Heating cooker

Abstract

Provided is a heating cooker. A heating cooker according to the present disclosure includes a housing, a heating chamber, a door, a hinge portion, a door arm, a spring, and a roller. The heating chamber is disposed within the housing and has a front surface opening. The door covers the front surface opening of the heating chamber in an openable and closable manner. The hinge part is arranged on the lower edge part of the door. The door arm is combined with the door. The spring is clamped with one end of the door arm and drags the door through the door arm. The roller is in contact with the door arm and guides the door arm while rotating when the door is opened and closed. The roller has a groove provided on the outer periphery of the roller. The door arm has an annular portion provided so as to surround the roller. In the moving process of the door arm, the inner periphery of the annular part of the door arm is always in local contact with the bottom surface of the groove of the roller.

Description

Technical Field

[0001] This disclosure relates to a heating cooker with door arms. Background Technology

[0002] In existing heating cookers, there exists a heating cooker with the following structure: a force is applied in the direction of closing the door by a combination of a tension spring, a door arm, and a roller, causing the door arm to slide on the roller while in contact with it. The tension spring keeps the door arm in contact with the roller when the door is closed, and keeps the door open when it is fully open (for example, see Japanese Patent Application Publication No. 2002-250522). Summary of the Invention

[0003] In the aforementioned conventional heating cookers, there is room for improvement in ensuring stable operation of the door arm and rollers. The object of this disclosure is to provide a heating cooker capable of stable operation of the door arm and rollers.

[0004] The disclosed heating cooker includes a housing, a heating chamber, a door, a hinge, a door arm, a spring, and a roller. The heating chamber is disposed within the housing and has a front surface opening. The door opens and closes freely, covering the front surface opening of the heating chamber. The hinge is located at the lower edge of the door. The door arm is attached to the door. The spring engages with one end of the door arm, pulling the door via the door arm. The roller contacts the door arm and guides the door arm while it rotates during door opening and closing. The roller has a groove on its outer periphery. The door arm has an annular portion arranged to surround the roller. During movement of the door arm, the inner periphery of the annular portion of the door arm is always in partial contact with the bottom surface of the groove of the roller.

[0005] The heating cooker disclosed herein can open or close the door stably and smoothly using the door arm and rollers, and can prevent extreme tilting and extreme shaking of the door arm. Attached Figure Description

[0006] Figure 1 This is a perspective view showing the appearance of a heating cooker according to an embodiment of the present disclosure.

[0007] Figure 2 This is a perspective view of the heated cooker in the embodiment with the door open.

[0008] Figure 3 This is a perspective view of the heating cooker in the embodiment with the outer casing removed.

[0009] Figure 4 This is a right-side view of the heating cooker in the embodiment with the outer casing removed and the door fully closed.

[0010] Figure 5 This is a right-side view of the heating cooker in the embodiment with the outer casing removed and the door opened to about 30 degrees.

[0011] Figure 6 This is a right-side view of the heating cooker in the embodiment with the outer casing removed and the door opened to about 60 degrees.

[0012] Figure 7 This is a right-side view of the heating cooker in the embodiment with the outer casing removed and the door fully open.

[0013] Figure 8 This is a partial sectional perspective view of the door opening and closing mechanism of the heating cooker, as observed from the rear with the door open at approximately 60 degrees.

[0014] Figure 9A yes Figure 7 A magnified view of a section near the gate arm.

[0015] Figure 9B yes Figure 6 A magnified view of a section near the gate arm.

[0016] Figure 9C yes Figure 5 A magnified view of a section near the gate arm.

[0017] Figure 9D yes Figure 4 A magnified view of a section near the gate arm. Detailed Implementation

[0018] The heating cooker of the first aspect of this disclosure includes a housing, a heating chamber, a door, a hinge, a door arm, a spring, and a roller. The heating chamber is disposed within the housing and has a front surface opening. The door opens and closes flexibly over the front surface opening of the heating chamber. The hinge is located at the lower edge of the door. The door arm is attached to the door. The spring engages with one end of the door arm, pulling the door via the door arm. The roller contacts the door arm and guides the door arm while it rotates during door opening and closing. The roller has a groove on its outer periphery. The door arm has an annular portion arranged to surround the roller. During movement of the door arm, the inner periphery of the annular portion of the door arm is always in partial contact with the bottom surface of the groove of the roller.

[0019] Therefore, the door can be opened or closed stably and smoothly using the door arm and rollers, preventing extreme tilting and shaking of the door arm.

[0020] The second type of heating cooker disclosed herein, based on the first type, has a door arm configured such that, during the movement of the door from a fully closed state to a fully open state, the inner circumference of the annular portion contacts the bottom surface of the groove of the roller at the upper part of the annular portion, and the inner circumference of the annular portion does not contact the bottom surface of the groove of the roller at the lower part of the annular portion.

[0021] According to this method, the door can be opened or closed stably and smoothly using the door arm and rollers, and extreme tilting and shaking of the door arm can be prevented.

[0022] In this third-party heating cooker, based on the first or second method, during the movement of the door arm, the side of one or both of the upper and lower portions of the annular part partially contacts the side of the groove of the roller.

[0023] According to this method, the door can be opened or closed stably and smoothly using the door arm and rollers, and extreme tilting and shaking of the door arm can be prevented.

[0024] (Implementation Method)

[0025] [Structure of the main body and heating source of the heating cooker]

[0026] Hereinafter, the heating cooker 100 according to an embodiment of the present disclosure will be described with reference to the accompanying drawings. Figure 1 This is a perspective view showing the appearance of the heating cooker 100. Figure 2 This is a 3D view of the heated cooker 100 with its door 2 open.

[0027] In this embodiment, as shown in the accompanying drawings, the door 2 side of the main body of the heating cooker 100 is defined as the front of the heating cooker 100, and the opposite side is defined as the rear of the heating cooker 100. The left and right sides when viewing the heating cooker 100 from the front are defined as the left and right sides of the heating cooker 100, respectively.

[0028] like Figure 1 and Figure 2 As shown, the heating cooker 100 has a heating chamber 4 disposed inside the outer shell 1 of the main body of the heating cooker 100. The heating chamber 4 has a front surface opening 4b disposed on its front surface. The main body of the heating cooker 100 has a door 2 that can be opened and closed to cover the front surface opening 4b.

[0029] In this embodiment, door 2 is a so-called longitudinally opening door with a handle 3 provided on its upper part. The interior of heating chamber 4 is substantially sealed by closing door 2, and food, as the object to be heated, is heated and cooked inside heating chamber 4.

[0030] like Figure 1 As shown, a setting section 5 is provided on the front surface of the heating cooker 100, i.e., the front surface of the door 2. The setting section 5 has a rotary knob and buttons for setting various cooking conditions such as temperature and time. Furthermore, the setting section 5 has a display section that displays the set cooking conditions and the status of the heated object during cooking.

[0031] Figure 3This is a perspective view of the heating cooker 100 with the outer casing 1 removed. (See image below.) Figure 3 As shown, the heating cooker 100 includes an upper heater (planar heater unit 8), a lower heater (not shown), and a microwave heating unit (not shown) for heating the object by means of microwaves.

[0032] Alternatively, the heating cooker 100 may also have one or both of the following: a steam heating unit (not shown) that uses steam to heat the object being heated, and a hot air circulation unit (not shown) that uses hot air circulating in the heating chamber 4 to heat the object being heated.

[0033] The lower heater is a sheathed heater with a coiled nickel-chromium alloy wire serving as the heating element passing through a metal tube, and is located below the bottom wall 4a of the heating chamber 4. The lower heater can also be a tubular lamp heater that emits infrared rays.

[0034] A mechanical chamber (not shown) is provided in the space between the bottom wall 4a of the heating chamber 4 and the base plate 7 of the main body of the heating cooker 100. The mechanical chamber is equipped with a control unit, a magnetron, an inverter board, a cooling fan unit (all not shown), etc.

