WO2020170993A1

WO2020170993A1 - Door release mechanism for heating cooking device, and heating cooking device

Info

Publication number: WO2020170993A1
Application number: PCT/JP2020/005930
Authority: WO
Inventors: 正浩西島
Original assignee: シャープ株式会社
Priority date: 2019-02-21
Filing date: 2020-02-17
Publication date: 2020-08-27
Also published as: EP3929491A1; EP3929491A4; JPWO2020170993A1

Abstract

Provided is a door release mechanism for a heating cooking device with which the door can be opened quickly using a motor having low torque. This door release mechanism for a heating cooking device, in which an engaging part provided in a door engages an engagement-receiving part provided on a heating cooking device main body, thereby closing the door relative to the cooking device main body, comprises: a motor provided in the heating cooking device main body; a cam provided in the cooking heating device main body and rotated by the motor; and a linear movement member that is provided in the cooking heating device main body and that is moved linearly in a first direction by the rotation of the cam, thereby moving the engaging part in the direction in which the engagement with the engagement-receiving part is released.

Description

Door release mechanism of heating cooker, heating cooker

The present invention relates to a door release mechanism for a heating cooker such as an oven and a microwave oven, and a heating cooker including the same. The present application claims priority based on Japanese Patent Application No. 2019-029568 filed in Japan on February 21, 2019, the contents of which are incorporated herein by reference.

Patent Document 1 holds a door that can be engaged with a door of a home electric appliance such as a heating cooker, and can be moved between a first position in which the door is held in a closed position and a second position in which the door is opened. A door release mechanism is disclosed that includes a mechanism, a cam having a plurality of cam surfaces, and a motor for driving the cam in response to a control signal. The holding mechanism has a hook spacer that slides on the cam surface, and the hook spacer is rotated by the rotation of the cam to push up the door key provided on the door. The door key pushed up passes over the engagement receiving portion, the engagement is released, and the door is opened.

Patent No. 5485167

In the door release mechanism described in Patent Document 1, since the hook spacer is rotated by the rotation of the cam to push up the door key, the force obtained by driving the motor is dispersed and a motor with a large torque is required.

However, if a motor with a large torque is used, the time required from the door opening instruction to the door opening becomes long, and the door cannot be opened quickly. To open the door quickly, it is necessary to use a motor with low torque.

One aspect of the present invention is made in view of the above problems, and provides a door release mechanism of a heating cooker capable of quickly opening a door by using a motor having a small torque, and a heating cooker including the same. To aim.

In order to solve the above problems, in a door release mechanism of a heating cooker according to an aspect of the present invention, an engagement portion provided on the door is engaged with an engagement receiving portion provided on the cooker body. Is a door release mechanism of a heating cooker in which the door is closed with respect to the cooker body, and includes a motor provided in the cooker body and a motor provided in the cooker body and rotated by the motor. And a linear movement provided on the cooker main body, which linearly moves in a first direction by rotation of the cam and moves the engaging portion in a direction in which the engagement with the engagement receiving portion is released. And a member.

Advantageous Effects of Invention According to one aspect of the present invention, it is possible to provide a door release mechanism of a heating cooker capable of quickly opening a door by using a motor having a small torque, and a heating cooker including the same. ..

It is a perspective view which shows the external appearance of the heating cooker of Embodiment 1 of this invention. It is a front view in the state where the front door of the above-mentioned cooking device was opened. It is a block diagram showing composition of a control device with which the above-mentioned heating cooker is provided. It is a perspective view showing composition of a latch mechanism and a door release mechanism with which the above-mentioned heating cooker is provided. It is a figure of a front door closed state showing an internal structure of a principal part to which a latch mechanism and a door release mechanism are attached. It is a perspective view of a hook formation object in which a latch hook of a latch mechanism was formed. It is an enlarged view of the part enclosed with the square of FIG. (A) is a figure which shows the state which inserted the latch lever in the predetermined position of the hook formation body, (b) is a figure which shows the state with which the closed state detection switch of the middle stage was attached and the fall of the latch lever was prevented. Is. FIG. 9A is a sectional view taken along the line AA of FIG. 8B, and FIG. 8B is a perspective view of the latch lever as seen from the side in contact with the hook forming body. It is a figure of the state where the front door is half opened which shows the internal structure of the principal part to which the latch mechanism and the door release mechanism are attached. It is a figure of the opened state of the front door 3 which shows the internal structure of the principal part to which the latch mechanism and the door release mechanism are attached. It is a figure of the state where the front door is a half-open state which shows the internal structure of the principal part to which the latch mechanism and the door release mechanism are attached in the heating cooker of Embodiment 2 of the present invention. It is a figure of the state where the front door is a half-open state which shows the internal structure of the principal part where the latch mechanism and the door release mechanism are attached in the heating cooker of Embodiment 3 of the present invention.

[Embodiment 1]
Hereinafter, one embodiment of the present invention will be described in detail. FIG. 1 is a perspective view showing an appearance of a heating cooker 1 of the present embodiment. FIG. 2 is a front view of the heating cooker 1 shown in FIG. 1 with the front door 3 open.

(Outline of cooking device 1)
As shown in FIGS. 1 and 2, the heating cooker 1 is, for example, a microwave oven, and has a front door (door) 3 that covers the heating chamber 4 on the front surface of the cooker body 2. In the present embodiment, the front door 3 is a laterally open type in which the left side (the left side when facing) is hinged. The present invention can also be applied to a door whose right side, upper side, or lower side is hinged.

The front door 3 is provided with a latch head member 21 (see FIG. 4) inside the door housing at the right end that is the open end. The latch head member 21 has latch heads (engagement portions) 22 each having an engaging claw portion 22a at its tip end at two upper and lower positions. The latch head 22 projects from

openings

3a, 3a formed in the door housing of the front door 3.

The cooker body 2 includes latch hooks (engagement receiving portions) 25, 25 (see FIG. 4) that engage with the

latch heads

22, 22 provided on the front door 3 in the body housing on the right front side, and the door release. The mechanism 10 is provided. The main body housing on the right front side of the cooker main body 2 is formed with

openings

2a, 2a for receiving the latch head 22 provided on the front door 3.

The front door 3 is closed by the latch head 22 engaging the latch hook 25. The latch head 22 and the latch hook 25 constitute a latch mechanism that holds the front door 3 in the closed state. The door release mechanism 10 is a mechanism that releases the front door 3 by releasing the engagement between the latch head 22 and the latch hook 25. Although details will be described later, the door release mechanism 10 includes a motor 12 (see FIG. 4) and electrically releases the engagement to open the front door 3.

The heating cooker 1 also has an operation panel 5 above the front door 3. The operation panel 5 is provided with a door opening switch 6 for opening the front door 3.

(Control device)
FIG. 3 is a block diagram showing a configuration of a control device included in the heating cooker 1. The control device includes a control unit 30 that controls the operation of the heating cooker 1. The control unit 30 is composed of, for example, a microcomputer and has a CPU, a ROM and a RAM. As shown in FIG. 3, the operation panel 5, the heating operation unit 31, the front door opening/closing detection unit 32, the motor 12 of the door release mechanism 10, and the like are connected to the control unit 30.

The heating operation unit 31 is an operation unit that heats the food arranged in the heating chamber 4, and is a heating device such as a microwave output device and a heater when the cooking device 1 is a microwave oven. When the control unit 30 determines that the cooking conditions are input using the operation panel 5 to instruct the start of cooking and the front door 3 is in the closed state, the heating unit 31 is operated to perform cooking. Start.

The front door open/close detection unit 32 includes three closed state detection switches SW1 to SW3 described later. When the control unit 30 receives a signal indicating that the knob 60 (see FIG. 5) is pressed from all the three closed state detection switches SW1 to SW3, the front door 3 is in the closed state. judge.

The motor 12 of the door release mechanism 10 is a motor that rotates a cam 11 (see FIG. 5) described later. The control unit 30 drives the motor 12 by operating the door opening switch 6 of the operation panel 5.

(Door release mechanism 10)
FIG. 4 is a perspective view showing the configurations of the latch mechanism and the door release mechanism 10. FIG. 5 is a diagram showing an internal structure of a main part to which the latch mechanism and the door release mechanism 10 are attached. 4 and 5, the front door 3 is in the closed state. Further, in FIG. 5, the description of the motor 12 is omitted. FIG. 6 is a perspective view of the hook forming body 40 in which the latch hook 25 of the latch mechanism is formed. FIG. 7 is an enlarged view of a portion surrounded by a square in FIG.

As shown in FIGS. 4 and 5, the latch mechanism includes the latch heads 22 and 22 provided on the front door 3 and the latch hooks 25 and 25 provided on the cooker body 2. The latch head member 21 provided with the latch heads 22 and 22 is attached in the door housing of the front door 3 so as to be vertically movable, and is urged downward by a door spring 23. By being provided in one latch head member 21, the latch heads 22 and 22 move integrally.

The latch heads 22 and 22 incline upward as they move away from the rod-shaped portion of the latch head member 21, and the tip ends bend downward. The bent tip portions are engaging

claw portions

22 a, 22 a that engage with the latch hook 25. Of the engaging

claws

22a, 22a, the lower end of the upper engaging claw 22a lifted by the latch lever 13 is rounded and is formed so as to slide smoothly with the latch lever 13.

The latch hooks 25, 25 are formed on the hook forming body 40 as shown in FIG. The hook forming body 40 is a substrate made of a resin molding that is vertically elongated. On one surface of the hook forming body 40, the closed state detection switches SW1 to SW3 for detecting the closed state of the front door 3 and the cam 11, the motor 12, the latch lever 13, and the latch spring 14 which are components of the door release mechanism 10. , A cam position detection switch 4 and the like are attached. That is, the hook forming body 40 is a support for the closed state detection switches SW1 to SW3 and the components of the door release mechanism 10.

On the front door 3 side of the latch hooks 25, 25 in the hook forming body 40,

slope portions

46, 46 are formed, which are in contact with the lower ends of the engaging

claw portions

22a, 22a of the latch heads 22, 22 when the front door 3 is opened and closed. ing.

As shown in FIGS. 4 and 5, the closed state detection switch (second switch) SW1 is attached to the upper stage of the hook forming body 40, the closed state detection switch (first switch) SW2 is in the middle stage, and the closed state detection switch SW3. Is attached to the lower tier.

The upper closed state detection switch SW1 is positioned so that the knob 60 is pressed at the tip of the engaging claw portion 22a of the upper latch head 22. The lower closed state detection switch SW3 is positioned so that the knob 60 is pressed at the lower end of the engaging claw portion 22a of the lower latch head 22. The closed state detection switch SW2 in the middle stage is pushed down by the engaging claw portion 22a of the upper latch head 22 to move downward (second direction), and the knob 60 is pushed down by the latch lever 13 reaching the lower position. Are positioned so that

The door release mechanism 10 includes a motor 12, a cam 11 rotated by the motor 12, and a linear movement in an upward direction (first direction) due to the rotation of the cam 11 to move the upper latch head 22 to a latch hook 25. At least a latch lever (linear movement member) 13 that moves in a direction to release the engagement.

The cam 11 and the motor 12 are attached to the central portion of the hook forming body 40 in the vertical direction. The motor 12 rotationally drives the cam 11, and the cam 11 is fixed to the shaft (not shown) of the motor 12. The cam 11 has a plurality of cam surfaces 11 a that slide on the lower end of the latch lever 13 and move the latch lever 13 upward. A cam position detection SW 4 is provided to detect such a position of the cam 11. The latch lever 13 is arranged between a guide long wall (guide wall) 41 and a guide short wall (guide wall) 42 formed on the hook forming body 40. The latch lever 13 is attached so as to be linearly movable in the vertical direction along the long guide wall 41 and the short guide wall 42.

The latch lever 13 has an elongated shape in the vertical direction, which is the direction of linear movement, and one end portion along the short-side direction slides on the cam 11 and the other end portion along the short-side direction. Comes into contact with the engaging claw portion 22a of the upper latch head 22. With such a shape, the door releasing mechanism 10 can be made compact in size in the front-rear direction (sliding direction, opening/closing direction).

Such a latch lever 13 is biased upward (first direction) by a latch spring 14. The latch spring 14 has an upper end hooked on a clamp 45 formed on the hook forming body 40 and a lower end hooked on a clamp 13 a formed on the latch lever 13.

