JPH0621286U - Electronic device operation panel structure - Google Patents

Abstract

(57) [Abstract] [Purpose] The operation panel structure of an electronic device that can standardize the shape of a member having a complicated shape even when manufacturing a plurality of models and thereby reduce the manufacturing cost. I will provide a. [Structure] A board 15 on which a plurality of switches 42 are arranged is installed in a front opening of a casing 5, and a surface of the board 15 is formed to have substantially the same thickness as the above switches and each switch 42 is formed. A spacer 45 having a plurality of holes 46 accommodated therein is arranged. The surface of the panel body including the substrate 15 and the spacer 45 is covered with the protective sheet 3. A frame 2 is engaged with the casing 5, and a window 22 for exposing the central region of the protective sheet 3 is opened in the frame 2 and
A flange portion 21 is provided so as to sandwich the peripheral portion of the protective sheet 3 with the panel body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to various electronic devices such as electronic counters, timers, and temperature controllers, and more particularly to an operation panel structure in which operation switches and the like are arranged.

[0002]

[Prior art]

 In such an electronic device, a plurality of convex portions such as a display unit and operation switches are arranged on the front surface of the operation panel, and a plurality of holes for exposing these convex portions are formed on the front surface of the casing. It is formed. Further, a protective sheet for dustproofing and dripproofing is attached to the front surface of the casing.

[0003]

[Problems to be solved by the device]

 However, in the conventional operation panel, when manufacturing multiple models with different numbers and positions of operation switches, a complex-shaped casing with different numbers and positions of holes for exposing the operation switches was created for each model. Since it has to be manufactured, the number of molds for manufacturing the casing is increased, resulting in an increase in manufacturing cost. Further, in the conventional operation panel, since the protective sheet is only attached to the front surface of the casing, there is a problem that it is easily peeled off.

An object of the present invention is to produce a member having a complicated shape by making a member having a simple shape for each model even when manufacturing a plurality of models having different numbers and positions of operation switches. Is to provide a control panel structure for electronic devices that can standardize its shape, reduce manufacturing costs, and prevent the protective sheet from peeling off.

[0005]

[Means for solving the problem]

 In the operation panel structure of an electronic device according to the present invention, a board (15) having a plurality of convex portions such as operation switches formed on the surface is installed in the opening of the casing (5) having an opening on the front surface, A spacer (45) is formed on the surface of the substrate (15) to have substantially the same thickness as that of the protrusions, and a spacer (45) having a plurality of holes (46) for accommodating each protrusion is formed in each hole (46). ) Are arranged to accommodate the convex portions. The surface of the flat panel body composed of the substrate (15) and the spacer (45) is covered with a resin protective sheet (3). A frame (2) surrounding the casing opening is engaged with the casing (5), and a window (22) for exposing the central region of the protective sheet (3) is opened in the frame (2). In addition, a flange portion (21) surrounding the window (22) is provided so as to sandwich the peripheral portion of the protective sheet (3) with the panel body.

[0006]

[Action]

 A flat plate-shaped panel body is formed by placing the spacers (45) on the surface of the substrate (15) so as to cover the respective convex portions. Therefore, the protective sheet (3) covering the surface of the panel body can be formed in a planar manner in most of its area. When assembling the operation panel, the panel body is covered with the protective sheet (3), these are housed in the frame body (2), and the frame body (2) and the casing (5) are engaged with each other. .

As a result, the peripheral portion of the protective sheet (3) is sandwiched between the flange portion (21) of the frame body (2) and the outer peripheral portion of the panel body. The central area of the protective sheet (3) is exposed from the window (22) of the frame (2), and the operation switch can be pressed through the window (22).

[0008]

[Effect of device]

 According to the operation panel structure of an electronic device according to the present invention, even when a plurality of models having different numbers and positions of operation switches are manufactured, a spacer (45) having different numbers and positions of holes (46) is used as a model. If manufactured separately, the shapes of the casing (5) and the frame (2) can be standardized. The spacer (45) may have a simple shape by simply forming a hole in a flat plate, and since it is easy to manufacture this for each model, it is possible to reduce the manufacturing cost as a whole. Further, the protective sheet (3) is not easily peeled off because its peripheral portion is sandwiched between the flange portion (21) of the frame body (2) and the outer peripheral portion of the panel body.

[0009]

【Example】

 Hereinafter, an example in which the present invention is applied to an electronic counter will be described in detail with reference to the drawings. The electronic counter (1) is composed of a front unit (11) and a rear unit (12) as shown in FIG. 1, and the front unit (11) is provided with a digital display section (41) and an operation key (42). ing.

As shown in FIG. 2, a boss (52) consisting of a cylindrical first tubular portion (53) and a rectangular tubular second tubular portion (54) is provided on the back surface of the front unit (11) while protruding. On the front surface of the rear unit (12), as shown in FIG. 1, there is a boss accommodating chamber (61) consisting of a first tubular portion (62) and a second tubular portion (63) into which the boss (52) should be fitted. It is recessed.

As shown in FIG. 3, the front unit (11) and the rear unit (12) are arranged on both sides of the mounting board (13), and both units (11) and (12) are engaged with each other to form an integrated body. An electronic counter (1) is constructed.

As shown in FIG. 8, the front unit (11) is provided with a casing (5) having a front surface opened and a boss (52) protruding from the back portion. The casing (5) has a digital portion at the opening. A first circuit board (15) having a display control circuit is installed, and a second circuit board (16) having a CPU is housed inside the casing.

An LED panel (4) is attached to the upper half of the surface of the first circuit board (15). The LED panel (4) has a digital display part (41) of a plurality of digits, and thin flange parts (43) are formed on the upper and left and right peripheral parts.

As shown in FIG. 9, a plurality of tact switches 42 for setting a count value and the like are arranged on the lower half of the surface of the first circuit board 15. The tact switch (42) has substantially the same height as the LED panel (4). A spacer (45) having the same thickness as the LED panel (4) is installed on the lower half of the surface of the circuit board (15). A hole (46) for exposing each tact switch (42) is formed in the spacer (45), and a thin flange portion (47) similar to the LED panel (4) is formed in the peripheral portion. There is.

Therefore, in a state in which the spacer (45) is installed on the first circuit board (15), the surface of the LED panel (4) and the surface of the spacer (45) are flush with each other as shown in FIG. The flange portion (43) of the LED panel (4) and the flange portion (47) of the spacer (45) are continuous.

The surfaces of the LED panel (4) and the spacer (45) are covered with a urethane protective sheet (3) for drip-proof and dust-proof. The protective sheet (3) is provided with an eaves portion (31) on the periphery, which overlaps with the LED panel (4) and the flange portions (43) and (47) of the spacer (45), and is formed into a dish shape as a whole. There is. The protective sheet (3) may be embossed according to the shape of the pressing operation portion of the tact switch (42) slightly protruding from the surface of the spacer (45).

The front unit (11) further comprises a frame (2) to be engaged with the casing (5). A window (22) exposing the LED panel (4) and the tact switch (42) on the first circuit board (15) is formed in the frame body (2), and the eaves of the protective sheet (3) is formed. A flange portion (21) corresponding to the shape of the portion (31) is formed.

The casing (5) is provided with elastic hooks (59) projecting from a plurality of locations around the casing (5), while a plurality of elastic hooks (59) to be engaged with the inner surface of the frame (2). An engagement receiving piece (23) is formed. Therefore, the casing (5) and the frame body (2) are engaged with each other with the first circuit board (15) having the LED panel (4), the spacer (45), and the protective sheet (3) sandwiched therebetween. As a result, the front unit (11) is assembled as shown in FIG.

An annular packing (8) is fitted into the engaging portion between the outer peripheral surface of the casing (5) and the inner peripheral surface of the frame body (2).

In the front unit (11), the eaves portion (31) of the protective sheet (3) has the LED panel (4) in the frame body (2) and the flange portions (21) (47) of the spacer (45). ) And the flange portion (21) of the frame body (2), the protective sheet (3) does not come off.

