JP3592611B2 - Rice cooker lid - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a general lid of a rice cooker including a rice cooker, and more particularly to a mounting structure of an inner lid.
[0002]
[Prior art]
As shown in FIGS. 8A and 8B, the lid of the rice cooker includes a lid main body 31 and an inner lid 32 detachably attached to the inner surface thereof (for example, see Japanese Patent No. 2990964). A slide hook 33 that is engaged with and disengaged from the rice cooker main body is provided at a front portion of the lid main body 31, and the slide hook 33 is urged rearward by a spring 35. A fitting recess 40 into which the inner cover 32 is fitted is provided on the inner surface of the lid main body 31, and the rear end of the slide hook 33 protrudes and retracts on the inner peripheral surface of the fitting recess 40 so that the movable engaging portion is formed. 36. The front end convex portion 37 of the inner lid 32 is engaged with the movable engaging portion 36.
[0003]
The front end of the slide hook 33 is detachably engaged with a hook lever 38 attached to the rice cooker main body.
[0004]
Engaging portions 46 with an engaging wall for holding the inner lid 32 in cooperation with the movable engaging portion 36 are provided at a rear portion of the lid main body 31. The engaging portions 46, 46 with the engaging walls are provided with two left and right corners of a portion protruding in a rectangular shape outside the fitting recess 40, and the engaging walls 39 protruding above the corners. It consists of. In each of the engagement portions 46 with the engagement walls, a positioning wall 41 in the front-rear direction and left and right positioning walls 42, 42 are formed on both left and right sides by a common wall at a corner portion.
[0005]
On the other hand, the front portion of the inner lid 32 is provided with the above-mentioned front convex portion 37 which is engaged with the slide engaging portion 36, and the rear portion is a square which is engaged with the engaging portion 46 having an engaging wall. Is provided. Positioning reference sides 41 ′, 42 ′, and 42 ′ are provided on both sides of the rear projection 43 along the front-rear positioning wall 41 and the left-right positioning wall 42.
[0006]
The space A between the left and right positioning walls 42 is formed relatively large in order to facilitate the engagement of the rear projection 43. Also, it represents the longitudinal direction of the stroke for the engagement and disengagement of the movable engaging portion 36 in S _1, also the longitudinal length of the engagement wall 39 at S _2. It is set so that S ₁ <S ₂ .
[0007]
When attaching the inner lid 32 to the lid main body 31, the rear convex portion 43 is first engaged with the engaging portions 46 with the engaging wall. In this case, the interval A is set relatively large so that the engagement can be easily performed or the aim for engaging the rear convex portion 43 can be easily set. After the engagement, the front projection 37 is engaged with the movable engagement portion 36.
[0008]
When the front and rear of the engagement procedure is reversed, the front projection 37 which is engaged earlier does not advance only S _1, the rear protrusion 43 having a height of S ₁ is greater than S ₂ It cannot interfere with the engaging wall 39 and engage with the engaging portion 46 with the engaging wall.
[0009]
[Problems to be solved by the invention]
The positioning of the inner lid 32 in the left-right direction is as follows. That is, in the front part of the inner lid 32, the front convex part 37 is engaged with the movable engaging part 36 on the rear end face of the slide hook 33, but the slide hook 33 can freely slide in the front-rear direction. For this purpose, a required gap (so-called play) is provided in the left-right direction. Therefore, the positioning accuracy of the inner lid 32 in the left-right direction by the slide hook 33 is not high.
[0010]
In addition, the positioning accuracy between the rear convex portion 43 and the left and right positioning walls 42, 42 has a large dimensional error due to the shrinkage of the resin at the time of molding because the interval A is large. Therefore, high positioning accuracy cannot be obtained here.
[0011]
If the positioning accuracy of the inner lid 32 in the left-right direction is low, the sealing property between the inner lid 32 and the pot 45 closed by the inner lid 32 is deteriorated, and the appearance of the inner lid 32 is poor due to the disengagement and displacement of the inner lid 32. Will be the cause.
[0012]
Accordingly, it is an object of the present invention to improve the positioning accuracy of the inner lid with respect to the lid body, particularly the positioning accuracy in the left-right direction, and to solve the above-mentioned problems.
[0013]
[Means for Solving the Problems]
In order to solve the above problems, the present invention comprises a lid body, and an inner lid detachably engaged with the inner surface thereof, wherein a fitting recess for the inner lid is provided on the inner surface of the lid body, A rice cooker lid provided with two front and rear engagement portions for engaging the inner lid on the inner peripheral surface of the fitting recess, and determining the order in which the inner lid is engaged with each of the engagement portions. In the above, the left-right positioning portion of the inner lid is provided on the inner peripheral surface of the fitting recess other than the engaging portion having the first rank.
[0014]
In the lid of the rice cooker having the above-described configuration, the engaging portion to be engaged first is formed with a wide interval in the left-right direction in consideration of operability such as facilitating the engagement and aiming at the time of engagement. Therefore, even if the left and right positioning portions are provided in the engaging portions, high positioning accuracy cannot be obtained. Therefore, in the present invention, the left and right positioning portions are provided on the inner peripheral surface of the fitting recess other than the engaging portion to be engaged first. Then, since there is no need to consider operability, the left-right positioning portions can be formed at narrow intervals. The smaller the interval, the higher the molding accuracy of the resin, and therefore the higher the positioning accuracy.
[0015]
As described above, there are the following two configurations in which the order in which the inner lid is engaged with the two front and rear engagement portions of the lid body must be determined before and after.
[0016]
In the first configuration, one of the engagement portions is a movable engagement portion that slides or swings in a front-rear direction at a predetermined stroke, and the other engagement portion has an engagement wall larger than the stroke. This is a case where the engaging portion has a joint wall. In this case, the inner lid cannot be engaged unless the inner lid is first engaged with the engagement portion with the engagement wall, and then is engaged with the movable engagement portion.
[0017]
The second configuration is a case where the magnitude relation is opposite to the above, and a case where the engagement wall of the engagement portion with the engagement wall is smaller than the stroke of the movable engagement portion. In this case, the inner lid cannot be engaged unless the order of engaging the inner lid with the movable engaging portion first and thereafter engaging with the engaging portion with the engaging wall is followed.
[0018]
As a more specific configuration of the movable engagement portion, there is a configuration in which a rear end of a slide hook protrudes and retracts from an inner peripheral surface of a fitting recess of an inner lid formed on an inner surface of a lid main body. . Further, as a more specific configuration of the engagement portion with the engagement wall, a pair of left and right corners protruding outward is formed on the inner peripheral surface of the fitting recess, and the engagement protruding into the corner is provided. There is a configuration in which a joint wall is provided.
[0019]
The above-mentioned left and right positioning parts do not necessarily need to be provided close to the movable engagement part. However, they may be provided on both sides of the movable engagement part, or two movable engagement parts may be provided at the left and right sides. Generally, a configuration is provided in which the left and right positioning portions are provided.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the lid 1 of the rice cooker according to the embodiment includes a lid main body 2 and an inner lid 3 detachably attached to the inner surface thereof, as in the conventional case. The lid body 2 is attached to the jar body 5 by a hinge 4 (see FIG. 3) so as to be openable and closable, and the inner lid 3 closes the pan 6 housed in the jar body 5.
[0021]
The lid body 2 is a resin molded product. A slide hook 7 is slidably attached to the front of the lid body 2 in the front-rear direction, and a tip end of the slide hook 7 is detachably engaged with a hook lever 8 of the jar body 5. Engaged. The slide hook 7 is urged in a retreating direction by a spring 9 (see FIG. 3) incorporated in the lid body 2, a movable engagement portion 11 is provided at a rear end thereof, and a front end provided at a front end of the inner lid 3. The convex part 12 (see FIG. 2 and FIG. 4) is detachably engaged. The stroke when the front convex portion 12 is disengaged from the movable engaging portion 11 is indicated by S ₁ (see FIG. 2). Since the stroke S1 _only needs to be large enough to engage and disengage the front projection 12, a small stroke S1 is sufficient.
