19b on the inner side of the case main body 17 has a size of 4.3 inches that is expected to be disposed in the case main body 17 at the initial position Pa of the engagement member 19A in plan view. The liquid crystal display panel 14A and the 3.8-inch size liquid crystal display panel 14B are in positions where they have entered the virtual placement regions Ea and Eb (see FIG. 4), except that the end of the upper end 19b on the side wall 17b1 side is The virtual arrangement areas Ea and Eb are prevented from entering. That is, the upper end portion 19b of the engaging member 19A at the initial position Pa is the end of the virtual placement regions Ea and Eb (the side end portion 14Aa of each liquid crystal display panel 14A and the side end portion of the liquid crystal display panel 14B) when viewed in plan. 14Ba)).

  In each engaging member 19A, a plurality of recessed portions 21a (on the side of the side wall 17b1 of the case main body 17 along a virtual arc line r centered on a virtual center point Cp of the elastically deformable portion 19a). A fixed portion 21 having a shape shown in FIG. 8A is also formed. The locked recess 21a has a V shape, and the fixed portion 21 has a zigzag shape in which the locked recess 21a is continuous when viewed from the side. The formation pitch interval of the recessed portions 21a to be locked is set to be relatively small, and the claw portion 20 of the engaging member 19A locks the mounting recessed portion 15a of the 4.3 inch size liquid crystal display panel 14A (see FIG. 7), and a state where the mounting recess 16a of the 3.8-inch liquid crystal display panel 14B is locked (state indicated by symbol SB in FIG. 7). The stopper recess 21a is adapted to engage with a locking portion 22 described later.

  As shown in FIGS. 3 and 4, the engaging member 19 </ b> C has a bilaterally symmetric shape with the center portion of the case body 17 as the center and is attached in a bilaterally symmetric arrangement form with respect to the above-described engaging member 19 </ b> A. . Further, as shown in FIG. 4, the engaging member 19B in the vicinity of the side wall portion 17b2 and the engaging member 19D in the vicinity of the side wall portion 17b4 are similarly symmetrical with respect to the center portion of the case body 17 and are arranged in a symmetric manner. Attached to form.

  On the other hand, the panel frame 18 is made of synthetic resin, and as shown in FIGS. 3 and 7, a rectangular frame body 18a, a frame wall portion 18b hanging from the frame body 18a, and the frame body 18a. And a projecting plate portion 18c projecting inward from the frame body 18a. A central portion of the projecting plate portion 18c is opened in a rectangular shape, and the opening 18d is formed in a rectangular shape so as to be smaller than the liquid crystal display panels 14A and 14B. That is, as can be seen from FIG. 2, the side edges of the liquid crystal display panels 14A and 14B are hidden.

  The panel frame 18 is attached to the upper portion of the case main body 17 by an engaging means (not shown). In this case, the lower end portion of the frame wall portion 18b abuts on the upper end portions of the side wall portions 17b1 to 17b4 of the case main body 17. . In this case, the lower end portion of the frame wall portion 18b and the upper end portions of the side wall portions 17b1 to 17b4 of the case main body 17 have a stepped shape and are in contact with each other.

  As shown in FIGS. 3 and 7, the inside of the panel frame 18, the positions corresponding to the engaging members 19 </ b> A to 19 </ b> D of the case body 17 are slightly inward and downward (centripetal direction with respect to the center point Cp). A locking portion 22 that protrudes in an inclined state is formed (also shown in FIG. 8A). The distal end portion of the locking portion 22 has a V shape. The locking portion 22 is set to such a length that the front end portion can be fitted into the locked recesses 21a of the engaging members 19A to 19D. Accordingly, when the panel frame 18 is attached to the case body 17, the panel frame 18 is engaged with any of the locked recesses 21 a of the fixed portion 21.

  Now, a procedure for incorporating, for example, the 4.3 inch size liquid crystal display panel 14A into the case 12 out of the 4.3 inch size liquid crystal display panel 14A and the 3.8 inch size liquid crystal display panel 14B will be described.

