JPH01163589A - Refrigerator - Google Patents

Abstract

PURPOSE: To prevent erroneous function due to static electricity by providing a conductive spring member constituting an electric path between a partitioner and a thin plate extending through a cover plate in the direction of the partitioner without touching a control circuit board while abutting against the rear surface of the thin plate. CONSTITUTION: In the refrigerator door 4, a partitioner 26 is fixed to the rear surface of a front plate 17 and engaged together in the groove of a frame 20, lead wires 11 are pulled into a recess 25 from the partitioner 26, an earth wire 15 is connected to an appropriate point on the rear surface of the partitioner 26, and the space above the rear surface of the front plate 17 is filled with a foamed heat insulating material 22. After the lead wires 11 are connected with a control circuit board 12, a cover plate 30 is fixed to the front plate 7 and tightened to the partitioner 26 by inserting screws 40 into an extended part 39. A coil spring 41 is then inserted into the extended part 39 and a decoration plate 37 having a thin place 38 is pasted to the cover plate 30 from the front to the rear thus closing the extended part 39. Since an electric path is established between the thin plate 38 and the partitioner 26 and the thin plate 38 is earthed by the earth wire 15, erroneous function due to static electricity can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Industrial Application Field The present invention relates to a refrigerator having a control circuit board including switches and the like on the front surface of the door.

(b) Prior Art A conventional refrigerator of this type is disclosed in, for example, Japanese Patent Publication No. 44233/1983. In other words, the configuration shown there is to form a recess in the front of the door of the freezer compartment of the refrigerator, store the control circuit board there, and conceal this recess with a cover plate (operation panel). The switches, etc. on the board are exposed.

This allows you to easily set the temperature of the refrigerator from the front of the door.

(c) Problems to be Solved by the Invention When electrostatic noise enters such a circuit board, it becomes a cause of malfunction of the refrigerator. However, in winter, etc., the refrigerator user's body is easily charged with static electricity, and since the cover plate is usually made of a synthetic resin (insulator) with good moldability, it is easy to use your fingers when trying to operate the switch. If the switch is placed close to the switch, current (noise) due to static electricity will easily enter the circuit board through the switch surface. Therefore, in the past, a steel plate was installed near the switch on the back of the cover plate, and this was connected to the grounded outer box of the refrigerator with a lead wire, thereby allowing the static electricity from the switch to escape to the steel plate and preventing it from invading the circuit board. Was.

However, with this configuration, since the iron plate for dissipating static electricity is located in the recess, the static electricity from the switch does not go towards the iron plate but towards the circuit board located in the same recess, which does not provide sufficient noise countermeasures. was there. In particular, as the depth of the recesses has become shallower in recent years, there has been a problem that the iron plate and the circuit board are closer to each other and this tendency becomes stronger.

The present invention has been made to solve these problems.

(d) Means for Solving the Problems The present invention includes an insulating door that closes the opening of an insulating box, and a conductive partition plate that has a storage section inside that opens to the front of the door and prevents grounding. , a control circuit board disposed within the storage section;
A cover plate that hides the storage compartment and exposes operating parts such as switches from the control circuit board, a decorative plate that has a conductive thin plate on the back and is attached to the front of the cover plate, and a decorative plate that comes into contact with the back of the thin plate and exposes the control circuit board. The refrigerator is provided with a conductive spring member for forming an electric path between the thin plate extending in the direction of the partition plate and penetrating the cover plate without contacting the substrate and the partition plate.

(iv) Function According to the present invention, static electricity noise that enters from the operating section of the switch is discharged to the ground in the order of the thin plate, the spring member, and the partition plate. Furthermore, since the thin plate is located on the front surface of the cover plate, a distance between the thin plate and the control circuit board can be secured even if the storage area becomes shallow. Furthermore, even if the distance between the thin plate and the partition plate changes, the spring member can expand and contract to hold the electric circuit.

(f) Example The invention will now be described in detail with reference to the drawings.

FIG. 1 shows a perspective view of a refrigerator (1). (2) is a heat-insulating box body constructed by filling a heat insulating material (also not shown) between an outer box (3) made of steel plate and an inner box (not shown), and a freezer compartment and a refrigerator compartment (not shown) are formed inside. Also, (
4) and (5) are insulating doors that open and close the front openings of the freezer compartment and the refrigerator compartment, respectively. (6) is the outer box (3)
This is a pedestal for grounding attached to the bottom.