[0022]
The inner lid 3 has a metal radiator plate 14 for dissipating the heat of the lid heater 13 (see FIG. 3) provided inside the lid body 2 to the pot 6 side. A resin radiator plate ring 16 is attached with the seal member 15 interposed therebetween (see FIG. 4). The sealing member 15 is in close contact with the flange 17 of the pan 6. The front projection 12 is provided on the outer peripheral surface of the heat sink ring 16, and a pair of front projections 18 are provided on both left and right sides of the front projection 12. Further, L-shaped rear protruding pieces 19, 19 are provided on both left and right sides of the rear end of the inner lid 3, and handles 21, 21 are provided on both right and left sides.
[0023]
A cutout side 20 is formed between the rear protruding pieces 19, 19, in which a part of the heat sink ring 16 is formed in a straight line (see FIG. 2).
[0024]
As shown in FIG. 1, a fitting recess 22 of the inner cover 3 is provided on the inner surface of the cover body 2, and the inner circumferential surface of the fitting recess 22 is engaged with the front protruding pieces 18, 18. Positioning portions 23, 23 to be combined are provided on both sides of the slide hook 7. Each of these positioning portions 23 has an open lower surface (the surface on the side of the jar body 5), and both side edges are left and right positioning walls 23a and 23b (see FIG. 2). The width, that is, the interval between the left and right positioning walls 23a and 23b is indicated by a in FIG. The positioning function may not be provided to the inner positioning wall 23b, and the positioning function may be provided to both outer positioning walls 23a (the interval between the two is indicated by b).
[0025]
Further, engaging portions 24, 24 with an engaging wall formed of an L-shaped corner portion and an engaging wall 24 'are formed on both sides on the rear side of the inner peripheral surface of the fitting recess 22. Each engaging portion 24 with an engaging wall has a front-rear positioning wall 24a (see FIG. 2) at the L-shaped corner portion. The left and right side walls 24b are formed at the above-mentioned L-shaped corner portion, and the interval c between the left and right side walls 24b is wide in consideration of the operability at the time of engagement of the inner cover 3 (the left and right positioning walls 23a, 23b, which is considerably wider than the interval a or the interval b), it is difficult to obtain accuracy in resin molding. Therefore, the left and right side walls 24b are auxiliary positioning walls with respect to the front left and right positioning walls 23a and 23b. An engagement recess 24c is provided inside the engagement wall 24 'of the engagement portion 24 with the engagement wall.
[0026]
The height of the engagement walls 24 'shown in S _2. The relationship between the height _{S 2} and the stroke _{S 1} of the is set to a relationship of _S 1 _{<S 2.}
[0027]
In addition, recesses 25, 25 corresponding to the handles 21, 21 are provided on the inner peripheral surface of the fitting recess 22, and a notch side 20 of the inner lid 3 is provided between the engagement portions 24, 24. Is provided.
[0028]
Note that a configuration in which the movable engaging portion 11 is provided on the inner lid 3 side and the front convex portion 12 engaged with the movable engaging portion 11 is provided on the lid main body 2 side can be adopted.
[0029]
The lid 1 of the rice cooker of the first embodiment is as described above. When the inner lid 3 is attached to the lid main body 2, the rear projecting pieces 19 on both sides thereof are engaged with the respective engaging portions 24 with the engaging walls. , 24 are engaged with the engaging recesses 24c, and then the front projections 18, 18 are fitted into the respective positioning portions 23, 23, and at the same time, the front projection 12 is The movable engagement part 11 of the part is engaged. The front projection 12 is supported while being pushed rearward by the urging force of the spring 9.
[0030]
With the inner lid 3 attached to the fitting recess 22 of the lid main body 2 as described above, the inner lid 3 engages the front convex portion 12 with the movable engagement portion 11 at the front, and at the rear, The rear protruding pieces 19 on both sides are held by the lid main body 2 by engagement with the engagement portions 24 with the engagement wall. Also, due to the elasticity of the spring 9, the lower sides of the rear projecting pieces 19, 19 serve as positioning reference sides and are pressed against the front-rear positioning walls 24a, thereby performing front-rear positioning.
[0031]
In the left-right direction, both sides of each of the front projecting pieces 18, 18 serve as positioning reference sides, and are positioned by the left-right positioning walls 23a, 23b. As described above, the positioning may be performed between the positioning walls 23a on the outer side having the interval b. Since the distance a or b is smaller than the distance A (see FIG. 8) in the conventional case or the distance c between the side walls 24b and 24b of the engaging portions 24 with the engaging walls, errors in resin molding are caused. Is small, and high positioning accuracy can be obtained.
[0032]
When removing the inner lid 3, put a finger on the handles 21, 21 to overcome the elastic force of the spring 9 to release the engagement with the movable engagement portion 11, and then engage the engagement portion with an engagement wall. 24, 24 by disengaging the engagement.
[0033]
Next, in the second embodiment shown in FIG. 5, the front projecting piece 18 is provided at one position on the center of the front part, and the front projection 18 is engaged with the movable engaging part 11 at the rear end of the slide hook 7 on both sides. A pair of left and right front projections 12 are provided.
[0034]
The lid body 2 is provided with one positioning portion 23 that engages with the front projection 18 described above. Left and right sides of the positioning portion 23 become left and right positioning walls 23a and 23b. The interval is the same as in the case described above. Both sides of the front projection 18 serve as positioning reference sides. Other configurations and operations are the same as those of the above-described first embodiment, and therefore, the same portions are denoted by the same reference characters and description thereof is omitted.
[0035]
Next, in the third embodiment shown in FIG. 6, a slide hook 7 is attached to the front part of the lid body 2 so as to be slidable in the front-rear direction, similarly to the above-described embodiments. The slide hook 7 is urged in a retreating direction by a spring (not shown) incorporated in the lid body 2, a movable engaging portion 11 is provided at a rear end portion thereof, and a front convex portion provided at a front end portion of the inner lid 3. The part 12 (see FIGS. 2 and 4) is engaged so as to be able to be disengaged. A stroke when the front convex portion 12 is disengaged from the movable engaging portion 11 is indicated by S ₃ (see FIG. 2). The stroke S ₃ is set larger than the stroke S ₁ of the embodiment described above.
[0036]
The basic configuration of the inner lid 3 is the same as that described above, except that a pair of left and right engaging projections 18 ′, 18 ′ is provided at the rear. Its size and shape are common to the above-mentioned front projecting pieces 18, 18. In addition, handles 21, 21 are provided on the outer side of the respective engaging projections 18 ', 18'.
[0037]
As shown in FIG. 1, a fitting recess 22 of the inner cover 3 is provided on the inner surface of the cover main body 2, and the above-mentioned engaging protrusions 18 ′, 18 The engaging portions 24, 24 with an engaging wall also serving as a positioning portion are provided.
[0038]
Each of the engagement portions 24 with the engagement walls has left and right side positioning walls 23a and 23b. The interval is indicated by a in FIG. The positioning function may not be provided to the inner positioning wall 23b, and the positioning function may be provided to both outer positioning walls 23a (the interval between the two is indicated by b). Further, an engaging wall 24 'is formed on each engaging portion 24 with an engaging wall. The height of the engagement wall 24 'shown in S _4. The relationship between the height _{S 4} the stroke _{S 3} of the is set to satisfy the relationship of _S 4 _{<S 3.}
[0039]
Note that the inner end wall of the engaging portion 24 with the engaging wall becomes the front-rear direction positioning wall 24a (see FIG. 6B).
[0040]
The lid according to the third embodiment is as described above. In this case, the front projection 12 of the inner lid 3 is first engaged with the movable engagement portion 11, and then the engagement projections 18 'are engaged. It is engaged with the engaging portion 24 with the joint wall. The positioning of the inner lid 3 in the left-right direction is performed between the left-right positioning walls 23a and 23b at the interval a or the left-right positioning wall 23a at the interval b with the same positioning accuracy as described above.
[0041]
In the above-described first to third embodiments, the movable engagement portions 11 are all provided at the rear end of the slide hook 7, but the configuration of the movable engagement portions 11 is not limited to this. . For example, as shown in FIG. 7, a fixed hook 7a and a swing hook 7b are provided on the lid body 2, the fixed hook 7a is engaged with the hook lever 8 of the jar body 5, and the swing hook 7b is A configuration for engaging with the front projection 12 can be adopted. The swing hook 7b is urged inward by a spring 7c to support the inner lid 3 in a detachable manner. In this case, the stroke required to detachment of the front protrusion 12 against the pivot hook 7b is set to S ₁ or S ₃ described above.
[0042]
【The invention's effect】
As described above, the present invention provides two front and rear engaging portions for engaging the inner cover on the inner peripheral surface of the fitting recess with the inner cover provided on the lid main body, and each engaging portion has In the lid of the rice cooker in which the order in which the lid is engaged is determined, the left-right positioning portion of the inner lid is provided on the inner peripheral surface of the fitting recess other than the engaging portion in which the order of engagement is earlier. Thereby, the horizontal positioning portion can be provided at a narrow interval, that is, at an interval having high molding accuracy, without considering operability when the inner lid is engaged with the lid main body. For this reason, the positioning accuracy of the inner lid in the left-right direction is improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of the first embodiment. FIG. 2 is a bottom view of the same lid. FIG. 3 is a partial cross-sectional view of the same. FIG. FIG. 6A is a bottom view of the lid according to the third embodiment; FIG. 6B is a cross-sectional view taken along the line bb in FIG. 8A is a bottom view of a lid portion of a conventional example, and FIG. 8B is a partially omitted cross-sectional view of the same.
DESCRIPTION OF SYMBOLS 1 Lid 2 Lid main body 3 Inner lid 4 Hinge 5 Jar main body 6 Pot 7 Slide hook 7a Fixed hook 7b Swing hook 7c Spring 8 Hook lever 9 Spring 11 Movable engaging part 12 Front projection 13 Cover heater 14 Heat sink 15 Seal Member 16 Heat sink plate 17 Flange 18 Front projection 18 'Engagement piece 19 Rear projection 20 Notch side 20' Straight part 21 Handle 22 Fitting recess 23 Positioning parts 23a, 23b Left-right positioning wall 24 Engaging wall Engagement portion 24a Front / rear positioning wall 24b Side wall 24c Engagement recess 24 'Engagement wall 25 recess 31 Lid body 32 Inner lid 33 Slide hook 35 Pulling 36 Movable engaging portion 37 Front end convex portion 38 Hook lever 39 Engage Wall 40 Fitting recess 41 Front / rear positioning wall 41 ′ Positioning reference side 42 Left / right direction positioning wall 42 ′ Positioning reference side 43 Rear projection 4 engaging wall with the engagement portion 45 pot

Claims (1)

A lid main body and an inner lid detachably engaged with the inner surface of the lid main body, a fitting recess of the inner lid is provided on the inner surface of the lid main body, and a slide hook or swing provided on a front portion of the lid main body. A pair of left and right corners projecting outwardly from the rear end of the hook to the inner peripheral surface of the front part of the fitting recess so as to protrude and retract into the front inner peripheral surface of the fitting recess, and projecting outward to the inner peripheral surface of the rear part of the fitting recess. And an engaging wall protruding at a corner thereof to form an engaging portion with an engaging wall, and the height of the engaging wall is increased in the stroke direction of the slide hook or the swing hook. the closure of the larger the cooker, defines a front-rear of the inner lid engagement to engage the movable engaging portion to engage then previously the inner lid in engagement wall with engaging portion, the movable An engaging part is provided at two places on the left and right, and the lower part of the lower surface where the front projection of the inner lid is engaged with the middle part of the two places Right direction positioning portion is provided, rice cooker lid, characterized in that to perform the positioning in the lateral direction of the both sides of the front projection by both sides of the left and right direction positioning portion.

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