  3 and 4, the engaging members 19A to 19D are in the initial positions Pa to Pd which are in a free state, respectively. From this state, as shown in FIG. 9, the 4.3-inch size liquid crystal display panel 14 </ b> A is pushed into the case body 17 with the display surface facing up and parallel to the upper surface of the case body 17. Then, as shown in FIG. 10, the lower end portions of the side end portions 14Aa, 14Ab, 14Ac, 14Ad of the liquid crystal display panel 14A (only the lower end portion of the side end portion 14Aa is shown in FIG. 10) are engaging members 19A-19D. When the liquid crystal display panel 14A is inserted as it is, the upper end portion 19b is pushed outward (in the direction of the side wall portions 17b1 to 17b4 of the case main body 17) and is engaged accordingly. The members 19A to 19D tilt (elastically deform) around the center point Cp in the direction of the side walls 17b1 to 17b4 of the case body 17 (see FIG. 11). Due to this tilting, the elastic restoring force is stored in the engaging members 19A to 19D themselves. FIG. 11 shows a state in which the liquid crystal display panel 14A has elastically deformed the engaging members 19A to 19D. In this case, the side end portion 14Aa of the liquid crystal display panel 14A is in sliding contact with the tip of the claw portion 20.

  Then, when the liquid crystal display panel 14A is further inserted and the mounting recesses 15a to 15d encounter the tip of the claw portion 20, elastic return of the engaging members 19A to 19D is allowed, and the initial positions Pa to Pd respectively. Thus, the tip of the claw 20 enters and engages with the mounting recesses 15a to 15d (see FIG. 12).

  Thereafter, the panel frame 18 is attached to the upper portion of the case body 17. At this time, the engaging members 19A to 19D are displaced to the position SA in FIG. 12 with the center point Cp as the center, but any of the locked recesses 21a of the fixed portion 21 is centered on the center point Cp. On the virtual arc line r, the locking portion 22 of the panel frame 18 is locked with any of the locked recesses 21a (see the solid line in FIG. 7).

By the locking by the locking portion 22, the engaging members 19A to 19D are prevented from tilting in the direction of the side wall portions 17b1 to 17b4 in the vicinity thereof.
When the 3.8-inch liquid crystal display panel 14B is arranged, the final arrangement form is as shown in FIG. In this case, the locked recess 21 a close to the side wall portions 17 b 1 to 17 b 4 in the locked recess 21 a is locked by the locking portion 22.

  As described above, in the embodiment, the engaging members 19A to 19D are erected on the bottom wall portion 17a of the case body 17, and the lower portions of the engaging members 19A to 19D are elastically deformable. The substantially entire members 19A to 19D can be tilted from the initial positions Pa to Pd in a free state about the elastically deformable portion 19a toward the side wall portions 17b1 to 17b4 in the vicinity, and the initial position from the position after the tilting. It is configured to be able to elastically return to the positions Pa to Pd.

  At the initial positions Pa to Pd of the engaging members 19A to 19D, a part of the upper end portion 19b of each engaging member 19A to 19D is a 4.3 inch size liquid crystal display panel 14A and a 3.8 inch size liquid crystal display panel 14A. The liquid crystal display panel 14B is configured to enter the virtual arrangement regions Ea and Eb, and the upper end portion 19b is inclined so as to be inclined downward from the side wall portions 17b1 to 17b4 in the vicinity toward the inner central portion of the case body 17. A claw portion 20 is formed at an end of the upper end portion 19b on the inner center portion side of the case main body 17 so as to protrude toward the inner center portion.

  Furthermore, in this embodiment, in each engagement member 19A to 19D, a plurality of locked portions are provided on the side wall portions 17b1 to 17b4 side in the vicinity along the virtual arc line r centering on the elastically deformable portion 19a. A fixed portion 21 having a concave portion 21 a is formed, and a locked concave portion 21 a of any of the fixed portions 21 is attached to the inside of the panel frame 18 when the panel frame 18 is attached to the case body 17. Locking portions 22 that lock and prevent tilting in the direction of the side wall portions 14b1 to 14b4 in the vicinity of the engagement members 19A to 19D are formed.

