Display device

Abstract

To provide a display device capable of easily inserting and removing an external connector for connection to an outside with a compact configuration.SOLUTION: A display device comprises: a display unit; a control unit for controlling the display unit; and a connection part for connecting the display unit and the control unit. The connection part detachably connects a rear surface side of the display unit and the control unit, and an external connector for connection to the outside thereof is connectable to the control unit. In a state in which the control unit is fixed to the rear surface side of the display unit, an insertion / removal direction of the external connector is a direction in which the rear surface of the display unit extends, and the connection part rotatably connects the external connector in a state in which the control unit is separated from or approached to the rear surface side of the display unit and the external connector is disposed on a radially outer side.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a display device provided on a machine tool or the like, and more particularly to a display device in which a display unit and a control unit thereof are structurally independent. [Background technology]

[0002] Patent Document 1 below discloses a display device including a display unit and a control unit. In this display device, a control unit that is independent from the display unit is detachably connected to the rear surface of the display unit.

[0003] 16, an external connector 118 for connecting to the outside is connected to a display device 101 including a display unit 102 and a control unit 103. The external connector 118 is insertable into and removable from a connector (not shown) provided at the bottom end of the control unit 103 in the thickness direction (typically, the front-rear direction D1) of a housing 105 in which the display device 101 is provided. This increases the thickness of the housing 105, resulting in an increase in the size of the display device 101.

[0004] 16, the front-to-rear direction D1, the up-down direction D2, and the left-to-right direction D3 are defined when the display screen of the display unit 102 is viewed from the front. More specifically, the direction from the control unit 103 to the display unit 102 is defined as the front direction D11, and the opposite direction is defined as the rear direction D12, and these are collectively defined as the front-to-rear direction D1. Furthermore, the upward direction D21 and the opposite downward direction D22 are collectively defined as the up-to-down direction D2.

[0005] Therefore, it has been proposed to insert and remove the external connector in the same direction as the rear surface of the display unit. Typically, the external connector is provided at the bottom end of the control unit so that it can be inserted and removed in the vertical direction. This reduces the thickness of the housing and makes the display device more compact.

[0006] However, in this case, when attempting to insert or remove the external connector from the back side of the display unit, the external connector's socket into the control unit is difficult to see, making it difficult to insert or remove the external connector. Furthermore, the space for inserting or removing the external connector is narrow, making the work difficult. Therefore, it is conceivable to insert or remove the external connector while the control unit is detached from the display unit and placed on a workbench.

[0007] When the display unit is installed in the housing, the cables connected to the external connectors are fixed with clamps or bundled through ducts, which means there is almost no slack in the cables, making it often impossible to carry the control unit detached from the display unit to a workbench. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-38130 Summary of the Invention [Problem to be solved by the invention]

[0009] As described above, conventional display devices have had various problems. To solve these problems, a display device that has a compact configuration and allows easy insertion and removal of an external connector for connection to the outside is desired. [Means for solving the problem]

[0010] One aspect of the present disclosure is a display device comprising a display unit, a control unit that controls the display unit, and a connection part that connects the display unit and the control unit, wherein the connection part is detachable between the rear side of the display unit and the control unit, and an external connector is connectable to the control unit for connecting it to the outside, and when the control unit is fixed to the rear side of the display unit, the insertion and removal direction of the external connector is the direction in which the rear side of the display unit extends, and the connection part connects the control unit so that it can rotate so as to move away from or towards the rear side of the display unit, and so that the external connector can rotate freely when the external connector is positioned radially outward. [Effects of the Invention]

[0011] According to one aspect, it is possible to provide a display device that has a compact configuration and allows an external connector for connection to the outside to be easily inserted and removed. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective view showing a state in which a first embodiment of a display device of the present invention is used. [Figure 2] 1 is an exploded perspective view showing a display device according to a first embodiment of the present invention, viewed from the rear side. [Figure 3] 1 is a perspective view showing a display unit of a display device according to a first embodiment of the present invention, as viewed from the rear side. [Figure 4] 1 is a front view showing a control unit of a display device according to a first embodiment of the present invention. [Figure 5] 1 is a perspective view showing a control unit of a display device according to a first embodiment of the present invention, as viewed from the front side. [Figure 6] FIG. 2 is a perspective view showing a connection portion between the display unit and the control unit, with a portion shown in cross section. [Figure 7]1 is a side view showing a state in which the display device of the first embodiment of the present invention is in use, with a portion thereof in cross section, showing a state in which the control unit has been moved to the rear side relative to the display unit. [Figure 8] This is a side view showing the use state of the display device of the first embodiment of the present invention, with a portion in cross section, and shows the state in which the control unit has been moved downward from the state in Figure 7, perpendicular to the movement direction in Figure 7. [Figure 9] 9 is a perspective view showing the use state of the display device according to the first embodiment of the present invention, showing a state in which the control unit has been rotated (tilted) from the state of FIG. 8. FIG. [Figure 10] FIG. 10 is a perspective view showing a display unit of a display device according to a second embodiment of the present invention, as viewed from the rear side. [Figure 11] FIG. 10 is a side view, partly in cross section, showing a state in which the control unit has been moved to the rear side relative to the display unit, illustrating a state in which the display device according to the second embodiment of the present invention is in use. [Figure 12] 12 is a side view showing a state in which the display device according to the second embodiment of the present invention is in use, with a portion in cross section, showing a state in which the control unit has been rotated (tilted) from the state shown in FIG. [Figure 13] FIG. 10 is a plan view showing a control unit of a display device according to a third embodiment of the present invention. [Figure 14] FIG. 10 is a plan view showing a state in which a display device according to a third embodiment of the present invention is used. [Figure 15] FIG. 10 is a side view, partly in cross section, showing a state in which a display device according to a third embodiment of the present invention is in use. [Figure 16] FIG. 1 is an explanatory diagram showing the configuration of a conventional display device. DETAILED DESCRIPTION OF THE INVENTION

[0013] A display device according to one aspect of the present disclosure will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a display device 1 according to a first embodiment includes a display unit 2, a control unit 3 that controls the display unit 2, a connection section 4 that connects the display unit 2 and the control unit 3, and a housing 5 in which the display unit 2 and the control unit 3 are connected. The display device 1 is provided, for example, in a machine tool 6 that processes an object. The display device 1 is suspended from a main body 7 of the machine tool 6 via a support section 8. The display device 1 may also be attached to the outer surface of the main body 7 of the machine tool 6.

[0014] The display unit 2 has a liquid crystal display screen 9. Note that the display screen 9 is not limited to a liquid crystal display screen, and may be another type of display screen. The control unit 3 is, for example, a numerical control unit of a CNC (computer numerical control) machine tool 6.

[0015] In the following, the front-to-rear direction D1, the up-down direction D2, and the left-to-right direction D3 are defined when the display screen 9 of the display unit 2 is viewed from the front. More specifically, the direction from the control unit 3 to the display unit 2 (the direction from the lower right to the upper left in FIG. 2) is defined as the front direction D11 or front side D11, and the opposite direction is defined as the rear direction D12, rear side D12, or back side D12, and these are collectively defined as the front-to-rear direction D1. Furthermore, the upward direction D21 or upper side D21 (the upward direction in FIG. 2) and the opposite direction, the downward direction D22 or lower side D22, are collectively defined as the up-to-down direction D2. Furthermore, the left direction D31 or left side D31 (the direction from the lower left to the upper right in FIG. 2) and the opposite direction, the right direction D32 or right side D32, are collectively defined as the left-to-right direction D3. Arrows indicating these directions are illustrated in some drawings.

[0016] As shown in FIG. 1, a display screen 9 is disposed on the front (front side D11) of the display unit 2. As shown in FIGS. 2 and 3, a user interface unit 10, which is connected to an external device (not shown), is provided on the rear (rear side D12) of the display unit 2. The user interface unit 10 is detachably provided on the lower end (lower side D22) of the left side D31 of the rear of the display unit 2. A connector 11 is provided on the rear of the display unit 2. The connector 11 is provided on the upper end (upper side D21) of the left side D31 of the rear of the display unit 2. A pair of engagement portions 12, 13 are provided on the rear of the display unit 2 in the left-right direction D3. Of the pair of engagement portions 12, 13, the first engagement portion 12 is provided on the left end (left side D31) of the rear of the display unit 2, and the second engagement portion 13 is provided on the right end (right side D32) of the rear of the display unit 2. Insertion portions 14 are provided at the four corners of the rear of the display unit 2. Each insertion portion 14 is rod-shaped, provided on the rear surface of the display unit 2, and protrudes in the rear direction D12.

[0017] As shown in Figures 2, 4, and 5, the control unit 3 has a box-shaped housing 15. A control unit (not shown) that controls the display unit 2 is housed inside the housing 15. A through-hole 17 that penetrates in the front-to-rear direction D1 is provided in a front plate 16 of the housing 15. A connector (not shown) that connects to the connector 11 of the display unit 2 is provided inside the housing 15 at a position corresponding to the through-hole 17. The housing 15 is provided with a pair of engaged portions (not shown). One of the pair of engaged portions is provided on the left plate of the housing 15, and the other engaged portion is provided on the right plate. The function of this pair of engaged portions will be described later.

[0018] A plurality of external connectors 18 for connecting to the outside can be freely connected to the control unit 3. Each external connector 18 is removably connected to a connector (not shown) provided at the bottom of the control unit 3. In the illustrated example, the insertion and removal direction of the external connectors 18 is the up-down direction D2, which is a direction perpendicular to the thickness direction of the control unit 3 (usually the front-back direction D1).

[0019] The connection portion 4 includes a bent portion 19, a first locked portion 20, a first contact portion 21, and a second contact portion 22. As shown in FIGS. 2 to 5, the bent portion 19 and the first contact portion 21 are disposed on the rear side D12 of the display unit 2, and the first locked portion 20 and the second contact portion 22 are disposed on the front side (front side D11) of the control unit 3. In the connection portion 4 of the first embodiment, the bent portion 19 and the first contact portion 21 are integrated together to form a first connection portion 23. The first connection portions 23, 23 are provided as a pair in the left-right direction D3. The first locked portion 20, the second contact portion 22, and a through-hole 27 (described later) form a second connection portion 24. The second connection portions 24, 24 are provided as a pair in the left-right direction D3. On the left side D31 and the right side D32, the first connecting portion 23 and the second connecting portion 24 face each other in the front-rear direction D1 and form a pair of connecting portions.

[0020] The pair of first connection portions 23, 23 are configured integrally with the display unit 2. Of the pair of first connection portions 23, 23, one first connection portion 23 is provided at the upper end of the left side D31 of the rear surface of the display unit 2, and the other first connection portion 23 is provided at the upper end of the right side D32 of the rear surface of the display unit 2.

[0021] Each first connection portion 23 has a plate-shaped plate portion 25 connected to the rear surface of the display unit 2 and a bent portion 19 bent upward (upward direction D21). The plate portion 25 is connected to the upper end of the rear surface of the display unit 2 and extends toward the rear side D12. The plate surface of the plate portion 25 faces the up-down direction D2. The bent portion 19 is provided at the rear end (rear side D12) of the plate portion 25. The bent portion 19 is connected to the plate portion 25 so as to be bent toward the upward direction D21. In the first embodiment, the bent portion 19 is provided integrally with the plate portion 25. Note that the bent portion and the plate portion may be separate bodies. As shown in FIGS. 2 and 3 , the bent portion 19 is provided in approximately the center of the plate portion 25 in the left-right direction D3. Therefore, the plate portion 25 has a portion that extends outward in the left-right direction D3 beyond the bent portion 19. This outwardly extending portion becomes the first contact portion 21. That is, both end portions of the plate piece portion 25 in the left-right direction D3 are the first contact portions 21.

[0022] The pair of second connection portions 24, 24 are configured integrally with the control unit 3. Of the pair of second connection portions 24, 24, one second connection portion 24 is provided at the upper end of the left side D31 of the control unit 3, and the other second connection portion 24 is provided at the upper end of the right side D32 of the control unit 3.

[0023] Each second connection portion 24 has a first locked portion 20 with which the bent portion 19 is locked, and a second abutting portion 22 that abuts against the first abutting portion 21. The first locked portion 20 includes a through-hole that penetrates the upper plate 26 of the housing 15 of the control unit 3 in the up-down direction D2. The first locked portion 20 has a rectangular shape in a plan view. The second abutting portion 22 is a pair of plate-like portions that are provided on the inner surface side of the upper plate 26 of the housing 15 of the control unit 3. The pair of second abutting portions 22, 22 extend downward from the upper plate 26. The pair of plate-like second abutting portions 22, 22 each extend along the front-rear direction. In other words, the abutting surface of each second abutting portion 22 faces the up-down direction D2. The pair of second abutting portions 22 are arranged to sandwich the first locked portion 20. 4 and 5, a through hole 27 is provided in the front plate 16 of the housing 15 of the control unit 3 on the front side D11 of each first locked portion 20. The through hole 27 is a hole that penetrates the front plate 16 in the front-rear direction D1 and extends in the front-rear direction D1.

[0024] The display device 1 has this configuration. Therefore, by linearly approaching the control unit 3 to the display unit 2 in the forward direction D11 and passing the first connection portion 23 of the display unit 2 through the through-hole 27 of the control unit 3, the display unit 2 and the control unit 3 are connected at their upper portions, as shown in FIG. 6 . In this state, the pair of engaging portions 12, 13 engage with the pair of engaged portions (not shown) of the housing 15. The connector 11 of the display unit 2 is inserted into the housing 15 through the through-hole 17. When the display unit 2 and the control unit 3 are connected, the pair of second abutting portions 22, 22 abut against the first abutting portions 21 on both the left and right sides of the plate portion 25. Specifically, of the pair of second abutment portions 22, 22, the left second abutment portion 22 abuts against the left first abutment portion 21 of the plate portion 25, and the right second abutment portion 22 abuts against the right first abutment portion 21 of the plate portion 25.

[0025] As described above, the pair of second abutment portions 22, 22 are arranged to sandwich the first locked portion 20. Therefore, when the display unit 2 and the control unit 3 are connected, the pair of second abutment portions 22, 22 do not come into contact with the bent portion 19. In other words, the pair of second abutment portions 22, 22 are arranged at positions on the control unit 3 side where they do not interfere with the bent portion 19.

[0026] With the control unit 3 fixed to the rear side D12 of the display unit 2 in this manner, the insertion / removal direction of the external connector 18 is the direction in which the rear surface of the display unit 2 extends. As described above, in ordinary prior art, the insertion / removal direction of the external connector 18 is the thickness direction of the display unit 2. In contrast, in the illustrated example of the present invention, the insertion / removal direction of the external connector 18 disposed at the lower end of the control unit 3 is the up-down direction D2.

[0027] The control unit 3 can be removed from the display unit 2 by moving the control unit 3 in the rear direction D12 from a state in which the control unit 3 is fixed to the display unit 2. By moving the control unit 3 in the rear direction D12, the first connection portion 23 comes off the control unit 3, and the connection between the display unit 2 and the control unit 3 is released. Therefore, the connection portion 4 can detach the control unit 3 from the display unit 2 by moving the control unit 3 linearly away from the rear side of the display unit 2 in the rear direction D12. As described above, the connection portion 4 can connect the display unit 2 and the control unit 3. Therefore, the connection portion 4 can freely attach and detach the control unit 3 to and from the rear side D12 of the display unit 2.

[0028] As shown in FIG. 1 , the housing 5 has a rectangular box shape. The display unit 2 is attached to the front panel of the housing 5. When attaching the display unit 2 to the housing 5, the insertion portion 14 provided on the display unit 2 is inserted into an insertion hole (not shown) provided on the front panel of the housing 5. Then, in this state, the display unit 2 is fixed to the housing 5 with screws or the like. With the display unit 2 fixed to the housing 5, the control unit 3 fixed to the display unit 2 is accommodated in the housing 5 through an opening (not shown) provided on the front panel of the housing 5. In this manner, the display unit 2 and the control unit 3 are attached to the housing 5.

[0029] The housing 5 is suspended from the main body 7 of the machine tool 6 via a support 8. The housing 5 is provided on the support 8 so as to be rotatable about an axis along the vertical direction D2. Therefore, after rotating the display device 1 from the state shown in FIG. 1, the control unit 3 is exposed by removing the rear plate from the housing 5. This makes it easy to perform work on the control unit 3.

[0030] Next, the operation of the display device 1 when performing work on the control unit 3 will be described. When performing work on the control unit 3, as described above, the control unit 3 provided in the housing 5 is exposed. Then, as shown in FIG. 7, the control unit 3 is moved in the rear direction D12 from a state where it is fixed to the display unit 2. The control unit 3 is moved in the rear direction D12 until the contact between the first contact portion 21 and the second contact portion 22 is released. In a state where the contact between the first contact portion 21 and the second contact portion 22 is released, the bent portion 19 is located inside the control unit 3.

[0031] 8, the control unit 3 is moved in the downward direction D22 relative to the display unit 2. As a result, the bent portion 19 is locked to the first locked portion 20. Specifically, the tip end of the bent portion 19 passes through the first locked portion 20, and the base end of the bent portion 19 comes into contact with the upper plate 26. Therefore, in the process of linearly separating the control unit 3 from the rear side of the display unit 2 in the rear direction D12, the connection portion 4 can form the lock between the bent portion 19 and the first locked portion 20 by moving the control unit 3 in a direction different from the linear separating direction (here, the downward direction D22).

[0032] 9, in the first embodiment, when the bent portion 19 is engaged with the first engaged portion 20, the control unit 3 can be rotated around the engaging portion between the bent portion 19 and the first engaged portion 20 as a fulcrum, with the left-right direction D3 as a rotation axis (rotation center). Therefore, the connection portion 4 connects the control unit 3 to the display unit 2 so that the control unit 3 can rotate toward or away from the rear side D12 of the display unit 2. Because the control unit 3 is rotatable with respect to the display unit 2, the lower end of the control unit 3 can move toward or away from the display unit 2. Therefore, the connection portion 4 connects the control unit 3 to the display unit 2 so that the external connector 18 can rotate with the external connector 18 disposed radially outward (on the side farther from the rotation axis).

[0033] In the display device 1 of the first embodiment, the insertion and removal direction of the external connector 18 provided on the control unit 3 is the same as the direction in which the back surface of the display unit 2 extends. This allows the display device 1 to be made more compact. In the display device 1 of the first embodiment, the control unit 3 is rotatable relative to the display unit 2. Therefore, when inserting or removing the external connector 18 from the back surface side of the control unit 3, the control unit 3 can be rotated upward relative to the display unit 2. This allows the connector (not shown), which is the connecting portion of the external connector 18 to the control unit 3, to be easily visible, making it possible to easily insert or remove the external connector 18 from the control unit 3.

[0034] In the display device 1 of the first embodiment, the connection portion 4 includes a bent portion 19, a first locked portion 20, a first contact portion 21, and a second contact portion 22. Therefore, according to the display device 1 of the first embodiment, the connection portion 4 can have a simple configuration.

[0035] In the display device 1 of the first embodiment, in the process of linearly separating the control unit 3 in the rear direction D12 from the rear side of the display unit 2, the bent portion 19 can be locked to the first locked portion 20 by moving the control unit 3 in a direction (downward direction D22) different from the linear separating direction (rear direction D12). Therefore, according to the display device 1 of the first embodiment, the bent portion 19 can be easily locked to the first locked portion 20.

[0036] Next, a second embodiment of the display device of the present invention will be described with reference to Figures 10 and 11. Note that components having the same reference numerals as those in the first embodiment have the same functions, and therefore their description may be omitted below. The display device 1a of the second embodiment differs from the first embodiment in the configuration of the connection section 4. Specifically, the connection section 4 includes a pair of hinge sections 28, 28 arranged on the rear side D12 of the display unit 2, and a pair of slide locking sections 29, 29 arranged on the front side D11 of the control unit 3.

[0037] The pair of hinge portions 28, 28 are configured integrally with the display unit 2. Of the pair of hinge portions 28, 28, one hinge portion 28 is provided at the upper end of the left side D31 of the rear surface of the display unit 2, and the other hinge portion 28 is provided at the upper end of the right side D32 of the rear surface of the display unit 2.

[0038] Each hinge portion 28 has a plate-shaped fixed piece 30 and a plate-shaped movable piece 31. The fixed piece 30 and the movable piece 31 are rotatably connected to each other. The rotation axis extends in the left-right direction D3. As shown in FIG. 10 , the fixed piece 30 is fixed to the rear surface of the display unit 2 with screws 32 or the like, thereby fixing the hinge portion 28 to the rear surface of the display unit 2. When the hinge portion 28 is fixed to the display unit 2, the movable piece 31 extends substantially horizontally from the display unit 2. The hinge portion 28 of the second embodiment is configured so that the movable piece 31 does not rotate downward from the state in which it extends horizontally. The movable piece 31 has a second locked portion 33. The second locked portion 33 is a hole that penetrates the movable piece 31.

[0039] The pair of slide locking portions 29, 29 are configured integrally with the control unit 3. Of the pair of slide locking portions 29, 29, one slide locking portion 29 is provided at the upper end portion of the left side D31 of the control unit 3, and the other slide locking portion 29 is provided at the upper end portion of the right side D32 of the control unit 3.

[0040] As will be described later, each slide locking portion 29 is slidable along the movable piece 31. The slide locking portion 29 is provided on the upper plate 26 by providing a continuous groove 34 in the upper plate 26 (by hollowing out the upper plate 26). The groove 34 includes a first groove (not shown), a second groove (not shown), and a third groove 343. The first groove and the second groove are spaced apart in the left-right direction D3. The first groove and the second groove penetrate the upper plate 26 in the up-down direction D2. The first groove and the second groove extend in the front-rear direction D1. The third groove 343 penetrates the upper plate 26 in the up-down direction D2. The third groove 343 connects the front end of the first groove and the front end of the second groove (the end on the front side D11). The slide locking portion 29 is provided on the upper plate 26 by providing the first groove, the second groove, and the third groove 343. The plate-shaped slide locking portion 29 is elastically deformable upward and downward with its rear end (the end on the rear side D12) as a fulcrum. The slide locking portion 29 has a protrusion 35 that locks onto the second locked portion 33. The protrusion 35 is provided on the inner surface of the slide locking portion 29. The protrusion 35 protrudes downward in the direction D22 from the slide locking portion 29. The front surface of the protrusion 35 is an inclined surface that slopes downward in the direction D22 as it approaches the rear direction D12.

[0041] 11 and 12, a through hole 36 is provided in the front plate 16 of the housing 15 of the control unit 3 on the front side D11 of each slide locking portion 29. The through hole 36 is a hole that penetrates the front plate 16 in the front-rear direction D1.

[0042] The display device 1a of the second embodiment has this configuration. Therefore, the display unit 2 and the control unit 3 are connected by linearly approaching the control unit 3 in the forward direction D11 relative to the display unit 2 and passing the movable piece 31 of the hinge portion 28 through the through-hole 36 of the control unit 3. When the control unit 3 is brought closer to the display unit 2 while passing the movable piece 31 through the through-hole 36, the rear end of the movable piece 31 comes into contact with the front surface of the protrusion 35. When the control unit 3 is brought further closer to the display unit 2 from this state, the protrusion 35 comes into contact with the upper surface of the movable piece 31 with the slide locking portion 29 elastically deformed upward. Then, when the control unit 3 is brought further closer to the display unit 2, the slide locking portion 29 slides along the movable piece 31 with the protrusion 35 in contact with the upper surface of the movable piece 31.

[0043] In this manner, when the control unit 3 is fixed to the display unit 2, the control unit 3 can be removed from the display unit 2 by moving the control unit 3 in the rear direction D12. By moving the control unit 3 in the rear direction D12, the movable piece 31 comes out of the control unit 3, and the connection between the display unit 2 and the control unit 3 is released.

[0044] Next, the operation of the display device 1a when performing work on the control unit 3 will be described. When performing work on the control unit 3, the control unit 3 provided in the housing 5 is exposed, as described above. Then, as shown in FIG. 11 , the control unit 3 is moved in the rear direction D12 from a state where it is fixed to the display unit 2. When the control unit 3 is moved in the rear direction D12, the slide locking portion 29 slides along the movable piece 31 with the protrusion 35 in contact with the upper surface of the movable piece 31. Then, when the protrusion 35 reaches the second locked portion 33 of the movable piece 31, the protrusion 35 deforms downward and is inserted into the second locked portion 33. As a result, the protrusion 35 of the slide locking portion 29 is locked to the second locked portion 33. As shown in FIG. 12 , in the second embodiment, the control unit 3 can be rotated upward or downward by the hinge portion 28 with the slide locking portion 29 locked to the second locked portion 33.

[0045] Therefore, when inserting or removing the external connector 18 from the rear side D12 of the control unit 3, the control unit 3 can be rotated upward relative to the display unit 2. This makes it easy to see the connector (not shown) that is the connecting portion of the external connector 18 to the control unit 3, and therefore the external connector 18 can be easily inserted or removed from the control unit 3.

[0046] In the display device 1a of the second embodiment, the connection portion 4 includes a hinge portion 28 arranged on the display unit 2 side and a slide locking portion 29 arranged on the control unit 3 side. Therefore, according to the display device 1a of the second embodiment, the connection portion 4 can be simply configured. Because the display device 1a has such a configuration, the slide locking portion 29 and the second locked portion 33 can be locked together simply by moving the control unit 3 in the rear direction D12 relative to the display unit 2. Therefore, according to the display device 1a of the second embodiment, the operation of the display device 1a can be easily performed when performing work on the control unit 3.

[0047] Next, a third embodiment of the display device of the present invention will be described with reference to Figures 13, 14, and 15. Note that components having the same reference numerals as those in the first embodiment have similar functions, and therefore their description may be omitted below. The display device 1b of the third embodiment can maintain a state in which the control unit 3 is tilted relative to the display unit 2. Specifically, the connection portion 4 includes a locking holding portion 37 that maintains the lock between the bent portion 19 and the first locked portion 20.

[0048] The locking holder 37 has a groove 38 provided in the upper plate 26 of the housing 15 of the control unit 3. The groove 38 penetrates the upper plate 26 in the up-down direction D2. The groove 38 is provided in the upper plate 26 so as to be continuous with the front end of the first locked portion 20. The groove 38 extends from the first locked portion 20 in one of the left-right directions D3. In the illustrated example, the groove 38 extends from the first locked portion 20 in the left direction D31, but it may also extend in the right direction D32.

[0049] 13 and 15, an inclined surface 39 is provided inside the housing 15. The inclined surface 39 inclines downward in a direction D22 as it extends forward in a direction D11 when the control unit 3 is fixed to the display unit 2. The inclined surface 39 is located on the lower side D22 of the groove 38.

[0050] The display device 1b of the third embodiment has this configuration. Therefore, as in the first embodiment, the control unit 3 is rotated upward, and then slid in the other of the left-right directions D3, whereby the bent portion 19 moves into the groove 38. In the illustrated example, the groove 38 extends in the left direction D31, so the control unit 3 is slid in the right direction D32. When the bent portion 19 moves into the groove 38, the bent portion 19 comes into contact with the inclined surface 39, as shown in FIGS. 14 and 15 . This allows the control unit 3 to maintain an inclined state relative to the display unit 2 while the bent portion 19 and the first locked portion 20 are locked together. Therefore, the locking holder 37 can maintain the locking of the bent portion 19 and the first locked portion 20 by moving the control unit 3 in a direction different from the moving direction for locking the bent portion 19 and the first locked portion 20 together.

[0051] In the display device 1b of the third embodiment, the control unit 3 can be kept tilted relative to the display unit 2. Therefore, according to the display device 1b of the third embodiment, the operator does not need to support the control unit 3 in a tilted state when inserting or removing the external connector 18. This makes it easier to insert or remove the external connector 18.

[0052] The present invention is not limited to the embodiments, and modifications and improvements within the scope of achieving the object of the present invention are included in the present invention.

[0053] For example, the direction in which the rotation axis (rotation center) of the control unit 3 extends is not limited to the left-right direction D3, and may be the up-down direction D2. The linear separation direction is not limited to the front-rear direction D1 (rear direction D12). The direction different from the linear separation direction (the movement direction for forming the engagement between the bent portion 19 and the first locked portion 20) is not limited to the downward direction D22, and may be an obliquely downward direction. The direction different from the movement direction for forming the engagement between the bent portion 19 and the first locked portion 20 is not limited to the left-right direction D3.

[0054] In the second embodiment, the hinge portion may be capable of setting the angle between the fixed piece and the movable piece to a predetermined angle. Typically, the hinge portion may be a torque hinge.

[0055] In the second embodiment, the connector between the display unit 2 and the control unit 3 may be an FPC (Flexible Printed Circuits). [Explanation of symbols]

[0056] 1 Display device 2 Display Unit 3. Control Unit 4 Connection 18 External Connector 19 Bend 20 First locked part 21 1st contact part 22 Second contact part 28 Hinge part 29 Slide locking part 30 Fixed piece 31 Movable piece 33 Second locked part 37 Locking holding part

Claims

1. A display device comprising: a display unit; a control unit that controls the display unit; and a connection unit that connects the display unit and the control unit, the connection section is detachable between the rear side of the display unit and the control unit, an external connector for connecting the control unit to the outside is connectable to the control unit; When the control unit is fixed to the rear side of the display unit, the insertion and removal direction of the external connector is the direction in which the rear surface of the display unit extends, A display device in which the connection portion connects the control unit so that it can rotate freely so that it moves away from or towards the rear side of the display unit, and so that the external connector can rotate freely while the external connector is positioned radially outward.

2. 2. The display device according to claim 1, wherein the connection portion comprises a bent portion arranged on the rear side of the display unit and bent upward, and a first engaging portion arranged on the control unit side and engaging with the bent portion.

3. 3. The display device of claim 2, wherein the connection portion is capable of detaching the control unit from the display unit by linearly separating the control unit from the rear side of the display unit, and wherein, in the process of linearly separating the control unit from the rear side of the display unit, the connection portion is capable of forming an engagement between the bent portion and the first engaging portion by moving the control unit in a direction different from the linear separation direction.

4. The display device according to claim 2 , wherein the connecting portion further comprises a locking holding portion that holds the bent portion and the first locked portion in engagement with each other.

5. The display device described in claim 4, wherein the engagement holding portion maintains the engagement between the bending portion and the first engaging portion by moving the control unit in a direction different from the movement direction for forming the engagement between the bending portion and the first engaging portion.

6. 6. A display device as described in any one of claims 2 to 5, wherein the connection portion comprises a first abutment portion arranged on the rear side of the display unit, and a second abutment portion arranged in a position not interfering with the bent portion on the control unit side and abutting the first abutment portion.

7. the connecting portion is disposed on the rear side of the display unit and includes a hinge portion having a fixed piece and a movable piece, and a slide engaging portion is disposed on the control unit side and is slidable along the movable piece, the movable piece of the hinge portion includes a second locked portion, The display device according to claim 1 , wherein the slide locking portion includes a protruding portion that protrudes downward and is locked onto the second locked portion.

8. The display device according to claim 7 , wherein the hinge portion is capable of setting the angle formed between the fixed piece and the movable piece to a predetermined angle.

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