JP2006145068A - High frequency heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce impact noise caused by collision of a door and a front plate of a main body front face when a door sealing an opening portion of the main body front face, is closed in a high frequency heating device. <P>SOLUTION: This high frequency heating device comprises a heating chamber 3 storing food 2, the openable and closable door 6 mounted on an opening portion 4 of the heating chamber 3, a door switch 9 operated in interlocking with the opening and closing of the door 6, the front plate 5 constituting the opening portion 4 of the heating chamber 3, a door arm 7 rotatably attached to the door 6 at its one end, a spring 12 mounted on the door arm 7 at its one end, and applying the force in the direction to pull the door arm 7, and close the door 6 in a state of being closely kept into contact with the front plate 5, and a rotary damper 30 as a damping means for applying damping force in the direction to decelerate a closing speed of the door 6 in closing the door 6, and the rotary damper 30 applies the damping force to the door arm 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a high-frequency heating device, and more particularly to a door opening method.

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

  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, and the 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. When the door 6 is opened, the food 2 can be taken in and out of the heating chamber 3. During the heating of the food 2, the longitudinal 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 to a part of. 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 metal punching hole. A structure that allows the user to look into the room 3 is incorporated. Furthermore, it has the handle 6b which a user operates as mentioned above.

  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 closing the door 6 becomes heavy, and when the door 6 is closed, the door 6 and the front plate 5 collide 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. 16 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 12 is provided on the door arm 7 by a pulling force generated in the direction of the arrow 15 a. Pull the spring spring 14.

  The door arm 7 has a sliding surface 18 in contact with a roller 17 that is rotatably supported around a rotation fulcrum 16, and is pivotable with respect to a door pin 20 provided on the door 6. It is supported.

  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 hooking portion 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 in FIG. .

  FIG. 17 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 door arm 7 should be (opening moment due to its own weight)> (closing moment generated from the arm). If the spring force is set to, the door 6 can be kept fully open.

  FIG. 18 is a diagram for explaining which force the door 6 generates when the door 6 is opened or closed.

  In FIG. 18, a state where the door 6 is opened and opened to the first angle θ1 (first opening angle) is 6d. 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 It is greater than the moment acting in the direction of opening the door 6 caused by its own weight W acting on the center of gravity G of the door 6, and the door 6 moves in the direction of the arrow 23 and closes until reaching the state of 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), a moment acting in the direction of opening the door 6 caused by the own weight W acting on the gravity center G of the door 6 is generated. The door 6 moves in the direction of the arrow 24 as shown in FIG. 17 because it is greater than the moment acting in the direction of closing the door 6 caused by the pulling force 15c of the spring 12 being pulled in the direction of the arrow 22. It reaches the fully open state.

  Since the door 6 is configured as described above, a closing force is always applied by the spring force when the opening angle is smaller than θ1, so if the user releases his hand from the handle 6b, the door 6 Since it collides with the front plate 5 vigorously, an irritating impact sound is produced.

  Further, when the user closes the door 6 from the fully open state shown in FIG. 17, 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, since the tip of the damper protrudes from the front plate of the opening of the main body while opening and closing the door, the user is in the way.

  In addition, since the door is opened after the door is closed and the damper is in the most contracted position, and it takes time for the damper to return to the initial stroke position by the return spring, the user can open the door temporarily. When closed, the damper does not return to the initial position, so there is a problem that the buffering effect is not sufficient.

  Further, Patent Document 2 discloses a configuration in which a damper that operates in accordance with the opening / closing operation of the door is provided at the hinge portion that is a rotation fulcrum of the door so that the door operates only in the opening / closing operation direction or in the closing operation direction. .

  In such a configuration, since the resistance force by the damper is added to the operating force in the entire operating range during the door opening / closing operation or in the entire operating range during the closing operation, the door opening / closing operation becomes heavy for the user. Or the door closing action is slowed down.

  Furthermore, Patent Document 3 discloses a configuration in which a damper is provided so as to protrude from the front plate of the main body facing the door, but in this configuration, the end of the damper protrudes from the front plate, so that the user can It's in the way.

The present invention has been made in order 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. Door switch that operates, a front plate constituting the opening of the heating chamber, a door arm having one end rotatably attached to the door, and one end attached to the door arm and pulling the door arm to the front plate A spring for applying a force in a closing direction while being in close contact with the door, and a damping means for applying a damping force in a direction for reducing the closing speed of the door when the door is closed, wherein the damping means is applied to the door arm. To provide a damping force.

  According to a second aspect of the present invention, when the opening angle between the front plate and the door ranges from the fully closed state to the first opening angle, the door is closed until it comes into close contact with the front plate by the force of the spring. And a damping means for imparting a damping force to decelerate the door closing speed in the second angle range from the fully closed to the second opening angle. Is larger than the second angle range.

  According to a third aspect of the present invention, the damping means is connected to a pivot arm provided so that a part of the door arm can be fitted or retracted, and the door opening angle is within the second angle range. A part of the door arm enters a guide groove provided in the rotary arm, and a part of the door arm is detached from the guide groove outside the second angle range.

  According to a fourth aspect of the present invention, the damping means is a one-way operation damper that functions only when the door moves in the closing direction.

  Further, in the present invention, when the door is closed to the second opening angle or less, the rotating damper moves the rotating arm in a direction to close the door, so that the rotating damper gear and the rotating arm are moved. The gears of the gears mesh with each other and the damping force is generated by rotating the rotary damper. When the door is moved in the opening direction, the rotating damper and the meshing member are moved away from each other so that no damping force is generated. It is a thing.

  According to the present invention, the damping means for reducing the closing speed of the door when the door is closed is provided, and the damping force of the damping means is applied to the door arm. It is possible to attenuate the occurrence of an unpleasant impact sound by colliding with the front plate.

  In addition, with the above-described configuration, the front plate is not bulged by the attenuating means, so that the user does not get in the way when taking in and out food.

  Further, even when the door is opened and closed quickly, there is a buffering effect at the time of closing, and even when the door is closed at once from the fully opened state, there is an effect that a smooth door closing operation can be performed.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 2 shows a state in which the door 6 is closed, and FIGS. 3 to 4 show a state in the middle of opening the door 6.

  A rotary damper 30 as a damping means is supported rotatably around a rotation center 30A provided on the side surface of the main body 1, and the rotary damper 30 is provided with a closing claw 31 and an opening claw 32. The moving arm 35 is provided so as to rotate together with the rotary damper 30, and a recess 33 serving as a guide groove is provided between the closing claw 31 and the opening claw 32, and a pin 7 </ b> P described later is provided in the recess 33. It is a configuration that can be fitted or removed.

  Although not shown, the rotary damper 30 has a built-in one-way rotary clutch. The one-way rotary clutch rotates freely in the CCW direction shown in the figure and rotates freely in the CW direction. Is configured to mesh to generate a predetermined rotational load torque.

  For example, a cylindrical pin 7P is provided at one end of the door arm 7 and moves along the operation locus 34 as the door 6 opens and closes. When the door 6 is closed as shown in FIG. 2, the pin 7 </ b> P is fitted in the recess 33 provided in the rotating arm 35, so that the state shown in FIG. 2 from the state shown in FIG. 2. When the door 6 is opened, the rotating arm 35 rotates in the direction of the arrow CCW, so that the one-way clutch is idled so that no rotational load is generated.

  As shown in FIG. 3, when the door 6 is being opened, the rotation arm 35 is in contact with the tip of the opening claw 32 of the rotation arm 35 while the pin 7 </ b> P moves along the locus 34. Continues to rotate in the direction of the arrow CCW, and when the pin 7P is separated from the tip of the opening claw 32, the rotating arm 35 stops rotating and stays at the standby position.

  When the door 6 is closed, the pivot arm 35 remains in the standby position. Therefore, when the pin 7P moves along the movement locus 34, the pin 7P contacts the tip of the opening claw 32 and then closes. 31, engages with a recess 33 provided in the rotation arm 35, the rotation arm 35 rotates in the direction of the arrow CW, and a predetermined rotational load torque is generated by the rotary damper 30, and the pin 7 P A force in the direction of the arrow 25 is applied to the door arm 7 through the above, whereby the speed of closing the door 6 is reduced and the door 6 can be closed quietly.

  When the return operation of the rotary damper 30 is performed by, for example, the tension of a return spring provided separately, the return operation of the rotary damper 30 is performed when the door 6 is suddenly opened and then suddenly closed. Since time is required, a time delay occurs with respect to the opening operation of the door 6, and there is a problem that the damping force by the rotary damper 30 does not act in the next closing operation, so that it cannot be closed quietly.

  However, as described above, the rotary damper 30 as the damping means rotates in the direction of the arrow CCW in synchronization with the opening angle from the closed position of the door 6, so that the door 6 is suddenly opened and subsequently suddenly closed. Even in this case, since the damping force can be applied to the pin 7P, the door 6 can be decelerated and closed quietly.

  As described above, in the present embodiment, the pin 7P provided on the door arm 7 is disposed in the recess 33 provided on the rotating arm 35 provided on the rotary damper 30 so as to be fitted or separated depending on the opening / closing operation of the door 6. As a result, even when the door 6 is fully open, an extra bulge is generated on the front plate 5. This prevents the door arm 7 from interfering when the user puts food in and out, which is preferable in terms of usability. is there.

  Next, the relationship between the damping force by the rotary damper 30, the operating range of the closing force of the door 6 by the spring 12, and the closing operation of the door 6 will be described with reference to FIGS. 4 and 5.

  The relationship between the opening angle of the door 6 of the conventional high-frequency heating device and the opening / closing force by the spring 12 has been described with reference to FIG. 18. The angle θ1 in FIGS. 4 and 5 is also the opening angle of the door 6 as in FIG. Is equal to or less than θ1 (first opening angle) (first angle range), the door 6 receives the force in the direction of the arrow 23 from the door arm 7 by the spring 12 and closes, and the angle is equal to or more than θ1 (second opening angle). In this case (second angle range), the weight of the door 6 wins and automatically opens.

  Here, it is assumed that a damping force is applied to the door arm 7 in a range where the opening angle is smaller than θ2. That is, the door when the pin 7P provided on the door arm 7 moves in the direction of the arrow 23 along the operation track 34 and abuts against the closing claw 31 provided on the rotation arm 35 and the rotation arm 35 starts to rotate. The opening angle of 6 is θ2.

  Here, the relationship between the magnitude relationship between θ1 and θ2 and the door closing operation will be described. This is a case where the door 6 is closed by applying momentum in the direction of the arrow 26 from the state in which the door 6 indicated by 6C is fully opened.

  FIG. 4 shows the case of θ2 <θ1. In this case, if the opening angle of the door 6 is closed to the range of θ2 <θ1, the door 6 receives a force in the closing direction as shown by the arrow 23 and closes to θ2. After that, the pin 7P provided on the door arm 7 comes into contact with the closing claw 31 of the rotating arm 35 and a damping force is applied, and the closing speed of the door 6 is reduced, but the door 6 receives the force 23 in the closing direction. Since it continues, the closing operation continues while decelerating, and is finally closed.

  FIG. 5 shows the case of θ2> θ1. In this case, if the opening angle of the door 6 is closed to the range of θ2 <θ1, the door 6 is opened as in the case of θ2 <θ1 shown in FIG. When the door 6 is closed while decelerating, but there is not enough momentum to close the door 6, the pin 6 </ b> P provided on the door arm 7 is in contact with the closing claw 31 of the rotating arm 35 at the position where the angle θ <b> 2 has been reached. Since it starts, the door 6 does not reach the position of the angle θ1, and may stop at a position between θ2 and θ1. At that position, the door 6 receives force in the opening direction indicated by the arrow 24 from the door arm 7, so that the door 6 starts to open again and finally reaches the fully open position 6C. That is, the user tries to close the door 6, but the door 6 opens again without being closed, and performs an operation different from the user's intention.

  As described with reference to FIGS. 4 and 5, according to the present embodiment, the magnitude relationship between the opening angle θ <b> 1 that applies the force in the closing direction to the door 6 by the door arm 7 and the opening angle θ <b> 2 that applies the braking force by the damping means is θ <b> 2. <Θ1 is preferable because the door 6 can be closed as the user intends.

  Another embodiment is shown in FIGS. In this device, the gear A provided on the outer periphery of the rotating arm 35 and the gear B provided on the rotary damper 30 are connected to each other. FIG. 6 shows a state in which the door 6 is closed, and FIG. The state in the middle of opening 6 is shown.

  When the door 6 is opened, the rotating arm 35 rotates in the arrow CCW direction, and the gear B of the rotary damper 30 meshed with the gear A of the rotating arm 35 is rotated in the arrow CW direction. In particular, the rotational speed of the rotary damper 30 can be made higher than the rotational speed of the rotary arm 35 by meshing them as (number of teeth of gear A)> (number of teeth of gear B). Thereby, since the rotation damper 30 rotates at high speed, even a weaker rotation damper 30 can increase the damping effect, and the rotation damper 30 can be downsized.

  In the embodiment described above, the case where the rotary damper 30 is provided with a one-way damper that acts only when the door 6 is moved in the closing direction has been described, but as another embodiment, FIG. 8 to FIG. An embodiment will be described in which the rotary damper 30 is not provided with a one-way operation function but is provided with a one-way operation function by other means.

  8 and 9, the rotation center 35C of the rotation arm 35 is provided on the swing arm 36, and the swing arm 36 is swingably supported by a predetermined angle around the swing center 36C. Yes.

  A gear 35B is provided around the rotating arm 35, and a gear 30B is also provided on the rotary shaft of the rotary damper 30, so that the damping torque works even if the rotary damper 30 rotates in either the left or right direction. And it does not have a one-way operation function.

  FIG. 8 shows a case where the door 6 is closed. Since the door 6 rotates in the direction of the arrow CW, the door arm 7 rotates the rotating arm 35 in the direction of the arrow CW to move around the swing center 36 </ b> C together with the swing arm 36. It swings in the direction of the arrow CW, and the gear 35B provided on the rotating arm 35 and the gear 30B provided on the rotary damper 30 mesh with each other to rotate the rotary damper 30 in the arrow CCW direction.

  As a result, the rotary damper 30 generates a damping torque, applies a damping force to the door arm 7 via the closing claw 31 of the rotating arm 35 and the pin 7P provided on the door arm 7, and a braking force when the door 6 is closed. Therefore, the door 6 does not collide with the front plate 5 during the closing operation, and unpleasant impact noise can be reduced.

  Next, the operation when the door 6 is opened will be described with reference to FIG. 9. Since the door arm 7 and the pin 7P move in the direction of the arrow 25 by the operation of opening the door 6, the pin 7P comes into contact with the opening claw 32 of the rotating arm 35. The pivot arm 35 and the swing arm 36 are pivoted in the direction of the arrow CCW.

  The gear 35B provided on the rotary arm 35 and the gear 30B provided on the rotary damper 30 are disengaged by the rotation operation in the CCW direction, and the rotary arm 35 receives a damping force from the rotary damper 30. Without rotating, and the rotation damper 30 does not affect the door opening operation for the user.

  Still another embodiment will be described with reference to FIGS. 10 and 11. The swing arm 36 is supported at one end so as to be swingable concentrically with the rotation center 30C of the rotary damper 30, and at the other end, a swing arm 35 having a closing claw 31 and an opening claw 32 is closed. 31 and a swinging center 35C provided in the vicinity of the opening claw 32 are supported so as to be swingable.

  A gear 30B is provided on the outer periphery of the rotary damper 30, and a gear 35B that can mesh with the gear 30B is provided on a surface of the rotating arm 35 that faces the rotary damper 30.

  The operation when closing the door 6 will be described with reference to FIG. 10. Since the door arm 7 moves in the direction of the arrow 23, the rotating arm 35 rotates in the direction of the arrow CW around the rotation center 35C, and the gear 35B and the gear 30B. After that, the rotating arm 35 rotates integrally with the rotary damper 30, so that a braking force can be applied to the door 6 from the closing claw 31 through the pin 7 </ b> P and the door arm 7.

  The operation when opening the door 6 will be described with reference to FIG. 11. When the door arm 7 moves in the direction of the arrow 25, the rotating arm 35 rotates in the direction of the arrow CCW around the rotation center 35C. Is released from the engaged state, and the rotating arm 35 and the swinging arm 36 are rotated in the direction of the arrow CCW around the rotation center 30C of the rotary damper 30, and the rotary arm 35 receives the damping force from the rotary damper 30. Since it rotates idly without receiving it, it becomes a one-way rotation operation in which the rotary damper 30 does not affect the door opening operation for the user.

  Still another embodiment will be described with reference to FIGS. One end of the swing arm 36 is supported so as to be swingable concentrically with the rotation center 30 </ b> C of the rotary damper 30, and the other end of the swing arm 36 is provided with a closing claw 31 and an opening claw 32. The swinging claw 32 is supported so as to be swingable around a swinging center 36 </ b> C provided on the opposite side from the rotation center 30 </ b> C of the damper 30.

  A gear 30B is provided on the outer periphery of the rotary damper 30, and further, a gear 35B that faces the rotary damper 30 of the rotary arm 35 and that can mesh with the gear 30B is provided on the side near the door 6. ing.

  The operation when closing the door 6 will be described with reference to FIG. 12. Since the door arm 7 moves in the direction of the arrow 23, the rotating arm 35 rotates in the direction of the arrow CW around the swing center 36C, and the gear 35B and the gear 30B. After that, the rotating arm 35 rotates integrally with the rotary damper 30, and a braking force can be applied to the door 6 from the closing claw 31 through the pin 7 </ b> P and the door arm 7.

  The operation when opening the door 6 will be described with reference to FIG. 13. When the door arm 7 moves in the direction of the arrow 25, the rotating arm 35 rotates in the direction of the arrow CCW around the swing center 36C. Is released from the engaged state, and the rotation arm 35 and the swing arm 36 rotate in the direction of the arrow CCW around the rotation center 30C of the rotation damper 30, so that the rotation arm 35 has a damping force from the rotation damper 30. This is a one-way rotation operation in which the rotation damper 30 does not affect the door opening operation for the user.

  Still another embodiment will be described with reference to FIGS. 14 and 15. The swing arm 36 is supported at one end so as to be swingable around a swing center 36 </ b> C, and at the other end, a swing arm 35 having a closing claw 31 and an opening claw 32 is provided at the rotation center of the rotary damper 30. It is concentrically supported by 30C and is swingably supported. A gear 30 </ b> B is provided on the inner peripheral portion of the rotary damper 30, and a gear 35 </ b> B that meshes with the gear 30 </ b> B is provided on the opposite side of the door arm 7 on the outer periphery of the rotating arm 35.

  The operation when closing the door 6 will be described with reference to FIG. 14. Since the door arm 7 moves in the direction of the arrow 23, the rotating arm 35 rotates together with the swinging arm 36 around the swinging center 36c in the direction of the arrow CW. 35B and the gear 30B mesh with each other, and then the rotating arm 35 rotates integrally with the rotary damper 30, and can apply a braking force to the door 6 from the closing claw 31 through the pin 7P and the door arm 7.

  The operation when opening the door 6 will be described with reference to FIG. 15. When the door arm 7 moves in the direction of the arrow 25, the swing arm 36 and the swing arm 35 swing in the arrow CCW direction around the swing center 36C. 35B and the gear 30B are disengaged from the meshed state, and the rotating arm 35 rotates idly around the rotation center 30C without receiving the damping force from the rotation damper 30, so that the rotation damper 30 is used for the door opening operation for the user. Is a one-way rotation operation that does not affect.

  Since the present invention is configured as described above, it is possible to reduce an unpleasant impact sound in which the door collides with the front plate by applying a damping force when the door of the high-frequency heating device is closed.

  Further, since the damping means is arranged so as to apply a damping force to the door arm 7, there is no protrusion from the front plate when the door is opened, so that it does not become an obstacle when the user puts food in and out. There are advantages.

  Furthermore, since the damping means is provided with a one-way operation function that operates only when the door is closed, the damping force does not act when the user opens the door, so that the door opening force does not increase. It is.

It is an external appearance perspective view of the conventional high frequency heating apparatus for demonstrating 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. It is explanatory drawing which shows the state which the door of the high frequency heating apparatus in one Example of this invention opened to the middle. It is explanatory drawing explaining the opening / closing conditions of the door of the high frequency heating apparatus in one Example of this invention. It is explanatory drawing explaining the opening / closing conditions of the door of the 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 the other Example of this invention closed. It is explanatory drawing which shows the middle state which opens the door of the high frequency heating apparatus in the other Example of this invention. It is explanatory drawing which shows the state by which the door of the high frequency heating apparatus in the further another Example of this invention is closed. It is explanatory drawing which shows the state in the middle of opening the door of the high frequency heating apparatus in other Example of this invention of this invention. It is explanatory drawing which shows the state by which the door of the high frequency heating apparatus in the further another Example of this invention is closed. It is explanatory drawing which shows the state in the middle of opening the door of the high frequency heating apparatus in other Example of this invention of this invention. It is explanatory drawing which shows the state by which the door of the high frequency heating apparatus in the further another Example of this invention is closed. It is explanatory drawing which shows the state in the middle of opening the door of the high frequency heating apparatus in other Example of this invention of this invention. It is explanatory drawing which shows the state by which the door of the high frequency heating apparatus in the further another Example of this invention is closed. It is explanatory drawing which shows the state in the middle of opening the door of the high frequency heating apparatus in other Example of this invention 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 3 Heating chamber 4 Opening part 5 Front plate 6 Door 7 Door arm 7P Pin 9 Door switch 11 Rotation fulcrum 12 Spring 16 Rotation fulcrum 30 Rotation damper 30B Gear 30C Damper rotation center 31 Closure claw 32 Opening claw 35 Rotation arm 35B Gear 35C Center of rotation 36 Swing arm

Claims (5)

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 having one end attached to the door arm; the door arm being attracted to bring the door into close contact with the front plate; and a force applied in a closing direction; and the door when the door is closed A high-frequency heating device, comprising: a damping unit that applies a damping force in a direction that decelerates the closing speed of the door, and the damping unit applies a damping force to the door arm. In the first angle range from the fully closed to the first opening angle, the door is closed until it is in close contact with the front plate by the force of the spring, and the door opening angle is In the second angle range from the fully closed position to the second opening angle, the second angle range is provided with a damping means for applying a damping force for reducing the door closing speed, and the first angle range is the second angle range. 2. The high frequency heating apparatus according to claim 1, wherein the high frequency heating apparatus is larger. The attenuating means is connected to a rotating arm provided so that a part of the door arm can be fitted or retracted, and when the door opening angle is within the second angle range, a part of the door arm is a rotating arm. 3. The high frequency heating apparatus according to claim 1, wherein a part of the door arm enters the guide groove provided, and a part of the door arm is detached from the guide groove outside the second angle range. 4. The high-frequency heating device according to claim 1, wherein the damping means is a one-way operation damper that functions only when the door moves in the closing direction. When the door is closed to a second opening angle or less, the rotating damper moves the rotating arm in a direction to close the door, so that the gear of the rotating damper meshes with the gear of the rotating arm. The damping force is generated by rotating the rotary damper, and when the door is moved in the opening direction, the damping force is not generated by moving the rotary damper and the meshing member away from each other. The high-frequency heating device according to claim 3.

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