JP4734948B2 - Door opening and closing device for high frequency heating equipment - Google Patents

Description

  The present invention relates to an improvement in door opening / closing operability of a high-frequency heating device.

  Conventionally, this type of laterally-opening door employs a pulling method in which a handle portion is directly pulled to open (see, for example, Patent Document 1).

FIG. 8 shows a conventional pull-type door opening / closing mechanism described in Patent Document 1. As shown in FIG. As shown in FIG. 8, the door 1, the handle 2 provided on the door 1, the door key 3 provided on the door 1, the door hook 4 engaged with the door key 3, the hook spacers 5 and 6 operated by the door key 3, , And switches 7, 8 and 9 that are turned on and off via hook spacers 5 and 6.
Japanese Patent Laid-Open No. 11-182853

  However, in the conventional configuration, when the handle 2 of the door 1 is pulled, the door key 3 opens along the inclination angle 3a of the front end engaging portion. Needless to say, when the inclination angle is tight, the opening force of the door 1 becomes heavy, and when it is loose, it becomes light. The factors that determine the inclination angle are the opening / closing force of the door 1 and the radio wave leakage regulation, but the current situation is that priority is given to the operation of the switch 6 that stops oscillation with respect to the opening of the door 1. The door key 3 has a structure in which the switches 7, 8 and 9 are turned on via the hook spacers 5 and 6 by the force of the door spring 10. The door key 3 is slidably attached to an attachment portion 11 provided on the door 1. The door spring 10 is required to have a load setting in consideration of the ON load of the switches 7, 8, 9 and the sliding resistance of the door key 3. If an attempt is made to open the door 1 under these conditions, the friction resistance of the engagement portion 4a of the door key 3 and the door hook 4, the friction resistance of the mounting portion 11 provided on the door 1 and the door key 3, the opening direction of the door 1, and the operation of the door key 3 Since the direction is perpendicular, there is a problem that the force is divided and the opening force becomes considerably heavy.

The present invention solves the above-described conventional problems. A handle that is movable around a rotation axis is provided in a part of the door, and the door key is slid in the vertical direction in conjunction with the movement that moves around the rotation axis of the handle. and to provide a device with excellent operability anyone can open and close easily with one finger by the structure to release the fitting between Doafukku is.

In order to solve the conventional problems, a door opening / closing mechanism of a high-frequency heating device according to the present invention is provided on a main body for cooking an object to be heated, a laterally opening door for taking in and out the object to be heated, and a part of the door. A handle that is movable around the rotation axis, a door key that is provided on the door and has a convex portion that slides up and down in conjunction with a movement that moves around the rotation axis of the handle, and enables the door key to slide. and door spring, and Doafukku in which a plurality of switches for oN-OFF directly or indirectly by the Doaki provided in the main body, and a metal plate having a radio wave leakage preventing function attached to the door, one end of the handle A protrusion provided, a recess provided on the door key and covering the protrusion, and one end of the handle so that an upward force is applied to the handle. Comprising a handle spring hooked at the other end to the handle ah, wherein the Doaki is Yes hooking slidably long hole formed in the side surface of the sheet metal, as a fulcrum the rotary shaft by pulling the handle is obtained by a configuration in which OFF the switch to release the fitting between the protrusion and the Doaki and contacts slide the Doaki downward the Doafukku of the handle by relatively light operating force.

  As a result, when the handle is pulled, the door key is slid up and down in conjunction with the movement that rotates around the rotation axis provided on a part of the door, and when the door key is removed from the door hook, The frictional resistance of the engaging portion can be suppressed as much as possible, and anyone can easily open and close with one finger.

  The door opening and closing device of the high-frequency heating device of the present invention can provide a device with excellent operability that can be easily opened and closed with a very light force.

