JPH065153B2 - Door switch for refrigerator / freezer - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a door switch of a refrigerator-freezer.

2. Description of the Related Art In recent years, freezers and refrigerators have tended to be large-sized and have multiple rooms, and door switches are required to have a function of turning on and off a plurality of lighting bulbs and a fan motor for circulating cold air.

Hereinafter, the conventional door switch for a refrigerator and refrigerator as described above will be described with reference to the drawings. FIG. 5 shows the relationship between a light bulb of a conventional refrigerator-freezer and a fan motor door switch, 1 is a light bulb for illumination installed in a freezer compartment, 2 is a light bulb for illumination installed in a refrigerating compartment, 3 is a fan motor for forcibly circulating cold air in the freezer compartment and the refrigerator compartment, 4
Is a door switch for turning on and off the light bulb and the fan motor according to opening and closing of a door (not shown in the drawing).

Next, FIG. 6 shows the structure of the door switch 4. Reference numeral 5 is a case made of synthetic resin. 6a and 6a are operating rods projecting from the case 5 so that they can be retracted and retracted, and are operated by doors.

Reference numerals 7a and 7b denote springs for urging the operating rods 6a and 6b upward (in the projecting direction) in the drawing, and are mounted in the case 5. In the case 5, 8a and 8b are the operating rods 6a and 6b.
It is a steel ball attached to a recess 6c formed on the side wall of b. Reference numerals 9a and 9b are movable contact plates of the switches SW1 and SW2. Reference numeral 10 denotes a fixed contact plate corresponding to the movable contact plate 9a, which is connected to the electric bulb 1 shown in FIG. Reference numeral 11 denotes another fixed contact plate corresponding to the movable contact plate 9a, which is connected to the fan motor 3 shown in FIG. Reference numeral 12 denotes a fixed contact plate corresponding to the movable contact plate 9b, which is connected to the electric bulb 2 shown in FIG. 5 and also externally connected to the fixed contact plate 10. 13 is the movable contact plate 9b
It is an L-shaped terminal that is electrically connected to and held by a power source. Reference numeral 14 is a connection plate which forms a fixed contact 14a corresponding to the movable contact 9b at one end and is electrically connected to and held by the movable contact plate 9a at the other end.

The operation of the door switch for a refrigerator-freezer constructed as above will be described below.

First, the positions of the operating rods 6a and 6b in FIG. 6 show a state in which the doors of both chambers are open, and both operating rods 6a and 6b project from the case 5. In this state, the movable contact plate 9a is fixed to the fixed contact plate 10 and the movable contact plate 9b is fixed to the fixed contact plate 1.
2, the light bulbs 1 and 2 in FIG. 5 are turned on, and the fan motor is turned off. Next, when the door is closed and the operating rod 6b is pushed by the door, the movable contact plate 9b is rotated by the steel ball 8b using the contact portion of the terminal 13 as a hinge to contact the connection plate 14. As a result, the power supply circuit for the light bulb 2 is turned off. However, since the other movable contact plate 9b is in contact with the fixed contact plate 10, the fan motor 3 is turned off.
It remains FF. When the other door is closed, the operating rod 6
When a is pressed, the movable contact plate 9a is rotated by the steel ball 8a using the contact portion with the connection plate 14 as a hinge, contacts the fixed contact plate 11, and turns off the light bulb 1 and turns on the fan motor 3. . As a result, cold air is forcedly circulated to the freezer compartment and the refrigerator compartment. Further, when the operating rod 6a is projected and only the operating rod 6a is closed and the door is pushed, the movable contact plate 9a is rotated by the steel ball 8a using the contact portion with the connecting plate 14 as a hinge. Although it comes in contact with the fixed contact plate 11 apart from the fixed contact plate 10, it is connected to the fixed contact plate 12 externally, so that the light bulb 1 remains ON.

Problems to be Solved by the Invention In such a structure, as described above, the light bulb 1 does not turn off when only the operating rod 2a is pushed. Further, in order to turn on the fan motor, the fixed contact plate 11, the movable contact plate 9a, the connection plate 1
4, the movable contact plate 9b and the fixed contact plate 13 must be passed through, and there is a drawback in that the contact portion is increased and the contact resistance is increased.

