JP4018031B2 - Rice cooker lid energizing structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rice cooker, and in particular to a biasing structure of a lid.
[0002]
[Prior art]
A lid can be opened and closed freely by a hinge pin inserted through the rear part of the rice cooker body, and the main body side spring hook part of the hinge spring attached to the hinge pin is engaged with a part of the rice cooker body, and the lid side spring hook part is covered. The lid is urged in the opening direction by being brought into contact with the back surface of the lens, and the lid is automatically opened by the urging force when the lock is released. Normally, the pair of left and right hinge springs are mounted in a symmetrical shape, but a single hinge spring may be used from the viewpoint of reducing the number of parts (see Patent Document 1).
[0003]
When using a pair of left and right hinge springs in order to give a spring load to the lid in a balanced manner, the hinge springs are mounted in a symmetrical shape as described above, and when a single hinge spring is used. Is attached so that the lid-side spring hook portion contacts the center line of the lid.
[0004]
[Patent Document 1]
JP 2003-38343 A (see FIGS. 2 and 9)
[0005]
[Problems to be solved by the invention]
As described above, it may be required to use a single hinge spring from the viewpoint of reducing the number of parts. However, if the mounting position of the hinge spring deviates from a predetermined position, the contact of the lid-side spring hook portion will be reduced. Since the contact position is deviated from the center line, there is a problem that an uneven load acts on the lid, and the lid is gradually deformed in combination with the influence of the heat cycle by rice cooking.
[0006]
Therefore, the present invention uses a single hinge spring for applying an urging force to the lid, while the point where the load on the lid-side spring hook portion acts does not deviate from the center of the lid, and the spring load is An object is to act on the lid in a well-balanced manner so that the lid does not deform.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention is such that a lid is attached to a rice cooker body by a hinge pin so that the lid can be opened and closed, a single hinge spring is attached to the hinge pin, and the body side provided at one end of the hinge spring Engaging the spring hook portion with the rice cooker body, and bringing the lid-side spring hook portion at the other end into contact with the back surface of the lid to exert an urging force in the opening direction on the lid. In the structure, a configuration was adopted in which a rib along the center line in the front-rear direction of the lid was provided on the back surface of the lid, and the lid-side spring hook portion was in contact with the rib in a cross shape.
[0008]
According to the above configuration, regardless of the positional accuracy of the coil portion of the hinge spring, the lid-side spring hook portion abuts against the rib in a cross shape, and the spring load is transmitted to the center line of the lid through the rib, resulting in an unbalanced load. Can be avoided.
[0009]
When an L-shaped bent portion is provided at the tip of the lid-side spring hook portion and the bent portion is brought into contact with the rib in a cross shape, the position of the coil portion of the hinge spring is equal to the length of the bent portion. Even if the position shifts within the range, the spring load always acts on the center line of the lid.
[0010]
The position of the coil part of the hinge spring can be set to a position including the center line or a position away from the center line.
[0011]
It should be noted that a lid mounting base is provided in the body hinge portion of the rice cooker, the hinge spring is housed in the lid mounting base, the lid hinge member fitted to the lid mounting base, the lid mounting base, and the interior thereof The hinge pin penetrates through the hinge pin and the lid hinge member is attached to the lid mounting base so as to be freely opened and closed, and the biasing force is exerted in the opening direction by the hinge spring, and the outer lid constituting the lid is attached to the lid hinge member If this configuration is adopted, the present invention can be applied to a rice cooker having a structure without a hinge cover.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the rice cooker of embodiment has attached the lid 2 to the rice cooker main body 1 so that opening and closing is possible by the hinge pin 3 (refer FIG. 2). The lid 2 has an inner lid 5 attached to the inner surface of the outer lid 4 and a body portion of the rice cooker body 1 through the hinge pin 3 by a lid hinge member 6 fixed to the inner surface of the outer lid 4 at the rear portion of the inner lid 5. 7 is attached. A single hinge spring 8 is attached to the hinge pin 3, whereby an urging force in the opening direction is applied to the lid 2.
