JPH0228330Y2 - - Google Patents

Description

[Detailed explanation of the idea] (b) Industrial application fields The present invention relates to a cooking appliance with a side opening door.

(b) Prior art When a cooking appliance such as a microwave oven or a gas oven has a side-opening door, when the door is opened, the door naturally swings at an angle in the closing direction depending on how level the cooking appliance is installed. The phenomenon that occurred when I returned,
Or, when the door is opened forcefully, the reaction may cause the door to close again, but these situations are dangerous as the heated inner surface of the door may come into contact with the handler, and food, etc. There is also a problem in loading and unloading the cooker.

In order to solve this problem, it was proposed to provide a spring body on the hinge part of the door to temporarily hold the door in the fully open position, as disclosed in Japanese Utility Model Publication No. 57-60460. This requires an increase in the number of assembly operations, such as the need to secure screws.

(c) Purpose of the invention The present invention provides a simple structure for stably temporarily holding the door fully open.

(d) Structure of the invention The present invention provides a cooking device having a side-opening door with upper and lower pivots as pivot points, and a support board that protrudes from the main body of the cooking device toward the door, and a support board that is provided near the front end of the board. a rotation shaft that rotatably supports the door; a side wall portion of the door that rotates in the vicinity of the rotation shaft as the door rotates about the rotation shaft; a stopper pin provided on the support substrate and against which the side wall of the door comes into contact when the door is rotated and fully opened; and a spring member that is inserted through the rotation shaft and rotates integrally with the door; The spring member is pressed by the stopper pin and moves toward the rotation axis when the door is rotating to a position immediately before fully opening, and is pressed by the stopper pin when the door is removed from the position immediately before fully opening. It is characterized by having a peak that returns to its original state when the pressure is released and moves away from the rotation axis, and a valley that is adjacent to the peak and runs along the stopper pin when the door is fully opened.

(E) Embodiment FIG. 1 shows a microwave oven casing assembly as an embodiment. This microwave oven consists of a main body 2 including a heating chamber 1, and a door 3 which is rotatably supported by the main body and opens and closes an opening of the heating chamber 1. The heating chamber 1 is surrounded by a front plate 4, a cylindrical body 5, and a rear plate 6. The U-shaped exterior plate 7 contacts the flanges 8 of the front plate 4 and the rear plate 6, and thus further covers the left and right side walls and the upper wall of the heating chamber 1 while maintaining space. The exterior bottom plate 9 covers the outside of the bottom wall of the heating chamber 1 while still maintaining space.

A bracket 10 is fixed to the outer shoulder of the upper wall of the heating chamber 1, and a first support substrate 11 fixed to the bracket protrudes from the front plate 4 toward the door side through a long hole 15 bored in the upper corner of the front plate 4. There is. A first rotation shaft 1 vertically provided at the tip of the first support substrate 11
6 is inserted into the upper edge of the door 3 through a washer 17, which constitutes an upper pivot point that serves as a pivot point for the side-opening door 3.

The second support board 19 screwed from below the bottom plate through the holes 18, 18 in the bottom plate 9 rises upward on the bottom plate 9, and then becomes horizontal again.
It protrudes from the front plate 4 toward the door through a long hole 20 bored in the lower corner of the front plate 4, and furthermore, the vicinity of its tip enters into the door 3 through a hole formed in the inner surface panel of the door 3. Near the tip of the second support board 19, a second rotation shaft 21 and a stopper pin 22 are vertically disposed upward, and these constitute a lower pivot point that serves as a rotation fulcrum for the side-opening door 3. The structure of the lower pivot is a feature of this embodiment and will be described in detail later.

A door latch 23 protruding from the inner surface panel on the free end side of the door 3 with the above-mentioned upper and lower pivot points as rotation fulcrums,
24 enters into the main body 2 through holes 25 and 26 provided correspondingly in the front plate 4 when the door 3 is closed, and latches the door in the closed state. This latch is released by pulling the door handle 27 forcefully toward you.

Figure 2 shows details of the lower pivot. Incidentally, FIG. 2A shows the interior of the door 3 in the closed state with the inner panel removed. The receiving fittings 30 are integrally connected by a beam 31 and are spaced 90 degrees apart from each other.
First and second fixing surfaces 32 and 33 in a horizontal plane arrangement
These fixing surfaces are fixed to the inner surface of the left side wall 3a of the door (as viewed from the front of the door) and the inner surface of the lower side wall 3b, respectively. The second rotation shaft 21 is inserted into the hole of the ear portion 32a provided upright on the first fixed surface 32,
A Teflon washer 34 and a spring member 35 are coaxially disposed between the ear portion and the second support substrate 19. Therefore, the second rotation shaft 21 and the ear portion 32a rotatably support the door 3 as a hinge mechanism.

When the door 3 is opened from the closed state, the first fixing surface 32 of the receiving metal fitting 30 rotates around the second pivot shaft 21, and eventually, as shown in FIG. The first fixing surface 32 comes into contact, and the door is in a fully open state. In this case, the first fixing surface 32 is fixed to the inner surface of the door side wall 3a and corresponds to the door side wall portion. Notches 36 and 37 provided in the left side wall 3a of the door and the second support substrate 19, respectively, allow the left side wall 3a of the door to remain in the second support substrate 19 at least until the door is fully opened.
prevent collisions.

The spring member 35 is connected to the insertion hole 40 of the second rotation shaft 21.
The horizontal part 41 has a horizontal part 41, and the bent part 42 stands up from the horizontal part. One right side 4 of the horizontal part 41
1a is on the inner surface of the front wall 3c of the door, and on the other right side 4
1b is in contact with the inner surface of the left side wall 3a of the door, and the bent portion 42 is in contact with the side edge 32 of the first fixing surface 32.
b (FIG. 3), so that the spring member 35 rotates integrally with the opening operation of the door 3.

The spring member 35 further stands up from the other right side 41c, and generally connects the second rotation shaft 21 and the stopper pin 2.
2, the spring piece 43 is provided with a spring piece 43 that extends freely in the circumferential direction of the second rotation shaft 21, and the spring piece 43 has a spring piece 43 that extends in a free state in the circumferential direction of the second rotation shaft 21. It includes a peak 43a protruding from the top and a valley 43b located adjacent to the top end thereof.

Therefore, when the door 3 approaches the fully open state and rotates to a position immediately before fully opening, the peak 43a of the spring piece 43 is pressed by the stopper pin 22 and moves toward the second rotation shaft 21. Then, when the door 3 further rotates in the opening direction, moves away from the position just before fully opening, and fully opens, the crest 43a is released from the pressure by the stopper pin 22 and returns to its original state of moving away from the second rotation shaft 21. The valley 43b comes to align with the stopper pin 22. In this way door 3
When the door is fully opened, the spring piece 43 elastically engages with the stopper pin 22 due to the action of the peaks 43a and valleys 43b, and the door 3 is held at that position.
is temporarily held. That is, the door 3 is stably held in the fully open state unless an external force of a certain degree or more in the closing direction is applied to the door 3.

When a certain amount of external force is applied to the door 3 in the closing direction in order to close the door 3, the door 3 rotates from the fully open state to a position immediately before fully opening, and then further rotates in the closing direction. At this time, when the door 3 rotates to the position immediately before fully opening, the peak 43a of the spring piece 43 is again pressed by the stopper pin 22 and moves toward the second rotation axis 21, and when the door 3 further rotates in the closing direction, mountain 43a
returns to its original state, thereby releasing the temporary holding.

As a modification of the above embodiment, the upper pivot can also be configured similarly to the lower pivot, and in that case, the stopper pin 22 and the spring member 43 may be removed from the upper pivot. Furthermore, the second rotation axis 2
1 may be provided on the ear portion 32a, and a hole through which it is inserted may be provided on the second support substrate 19 side.

(F) Effect of the invention According to the invention, the structure for stably temporarily holding the door in the fully open state uses a stopper pin that restricts the fully open state of the door, and a spring member that elastically engages with the stopper pin. Since the spring body is simply inserted through the pivot shaft of the hinge mechanism, the assembly work is greatly simplified, unlike the conventional method of fixing the spring body with screws.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention; FIG. 1 is an exploded perspective view, FIG. 2A is a perspective view of the main part, FIG. 2B is an exploded perspective view of the main part, and FIG. 3 is a plan view showing the door fully open. be. 3... Door, 19... Second support board, 21...
Second rotation axis, 22... Stopper pin, 35...
Spring member.

Claims (1)

[Scope of utility model registration request] In a cooker having a side-opening door with upper and lower pivot points as pivot points, a support board protrudes from the cooker body toward the door, and a support board provided near the front end of the board to rotatably support the door. A rotation axis to
A side wall portion of the door and the supporting substrate rotate around the rotation axis as the door rotates about the rotation axis, and the door rotates fully open. The door includes a stopper pin that the side wall of the door comes into contact with when the door side wall is in contact with the door, and a spring member that is inserted through the rotation shaft and rotates integrally with the door, and the spring member rotates to a position immediately before the door is fully opened. When the door is opened, the door is pressed by the stopper pin and moves toward the rotation axis, and when the door is removed from the position just before fully opening, the pressure by the stopper pin is released and the door returns to its original state of moving away from the rotation axis. A cooking appliance characterized in that it has a ridge portion that extends along the stopper pin when the door is fully opened, and a trough portion adjacent to the ridge portion that extends along the stopper pin when the door is fully opened.