JP2002104463A - Lid opening or closing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a positional displacement of an outer lid of a lid opening or closing structure accompanied by an opening or closing operation of the outer lid in respect to the outer barrel of a rice cooker, for example, and further eliminate looseness caused by inclination of the lid to improve convenience in use of the lid opening or closing structure. SOLUTION: There is provided an opening or closing hinge section D for an outer lid A in respect to an outer barrel B. A flat surface section 18 installed at a fixing section 8 for the outer lid A is provided with protrusions 22, 22 for use in press contacting and holding operation. Central sections of the press contacting and holding protrusions 22, 22 are fastened by a fitting small screw 9 to a flat surface section 19 at a base end side of a fixing seat 1 of a hinge fitting D placed at an opposite side, thereby the press contacting and holding protrusions 22, 22 placed at equal both side positions of the fitting small screw 9 are brought into contact with the flat surface section 19 of the hinge section D or the hinge fitting and the outer lid A is held against the outer barrel B through the hinge fitting D without any looseness at all.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid opening / closing structure, and more particularly to a lid mounting / closing hinge portion for a rice cooker or other equipment having a lid.

[0002]

2. Description of the Related Art Conventionally, for example, as shown in FIG. 15, an outer lid A is attached to an outer trunk of a rice cooker. The outer lid-side mounting portion 8 of the portion D has a structure in which it is mounted at the center thereof only with two stop screws 9 and 10 which are vertically arranged and screwed.

[0003]

However, in the above-mentioned conventional mounting structure, the outer lid (including the inner lid) is supported only by supporting one point in the circumferential direction of the outer lid with two vertical fixing screws. Due to lack of consistency with the weight, there is a large displacement (vibration) to the left and right with the rear mounting part of the outer lid as a fulcrum relative to the outer trunk, and a large inclination (twist) of the outer lid with respect to the outer trunk. As a result, the positional relationship between the outer trunk and the outer lid due to the opening and closing of the outer lid occurs, and the front end catcher cannot always be accurately and lightly engaged and lacks stability. It was inconvenient to use. Therefore, as a countermeasure, three screws (one on the tip side and two on the base side located at the apex of the triangle) can be considered. However, not only the number of parts is increased, but also the labor for assembling is increased. It has problems and lacks practicality. The lid opening / closing structure according to the present invention solves the above-mentioned problem, and eliminates the displacement and inclination of the lid (outer lid) with respect to the main body (outer trunk) while maintaining the two screws as in the prior art, thereby improving the usability. It aims to provide an opening and closing structure.

[0004]

According to a first aspect of the present invention, there is provided a lid opening / closing structure for opening / closing a hinge of a lid with respect to a main body. The gist of the present invention is to provide a pressure contact holding means for preventing displacement and inclination of the lid with respect to the main body.

According to a second aspect of the present invention, there is provided a lid opening / closing structure according to the first aspect of the present invention, wherein a flat portion is provided on a mounting portion of the lid or hinge fitting, and the flat portion is opposed to the flat portion. At the same position on both sides of the screw stop on the side, a convex portion for holding the pressure contact is provided. By tightening the screw stop portion, the convex portion for holding the pressure contact on both sides presses against the flat portion on the opposite side, and the lid is pressed against the main body. Is a press-contact holding means that is held without rattling.

According to a third aspect of the present invention, there is provided a lid opening and closing structure according to the first and second aspects of the present invention, wherein the press-contact holding projection has an oblong or rectangular planar shape in plan view. The gist of the present invention is that the shape is formed in a convex shape which is in pressure contact with the flat portion on the opposite side under line or surface contact.

According to a fourth aspect of the present invention, there is provided a lid opening / closing structure according to the first and second aspects of the present invention, wherein the press-contact holding projection has a plane shape of a circle, a regular triangle, or a regular triangle. The gist is that it is formed in a quadrangular shape or another shape having a convex shape which is pressed against a flat portion on the opposite side under point or surface contact.

