JP2003037370A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a display cover against damage when a display unit is mounted on a front cover or lead wires are connected to the terminals of a rear case. SOLUTION: An electronic apparatus is equipped with a rear case 1 housing a control unit and a front case 2 arranged at the front face 1a of the rear case 1 and housing a display unit 20. The display cover 6 of the display unit 20 is arranged at the front face 2a of the front case 2, and projections 10 are provided to the display surface peripheral part 6a of the display cover 6 at the front face 2a. When the electronic apparatus is mounted so as to make the front face 2a of the front case 2 confront a mounting unit 41, the projections 10 bear against the mounting unit 41 to form a gap between the display surface 8 of the display cover 6 and the mounting unit 41. As a result, the display surface 8 of the display cover 6 is restrained from rubbing against the mounting unit 41 and hardly damaged when the display unit 20 is housed in the front case 2, or lead wires are connected to terminals 3 arranged on the rear surface 1b of the rear case 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device such as a timer, a counter or a digital panel meter.

[0002]

2. Description of the Related Art Conventionally, an electronic device of this type has a rear case which is a control unit housing case which houses a control unit and a front which is a display unit housing case which is arranged on the front surface of the rear case and houses a display unit. It is configured with a case.

The front case is constructed by disposing a display cover for covering the display of the display unit on the upper front part and a rubber switch push button for transmitting a switch signal to the control unit on the lower front part. is doing.

The display cover is usually made of transparent or translucent plastic such as ABS and has a glossy surface so that the characters displayed on the display can be clearly seen. ing.

In order to accommodate the rubber switch and the display unit in the front case to which the display cover is attached in advance, the front side of the front case is placed in contact with a mounting portion such as a workbench. First, the rubber switch and the display unit are housed in the front case with the front part of the display cover placed on the mounting part, and then the front case is attached to the front part of the rear case.

The electronic device thus completed is
The lead wire is attached to the terminal of the control unit projectingly arranged on the rear surface of the rear case in a state where the display cover is again placed in contact with a mounting portion such as a workbench.

[0007]

Therefore, in the above-mentioned conventional electronic equipment, when the display unit is set in the front case, the display cover is already attached to the front case and the display cover is not installed. The display unit is to be accommodated and mounted in the front case in a state of being in contact with the mounting portion, and at this time, the display cover may come into contact with the mounting portion and be damaged.

Also, when the lead wire is attached to the terminal projectingly arranged on the upper surface of the rear case, the lead wire is attached to the terminal by using a screw or the like while the display cover is in contact with the mounting portion. In this case also, the display cover may come into contact with the mounting portion and be damaged.

Once the display cover has been damaged as described above, the display characters sent from the display unit become difficult to see, and it serves as an electronic device such as a timer, counter or digital panel meter. Cannot be fulfilled, and it cannot be made into a product.

Therefore, the present invention has been devised in view of the above point, and when the display unit is accommodated in the display unit accommodating case, or when the terminals protruding from the rear surface of the control unit accommodating case are disposed. An object of the present invention is to provide an electronic device such as a timer, a counter, or a digital panel meter, which is devised so that the display cover is not damaged by a mounting part such as a work table when the lead wire is attached.

[0011]

In order to achieve the above object, the present invention has a display unit cover arranged on the front surface of a display unit housing case, and a plurality of display unit covers are provided around the display surface outside of the display unit cover. When the projection is formed and the front surface of the display unit accommodating case is placed facing the mounting part such as a work table, the projection comes into contact with the mounting part so that the display surface of the display cover is mounted on the mounting part. It is characterized in that it is configured to form a gap with respect to.

According to the present invention, when the front portion of the display unit housing case is placed in a state of facing the placing portion,
A plurality of protrusions formed on the periphery of the outside of the display surface of the display cover directly abuts on the mounting portion, so that the display surface of the display cover can be lifted above the mounting portion with a gap. When the work of accommodating and mounting the display unit in the display unit accommodating case is performed, the display surface of the display unit cover is not damaged by being rubbed by the mounting unit, and the quality of the product can be improved.

Further, according to the present invention, a push button is provided below the display cover on the front surface of the front case, and the push button constitutes a part of the protrusion. It is possible to make the design of the display cover and the front portion of the electronic device clean by reducing the number of protrusions provided on the display unit as much as possible.

Further, the present invention is characterized in that the display unit accommodating case is built in the control unit accommodating case accommodating the control unit, and the front surface portion of the display unit accommodating case faces the mounting portion. When mounted in a state in which the display surface of the display unit cover is directly contacted with the plurality of protrusions formed on the peripheral portion of the display surface outside the display surface, the display surface of the display unit cover is spaced from the mounting portion with a gap. Can be raised,
In this state, when a lead wire or the like is attached to the terminal protrudingly arranged on the rear surface of the control unit accommodating case, the display surface of the display cover is not scratched by being rubbed by the mounting portion, and the quality of the product You can improve.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a digital panel meter, which is an electronic device adopting the first embodiment of the present invention, drawn from the front side, and FIG. 2 is an exploded perspective view showing the front case side of FIG. 3 is an explanatory view showing a state in which the front side of the electronic device in FIG. 1 is placed opposite to the placing portion.

1 and 2, a digital panel meter as an electronic device according to the present invention has a rear case 1 and a front case 2.

The rear case 1 has a box-like shape with its front surface 1a and rear surface 1b open, and constitutes a control unit housing case for housing a control unit (not shown).

On the rear surface 1b of the rear case 1, the terminal group 3 of the control unit is arranged so as to project.

The front case 2 is a display unit 20.
And a display unit accommodating case for accommodating the.

That is, the rear surface portion 2b of the front case 2
A frame-shaped accommodating portion 4 is formed in the container, and by partitioning the accommodating portion 4 by the partition wall 5, the upper part of the accommodating portion 4 becomes a display unit accommodating portion 4a for accommodating the display unit 20,
A switch accommodating portion 4b whose lower part accommodates the rubber switch 30
Is also configured.

A concave portion 2c is formed in an upper portion of the front surface of the front case 2, and the indicator unit 2 is formed in the concave portion 2c.
A display cover 6 for covering the display unit 21 of 0 (described later)
Is installed.

The display cover 6 is made of a transparent or semi-transparent plastic such as ABS having a substantially rectangular shape, and its surface has a gloss finish.

The substantially central portion of the display cover 6 has a display character 7 sent from the display 21 of the display unit 20.
Is a display surface 8 that is transparently projected, and small projections 10 are formed at the four corners of the outer peripheral portion 6a of the display surface.

As shown in FIG. 2, the display unit 20 has a display section 21 composed of a liquid crystal display, a diffusion sheet 22, a reflection plate 23, a rubber connector 24 attached to the reflection plate 23, or a wiring board 25. Then configured.

The rubber switch 30 has a plurality of push buttons 31 arranged therein, and is configured to transmit a switch signal to the control unit housed on the rear case 1 side by the operation of the push buttons 31.

Display unit 20 and rubber switch 3
0 is to be accommodated in the accommodation portion 4 of the front case 2, but in this accommodation, the concave portion 2c is previously prepared.
The display cover 6 is attached to the.

Next, as shown in FIG. 2, the front case 2 is placed with the front surface 2a side facing a placing portion (not shown), and the display is displayed in the display unit accommodating portion 4a. The display 21 and the diffusion sheet 2 are sequentially provided on the rear surface of the cover 6
2 is inserted and accommodated.

Further, in the switch accommodating portion 4b, the push button 3
The rubber switch 30 is accommodated in a state in which 1 projects from the front surface portion 2 a of the front case 2.

Next, the reflection plate 23 is arranged on the diffusion sheet 22 and the rubber switch 30, and the wiring board 25 is placed on the reflection plate 23.

At this time, the engaging projection 25a formed on the wiring board 25 is engaged with the engaging portion 4c provided on the housing portion 4, whereby the display unit 20 and the rubber switch 30 are provided.
Are fixedly accommodated in the accommodation unit 4.

As a result, the display section 21 is electrically connected to the wiring board 25 through the rubber connector 24, and the rubber switch 30 penetrates the reflection plate 23 and is electrically connected to the wiring board 25. become.

When housing the display unit 20 and the rubber switch 30 in the front case 2 as described above,
The projections 10 provided at the four corners of the display surface outer peripheral portion 6a of the display cover 6 come into contact with the mounting portion, and the display surface 8 can be lifted from the mounting portion.
It is possible to prevent the display surface 8 from being damaged by the mounting portion during the operation of the 0 or the rubber switch 30 in the front case 2.

The front case 2 housing the display unit 20 and the rubber switch 30 in this way is
Along with the waterproof packing 40, a plurality of engaging claws 9 inserted into the front opening side of the rear case 1 and formed in the accommodating portion 4 are formed in the side wall portion 1c of the rear case 1 in the engaging holes 1d.
By engaging with the front case portion 1a of the rear case 2, the wiring board 25 and the control unit housed in the rear case 1 are electrically connected, and the digital panel meter shown in FIG. The electronic device is completed.

To mount a lead wire (not shown) on the terminal group 3 projectingly arranged on the rear surface 1b of the rear case 1 by using a screw or the like in the thus completed electronic device,
As shown in FIG. 2, the front case 2 is placed with the front face portion 2a facing the placing portion 41. At this time, the display surface outer peripheral portion 6 of the display portion cover 6 is placed.
The projections 10 respectively provided at the four corners of a can contact the mounting portion 41 to lift the display surface 8 from the mounting portion 41, so that the mounting of the lead wire or the like on the terminal group 3 can be prevented. The portion 41 can prevent the display surface 8 from being damaged.

FIGS. 4 to 7 show another embodiment of the projection 10 of the present invention. When the projection 10 is formed on the display cover 6 provided on the upper portion of the front surface 1a of the front case 2, FIG. In the above, since two small protrusions 10 are arranged at both upper corners of the display surface outer peripheral portion 6a of the display cover 6, the push button 31 is displayed in view of the fact that the push button 31 is made of rubber. It is used as the protrusion 10 arranged on the lower side of the out-of-plane peripheral portion 6a.

The protrusion 10 shown in FIG. 5 is a peripheral portion 6 outside the display surface.
It is formed as strip-shaped protrusions on both upper and lower sides of a.

The protrusion 10 shown in FIG. 6 is a peripheral portion 6 outside the display surface.
It is formed as a strip-shaped projection on both left and right sides of a.

The protrusion 10 shown in FIG. 7 corresponds to the protrusion 1 shown in FIG.
In the modified example of 0, it is formed in a hook shape.

It goes without saying that the projections 10 shown in FIGS. 4 to 7 all exhibit the same effects as the projections 10 shown in FIGS. 1 to 3 in the first embodiment.

[0041]

As described above, according to the present invention,
When the front part of the display unit housing case is placed with the front part facing the mounting part, a plurality of protrusions formed on the outer periphery of the display surface of the display cover directly contact the mounting part to display the display. The display surface of the unit cover can be lifted up above the mounting part with a gap, and in this state, work to store and mount the display unit in the display unit housing case or place it on the rear surface of the control unit housing case It is possible to improve the quality of the product without damaging the display surface of the display cover when the display cover is rubbed by the mounting portion when the lead wire is attached to the formed terminal.

[Brief description of drawings]

FIG. 1 is a perspective view of a digital panel meter, which is an electronic device adopting a first embodiment of the present invention, drawn from the front side.

FIG. 2 is an exploded perspective view showing the front case side in FIG.

FIG. 3 is an explanatory diagram showing a state in which the electronic device in FIG. 1 is placed with its front side facing a placing portion.

FIG. 4 is a front view of a front case of a digital panel which is an electronic device adopting a second embodiment of the present invention.

FIG. 5 is a front view of a front case of a digital panel which is an electronic device adopting a third embodiment of the present invention.

FIG. 6 is a front view of a front case of a digital panel which is an electronic device adopting a fourth embodiment of the present invention.

FIG. 7 is a front view of a front case of a digital panel which is an electronic device adopting a fifth embodiment of the present invention.

[Explanation of symbols]

1 Rear case (control unit housing case) 2 Front case (Display unit housing case) 2a front part 3 terminal group (terminal) 6 Display cover 6a Peripheral area outside the display surface 8 Display surface 10 protrusions

Claims (3)

[Claims] 1. An electronic device comprising a display unit cover arranged on a front surface of a display unit housing case, wherein a plurality of protrusions are formed on a peripheral portion of the display unit cover outside the display surface. When the front surface of the container unit accommodating case is placed so as to face a mounting portion such as a workbench, the projection abuts on the mounting portion so that the display surface of the display cover covers the mounting portion. An electronic device characterized by being configured to form a gap. 2. The electronic device according to claim 1, wherein a push button is provided so as to protrude below the display cover on the front surface of the display unit housing case, and the push button constitutes a part of the protrusion. machine. 3. The electronic device according to claim 1, wherein the display unit accommodating case is built in a control unit accommodating case accommodating a control unit.