(7> is a control unit, which is configured, for example, at the front corner of the door (4). Fig. 2 is an enlarged view of this control unit (7), and Fig. 3 is an A-A in Fig. 2. The line cross-sectional view, Figure 4, is an enlarged view of Figure 3.The door (4) is located on the - side of the heat insulating box (2) and extends downward from the hinge member (8) made of thick-walled steel plate and its tip. The upper end side of the extending hinge shaft (9) is rotatably supported, and the hinge member (8) is attached to the outer box (
3) is screwed to the front end of the top surface. (10) is a lead wire extended from the equipment (not shown) inside the heat insulating box (2), and (11) is a lead connected to the control circuit board (12) described later in the control section (7). The lines pass through the inside of the insulated box (2) or the door (4), respectively.
In particular, the lead wire (11>) passes through the hinge shaft (9) and is drawn out onto the hinge member (8), where the connector (
13) Connected at (14). In addition, 15) is a lead wire for grounding (hereinafter referred to as the grounding wire), and one end is connected to the fourth
As shown in the figure, a metal conductive partition plate (26) will be described later.
It is attached to the back surface in a conductive relationship, passes through the hinge shaft (9), and the other end is fixed to the hinge member (8) with a screw (18). This allows the partition plate (26) to connect to the ground wire (
15), hinge member (8), outer box (3) and pedestal (6)
It will be grounded through the path. Then the hinge member (8)
will be hidden by the cover (19).

The door (4) has a synthetic resin frame 20) and an inner plate (21).
A heat insulating material (22) is foamed and filled between the front plate (17) and a metal front plate (17). An opening (24) is formed in the lower corner of the front panel (17), and a storage section opening toward the front that is recessed toward the heat insulating material (22) is provided on the back surface of the front panel (17) corresponding to this opening (24). The above-mentioned container-shaped metal partition plate (26) that has a recess (25) inside is attached.A groove (27) that opens inward is attached to the front opening edge of the frame body (20).
is formed, and the edge of the front plate (17) fits into this groove (27).
), but the frame (20) side portion of the flange (28) at the front end of the partition plate (26) is also inserted into the front plate (17).
) are inserted into the groove (27) in close contact with the back surface and are formed on the flange (28).
7) Positioned against the edge. Flange (2
The side of 8) that is not on the frame body (20> side) is sealed with a sealing tape (29) in contact with the back surface of the front plate (17>).

(30) is a synthetic resin cover plate for configuring the control unit (7), and the control circuit board (12) is screwed to the shaft (31) extending backward from the cover plate (30). The control circuit board (12) has a plurality of switches (3
2), (32) are attached, but the operation part at the tip <32A), (32A) is inserted into the through hole (30A) pre-formed in the cover plate (30) as shown in the enlarged view of Fig. 4.
), (30A> exposed to the front. Cover plate (3
At one end of the back edge of 0), there is an engaging claw (34) that protrudes backward.
is completely formed, and this is the front plate (17) opening (24)
The cover plate (30) engages with the engagement hole (35) formed in the edge.
) is fixed to the front plate (17), and in this state the control circuit board (12) is housed in the recess (25). Further, a hook portion (36) is formed at the other end of the back edge of the cover plate (30),
This engages the edge of the opening (24). (37) is a decorative plate made of synthetic resin, and has a conductive thin plate (38) made of aluminum foil on the back side. This plaque (37
) is pasted on the front of the cover plate (30) with glue and the operation part (3
2A) and (32A) are the respective through holes (37A>
, <38A>. In this state, the thin plate (38) is sandwiched between the cover plate (30) and the decorative plate (37).

A through hole (12A) is formed in the control circuit board (12), and the cover plate (30) in front of the hole is recessed and extends rearward, passing through the through hole (12A) and opening in the bottom wall thereof. An extending portion 39> (39A) extending to the partition plate (26) is formed in a protruding manner. The bottom wall (39A) of the metal conductive screw (39A)
40), the extension part (39) is screwed onto the partition plate (26) from the inside side. Further, (41) is a conductive coil spring made of metal stored in a slightly compressed state in the extension part (39), and one end is connected to a thin plate ( 38>, the other end is in contact with the head of the screw (40).

Next, the procedure for assembling the door (4) will be explained. First, attach the partition plate (26) to the back of the front plate (17), and connect both to the frame (
20) is engaged with the groove (27). Next, the lead wire (11) is drawn into the recess (25) from the partition plate (26), and
Connect the ground wire (15) to the appropriate place on the back side of the partition plate (26).

The lead wire (11) and the ground wire (15) are attached to the frame (20), and are pulled out of the frame (20) from a part of the hinge collar (not shown) into which the hinge shaft <9) can be fully inserted, and then, Inject the stock solution of the insulation material (22) onto the back surface of the front plate (17), bring the inner plate (21) into contact with the rear end of the frame (20), and foam-fill the insulation material (22) in the jig.Next The control circuit board (12) is attached to the shaft (31) in advance.
Prepare the cover plate (30) to which the cover plate (30) has been attached, and connect the lead wire (11) to the control circuit board (12).
0) and attach it to the front plate (17). Further, a screw (40) is inserted into the extending portion (39), passes through the bottom wall (39A), and is screwed into the partition plate (26). Next, insert the coil spring (41) into the extension part (39), attach the decorative plate (37) with the thin plate (38) on the back side from the front to the cover plate (30), and close the extension part 39). Close the room. Thereafter, the door (4) is attached to the heat insulating box (2).

In this state, an electric path is formed between the thin plate (38) and the partition plate (26) by the coil spring (41) and the screw (40), and the thin plate (38) is grounded to the earth by the ground wire (15). As a result, even if the user is electrically charged, the static electricity from the finger touching the operation part (32A) of the switch (32) will escape to the thin plate (38) near the operation part (32A>), and the coil spring (41), screw (40),
Partition plate (26), ground wire (15), hinge member (8),
It is discharged to the ground through the path of the outer box (3) and the pedestal (6) (there is no problem with the capacity as it is several thousand volts), and it does not flow into the control circuit board (12) side, resulting in malfunction of the control circuit. can be prevented. Furthermore, since the thin plate (38) is located on the front surface of the cover plate (30) and not within the recess (25), even if the depth of the recess (25) becomes shallow, the thin plate (38) and the control circuit board ( 1
2) distance can be secured, and malfunctions due to noise can be reliably prevented.

Furthermore, even if the distance between the thin plate (38) and the partition plate (26) changes somewhat due to assembly errors, this can be absorbed by the expansion and contraction of the coil spring (41), and the restoring force of the coil spring (41) ensures that they are in contact. , thin plate (38) and partition plate (
26) is secured, and assembly is also extremely easy.

(G) Effects of the Invention According to the present invention, static electricity that tends to flow into the control electric circuit of the refrigerator when a switch or the like is operated is discharged to the ground from a conductive thin plate located near the electric circuit through a spring member. This prevents malfunctions caused by static electricity in electric circuits. In particular, since the thin plate is located on the front side of the cover plate closest to the fingers, rather than inside the storage part, even if the depth of the storage part becomes shallow, the distance between the control circuit board and the thin plate can be secured, and reliable noise countermeasures can be taken.

Further, even if an error occurs in the distance between the thin plate and the partition plate, the expansion and contraction of the spring member ensures the formation of an electric path between the two.

[Brief explanation of the drawing]

Each figure shows an embodiment of the present invention. FIG. 1 is a perspective view of the refrigerator, FIG. 2 is an enlarged perspective view of the control unit, FIG. The figure is an enlarged view of FIG. 3. (1>...Refrigerator, (2)...Insulated box, (4)
)...Door, (12)...Control circuit board, (15
〉...Grounding wire, (25)...Recess, (26)・
...Division board, ri30)...Covering board, (32)...
Switch, ri37)...Palmet plate, (38)...
Thin plate, (41)...Coil spring.

Claims (1)

[Claims] 1. An insulating door that closes the opening of the insulating box, an electrically conductive partition plate that is grounded and forms a storage section that opens to the front of the door, and a control board that is disposed inside the storage section. a circuit board; a cover plate that hides the storage section and exposes operating parts such as switches from the control circuit board; a decorative plate having a conductive thin plate on the back side and attached to the front surface of the cover plate; a conductive spring member for forming an electrical path between the thin plate and the partition plate, which contacts the back surface of the thin plate and extends in the direction of the partition plate and penetrates the cover plate without contacting the control circuit board; A refrigerator that is equipped with.