The lid opening / closing structure according to the first aspect of the present invention having the above structure, in the opening / closing hinge portion of the lid with respect to the main body, there is no play of the lid at the mounting portion of the lid and the hinge fitting, and the position of the lid with respect to the main body. Equipped with press-contact holding means to prevent displacement and inclination, the two screws are kept intact as before to prevent displacement and inclination of the lid with respect to the main body, so the positional relationship between the main body and the lid due to opening and closing of the lid Can always be kept stable. As a result, the rattle of the lid is eliminated and the usability is remarkably improved.

In the lid opening / closing structure according to a second aspect of the present invention having the above structure, a flat portion is provided as the press-contact holding means on a mounting portion of the lid or the hinge fitting, and a screw fixing portion on the opposite side of the flat portion is provided. A convex portion for holding the pressure contact is provided at an equal position on both sides, and the central screw fixing portion is screwed so that the convex portions for pressing and holding on both sides press against the flat portion on the opposite side, so that the lid does not rattle against the main body. So that both sides of the screw stop are firmly held by the press-contact holding projections, and the displacement and inclination of the lid with respect to the main body can be reliably eliminated even with only two screw stops as in the past. be able to. As a result, the positional relationship between the main body and the lid accompanying the opening and closing of the lid is stabilized. In addition, it is desirable to provide the press-contact holding projections at equal positions on both sides of the base-side screw stopper. This is because an effect equal to or more than that of the stable mounting by the three screws can be obtained.

In the lid opening / closing structure according to a third aspect of the present invention having the above-mentioned structure, the pressure contact holding projection has a plane ellipse, a rectangle, or another shape and has a line or a surface contact with the flat part on the opposite side. Since it is formed in the shape of a convex portion that is pressed against, the pressure contact holding convex portion against the flat portion provided on the mounting portion of the lid or the hinge fitting is firmly and reliably performed, and the mounting portion of the lid and The hinge fitting is attached to the lid-side mounting portion by a press-contact-holding convex portion with a slight gap therebetween by screwing at the center and pressing by the convex portions on both sides thereof. As a result, the lid does not rattle, and the positional relationship between the main body and the lid is always kept stable.
If the contact surface of the press-contact holding projection is formed in an arc shape, a mountain shape, or the like, the contact surface is pressed against the flat portion on the opposite side with a line contact, and the contact surface of the press-contact holding projection is formed in a planar shape. In this case, it is pressed against the flat portion on the opposite side with surface contact.

In the lid opening / closing structure according to a fourth aspect of the present invention having the above structure, the pressure contact holding projection has a circular shape, an equilateral triangle, an equilateral square or other shapes, and a point or surface contact with the opposing planar portion. Since it is originally formed in the shape of a convex portion that is pressed against, the pressure contact holding convex portion against the flat portion provided on the mounting portion of the lid or the hinge fitting is firmly and reliably pressed, and the lid is attached. The part and the mounting part on the lid side of the hinge fitting are mounted by pressing the central screw and pressing by the convex parts on both sides thereof with a slight gap at the convex part for holding pressure. As a result, the lid does not rattle, and the positional relationship between the main body and the lid is always kept stable. In addition, the contact surface of the press-contact holding projection is semicircular,
If it is formed in a conical shape, a pyramid shape, or the like, it is pressed against the flat portion on the opposite side with point contact, and if the contact surface of the press-contact holding projection is formed in a flat shape, the flat surface portion faces the flat portion on the opposite side. They are pressed in contact with each other.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the structure and operation of the present invention described above, an example of a preferred embodiment of a lid opening / closing structure of the present invention will be described below with reference to the drawings. In the embodiment, as an example, the lid opening and closing structure of the present invention is applied to a hinge portion between an outer trunk as a main body of a rice cooker and an outer lid as a lid. In the following description, the same parts as those of the conventional example shown in FIG.

In FIG. 1 to FIG. 14, A is an outer lid of the rice cooker, which is connected to the outer shell B at one point in the circumferential direction by a hinge D, and the outer lid A is connected to the outer shell B. With the hinge D as a fulcrum, it can be opened and closed in the vertical direction by about 90 degrees or more. E is the outer lid A
An outer cover side mounting portion of a catcher (not shown) which is disengaged when opening and closing is provided on the opposite side (opposite side) of the outer cover side mounting portion 8 of the hinge fitting D (see FIGS. 13 and 14). This catcher has a one-push open mechanism in which the outer lid A is automatically opened just by pressing the operation knob.

The hinge fitting D has an outer lid side mounting seat 1 and an outer trunk side mounting seat 2 rotatably connected via a pivot 3, and is mounted on the pivot 3, and one end 5a is attached to the outer lid side. The other end 5b is urged in the direction in which the outer cover A is always opened by the torsion springs 5 supported on the engaging piece 3a provided on the seat 1 and the other end 5b by the engaging piece 4 provided on the outer body side mounting seat 2. In addition, the engagement pieces 7 provided on both sides of the base end of the outer lid side mounting seat 1 are engaged with the stoppers 6 provided on both sides of the distal end of the outer shell side mounting seat 2, so that the outer body B The fully open position of the lid A is regulated to a fixed position. The mounting seat 1 on the outer lid side is bent in a V-shape at the distal end side 1a and the base end side 1b, and the mounting seat 1 is attached to the hinge fitting mounting portion 8 of the outer lid A formed so that the mounting seat 1 is adapted. And the center portion thereof is tightened and fixed by two screws 9 and 10. The outer seat side mounting seat 2 is a flat plate shape adapted to the outer surface shape of the outer shell B, and is an outer portion which is a hinge fitting mounting portion. It comes into contact with the trunk side (outer trunk outer surface) 11 and is attached and fixed by two bolts and nuts 12 and 13. The outer body 11 is mounted integrally with bolts, nuts 12, 13 together with the mounting portion 15 of the upper cover 14 and the holding plate 17 of the heat insulating material 16 inside the outer body.

A flat portion 18 is provided on the base end side of the hinge fitting mounting portion 8 of the outer lid A, and a flat portion substantially matching the flat portion 18 is provided on the base end 1b of the outer lid side mounting seat 1 of the hinge fitting D. 19, and a mounting flat portion 20 is provided on the distal end side of the hinge fitting mounting portion 8 of the outer lid A so that the distal end 1a of the outer lid side mounting seat 1 of the hinge fitting D abuts. The flat portion 19 on the base end 1b of the mounting seat 1 is brought into contact with the base flat portion 18 of the mounting portion 8 on the outer lid side and tightened with screws 9 from the inside of the outer lid A. The distal end 1a of the mounting seat 1 comes into contact with the mounting flat portion 20 of the outer lid mounting portion 8 and is tightened with screws 10 from the inside of the outer lid A. Outer lid A is hinged bracket D
Can be rotated (opened / closed) via the outer lid side mounting seat 1.

The flat portion 18 provided on the base end side of the hinge fitting mounting portion 8 of the outer lid A is provided with convex portions 22, 22 for press-contact holding at equal positions on both sides of a center screw insertion hole 21. At the time of the above attachment to the convex portions 22 on both sides, the flat portion 19 provided on the base end side 1b of the outer lid side mounting seat 1 of the hinge fitting D abuts, and the screw 9 is inserted from the inside of the outer lid A. Hole 2
1 and screwed into the central screw hole 23 of the base-side flat portion 19 of the mounting seat 1 to tighten the protrusions 22 on both sides.
2 is pressed against the base-side flat portion 19 of the outer lid-side mounting seat 1 of the opposing hinge fitting D and held in pressure contact, so that the outer lid A is pressed against the outer shell B by the central screwing and the convex portions on both sides thereof. It is held so that there is no backlash by the pressure contact holding structure consisting of holding. Therefore, the hinge fitting D is held at the three vertices of the triangle in combination with the tightening of the screw 10 to the mounting flat portion 20 on the tip side 1a of the outer lid mounting seat 1 of the outer lid side. The lid A is firmly and securely attached and fixed at a predetermined position. Reference numeral 24 denotes an insertion hole for the screw 10 to be screwed from the inside of the outer lid A into a screw hole 25 on the distal end side 1a of the outer lid side mounting seat 1 of the hinge fitting D, and is located at the center of the mounting flat portion 20 of the outer lid side mounting portion 8. The part is pierced.
Reference numeral 26 denotes a lower cover that is freely attached to and detached from the lower portion of the upper cover 14, and 27 denotes a cover that covers the upper surface of the hinge D so that it can be freely attached and detached. 28 is the cover 27
Screw holes.

