JPH058914Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Application of the Invention) This invention relates to a lid opening/closing device particularly suitable for use in an electronic jar rice cooker.

(Background technology) In electronic jar rice cookers, when the lid is removed from the locking device, the lid opens automatically, and the lid is biased in the opening direction to prevent it from falling and pinching your hand. A lid opening/closing device that incorporates a coil spring for opening and closing the door is known. In this conventionally known device, steam, broth, moisture condensed on the lid, and water from washing the rice cooker itself easily enter the spring case, which is not only unsanitary but also corrodes the coil spring. There was a problem.

(Technical Issues) The technical issues with this invention are that the lid can be opened automatically to a predetermined opening angle like conventionally known ones, and the spring case has the function of preventing the lid from falling by itself. We aim to provide a lid opening/closing device that is devised to prevent moisture from entering.

(Technical means) In order to achieve the above-mentioned technical problem, this invention has a rotating shaft mounted on a spring case that houses a slider and a coil spring that urges the slider to slide in one direction. The lever rotation shaft restricts upward sliding of the slider, and the rotation shaft is provided with a cam portion, and the cam portion rotates a part of the slider and the rotation shaft in a predetermined manner. The upper part of the spring case is covered to prevent moisture from entering the inside of the spring case, so that the entire spring case has a sealed structure, and the rotation axis is Only the end of the shaft is made to protrude from the spring case, and one end of the lid is attached to this protruded part.

(Example) This invention will be described in detail below based on an example shown in the drawings. In FIG. 1, 1 is, for example, a rice cooker main body, and 2 is a lid thereof. One side of the lid 2 is attached to the top of one side of the rice cooker body 1 via a lid opening/closing device A so that it can be opened and closed, and the opposite side to the side attached to the lid opening/closing device A is locked. It is locked to the rice cooker main body 1 via device B.

First, to explain the lid opening/closing device A, as shown in FIG. The spring cases 3, 3 accommodate the mounting insertion portions 3a, 3a, and rotating shafts 4, 4 are rotatably mounted inside and above the spring cases 3, 3. The side plates 3b, 3 of the spring cases 3, 3 of the rotating shafts 4, 4
Attachment portions 2a, 2a of the lid 2 are attached to the portions protruding from b via connectors 6, 6.
In the embodiment, the spring cases 3, 3 are a pair, but the internal structure is the same except that the left and right sides are reversed, and even one side of the lid 2 can be attached to both ends of the rotating shaft 4. Since the object of the cigarette invention has been achieved, only this one piece and the correspondingly provided other parts will be described in more detail.

The spring case 3 has an outer shell portion 3 that covers the periphery thereof.
e, side plates 3b provided on both sides of this outer shell portion 3e,
9, it has a sealed structure unlike the conventional one, and a spring housing part 3c and a rotating shaft housing part 3d are provided inside thereof in communication with each other in the vertical direction.
A slider 7 is housed in the spring housing part 3c so as to be slidable in the vertical direction, and a compression coil spring 8 is resiliently installed between the slider 7 and the inner bottom of the spring housing part 3c. This compression coil spring 8 is connected to the spring case 3
When there is only one, the two have the elasticity to automatically push open the lid 2, and when there are two as in the embodiment, the two have the elasticity to automatically push open the lid 2. A rotating shaft 4 that also serves as a hinge pin is attached to the outer shell portion 3 of the spring case 3 in the rotating shaft housing portion 3d.
The shaft is mounted between the bearing holes 3f and 9a provided in the side plate 3b, which is provided integrally with the outer shell part 3e, and the side plate 9, which is an independent member but is airtightly attached to the other side of the outer shell part 3e. The cam portion 4a protruding from the rotating shaft 4 is spaced apart from the axis of the rotating shaft 4 and the support pin 10, which is suspended between a pair of mounting pieces 7a, 7a protruding from the top of the slider 7. They are in contact at the same position.

The rotating shaft 4 is provided with a stepped hole 4b in the longitudinal direction of the shaft center on one side thereof, and this stepped hole 4b is provided with locking grooves 4c, 4c, . . . extending in the radial direction and the axial direction. . Projections 6 are provided in these locking grooves 4c, 4c...
The connecting tool 6 is attached to the rotating shaft 4 while fitting the connectors a, 6a...
It engages with a locking hole 2b provided in. At the same time, this connecting tool 6 is connected to the stepped hole 4 of the rotating shaft 4 in the longitudinal direction of the shaft center.
The fixing pin 11 inserted through the locking hole 2b provided in the attachment part 2a of the lid 2 is inserted into the insertion hole 6b, and this fixation The pin 11 is fitted into the small diameter portion of the stepped hole 4b.

A cap 12 is attached to the locking hole 2b,
The head of the fixing pin 11 is hidden from the outside. In the embodiment, the means for fixing the side plate 9 to the outer shell part 3e of the spring case 3 is to fit a protrusion 3g projecting from the outer shell part 3e into a mounting hole 9b provided in the side plate 9, and fix one end of the protrusion 3g. Although it is fixed by crushing the protrusion, screws may be used instead of the protrusion. The spring case 3 has a mounting piece 3h protruding from the bottom.
The locking pin 13 is inserted into the insertion hole 3i provided in the attachment piece 3h through the attachment hole 5b provided at the bottom of the storage section 5. This mounting piece 3h
An insertion hole 5c is provided below the storage hole 5a and perpendicular to the mounting hole 5b for insertion.

As shown in FIG. 1, the locking device B includes a locking member 16 having a locking piece 16a rotatably attached to the rice cooker body 1 by a pin 15 in the machine case 14. , a torsion coil spring 1 that rotationally urges this locking member 16 in a clockwise direction.
7, and an engagement piece 18 having an engagement hole 18a protruding from the lid 2.

Now, when the lid 2 is closed, as shown in FIGS.
a, and the compression coil springs 8, 8 keep the lid 2 in the closed state against the rotational torque applied to the rotating shafts 4, 4 via the sliders 7, 7, but the locking When the pressing part 16b of the member 16 exposed from the machine case 14 is pressed with a finger, the locking member 16 twists around the pin 15 and rotates counterclockwise against the elasticity of the coil spring 17. Since the engagement piece 18 is released from the engagement hole 18a by the engagement piece 16a, as shown in FIG. The rotating shaft 4, which is urged to rotate by pressing 4a, rotates counterclockwise to automatically open the lid 2.

When the opening angle of the lid 2 reaches approximately 70 degrees, as shown in FIG. 8, the protrusion 7b provided at the top of the slider 7 hits the abdomen of the rotating shaft 4, and no further pressing force is applied to the cam portion 4a. Since no action is taken, the lid 2 stops at this opening angle and the compression coil spring 8
It is held in place by its elasticity and will not fall off naturally. Since the opening angle of 70 degrees of the lid 2 is not a sufficient opening angle when taking out the inner pot, when the lid 2 is pushed further, the lid 2 absorbs the elastic influence of the compression coil spring 8 to its original value. 8th without receiving it by appearance
As shown by the imaginary line in the figure, it opens even wider.

Next, as shown by the imaginary line in FIG. 8, the opened lid 2 is closed up to 70 degrees without being affected by the elasticity of the compression coil spring 8; It is closed by pressing against the locking device B in the closed position.
By engaging the engagement hole 18a of the engagement piece 18 with the locking piece 16a of the locking member 16, it is stably locked in the closed state against the elasticity of the compression coil spring 8. be.

The spring case 3 has an airtight structure including an outer shell 3e that covers the periphery thereof and side plates 3b and 9 that are airtightly attached to both sides of the outer shell 3e. is inside the spring case 3 between both side plates 3b,
9, and the rotating shaft 4 and the lid 2 are connected to the connecting tool 6.
Since the structure is configured such that the rice is connected to the outer shell part, the boiling liquid that boils over when the rice is boiled, or the water droplets that run down the inside of the lid 2 when the lid 2 is opened and closed after rice is cooked, are 3e and both side plates 3b and 9, and is prevented from entering into the spring case 3.

In the above embodiment, the rotating shaft 4 and the attachment part 2a of the lid 2 are connected by the connector 6, but one end of the rotating shaft 4 may be extended to the outside of the side plate 3b. It may also be configured such that it is directly connected to the attachment portion 2a of the lid 2.

(Effects) As explained in detail above, this device allows the lid to be opened automatically with a single touch, and there is no need to worry about it falling and getting your hand caught. Since it does not get inside, it is possible to achieve the effect that it will not become unsanitary or cause the coil spring to corrode.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; Fig. 1 is a partially sectional side view of an electronic jar rice cooker implementing this invention; Fig. 2 is a front sectional view of the lid opening/closing device;
The figure is a front view of the rotating shaft, Figure 4 is a right side view of Figure 3, Figure 5 is a sectional view taken along line B-B' in Figure 3, Figure 6 is a perspective view of the connector, and Figure 7 is a FIG. 2 is a cross-sectional view taken along the line A-A', and FIG. 8 is a side cross-sectional view for explaining a state in which the lid is opened. A... Lid opening/closing device, B... Locking device, 1... Rice cooker body, 2... Lid, 3... Spring case,
3b... Side plate, 3e... Outer shell, 4... Rotating shaft,
4a...Cam part, 6...Connection tool, 7...Slider, 8...Compression coil spring, 9...Side plate,
11...Fixing pin.

Claims (1)

[Scope of utility model registration request] A rotating shaft is mounted on a spring case that houses a slider and a coil spring that urges the slider to slide in one direction, and the upward sliding movement of the slider is regulated by this rotating shaft. In addition, a cam portion is provided on the rotating shaft, and the cam portion is configured to come into contact with a part of the slider within a predetermined rotation range of the rotating shaft, so as to apply rotational torque in one direction to the rotating shaft. On the other hand, the upper part of the spring case is covered to prevent moisture from getting inside, so that the entire spring case has a sealed structure, and only the end of the rotating shaft is made to protrude from the spring case, and a lid is placed on this protruding part. A lid opening/closing device characterized in that it is configured such that one end of the lid is attached.