Here, since the protective sheet (3) is substantially flush with the front surface of the flange portion (21) of the frame body (2), it is easy to cover the surface of the protective sheet (3) in every corner. It can be cleaned. Further, since the contact area of the protective sheet (3) with the LED panel (4) and the spacer (45) is large, the protective sheet (3) can be securely fixed when pasted.

As shown in FIGS. 2 and 4, the first cylinder portion (53) of the boss (52) of the front unit (11) has a pair of upper and lower cut grooves (57) (57) which should constitute a locking mechanism described later. ) Is recessed. Further, a protrusion (58) for preventing rotation is formed on the outer peripheral surface of the first tubular portion (53). Corresponding to this, an engagement receiving portion (not shown) with which the projecting piece (58) is to be engaged is recessed in the round hole of the mounting board.

As shown in FIGS. 2 and 7, a pair of left and right elastic arms (55) (55) are provided on the second tubular portion (54) so as to project toward the rear side of the main body (51). A stepped portion (56) having a plurality of steps is engraved outward at the tip of the elastic arm (55).

A third circuit board (17) is installed in the first tubular portion (53) and the second tubular portion (54), and the second tubular portion (17) is provided on the third circuit board (17). A female connector (50) for electrical connection with the rear unit (12) is installed in the opening on the 54) side.

On the other hand, in the casing (6) of the rear unit (12), as shown in FIG. 5, a fourth circuit board (18) having a power circuit is installed behind the boss accommodating chamber (61). A male connector (60) to be engaged with the female connector (50) is provided on the fourth circuit board (18).

A fifth circuit board (19) is installed in the casing (6) further rearward of the fourth circuit board (18), and the fifth circuit board (19) includes the casing (6). ) Is connected to a plurality of terminals (65) provided on the back. These terminals (65) are connected to a commercial power source or an external device.

A lock mechanism (7) is provided on the front surface of the casing (6) so as to surround the boss accommodating chamber (61) as shown in FIG. The lock mechanism (7) includes a pair of lock pieces (71) (71) arranged slidably in the vertical direction with the boss accommodating chamber (61) interposed therebetween, and a left and right slide with the boss accommodating chamber (61) interposed therebetween. It is equipped with a pair of control elements (73) (73) which are arranged as possible.

At the tip of each lock piece (71), there is formed a claw portion (72) to be fitted into the cut groove (57) formed in the first tubular portion (53) of the front unit (11). . Further, each lock piece (71) is urged toward the boss accommodating chamber (61) by a compression spring (75) interposed between the lock piece (71) and the casing (6).

On each operation piece (73), connecting arms (74) and (74) that are bifurcated and project toward the pair of lock pieces (71) and (71) are formed to be openable and closable. The tip of (74) is in contact with the lock piece (71).

Therefore, when the hands are released from the pair of operation pieces (73) (73), the pair of lock pieces (71) (71) are urged by the spring (75) and the boss accommodating chamber (61) side. The claw portion (72) moves into the boss storage chamber (61). Along with this, the pair of operation pieces (73) (73) move in the direction in which they are separated from each other, and the respective tip portions project from the side surface of the casing (6).

When the pair of operation pieces (73) (73) are pressed from both sides and moved to the boss accommodating chamber (61) side, they are pressed by the four connecting arms (74) and the pair of lock pieces ( 71) and (71) move in the direction away from the boss accommodating chamber (61) against the spring (75), and the claw portion (72) retreats from the boss accommodating chamber (61).

As shown in FIG. 6, in the process of engaging the front unit (11) with the rear unit (12), the pair of lock pieces (71) (71) of the lock mechanism (7) are The respective claws (72) are pushed open by the first tube portion (53) of the front unit (11) in a direction away from each other, and then the front unit (11) is completely fitted into the rear unit (12). At the same time, the pair of lock pieces (71) (71) move toward the first tube portion (53) by the spring bias, and the claw portions (72) fit into the cut grooves (57).

As a result, the front unit (11) and the rear unit (12) are locked to each other. Also, at this time, the female connector (50) of the front unit (11) and the male connector (60) of the rear unit (12) are engaged with each other to connect the third circuit board (17) and the fourth circuit board (18). Electrical connection is made.

When releasing the lock, the pair of operation pieces (73) (73) are pressed from both sides as described above. As a result, the claw portion (72) of the lock piece (71) is pulled out from the cut groove (57) of the first tubular portion (53).

As shown in FIG. 7, when the electronic counter (1) is mounted on the mounting board (13), the pair of elastic arms (55) are engaged in the process of engaging the front unit (11) and the rear unit (12) with each other. (55) is pressed inward by the opening edge of the mounting board (13) and elastically deforms, but elastically returns when the engagement is completed, and the stepped portion (56) opens the opening of the mounting board (13). Engage with the rim. As a result, the electronic counter (1) is securely fixed to the mounting board (13).

Here, even if there is some variation in the thickness of the mounting board (13), the elasticity of the elastic arms (55) (55) causes the stepped portion (56) and the opening edge of the mounting board (13). The engagement position is shifted and the variation is absorbed, and a reliable mounting state is always obtained regardless of the thickness of the mounting board (13).

When the electronic counter (1) is mounted on the mounting board (13) as shown in FIG. 7, the packing (8) provided on the front unit (11) is in close contact with the front surface of the mounting board (13). , A drip-proof structure will be constructed.

In the electronic counter (1), the mounting board (13) is provided with a round hole, and if necessary, a simple additional process for preventing rotation may be performed. Simple work with the general tools of

When mounting on the mounting board (13), the front unit (11) and the rear unit (12) arranged with the mounting board (13) in between need only be engaged with each other. The work is finished. At this time, no special fixing jig is required.

Since the second circuit board (16) mounted with the CPU is arranged in the front unit (11), a female connector (for electrically connecting the front unit (11) and the rear unit (12) ( It is possible to reduce the number of pins of 50) and male connector (60) as much as possible.

Further, in the structure of the front unit (11), even when a plurality of models with different positions and numbers of the tact switches (42) are manufactured, if only the spacer (45) is manufactured for each model, the frame The body (2) can have a common shape.

In this case, it is necessary to manufacture a plurality of types of spacers (45) having different positions and numbers of holes (46), but this is relatively easy and does not significantly affect the manufacturing cost. Rather, by standardizing the frame body (2), it becomes possible to commonly use dies having a complicated shape for manufacturing the frame body (2), which reduces the manufacturing cost.

The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the scope of the utility model registration request or reducing the scope. Further, the configuration of each part of the present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made within the technical scope described in the scope of claims for utility model registration.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a front unit and a rear unit of an electronic counter according to the present invention are disassembled.

FIG. 2 is a perspective view of the front unit as viewed from the back.

FIG. 3 is a side view of an electronic counter fixed to a mounting board.

FIG. 4 is a vertical sectional view of a front unit.

FIG. 5 is a vertical sectional view of a rear unit.

FIG. 6 is a vertical sectional view showing a state in which a front unit and a rear unit are engaged with each other.

FIG. 7 is a horizontal sectional view of the above.

FIG. 8 is an exploded perspective view of a front unit.

FIG. 9 is an exploded perspective view showing a state in which a spacer is removed from the first circuit board.

[Explanation of symbols]

 (11) Front unit (12) Rear unit (13) Mounting board (14) Round hole (2) Frame (21) Flange (22) Opening (3) Protective sheet (4) LED panel (45) Spacer (5) ) Casing (52) Boss (6) Casing (61) Boss chamber (7) Lock mechanism

Claims (1)

[Scope of utility model registration request] 1. A substrate (15) having a plurality of convex portions such as operation switches formed on the surface is installed in the opening of a casing (5) having an open front surface, and the surface of the substrate (15) is The spacer (45) is formed to have substantially the same thickness as the convex portion and has a plurality of holes (46) for accommodating the convex portions, respectively. Arranged, substrate (15) and spacer (45)
The surface of a flat plate-shaped panel body constituted by is covered with a protective sheet (3) made of resin, and the casing (5) is engaged with a frame body (2) surrounding the casing opening. A window (22) exposing a central region of the protective sheet (3) is opened in the body (2), and the window (22) is surrounded so that the peripheral portion of the protective sheet (3) serves as a panel body. An operation panel structure for an electronic device, characterized in that a flange portion (21) sandwiched between the projections is provided.