[0035] The magnetron is a key component of the microwave heating unit. The inverter board includes the inverter circuitry that drives the magnetron. The control unit controls the inverter board, as well as the upper and lower heaters. The cooling fan unit generates cooling air to cool the interior of the machine chamber. The machine chamber also functions as an insulated space. The microwave heating unit also has a radiating antenna (not shown) below the bottom wall 4a of the heating chamber 4, which radiates microwaves into the heating chamber 4.

[0036] The steam heating unit has a water tank and a boiler that heats the water from the water tank to generate steam, which is then injected into the heating chamber 4. The hot air circulation unit has a rear heater and a circulating fan located behind the heating chamber 4, which draws air from the heating chamber 4 and supplies hot air generated by heating the air to the heating chamber 4.

[0037] As described above, the heating cooker 100 has multiple heating sources. The user selects at least one suitable heating source from these multiple sources by choosing the desired heating source or the desired cooking content. The user places the object to be heated inside the heating chamber 4 and closes the door 2, sets the heating source, cooking content, etc., in the setting unit 5, and presses the start button to begin the cooking process.

[0038] like Figure 2As shown, the heating cooker 100 can house a heating plate 6 for heating a placed object inside a heating chamber 4. The heating plate 6 is disposed inside the heating chamber 4, and its left and right edges are supported on either of a multi-layered support frame respectively provided on the left and right side walls of the heating chamber 4. A heating element (not shown) is disposed on the mounting surface of the heating plate 6. The heating element is, for example, made of ferrite, and heats up by absorbing microwaves.

[0039] Furthermore, the heating element can be any structure that absorbs microwaves to generate heat, and is not limited to ferrite. The heating element can be coated on the back of the heating plate 6. The main material of the heating plate 6 can be any material with excellent thermal conductivity, such as metal or ceramic.

[0040] Alternatively, the heating plate 6 can be suspended from the top wall of the heating chamber 4 and disposed inside the heating chamber 4. The heating plate 6 can also be placed on the bottom wall 4a of the heating chamber 4, with four feet located at the four corners of the heating plate 6 and protruding downwards.

[0041] The radiating antenna is positioned approximately below the center of the bottom wall 4a of the heating chamber 4. The radiating antenna is directional in the direction of microwave radiation. The microwave heating unit has a rotating mechanism (not shown) that enables the radiating antenna to rotate so that its radiating aperture faces a desired direction on the horizontal plane.

[0042] In addition, the radiating antenna has a radiating port on its upper part for radiating circularly polarized microwaves upwards. The object to be heated, placed on the bottom wall 4a of the heating chamber 4, is uniformly heated by microwaves radiated from the radiating antenna and supplied into the heating chamber 4 via the bottom wall 4a.

[0043] The bottom wall 4a of the heating chamber 4 is made of a material (e.g., ceramic) that allows microwaves from the radiating antenna to pass through. The side walls, back wall, and top wall of the heating chamber 4 are made of aluminized steel sheets made of steel or stainless steel (SUS).

[0044] Each wall surface of the heating chamber 4 may have a non-adhesive coating layer, such as fluororesin or silicone resin. Such a coating layer can prevent the adhesion of grease, cooking residue, and other dirt that splatters during cooking. In addition, even if dirt adheres, it can be easily wiped away.

[0045] Furthermore, each wall of the heating chamber 4 may also have a covering layer, which has a self-cleaning function that uses the heat during cooking to decompose and automatically clean up the oil components that fly out during cooking.

[0046] To enable the coating layer to have self-cleaning properties, catalysts such as manganese oxide-based catalysts that promote oxidative decomposition can be incorporated into the coating layer. Alternatively, platinum, which exhibits significant effects on oxidative decomposition at low temperatures, or palladium, which has high activity in the medium to high temperature range, can be added to the coating layer. Furthermore, cerium, which has adsorption properties, can also be added to the coating layer.

[0047] In this embodiment, the object to be heated, placed inside the heating plate 6 housed within the heating chamber 4, is heated by receiving microwaves through the heating element of the heating plate 6. Additionally, a planar heater unit 8 heats the object placed on the heating plate 6 from above. Furthermore, a lower heater heats the object placed on the bottom wall 4a from below.