In view of the above drawbacks, the present invention can turn on and off the light bulb and the fan motor in the two chambers independently, and
It is intended to provide a door switch for a refrigerator / freezer having a low contact resistance.

Means for Solving the Problems In order to solve the above problems, the door switch for a refrigerator / freezer of the present invention turns on and off the light bulbs in two chambers independently.
It is composed of two switches for F, an operating rod thereof, a switch for turning on and off the fan motor, and an operating piece that moves in a seesaw shape across the two switches to turn on and off the fan motor switch. There is.

Action With this configuration, the two switches for the light bulb operate independently by their respective operating rods, and the switch for the fan motor operates by the operating piece moving in a seesaw shape across the two switches. The switch for the fan motor is turned on only when both rods are pushed in, and the other condition, that is, when either one of the two operating rods is protruding or both are protruding, the fan is It will work to turn off the switch for the motor.

Embodiment One embodiment of the present invention will be described below with reference to the drawings.

In FIG. 4, reference numeral 15 is a case made of synthetic resin with its upper surface opened. Reference numeral 16 is a cover case that covers the opening on the upper surface side of the case, and is formed with flanges 17a having holes 17 for hooking at both ends, and the holes 17 are formed in the projecting portions 18 and 18 'on both sides of the case 15. It is fitted and fixed. Reference numerals 19a and 19b denote operating rods having one end formed into a cylindrical shape and the other end formed into a square pillar shape. The operating rods are inserted into the holes 20a and 20b formed in the front wall 15a of the case 15, and the case is formed. Protrusions 22a and 22b that enter the grooves 21a and 21b provided in the groove 15 are formed to slidably attach the operating rod. Reference numerals 23a and 24a denote springs for urging the operating rods 19a and 19b in a direction projecting from the case 15, respectively.
Hole 24 provided from the lower part of a, 19b toward the tip
It is fixed in the case 15 by walls 25a and 25b which are inserted into a and 24b and are provided in the cover case 16. 26a and 26b turn on and off the light bulb respectively
The contacts SW27a and SW27b are welded to one end of the movable plate of the switches SW3 and SW4, and the terminal is formed at the other end. A part of the terminal further has an L-shaped bent portion 28a, 2
8b, and groove portions 29a and 29 provided in the case 15
The bent portions 28a and 28b are fixed to b by sandwiching them,
The triangular protrusions 30 provided on the operating rods 19a and 19b.
It is switched by a and 30b.

In the state shown in FIG. 1, one operating rod 19a is inserted into the case 15, and the other operating rod 19b is attached to the case 1 by a spring 24a.
5 shows a state in which the movable plates 26a, 26a are projected to the outside.
b is normally moving in the opening direction.

