JP4343185B2 - rice cooker - Google Patents

Description

  The present invention relates to a rice cooker, and more particularly to an outer container mounting structure on a shoulder portion of a container.

  Generally, a rice cooker includes a container having an open top and a lid that opens and closes the container. An inner collar is provided on the inner periphery of the shoulder that forms the upper end of the vessel. An outer container having an open upper end is attached to the inner casing. An inner pot installation space is formed in the body by the integrated outer container and shoulder.

  Conventionally, bayonet coupling has been adopted for the mounting structure of the outer container.

  Specifically, a plurality of insertion portions are provided in the outer container, and a groove-shaped receiving portion that is vertically engaged with the insertion portion is provided in the inner collar of the shoulder portion. Fix with the lower surface of the shoulder part facing upward, place each insertion part on the guide part on the lower surface of the inner collar with the upper end of the outer container facing downward, and rotate the outer container in one direction. enter in. A vertical margin is provided between the receiving portion and the insertion portion, and the inserted insertion portion engages with the receiving portion in the vertical direction. By the plurality of engagements, the outer container and the shoulder are locked up and down without rattling.

  In said structure, since an outer container forms an inner pot installation chamber, when the rice grain adhering to the inner peripheral wall of an inner pot is scraped off with a scissors character, rotational torque is provided to an inner pot. Part of this rotational torque is transmitted from the inner pot to the outer container.

  However, the rotational torque described above can be applied to either the left or right direction around the vertical axis, and therefore, if the tightening margin between the receiving portion and the insertion portion is loose, the insertion portion may come out of the receiving portion.

  For this reason, the inner flange is provided with a restricting portion that stops rotation of the insertion portion on the entry side, and a claw engagement portion is provided on the insertion portion and the inner flange, and the insertion portion engages with the receiving portion in contact with the restriction portion. Furthermore, a rice cooker in which the outer container is prevented from rotating by a claw engagement has also been proposed (see Patent Document 1).

  The outer container mounting structure disclosed in the above-mentioned Patent Document 1 can obtain excellent anti-rotation performance by the claw engaging portion, but the mold structure of the claw engaging portion is complicated in the insertion portion and the inner collar. .

  Therefore, in many cases, a configuration is adopted in which the restricting portion prevents the outer container from rotating on the entry side, and prevents the removal side rotation by tightly determining the tightening margin between the insertion portion and the receiving portion.

Japanese Utility Model Publication No. 6-314

  However, since the outer container mounting structure that tightly determines the tightening margin is forced to twist the outer container with a strong force when connecting the bayonet, the burden on the operator is large.

  In recent years, resource recovery from rice cooker waste has come to be demanded. At this time, the bayonet connection is released. As described above, the rice cooker adopting the outer container mounting structure with a tight tightening margin also has poor dismantling workability.

  Then, the 1st subject of this invention is to prevent rotation of the attached outer container, making it easy to carry out bayonet coupling of the outer container with respect to the inner bowl of the body shoulder of the rice cooker, The problem is to make it possible to easily remove the outer container when the rice cooker is disassembled.

  In order to achieve the first object, the present invention provides an inner collar on the inner periphery of the shoulder of the open upper body, bayonet-couples an outer container with an open upper end to the inner collar, and the shoulder and the In the rice cooker in which the inner pot installation chamber is formed in the body with the outer container, a protrusion is provided on the outer periphery of the outer container, and is inserted into the protrusion and the inner bowl in a state of being connected with a bayonet. This is a configuration in which a rotation preventing member is provided.

  In the above configuration, rotation of the outer container attached by the anti-rotation member inserted in series in the protruding portion and the inner collar in a bayonet-coupled state is prevented. For this reason, the allowance provided between the receiving part of the said inner collar provided for bayonet coupling | bonding and the insertion part of the said outer container can be set loosely, As a result, the said outer container is lighter than the said prior art example The bayonet can be combined with force.

  In order to solve the second problem, the present invention adopts a structure according to the means for solving the first problem, wherein the rotation preventing member is a screw member and only one rotation prevention member is provided. It is a thing. In this configuration, since only one anti-rotation member made of a screw member is attached and detached, the anti-rotation member can be easily attached and detached. Also, the release of the bayonet connection is simple because the tightening margin is set loose as described above. Therefore, this invention can remove the said outer container easily at the time of the disassembly of a rice cooker.

  In the above configuration, if one of the bayonet coupling insertion portions provided in the outer container is used as the projection, the outer portion is more than the case where the projection and the insertion portion are provided apart from each other. The container can be easily formed and the strength of the protrusion can be increased.

  Here, it is possible to adopt a configuration in which the protruding portion is made larger outside the other insertion portion and the rotation range is set at a position deviating from the narrowest portion of the inner collar. By enlarging the protruding portion to the outside from the other insertion portion, the rotation preventing member can be enlarged and the strength as the insertion portion can be given to the protruding portion. Although the rotation radius of the outer edge of the protruding portion is larger than that of the other insertion portion, the rotation range is set at a position outside the narrowest portion of the inner collar, so that the shoulder portion can be prevented from being enlarged. .

As described above, the present invention employs a configuration in which a protrusion is provided on the outer periphery of the outer container, and a detent member inserted in series into the protrusion and the inner collar in a bayonet-coupled state is provided. The rotation of the attached outer container can be prevented while allowing the bayonet coupling of the outer container to the inner bowl of the shoulder portion of the rice cooker to be easily performed.
Moreover, this invention can remove an outer container easily at the time of the dismantling of a rice cooker by adoption of the structure which the said rotation prevention member consists of a screw member and provided only the said rotation prevention member.
In addition, according to the present invention, by adopting a configuration in which one of bayonet coupling insertion portions provided in the outer container is used as the projecting portion, the molding of the outer container is simplified and the strength of the projecting portion is increased. Can be increased.
Further, the present invention enlarges the rotation-preventing member by adopting a configuration in which the protruding portion is made larger than the other insertion portion and the rotation range is set at a position deviated from the narrowest portion of the inner collar. However, it is possible to give the projecting portion strength as the insertion portion and prevent the shoulder portion from being enlarged.

Hereinafter, the rice cooker which concerns on embodiment of this invention is demonstrated based on an accompanying drawing.
As shown in FIG. 1, the rice cooker according to the embodiment includes a container body 1 having an open upper end and a lid body 2 that closes an open portion of the container body 1.

  The vessel body 1 is formed in a substantially rectangular parallelepiped shape as a whole, a shoulder portion 1a constituting the upper end portion thereof, a trunk portion 1b fitted to the shoulder portion 1a up and down, and a trunk portion 1b up and down. And a bottom portion 1c to be fitted. The body 1 is integrated by fastening the shoulder 1a and the bottom 1c with the body 1b interposed therebetween. In addition, the shoulder part 1a and the trunk | drum 1b can also be provided integrally.

  The shoulder 1a is made of resin. As shown in FIG. 2, the side periphery of the shoulder portion 1 a has a substantially rectangular annular shape. An inner periphery that forms an open portion of the container body 1 is formed in the middle between the longitudinal direction and the short direction of the shoulder 1a.

  As shown in FIGS. 1 and 2, an inner collar 11 that is continuous over the entire circumference is integrally provided on the inner circumference of the shoulder 1a. An outer container 3 having an open upper end is attached to the inner casing 11. The inner casing 11 has a heat shield wall 11 a along the side peripheral portion of the attached outer container 3. Due to the shoulder 1 a and the outer container 3, an inner pot installation chamber 4 having an open upper end is formed in the container 1.

  A lid 2 is attached to one short side of the shoulder 1a through a hinge shaft 21 so as to be freely opened and closed. The other short side portion of the shoulder portion 1 a is a storage portion of the liquid crystal display device 5.

  The liquid crystal display device 5 includes a display substrate 51 having a liquid crystal display screen and its control circuit, and a power supply substrate 52 that supplies power to the display substrate 51. The display substrate 51 and the power supply substrate 52 are electrically connected by soldering lead wires to required portions of the substrates 51 and 52 in order to omit a connector member.

  The display substrate 51 is screwed to the screw hole 12 protruding from the inner surface of the shoulder 1a in an inclined posture in which the side located on the short side of the shoulder 1a is on the upper side with respect to the horizontal. The power supply substrate 52 is screwed into the screw hole 13 protruding from the inner surface of the shoulder 1a in a horizontal posture. The pattern surfaces of both the substrates 51 and 52 are directed downward in order to prevent adhesion and solidification of dust, water droplets and the like.

  Here, in order to incline the display substrate 51 with respect to the horizontal, the screw hole portion 12 is provided obliquely downward so as to incline toward the heat shield wall 11a. Therefore, as indicated by a one-dot chain line in FIG. 2, in order to enable the display substrate 51 to be screwed from the inside of the heat shield wall 11a, an opening 11b is formed in the heat shield wall 11a. Yes.

  A plurality of screw receiving base portions 11c for fastening the shoulder portion 1a and the bottom portion 1c are integrally provided on the outer periphery of the heat shield wall 11a. Each screw receiving base portion 11c has a lattice hole 11d inside the base portion in order to prevent sink marks in the vicinity thereof. In this embodiment, by arranging the opening 11b in the vicinity of the screw receiving base 11c, the lattice hole of the screw receiving base 11c and the opening 11b can be formed by the same slide mold. The opening 11b may have a slit shape, but is preferably provided as small as possible in order to improve the heat shielding performance of the heat shielding wall 11a.

  The outer container 3 is made of metal. As shown in FIG. 1, a heating plate 7 on which the inner pot 6 is placed is attached to the bottom of the outer container 3.

  Between the heating plate 7 and the bottom of the outer container 3, a sensor body 8 that protrudes from the through hole of the heating plate 7 and contacts the center of the bottom of the inner pan 6 is incorporated so as to be movable up and down. The center of the bottom of the outer container 3 is opened to provide a vertical movement space for the sensor body 8.

  The outer container 3 is attached by using both bayonet coupling to the inner collar 11 of the shoulder portion 1a and screwing.

  Specifically, as shown in FIGS. 3 and 4, the outer periphery of the upper end of the outer container 3 is an outer casing 31 over the entire circumference. The outer casing 31 is integrally provided with bayonet coupling insertion portions 32a to 32d so as to protrude outward. In addition, the outer edge of the outer collar 31 and the insertion parts 32a-32d is a downward bent part in order to obtain strength.

  On the other hand, the inner flange 11 of the shoulder portion 1a has a guide portion that guides the insertion portions 32a to 32d in the rotation direction by the inner periphery of the heat shield wall 11a and the inner peripheral lower end surface 11e that is an annular horizontal surface. Is configured. Further, in the inner flange 11, a groove-shaped receiving portion is configured by the inner peripheral lower end surface 11e and the receiving walls 11f to 11i facing the inner peripheral lower end surface 11e from the inner periphery of the heat shield wall 11a.

  The shoulder portion 1a is fixed with the lower surface facing upward, the upper end of the outer container 3 is faced downward, the insertion portions 32a to 32d are placed on the inner peripheral lower end surface 11e, the outer container 3 is rotated in one direction, and the insertion portions 32a The outer container 3 can be bayonet-coupled to the inner casing 11 by allowing ~ 32d to enter between the receiving walls 11f to 11i and the inner peripheral lower end face 11e.

FIG. 5 shows a state in which the insertion portion 32b has entered between the inner peripheral lower end surface 11e and the receiving wall 11g. As illustrated in FIG. 5, the length of the vertical interval between the inner peripheral lower end surface 11e and the receiving wall 11g is slightly shorter than the vertical length of the insertion portion 32b. Due to the difference between the two lengths, the bayonet The binding allowance is set. The relationship between the vertical distance between the other receiving walls 11f, 11h, 11i and the inner peripheral lower end surface 11e and the vertical height of the other insertion portions 32a, 32c, 32d are also the same. For this reason, the outer container 3 can be lightly twisted when the outer container 3 is connected to the bayonet.
In the state where the bayonet is connected, the inner peripheral lower end surface 11e and the receiving walls 11f to 11i and the insertion portions 32a to 32d are engaged with each other in a vertical direction with a relatively loose margin, and the outer container 3 is rattled. It is locked to the inner flange 11 without any problem.

  Here, as is apparent from FIG. 4, among the insertion portions 32 a to 32 d, the insertion portion 32 a (also serving as the protruding portion) is larger outside the other insertion portions 32 b to 32 c. Accordingly, a portion of the heat shield wall 11a that guides the outer edge of the insertion portion 32a is bulged outward. The bulging portion determines the rotation range of the insertion portion 32a and is set at a position that is out of the narrowest portion Wmin of the inner flange 11. For this reason, in this embodiment, since the corner part space of the shoulder part 1a which has a substantially rectangular side periphery is utilized effectively, the enlargement of the width direction of the shoulder part 1a can be prevented.

  In addition, a vertical through hole 33 is formed in the insertion portion 32a. The through-hole 33 passes through the receiving wall 11f in a state where the outer container 3 is bayonet-coupled, and is at a position that is vertically aligned with the recessed hole 11j formed in the inner peripheral lower end surface 11e. An anti-rotation member 14 made of a screw member is inserted into the through hole 33 and the recessed hole 11j in the communication state. The anti-rotation member 14 is detachably locked by screwing to the inner surface of the recessed hole 11j. In this way, the rotation preventing member 14 made of a screw member is fastened to only one, and since insertion and locking are performed simultaneously, it can be easily attached and detached.

  The hole diameter of the through hole 33 is determined according to the strength required for the rotation preventing member 14. In this embodiment, since the insertion portion 32a is made larger than the other insertion portions 32b to 32d, the diameter of the through hole 33 is made larger than that in the case where the other insertion portions 32b to 32d and the outer casing 31 are bored. Can do. Moreover, even if the through hole 33 having such a size is formed in the insertion portion 32a, strength as an insertion portion necessary for bayonet coupling can be provided. The anti-rotation member 14 may be screwed to both or one of the inner periphery of the through-hole 33 and the inner periphery of the recessed hole 11j as long as the retaining member 14 is obtained. Also, a vertical screw hole is formed on the upper surface of the receiving wall 11f, and the anti-rotation member 14 is screwed into the screw hole, and the tip of the anti-rotation member 14 is inserted into the through hole 33 in this screwed state. It may be.

  Further, in this embodiment, since the anti-rotation member 14 is formed of a screw member, it can be easily removed using a screwdriver, and thereafter, a palm is inserted between the heat shield wall 11a and the outer container 3 to remove it. When the container 3 is rotated on the other side, the outer container 3 can be removed.

  Further, in this embodiment, since the bayonet coupling and the release of the outer container 3 can be performed with a light force, the outer container 3 can be attached and detached without any trouble even if the heat shield wall 11a is provided integrally with the inner casing 11. It is possible to obtain the advantage of reducing the number of members by making the body 1 compact and integrating the heat shield wall 11a and the shoulder 1a.

  In the case where emphasis is not placed on dismantling properties, the detent member 14 can be a pin member that is locked to the inner periphery of the insertion hole by being pushed in.

Vertical section of rice cooker according to the embodiment The perspective view of the lower surface side of the shoulder part shown in FIG. The perspective view which shows a mode that an outer container is attached to the shoulder part shown in FIG. (A) Assembly view showing the preparation stage for bayonet coupling of the outer container to the inner collar shown in FIG. 1 in bottom view, (b) Assembly diagram showing the state in which the outer container is attached to the inner collar in bottom view Enlarged sectional view taken along line VV shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Body 1a Shoulder part 1b Trunk part 1c Bottom part 2 Cover body 3 Outer container 4 Inner pot installation room 5 Liquid crystal display device 6 Inner pot 7 Heating plate 8 Sensor body 11 Inner bowl 11a Heat shield wall 11b Opening 11c Screw receiving base 11d Lattice Hole 11e Inner peripheral lower end surface 11f-11i Receiving wall 11j Recessed holes 12, 13 Screw hole part 14 Non-rotating member 21 Hinge shaft 31 Outer flange 32a Insertion part (protrusion part)
32b-32d Insertion part 33 Through-hole 51 Display board 52 Power supply board

Claims (3)

An inner bowl is provided on the inner periphery of the shoulder of the open upper bowl, and an outer container with an open upper end is bayonet-coupled to the inner bowl to form an inner pot installation chamber in the bowl with the shoulder and the outer container. In the cooked rice cooker, a protrusion is provided on the outer periphery of the outer container, and a rotation preventing member inserted in series into the protrusion and the inner bowl in a state of being connected with a bayonet is provided . The rice cooker is characterized in that only one anti-rotation member is provided . The rice cooker according to claim 1, wherein one of bayonet coupling insertion portions provided in the outer container is the projecting portion. The rice cooker according to claim 2 , wherein the protruding portion is made larger outside the other insertion portion, and the rotation range thereof is determined at a position deviated from the narrowest portion of the inner bowl.

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