[0048] like Figure 3 As shown, the portion of the planar heater unit 8 located on the top side of the housing 1 includes the top wall of the heating chamber 4.

[0049] The heating cooker 100 also includes an indoor temperature detection unit 9 for detecting the indoor temperature inside the heating chamber 4. The indoor temperature detection unit 9 is, for example, a thermistor, and is located near the upper right corner of the heating chamber 4. The indoor temperature information detected by the indoor temperature detection unit 9 is transmitted to a control unit (not shown).

[0050] In addition, the indoor temperature detection unit 9 is not limited to being located near the upper right corner of the heating chamber 4; it can be located anywhere that can detect the indoor temperature.

[0051] [Structure around the portal arm]

[0052] Figure 4 This is a right-side view of the heating cooker 100 with the outer casing 1 removed and the door 2 fully closed (hereinafter referred to as the fully closed door state). Figure 5 This is a right-side view of the heating cooker 100 with the outer casing 1 removed and the door opened to about 30 degrees.

[0053] Figure 6 This is a right-side view of the heating cooker 100 with the outer casing 1 removed and the door opened to about 60 degrees. Figure 7 This is a right-side view of the heating cooker 100 with the outer casing 1 removed and the door 2 fully opened (hereinafter referred to as the open door 2 state).

[0054] like Figures 3-7 As shown, the door 2 has a hinge portion 10 located at its lower part. The hinge portion 10 is mounted on a metal plate that protrudes forward from the front of the main body of the heating cooker 100.

[0055] Thus, the door 2 is supported by the hinge portion 10 and combined with the main body of the heating cooker 100. When the user holds the handle 3 and pulls or presses the handle 3, the door 2 rotates around the rotation axis extending in the left and right direction as defined by the hinge portion 10, opening and closing the opening 4b on the front surface of the heating chamber 4 in the up and down direction.

[0056] The heating cooker 100 includes a door opening and closing mechanism 50 for smoothly opening and closing the door 2. The door opening and closing mechanism 50 is disposed in the space between the outer casing 1 and the heating chamber 4 at the rear right corner of the door 2. The door opening and closing mechanism 50 includes a door arm 11, a spring 12, and a roller 13. Furthermore, the door opening and closing mechanism 50 is also disposed in the space between the outer casing 1 and the heating chamber 4 at the lower left corner of the door 2 (see reference). Figure 2 ).

[0057] One end of spring 12 engages with the base plate 7, and the other end of spring 12 engages with one end of door arm 11. The other end of door arm 11 engages with door 2. Thus, door arm 11 and spring 12 are mounted between door 2 and base plate 7, arranged along the outer wall of heating chamber 4. Spring 12 exerts its tension on door 2 backward via door arm 11.

[0058] When door 2 is opened, door arm 11 moves forward in conjunction with the movement of door 2, and spring 12 extends. When door 2 is closed, door arm 11 moves backward in conjunction with the movement of door 2, and spring 12 contracts.

[0059] Roller 13 is mounted on the outer wall of heating chamber 4. Roller 13 has a central axis extending in the left-right direction and is a cylindrical component capable of rotating around this central axis. Door arm 11 has a horizontally elongated annular portion. Roller 13 is inserted into the annular portion of door arm 11.

[0060] The inner circumference of the annular portion of the door arm 11 (see below) Figure 8 The inner periphery 11a) shown is always in partial contact with the outer periphery of the roller 13. The outer periphery of the roller 13 refers to the portion of the roller 13 that corresponds to the side surface of the cylindrical roller 13. The roller 13 guides the door arm 11 by rotating in conjunction with the movement of the door 2.

[0061] Since the inner circumference of the annular portion of the door arm 11 is always in contact with the outer circumference of the roller 13, when the user opens the door 2, the roller 13 moves in conjunction with the movement of the door 2. Figure 5 The roller 13 rotates counterclockwise. This guides the door arm 11 forward. When the user closes the door 2, the roller 13 moves in conjunction with the door 2. Figure 5 The roller 13 rotates clockwise, thus guiding the door arm 11 backward.