Reference numeral 31 denotes a movable plate of the fan motor switch SW5, which has a tongue portion 32 formed by notching in the middle of a flat plate shape and a notch portion 33 parallel to the tongue portion 32, and on the extension line of the tongue portion 32. It has contacts 34. Reference numeral 35 denotes a substantially L-shaped terminal for holding the movable plate 31, which is composed of a terminal portion 36 and a pair of bent cut-and-raised portions 37 and 38, and the cut-and-raised portions 37 and 38 have V-shaped grooves. It has 39 and 40. The notches 3 of the movable plate 31 are formed in the grooves 39 and 40.
3 and the tip 32a of the notch forming the tongue 32 are fitted to each other, and the tip 32b of the tongue 32 is brought into contact with the groove 40 of the cut-and-raised portion 38 on the side opposite to the spring force thereof. Is held by. Reference numeral 42 is a holding spring for pushing the movable plate 31 to operate it, which is formed in a substantially L shape and has a V-groove-like protruding portion 43 formed at one end thereof, and an L portion near the center.
The bent portion 44 is formed by forming a letter-shaped notch 44a. The end portions of the terminal portion 36 of the terminal 35 and the pressing spring 42 are arranged so that the bent portion 44 pushes the acting portion 45 between the notch and the notch 33 which form the base portion 32 of the movable plate 31. 46 are inserted into the groove 47 of the case 15 and fixed. 48 is the switch S for the two light bulbs
It is a common fixed contact plate corresponding to the movable plates 26a and 26b of W3 and SW4 and the movable plate 31 of the fan motor switch SW5, and has three fixed contact portions 49, 50 and 51. The fixed contact 49 is attached to the movable contact 27a,
The fixed contact 50 is connected to the movable contact 27b and the fixed contact 51
, But is in contact with the movable contact 34, and the terminal portion 52 is inserted and fixed in the groove 53 of the case 15. 54 is a pair of protrusions 55a, 55 provided on the operating rods 19a, 19b straddling the two switches SW3, SW4 and the switch SW5 and having chevron portions facing each other.
b and 56a, 56b, the operating rod 19a,
It is an operating piece that moves like a seesaw according to the movement of 19b. The operating piece 54 has a protrusion 57 at the center, and the protrusion 57 is in contact with the protrusion 43 of the pressing spring 42.

The operation of the refrigerator / freezer door switch configured as described above will be described below.

In FIG. 1, the two bulb switches 26a and 26b can be independently turned on and off by the operating rods 19a and 19b. That is, the central fan motor switch SW5 is in a state (position C) in which the operating piece 54 is most pushed in as shown in FIG. 3, that is, the operating rod 19a,
Only when both 19b are pushed in, the contact between the projecting portion 57 and the projecting portion 43 is released and turned ON, and either operating rod 1
When 9a or 19b is projecting (position B) or when both operating rods 19a and 19b are projecting, the projecting portion 57 and the projecting portion 43 contact and press downward (position A) OFF
It will be.

As described above, according to this embodiment, the bulb is independently turned on and off.
In addition to FF, the fan motor can be turned off to prevent cold air from flowing out when either door is open, and the fan motor can be turned on only when both doors are closed. Moreover, the number of components is small, and the contact resistance can be reduced.

EFFECTS OF THE INVENTION As described above, according to the present invention, two switches for independently turning on and off the light bulbs provided in each of the two chambers, their operating rods, and a fan motor for forcibly sending air to the two chambers are provided. A switch for turning on and off, and an operating piece that is attached to the operating rod so as to be movable in a seesaw shape across the two switches and that turns on and off the switch for the fan motor. ON / OFF of the light bulb and fan motor according to the opening and closing of the room door
It can be turned off and its practical effect is great.

[Brief description of drawings]

FIG. 1 is a plan view of a refrigerator / freezer door switch according to an embodiment of the present invention with a cover case removed, FIG. 2 is an exploded perspective view of a fan motor switch portion of FIG. 1, and FIG. FIG. 4 is a cross-sectional view showing the assembled state, FIG. 4 is an exploded perspective view of the refrigerator / freezer door switch of FIG. 1, and FIG. 5 shows a relationship between a light bulb, a fan motor, and a door switch in a general refrigerator / freezer. A schematic front view and FIG. 6 are plan views of a conventional door switch for a refrigerator / freezer with a cover case removed. 15 ... Case, 16 ... Cover case, 19 ... Operating rod, 54 ... Operating piece, SW3, SW4 ... Switch, S
W5 ... switch.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Shown 54-177669 (JP, U) Shown 60-164730 (JP, U) Shown 48-44062 (JP, U) Shown 52- 121659 (JP, U) Actual public 44-13755 (JP, Y1) Actual public 53-13900 (JP, Y2)

Claims (1)

[Claims] 1. A switch for independently turning on and off a light bulb installed in each of two chambers, an operating rod thereof, and a fan motor for forcibly sending cool air to the two chambers.
A switch for turning N and OFF and a switch for turning on and off the fan motor are mounted so as to be movable in a seesaw shape by the operating rod across the two switches.
A door switch for a refrigerator / freezer consisting of an operating piece for FF.