Heating and conditioning device

Abstract

To provide a cooking device that allows a user to draw out a placement part more than ever due to improvement of making an arm constituting a link member made hardly contact the user.SOLUTION: An oven toaster 1 being a cooking device includes a door 3 pivoted on a body 2 having a baking chamber 15 therein to be able to open and close a front opening part 14; and a link mechanism 5 for linking the opening / closing of the door 3 with advancing / retreating, through the front opening part 14, of a placement part 4. The link mechanism 5 includes: an arm 51 with a front end being swingably supported on the door 3 and with a rear side formed with a first rack 52; a first pinion gear 53 engaged with the first rack 52; a second pinion gear 56 with a pitch circle rotating at linear velocity faster than linear velocity of the first pinion gear 53, a second rack 57 engaged with the second pinion gear 56; and a tension coil spring 58 being an energization member for energizing a rear side of the arm 51 backward and toward the first pinion gear 53 side. Therein, the second rack 57 is connected to the placement part 4.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a cooking device such as an oven toaster in which a placement part for food such as a baking net protrudes from a main body opening by opening a door.

Background Art

[0002] Conventionally, as this type of cooking device, there are a main body part (corresponding to the main body of the present invention) having an opening formed in the front and a cooking chamber (corresponding to the baking chamber of the present invention) inside, an opening / closing door (corresponding to the door of the present invention) for opening and closing the opening of the main body part, and a link member (corresponding to the arm of the present invention) as a link mechanism for moving a cooking net (corresponding to the placement part of the present invention) back and forth in conjunction with the opening and closing of the opening / closing door (see, for example, Patent Document 1). And, in such a cooking device, by connecting the front end of the link member near the upper end of the opening / closing door, the cooking net can be largely pulled forward in conjunction with the operation of opening the opening / closing door.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in such a heating cooking device, if the amount the cooking net can be pulled out is to be increased, the front end of the link member must be connected to the vicinity of the upper end of the opening / closing door. When the opening / closing door is open, the front end of the link member is located in front of the cooking net, so even if the link member is located below the cooking net, there is a risk of the front end of the link member being touched. Furthermore, the amount the cooking net can be pulled out is approximately the same as the difference between the amount the link member can be pulled out and the length of the link groove formed in the link member, but this is not sufficient to place the food to be cooked in the back of the cooking net without touching the main body which has become hot due to heating, and a structure that allows the cooking net to be pulled out further is required. Moreover, in a structure that allows the cooking net to be pulled out further, the appliance support on which the cooking net rests is located in the front part of the internal space of the main body, so when trying to remove the cooking net and clean the internal space of the main body, the appliance support gets in the way and makes cleaning difficult.

[0005] The present invention aims to solve the above problems and provide a heating and cooking device that makes it difficult to touch the arms constituting the link member, allows the mounting section to be extended further, and allows for easy cleaning of the baking chamber. [Means for solving the problem]

[0006] A heating cooking device according to claim 1 of the present invention comprises a main body having an opening formed on the front and a baking chamber inside, a door pivotally supported on the main body and capable of opening and closing the opening, a mounting part that extends and retracts from the opening as the door opens and closes, and a link mechanism that links the movement of the door with the movement of the mounting part, wherein the link mechanism comprises an arm whose front end is pivotably supported by the door and which has a first rack formed on its rear side, a first pinion gear that meshes with the first rack, and a linear speed faster than the linear speed of the pitch circle of the first pinion gear as the first pinion gear rotates The device comprises a second pinion gear whose pitch circle rotates in degrees, a second rack that meshes with the second pinion gear, and a biasing member that biases the rear side of the arm backward and toward the first pinion gear, wherein the second rack is coupled to the aforementioned mounting portion, guide members extending in the front-rear direction are provided on the left and right walls of the firing chamber, respectively, and detachable guide receiving portions are provided on the left and right sides of the aforementioned mounting portion relative to each guide member, respectively, and the arm is supported by the door such that the arm can swing in a direction away from the first pinion gear against the biasing force of the biasing member.

[0007] Furthermore, the heating cooking apparatus according to claim 2 of the present invention is provided in claim 1, wherein the arm is provided with a non-formed portion of the first rack such that the first rack engages with the first pinion gear when the door pivots to a predetermined angle.

[0008] Furthermore, the heating cooking apparatus according to claim 3 of the present invention is further characterized in that, in claim 1, the second pinion gear is provided below the second rack. [Effects of the Invention]

[0009] The heating and cooking apparatus described in claim 1 of the present invention, when configured as described above, allows the extension of the aforementioned mounting section to be the maximum extension that can stably hold the food to be cooked, even if the support position of the front end of the arm on the door is set closer to the pivot of the door, by appropriately adjusting the ratio of the linear velocities of the outer circumference of the first pinion gear and the second pinion gear. This reduces the risk of touching the arm when the door is opened. Furthermore, when the aforementioned mounting section is pulled further forward from its maximum protruding state, the first pinion gear rotates in conjunction with the second pinion gear and the second rack, but the engagement between the first rack and the first pinion gear is temporarily released, causing it to spin freely, so the aforementioned mounting section can be removed from the main body. This allows for easy cleaning of the baking chamber.

[0010] Furthermore, by providing a non-formed portion of the first rack on the arm such that the first rack engages with the first pinion gear when the door is pivoted to a predetermined angle, the aforementioned mounting portion is not pulled forward from the time the door starts to open until it pivots to a predetermined angle, thus preventing the door and the mounting portion from colliding in the initial stages of opening.

[0011] Furthermore, by positioning the second pinion gear below the second rack, it is possible to prevent the second pinion gear from getting in the way when placing food to be cooked in the aforementioned storage area. [Brief explanation of the drawing]

[0012] [Figure 1] This is a perspective view of a heating and cooking device showing one embodiment of the present invention. [Figure 2] This is a perspective view from a different angle, with a portion of the part removed. [Figure 3] This is a perspective view of the link mechanism in a disassembled state. [Figure 4] This is an explanatory diagram showing the closed door as viewed from the outside. [Figure 5] This is an explanatory diagram showing the door in an open position (angle A), as viewed from the outside. [Figure 6]This is an explanatory diagram showing the door opened to angle B, as viewed from the outside. [Figure 7] This is an explanatory diagram showing the door fully open, as viewed from the outside. [Figure 8] This is an explanatory diagram showing the closed door as viewed from the firing chamber side. [Figure 9] This is an explanatory diagram showing the door in the open position (angle A) as viewed from the firing chamber side. [Figure 10] This is an explanatory diagram showing the door opened to angle B, as viewed from the firing chamber side. [Figure 11] This is an explanatory diagram showing the door fully open, as viewed from the firing chamber side. [Modes for carrying out the invention]

[0013] Embodiments of the present invention will be described below with reference to Figures 1 to 11. Figure 1 is an oven toaster as a heating cooking device of the present invention. This oven toaster 1 is composed of a main body 2, a door 3, a mounting section 4, and a link mechanism 5.

[0014] The main body 2 is composed of an inner wall portion 11, an outer wall portion 12, and a front wall portion 13. The inner wall portion 11 is formed in a box shape with an opening 14 on the front side and has a right side wall 11R and a left side wall 11L. A firing chamber 15 is formed within this inner wall portion 11. Guide members 16R and 16L are attached to the inner surfaces of the right side wall 11R and the left side wall 11L at the same height and horizontally in the front-rear direction. These guide members 16R and 16L each have grooves 17R and 17L formed in the longitudinal direction, and these grooves 17R and 17L face each other. The grooves 17R and 17L are provided horizontally and parallel to each other. Therefore, the distance between the bottoms of the respective grooves 17R and 17L is slightly narrower than the distance between the right side wall 11R and the left side wall 11L. Furthermore, at the front ends of the grooves 17R and 17L, guide portions 18R and 18L are formed, where the spacing between the grooves 17R and 17L widens towards the front. Except for these guide portions 18R and 18L, the width of the grooves 17R and 17L is constant. At the rear ends of the grooves 17R and 17L, an end wall 19 is formed that defines the rear end of the grooves 17R and 17L. In addition, a bearing hole (not shown) is formed on the front side of the right side wall 11R and below the guide member 16R. The outer wall portion 12 covers the inner wall portion 11 from the outside, and like the inner wall portion 11, its front side is open. The front wall portion 13 is provided so as to connect the front opening 14 of the inner wall portion 11 and the open front side of the outer wall portion 12. Furthermore, a vertically elongated through groove 20 is formed on the right side of the front wall portion, through which the arm 51 of the link mechanism 5, which will be described later, passes. Furthermore, the main body 2 is provided with main body side bearing portions 21R and 21L on the left and right sides of the lower front side, respectively.