As shown in FIGS. 1 to 6, for example, the convex portions 22 for holding the pressure contact are formed into a convex shape having an oblong planar shape and a semicircular cross-sectional shape. When formed, the convex portions 22 for holding the pressure contact are pressed against the flat portion 19 on the opposite side under line contact, and as illustrated in FIGS. 7 to 9, the planar shape is circular, When the cross-sectional shape is formed in a semicircular convex shape, the convex portions 22 for holding the pressure contact are pressed against the flat portion 19 on the opposite side under point contact. As illustrated in FIG. 10, when the cross-sectional shape is a trapezoidal convex shape, even if the planar shape is an ellipse or a circle, the press-contact holding convex portions 22 and 22 are opposed to the planar portion 19 on the opposite side. Is pressed in contact with the surface. Further, as illustrated in FIGS. 11 and 12, the convex portions 22 for holding the press-contact are provided on the base end side 1 b of the outer lid-side mounting seat 1 of the hinge fitting D.
And the base flat portion 18 of the hinge fitting mounting portion 8 of the outer lid A.
The protrusions 22, 22 may be attracted and pressed and held by screwing around the center of the protrusion.

In the above structure, the convex portion 2 for holding the press-contact provided on the base end flat portion 18 of the hinge fitting mounting portion 8 of the outer lid A is provided.
The base plate portion 19 of the outer lid side mounting seat 1 of the hinge D is brought into contact with the second and second hinge fittings D and the screw 9 is inserted into the insertion hole 21 at the center of the convex portion.
When the screw is inserted into the screw hole 23 of the base flat portion 19 of the outer lid side mounting seat 1 of the hinge fitting D and tightened by pressing from the inside of the hinge fitting D, the pressing contact holding projections 22 on both sides are pressed by the center tightening force c. The pressures a, a are generated, and the outer lid-side convex portions 22, 22 are located between the outer lid-side flat portion 18 and the hinge metal-side flat portion 19 with respect to the hinge fitting-side base flat surface portion 19. , 22 with a certain gap b (see FIGS. 6 and 9). Therefore, by screwing the center screw fixing portion, the convex portions 22 for holding the press-contact at equal positions on both sides thereof,
22 is pressed against the flat portion 19 on the opposite side, the outer cover A is held against the outer shell B via the hinge fitting D without rattling, and the outer shell B and the outer lid A maintain a predetermined positional relationship. And can be firmly and securely attached.

Although an example of the embodiment of the present invention has been described above, the present invention is not limited to the embodiment, and may be implemented in various forms without departing from the gist of the present invention. Of course. For example, in the embodiment, the present invention is applied to the hinge between the outer trunk and the outer lid of the rice cooker, but the present invention is also applicable to the main body of other lidded devices and the hinge of the lid. In the embodiment, both the base end of the hinge fitting attachment portion 8 of the outer lid A and the base end of the outer lid side mounting seat 1 of the hinge fitting D are flat portions 18 and 19.
However, only the side where the pressure contact holding projections 22 and 22 are pressed may be formed in a flat portion, and the shape of the pressure contact holding projections 22 and 22 is not limited to that of the embodiment. Of course not. Further, the same operation and effect can be obtained by providing the press-contact holding projection on the distal end side 20, 1a of the outer lid or the hinge fitting.

[0020]

The present invention is embodied in the form described above, and has the following effects.