[0062] When the user opens door 2, which is in the closed state, door 2 follows... Figure 7 , Figure 6 , Figure 5 , Figure 4 The doors rotate in sequence. At this time, in conjunction with the movement of door 2, door arm 11 rotates roller 13 to the left while moving forward, causing spring 12 to extend.

[0063] When the user closes door 2, which is in the open state, door 2 will proceed as follows: Figure 7 , Figure 6 , Figure 5 , Figure 4 The door arm 11 rotates in sequence. At this time, the door arm 11 and the door 2 move in conjunction, causing the roller 13 to rotate to the right and move backward, causing the spring 12 to contract.

[0064] like Figure 4 As shown, with the door 2 fully closed, a gap is provided in front of the roller 13 and within the annular portion of the door arm 11. This gap is larger than the area of ​​the bottom surface of the cylindrical roller 13. Therefore, when servicing the heating cooker 100, the spring 12 is removed from the base plate 7, and the door arm 11 is moved backward until the gap reaches the position of the roller 13, thereby allowing the door arm 11 to be removed from the roller 13.

[0065] Figure 8 This is a partial sectional perspective view of the door opening and closing mechanism 50 of the heating cooker 100, viewed from the rear with door 2 open to approximately 60 degrees. (Example:) Figure 8 As shown, the door arm 11 has an inner periphery 11a, a side 11b, and an outer periphery 11c in its annular portion.

[0066] The roller 13 has a groove 13a disposed on the outer periphery of the roller 13. The groove 13a has a bottom surface 13a1 and two side surfaces 13a2 connected to the bottom surface 13a1 and opposite to each other. The bottom surface 13a1 of the groove 13a is always in partial contact with the inner periphery 11a of the annular portion of the door arm 11.

[0067] exist Figure 8 In the shown state, the bottom surface 13a1 of the groove 13a of the roller 13 contacts the inner circumference 11a of the door arm 11 at the upper part of the annular portion of the door arm 11. The bottom surface 13a1 of the groove 13a of the roller 13 does not contact the inner circumference 11a of the annular portion of the door arm 11 at the lower part of the annular portion, and a gap is provided between them. This will be explained below. Figures 9A to 9D Please provide an explanation.

[0068] Figure 9A yes Figure 7 A magnified view of a section near the gate arm 11. Figure 9B yes Figure 6 A magnified view of a section near the gate arm 11. Figure 9C yes Figure 5 A magnified view of a section near the gate arm 11. Figure 9D yes Figure 4 A magnified view of a section near the gate arm 11.

[0069] like Figure 9A As shown, the door arm 11 has an annular portion L comprising an upper portion M and a lower portion N. In the open state of the door 2, the bottom surface 13a1 of the roller 13 (refer to...) Figure 8 The portion of the door arm 11 indicated by the arc-shaped dashed line P contacts the inner periphery 11a of the annular portion L. That is, Figure 9A This indicates that the gate arm 11 has moved to the frontmost position.

[0070] like Figure 9B As shown, with door 2 open to approximately 60 degrees, at point X, the bottom surface 13a1 of roller 13 (refer to...) Figure 8 It contacts the inner periphery 11a at the upper part M of the annular portion L of the door arm 11. Furthermore, Figure 8 Observation from the rear Figure 9B A partial sectional view of the door opening and closing mechanism 50 in the state shown.

[0071] like Figure 9C As shown, with door 2 open to approximately 30 degrees, at point Y, the bottom surface 13a1 of roller 13 (refer to...) Figure 8 It contacts the inner circumference 11a of the upper part M of the annular portion L of the door arm 11. For example... Figure 9D As shown, with door 2 fully closed, at point Z, the bottom surface 13a1 of roller 13 (refer to...) Figure 8 It contacts the inner periphery 11a of the upper part M of the annular portion L of the door arm 11.