1st invention is provided in the said main body which cooks a to-be-heated object, the laterally open door which puts in / out a to-be-heated object, the handle | steering-wheel which moves centering on the rotating shaft provided in a part of the said door, and the said door and Doaki having a convex portion which slides in the vertical direction in conjunction with the movement of the movable about an axis of rotation of the handle, the door spring that allows sliding the Doaki, directly or indirectly by the Doaki provided in the body A door hook provided with a plurality of ON / OFF switches, a sheet metal attached to the door and having a function of preventing radio wave leakage, a protrusion provided at one end of the handle, and a recess provided in the door key and covering the protrusion When, and a handle spring the other one end to the door hooked on the handle as upward force acting on the handle The Doaki is Yes hooking slidably long hole formed in the side surface of the sheet metal, the rotary shaft and the a projection of the handle Doaki contacts with relatively light operating force as a fulcrum by pulling the handle interlocking said Doaki by sliding down a configuration in which OFF the switch to release the fitting between the Doafukku, pulling the handle to move to rotate around a rotation shaft provided in a part of the door Since the door key is converted into a movement that slides up and down, the frictional resistance between the door hook and the door key engaging part can be suppressed as much as possible when the door key is released from the door hook. A device with excellent operability that can be opened and closed can be provided.

  In particular, the distance between the contact portion between the handle and the door key and the rotation axis is greater than the distance from the portion where the door opening / closing device of the high-frequency heating apparatus according to the first invention is touched with the handle to the rotation axis. By shortening, the operating force of the door key can be made equal to or greater than the pulling force, and the door key can be operated with a force greater than the pulling force, and the door can be opened and closed with a lighter force.

  In the third invention, in particular, the contact portion between the handle and the door key of the door opening and closing apparatus according to the first invention is configured to be in point contact at all times when it is movable, thereby minimizing frictional resistance. The pulling force can be converted into the operation of the door key without loss, and the door can be opened and closed with a lighter force.

  In particular, the door key of the door opening and closing device of the high-frequency heating device according to the first aspect of the present invention is provided on the side surface of the sheet metal constituting the radio wave leakage prevention function built in the door so as to be slidable up and down. By providing multiple protrusions on the sliding surface with the sheet metal side surface, the frictional resistance is minimized, and the pulling force of the door can be converted to the operation of the door key without loss, and the door can be opened and closed with a lighter force. Can do.

In the fifth aspect of the invention, in particular, the difference between the distance from the handle portion of the handle of the door opening and closing device according to the first aspect of the invention to the rotating shaft and the distance from the contact portion between the handle and the door key to the rotating shaft is determined while the door key is moving. By adopting a configuration that makes the initial stage of movement small, it is possible to obtain the force necessary to release the contact resistance between each part of the initial stage of movement with a light force, and it is possible to open the door with a small pulling distance during movement. It becomes.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a main part when the door of the door opening / closing device of the high-frequency heating device according to the first embodiment of the present invention is closed, and FIG. 2 is an overall view of the high-frequency heating device according to the first embodiment of the present invention. FIG. 3 is a detailed view of the handle of the door opening / closing device of the high-frequency heating device according to the first embodiment of the present invention, and FIG. FIG. 5 is a detailed view of the contact structure of the handle, and FIG. 5 is a detailed view of the door key of the door opening / closing device of the high-frequency heating device according to the first embodiment of the present invention.

  1 to 5, the high-frequency heating apparatus includes a main body 12, a heating chamber 13 for storing food, a door 1 for closing the heating chamber 13, and an operation unit 14, and the door 1 has a door key 3 for maintaining the closed state with the main body 12. However, the door hook 4 is provided on the main body 12 side. The door key 3 is hooked at one end to the upper portion 1a of the door 1 so as to act upward by a door spring 10 (spring), and the other end is hooked to the door key 3 so as to be slidable into the long hole 15a on the side surface of the sheet metal 15 having the function of preventing radio wave leakage. It is caught. The door spring 10 turns on the switch 9 while receiving the friction resistance between the tip of the projection 3b (convex portion) of the door key 3 and the hook spacer 5, and the contact resistance between the door key 3 and the side surface of the metal plate 15 having the function of preventing leakage of radio waves ( (ON load 200g) is necessary, so the pull-in force has a margin with respect to the ON load of the switch.

  A plurality of projections 3 d are provided on the sliding surface of the door key 3 with the sheet metal 15, and slides between the tip of the projection 3 d and the sheet metal 15. A handle 2 is attached to the lower part of the door 1 so as to rotate about a fulcrum 2 a of the handle 2. One end is connected to the claw 1 b of the door 1 and the other end is connected to the handle 2 so as to act upward by a handle spring 16. It is caught. Further, a protrusion 2c is provided at a position of approximately 90 ° C. from a straight line connecting the clue portion 2b of the handle 2 and the fulcrum 2a. When the distance A between the clue portion 2b and the fulcrum 2a is 1, the dimensional relationship is set such that the distance B between the fulcrum 2a and the protrusion 2c becomes a ratio of 0.6 (see FIG. 3). Further, the tip of the protrusion 2c of the handle 2 has a circular shape (see FIG. 4).

On the other hand, the door key 3 has a recess so as to cover the protrusion 2c of the handle 2, and has a contact surface 3a close to the operation direction of the protrusion 2c. Also the Doaki 3 in two projections 3b, 3c (convex portions) is provided with substantially uniformly from the center to the door 1 tip toward the Doafukku 4 side has an upward fitting portion.

Fitting part 3b of the Doaki 3 to Doafukku 4 disposed on the body 12 side, an opening 4b having a gentle slope at a position corresponding to 3c, is provided with 4c. The door hook 4 is provided with switches 7, 8, 9 for detecting the opening / closing of the door 1. The switches 7, 8 are connected to the tip of the projection 3 b of the door key 3 through the hook spacer 5, and the switch 9 is the projection 3 c of the door key 3. It is configured to oN · OFF directly at the tip of the engagement portion fitted provided on the tip. The hook spacer 5 has a fulcrum 5a as a rotation shaft, one piece is pushed at the tip of the projection 3b of the door key 3, and the switch 8 is turned on at the other end. The distance from the fulcrum 5a to the one piece where the projection 3b of the door key 3 contacts is about twice the distance from the fulcrum 5a to the other end where the switch 8 is turned on. The operation button of the switch 7 is attached toward the fulcrum 5 a of the hook spacer 5.

  The door hook 4 is attached to the main body 12 with a structure (not shown) that is adjusted and attached with a screw so as not to cause looseness of the door 1 or the like.

  About the door opening / closing apparatus of the high frequency heating apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, when the door 1 is closed, the handle 2 is acted upward by the handle spring 16 and can be stably attached to a predetermined position without any play. In addition, since there is a gap between the protrusion 2c of the handle 2 and the contact surface 3a of the door key 3, some components and assembly variations can be absorbed.

  When the handle 2b of the handle 2 is pulled with a hand, the protrusion 2c of the handle 2 moves with the fulcrum 2a as the rotation axis, and the gap between the protrusion 2c of the handle 2 and the contact surface 3a of the door key 3 is blocked. Until the gap between the protrusion 2c of the handle 2 and the contact surface 3a of the door key 3 is eliminated, only the load of the handle spring 16, the tip of the protrusion 3b of the door key 3, and the frictional resistance of the hook spacer 5 are applied to the handle 2, so that a very light force However, after the gap between the protrusion 2c of the handle 2 and the contact surface 3a of the door key 3 disappears, the load of the door spring 10 and the contact resistance between the door key 3 and the side surface of the sheet metal 15 having the function of preventing radio wave leakage are eliminated. Will be added. However, the sliding surface of the door key 3 with the sheet metal 15 is provided with a plurality of protrusions 3d, and sliding between the tip of the protrusion 3d and the sheet metal 15 can minimize the contact resistance. I can do it. Further, the frictional resistance between the tip of the projection 3b of the door key 3 and the hook spacer 5 is also the other distance at which the switch 8 is turned on from the fulcrum 5a to the distance between the fulcrum 5a of the hook spacer 5 and the projection 3b of the door key 3. Therefore, the contact resistance can be reduced to half of the ON load (200 g) of the switch 8. Since the button for operation of the switch 7 is attached toward the fulcrum 5a of the hook spacer 5, the switch 7 is designed so as not to affect the frictional resistance between the tip of the projection 3b of the door key 3 and the hook spacer 5. Contact resistance can be suppressed.

