CN210565656U - Resin sleeve structure and resin molded article - Google Patents

Abstract

The utility model provides a resin sleeve structure and resin molding can prevent the production of the crackle that arouses by stress. A resin sleeve structure (38) screwed into a screw (39) to fix another member includes an outer cylinder portion (41) capable of supporting a screw shaft portion (40) of the screw (39), and an inner portion (42) integrally formed on the inner side of the outer cylinder portion (41), and the inner portion (42) is provided with engaging portions (45) with which the screw (39) engages, and gap portions (44) formed between the engaging portions (45) in the circumferential direction.

Description

Resin sleeve structure and resin molded article

Technical Field

The utility model relates to a twist public screw member and fix resin sleeve structure of another component and including the resin molded products of this kind of resin sleeve structure.

Background

A conventional resin sleeve structure is described in patent document 1, for example. In the resin sleeve structure described in this document, the male screw member is engaged with the entire circumference of the inner surface of the cylindrical portion to support the screw shaft portion of the male screw member.

[ Prior art documents ]

[ patent document ]

[ patent document 1] Japanese patent laid-open No. 2006-25863

SUMMERY OF THE UTILITY MODEL

[ problem to be solved by the utility model ]

In the above-described conventional resin sleeve structure, when residual stress at the time of screwing in the male screw member or thermal stress generated by temperature change of heating or cooling is applied, since there is no place to release the stress, cracks due to the stress are easily generated in the fragile portion of the cylindrical portion.

In view of the above circumstances, an object of the present invention is to provide a resin sleeve structure capable of preventing the occurrence of cracks due to stress, and a resin molded article having such a resin sleeve structure.

[ means for solving problems ]

The utility model discloses a resin sleeve structure is the resin sleeve structure who twists public screw member and fix another component, and it includes:

an outer cylinder portion capable of supporting a screw shaft portion of the male screw member; and

an inner portion integrally formed inside the outer tube portion; and is

The inner portion is provided with a plurality of engaging portions that engage with the male screw member, and a gap portion that is formed between the plurality of engaging portions in the circumferential direction.

According to the present invention, the male screw member inserted through the other member is screwed into the inner side portion, and the screw shaft portion is engaged with the engaging portion to be fastened. In this case, since the engaging portion can be freely deformed in the gap portion, residual stress generated by fastening is relaxed, and it is possible to avoid the occurrence of cracks in the outer tube portion and the like due to stress at the time of fastening. Further, even when a temperature change of heating or cooling has been exerted, since the engaging portion can be freely deformed in the gap portion, the thermal stress is prevented from being concentrated locally, and the outer tube portion or the like is prevented from being cracked due to the stress caused by heat.

As described above, according to the present invention, the resin sleeve structure can be provided which can suitably prevent the occurrence of cracks due to stress.

In the above-described structure, the first and second electrodes are formed on the substrate,

it is preferable that the gap portion is provided in plurality at regular intervals in the circumferential direction.

According to this configuration, since both end surfaces of the engaging portion in the circumferential direction are deformable toward the respective gap portions, stress acting on the engaging portion is relaxed, and cracks are less likely to occur. Further, since the screw shaft portion is supported by the respective engaging portions in a state where the force acts uniformly in the circumferential direction, stable fastening can be achieved by the male screw member.

In the above-described structure, the first and second electrodes are formed on the substrate,

preferably, the inner cylindrical diameter of the outer cylindrical portion is larger than the nominal diameter of the male screw member.

According to this structure, since there is no damage caused by the male screw member on the cylindrical inner surface of the outer cylindrical portion, it is possible to avoid the occurrence of cracks from the cylindrical inner surface of the outer cylindrical portion when thermal stress is applied.

In the above-described structure, the first and second electrodes are formed on the substrate,

preferably, the engaging portion is formed so as to increase in width in the circumferential direction from the radially inner side toward the radially outer side.

According to this configuration, for example, as compared with the case where the engaging portion has the same width regardless of the radial position, the area in which the thread of the screw shaft portion of the male screw member engages with the engaging portion and the frictional force acts is increased in the engaging portion, and the fastening force can be improved.

The resin molded article of the present invention has the resin sleeve structure described above integrally formed on the back surface of the plate-like portion serving as the outer covering material.

According to the utility model discloses a resin molded product can enjoy the advantage of resin sleeve structure. Further, since the resin sleeve structure can realize a structure capable of preventing cracks due to stress while firmly fastening by the male screw member without increasing the thickness of the outer tube portion or the like, by adopting the resin sleeve structure on the back surface of the plate-shaped portion to be the outer covering material, sink marks (sink marks) are less likely to be generated on the surface opposite to the portion corresponding to the resin sleeve structure. Therefore, a resin molded article satisfying both functionality and design can be easily produced.

Drawings

Fig. 1 is a plan view showing a rice cooker.

Fig. 2 is a side view showing the rice cooker.

FIG. 3 is a sectional view showing a side view of the rice cooker (sectional view A1-A1 in FIG. 1).

FIG. 4 is a sectional view showing a side view of the rice cooker (sectional view A2-A2 in FIG. 1).

Fig. 5 is an exploded perspective view, seen obliquely from the rear and upward, showing a state where the protection frame and the shoulder member are removed from the main body casing.

Fig. 6 is an exploded perspective view seen obliquely from front and upward showing a state where the protection frame and the shoulder member are removed from the main body casing.

Fig. 7 is a bottom view showing the back of the signage component.

Fig. 8 is a bottom view showing the structure of the resin sleeve.

Fig. 9 is a perspective view of the resin sleeve structure viewed obliquely from the front and downward.

Fig. 10 is a sectional view showing a side view of the resin sleeve structure.

Fig. 11 is a side cross-sectional view showing an enlarged periphery of the steam path or the rice-water separating means (an enlarged cross-sectional view of fig. 3).

Fig. 12 is an exploded perspective view, obliquely front and upward, showing each part of the part constituting the steam path.

Fig. 13 is a side view showing a rice-water separating means.

Fig. 14 is a bottom view showing the rice-water separating means.

Fig. 15 is a sectional view showing a front view of the rice-water separating means (sectional view taken along line A3-A3 in fig. 14).

Fig. 16 is an exploded perspective view showing an oblique rear-upper view of a lower member and a foaming member of the rice-water separating means.

Fig. 17 is a sectional view schematically showing a state where steam flows into the rice-water separating means.

Fig. 18 is a sectional view schematically showing a state where the rice water is returned from the rice water separating means toward the cooking space.

Fig. 19 is a schematic cross-sectional view showing a first erroneous mounting state.

Fig. 20 is a schematic cross-sectional view showing a second erroneous mounting state.

Fig. 21 is a bottom view showing a rice-water separating means in another embodiment.

Fig. 22 is a sectional view showing a front view of a rice-water separating means according to another embodiment (sectional view taken along line a4-a4 in fig. 21).

Fig. 23 is an exploded perspective view showing an oblique rear-upper view of a lower member and a foaming member of a rice-water separating means according to another embodiment.

[ description of symbols ]

15: lid (another component)

16: label component (resin molding)

38: resin sleeve structure

39: screw (Male screw component)

40: screw shaft

41: outer cylinder part

42: inner side part

43: plate-shaped part

44: gap part

45: engaging part

D1: inner diameter of cylinder

D2: nominal diameter

E: outer packaging material

Detailed Description

Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings. In the present embodiment, the pressure type rice cooker 1 will be described as an example of the "rice cooker". The pressure cooker 1 is a cooker of which Heating method is Induction Heating (IH) method. The front-rear direction of the pressure cooker 1 is referred to as the front-rear direction shown in fig. 1 and 2.

As shown in fig. 1 to 4, the pressure cooker 1 (an example of a "cooker") includes a main body unit 2 and a lid unit 3 openable and closable with respect to the main body unit 2. The main body unit 2 and the lid unit 3 are coupled by a hinge mechanism 4 located at the rear of the pressure cooker 1. As shown in fig. 3 and the like, the cover unit 3 is supported openably and closably with respect to the body unit 2 via a hinge mechanism 4. By closing the lid unit 3, a cooking space S1 is formed between the lid unit 3 and the main body unit 2, in which the cooked food can be pressure-cooked. In addition, the cover unit 3 is swingable about a swing axis X of the hinge mechanism 4 with respect to the main body unit 2, and is opened and closed.

As shown in fig. 3, 4, etc., an inner pot 5 for receiving the cooked food is received in the body unit 2. The body unit 2 includes a body case 6 constituting a part of the outer package E, a support structure portion 85 constituting a part of the outer package E, and the like. The support structure portion 85 includes a shoulder member 9 constituting a part of the outer package E adjacent to the upper side of the main body case 6, and a protection frame 8 having a higher strength than the shoulder member 9 and integrally connected and fixed to the lower side of the shoulder member 9. The support structure 85 includes a housing 7 for housing the inner pot 5, and a coupling portion 86 extending rearward from the housing 7 and coupling and supporting the hinge mechanism 4. The main body unit 2 includes an IH heater 10 as a heating member, a center sensor 11 as an example of a sensor for detecting the pot temperature of the inner pot 5, a main body side control device 12 for controlling the IH heater 10, a cooling fan 13 for discharging the heat inside to the outside, and the like.

As shown in fig. 3 to 6, the main body case 6 surrounds a lower portion of the support structure portion 85, and constitutes a part of the outer package E adjacent to a lower side of the support structure portion 85.

The shoulder member 9 may be made of synthetic resin such as polypropylene, for example. The protective frame 8 may be made of a material having a higher strength than the shoulder member 9, for example. Specifically, the protective frame 8 may be made of heat-resistant synthetic resin such as polyethylene terephthalate.

As shown in fig. 1 to 3, the cover unit 3 includes: a support base 14 serving as a rigid member for supporting the respective members, a cover 15 ("another member" example) constituting a part of the outer package E, a label member 16 ("resin molded product" example) constituting a part of the outer package E and fixedly coupled to the cover 15, a sheet metal frame 17 coupling the hinge mechanism 4 to the support base 14, a cover-side control device 18 connected to the main body-side control device 12, a lock mechanism 19, a lock release lever 20 for releasing the lock mechanism 19, operation buttons 21 for performing various operations, a display unit 22 for displaying various information under the control of the cover-side control device 18, and the like. The cover unit 3 is provided with an inner cover unit 23 detachably attached to the lower surface of the support base 14.

As shown in fig. 3, the main body-side controller 12 and the cover-side controller 18 are connected by a Flexible Flat Cable 80(FFC (Flexible Flat Cable); wiring Cable). The flexible flat cable 80 is disposed so as to pass through the vicinity of the hinge mechanism 4 and the vicinity of the rear end portion of the body unit 2.

As shown in fig. 1, the area where the lock release lever 20, the operation button 21, and the display portion 22 are arranged is widely arranged using the front half portion of the top surface of the cover unit 3.

As shown in fig. 1 to 4, fig. 11 and the like, the lid unit 3 is provided with a rice-water separating means 25, and the rice-water separating means 25 introduces a steam flow containing rice water from a cooking space S1 for cooking rice to be cooked into the rice object through a steam path P, separates the rice water in an internal gas-liquid separating space S2, and discharges the steam from the steam outlet 24. The rice-water separating means 25 is detachably provided in the recess of the lid 15.

When the cover unit 3 is in the non-pressurized state, the lock release lever 20 is pressed to release the lock of the closed state of the cover unit 3 with respect to the main unit 2, and the cover unit 3 is swung to the open state by the urging force of the hinge spring 26 (see fig. 3 and the like). Although the detailed description is omitted, the lid unit 3 cannot be unlocked even if the lock release lever 20 is operated in the pressurized state during pressure cooking.

As shown in fig. 3, 4, and the like, the inner cover unit 23 includes: a plate-shaped inner lid 27, an annular inner lid gasket 28 for sealing the inner lid 27 and the upper edge of the inner pot 5, a pressure regulating portion 29 having two pressure regulating holes for allowing a steam flow containing rice water or rice water to flow therethrough, pressure regulating balls (not shown) corresponding to the pressure regulating holes, and the like.

As shown in fig. 3, 4, etc., by closing the lid unit 3, the inner pot 5 is sealed by the inner lid unit 23, and a cooking space S1 for cooking the rice to be cooked is formed between the lid unit 3 and the main body unit 2.

The pressure cooker 1 can perform cooking (pressure cooking) in which the cooking space S1 is maintained in a pressurized state exceeding atmospheric pressure by the action of the pressure adjusting unit 29 shown in fig. 3, 4, 11, and 12. For example, the pressure regulating unit 29 may switch the pressure state of the rice cooking space S1 to an atmospheric pressure (1atm), a first pressurized state (e.g., 1.05atm) higher than the atmospheric pressure, and a second pressurized state (e.g., 1.25atm) higher than the first pressurized state.

[ Structure for preventing clearance between the body case 6 and the shoulder member 9 ]

As shown in fig. 3 to 6, the support structure portion 85 includes a shoulder member 9 and a protection frame 8 connected and fixed to the shoulder member 9 so as to be integrated therewith. The protective frame 8 is provided with a rear extension 30 integrally connected to the rear of the housing 7 and connecting and fixing the hinge mechanism 4. The protective frame 8 includes a rigid member that is less likely to elastically deform.

The bottom surface of the housing portion 7 of the protective frame 8 is fixed to the main body case 6 by screw fixation or the like. As shown in fig. 5, the protection frame 8 and the shoulder member 9 are fastened and fixed at the edge by a plurality of fastening structures 31. Each engaging structure 31 engages the rectangular ring-shaped body on the shoulder member 9 side with the hook body on the protective frame 8 side.

As shown in fig. 3 to 6, the shoulder member 9 includes a rear extension 32 extending rearward relative to the housing portion 7. At the rear of the rear extension 32, a support metal plate 34 that supports a pin member 33 elongated in the lateral direction in the hinge mechanism 4 is included.

As shown in fig. 2 to 6, the shoulder member 9 is provided with an exposed portion 87 that is sandwiched between the cover unit 3 and the main body case 6 and exposed to the outside. The exposed portion 87 is formed so as to be located on the entire periphery of the upper edge portion of the main unit 2.

As shown in fig. 4 to 6, a locking structure 35 capable of locking the main body case 6 to the protection frame 8 side is provided at the rear part of the main body unit 2. The locking structure 35 includes a protrusion 37 protruding from the support structure 85 toward the main body case 6, and a pressed protrusion 36 protruding from the main body case 6 toward the support structure 85 and capable of receiving a pressing force from below by the protrusion 37. The protrusion 37 is formed at the rear end of the protective frame 8 by integral molding.

As shown in fig. 4 and 5, the stopper structure 35 is located further rearward than the hinge mechanism 4. A pair of locking structures 35 are provided with a predetermined distance therebetween in the left-right direction. That is, two (a plurality of) locking structures 35 are provided.

As shown in fig. 4, the pressed projection 36 has a triangular shape protruding from the inner surface of the main body case 6 in a side view. As shown in fig. 5, the protrusion 37 has a substantially U-shape in a rear view, and surrounds the lower surface and both side surfaces of the corresponding pressed protrusion 36. When pressure cooking is performed, the bottom surface of the protrusion 37 pushes up the lower surface of the pressed protrusion 36.

As shown in fig. 5, the pressure cooker 1 includes another locking structure 91. The other stop structure 91 is located further forward than the hinge mechanism 4. The other locking structure 91 is provided at the rear of the body unit 2, and includes a protrusion 93 protruding from the support structure 85 toward the body case 6, and a pressed piece 92 protruding from the body case 6 toward the support structure 85 and capable of receiving a pressing force from below by the protrusion 93.

As understood from fig. 3, 4, and the like, when pressure cooking is performed, the cooking space S1 is in a pressurized state in which it is pressurized to a pressure exceeding atmospheric pressure, and receives a force that the lid unit 3 is about to lift up with respect to the body unit 2. Therefore, the protection frame 8 and the shoulder member 9 integrally fixed to the protection frame 8 can be lifted by the hinge mechanism 4 as a connecting portion between the main body unit 2 and the cover unit 3. Therefore, in the pressure cooking, there are cases where: the rear extension part 30 of the protective frame 8 and the rear extension part 32 of the shoulder member 9, which are cantilevered rearward from the cooking space S1 (the accommodating part 7), are pulled and lifted by the hinge mechanism 4 and bent and deformed, if only a little.

However, in this case, as shown in fig. 4 and 5, the locking structure 35 and the other locking structure 91 are provided at the rear portion of the main unit 2. In the locking structure 35, the pushed projection 36 is pushed upward by the projection 37 formed on the protective frame 8, and the main body case 6 is pulled toward the shoulder member 9 in accordance with the bending deformation of the protective frame 8 and the shoulder member 9. In the other locking structure 91, the projection 93 formed on the protective frame 8 also pushes the pressed piece 92 upward, and the main body case 6 is pulled into the shoulder member 9 side. Therefore, when pressure cooking is performed, it is possible to effectively prevent an apparent gap from being generated between the body casing 6 and the shoulder member 9 at the rear end portion of the body unit 2, and to become a visually unimpaired person.

Further, since the reinforcing metal plate or the like may not be provided on the rear surface portion of the main body housing 6, the antistatic measures for the flexible flat cable 80 may be omitted. Further, since such a reinforcing metal plate or the like may not be provided, as shown in fig. 2 to 4, the rear surface portion of the main body case 6 may be designed to be curved so as to be inwardly directed from above toward below. Therefore, the design of the rear surface portion of the body unit 2 is improved.

[ concerning the resin sleeve structure 38]

As shown in fig. 7 to 10, the label member 16 constituting a part of the outer package E of the pressure cooker 1 has a resin sleeve structure 38 in which cracks due to stress are less likely to occur at an appropriate position on the back surface of the plate-like portion 43 whose surface serves as the outer package. The resin sleeve structure 38 is used to screw a metal screw 39 (an example of a "male screw member") to fix the cover 15. To be described, the resin sleeve structure 38 is integrally formed on the hard resin label member 16, and is used for fastening the label member 16 to the cover 15 by the metal screw 39.

As shown in fig. 8 to 10, the resin sleeve structure 38 includes an outer tube portion 41 through which a screw shaft portion 40 of the screw 39 is inserted and supported, and an inner portion 42 integrally formed inside the outer tube portion 41 and into which the screw 39 is engaged to exert a fastening force. The outer tube portion 41 is provided on the back surface (lower surface) of the plate-like portion 43 of the label member 16. As shown in fig. 10, a screw 39 is inserted from the back side (lower side) of the insertion hole formed in the cover 15, and the screw 39 is fastened to the resin sleeve structure 38 on the back side of the label member 16, thereby fixing the label member 16 to the cover 15. In the present embodiment, the resin sleeve structure 38 is fastened by self-tapping with the screw 39 without performing screw cutting in advance.

As shown in fig. 8 to 10, the inner portion 42 is provided with a gap portion 44 as a space in which the engaging portion 45 is separated in the circumferential direction. The gap portion 44 is formed over substantially the entire area of the inner portion 42 in the axial direction. Four (a plurality of) gap portions 44 are provided at regular intervals in the circumferential direction. The circumferential width of the gap portion 44 is shorter than the circumferential width of the engagement portion 45. This ensures that the engaging portion of the screw 39 in the engaging portion 45 is relatively large, and thus, strong fastening can be performed.

As shown in fig. 8 and 9, in the resin sleeve structure 38, the engaging portion 45 of the inner portion 42 is formed so as to increase in width from the radially inner side toward the radially outer side. In a cross-sectional view orthogonal to the axial direction, the engaging portions 45 of the inner portion 42, which are not the gap portions 44, are each substantially sector-shaped. Therefore, when the screw 39 is screwed into the engaging portion 45 of the inner portion 42, the engaging portion can be increased, and the fastening force can be increased.

The gap portion 44 of the inner portion 42 is formed so as to increase in width from the radially inner side to the radially outer side. In a cross-sectional view orthogonal to the axial direction, each of the gap portions 44 has a substantially fan-like shape. The gap 44 extends in the axial direction from the end surface of the inner portion 42 to the boundary with the plate-shaped portion 43.

As shown in fig. 8, 9, and the like, the reinforcing ribs 46 are provided between the outer tube portion 41 and the plate-like portion 43 of the label member 16. A plurality of reinforcing ribs 46 are provided in a dispersed manner in the circumferential direction. The boundary between the base of the outer tube 41 and the plate 43 is reinforced by the reinforcing ribs 46, and cracks and the like are less likely to occur.

As shown in fig. 8, in the resin sleeve structure 38, the cylinder inner diameter D1 of the outer cylinder 41 is larger than the nominal diameter D2 of the screw 39. The inner surface diameter D3 of the engaging portion 45 of the inner portion 42 is smaller than the nominal diameter D2 of the screw 39. That is, the screw 39 preferably has a nominal diameter D2 larger than the inner surface diameter D3 of the inner portion 42 and smaller than the cylinder inner diameter D1 of the outer cylinder portion 41. This prevents the inner surface of the outer tube 41 from being damaged by the screw 39, and thus the outer tube 41 is less likely to be cracked. The screw groove of the screw 39 has a diameter smaller than the inner surface diameter D3 of the engaging portion 45.

With this resin sleeve structure 38, when heating and cooling during cooking are applied to the outer cylindrical portion 41, the engaging portion 45 of the inner portion 42 can be deformed so as to enter the gap portion 44, and therefore thermal stress can be released. Therefore, the outer cylindrical portion 41 or the boundary between the outer cylindrical portion 41 and the plate-like portion 43 can be prevented from being cracked due to thermal stress. Further, since cracks can be prevented without increasing the thickness of the outer tube portion 41, the resin sleeve structure 38 in which sink marks are less likely to occur on the surface of the thin plate-like portion 43 constituting the outer covering material E when integrally molded is obtained. Further, since sink marks are avoided, it is possible to avoid excessively thickening the plate-shaped portion 43 of the sign member 16. That is, the amount of resin used can be reduced, which contributes to cost reduction.

[ concerning the steam path P ]

As shown in fig. 11, 12, and the like, the lid unit 3 is provided with a steam path P to which the rice-soup separating unit 25 having the steam outlet 24 is connected from the pressure regulating unit 29. A steam flow containing rice water or liquid rice water or the like passes in the steam path P.

The steam path P includes a plurality of portions (members). For example, as the portion constituting the steam path P, there are included: an extension member 48 extending so as to be apart from the pot center C of the inner pot 5, and provided with an outlet 47 for guiding steam flow toward the rice-water separation unit 25; a first gasket 49 sealing the outlet 47 and the rice-water separating unit 25; and a second gasket 50 sealing the outer end of the extension member 48.

As shown in fig. 11 and the like, the steam path P includes a guide portion 52 having a rice-water returning surface 51 that slopes downward from the rice-water separating means 25 side toward the pressure regulating portion 29 side. The slope of the rice water returning surface 51 may be set to an angle of about 10 degrees to about 20 degrees, for example. In the guide portion 52, upright lateral wall portions are provided on both side surfaces of the rice-water returning noodle 51. An intermediate opening 54 through which steam flow or rice water passes is provided between the extension member 48 and the surrounding portion 53 that is a part of the support base 14 surrounding the space around the pressure adjusting portion 29.

As can be understood from fig. 3 and the like, in the pressure cooker 1, since a portion supporting the hinge mechanism 4 on the main unit 2 side receives a strong force during pressure cooking, the position of the inner pot 5 is set at a position rather in front from the hinge mechanism 4 in order to improve the strength. Further, as shown in fig. 1, 3, and the like, in order to improve the convenience for the user, the region where the operation buttons 21 or the display portion 22 is provided is arranged using the region above the front half of the cover unit 3. Therefore, in the lid unit 3, the rice-water separating unit 25 must be disposed at a position away from the inner pot 5 and avoiding the operation button 21, the display portion 22, or the like. Therefore, as shown in fig. 3 and 11, the rear end position B1 of the steam path P extends to a position B2 directly above the minimum inner diameter portion 55 where the inner diameter becomes the minimum in the inner pot 5.

That is, the extension member 48, the first gasket 49, the second gasket 50, etc. may be provided to set the terminal position of the steam path P at a position distant from the inner pot 5. Specifically, the steam path P may be freely arranged by selecting an appropriate shape for the extension member 48 or the like according to the positional relationship between the inner pot 5 and the rice-soup separating means 25. The degree of freedom in the layout design of the rice-water separating unit 25 is improved. As a result, the degree of freedom in design of the cover unit 3 is intentionally increased.

[ separating unit 25 for rice and rice soup ]

As shown in fig. 3, 11, 13 to 18, and the like, the rice-water separating means 25 includes: a steam flow or rice water flows into and flows out from the lower member 56 and the rice cooking space S1 through the steam path P; and an upper member 57 combined with the lower member 56 to form a gas-liquid separation space S2 for separating the vapor of the gas from the liquid rice water.

As shown in fig. 14, 16 to 18, and the like, the lower member 56 is provided with an introduction hole 58 for introducing a steam flow containing rice water from the cooking space S1 to the gas-liquid separation space S2, and a return hole 59 for returning the rice water stored in the gas-liquid separation space S2 to the cooking space S1. The introduction hole 58 is formed inside a cylindrical peripheral wall 81 extending in a chimney shape and rising from the lower surface of the lower member 56. The return holes 59 are, for example, fan-shaped, and are provided in a plurality of numbers dispersed in the circumferential direction.

As shown in fig. 3, 13, 14, 16, and the like, the lower member 56 includes an attachment/detachment hook 61 (see fig. 13 and the like) biased in the protruding direction by a biasing spring 60 (see fig. 3). The detachable hook 61 is locked with a locking piece 62 provided on the cover 15, so that the rice-water separating unit 25 can be properly attached to the cover 15. The lower member 56 includes a pair of annular coupled portions 63 and a rectangular protruding piece 64.

As shown in fig. 1, 3, 11, 13, and the like, the upper member 57 is provided with a steam release port 24 for releasing steam from the gas-liquid separation space S2 to the outside. As shown in fig. 11, etc., the upper member 57 is provided with a detour wall 65 for detouring the rice water introduced from the introduction hole 58 so as not to directly reach the steam discharge port 24. The bypass wall 65 extends downward until it reaches the vicinity of the upper end of the peripheral wall 81. The upper member 57 includes a pair of fixed hooks 66 hooked on the corresponding coupled portions 63, and a swing hook 67 hooked on the projecting piece 64.

As shown in fig. 11, 15 to 18, and the like, the rice-water separating means 25 includes: an introduction hole 58 for introducing a steam flow; and a foaming member 68 attached to the introduction hole 58 and acting by the steam flow passing through the introduction hole 58 to reduce the size of the rice water contained in the steam flow. The vesiculated member 68 comprises an elastomeric material.

As shown in fig. 15 to 18, the vesiculation member 68 includes: a shaft portion 69 guided in a flow direction of the steam flow; and a first covering portion 70 provided at the front end of the shaft portion 69 and covering the introduction hole 58. The shaft portion 69 is supported by a shaft support portion 75 provided at the lower side member 56. The shaft 69 includes an enlarged diameter portion 82 having an enlarged diameter larger than the other portions. The poult member 68 is attached to the lower member 56 in such a manner that the expanded diameter portion 82 is elastically deformed, the shaft support portion 75 is inserted, and the shaft support portion 75 is sandwiched between the first covering portion 70 and the expanded diameter portion 82. That is, the vesiculated member 68 is removably mounted to the lower member 56.

As shown in fig. 15 and 16, the shaft support portion 75 is supported by the wall surface of the introduction hole 58. The introduction hole 58 is divided into, for example, four (a plurality of) small holes 58A by the shaft support portion 75. The aperture 58A is fan-shaped. Therefore, the rice soup contained in the steam flow is crushed larger than the small holes 58A and is made into small bubbles. Therefore, the small holes 58A and the first covering portion 70 of the small-bubble forming member 68 form the small bubbles of the rice water in the introduction hole 58 in two stages.

As shown in fig. 15, 16, 19, and the like, the first covering part 70 is provided with a first spacer 71, and the first spacer 71 secures a space through which the fluid passes between the gas-liquid separation space S2 and the rice cooking space S1 when the foaming member 68 is erroneously mounted. The first spacers 71 are provided in four (a plurality of) numbers with a gap therebetween in the circumferential direction.

The rice water separating unit 25 includes: a return hole 59 for returning the rice water from the gas-liquid separation space S2 to the cooking space S1; and an inflow prevention member 72 installed at the return hole 59 to prevent steam flow from flowing from the return hole 59 into the gas-liquid separation space S2.

As shown in fig. 17 to 20, etc., the inflow prevention member 72 is disposed on the same axis as the vesiculation member 68. The inflow prevention member 72 includes an elastic material. The inflow prevention member 72 includes a second covering portion 73 that covers the return hole 59. In addition, the inflow prevention member 72 is provided with a pair of guide shaft portions 88. Each guide shaft portion 88 is inserted into a corresponding mounting hole portion 89 in the lower member 56 and mounted while being elastically deformed. That is, the inflow prevention member 72 is detachably attached to the lower member 56. The inflow prevention member 72 is provided with a through hole 90 having a diameter substantially the same as that of the introduction hole 58.

As shown in fig. 14, 20, and the like, the second covering portion 73 is provided with a second spacer 74, and the second spacer 74 secures a space through which the fluid passes between the gas-liquid separation space S2 and the rice cooking space S1 when the inflow prevention member 72 is erroneously mounted. The second spacers 74 are provided in four (a plurality of) numbers with gaps therebetween in the circumferential direction.

As shown in fig. 11 and 17, in the case of pressure cooking, with respect to the foaming member 68, the first covering portion 70 is pushed upward by the steam flow introduced from the introduction hole 58 into the gas-liquid separation space S2 during pressure cooking, and the shaft portion 69 moves until the diameter-enlarged portion 82 touches the shaft supporting portion 75. The vapor flow passes through the gap between the first cover portion 70 and the peripheral wall 81 and flows into the gas-liquid separation space S2. The gap between the first covering portion 70 and the peripheral wall 81 is smaller than the opening area of the small hole 58A. Therefore, the rice water bubbles larger than the gap between the first covering part 70 and the peripheral wall 81 do not flow into the gas-liquid separation space S2. Further, since the foaming member 68 drops by its own weight so as to block the gap between the first covering portion 70 and the peripheral wall 81, the first covering portion 70 is in a state of fluttering, whereby the rice and rice soup can be efficiently broken. At this time, the return hole 59 is blocked by the inflow prevention member 72, and the steam flow does not flow from the return hole 59 into the gas-liquid separation space S2.

As shown in fig. 11 and 18, when the pressure cooking is completed, the rice water stored in the gas-liquid separation space S2 flows downward by its own weight, passes through the return hole 59 and the upper surface of the second covering portion 73 of the inflow prevention member 72, flows toward the rice water return surface 51 of the steam path P, passes through the pressure adjustment hole of the pressure adjustment portion 29, and returns to the cooking space S1.

[ measures for preventing erroneous attachment of a blister component ]

The vesicle member 68 is attached to the lower member 56 so as to sandwich the shaft support portion 75 between the first covering portion 70 and the diameter-enlarged portion 82. As shown in fig. 11, 15, 17, 18, and the like, when the first covering section 70 is accurately attached, the first covering section 70 is attached in a posture of approaching the center side of the gas-liquid separation space S2. However, since the vesiculated member 68 comprises an elastic material, it is also assumed that the user mistakenly attaches the device during maintenance.

For example, as shown in fig. 19, there is a case where the first erroneous mounting state is a state where the bubbling prevention member 68 is mounted in a posture in which the first covering portion 70 is away from the center side of the gas-liquid separation space S2 in the opposite direction, and then the inflow prevention member 72 is mounted in the return hole 59. However, in this case, as can be understood from fig. 16, 19, and the like, the first spacer 71 of the vesicle member 68 secures a gap that allows the passage of the fluid between the first covering portion 70 and the second covering portion 73 of the inflow prevention member 72, and the path of the fluid passing through the return hole 59 and the through hole 90 of the inflow prevention member 72 can be secured. Therefore, when the pressure in the cooking space S1 is reduced from the pressurized state to the atmospheric pressure, the pressure in the cooking space S1 can be discharged to the outside through the gas-liquid separation space S2 and the steam outlet 24.

That is, in the first erroneous attachment state in which the inflow prevention member 72 is attached to the vesicularization member 68 after the shaft portion 69 is attached to the shaft support portion 75 in the reverse direction, the first spacer 71 ensures a gap through which the fluid can flow between the first covering portion 70 and the second covering portion 73.

Further, as shown in fig. 20, for example, there is a case where the inflow prevention member 72 is attached to the return hole 59 and then the bubbling prevention member 68 is attached in a posture in which the first covering portion 70 is away from the center side of the gas-liquid separation space S2 and is reversed. However, in this case, as can be understood from fig. 14, 20, and the like, the second spacer 74 of the inflow prevention member 72 ensures a gap that allows the passage of the fluid between the second covering portion 73 and the first covering portion 70, and thus a path through which the fluid passes through the inlet hole 58 and the through-hole 90 can be ensured. Therefore, when the pressure in the cooking space S1 is reduced from the pressurized state to the atmospheric pressure, the pressure in the cooking space S1 can be discharged to the outside through the gas-liquid separation space S2 and the steam outlet 24.

That is, in the second erroneous mounting state in which the inflow prevention member 72 is mounted to the return hole 59 and the shaft portion 69 of the vesiculation member 68 is mounted to the shaft support portion 75 in the opposite direction, the second spacer 74 ensures a gap through which the fluid can flow between the first covering portion 70 and the second covering portion 73.

Hereinafter, another embodiment in which the present embodiment is modified will be described. The embodiments can be combined as appropriate as long as no contradiction is generated. The scope of the present invention is not limited to the contents shown in the embodiments. That is, equivalents of the elements in the respective embodiments are also included in the scope of the present invention.

(1) In the above embodiment, the example in which the two locking structures 35 are provided is shown, but the present invention is not limited thereto. For example, only one locking structure 35 may be provided. Further, three or more locking structures 35 may be provided. One, three or more locking structures 91 may be provided.

(2) In the above embodiment, the example in which the protrusion 37 is provided on the protective frame 8 is shown, but the present invention is not limited thereto. For example, the protrusion 37 may be provided on the shoulder member 9 fixed integrally with the protection frame 8. That is, the protrusion 37 may be provided on a member (on the side of the protective frame 8) fixed integrally with the protective frame 8.

(3) In the above embodiment, the protrusion 37 on the protective frame 8 side has a substantially U-shape and the pressed protrusion 36 on the main body case 6 side has a substantially triangular shape, but the present invention is not limited to this. For example, the protrusion 37 on the side of the protective frame 8 may have a substantially triangular shape, and the pressed protrusion 36 on the side of the main body case 6 may have a substantially U-shape.

(4) In the above embodiment, the resin sleeve structure 38 is shown as an example in which the screw cutting is not performed in advance, but the present invention is not limited to this. For example, a guide groove having a diameter smaller than the nominal diameter D2 of the screw 39 may be previously screw-cut into the inner portion 42.

(5) In the above embodiment, the resin sleeve structure 38 is exemplified in which the inner portion 42 is formed to have a width that increases from the radially inner side toward the radially outer side, but the present invention is not limited thereto. For example, the inner portions 42 may have the same width regardless of the radial position. The inner portion 42 may be formed so as to have a width that decreases from the radially inner side toward the radially outer side.

(6) In the above embodiment, the example in which four gap portions 44 are provided is shown, but the present invention is not limited to this. For example, two, three, or five or more gap portions 44 may be provided. In this case, it is preferable that the gap portions 44 are provided at equal intervals in the circumferential direction, because the force receiving conditions of the respective portions of the inner portion 42 are equal.

(7) In the above embodiment, the resin sleeve structure 38 is described as an example in which the inner diameter D1 of the outer cylinder 41 is smaller than the nominal diameter D2 of the screw 39, but the present invention is not limited thereto. For example, in the resin sleeve structure 38, the cylinder inner diameter D1 of the outer cylinder 41 may be the same as the nominal diameter D2 of the screw 39 or larger than the nominal diameter D2 of the screw 39. In this case, since the screw 39 engages with the inner surface of the outer tube 41, the fastening force can be increased.

(8) In the above embodiment, the resin sleeve structure 38 is provided on the back surface of the plate-like portion 43 of the signboard member 16, but the present invention is not limited thereto. For example, the label member 16 of the "rice cooker" may be provided as a resin molded product integrally molded therewith. In addition to the "rice cooker", the resin sleeve structure 38 may be applied to a part of other heating kitchenware such as an electric kettle, a hot plate, and a toaster. In the thin resin molded article constituting a part of the outer cover material E, such a resin sleeve structure 38 can be suitably applied to a portion where sink marks are not desired to be generated in a surface portion showing an appearance.

(9) In the above-described embodiment, the screw 39 is exemplified as the "male screw member", but the present invention is not limited thereto. For example, other "male screw members" such as screws or bolts may be used.

(10) In the above embodiment, the pressure cooker 1 includes the rice-water returning surface 51 sloping downward from the rice-water separating means 25 toward the pressure regulating unit 29 as the portion constituting the steam path P, but the present invention is not limited thereto. For example, the rice water returning noodles 51 may not be included.

(11) In the above embodiment, the vesiculated member 68 having a substantially T-shaped cross-section in side view is illustrated, but is not limited thereto. For example, another structure of the vesiculated member 168 as shown in fig. 21-23 is also possible. The vesiculated member 168 is mounted with a pair of guide shaft portions 188. The bubbling member 168 also has an inflow prevention function of preventing the steam flow from flowing from the return hole 59 into the gas-liquid separation space S2. In another structure shown in fig. 21 to 23, the size of the introduction hole 158 becomes larger as compared with the embodiment. A cantilever-shaped valve body 201 is provided in the middle of the cylindrical portion 200 through which the steam flow of the foaming member 168 passes, and the valve body 201 is moved as fluttering as hitting the steam flow at the time of cooking, breaking the rice water bubbles introduced into the gas-liquid separation space S2, and thus foaming the rice water bubbles. That is, in the other structure, the bubbling member 168 is also configured to be pushed by the steam flow to change the state, thereby reducing the size of the rice water bubbles.

(12) In the above embodiment, the vesiculated member 68 is shown as including an elastic material, but is not limited thereto. For example, the vesiculated member 68 may also comprise a non-elastic material such as a hard resin.

(13) In the above embodiment, the example in which the inflow prevention member 72 includes the elastic material is shown, but the present invention is not limited thereto. For example, the inflow prevention member 72 may include a non-elastic material such as a hard resin.

(14) In the above embodiment, the rice-water separating means 25 is shown as an example of being detachable from the lid 15, but is not limited thereto. For example, the rice water separating means 25 may be formed integrally with the lid 15 so as not to be detachable.

(15) In the above embodiment, the heating system is the IH system as an example of the "rice cooker", but the present invention is not limited to this. For example, a "rice cooker" may be used in which the heating system is a sheath heater (sheath heater) system or a gas system.

(16) In the above-described embodiment, the pressure type rice cooker 1 is exemplified as an example of the "rice cooker", but the present invention is not limited thereto. For example, a normal rice cooker may be used which does not apply a pressure higher than atmospheric pressure.

Claims (6)

1. A resin sleeve structure which is screwed into a male screw member to fix another member, comprising:

an outer cylinder portion capable of supporting a screw shaft portion of the male screw member; and

an inner portion integrally formed inside the outer tube portion; and is

The inner portion is provided with a plurality of engaging portions that engage with the male screw member, and a gap portion that is formed between the plurality of engaging portions in the circumferential direction.

2. The resin sleeve structure according to claim 1,

the plurality of gap portions are provided at equal intervals in the circumferential direction.

3. The resin sleeve structure according to claim 1 or 2,

the inner diameter of the outer cylinder portion is larger than the nominal diameter of the male screw member.

4. The resin sleeve structure according to claim 1 or 2,

the engaging portion is formed so as to increase in width in the circumferential direction from the radially inner side toward the radially outer side.

5. The resin sleeve structure according to claim 3,

the engaging portion is formed so as to increase in width in the circumferential direction from the radially inner side toward the radially outer side.

6. A resin molded article characterized in that,

the resin sleeve structure according to any one of claims 1 to 5 is integrally formed on a back surface of a plate-shaped portion to be an outer covering material.

Images