According to the lid opening / closing structure of the present invention, the protrusion for holding the pressure contact is provided at equal positions on both sides of the center screw fixing portion of the attaching portion of the lid and the hinge fitting in the hinge portion for opening / closing the lid with respect to the main body. Since the support system is adopted, even if the two screws are kept intact as before, the displacement and inclination of the lid with respect to the main body are surely prevented, so that there is no rattling of the lid, and the main body and the lid accompanying the opening and closing of the lid And the positional relationship with is always kept stable. Therefore, it is possible to provide a user-friendly device capable of always opening and closing the lid stably, for example, a rice cooker and other devices with a lid.

Further, since the pressure contact holding protrusion is formed in a shape of a protrusion which is pressed against a flat portion on the opposite side with a point, a line or a surface contact, the mounting portion of the outer lid or the hinge fitting is provided. The press-contact holding projections are firmly and reliably pressed against the flat portion provided in the first portion. Therefore, the positional relationship between the main body and the lid is always kept stable.

Further, as in the conventional case, the two screw stoppers are maintained as they are, and convex portions for holding the pressure contact are provided at equal positions on both sides of the center screw stopper portion in the lid-side mounting portion by press working or the like. The cost is very low in combination with the simple structure.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of only a main part when an outer lid is closed, showing a case where the present invention is applied to a hinge portion between an outer shell and an outer lid of a rice cooker as an example of a lid opening / closing structure of the present invention.

FIG. 2 is a sectional view of only a main part when the outer lid is opened.

FIG. 3 is a rear view showing a relationship between the outer lid and a hinge when the outer lid is opened.

FIG. 4 is a plan view of a main part of only an outer lid.

FIG. 5 is an enlarged sectional view taken along line XX of FIG. 4;

FIG. 6 is an enlarged sectional view taken along line YY of FIG. 4;

FIG. 7 is a plan view of a main portion of only an outer lid having a different shape of a convex portion.

FIG. 8 is an enlarged sectional view taken along line XX of FIG. 7;

FIG. 9 is an enlarged sectional view taken along line YY of FIG. 7;

FIG. 10 is a partial cross-sectional view of an outer lid having a different shape of a convex portion.

FIG. 11 is a partially longitudinal side view showing an example in which a convex portion is formed on the hinge side.

FIG. 12 is a vertical sectional front view of the same part.

FIG. 13 is an overall plan view of only the outer lid.

FIG. 14 is a rear view of the same.

FIG. 15 is a rear view of the conventional example when the outer lid is opened.

[Explanation of symbols]

 A: Outer lid B: Outer trunk D: Hinge fitting 1 ... Outer lid side mounting seat 2 ... Outer trunk side mounting seat 3 ... Axis 5 ... Torsion spring 8 ... Outer lid mounting part 9 ... Stop screw 10 ... Stop screw 12: bolt, nut 13: bolt, nut 18: flat portion on outer lid side 19: flat portion on hinge fitting side 22: convex portion for press-contact holding

Claims (4)

[Claims] 1. A hinge for opening and closing a lid with respect to a main body, comprising: a press-contact holding means for preventing the lid from rattling and preventing the lid from being displaced and tilted with respect to the main body at a mounting portion between the lid and the hinge fitting. The lid opening and closing structure. 2. A flat portion is provided on a mounting portion of the lid or the hinge fitting, and a convex portion for press-contact holding is provided at an equal position on both sides of a screw stop portion on the opposite side of the flat portion, and the screw stop portion is screwed. 2. The pressing and holding means, wherein the pressing and holding projections on both sides are pressed against the flat portion on the opposite side to hold the lid against the main body without rattling.
Lid opening and closing structure as described. 3. The press-contact holding projection has an oval, rectangular, or other planar shape and is formed into a convex shape that presses against the opposing flat surface under line or surface contact. 1,
2. The lid opening and closing structure according to 2. 4. The pressure-contact holding projection is formed in a shape of a circle, an equilateral triangle, an equilateral square, or any other shape, and is in the shape of a projection that press-contacts a flat portion on the opposite side under point or surface contact. 3. The lid opening / closing structure according to claim 1, wherein: