JP2007218544A - High frequency heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a user to easily determine whether the door of a heating chamber is properly closed or not, when closing the door, while smoothing the closing operation of the door by a cushioning effect. <P>SOLUTION: This device comprises the door 6 for opening and closing an opening part 4 of the heating chamber 3, a door switch 9 operated in interlocking with opening and closing of the door 6, a door arm 7 having one end rotatably mounted on the door 6, a spring 12 having one end mounted on the door arm 7 and pulling the door arm 7 to give a force in the direction of closing the door 6 in close contact with a front plate 5 of the opening part 4, and a rotating arm (attenuation means) 35 for giving an attenuating force in the direction of reducing the closing speed of the door 6 at the time of closing the door 6. The attenuation means 35 gives the attenuating force when the closing angle of the door 6 is smaller than a predetermined angle at the time of closing the door 6, and reduces the attenuating force until the door 6 is closed in contact with the front plate 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a high-frequency heating device, and more particularly to a door opening and closing method for opening and closing a front opening of a heating chamber.

  Conventionally, a door as shown in FIG. 1 is common as a door of a high-frequency heating device.

  FIG. 1 is an external perspective view of a conventional high frequency heating apparatus for explaining the present invention.

  In the figure, an opening 4 is provided on the front surface of the main body 1, and a heating chamber 3 is provided inside, so that food 2 can be taken in and out of the heating chamber 3 through the opening 4. A front plate 5 made of a metal plate is provided around the opening 4.

  The opening 4 is provided with a vertically openable door 6 that can be opened and closed. If the door 6 is opened, the food 2 can be taken in and out of the heating chamber 3. During heating of the food 2, the vertical opening door 6 is in close contact with the front plate 5 with a predetermined pressing force.

  The door 6 is provided with a transparent or translucent finder portion 6a. When the door 6 is closed, the inside of the heating chamber 3 can be observed. The door 6 is provided with a handle 6b, which can be opened and closed by grasping and operating the handle 6b.

  The door arm 7 passes through a hole 5a provided in the front plate 5. One end of the door arm 7 is rotatably supported by the door 6. A coil spring (not shown) is attached to the other end. It is fixed in part. The door arm 7 is provided at two positions on the left and right sides of the opening 4 and supports the door 6 so that it is stable when the door 6 is fully opened.

  Reference numeral 8 denotes a cabinet that covers components such as the heating chamber 3, the door arm 7, and a coil spring.

  Reference numeral 9 denotes a door switch that enables the main body 1 of the high-frequency generator (not shown) to operate when the door 6 is closed, and disables the main body 1 when the door 6 opens away from the front plate 5. .

  Conventionally, the door 6 of the main body 1 of the high-frequency heating device has been provided to close the opening 4 of the heating chamber 3 so that the high frequency in the heating chamber 3 does not leak outside during cooking of the food 2. In addition, a structure that prevents heat, water vapor, etc. from leaking out of the heating chamber 3 as much as possible is adopted.

Further, the door 6 is provided with a metal punching hole for preventing high-frequency leakage so as to observe the presence or absence of the food 2 and the heating state of the food during heating, and a finder portion 6a composed of heat-resistant glass for protecting the punching hole. The structure in which the inside of the room 3 can be seen is adopted. Furthermore, it has the handle 6b which a user operates.

  Therefore, the structure of the door 6 becomes complicated, the weight of the door 6 increases, and the door 6 is strongly tightened with a coil spring or the like in order to improve the close contact between the flat portion around the opening 4 of the heating chamber 3 and the door flat portion. The pull-in configuration is common, and for this reason, the opening and closing operation when the door 6 is closed becomes heavy, and when the door 6 is closed, the door 6 and the front plate 5 collide with each other to generate an impact sound.

  The configuration and operation of the door opening / closing device 10 in this conventional high-frequency heating device will be described with reference to FIGS.

  FIG. 6 shows a state in which the door 6 is closed. The door 6 is rotatably supported around a rotation fulcrum 11. One end of the spring 12 is hooked on a spring hook 13 fixed to the main body 1, and the other end is hooked on a spring hook 14 provided on the door arm 7. The spring hooking portion 14 provided on the is pulled.

  The door arm 7 has a sliding surface 18 in contact with a roller 17 rotatably supported around a rotation fulcrum 16, and is pivotally supported with respect to a door pin 20 provided on the door. Has been.

  In addition, the sliding surface 18 of the door arm 7 tries to move along the roller 17 by the pulling force in the direction of the arrow 15 a applied to the spring hook 14 by the spring 12, and as a result, the force in the direction of the arrow 21 a is applied to the door pin 20. The door 6 is pressed against the front plate 5 with a predetermined force to close the gap with the front plate 5, and the door 6 detects that the door 6 has been properly closed by pressing the door switch 9 shown in FIG. To do.

  FIG. 7 shows a state where the door 6 is opened. As the door 6 is opened, the door arm 7 is pulled out from the front plate 5 by the door pin 20, and the sliding surface 18 moves along the roller 17. When the stopper 19 at the rear end of the sliding surface 18 comes into contact with the roller 17, the door arm 7 is not pulled out any more, and the door 6 is fully opened. At this time, the spring 12 applies a pulling force in the direction of the arrow 15b to the spring hooking portion 14, and the door arm 7 applies a pulling force in the direction of the arrow 21b to the door pin 20 to generate a force in the direction of closing the door 6. Since the door 6 has a mass with its own weight W at the center of gravity G, the magnitude relationship between the opening moment due to its own weight and the closing moment generated from the arm is such that (opening moment due to its own weight)> (closing moment generated from the arm). If the spring force is set, the door 6 can be kept fully open.

  FIG. 8 is a diagram for explaining which force the door 6 generates when the door 6 is in the middle of opening and closing.

  In FIG. 8, a state in which the door 6 is opened and the door 6 is opened to the first angle θ1 (first opening angle) is 6 ′. When the opening angle of the door 6 is in the range of θ0 to θ1 (first angle range), the moment acting in the direction of closing the door 6 caused by the door arm 7 being pulled in the direction of the arrow 22 by the pulling force 15c of the spring 12 is The door 6 moves in the direction of the arrow 23 and closes until it reaches the state shown in FIG.

  On the other hand, when the opening angle of the door 6 is opened to a second angle larger than θ1 (second opening angle), the moment acting in the direction of opening the door caused by the own weight W acting on the gravity center G of the door 6 is: Since the moment that acts in the direction of closing the door 6 caused by the door arm 7 being pulled in the direction of the arrow 22 by the pulling force 15c of the spring 12 becomes larger, the door 6 moves in the direction of the arrow 24 and is shown in FIG. It reaches the fully open state.

  Since the door has a configuration as described above, when the opening angle is smaller than θ1, a closing force is always applied by the spring force. Therefore, if the user releases the handle 6b, the door 6 is moved forward. Since it collides with the plate 5 vigorously, an irritating impact sound is produced.

  In addition, when the user closes the door 6 from the fully open state shown in FIG. 7, a moment in the closing direction due to the spring force is further applied after the opening angle of the door 6 becomes θ1 or less. The impact sound when the door is closed is further increased.

  In these prior arts, there are those shown in Patent Documents 1 to 3 as door opening / closing methods for solving the above-described impact sound.

JP 2002-39541 A JP 2002-228161 A JP-A-11-325476

  Patent Document 1 includes an operating lever that operates in conjunction with opening and closing of a door, and a connecting lever. Both the impact force when the door is closed and when the door is opened is transmitted to the damper and buffered. A configuration is disclosed.

  However, in this configuration, the front end of the damper protrudes from the front plate while the door is opened and closed, which is an obstacle to the user.

  Further, Patent Document 2 discloses a configuration in which a damper that operates according to the opening / closing operation of the door is provided in the hinge portion that is a rotation fulcrum of the door, and the operation is performed only in both the opening / closing operation or the closing operation direction. .

  However, in such a configuration, since the resistance force by the damper is added to the operation force in the entire operation range during the door opening / closing operation or in the entire operation range during the closing operation, the door opening / closing operation is heavy for the user. Or, the door closing operation is delayed.

  Further, Patent Document 3 discloses a configuration in which a damper is provided on a front plate of a main body facing the door, but in this configuration, the tip of the damper protrudes from the front plate, so that the user is in the way. It is.

  By the way, although not described in each of the above patent documents, when the door is decelerated with the damping force of the damping damper when closing the door in the high-frequency heating device, the door closes silently and does not cause unpleasant noise, On the other hand, if this damping force is always applied during the period when the door is closed, and the door closing speed is extremely reduced, the door closes with almost no sound. However, when the door is closed too quietly as described above, there is a case where it is difficult for the operator to determine whether or not the door is properly closed because there is no sound.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In claim 1, a heating chamber for storing food, an openable / closable door provided at an opening of the heating chamber, and opening / closing of the door are interlocked. A door switch that operates, a front plate that forms the opening of the heating chamber, a door arm that is rotatably attached to the door, one end that is attached to the door arm, and the door arm is pulled to pull the door to the front plate A spring for applying a force in a closing direction by close contact; and a damping means for applying a damping force in a direction to reduce a closing speed of the door when the door is closed, the damping means being predetermined when the door is closed When the angle is smaller than this angle, a damping force is applied to the door, and the damping force is reduced until the door contacts and closes the front plate.

  According to a second aspect of the present invention, a heating chamber for storing food, an openable / closable door provided at the opening of the heating chamber, a door switch that operates in conjunction with opening / closing of the door, and an opening of the heating chamber are configured. A front plate, a door arm having one end rotatably attached to the door, a spring having one end attached to the door arm, and applying force in a direction to close the door by attracting the door arm to close the door, and the door A damping means for applying a damping force in a direction to reduce the closing speed of the door when the door is closed, and the damping means has a range from a fully open state to a predetermined angle when the door is closed, However, the damping force is not applied in the vicinity where the is close and comes into contact with the front plate.

  According to a third aspect of the present invention, the damping means applies a damping force to the door arm.

  Further, according to claim 4, when the door is closed from the open state, the angle formed between the moving direction of the protrusion provided on the door arm and the contact surface of the protrusion provided on the rotary damper is the contact of the protrusion. The angle decreases as the door closes from the angle at which contact with the surface starts, and when the door closes, the movement direction of the protrusion and the contact surface are substantially tangent.

  According to the present invention, when the door of the heating chamber is quickly opened and closed, there is a buffering effect at the time of closing. Therefore, even when the door is closed at once from the fully open state, the smooth door closing operation can be performed.

  In addition, since an appropriate closing sound is generated when the door is closed, there is an effect that it is easy for the operator to determine whether or not the door is correctly closed.

  Furthermore, since the front plate on the front surface of the main body is not bulged by the damping means, the user does not get in the way when taking in and out food.

  Embodiments of the present invention will be described below with reference to the drawings.

  2 shows a state in which the door 6 is partially closed, FIG. 3 shows a state in which the door 6 is about to close, and FIG. 4 shows a state in which the door 6 is closed.

  The rotary damper 30 that constitutes the damping means is rotatably supported around a rotation center 30 c provided on the side surface of the main body 1. In addition, a rotating arm 35 is provided on the rotating damper 30 so as to rotate together with the rotating damper 30, and a pin 7 </ b> P (described later) can be brought into contact with or removed from the contact surface 33 of the rotating arm 35.

  One end of the return spring 31 is hooked on a hook portion 32 provided on the rotary damper 30 and the other end is hooked on a spring hook portion 32A provided on the heating device body 1, and the rotary damper 30 is always attached in the direction of arrow CW. The rotation arm 35 can be rotated until it comes into contact with the stopper 36.

  One end of the door arm 7 is provided with a protrusion, for example, a cylindrical pin 7P, which moves along the operation locus 34 as the door 6 opens and closes.

  As shown in FIG. 2, in the range from the fully open state 6C to the closed state 6d (first angle), the pin 7P does not contact the rotating arm 35 of the rotary damper 30. Therefore, the damping force does not act, and an operation feeling similar to that of a conventional microwave oven without the rotary damper 30 can be realized.

When the door 6 reaches the 6d state (first angle), the pin 7P comes into contact with the rotating arm 35 provided on the rotary damper 30, so that the rotary damper 30 is rotated in the direction of the arrow CCW. A damping force (load torque) is generated. At this time, the angle θ between the pin 7P and the contact surface 33 of the rotating arm 35 is generally larger than 90 ° as shown in FIG.

  FIG. 3 shows a state where the door 6 is further moved in the closing direction and is being closed, and the rotary damper 30 is further rotated in the direction of the arrow CCW by the pin 7P from the position shown in FIG.

  In the state of FIG. 3, the pin 7 </ b> P moves along the movement locus 34 and the rotating arm 35 rotates in the direction of the arrow CCW, so that a predetermined rotational load torque is generated by the rotating damper 30, and Since the force in the direction of the arrow 25 is applied to the door arm 7 via the pin 7P, the speed at which the door 6 is closed can be reduced. Here, the angle θ formed between the contact surface 33 of the rotating arm 35 and the pin 7P is smaller than the state shown in FIG. 2, and is approximately 60 ° in FIG.

Furthermore, FIG. 4 shows a state in which the door 6 abuts against the front plate 5 and is completely closed. In FIG. 4, it is the structure which rotates to the position which the rotation arm 35 contacts the pin 7P in the position where the door 6 was closed, and stops still. At this time, the contact angle θ between the contact surface 33 of the rotating arm 35 and the pin 7P is substantially zero. That is, when the door 6 is closed by contacting the front plate 5, the contact surface 33 of the rotating arm 35 is in a positional relationship such that the contact surface 33 faces the substantially tangential direction of the operation locus 34 of the pin 7P. With such a positional relationship, in the vicinity where the door 6 shown in FIG. 4 is closed, the rotating damper 30 does not rotate even if the pin 7P moves along the operation locus 34. Therefore, since the load torque generated by the rotary damper 30 does not act on the pin 7P, the damping force due to the damper is reduced and does not act on the door arm 7 and the door 6. Therefore, the door arm 7 is configured to receive a pulling force by the spring 12 and to act to close the door 6.