  When the handle 2 is continuously pulled, the protrusion 2c of the handle 2 and the contact surface 3a of the door key 3 are always in contact with each other, but the tip of the protrusion 2c of the handle 2 is circular and is always in point contact. The contact resistance is also kept to a minimum.

  At this time, it is necessary for the mechanism since the distance B between the fulcrum 2a and the projection 2c is set to a ratio of 0.6 when the distance A between the clue part 2b of the handle 2 and the fulcrum 2a is 1. The handle 2 can be pulled with an operating force of about 60% of the required force.

Moreover, it continued pulling of the handle 2, an opening 4b having a gentle slope at a position corresponding to the fitting section 3b, 3c of Doaki 3 Doafukku 4, the protrusion 3b of Doaki 3 from 4c, fitting upward 3c tip The joint can be removed and the door 1 can be opened.

  When closing the door 1, a plurality of protrusions 3 a are provided on the sliding surface of the door key 3 with the sheet metal 15 to slide between the tip of the protrusion 3 a and the sheet metal 15, thereby minimizing contact resistance. ing. Further, the frictional resistance between the tip of the projection 3b of the door key 3 and the hook spacer 5 is also the distance from the fulcrum 5a to the one piece where the fulcrum 5a of the spacer 5 and the projection 3b of the door key 3 are in contact with each other. Since the distance is about twice the distance, the contact resistance is reduced to half of the ON load (200 g) of the switch 8. Since the button for operation of the switch 7 is attached toward the fulcrum 5a of the hook spacer 5, the switch 7 is designed so as not to affect the frictional resistance between the tip of the projection 3b of the door key 3 and the hook spacer 5. Since the pull-in force of the door spring 10 is reduced because the contact resistance is suppressed, the door spring 10 can be easily closed with a light force.

As described above, in the present embodiment, the handle 2 that is movable around the rotation axis of the door 1 is provided, and the door key 3 is slid up and down in conjunction with the movement of the handle 2 around the rotation axis. with the structure to release the fitting between Doafukku 4 to pull the handle 2 when in conjunction with the movement to rotate around a rotation shaft provided in a part of the door 1 slides the Doaki 3 vertically Because it converts to movement, when the door key 3 is removed from the door hook 4, the frictional resistance of the engagement part of the door hook 4 and the door key 3 can be suppressed as much as possible, so anyone can easily open and close the door 1 with very light force A device with excellent performance can be provided.

(Embodiment 2)
FIG. 6 is a cross-sectional view of the main part when the door of the door opening and closing device of the high-frequency heating device of the second embodiment of the present invention is closed, and FIG. 7 is the door of the high-frequency heating device of the second embodiment of the present invention. It is principal part sectional drawing in the middle of door opening of a switchgear.

  6 and 7, only the difference from the first embodiment will be described. The angle b of the protrusion 2c of the handle 2 is larger than the angle a of the contact surface 3a of the door key 3.

