JP2817416B2 - Handheld terminal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handheld terminal for performing digital communication with a transmitter for detecting a physical quantity, converting the physical quantity into an electric signal, and transmitting the signal to a receiving instrument, and in particular, the operation of the handheld terminal. The present invention relates to a handheld terminal which is improved so as to have improved performance.

[0002]

2. Description of the Related Art FIG. 8 is a block diagram showing a configuration in which a hand-held terminal is connected to a two-wire transmission device. 1
A transmission device 0 converts a physical quantity such as a process variable into an electric signal and transmits the electric signal. DC power is supplied from a DC power supply 11 via a load 12 to which a receiving instrument is connected. The electric signal is transmitted as a current signal through the transmission lines L ₁ and L ₂ , and a change in voltage occurring across the load 12 is detected by a receiving instrument to know a process variable.

[0003] The current signal is converted into a unified current of 4 to 20 mA from the transmission device 10 set in a range corresponding to the pressure in the pipe, for example, and transmitted. In this case, for example, when it is desired to change or monitor the pressure range, it is convenient if it can be operated from outside the transmission device 10.

For this reason, the handheld terminal 13 is
Transmission line L₁, L_TwoConnecting line L_Three, L _FourUsing
Handheld terminal to the transmission device 10.
With a dedicated data communication function with the
Parameter change from the terminal 13 to the transmission device 10
And other digital data.

[0005] By the way, this handheld terminal 1
The appearance of 3 is formed as shown in FIG. This case
The casing 14 is formed in a rectangular shape as a whole, and a key switch section 15 and a display section 16 composed of liquid crystal or the like are provided on the surface thereof. Display unit 1 is selected to be large enough to hold
No. 6 is slightly larger than this and the display is formed so that it is easy to see.

The key switch unit 15 has a power key for turning on / off the power, a selection key for selecting a work mode,
Data input keys for inputting data are arranged. Necessary data is displayed on the display unit 16 in accordance with the key-in from the key switch unit 15, and a digital signal is transmitted to the transmission device 10, or the transmission device 10 corresponds to the digital signal. The data is input and displayed on the display unit 16.

When operating the handheld terminal 13, the user holds the case 14 with his left hand, and selects the necessary key of the key switch unit 15 with his right hand while following the display unit 16 with his eyes.

[0008]

However, in the conventional handheld terminal as described above, when operating the handheld terminal, both the right hand and the left hand are blocked, and the user operates the handheld terminal while operating the handheld terminal. There is inconvenience that cannot do another work.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a handheld terminal for performing digital communication with a transmitter which detects a physical quantity, converts the physical quantity into an electric signal and transmits the electric signal to a receiving instrument. , An internal unit containing a signal processing circuit for performing digital communication, a display unit for displaying the processing contents of the signal processing circuit, and a display selection key at a position corresponding to the display contents on the display unit. Key with-arranged
The switch and the internal unit are housed inside, and the front display unit and the key switch are arranged on the front surface. A grep groove for holding the hand-held terminal is formed on the back side of the key switch. The above-mentioned case is provided.

[0010]

[Operation] When operating the handheld terminal,
Insert the four fingers except the thumb into the grep groove for holding the handheld terminal formed on the back side of the key switch, hold the side of the case with the palm, and use the thumb for the key switch. Select a key and push. The key switch is configured such that a selection key for selecting display contents is arranged at a position corresponding to the display contents on the display unit.
It is easy to prevent key selection mistakes even if operated with one hand. In this way, the required key can be easily selected with one hand.
Another operation can be performed with the other hand while operating the switch.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a configuration of one embodiment of the present invention,
FIG. 2 is a longitudinal sectional view of the embodiment shown in FIG. FIG. 3 is an arrangement diagram showing an arrangement of the display unit of the embodiment shown in FIG.

Reference numeral 17 denotes a substantially rectangular case, on which a display section 18 is arranged, and a key switch 19 is arranged adjacent to the display section 18. And this case
The case 17 is divided into an upper case 17A and a lower case 17B, which are made of resin or the like. This case 17
The display unit 1 communicates with the transmission device 10 and the like inside the
8 is accommodated therein.

[0013] This is the electric circuit 20 is connected to the connection line L _3, L _4, the connecting line L _3, L ₄ the transmission apparatus 10
It is used to connect to the transmission device 10 or the like at the time of communication with the device. The case 1 is provided on the back surface of the case 17.
The grip 21 can hold the key 7 with one hand so as to correspond to the key switch 19 on the surface, and by forming an insertion groove 22 large enough to allow a finger of the hand to be inserted, the longitudinal direction of the key switch 19 can be improved. It is formed along the direction.

Display unit 18 arranged on the surface of case 17
And key switches 19 are arranged as shown in FIG. That is, the display element of the display unit 18 has 16 characters (A ₁ , A ₂ ,..., A ₁₆ ) arranged in the horizontal direction and (B ₁ , B ₂ ,..., B ₁₆ ), ( C ₁ , C ₂ , ...
, C ₁₆ ),..., (G ₁ , G ₂ ,..., G ₁₆ ) are arranged in seven rows.

On the other hand, a key switch 19 is a PWR key for turning on / off the power, a CLR key for clearing display contents,
ENT key for entering data, cursor movement key for moving a cursor arranged beside ENT key, +
/-Key, numeric keypad, etc. Unmarked keys arranged on the rightmost side and surrounded by double lines, 3
,..., +/- keys function as a selection key SK, and when these selection keys SK are pressed, the display element group (C) of the display unit 18 arranged right beside this selection key SK ₁ ,
_{C 2, ......, C 16)} , ......, (G 1, G 2, ......,
The content corresponding to the selected key SK is displayed in G ₁₆ ).

With the above arrangement, the four fingers except the thumb are inserted into the insertion grooves 22, the side of the grip 21 is pressed with the palm, the case 17 is held with one hand 23, and the thumb 24 is used as a key.
The switch 19 can be operated. In this case, FIG.
As shown in (2), when the selection switch SK is pressed, the corresponding content is displayed right beside the selection switch SK, so that a reading error is prevented.

Next, a specific operation will be described with reference to FIGS. First, the connection lines L ₃ and L ₄ shown in FIG. 1 are connected to the transmission device 10 or the transmission lines L ₁ and L ₂ .

Next, when the PWR key on the key switch 19 is pressed, large items A, B,..., E are displayed as shown in FIG. Major item A is display (DISPIAY), B is setting (SETTING)
, C are adjustment (ADJUST), D is test (TEST), and E is check / data (CHECK DATA).

Subsequently, when the numeric key "3" is pressed, the large item B of the display section 18 arranged right next to this, that is, the setting is selected, and the following display as shown in FIG. 5 appears. The display in FIG. 5 clearly indicates that the item is B on the first line, and the sub-items B10, B20,
B21, B22, and B23 are displayed. B10 is a tag number (TAG NO), B20 is a unit (UNIT), B21 is a maximum range (MAXRANGE), B22 is a minimum range (LOW RANGE), B2
3 indicates each item of a high range (HIGH RANGE).

Here, a necessary item is selected from these, and the corresponding key switch is pressed. For example, if the key switch "+/-" is pressed, the item B23 of the display unit 18 located immediately beside, that is, the high range is selected, and the next display as shown in FIG. 6 appears. The display in FIG. 6 indicates that the item B23 is selected on the first line, and the current value is displayed on the second line.

In this case, the key switch "+/-"
Simultaneously, a command for a data request corresponding to B23 is transmitted from the handheld terminal to the transmission device 10 and the current value is immediately returned from the transmission device 10 and displayed. The present value can be changed not only by display but also by using a numeric keypad.

In this case, a cursor appears on the left end of the second line. If it is desired to change the cursor to, for example, 1200 mmH ₂ O, enter 1, ₂ , 0, 0 with a numeric keypad and enter ENT.
By pressing the key, the value of the high range is changed to 12
At the same time, the corresponding data is transmitted to the transmission apparatus 10 and the content of the memory is 100 mmH ₂ O.
It is updated from 0 mmH ₂ O to 1200 mmH ₂ O. By repeating the above operations, parameters can be confirmed and set.

FIG. 7 is a longitudinal sectional view showing the structure of another embodiment of the present invention. In this case, unlike the configuration of the key switch 19, in order to prevent a mistake in pressing the key switch,
Steps 25 and 26 are provided for each row of keys, and a key switch 27 having a configuration in which a predetermined key can be selected with a thumb by blinds.

[0024]

As described above, according to the present invention, a grip unit integrated with a case of a handheld terminal is provided, and a display unit is provided on the surface side of the grip unit. Since the key switches are arranged so as to correspond to the display positions, the key switch can be selected with the thumb while holding the handheld terminal with one finger and four fingers excluding the thumb, and the other hand can be selected. Can perform another work, and workability is remarkably improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the configuration of one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a longitudinal section of the embodiment shown in FIG.

FIG. 3 is a layout diagram showing a configuration of a display unit and a key switch of the embodiment shown in FIG. 1;

FIG. 4 is a first explanatory diagram for explaining the operation of the embodiment shown in FIG. 1;

FIG. 5 is a second explanatory diagram for explaining the operation of the embodiment shown in FIG. 1;

FIG. 6 is a third explanatory diagram for explaining the operation of the embodiment shown in FIG. 1;

FIG. 7 is a longitudinal sectional view showing the configuration of another embodiment of the present invention.

FIG. 8 is a configuration diagram illustrating a function of a handheld terminal.

FIG. 9 is a perspective view showing an appearance of the handheld terminal shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Transmission apparatus 11 DC power supply 12 Load 13 Handheld terminal 15 Key switch part 16 Display part 17 Case 18 Display part 19, 27 Key switch 21 Grip 25, 26 Step difference

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields investigated (Int. Cl. ⁶ , DB name) H04L 29/12 G08C 19/00 H04B 1/034 H05K 5/00 Practical file (PATOLIS) Patent file (PATOLIS)

Claims (1)

(57) [Claims] 1. A hand-held terminal for performing digital communication with a transmitter for detecting a physical quantity, converting the physical quantity into an electric signal and transmitting the electric signal to a receiving instrument, wherein an inner unit containing a signal processing circuit for performing the digital communication is provided. A display unit for displaying the processing contents of the signal processing circuit, a key switch having a display selection key arranged at a position corresponding to the display contents on the display unit, and the internal unit housed therein. A handheld device comprising: a display unit; and a key switch disposed on a front surface thereof, and a case having a grep groove for holding the handheld terminal formed on a rear surface side of the key switch. Terminal.