  As described above, in the present invention, when the door 6 of the high-frequency heating device is closed, the range from the fully open state to the first angle and the door 6 is closed to contact the front plate 5 on the front surface of the heating chamber. The damping force is prevented from acting on the door 6 in both of the adjacent ranges, and the damping force by the rotary damper 30 is applied until the door 6 is closed to a predetermined angle and immediately before the door 6 is closed. Further, when the door 6 is closed, the damping force by the rotary damper 30 is not applied to the door arm 7. Therefore, when the door 6 is closed, the door 6 collides with the front plate 5 and is uncomfortable. Generation of a shocking noise can be reduced.

  Further, the damping means operates only when the door 6 is closed. When the user opens the door 6, no damping force acts, so that the door opening force does not increase.

  In addition, when the door 6 collides with the front plate 5, the predetermined speed or more is maintained, so that an appropriate door closing sound is generated, and it is clearly transmitted to the operator that the door 6 has been closed. can do.

  Further, when the door 6 is opened, the rotary damper 30 is rotated and stopped until it comes into contact with the stopper 36 by the rotational torque in the illustrated CW direction applied to the rotary damper 30 by the return spring 31. The load torque is not transmitted to the door arm 7 via the pin 7P and does not affect the opening operation of the door 6.

  Further, since the pin 7P provided on the door arm 7 is disposed on the contact surface 33 provided on the rotation arm 35 of the rotary damper 30 so as to be fitted or separated according to the opening / closing operation of the door 6, even when the door 6 is fully opened. An extra protrusion is not generated on the front plate 5, and the user does not get in the way when taking in and out food, which is preferable in terms of usability.

  In the above embodiment, for example, the damping means may enclose oil having viscosity and use a shearing force generated by the oil, or the friction plates may be pressed against each other without using oil. A configuration that generates a load due to may be used.

  Further, the door arm 7 according to the present embodiment is not limited to the configuration provided on both sides of the door 6 as shown in FIG. 1, but is configured only on one side of the door 6 as shown in FIG. Of course, it has the same effect.

It is the external appearance perspective view of the conventional high frequency heating apparatus in one Example of this invention. It is explanatory drawing which shows the state which the door of the high frequency heating apparatus in one Example of this invention closed to the middle. It is explanatory drawing which shows the state which the door of the high frequency heating apparatus in one Example of this invention was closing. It is explanatory drawing explaining the state which the door of the high frequency heating apparatus in one Example of this invention closed. It is an external appearance perspective view of the high frequency heating apparatus in the other Example of this invention. It is explanatory drawing which shows the state which the door of the conventional high frequency heating apparatus closed. It is explanatory drawing which shows the state which the door of the conventional high frequency heating apparatus opened. It is explanatory drawing which shows the state which the door of the conventional high frequency heating apparatus opened to the middle.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Main body, 2 ... Food, 3 ... Heating chamber, 4 ... Opening part, 5 ... Front plate, 6 ... Door, 7 ... Door arm, 7P ... Pin, 9 ... Door switch, 12 ... Spring, 30 ... Rotation damper, 30c ... rotation center, 31 ... return spring, 35 ... rotating arm.

Claims (4)

  A heating chamber for storing food, an openable / closable door equipped in the opening of the heating chamber, a door switch that operates in conjunction with the opening and closing of the door, a front plate constituting the opening of the heating chamber, and one end A door arm rotatably attached to the door, a spring attached to one end of the door arm, and a force that pulls the door arm to bring the door into close contact with the front plate and applies a force in the closing direction, and the door when the door is closed A damping means for applying a damping force in the direction of decelerating the closing speed, and the damping means applies a damping force to the door when the door is smaller than a predetermined angle when the door is closed. The high-frequency heating device is characterized in that the damping force is reduced until it contacts and is closed.   A heating chamber for storing food, an openable / closable door equipped in the opening of the heating chamber, a door switch that operates in conjunction with the opening and closing of the door, a front plate constituting the opening of the heating chamber, and one end A door arm rotatably attached to the door; one end attached to the door arm; and a spring that attracts the door arm to bring the door into close contact with the front plate and applies a force in a closing direction; and when the door is closed, A damping means for applying a damping force in a direction of decelerating the closing speed, and the damping means has a range from a fully open state to a predetermined angle when the door is closed, and the front when the door is substantially closed. A high-frequency heating apparatus, wherein the damping force is not applied in the vicinity of contact with the plate.   The high-frequency heating device according to claim 1, wherein the damping means applies a damping force to the door arm. When the door is closed from the open state, the angle formed between the moving direction of the protrusion provided on the door arm and the contact surface with the protrusion provided on the rotary damper is determined when the protrusion starts to contact the contact surface. 4. The angle according to any one of claims 1 to 3, wherein the angle decreases as the door closes, and when the door closes, the movement direction of the projection and the contact surface are substantially tangent. High frequency heating device.

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