  According to this configuration, when the liquid crystal display panel 14 </ b> A (or 14 </ b> B) is inserted into the case body 17, each side end of the liquid crystal display panel 14 has the inclined shape of the engagement members 19 </ b> A to 19 </ b> D. By abutting the upper end portion 19b, the engaging members 19A to 19D are tilted elastically in the direction of the side wall portions 17b1 to 17b4 in the vicinity of the elastic deformable portion 19a, and the liquid crystal display panel 14A (or 14B) is tilted. When the mounting recesses 15a to 15d (or 16a to 16d) encounter the tip of the claw part 20, the claw part 20 moves in the elastic return direction, and the tip of the claw part 20 becomes the mounting recess 15a to 15d (or 16a). ~ 16d). At this time, since the elastic restoring force of the engaging members 19A to 19D acts on the claw portion 20 as the elastic engaging force, the claw portion 20 is attached to the mounting recesses 15a to 15d (or 16a to 16d) of the liquid crystal display panel 14A (or 14B). ) Engage with pressure contact without rattling. As described above, the liquid crystal display panels 14A and 14B having different sizes can be selectively attached by the elastic deformation of the engaging members 19A to 19D. In addition, in this embodiment, since many to-be-latched recessed parts 21a are provided, it is also possible to attach a 4.0 inch size liquid crystal display panel.

  Thereafter, when the panel frame 18 is attached to the upper portion of the case main body 17, the locking portion 22 of the case main body 17 locks any locked recess 21 a of the fixed portion 21. Accordingly, the engagement members 19A to 19D are prevented from being displaced (tilted) in the direction of the side wall portions 17b1 to 17b4 in the vicinity thereof. That is, the engagement member 19A is stopped in the direction of the arrow Xa in FIG. 2, the engagement member 19C is stopped in the direction of the arrow Xb (the direction opposite to the direction of the arrow Xa), and the engagement member 19B is stopped in the direction of the arrow Ya. The engagement member 19D is stopped in the direction of the arrow Yb (the direction opposite to the direction of the arrow Ya).

  Accordingly, the liquid crystal display panel 14A (or 14B) is stopped in the two-dimensional direction. Therefore, it is possible to suppress the liquid crystal display panel 14 from moving even under a vibration environment. In addition, since the nail | claw part 20 of each engagement member 19A-19D is engaging with each attachment recessed part 15a-15d (or 16a-16d) of liquid crystal display panel 14A (or 14B) without rattling, the said two-dimensional The movement is also reliably stopped in a direction (Z direction) orthogonal to the direction.

  As described above, according to this embodiment, the liquid crystal display panels 14 having different sizes can be selectively attached and the engaging members 19A to 19D can be locked by elastic deformation of the engaging members 19A to 19D. Since the liquid crystal display panels of different sizes can be selectively attached, a plurality of types of attachments are not necessary, assembly is easy and simple, and problems due to vibration can be reduced.

  In addition, since the engaging members 19A to 19D are reliably locked (fixed) by the locking portion 22, that is, the fixing of the liquid crystal display panel 14 is ensured by the locking portion 22, so this engagement The elastic engagement force of the members 19A to 19D may be such that the engagement members 19A to 19D themselves can be engaged with the liquid crystal display panel 14. As a result, unlike the case where the liquid crystal display panel is firmly held only by the elastic engagement force of the engagement member (in the case of FIG. 16), it is not necessary to increase the elastic force so much. Does not require a lot of effort.

  Next, FIG. 14 shows a second embodiment. In this second embodiment, a slit 31 is formed in a valley portion of each locked recess 21a, and the length of the locking portion 22 is set as follows. The first embodiment is different from the first embodiment in that the locking portion 22 is slightly elongated so as to bite into the slit 31. According to this, the engaging portion 22 of the panel frame 18 bites into the slit 31 of the locked recess 21a, whereby the engaging members 19A to 19D are firmly fixed by the engaging portion 22 and thus the panel frame 18, and the liquid crystal The movement stop of the display panel 14 can be further ensured.