[0015] The door 3 comprises a door body 31, a handle 32 provided on the upper part of the door body 31, door-side bearing portions 33R and 33L provided on the lower part of the door body 31, and an arm bearing portion 34 provided on the right side of the door body 31 and on the firing chamber 15 side. The door-side bearing portions 33R and 33L are provided in correspondence with the body-side bearing portions 21R and 21L and are pivotally connected by pivots 35R and 35L. As a result, the door 3 is pivotally supported on the body 2.

[0016] The placement part 4 is configured to include a placement part main body 41 and a wire mesh 42 that is detachably placed above the placement part main body 41. The placement part main body 41 is formed in a substantially rectangular shape by a metal wire, and guide receiving parts 43R and 43L that respectively protrude left and right are provided on the back side of the placement part main body 41. The vertical dimension of these guide receiving parts 43R and 43L is slightly smaller than the vertical width of the groove parts 17R and 17L formed in the guide members 16R and 16L. Also, the distance between the right end of the guide member 43R and the left end of the guide member 43L is slightly smaller than the distance between the bottoms of the respective groove parts 17R and 17L, and is formed to be a dimension such that it does not deviate downward from the groove parts 17R and 17L. That is, the distance between the right end of the guide member 43R and the left end of the guide member 43L is smaller than the distance between the right side wall 11R and the left side wall 11L, in other words, smaller than the width of the opening 14. Further, at the lower part of the right end of the placement part main body 41, a second rack 57, which will be described later of the link mechanism 5, is coupled so as to extend in the front-rear direction.

[0017] The link mechanism 5 is configured to include an arm 51 formed with a first rack 52, a first pinion gear 53, a large-diameter gear 54, a small-diameter gear 55, a second pinion gear 56, a second rack 57, a tension coil spring 58 as a biasing member, and a stopper 59. The arm 51, the first pinion gear 53, the large-diameter gear 54, the small-diameter gear 55, the tension coil spring 58, and the stopper 59 are provided on the outer surface side of the right side wall 11R. On the other hand, the second pinion gear 56 is provided on the inner surface side of the right side wall 11R. Further, as described above, the second rack 57 is coupled to the placement part main body 41 that constitutes the placement part 4 provided in the firing chamber 15.

[0018] The arm 51 has a bearing hole 60 formed at its front end and a hook hole 61 formed at its rear end. The arm 51 is pivotably supported relative to the door 3 by connecting the bearing hole 60 of the arm 51 to the arm bearing portion 34 of the door 3 using a pivot shaft 62. Meanwhile, one end of the tension coil spring 58 hooks onto the hook hole 61 of the arm 51, and the other end of the tension coil spring 58 hooks onto the upper rear part of the main body 2. As a result, the rear end of the arm 51 is biased diagonally upward and rearward. The first rack 52 is formed on the rear side of the upper edge of the arm 51. The area between the front end and the first rack 52 on the upper edge of the arm 51 is a non-formed portion 63 of the first rack 52. Furthermore, a notch 64 is formed near the center of the lower edge of the arm 51. The notch 64 has one side edge 64A cut out obliquely with respect to the length direction of the arm 51, and the other side edge 64B cut out substantially perpendicular to the length direction of the arm 51. The other side edge 64B then comes into contact with the stopper 59, thereby limiting the opening angle of the door 3 to angle C.

[0019] The first pinion gear 53 and the large-diameter gear 54 are mounted on a shaft portion 65 provided on the outer surface of the right side wall 11R so as to rotate coaxially and integrally. The first pinion gear 53 and the large-diameter gear 54 may be formed as a single unit. The first pinion gear 53 is positioned above the arm 51. Therefore, the rear end of the arm 51 is biased upward by the tension coil spring 58, causing the arm 51 to be pressed against the first pinion gear 53. A pair of guide discs 66, 66, larger in diameter than the first pinion gear 53, are provided on both axial sides of the first pinion gear 53. By positioning the arm 51 between these guide discs 66, 66, the first rack 52 and the first pinion gear 53 can be prevented from becoming misaligned. The first rack 52 and the first pinion gear 53 mesh when the door 3 is opened.

[0020] The small-diameter gear 55 is always meshed with the large-diameter gear 54 and is formed to be smaller in diameter than the large-diameter gear 54. That is, the large-diameter gear 54 and the small-diameter gear 55 constitute a speed-increasing mechanism. Furthermore, a pair of guide discs 67, 67, which are larger in diameter than the small-diameter gear 55, are provided on both sides of the axial direction of the small-diameter gear 55. By positioning the large-diameter gear 54 between these guide discs 67, 67, the large-diameter gear 54 and the small-diameter gear 55 can be prevented from becoming misaligned. The small-diameter gear 55 is fixed to the outer end of a pivot shaft 68 which is fixed to a bearing hole (not shown) as described above.

[0021] The second pinion gear 56 is fixed to the inner end of the pivot shaft 68. This configures the second pinion gear 56 to rotate coaxially and integrally with the small-diameter gear 55. The second pinion gear 56 is also constantly meshed with the second rack 57. Furthermore, a pair of guide discs 69, 69, which are larger in diameter than the second pinion gear 56, are provided on both axial sides of the second pinion gear 56. By positioning the second rack 57 between these guide discs 69, 69, the second rack 57 and the second pinion gear 56 can be prevented from becoming misaligned.

[0022] The ratio of the distance L that the first pinion gear 53 rotates in the circumferential direction of its pitch circle to the distance M that the second pinion gear 56 rotates in the circumferential direction of its pitch circle, i.e., the gear ratio G, is expressed by the following formula, where R1 is the radius of the pitch circle of the first pinion gear 53, R2 is the radius of the pitch circle of the large diameter gear 54, R3 is the radius of the pitch circle of the small diameter gear 55, and R4 is the radius of the pitch circle of the second pinion gear 56. Note that, in order to simplify the calculation, backlash between each gear is not considered. G = (R2 / R1) × (R4 / R3) In this embodiment, since the pitch of each gear is equal, it can be expressed as a ratio of the number of teeth. That is, the gear ratio G is expressed by the following formula, where T1 is the number of teeth of the first pinion gear 53, T2 is the number of teeth of the large diameter gear 54, T3 is the number of teeth of the small diameter gear 55, and T4 is the number of teeth of the second pinion gear 56. G = (T2 / T1) × (T4 / T3) In this embodiment, as shown in Figures 4 to 11, T1 = T3 = T4 = 26. Also, although there is a portion hidden by the arm 51, T2 = 90. Therefore, in this embodiment, the gear ratio G ≈ 3.46. This means that the second pinion gear 56 rotates at a linear velocity approximately 3.46 times that of the first pinion gear 53. Furthermore, when the first pinion gear 53 rotates by a distance L in the circumferential direction of its pitch circle, the second pinion gear 56 rotates by a distance of approximately 3.46L in the circumferential direction of its pitch circle.

[0023] In this embodiment, for the sake of simplicity, the description of the heater, control panel, etc., provided in the oven toaster 1 will be omitted.

[0024] Next, the operation of this embodiment will be described. In the initial state shown in Figures 4 and 8, the first rack 52 and the first pinion gear 53 are not meshed, and the teeth of the first pinion gear 53 are in contact with the non-formed portion 63 of the first rack 52. From this state, the user grasps the handle 32 and pulls it forward. This causes the door 3 to pivot around the pivots 35R and 35L. As the door 3 pivots, the arm 51 of the link mechanism 5 is also pulled forward. At this time, the arm 51 swings around the pivot axis 62. Furthermore, as mentioned above, the rear end of the arm 51 is biased upward and rearward by the tension coil spring 58, so the arm 51 is continuously pressed against the teeth of the first pinion gear 53. In addition, the guide discs 66, 66 prevent the arm 51 from disengaging from the teeth of the first pinion gear 53. Then, the teeth of the first pinion gear 53 remain in contact with the non-formed portion 63 due to the biasing force of the tension coil spring 58, without engaging with the first rack 52 until the door 3 pivots at angle A and reaches the state shown in Figures 5 and 9. That is, the first pinion gear 53, the large diameter gear 54, the small diameter gear 55, and the second pinion gear 56 do not rotate until the door 3 pivots at angle A. Consequently, the mounting body 41 of the mounting portion 4 to which the second rack 57 is connected does not move forward until the door 3 pivots at angle A. Then, as the door 3 pivots at angle A, the first rack 52 and the first pinion gear 53 engage, as shown in Figure 5.

[0025] When the door 3 is pulled further forward from the state shown in Figures 5 and 9, and the door 3 is pivoted around the pivots 35R and 35L, the first pinion gear 53, which is meshed with the first rack 52, rotates as the first rack 52 moves forward. As the first pinion gear 53 rotates, the large-diameter gear 54 rotates at the same angular velocity as the first pinion gear 53. The distance that the large-diameter gear 54 rotates in the circumferential direction of its pitch circle is longer than that of the first pinion gear 53. The small-diameter gear 55, which meshes with the large-diameter gear 54, rotates the same distance in the circumferential direction of its pitch circle as the large-diameter gear 54. Furthermore, since the second pinion gear 56 has the same pitch circle radius and number of teeth as the small-diameter gear 55, it rotates the same distance in the circumferential direction of its pitch circle as the large-diameter gear 54 and the small-diameter gear 55. As mentioned above, since the gear ratio G is approximately 3.46, the distance that the second pinion gear 56 rotates in the circumferential direction along the pitch circle is approximately 3.46 times that of the first pinion gear 53. Furthermore, the mounting body 41 to which the second rack 57 that meshes with the second pinion gear 56 is coupled moves forward along the grooves 17R, 17L of the guide members 16R, 16L by the same distance that the second pinion gear 56 rotates in the circumferential direction. That is, the mounting body 41 slides along the grooves 17R, 17L of the guide members 16R, 16L.

[0026] Furthermore, when the door 3 pivots to angle C, the other end edge 64B of the notch 64 formed in the arm 51 comes into contact with the stopper 59, limiting the further forward pivot of the door 3. At this time, since one end edge 64A of the notch 64 is cut diagonally with respect to the length direction of the arm 51, the stopper 59 can be smoothly received into the notch 64. In this state, the first rack 52 meshes with the first pinion gear 53 over a distance Lmax (however, this is not an exact value because the meshing position fluctuates) from Figure 5 to Figure 7, and the aforementioned mounting part 4 moves forward by a distance Mmax (≒3.46Lmax).

[0027] With this gear ratio G, there is a possibility that the front end of the mounting part 4 described above may collide with the surface of the door 3 on the firing chamber 15 side when the door 3 is pivoted. However, as mentioned above, the mounting part 4 does not move forward until the door 3 pivots at angle A, so a collision between the mounting part 4 and the door 3 can be prevented. By optimizing the pivot angle A of the door 3 at which the mounting part 4 does not move, and the gear ratio G between the first pinion gear 53 and the second pinion gear 56, it is possible to maximize the forward protrusion of the mounting part 4 while preventing a collision between the mounting part 4 and the door 3. When the door 3 is fully open, the front end of the arm bearing part 34, i.e., the arm 51, is behind the front end of the mounting part 4. Also, when the door 3 is fully open, the portion of the arm 51 that protrudes from the through groove 20 is below the mounting part 4. Therefore, it is possible to make it difficult for the user to touch the arm 51.

[0028] Furthermore, when the door 3 is pivoted to close, the opposite action occurs compared to when it is pivoted to open.

[0029] As described above, the distance between the right end of the guide member 43R and the left end of the guide member 43L is smaller than the width of the opening 14, and the rear end of the arm 51 is a free end. Therefore, when the mounting body 41 is pulled forward along the grooves 17R and 17L from the state shown in Figures 7 and 11, the mounting body 41 disengages from the grooves 17R and 17L of the guide members 16R and 16L. At this time, since the second rack 57 is engaged with the second pinion gear 56, pulling the mounting body 41 generates a force that rotates the second pinion gear 56, and consequently the first pinion gear 53. In this case, the rear end of the arm 51, on which the first rack 52 that meshes with the first pinion gear 53 is formed, is a free end. As the first pinion gear 53 rotates, the first rack 52 moves away from the first pinion gear 53, temporarily disengaging it. That is, the first pinion gear 53 rotates freely relative to the first rack 52. When the first pinion gear 53 rotates by one pitch, the first rack 52, which was temporarily disengaged from the first pinion gear 53, re-engages with the first pinion gear 53 due to the biasing force of the tension coil spring 58. This process is repeated, and the mounting body 41 is removed from the grooves 17R and 17L of the guide members 16R and 16L, that is, from the firing chamber 15. By removing the mounting body 41 from the firing chamber 15 in this way, the inside of the firing chamber 15 can be easily cleaned.

[0030] After cleaning the firing chamber, the mounting body 41 can be reinstalled in the firing chamber 15 by pushing the guide receiving portions 43R and 43L of the mounting body 41 into the grooves 17R and 17L of the guide members 16R and 16L. That is, when the door 3 is fully open at an angle C, pushing the guide receiving portions 43R and 43L of the mounting body 41 along the grooves 17R and 17L of the guide members 16R and 16L causes the second rack 57 to come into contact with the second pinion gear 56. At this time, as mentioned above, since the front ends of the guide members 16R and 16L are each formed with guide portions 18R and 18L, the guide receiving portions 43R and 43L of the mounting body 41 can be easily inserted into the grooves 17R and 17L. Then, when the mounting body 41 described above is pushed along the grooves 17R and 17L, the second pinion gear 56 rotates and the second rack 57 and the second pinion gear 56 mesh. When these mesh, a force acts to rotate the small diameter gear 55, the large diameter gear 54 and the first pinion gear 53, similar to when the mounting body 41 described above is removed from the grooves 17R and 17L of the guide members 16R and 16L. At this time, since the rear end of the arm 51 on which the first rack 52 that meshes with the first pinion gear 53 is formed is a free end, the first rack 52 moves away from the first pinion gear 53 as the first pinion gear 53 rotates, and the meshing is temporarily released. In other words, the first pinion gear 53 rotates freely relative to the first rack 52. Then, when the first pinion gear 53 rotates by one pitch, the first rack 52, which has been temporarily disengaged from the first pinion gear 53, re-engages with the first pinion gear 53 due to the biasing force of the tension coil spring 58. As this is repeated, the mounting body 41 described above is reattached to the grooves 17R and 17L of the guide members 16R and 16L, that is, to the firing chamber 15.

[0031] In this case, the relative positional relationship between the door 3, the guide members 16R, 16L, and the mounting body 41 does not need to be precise. That is, when the door 3 is fully open at an angle C, it is desirable that the mounting body 41 is in the specified position shown in Figures 7 and 11 relative to the grooves 17R, 17L of the guide members 16R, 16L, but it is also acceptable to install the mounting body 41 so that it is further back than this specified position. However, when the door 3 is fully open at an angle C, it is undesirable for the mounting body 41 to be in front of the specified position, as this may cause the door 3 and the mounting body 41 to collide when the door 3 is closed.

[0032] For example, when the door 3 is pivoted to close with the mounting body 41 installed further back than the specified position, the arm 51 of the link mechanism 5 is pulled into the body 2 by the biasing force of the tension coil spring 58 as a result of this pivoting. At this time, the arm 51 swings around the pivot axis 62. Also, as mentioned above, the rear end of the arm 51 is biased upward and rearward by the tension coil spring 58, so the first rack 52 of the arm 51 remains engaged with the first pinion gear 53. Therefore, when the door 3 is pivoted to close, the first rack 52 moves backward, rotating the first pinion gear 53. This rotation causes the large-diameter gear 54, the small-diameter gear 55, and the second pinion gear 56 to rotate. Furthermore, the second rack 57, which meshes with the second pinion gear 56, and consequently the aforementioned mounting body 41 to which the second rack 57 is connected, move inward along the grooves 17R and 17L. However, since the aforementioned mounting body 41 is installed further inward than the specified position, before the door 3 reaches the position shown in Figures 5 and 9, the guide receiving portions 43R and 43L of the aforementioned mounting body 41 come into contact with the end walls 19 of the guide members 16R and 16L, preventing it from moving any further inward. In other words, the movement of the second rack 57 stops. As a result, the second pinion gear 56, which is meshed with the second rack 57, and the small-diameter gear 55, large-diameter gear 54, and first pinion gear 53, which are linked to the second pinion gear 56, also stop moving. Furthermore, in this state, since the first rack 52 and the first pinion gear 53 are meshed, the movement of the arm 51 on which the first rack 52 is formed also stops. Therefore, the biasing force of the tension coil spring 58 prevents the door 3 from pivoting any further.

[0033] However, if the user further pivots the door 3 to close it, as mentioned above, the rear end of the arm 51 is a free end, and as the arm 51 moves backward, the first rack 52 moves away from the first pinion gear 53, temporarily disengaging them. That is, the teeth of the first rack 52 move over the teeth of the first pinion gear 53. Then, when the first rack 52 moves by one pitch, the first rack 52, which has temporarily disengaged from the first pinion gear 53, re-engages with the first pinion gear 53 due to the biasing force of the tension coil spring 58. This is repeated, allowing the door 3 to be pivoted to close. When the door 3 is pivoted to angle A, the engagement between the first rack 52 and the first pinion gear 53 is disengaged, and the first pinion gear 53 comes into contact with the unformed portion 63 of the first rack 52 on the arm 51. As a result, the arm 51 is pulled backward by the biasing force of the tension coil spring 58 and moves, and the door 3 is also pulled by the arm 51 and closes, returning to the state shown in Figures 4 and 8.

[0034] Thus, the ease with which the mounting part 4 described above can be attached to and detached from the main body 2 not only improves the cleanability of the baking chamber 15, but also improves the ease of assembly during the manufacturing of the oven toaster 1.

[0035] As described above, the present invention provides an oven toaster 1 as a heating cooking device having a main body 2 having an opening 14 formed on the front and a baking chamber 15 inside, a door 3 pivotally supported on the main body 2 and capable of opening and closing the opening 14, a mounting part 4 that extends and retracts from the opening 14 as the door 3 is opened and closed, and a link mechanism 5 that links the movement of the door 3 and the movement of the mounting part 4, wherein the link mechanism 5 comprises an arm 51 whose front end is pivotably supported on the door 3 and which has a first rack 52 formed on its rear side, a first pinion gear 53 that meshes with the first rack 52, and a linear gear that rotates faster than the linear velocity of the pitch circle of the first pinion gear 53 as the first pinion gear 53 rotates The device includes a second pinion gear 56 whose pitch circle moves with speed, a second rack 57 that meshes with the second pinion gear 56, and a tension coil spring 58 as a biasing member that biases the rear side of the arm 51 backward and toward the first pinion gear 53. The second rack 57 is coupled to the aforementioned mounting section 4. Even if the arm bearing section 34, which is the support position for the front end of the arm 51 in the door 3, is positioned closer to the pivots 35R and 35L of the door 3, the extension amount Mmax of the aforementioned mounting section 4 can be set to the maximum extension amount that allows for stable placement of the food to be cooked by appropriately adjusting the ratio of the outer peripheral linear velocities of the first pinion gear 53 and the second pinion gear 56, i.e., the gear ratio G. This reduces the risk of touching the arm 51 when the door 3 is opened.

[0036] Furthermore, the present invention provides the arm 51 with a non-formed portion 63 of the first rack 52 such that the first rack 52 engages with the first pinion gear 53 when the door 3 is pivoted to a predetermined angle A. As a result, the aforementioned mounting portion 4 is not pulled forward from the time the door 3 starts to open until it pivots to the predetermined angle A, thus preventing the door 3 and the mounting portion 4 from colliding in the initial stages of opening the door 3.

[0037] Furthermore, guide members 16R and 16L extending in the front-rear direction are provided on the left and right walls of the firing chamber, respectively, and guide receiving parts 43R and 43L that can be attached to and detached from the front of each guide member 16R and 16L are provided on the left and right sides of the mounting body 41 of the mounting part 4 described above. In addition, the arm 51 is supported by the door 3 so that the arm 51 can swing in a direction that moves the first rack 52 away from the first pinion gear 53 against the biasing force of the tension coil spring 58. When the mounting body 41 described above is pulled further forward from its maximum protruding state, the first pinion gear 53 rotates in conjunction with the second pinion gear 56 and the second rack 57, but the meshing between the first rack 52 and the first pinion gear 53 is temporarily released and it spins freely, so the mounting body 41 described above can be removed from the body 2. For this reason, the inside of the firing chamber 15 can be easily cleaned.

[0038] Furthermore, by positioning the second pinion gear 56 below the second rack 57, the second pinion gear 56 can be prevented from getting in the way when placing food to be cooked in the aforementioned storage section 4.

[0039] It should be noted that the present invention is not limited to the embodiments described above, and various modifications can be implemented within the scope of the gist of the invention. For example, in the above embodiments, a speed-increasing mechanism consisting of a large-diameter gear and a small-diameter gear is provided between the first pinion gear and the second pinion gear, but a speed-increasing mechanism of other types may be provided. In addition, the second pinion gear may be provided coaxially and integrally with the first pinion gear, and the pitch diameter of the second pinion gear may be made larger than the pitch diameter of the first pinion gear. [Explanation of symbols]

[0040] 1. Toaster oven (heating device) 2 Main unit 3 doors 4 Mounting section 5 Link mechanism 14 Opening 15. Firing Chamber 16R,16L guide member 17R,17L Groove 21R, 21L Main body side bearing part 33R,33L Door side bearing part 34 Arm bearing section 35R, 35L Axis 51 Arm 52 First Rack 53 First pinion gear 56 Second pinion gear 57 Second rack 58. Tension coil spring (biasing member) 60 Bearing hole 62. Oscillating axis 63 Non-formed part A angle C angle G gear ratio L distance Lmax distance M distance Mmax distance R1 is the radius of the pitch circle of the first pinion gear 53. R4 Radius of the pitch circle of the second pinion gear 56 T1 First pinion gear 53 teeth T4 Second pinion gear, 56 teeth

Claims

1. A heating and cooking device comprising a main body having an opening formed on the front and a baking chamber inside, a door pivotally supported on the main body and capable of opening and closing the opening, a mounting part that extends and retracts from the opening as the door opens and closes, and a link mechanism that links the movement of the door with the movement of the mounting part, The link mechanism comprises an arm whose front end is pivotably supported by the door and which has a first rack formed on its rear side; a first pinion gear that meshes with the first rack; a second pinion gear whose pitch circle rotates at a linear velocity faster than the linear velocity of the pitch circle of the first pinion gear as the first pinion gear rotates; a second rack that meshes with the second pinion gear; and a biasing member that biases the rear side of the arm backward and toward the first pinion gear, wherein the second rack is connected to the mounting part described above. A heating and cooking apparatus characterized in that guide members extending in the front-rear direction are provided on both the left and right walls of the baking chamber, guide receiving parts that can be attached to and detached from the front are provided on both the left and right sides of the mounting part, and the arm is supported by the door such that the arm can swing in a direction away from the first pinion gear against the biasing force of the biasing member.

2. The heating cooking apparatus according to claim 1, characterized in that the arm is provided with a non-formed portion of the first rack such that the first rack engages with the first pinion gear when the door pivots to a predetermined angle.

3. The heating and cooking apparatus according to claim 1, characterized in that the second pinion gear is provided below the second rack.

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