[0013]
A rice cooker 9 is housed inside the rice cooker body 1, and an operation panel 11 is provided on the front surface. An unlock button 12 is provided on the upper portion of the operation panel 11. As shown in FIG. 2, a heating plate 13 is provided inside the rice cooker body 1, and the rice cooker 9 is placed thereon. A steam hole set 15 communicating with the steam hole 14 is attached to the inner lid 5. A lid packing 16 is attached to the outer periphery of the inner lid 5 and is in close contact with the opening periphery of the rice cooker 9. A lid mounting base 17 is provided on the rear upper surface of the body part 7 of the rice cooker body 1, and the outer lid 4 and the inner lid 5 combined therewith are attached to the lid mounting base 17 via the lid hinge member 6. .
[0014]
As shown in FIG. 3, the lid hinge member 6 is provided with hinge portions 18, 18 that are fitted to the outer surfaces of both side surfaces of the lid mounting base 17 so as to protrude rearward on both the left and right sides. 18 are respectively provided with hinge holes 19 and 19 concentrically. A U-shaped fitting part 21 in a plan view is formed between the left and right hinge parts 18, and the fitting part 21 is fitted to the lid mounting base 17.
[0015]
The single hinge spring 8 is housed in the right half of the lid mounting base 17 from the upper end opening 20 when viewed from the rear inside, and the hinge hole 19 of each hinge part 18 and the bearing hole of the lid mounting base 17 are accommodated. The hinge pin 3 inserted through 22 is passed through the coil portion 23 of the hinge spring 8 inside the lid mounting base 17 (see FIG. 3). The main body side spring hook portion 24 provided at one end of the hinge spring 8 is inserted and engaged with the inside of the lid mounting base 17, and the lid side spring hook portion 25 provided at the other end is a hook receiver of the lid hinge member 6. It abuts on the back surface of the outer lid 4 through the portion 26 (see FIG. 2).
[0016]
The lid hinge member 6 is rotatable about the hinge pin 3, and in a state where the lid hinge member 6 is tilted forward (closed state of the lid 2), the fitting portion 21 is fitted to the front surface of the lid mounting base 17 and stands upright. The fitting portion 21 is fitted above the lid mounting base 17 in the (opened state of the lid 2). The lid hinge member 6 and the outer lid 4 are always urged in the standing direction by the spring force of the hinge spring 8.
[0017]
The connecting structure of the lid hinge member 6 and the outer lid 4 is as follows. That is, a rectangular cutout portion 27 shaped to fit the lid mounting base 17 is provided on the rear end surface of the outer lid 4 (see FIGS. 4 and 5). The prismatic screwing boss portions 28, 28 are integrally formed. In addition, an annular reinforcing rib 29 is formed inside each screwing boss portion 28, and a positioning portion by a pair of notches 31, 31 is formed in the reinforcing rib 29.
[0018]
On the other hand, the lid hinge member 6 is provided with boss fitting portions 32 and 32 that match the screwed boss portions 28 and 28 in the vicinity of the hinge portions 18 and 18 (see FIG. 4). A screw hole 33 is provided in the portion 32. Further, as shown in FIG. 6A, a circular arc portion 34 along the outer peripheral surface of the reinforcing rib 29 is formed on the surface of the lid hinge member 6 opposite to the fitting portion 21, and the circular arc portion 33 includes the circular arc portion 34. Positioning protrusions 35, 35, etc. that fit into the notches 31, 31 are provided.
[0019]
As shown in FIGS. 6A and 6B, the arc portion 34 is inserted into the notch 27 of the outer lid 4 to which the inner lid 5 is attached, and the lid hinge member 6 and the inner lid 5 are connected by screws 36 and 36. The attached outer lid 4 is joined.
[0020]
FIG. 7A is a plan view of the vicinity of the hinge pin 3 of the lid 2 attached as described above. As shown in FIG. 7B, a bent portion 37 that is bent in an inverted L shape and extends outward in the length direction of the coil portion 23 is formed at the distal end portion of the lid-side spring hook portion 25. The bent portion 37 abuts against the rib 38 provided on the back surface of the outer lid 4 in a crossing manner and substantially makes point contact. The rib 38 is formed to have a required length on the center line C in the front-rear direction of the outer lid 4 (see FIG. 3C).
[0021]
The position of the coil portion 23 is not only in the state of being separated from the center line C as shown in FIG. 7B, but also in the state including the center line C as shown in FIG. Thus, the arrangement can be such that the center of the coil portion 23 is on the center line C. Even if the position of the coil portion 23 changes as described above, the contact position between the bent portion 37 and the rib 38 is always on the center line C.
[0022]
As described above, since the intermediate portion of the lid-side spring hook portion 25 passes through the hook receiving portion 26 of the lid hinge member 6, the spring force acts on the hook receiving portion 26 and the rib 38 described above. However, if only the spring load acting on the rib 38 is noted, the spring load acts on the center line of the outer lid 4. For this reason, the spring load acting on the outer lid 4 acts on the outer lid 4 in a well-balanced manner without being biased.
[0023]
9, the hook receiving portion 26 of the lid hinge member 6 may be omitted, and the bent portion 37 of the lid-side spring hook portion 25 may be brought into direct contact with the rib 38 of the outer lid 4 in a cross shape. is there. Further, in the rice cooker of the type in which the lid ring member integrated with the outer lid 4 is attached to the rice cooker body 1 side by the hinge pin 3 without using the lid hinge member 6 and the hinge spring or the hinge pin is covered by the hinge cover. In the case where a single hinge spring is mounted on the hinge pin 3 and the bent portion 37 of the lid-side spring hook portion 25 is brought into contact with the rib 38 on the center line of the outer lid 4 in a crossing manner in the same manner as described above. is there. In either case, the spring load acts on the outer lid 4 with a good balance.
[0024]
【The invention's effect】
As described above, according to the present invention, even when there is a single hinge spring, the spring load always acts on the center of the lid, and as a result, the spring load acts on the lid with a good left-right balance. The deformation of the lid is prevented. Further, a stable urging force can be exerted on the lid without being affected by the installation position of the coil portion of the hinge spring and its installation accuracy.
[Brief description of the drawings]
FIG. 1 is a perspective view of a rice cooker according to an embodiment when the lid is opened. FIG. 2 is a sectional view when the lid is closed. FIG. 3 is a partially cutaway sectional view of the hinge portion. FIG. 5 is an exploded perspective view of the lid. FIG. 6A is a partial front view before the lid is attached. FIG. 5B is a partial front view after the lid is attached. FIG. 8B is a plan view of the hinge portion of the lid. FIG. 8B is a plan view of the hinge spring of FIG. 8A. FIG. 8B is a partial cross-sectional view of FIG. FIG. 9 is a cross-sectional view of the hinge part of another embodiment.
DESCRIPTION OF SYMBOLS 1 Rice cooker body 2 Lid 3 Hinge pin 4 Outer lid 5 Inner lid 6 Lid hinge member 7 Trunk part 8 Hinge spring 9 Rice cooker 11 Operation panel 12 Lock release button 13 Heating plate 14 Steam hole 15 Steam hole set 16 Cover packing 18 Hinge part 19 Hinge hole 20 Opening part 21 Fitting part 22 Bearing hole 23 Coil part 24 Body side spring hook 25 Cover side spring hook part 26 Hook receiving part 27 Notch part 28 Screwing boss part 29 Reinforcement rib 31 Notch 32 Boss fitting Part 33 Screw hole 34 Arc part 35 Positioning protrusion 36 Screw 37 Bending part 38 Rib

Claims (3)

A lid is attached to the rice cooker body by a hinge pin so that the lid can be opened and closed, a single hinge spring is attached to the hinge pin, and a body-side spring hook provided at one end of the hinge spring is engaged with the rice cooker body. In the lid urging structure of the rice cooker in which the lid-side spring hook portion of the other end is brought into contact with the back surface of the lid so as to exert an urging force in the opening direction on the lid, A rib urging structure for a rice cooker, characterized in that a rib is provided along a line, and the lid-side spring hook portion is brought into contact with the rib in a crossing manner. The lid bias of the rice cooker according to claim 1, wherein an L-shaped bent portion is provided at a tip portion of the lid-side spring hook portion, and the bent portion is brought into contact with the rib in a cross shape. Construction. The position of the coil part of the said hinge spring was set to the position containing the said center line, or the position away from this center line, The lid biasing structure of the rice cooker of Claim 1 or 2 characterized by the above-mentioned.

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