  FIG. 15 shows a third embodiment, which is different from the first embodiment in the configuration of the fixed portion and the locking portion. The locked recess 32a of the fixed portion 32 of the third embodiment is a conical hole, and the locking portion 33 has a conical tip. According to this, each engagement member 19A-19D can be stopped in directions other than the side wall part 17b1-17b4 direction of this vicinity, and the movement stop of a liquid crystal display panel can be further ensured. In this case, a pyramid shape may be used instead of a conical shape.

In the embodiment described above, for the sake of convenience of explanation, the number of locked recesses 21a is about four, but a large number of locked recesses 21a may be provided at fine pitch intervals.
The present invention is not limited to the above-described embodiments, and can be applied by appropriately changing to various embodiments without departing from the gist thereof.

  In the drawings, 11 is a liquid crystal display device for factory equipment, 12 is a case, 14A and 14B are liquid crystal display panels, 15a to 15d and 16a to 16d are mounting recesses, 17 is a case body, 18 is a panel frame, and 19A to 19D are related. The joint member, 19a is an elastically deformable portion, 19b is an upper end portion, 20 is a claw portion, 21 is a fixed portion, 21a is a recessed portion to be locked, 22 is a locking portion, and 31 is a slit.

Claims (3)

A liquid crystal display device for factory equipment capable of selectively attaching to a case a plurality of liquid crystal display panels each having a rectangular shape and having side hole-like mounting recesses on each side end and having different sizes,
The case has a rectangular bottom wall portion and a side wall portion that rises in a substantially right angle direction from each edge portion of the bottom wall portion, the case main body having an open top surface, and attached to the upper portion of the case main body. A panel frame having a rectangular shape,
In the vicinity of each side wall portion in the bottom wall portion of the case body, each has an engaging member provided in a standing state,
Each engaging member has a form that rises from the bottom wall portion of the case body, and its lower portion is elastically deformable, and is in a free state with the elastically deformable portion as a center. And can be elastically returned from the position after the tilt to the initial position.
The upper end portion of each engagement member is formed in an inclined shape that is inclined downward from the side wall portion side in the vicinity of each engagement member toward the inner central portion of the case main body, and the inner central portion of the case main body at the upper end portion At the end on the side, it has a claw portion that protrudes toward the inner central portion and can be engaged with the mounting recess,
A fixed portion having a plurality of locked recesses is formed along a virtual arc line centering on the elastically deformable portion at a portion on the side wall portion side in the vicinity of each engagement member in each engagement member. ,
On the inner side of the panel frame, as the panel frame is attached to the case main body, any of the locked recesses of the fixed portion is locked to move toward the side wall portion of the engagement member. A locking part that prevents tilting is formed,
When the liquid crystal display panel is inserted into the case body through the upper surface opening of the case body, each side end portion of the liquid crystal display panel abuts on the inclined upper end portion of each engagement member. Each of the engaging members is elastically tilted toward the side wall portions in the vicinity of the respective elastically deformable portions, and each engaging member moves in the elastic return direction when the mounting recess encounters the claw portion. The claw portion tip is engaged with the mounting recess, and then the locking portion of the panel frame is one of the fixed portions when the panel frame is attached to the upper surface opening of the case body. A liquid crystal display device for factory equipment, characterized in that the recessed portion to be locked is locked.   The to-be-fixed portion has a zigzag shape continuously having a V-shaped locked recess, and a slit is formed in the valley of each locked recess, and the locking portion bites into this slit. 2. A liquid crystal display device for factory equipment according to claim 1.   2. The factory equipment according to claim 1, wherein the locked recess of the fixed portion is a conical or pyramidal hole, and the locking portion has a conical or pyramidal tip. Liquid crystal display device.

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