  About the door opening / closing apparatus of the high frequency heating apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

When the handle portion 2 b of the handle 2 is pulled, the projection 2 c starts to rotate around the fulcrum 2 a and contacts the a portion of the contact portion 3 a of the door key 3. At this time, frictional resistance is applied between the parts, and it is clear that it is very large compared to the resistance during sliding. Therefore, in this embodiment, in order to reduce the force of the clue part 2b of the handle 2, the distance between the clue part 2b of the handle 2 and the rotary shaft 2a (corresponding to A in FIG. 2) and the contact that contacts the door key 3 from the rotary shaft 2a. The ratio of the distance between the parts 3a (corresponding to B in FIG. 2) is 1: 0.45, and only a force less than half of the force required for the mechanism is required. On the other hand because it does not take much movement distance Doaki 3, in order to release the fitting of the protrusion 3c tip of Doaki 3 from Doafukku 4, it is necessary to significantly rotate the handle 2.

  Therefore, the projection 2c of the handle 2 and the contact portion 3a of the door key 3 are almost in contact with each other at the time when the operation button of the switch 9 is turned off by continuously pulling the clue portion 2b, and is shifted to the tip of the projection 2c of the handle 2. . As a result, the ratio of the distance between the handle 2b of the handle 2 to the rotary shaft 2a and the distance between the rotary shaft 2a and the contact portion 3a that contacts the door key 3 becomes 1: 0.7, and the door 1 can be moved with the minimum required rotation of the handle 2. Can be opened.

  As described above, the door opening and closing device of the high-frequency heating device according to the present invention can be easily opened and closed with a very light force, and thus can be applied to a device having a lateral opening.

Sectional drawing of the principal part at the time of the door closing of the door opening / closing apparatus of the high frequency heating apparatus in Embodiment 1 of this invention Overall view of high-frequency heating device according to Embodiment 1 of the present invention Detailed view of the handle of the door opening / closing device of the high-frequency heating device according to Embodiment 1 of the present invention Detailed view of the contact configuration of the door arc key and the handle of the door opening / closing device of the high-frequency heating device according to Embodiment 1 of the present invention Detailed view of the door arc key of the door opening and closing device of the high-frequency heating device in Embodiment 1 of the present invention Sectional drawing of the principal part at the time of the door closing of the door opening / closing apparatus of the high frequency heating apparatus in Embodiment 2 of this invention Sectional drawing of the principal part in the middle of door opening of the door opening / closing apparatus of the high frequency heating apparatus in Embodiment 2 of this invention Enlarged view of main parts of conventional door key and door hook

1 door 2 handle 2a fulcrum (rotating shaft)
3 Door key 3b, 3c Projection (convex)
4 Door hook 7, 8, 9 Switch 10 Door spring (spring)
12 Body

Claims (4)

A main body for cooking the object to be heated, a laterally open door for taking in and out the object to be heated, a handle movable around a rotation shaft provided in a part of the door, and a rotation shaft of the handle provided in the door and Doaki having a convex portion in conjunction with the movement of the movable slide in the vertical direction around a door spring that allows sliding the Doaki plurality of oN-OFF directly or indirectly by the Doaki provided in the body A door hook provided with a switch, a metal plate attached to the door and having a function of preventing leakage of radio waves, a protrusion provided at one end of the handle, a recess provided in the door key and covering the protrusion, and the handle upwardly with a handle spring the other one end to the door hooked to the handle such that a force acts, the said Doaki The Yes hooking slidably long hole formed in the side surface of the sheet metal, by pulling the handle in contact with the with the projection of the handle Doaki is a relatively light operating force as a fulcrum the rotary shaft said Doaki release and door opening and closing device of a high-frequency heating device configured to OFF the switch fitted between the Doafukku slide down the. The door opening and closing device for a high-frequency heating device according to claim 1, wherein the distance from the contact portion between the handle and the door key to the rotating shaft is shorter than the distance from the portion touched by the hand of the handle to the rotating shaft. The door opening and closing device for a high-frequency heating device according to claim 1, wherein the contact portion between the handle and the door key is in a point contact shape when movable. The high frequency heating according to claim 1, wherein the door key is provided so as to be slidable up and down on a side surface of the sheet metal that constitutes a radio wave leakage prevention function built in the door, and a plurality of protrusions are provided on the sliding surface with the side surface of the sheet metal. Equipment door opener.

Images