[0072] exist Figures 9B to 9D In the state shown, the inner circumference 11a of the upper portion M of the annular part L of the door arm 11 contacts the bottom surface 13a1 of the roller 13. On the other hand, the inner circumference 11a of the lower portion N of the annular part L of the door arm 11 does not contact the bottom surface 13a1 of the roller 13, and a gap is provided between them.

[0073] That is, such as Figure 9A As shown, when the door 2 is open, the portion of the bottom surface 13a1 of the roller 13, indicated by the arc-shaped dashed line P, contacts the inner periphery 11a of the annular portion L of the door arm 11.

[0074] like Figures 9B to 9D As shown, during the period when the door 2 moves from the fully closed state to the fully open state and is about to become the open state, the inner periphery 11a of the upper part M of the annular portion L of the door arm 11 contacts the bottom surface 13a1 of the groove 13a of the roller 13. On the other hand, the inner periphery 11a of the lower part N of the annular portion L of the door arm 11 does not contact the bottom surface 13a1 of the roller 13.

[0075] Therefore, when the door 2 is slightly closed from the open state, the door arm 11 is configured such that the inner circumference 11a of the annular portion L at the upper portion M of the annular portion L contacts the bottom surface 13a1 of the groove 13a of the roller 13. On the other hand, the door arm 11 is configured such that the inner circumference 11a of the annular portion L at the lower portion N of the annular portion L does not contact the bottom surface 13a1 of the roller 13.

[0076] In this embodiment, such as Figure 8 As shown, the side 13a2 of the groove 13a of the roller 13 contacts the side 11b of the door arm 11. However, the side 13a2 may not contact the side 11b, and a gap may be provided between the side 13a2 and the side 11b.

[0077] In this case, only the bottom surface 13a1 of the roller 13 contacts the inner periphery 11a of the annular portion L of the door arm 11, thus reducing the contact area between the door arm 11 and the roller 13. This structure prevents the door arm 11 from being locked and unable to move.

[0078] Furthermore, even if the door arm 11 tilts to the left or right due to shaking during the opening and closing of the door 2 or manufacturing errors, the side 11b of the door arm 11 at one or both of the upper part M and the lower part N of the annular portion L will partially contact the side 13a2 of the roller 13. This prevents extreme tilting and shaking of the door arm 11.

[0079] Furthermore, even if the side 11b of the door arm 11 at the upper part M of the annular portion L is always in contact with the side 13a2 of the groove 13a, as long as the side 11b of the door arm 11 at the lower part N of the annular portion L is not in contact with the side 13a2 of the groove 13a, the door arm 11 can be prevented from being locked and unable to move.

[0080] As described above, according to this disclosure, a door opening and closing mechanism 50, including the door arm 11 and the roller 13, can operate stably. This disclosure can be used in heating cookers such as microwave ovens and ovens.

Claims

1. A heating cooker, wherein, The heating cooker includes: shell; A heating chamber, disposed within the outer casing, has an opening on its front surface; A door that can be opened and closed freely to cover the opening on the front surface of the heating chamber; A hinge portion is provided at the lower edge of the door; A door arm, which is combined with the door; A spring, which engages with one end of the door arm, pulls the door via the door arm; and The rollers, which contact the door arm, rotate and guide the door arm as the door opens and closes. The roller has a groove disposed on the outer periphery of the roller. The door arm has an annular portion arranged to surround the roller. During the movement of the door arm, the door arm is configured such that the inner periphery of the annular portion of the door arm is always in partial contact with the bottom surface of the groove of the roller.

2. The heating cooker according to claim 1, wherein, During the movement of the door from a fully closed state to a fully open state, the door arm is configured such that, at the upper portion of the annular portion, the inner circumference of the annular portion contacts the bottom surface of the groove of the roller, and at the lower portion of the annular portion, the inner circumference of the annular portion does not contact the bottom surface of the groove of the roller.

3. The heating cooker according to claim 1, wherein, During the movement of the door arm, the side of the door arm at one or both of the upper and lower portions of the annular portion partially contacts the side of the groove of the roller.

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