JPH11312004A - Display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display whose switch can be operated from a front panel side while water proof and dust proof between the front panel and the box-shaped inside part of the body can be maintained. SOLUTION: This display part is provided with a body 1 having a front panel 11 formed almost like a box, a screen mounted on the front panel 11 for displaying the operating situation of a connected outside equipment, a control to be operated from the front panel 11 side for controlling the outside equipment, and a switch 3 for preventing the misoperation of the control. The switch 3 is provided with a sensor 31 arranged at a bottom 13a of a recess 13 provided at the front panel 11, and a key 32 whose base terminal is inserted into the recess 13 for operating the sensor 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display which is connected to a programmable controller or the like to display the operation status of an external device and controls the external device via the programmable controller or the like.

[0002]

2. Description of the Related Art Conventionally, as this type of display, there is a display having the structure shown in FIGS. This device has a body A formed in a substantially box shape and provided with a front panel A1, a screen section B mounted on the front panel A1 to display the operation status of an external device connected thereto, and operated from the front panel A1 side. An operation unit C for controlling the external device and a switch unit D for preventing erroneous operation of the operation unit C are provided.

More specifically, the operation unit C is formed by a screen switch provided on a display screen displayed on the screen unit B. Further, a through-hole A2 is provided in the body A on the opposite side of the front panel A1, and the switch D is provided with a mechanical switch mechanism (not shown) provided in the box-shaped interior A3 of the body A. A key (not shown) whose end is inserted into the through hole A2 and turns to operate the switch mechanism at a predetermined turning position.
And is formed. Since the through hole A2 is provided in the body A on the opposite side of the front panel A1, waterproof and dustproof properties between the front panel A1 and the box-shaped interior A3 of the body A are ensured.

Further, this is mounted on a control panel, and an external device such as a laser sensor is connected via a programmable controller or the like. To ensure safety. Then, for example, when it is used for factory automation for automating a food factory, it is washed with water, and at this time, it is washed by injecting water from the front panel A1 side which has waterproof and dustproof properties. Therefore, water does not enter the box-shaped interior A3 of the body A.

[0005]

In the above-mentioned conventional display device, the switch section D is provided on the body A on the opposite side of the front panel A1, so that erroneous operation of the operation section C can be prevented. Waterproofness and dustproofness between the box-shaped inside A3 can be secured.

However, since the switch section D is provided on the opposite side of the front panel A1, the door of the control panel must be opened to operate the switch section D.
Could not be operated quickly. Further, when the switch section D is provided on the front panel A1, water enters the box-shaped interior A3 of the body A from the through hole A2, and the switch section D is damaged or an electrical failure occurs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to secure the waterproofness and dustproofness between the front panel A1 and the box-shaped interior A3 of the body A, and to further improve the front face. It is an object of the present invention to provide a display device capable of quickly operating a switch unit from a panel side.

[0008]

Means for Solving the Problems In order to solve the above-mentioned problems, the device according to the first aspect is connected to a body formed substantially in a box shape and provided with a front panel, mounted on the front panel. A screen for displaying the operation status of the external device, an operation unit operated from the front panel to control the external device,
In a display device provided with a switch unit for preventing an erroneous operation of the operation unit, the switch unit includes a sensor unit disposed at a bottom of a recess provided on the front panel, and a base end inserted into the recess. And a key for operating the sensor unit.

According to a second aspect of the present invention, in the first aspect, the sensor section is a magnetic detecting element operated by a magnet provided at a base end of the key.

According to a third aspect of the present invention, in the first aspect, the sensor unit is a light emitting element that emits emitted light, and a light receiving element that receives the emitted light reflected by a base end surface of the key. And a device.

According to a fourth aspect of the present invention, in the first to third aspects, the key is inserted into the recess and pivots to operate the sensor at a predetermined rotational position, and to move the key at a predetermined rotational position. The key is provided with a slip-off preventing means for preventing the key from being removed from the recess at the rotation position.

According to a fifth aspect of the present invention, in the fourth aspect, the detachment preventing means is formed by a cutout groove which is engaged with a detachment prevention projection protruding from a concave side wall of the front panel. It has a configuration that has been done.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. In this apparatus, a laser sensor (not shown) as an external device is connected via a programmable controller (not shown).

Reference numeral 1 denotes a body, which is formed of an insulating resin into a substantially box shape having a box-shaped interior 1a, a square front panel 11 having an opening is provided on the front, and a screen section 12 is provided on the front panel. The operation state of the laser sensor attached to the opening 11 and connected thereto is displayed on a display screen. Here, a recess 13 which is cut out in a circular shape and has a bottom 13 a is provided in one of the four corners of the front panel 11, and the bottom 13 a
Separates the box-shaped interior 1a from the box-shaped outside to ensure waterproofness and dustproofness, and prevents the projection 13b from coming off.
Protruding from the side wall.

Reference numeral 2 denotes an operation unit which is formed by a screen switch provided on a display screen displayed on the screen unit 12 and is operated from the front panel 11 side to control the laser emission of the laser sensor via a programmable controller. I do.

A switch unit 3 includes a sensor unit 31 and a key 32 for operating the sensor unit 31.
An erroneous operation of the operation unit 2 is prevented. The sensor unit 31 is a magnetism detecting element 31a for detecting magnetism, and is disposed on the bottom 13a of the recess 13 provided on the front panel 11. The key 32 is made of resin and has a base end and a front end, and is formed in a rod shape with the base end side cut out along the longitudinal direction. It is formed on the same plane as the end face 32b, and a cutout groove 32c is provided on the base end side to form a slip-out preventing means. Then, the key 32 is inserted into the concave portion 13 of the body 1 and rotates to operate the sensor portion 31 at a predetermined rotational position, and the cutout groove 32c is locked to the detachment preventing protrusion 13b.

The operation of the above will be described. As shown in FIG. 3, when the key 32 is inserted into the recess 13 from the front panel 11 side and is turned to a predetermined turning position, the switch portion 3 is likewise turned by a magnet 32a provided at the base end portion for a predetermined time. The magnetic sensing element 31a rotates to the moving position and approaches without contact with the magnetic sensing element 31a which is the sensor unit 31 without contact.
Detects the magnetism of the magnet 32a and operates to bring the operation of the operation unit 2 into a permission state. At the same time, the key 32 is
c are mutually locked to the slip-off prevention projections 13b of the body 1,
The sensor unit 31 is not removed from the recess 13 while the sensor unit 31 is operated. Then, the operation unit 2 formed by the screen switch displayed on the screen unit 12 is operated to control the laser emission of the laser sensor via the programmable controller.

Next, as shown in FIG.
When the key 32 is turned from the predetermined turning position to the original turning position, the sensor unit 31 separates from the magnet 32a and moves to the magnet 32a.
The operation of the operation unit 2 is disabled by not detecting the magnetism of the operation unit 2 and the operation of the operation unit 2 is prohibited.

In the display of the first embodiment,
As described above, the switch unit 3 has the sensor unit 31 disposed on the bottom 13 a of the recess 13 provided on the front panel 11.
And a key 32 for operating the sensor unit 31, the key 32 is located in the recess 13 from the front panel 11 side.
And the sensor unit 31 is operated to move the front panel 11
The switch portion 3 can be quickly operated from the side, and the bottom portion 13a of the recess 13 separates the box-shaped interior 1a of the body 1 from the box-shaped exterior, so that the front panel 11 and the box-shaped interior 1a are waterproof and dustproof. Nature can be secured.

The sensor unit 31 is operated by a magnet 32a provided at the tip of the key 32.
1a, the magnetic detection element 31a can detect and operate the magnetism of the magnet 32a without contacting the key 32 without contacting the key 32, and can operate the sensor section 31 semi-permanently and reliably. By disposing the magnetic detecting element 31a having no movable portion at the bottom 13a of the recess 13, waterproofness and dustproofness between the front panel 11 and the box-shaped interior 1a can be easily secured.

Further, the key 32 is inserted into the recess 13 and turned to operate the sensor section 31 at a predetermined turning position, and a key preventing means is provided on the key 32 so that the recess 13 is provided at the predetermined turning position. Since the key 32 is prevented from being removed, the key 32 can be prevented from being removed while the switch unit 3 is operated, and the key 32 can be prevented from being lost.

Also, since a projection 13b is provided to project from the side wall of the recess 13 of the front panel 11, the escape prevention means is formed by a cutout groove 32c which is engaged with the projection 13b. Key means for preventing the switch 32 from operating.
Can be reliably prevented from being removed.

In the first embodiment, the slip-off preventing means is formed by the cutout groove 32c which is engaged with the slip-out preventing projection 13b. However, the slip-out preventing means may be formed by another configuration, and the present invention is not limited to this.

A second embodiment of the present invention will be described below with reference to FIGS. In the second embodiment, functions different from those in the first embodiment will be described, and members having substantially the same functions as those in the first embodiment will be denoted by the same reference numerals and description thereof will be omitted. In the second embodiment, the magnet 32a is not embedded at the base end of the key 32.

The switch section 3 includes a sensor section 31 and a key 32 for operating the sensor section 31 to prevent erroneous operation of the operation section 2. The sensor unit 31 includes a light emitting element 31b that emits emitted light and a base end surface 32b of the key 32.
And a light-receiving element 31c for receiving the emitted light reflected by the light-emitting device, and a transparent plate 31d is provided in the recess 13 to form a bottom 13a.

The light emitting element 31b and the light receiving element 31
c is the bottom 13a of the recess 13 so that the light projecting axes intersect each other.
And is disposed on one side with respect to the center line of the recess 13. Further, an arithmetic unit is provided in the box-shaped interior 1a of the body 1, and performs on / off control so as to operate according to the amount of emitted light received by the light receiving element 31c.

The operation of this embodiment will be described. As shown in FIG. 5, when the key 32 is inserted into the recess 13 from the front panel 11 side and is turned to a predetermined turning position, the light receiving element 31 c of the sensor unit 31 is turned to the base end of the key 32. End face 3
The emission light reflected by 2b is received through the transparent plate 31d,
The light emitting element 31b and the light receiving element 31c are located at the base end face 32b.
The operation unit 2 is operated in a non-contact manner without making contact with the operation unit 2 so that the operation of the operation unit 2 is permitted.

Next, as shown in FIG.
When the key 32 is rotated from the predetermined rotation position to the original rotation position, the base end surface 32b of the key 32 is
The emitted light projected from the light source is no longer reflected, and the light receiving element 3
1c does not receive the emitted light, becomes inactive, and the operation unit 2
Is prohibited, and even if the operation unit 2 is erroneously operated, the erroneous operation is prevented.

In the display of the second embodiment,
As described above, the sensor unit 31 is formed to include the light emitting element 31b that emits emitted light and the light receiving element 31c that receives the emitted light reflected by the base end surface 32b of the key 32. The element 31c receives the emission light reflected by the base end surface 32b of the key 32 rotated to the predetermined rotation position,
The sensor unit 31 can be operated semi-permanently and reliably without contact with the key 32 without contact, and the light projecting element 31b and the light receiving element 31c having no mechanical movable part can The waterproof and dustproof properties between the front panel 11 and the box-shaped interior 1a can be easily ensured by disposing it on the bottom 13a.

[0030]

According to the first aspect of the present invention, the switch portion is formed with the sensor portion provided at the bottom of the recess provided on the front panel and the key for operating the sensor portion. The key is inserted into the recess from the front panel side to operate the sensor part, and the switch part can be quickly operated from the front panel side, and the bottom of the recess separates the box-shaped inside and the box-shaped outside of the body. The waterproof and dustproof properties between the front panel and the inside of the box can be ensured.

According to a second aspect of the present invention, in addition to the effect of the first aspect, since the sensor section is a magnetic detecting element operated by a magnet provided at the tip of the key, the magnetic detecting element is formed of a key. The sensor can be operated semi-permanently and reliably by detecting and operating the magnetism without contact, without contact, and a magnetic detection element without mechanically movable parts is provided at the bottom of the recess. Thus, waterproofness and dustproofness between the front panel and the inside of the box can be easily ensured.

According to a third aspect of the present invention, in addition to the effect of the first aspect, the sensor unit includes a light emitting element for emitting the emitted light, and a light receiving element for receiving the emitted light reflected by the end face of the tip of the key. Since the light receiving element receives the emitted light reflected on the end face of the tip of the key turned to the predetermined turning position, the light receiving element operates without contact with the key,
The sensor unit can be operated semi-permanently and reliably, and a light-emitting element and a light-receiving element without mechanically movable parts are arranged at the bottom of the recess to provide waterproofness between the front panel and the box-shaped interior. Dustproofness can be easily ensured.

According to the fourth aspect, in addition to the effects of the first to third aspects, the key is inserted into the recess and pivots to operate the sensor at a predetermined pivot position and to remove the key. Since the prevention means is provided on the key to prevent the key from being removed from the recess at the predetermined rotation position, it is possible to prevent the key from being removed while the switch unit is operated and to prevent the key from being lost. it can.

According to a fifth aspect of the present invention, in addition to the effect of the fourth aspect, a notch is provided which is provided with a protrusion for preventing the protrusion from protruding from the side wall of the recess of the front panel, and wherein the means for preventing the protrusion is engaged with the protrusion. Since it is formed by the groove, the detachment preventing means can be formed with a simple configuration, and the key can be reliably prevented from being removed while the switch section is operated.

[Brief description of the drawings]

FIG. 1 is a perspective view of a switch unit according to a first embodiment of the present invention.

FIG. 2 is an overall perspective view of the same.

3 shows a state in which the key is inserted into a recess provided in the front panel to operate the sensor unit, and FIG.
It is the arrow view of the switch part seen from the direction.

FIG. 4 is an arrow view of the switch section viewed from the X direction in FIG. 1 when the key is inserted into a recess provided in the front panel and the sensor section is not operated.

FIG. 5 is a side sectional view of a switch unit in a state where a key according to a second embodiment of the present invention is inserted into a recess provided in a front panel to operate a sensor unit.

FIG. 6 is a side cross-sectional view of the switch unit in which the key is inserted into a recess provided in the front panel and the sensor unit is not operated.

FIG. 7 is an overall perspective view showing a conventional example viewed from the front.

FIG. 8 is an overall perspective view of the same as viewed from the back.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 11 Front panel 12 Screen part 13 Concavity 13a Bottom part 13b Protrusion prevention projection 2 Operation part 3 Switch part 31 Sensor part 31a Magnetic detection element 31b Light emitting element 31c Light receiving element 32 Key 32a Magnet 32b Base end face 32c Notch groove (Means to prevent slipping out)

Claims (5)

[Claims] 1. A body formed in a substantially box shape and provided with a front panel, a screen portion mounted on the front panel and displaying an operation status of an external device connected thereto, and an external device operated from the front panel side And a switch unit for preventing erroneous operation of the operation unit, wherein the switch unit is a sensor unit disposed at the bottom of a recess provided on the front panel, and a base end. A key for operating the sensor unit by inserting the unit into the recess. 2. The display according to claim 1, wherein the sensor unit is a magnetic detection element operated by a magnet provided at a base end of the key. 3. The sensor unit according to claim 2, wherein the sensor unit includes a light emitting element for emitting the emitted light, and a light receiving element for receiving the emitted light reflected on a base end surface of the key. The display according to claim 1. 4. The key is inserted into the recess and rotated to operate the sensor unit at a predetermined rotation position, and a key for preventing the key from being removed from the recess at the predetermined rotation position is provided. 4. The display according to claim 1, wherein the display is provided on the key. 5. The display device according to claim 4, wherein said detachment preventing means is formed by a notch groove which is engaged with a detachment prevention projection protruding from a recess side wall of said front panel. .