The latch lever 13 linearly moves downward against the biasing force of the latch spring 14 and pushes down the knob 60 (see FIG. 4) of the closed state detection switch SW2 in the middle stage. In the present embodiment, the latch lever 13 is provided with the protrusion 24, and the protrusion 24 presses the knob 60 of the closed state detection switch SW2 in the middle stage. As a result, the closed state detection switch SW2 can be positioned more easily than the configuration in which the knob 60 is pressed down by the rotating member.

The guide long wall 41 is formed longer in the vertical direction than the guide short wall 42, and the upper end of the guide long wall 41 reaches the upper latch hook 25. The guide long wall 41 is provided with

pawl portions

43, 43 for locking the latch lever 13 and restricting the movement of the latch lever 13 in two directions orthogonal to the linear movement direction.

The

claws

43, 43 are L-shaped and are formed on the end face of the long guide wall 41 in the height direction of the wall. The

claws

43, 43 sandwich the wall portion 13b of the latch lever 13 extending in the vertical direction, and restrict the movement of the latch lever 13 only in the vertical direction. In the present embodiment, the claw portions 43 are formed at two locations separated in the vertical direction, but they may be formed at one location.

A concave escape portion 41a is formed between the claw portions 43 of the long guide wall 41, and a concave escape portion 13c is formed on the wall portion 13b of the latch lever 13. The height of the wall of the escape portion 13c is lower than that of the wall portion 13b, and is a height that does not contact the claw portion 43. These

escape portions

41a and 13c are used to avoid interference with the long guide wall 41 and the claw portion 43 when the latch lever 13 is attached to and detached from the hook forming body 40. The latch lever 13 is arranged so as to be hooked on the two

claw portions

43, 43 by utilizing the

relief portions

41a, 13c, and then the latch lever 13 is detached by attaching the closed state detection switch SW2 in the middle stage. To be prevented. This will be described with reference to FIG.

8A is a diagram showing a state where the latch lever 13 is inserted into a predetermined position of the hook forming body 40, and FIG. 8B is a state in which the closed state detection switch SW2 in the middle stage is attached and the latch lever 13 is attached. It is a figure which shows the state in which the fallout of was prevented. As shown in FIG. 8A, in the latch lever 13, the wall portion 13b is sandwiched between the

claw portions

43, 43 between the guide long wall 41 and the guide short wall 42 formed on the hook forming body 40. Inserted in. The latch lever 13 is formed with an opening 13d through which the clamp 45 formed in the hook forming body 40 is inserted. The latch lever 13 uses the inserted clamp 45 as a fulcrum to attach the lower end of the latch lever 13 to the latch head 22. It is inserted with a slight rotation in the direction away from the engaging side. At that time, the escape portion 41a formed on the long guide wall 41 avoids interference with the upper end of the latch lever 13, and the escape portion 13c formed on the wall portion 13b of the latch lever 13 interferes with the lower claw portion 43. To avoid. Thereby, the latch lever 13 can be inserted so as to be hooked on the

claw portions

43, 43. After that, as shown in FIG. 8B, the middle closed state detection switch SW2 is attached. As a result, the closed state detection switch SW2 in the middle stage becomes an obstacle, and the latch lever 13 cannot reach the position at the time of attachment/detachment that rotates around the clamp 45 shown in FIG. The latch lever 13 is prevented from falling off.

As described above, in the present embodiment, the closed state detection switch SW2 in the middle stage prevents the latch lever 13 from falling off while the

claw portions

43, 43 are engaged. The guide short wall 42 is not always necessary, and may be omitted when the latch lever 13 is stably linearly moved only by the guide long wall 41.

Also, as a more preferable configuration, the latch lever 13 is devised to reduce friction when moving linearly. In the present embodiment, the long guide wall 41 and the short guide wall 42 are provided with protrusions 44 that come into line contact with the latch lever 13. As shown in FIG. 7, in this embodiment, two long guide walls 41 and two short guide walls 42 each have two elongated projections 44 extending in the height direction of the wall, so that the latch lever 13 is always movable in the movable range. It is configured to contact the four protrusions 44. As a result, the contact area between the long guide wall 41 and the short guide wall 42 can be reduced to suppress friction, and the latch lever 13 can be moved with a smaller force. Further, by always continuing to touch the protrusions 44 provided at least at two places on one side, it is possible to eliminate rattling of the latch lever 13 in the front-rear direction. The protrusion 44 may be formed so as to extend in the width direction of the wall (the direction of linear movement), and the point is that the contact area can be reduced. When the protrusion 44 is formed to extend in the width direction of the wall, the protrusion 44 may be provided on the side of the latch lever 13 so as to come into contact with the long guide wall 41 and the short guide wall 42.

Further, in the present embodiment, as a device for reducing friction when the latch lever 13 linearly moves, the surface of the latch lever 13 that slides when linearly moving is brought into line contact with the hook forming body 40 that is the other party to slide. The convex portion 13e is provided. 9A is a sectional view taken along the line AA of FIG. 8B, and FIG. 9B is a perspective view of the latch lever 13 seen from the side in contact with the hook forming body 40. is there. By providing such a convex portion 13e, the contact between the latch lever 13 and the hook forming body 40 becomes a linear contact, and the friction when the latch lever 13 linearly moves can be effectively reduced.

(Operation of door release mechanism)
Next, the movement of the door release mechanism 10 will be described with reference to FIGS. 5, 10, and 11. 10 and 11 are diagrams showing an internal structure of a main part to which the latch mechanism and the door release mechanism 10 are attached. The description of the motor 12 is omitted in FIGS. 10 and 11. 5 shows the state where the front door 3 is closed, FIG. 10 shows the state where the front door 3 is half opened, and FIG. 11 shows the state where the front door 3 is opened.

As shown in FIG. 5, when the front door 3 is closed, the engaging

claw portions

22a, 22a of the upper and lower latch heads 22, 22 provided on the front door 3 are latch hooks provided on the cooker main body 2. 25, 25 is engaged. The latch lever 13 is in the lower position by being pushed down to the lower end of the engaging claw portion 22a of the upper latch head 22. In this state, the upper closed state detection switch SW1 is pushed down by the tip of the engagement claw portion 22a of the upper latch head 22, and the lower closed state detection switch SW3 is the engagement claw portion of the lower latch head 22. It is depressed at the lower end of 22a. Further, the closed state detection switch SW2 in the middle stage is pushed down by the protrusion 24 of the latch lever 13 that has moved to the lower position.

In such a state, when the door opening switch 6 (see FIG. 1) of the operation panel 5 is operated, the motor 12 is driven to rotate the cam 11 in the clockwise direction indicated by the arrow a. As a result, the cam surface 11a of the cam 11 and the lower end of the latch lever 13 slide with each other, the cam 11 pushes up the latch lever 13, and the latch lever 13 linearly moves upward. As a result, the closed state shown in FIG. 5 shifts to the state shown in FIG.

As shown in FIG. 10, when the latch lever 13 linearly moves upward (first direction), the upper end of the latch lever 13 lifts (pushs up) the lower end of the engaging claw portion 22a of the upper latch head 22. As a result, the engaging claw portion 22a of the lower latch head 22 that moves integrally is also lifted. When the lower ends of the engaging

claw portions

22a, 22a of the upper and lower latch heads 22, 22 get over the latch hooks 25, 25, the engagement with the latch hooks 25, 25 is released, and the state shown in FIG. 10 is changed to the state shown in FIG. Transition to the state.

As shown in FIG. 11, when the engaging

claw portions

22a, 22a of the upper and lower latch heads 22, 22 get over the latch hooks 25, 25, they are slanted along the

slope portions

46, 46 by the biasing force of the door spring 23. Guided down. In this state, since the latch lever 13 is pulled upward by the urging force of the latch spring 14, the closed state detection switch SW2 in the middle stage is not pressed.

(effect)
In the above structure, the latch lever 13 is linearly moved by the rotation of the cam 11 to move the latch head 22 in the direction of releasing the engagement with the latch hook 25. Therefore, the force obtained by driving the motor is rotated. As compared with the configuration of Patent Document 1 in which the transmission is continuously performed, the force loss can be reduced and the torque required for the motor 12 can be reduced.

As a result, a motor having a small torque can be used as the motor 12, and the range of selection of the motor 12 is widened, and the front door 3 is opened within a short time after the door opening switch 6 is pressed (quick opening). Can be done).

Further, in the above-described configuration, the protrusion 44 formed on the long guide wall 41 and the short guide wall 42, the convex portion 13e formed on the latch lever 13, and the like reduce friction when the latch lever 13 linearly moves. .. Thereby, the torque required for the motor 12 can be further reduced.

[Embodiment 2]
Another embodiment of the present invention will be described below. For convenience of description, members having the same functions as the members described in the above embodiment are designated by the same reference numerals, and the description thereof will not be repeated.

FIG. 12 shows the second embodiment and is a diagram showing an internal structure of a main part to which the latch mechanism and the door release mechanism 10A are attached. As shown in FIG. 12, the heating cooker of the present embodiment includes a door release mechanism 10A instead of the door release mechanism 10. The door release mechanism 10A is the same as the door release mechanism 10 except that the door release mechanism 10A is provided with the locking wall 48. The locking wall 48 restricts the upward movement of the latch lever 13 by hitting the latch lever 13, and prevents the latch lever 13 from contacting the knob (sensing portion) 60 of the upper closed state detection switch SW1. .. The locking wall 48 is provided below the mounting position of the upper closed state detection switch SW1 of the hook forming body 40.

By providing such a locking wall 48, when the latch lever 13 is pushed up by the cam 11 and moves upward, the tip of the latch lever 13 comes into contact with the knob 60 of the closed state detection switch SW1 in the upper stage. It is possible to reliably avoid the problem that the load is applied to the knob 60.

[Embodiment 3]
Another embodiment of the present invention will be described below. For convenience of description, members having the same functions as the members described in the above embodiment are designated by the same reference numerals, and the description thereof will not be repeated.

FIG. 13 shows the third embodiment and is a diagram showing an internal structure of a main part to which the latch mechanism and the door release mechanism 10B are attached. As shown in FIG. 13, the cooking device 1 of the present embodiment includes a door release mechanism 10B instead of the door release mechanism 10A. The door release mechanism 10B is the same as the door release mechanism 10A except that a latch lever 53 is provided instead of the latch lever 13. The latch lever 53 has an extension portion 54 that extends rearward in the sliding direction at the lower end that slides on the cam surface 11a of the cam 11. The latch lever 53 is the same as the latch lever 13 except that it has the extending portion 54.

By providing such an extended portion 54, the contact time with the cam surface 11a becomes longer, and the latch lever 53 moves the uppermost latch head 22 in the direction of lifting and releasing the engagement. Hold the position long. As a result, the latch heads 53 and 22 pass over the latch hooks 25 and 25, while the latch lever 53 is elongated in the vertical direction to suppress the dimension of the door release mechanism 10A in the front-rear direction (sliding direction). As a result, it is possible to secure a sufficient time to slide down to the

front slope portions

46, 46. As a result, the rotation speed of the motor 12 is too fast, and the latch lever moves downward before the latch heads 22 and 22 move to the position where the front door 3 is opened, and the opening of the front door 3 is not possible. It is possible to surely avoid a problem such as being sufficient.

[Summary]
In the door release mechanism of the heating cooker according to the first aspect of the present invention, the door is attached to the cooker body by engaging the engagement portion provided on the door with the engagement receiving portion provided on the cooker body. A door release mechanism of a heating cooker which is closed to the other side, wherein a motor provided in the cooker body, a cam provided in the cooker body and rotated by the motor, and the cooker body A linear movement member that is linearly moved in the first direction by the rotation of the cam to move the engagement portion in a direction of releasing the engagement with the engagement receiving portion.

A door release mechanism for a heating cooker according to a second aspect of the present invention is, in the first aspect, provided with a guide wall that guides the linear movement of the linear movement member, and the guide wall engages the linear movement member to linearly move. It is also possible to adopt a configuration in which a claw portion that restricts movement of the linear movement member in two directions orthogonal to the movement direction is provided.

In the door release mechanism of the heating cooker according to the third aspect of the present invention, in the second aspect, the first switch that detects the closed state of the door is disengaged from the linear movement member when the claw portion is engaged. It is also possible to adopt a configuration in which

The door release mechanism of the heating cooker according to the fourth aspect of the present invention may be configured such that, in the second or third aspect, the guide wall is provided with a protrusion that comes into line contact with the linear movement member.

In the door release mechanism of the heating cooker according to the fifth aspect of the present invention, in any one of the first to fourth aspects, the linear moving member has an elongated shape in a linear moving direction, and one of the linear moving members extends in the lateral direction. It is also possible that the end portion slides on the cam and the other end portion along the lateral direction abuts on the engaging portion.

In the door release mechanism of the heating cooker according to aspect 6 of the present invention, in any one of aspects 1 to 5, the surface of the linear movement member that slides during linear movement makes line contact with a sliding counterpart member. It is also possible to adopt a configuration in which a convex portion is provided.

In the door release mechanism of the heating cooker according to aspect 7 of the present invention, in any one of aspects 1 to 6, the linear movement member is biased in the first direction, and the linear movement member is the engagement member. When the joint portion engages with the engagement receiving portion, it linearly moves in the second direction opposite to the first direction against the biasing force, and presses the first switch that detects the closed state of the door. It can also be configured.

A door release mechanism of a heating cooker according to an eighth aspect of the present invention is the door release mechanism according to any one of the first to seventh aspects, wherein the engagement portion engages the engagement receiving portion to detect the closed state of the door. The second switch is provided so as to be pressed, and the movement of the linear movement member in the first direction is regulated by hitting the linear movement member, so that the linear movement member comes into contact with the sensitive portion of the second switch. It is also possible to adopt a configuration including a locking wall for blocking.

A door release mechanism for a heating cooker according to aspect 9 of the present invention is the door release mechanism according to aspect 5, wherein the linear movement member has an end portion on the side that slides with the cam and extends rearward in the sliding direction. It is also possible to have a configuration having a part.

A heating cooker according to a tenth aspect of the present invention includes a cooker main body, a door provided on the cooker main body so as to be openable and closable, and the door release mechanism according to any one of the first to ninth aspects. Characterize.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention. Further, new technical features can be formed by combining the technical means disclosed in each embodiment.

Claims

A door release mechanism of a heating cooker in which the door is closed with respect to the cooker body by engaging an engaging portion provided on the door with an engagement receiving portion provided on the cooker body. ,
A motor provided in the cooker body,
A cam provided on the cooker body and rotated by the motor,
A linear movement member which is provided in the cooker body and linearly moves in a first direction by rotation of the cam to move the engagement portion in a direction in which the engagement with the engagement receiving portion is released.
A door release mechanism comprising:
A guide wall for guiding the linear movement of the linear movement member,
2. The guide wall is provided with a claw portion that restricts the movement of the linear movement member in two directions orthogonal to the direction in which the linear movement member is engaged and linearly moves. Door release mechanism described.
The door release mechanism according to claim 2, wherein the first switch that detects the closed state of the door prevents the linear movement member from falling off when the claw portion is engaged.
The door release mechanism according to claim 2 or 3, wherein the guide wall is provided with a protrusion that makes a line contact with the linear movement member.
The linear movement member has an elongated shape in the direction of linear movement, one end along the lateral direction slides with the cam, and the other end along the lateral direction is the engaging portion. The door release mechanism according to any one of claims 1 to 4, wherein the door release mechanism is in contact with the door release mechanism.
6. A convex portion that is in line contact with a sliding counterpart member is provided on a surface of the linear movement member that slides during linear movement. Door release mechanism.
The linear moving member is biased in the first direction,
The linear movement member linearly moves in a second direction opposite to the first direction against the biasing force when the engagement portion engages with the engagement receiving portion, and closes the door. The door release mechanism according to any one of claims 1 to 6, wherein the first switch for detecting is pressed.
The engagement portion is provided so as to press the second switch that detects the closed state of the door by engaging with the engagement receiving portion,
A locking wall is provided that restricts the movement of the linear movement member in the first direction by abutting the linear movement member, and prevents the linear movement member from contacting the sensitive portion of the second switch. The door release mechanism according to any one of claims 1 to 7.
The door releasing mechanism according to claim 5, wherein an extension portion extending rearward in the sliding direction is provided at an end of the linear movement member that slides on the cam.
The cooker body,
A door provided on the cooker body so that it can be opened and closed,
A door release mechanism according to any one of claims 1 to 9,
A cooking device characterized by comprising: