JPH07170081A - Display device - Google Patents

Abstract

PURPOSE:To dispense with a change in the basic structure of a housing independent of whether an extension board is built in or not. CONSTITUTION:A housing 10 is composed of a body 11 on whose front a display is mounted and a cover 12 mounted on the rear of the body 11. A control board 30 which controls a display section is housed inside the housing 10. An extension spacer 13 which provides a space wherein an extension board 4 that is mounted as being interposed between the body 11 and the cover 12 so as to enlarge a display device in function is provided. When the extension board 4 is mounted, the extension spacer 13 is adjunctively utilized. By this setup, the housing 10 composed of the body 11 and the cover 12 is not required to be changed in basic structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly to a structure in which an extension board is incorporated for expanding functions.

[0002]

2. Description of the Related Art The basic construction of a general operation display device is shown in FIG.
Shown in. The operation display device A includes an operation unit 1 including a switch operated by an operator B, and a liquid crystal display (LCD) for performing a display necessary for the operator A to perform an operation, for example, a display according to an operation of the operation unit 1. ) Etc. display section 2
And a control unit 3 that controls the display of the display unit 2 according to the operation of the operation unit 1 by the operator A. here,
The control unit 3 is usually composed of a microcomputer including a CPU, a memory and the like.
It includes a power supply circuit that supplies power to the operation unit 1 and the display unit 2 itself.

The operation display device A is, for example, a predetermined program (for example, a program arbitrarily created by the user).
Accordingly, it can be used as an operation unit for inputting data and the like such as a programmable controller for automatically controlling the operation of a device sequentially, or as a terminal of a computer. Here, when the operation display device A is used as an operation unit of a programmable controller, it is necessary to communicate with a CPU unit that performs a central function of the programmable controller, and also when it is used as a terminal of a computer. , Need to communicate with the computer. Therefore, the control unit 3 of the operation display device A is provided with an interface (I / F) 3a for communicating with a CPU unit or a computer. In the following description, the CPU unit and the computer will be collectively referred to as a host controller C.

By the way, when the communication function with the host controller C is expanded or the switch of the operation unit 2 is expanded, the expansion board 4 on which the circuit for the expanded function is mounted is incorporated in the operation display device A. . The expansion of the communication function with the host controller C includes the addition of an interface function with another control device. Also,
This includes cases where mutual expansion or addition of functions is required due to expansion of interface functions or expansion of switches.

[0005]

However, in the conventional operation display device A of this type, in order to newly install the extension board 4, it is necessary to newly produce a housing 10 itself which is changed. Therefore, the cost is significantly increased and the housing 10 is complicated to manage because only the additional board 4 is added.

The present invention has been made in view of the above points, and it is an object of the present invention to change the basic housing structure regardless of whether or not an extension board is incorporated. It is to provide a display device.

[0007]

In order to achieve the above object, the invention comprises a housing having a body to which a display unit is attached on the front side and a cover attached to the back side of the body. In a display device in which a control unit for controlling the display unit is housed inside a housing, an additional spacer is provided which is installed between the body and a cover and has a space for accommodating an additional board incorporated when expanding the function. Is equipped with.

As described in claim 2, when the extension board is incorporated by using the extension spacer, an opening is formed in the housing for electrical connection between the extension board and an external device, and the opening goes to the outside. It is desirable to mount the connector on the extension board with the mounting surface facing.

[0009]

According to the first aspect of the invention, with the above-described configuration, when the extension board is incorporated, the extension spacer can be additionally used to incorporate the extension board. This avoids any modification of the basic housing structure consisting of body and cover.

According to the second aspect of the present invention, an opening for wiring for electrically connecting the extension board and the external device is formed in the housing in advance, so that the electrical connection between the extension board and the external device is not hindered. To be able to do it.

[0011]

EXAMPLE FIG. 3 shows the basic configuration of the operation display device A of this example.
FIG. 1 shows the configuration when the expansion board 4 for function expansion is added. As shown in FIG. 3, the housing 10 of the operation display device A of the present embodiment basically has a body 11 and a cover 12 attached to the back surface of the body 11.
Consists of. When the extension board 4 is incorporated, an extension spacer 13 is added as a constituent member of the housing 1 as shown in FIG.

The body 11 is formed in a box shape having an opening on the back side, and a display portion 20 including a liquid crystal display (LCD) or the like is attached to the front surface thereof. An outer brim portion 11b is provided around the front portion of the body 11 so as to have a thickness around the display portion 20. Here, the display unit 20 integrally incorporates an operation unit including a plurality of touch switches. That is, the operation unit 1 and the display unit 2 in FIG.
And are integrated. Display unit 2 including the operation unit of the present embodiment
0 is formed by being mounted on the display unit board 21 made of a printed circuit board or the like. By incorporating the display unit board 21 into the body 11, the display unit 20 is integrated with the body 11. A notch 11a is provided on one side surface of the body 11.
Has been formed.

The cover 12 has a box-like shape with an open front surface that closes the back surface of the body 11, and a convex portion 12a is provided on one side of the cover 12 so as to project forward. In other words, the additional spacer 13
When not using, the convex portion 12a is fitted into the notch 11a of the body 11 and assembled in the shape of FIG. With the cover 12 thus attached, the housing 1
In the inside of 0, a control unit board 30 on which the circuit components of the control unit 3 are mounted is housed. Control board 30
Is formed into an outer shape that is positioned inside the body 11 when it is housed inside the body 11. Here, a plurality of bosses 5 are erected from the display board 21 toward the back, and the bosses 5 are used as spacers to maintain the distance between the display board 21 and the control board 30, and A screw is screwed into the screw hole formed on the end face of the control board 30.
To fix.

By the way, in the case of the present embodiment, a strong display board 21 is used. Therefore, in order to fix the cover 12 to the body 11, the boss 5 is also used for fixing the controller board 30. That is, the insertion hole 12d formed on the back surface of the cover 12
Through the screw into the screw hole of the boss 5, and the body 11
The cover 12 is fixed to. Then, the cover 12 is attached to the boss 5.
When it is screwed on, the control unit board 30 is also fastened together and fixed. Needless to say, the mounting parts of the controller board 30 do not contact the bottom surface of the cover 12. However, the body 11 and the cover 12 may be separately fixed by screwing or fitting, which is preferable especially when the strength of the display board 21 is weak.

On the control unit board 30, a pair of power supply terminals 31 for connecting a power supply line for supplying commercial power to the power supply circuit of the control unit 3 and an interface 3a of the control unit 3 are connected to the host controller C by connectors. Connector 3
2 and are implemented. The cover 12 is formed with openings 12b and 12c for exposing the power supply terminal 31 and the connector 32 so that the power supply line and the connector can be connected from the back side of the cover 12.

The above description has been made in the case where the extension board 40 is not incorporated. Next, the case where the extension board 40 is incorporated will be described. In this case, the body 11
The additional spacer 13 is attached between the cover 12 and the cover 12.
The following description will be given assuming that the interface function with another control device as the host controller C in FIG. 5 is added.

The extension spacer 13 has a rectangular frame shape and has a width in the front-rear direction corresponding to the thickness of the extension board 4. A concave portion 13a is formed on one side surface of the additional spacer 13, and the convex portion 12a of the cover 12 is fitted into the concave portion 13a when the cover 12 is fixed to the rear surface side of the additional spacer 13. The extension board 4 is provided with bosses 5 at four corners. The above-mentioned thickness of the extension board 4 means the thickness including the boss 5 for keeping the interval with the control unit board 30 and screwing the control unit board 30.
Although not shown, the extension board 4 is electrically connected to the display board 21 by connector wiring or the like.

Here, as a concrete fixing method with the body 11, one having a threaded portion at the end portion on the side of the extension board 4 is used as the boss 5, and the threaded portion of this boss 5 is used as the boss of the display board 21. It suffices to screw it into the screw hole of No. 5 to fix it. The extension board 4 may be fixed in the body 11 by other methods. Expansion board 4 above
Along with the expansion of the interface function, a connector 41 is mounted for wiring between the expanded interface and another control device. Where the connector 41
Is mounted on the end facing the notch 11a, and its mounting surface is shown in FIG.
As shown in (a), the notch 11a of the body 11 faces the outer surface. With this configuration, the notch 11a is used as a wiring passage for the case where the extension board 4 is incorporated, and electrical connection between another control device and the extension board 4 can be performed without any trouble. In FIG. 2B, the connector 60 attached to the tip of the signal line 61 is attached to the connector 41 for electrical connection. Moreover, when the extension board 4 is not incorporated, as shown in FIG. 4, the protrusion 12a of the cover 12 is fitted into the notch 11a to close the notch 11a, so that an unnecessary opening is opened in the housing 10. There is no such thing.

The control board 30 is fixed to the boss 5 of the extension board 4 by screwing. Here, in the case of the present embodiment, a strong one is used as the expansion board 4, and since the expansion board 4 is reinforced by the expansion spacer 13, the cover 12 also uses the boss 5 of the expansion board 4. I fixed it. That is, the extension spacer 13
The cover 12 is fixed so as to be sandwiched between the body 11 and the cover 12, and the control unit board 30 is fixed together with the cover 12 by tightening.

When the extension spacer 13 is fixed to the body 11 without using the boss 5, the cover 12 may be fixed to the extension spacer 13 without using the boss 5 of the extension board 4. . However, in order to fix the body 11, the cover 12, and the additional spacer 13 regardless of whether or not the additional spacer 13 is attached, a fixing method for fixing the additional spacer 13 to the body 11 and a fixing method. The position, the fixing method of fixing the cover 12 to the additional spacer 13 and the fixing position are as follows.
It goes without saying that it is necessary to match the fixing method for fixing with respect to 1 and the fixing position. In the case of the co-fastening method of the present embodiment, there is an advantage that the number of assembling steps can be reduced and the assembling can be facilitated. Therefore, which fixing method should be adopted may be appropriately selected.

According to this embodiment, it is possible to cope with the addition of the extension board 4 for expanding the function only by using the insulating spacers 4, and as the body 11 or the cover 12, it is necessary to add the extension board 4 individually. There is no need to use things. Therefore, it is possible to manufacture a product with expanded functions at low cost,
Moreover, there is an advantage that the body 11 and the cover 12 can be easily managed. Moreover, since the additional spacer 4 has a rectangular frame shape and has a simple structure in which the recess 13a is formed on the side surface, the additional spacer 4 can be manufactured by a simple mold, and the additional spacer 4 itself is inexpensive. For example, the additional spacer 4 itself can be manufactured at a low cost by using a mold that does not require an extra mold such as a side core having the front-rear direction in FIG.

[0022]

As described above, according to the invention of claim 1, the housing is constituted by the body having the display unit attached to the front surface and the cover attached to the back side of the body, and the display unit is provided inside the housing. In the display device that contains the control unit that performs control, the expansion board is installed between the body and the cover, and is equipped with an expansion spacer that provides a space for the expansion board that is installed when expanding the function. In the case of incorporating, the extension spacer can be used as an accessory to incorporate the extension board, and it is not necessary to change the basic structure of the housing including the body and the cover. For this reason, the expanded function can be manufactured at low cost, and the body and cover can be easily managed.

According to the second aspect of the present invention, when the extension board is incorporated by using the extension spacer, an opening is formed in the housing to electrically connect the extension board and an external device,
The connector is mounted on the extension board with the mounting surface facing the outside from the opening, and a wiring opening for electrically connecting the extension board and an external device is formed in the housing in advance. Therefore, the electrical connection between the extension board and the external device can be performed without any trouble.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a case where an extension board according to an embodiment of the present invention is added.

2 (a) and 2 (b) are a side view after assembly and an explanatory diagram of a method of wiring an extension board, respectively.

FIG. 3 is an exploded perspective view when an additional board is not added.

4 (a) and 4 (b) are a perspective view and a side view after the above assembling.

FIG. 5 is a block diagram showing a circuit configuration of the above.

[Explanation of symbols]

 4 Expansion Board 10 Housing 11 Body 11a Notch 12 Cover 13 Expansion Spacer 20 Display 30 Control Board 41 Connector

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] December 27, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

2. Description of the Related Art The basic construction of a general operation display device is shown in FIG.
Shown in. Operator B operates this operation display device A.
Operation unit 1 including a switch and an operator A
Display required for operation, for example, operation unitTwoIn response to
Display unit such as liquid crystal display (LCD) that performs the same display1
And the operation unit of operator ATwoDisplay according to the operation of1of
The control unit 3 controls the display. here,
The control unit 3 is usually a microphone including a CPU and a memory.
The control unit 3 is composed of a computer.
Itself, operation unitTwo, And display1Power supply to supply power to
Including the road.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

By the way, there is a cover 12 to be shared with a fixed controller board 30 to the boss 5 to be fixed to the body 11. That is, the cover 12 is fixed to the body 11 by screwing a screw into the screw hole of the boss 5 through the insertion hole 12d formed on the back surface of the cover 12. And
When the cover 12 is screwed to the boss 5, the control unit board 30 is also tightened and fixed together. Needless to say, the mounting parts of the controller board 30 do not contact the bottom surface of the cover 12. However, the body 11 and the cover 12 may be fixed separately by screwing or fitting.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

The above description has been made in the case where the extension board 4 is not incorporated. Next, the case where the extension board 4 is incorporated will be described. In this case, the additional spacer 13 is attached between the body 11 and the cover 12. The following description will be given assuming that the interface function with another control device as the host controller C in FIG. 5 is added.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Nishino 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd.

Claims (2)

[Claims] 1. A display device comprising a body having a display unit attached to the front surface and a cover attached to the back side of the body, the housing including a control unit for controlling the display unit inside the housing. A display device, characterized by comprising an extension spacer which is mounted between a body and a cover and which has a space for accommodating an extension board incorporated when expanding a function. 2. When the extension board is incorporated by using the extension spacer, an opening is formed in the housing to electrically connect the extension board and an external device, and the attachment surface is exposed from the opening to the outside. The display device according to claim 1, wherein a connector is mounted on the display device.