KR100387977B1 - Timer for microwave oven and microwave oven with the timer mounted thereon - Google Patents

Abstract

The verticality of the timer axis and the conversion axis is maintained. In addition, there is no difference between the display state of the conversion shaft and the actual setting state. Another object of the present invention is to make it possible to adapt a large case and to cope with a case where the attachment angle to other equipment is different or to change the distance between the axis of the timer shaft and the conversion shaft.

In order to solve this problem, the microwave oven timer 1 has at least a range by operating a timer unit 4 having a timer shaft 2 for setting a cooking time and a conversion shaft 5 for converting the timing of the periodic operation body. It has a cooking setting part 6 which sets an output at the time of cooking. Then, the timer shaft 2 and the conversion shaft 5 are fixed to the case body 10 in which the upper and lower split cases are combined, and the range cooking switch is provided on one side of the conversion shaft 5 side, and the grill cooking on the other side. The space is provided in the case body 10 so that the switch can be arrange | positioned in the plane. In addition, a folding fixing part for fixing the contact piece of each switch may be provided on the side wall of the case body 10.

Description

TIMER FOR MICROWAVE OVEN AND MICROWAVE OVEN WITH THE TIMER MOUNTED THEREON}

The present invention relates to a microwave oven timer having two axes of a timer shaft for setting a cooking time, a conversion shaft for setting an output during range cooking, and a microwave oven using the timer.

BACKGROUND ART A microwave oven timer having two axes of a timer shaft and a conversion shaft is well known in the art. For example, a timer having a periodic operation conversion function as an output adjustment of a microwave oven is started in Japanese Patent Application No. 63-73823 or Japanese Patent Application No. 63-72828. However, these timers are only configured to set the microwave (magnetron) output in addition to the setting of the cooking time.

Recently, however, there has been a new, highly functional motorized timer for microwave ovens in which grill cooking is performed in addition to conversion of microwave oven output (power) or grill cooking function and range cooking function can be used simultaneously. This new motorized timer for a microwave oven requires a grill cooking switch and a separate range cooking switch for operating the magnetron at the same time as the grill cooking in addition to the conventional timer switch and the periodic action switch.

This new motorized timer for a microwave oven makes a timer block with a timer switch and a periodic action switch in a resin case, and the timer block, a conversion shaft block, two micro switches, The intermediate gear that transfers the power from the shaft block to the periodic motion converter of the timer block is fixed with screws and caulking.

The two microswitches are each a grill cooking switch and a range cooking switch. The conversion shaft block is covered with a metal bracket for inserting the conversion shaft into the metal attachment plate.

As the conventional new microwave type timer for a microwave oven is configured to divide each block or the like as described above (hereinafter referred to as a split type), the whole becomes long horizontally, and warpage, flatness, and twisting become a problem. That is, by adopting a metal attachment plate, the planar view is maintained in response to warpage and torsion. In addition, the split type can be easily manufactured without changing the mold when the distance between the two axes and the attachment angle are to be changed according to the user's specifications.

In the conventional new split type motor type timer for a microwave oven, the verticality of the timer shaft is deteriorated by the difference in the screw tightening force of several screws when the timer block is fixed by a metal attachment plate. Even if a bearing rib (protruding part due to barring processing) is provided on the attachment plate to maintain the verticality, the baring dimension for the metal plate is limited, and it is difficult to prevent shaft shaking of the timer shaft.

In addition, the bending angle of the metal bracket becomes unstable, and the conversion shaft is eccentric when fixing the mounting plate and the block. In addition, since two microswitches are stacked in the axial direction, the axial distance of the operating portions of both microswitches becomes long, and as a result, there is a need to provide a cam section for axially spaced operation of the operating portions. For this reason, the rotation angle determination spring which positions the rotation angle of a conversion shaft in a predetermined state should be arrange | positioned in the center part of a conversion shaft, and it must become a shape which cannot shape | transform a conversion shaft in an axial direction, and should be many parts. For this reason, the conversion axis cannot maintain the vertical degree.

If the verticality of the timer shaft and the conversion shaft does not come out as described above, when the timer is attached to the microwave oven, the case of the microwave oven and the handle (operating means) attached to each shaft are brought into contact with each other. Stopping or malfunctioning of the timer or conversion axis occurs. In addition, the shaft shake of the conversion shaft causes a change in the amount of pressing on the operating portions of the two micro-switches, resulting in a malfunction of the micro-switch and a malfunction of cooking.

In addition, in the split type timer, position shifting is likely to occur because the assembly of the timer block and the conversion block is performed by the operator while the final process is directly viewed. In other words, a deviation is likely to occur between the position of the member for setting the conversion timing of the periodic motion converter period and the conversion axis display device. In addition, the conversion timing setting member is connected to the conversion shaft through two intermediate cars to synchronize the movement angle of the conversion shaft and the setting member, but the axis of the intermediate car is eccentrically due to caulking eccentricity or inclination, In this case, the display state by the conversion shaft and the actual setting state by the periodic motion converter mechanism are shifted.

In this way, when the display state of the conversion shaft and the actual setting state deviate, the microwave oven does not perform the operation expected by the customer, resulting in a defective microwave oven. In addition, if an eccentricity or a gap occurs between the gears in the middle car or the like, an unpleasant sound may be generated when the conversion shaft is operated, or cooking may fail due to an insufficient amount of the operation amount.

An object of the present invention is to provide a microwave oven-type timer and a microwave oven capable of forming and maintaining a perpendicularity between a timer shaft and a conversion shaft, which have been made to solve the above problems. Another object of the present invention is to provide a microwave oven timer and a microwave oven which can prevent a difference between the display state of the conversion shaft and the actual setting state. Another object of the present invention is to provide a microwave oven and a timer for a microwave oven that employs a large case and can cope with different attachment angles to other devices. Another object of the present invention is to provide a microwave oven timer and a microwave oven that employs a large case and can cope with a change in the distance between the axis of the timer shaft and the conversion shaft.

1 is a front view of a timer for a microwave oven according to an embodiment of the present invention.

FIG. 2 is a plan view seen from arrow II of FIG. 1;

3 is a bottom view as seen from arrow III of FIG. 1;

4 is a partial cross-sectional view showing a parallel attaching surface of an attaching ear of the timer for the microwave oven of FIG. 1;

5 is a partial cross-sectional view showing the inclined surface of the attachment ear of the timer for the microwave oven of FIG.

6 is a plan view showing the left half of the microwave oven timer of Figure 1 minus the upper case.

FIG. 7 is a plan view showing the right half of the microwave oven timer of FIG. 1 except the upper case; FIG.

FIG. 8 is a partial sectional view showing the vicinity of a timer axis of the timer for the microwave oven of FIG. 1; FIG.

9 is a partial cross-sectional view showing the periphery of the conversion shaft of the timer for the microwave oven of FIG.

10 is a plan view showing the configuration and switch rotation of the timer block drive mechanism of the timer for the microwave oven of FIG. 1;

FIG. 11 is an exploded perspective view showing the configuration of main parts of the periodic operation mechanism of the timer for the microwave oven of FIG. 1; FIG.

12 is a side view of the conversion shaft of the timer for the microwave oven of FIG. 1;

FIG. 13 is a bottom view seen from arrow III in FIG. 12; FIG.

14 is a diagram illustrating a circuit configuration of the microwave oven timer of FIG. 1.

FIG. 15 is a diagram illustrating a circuit configuration of a microwave oven in which the circuit of the timer for the microwave oven of FIG. 1 is assembled. FIG.

FIG. 16 is a diagram showing a display example displayed on the instruction operating portion of the microwave oven for the operation of the timer knob attached to the timer shaft of the microwave oven timer of FIG. 1;

FIG. 17 is a diagram showing a display example displayed on the instruction operating portion of the microwave oven for the operation of the conversion knob attached to the conversion shaft of the microwave oven timer of FIG. 1; FIG.

18 is a diagram showing a relationship between the on time of the range output setting switch of the timer for the microwave oven of FIG. 1 and the winding angle of the conversion shaft (conversion knob); FIG.

19 is a diagram showing a relationship between on and off of a grill cooking switch and a range cooking switch of the microwave oven timer of FIG. 1 and a winding angle of a conversion shaft (conversion knob); FIG.

20 is a plan view of a conversion shaft block used to change the position of the conversion shaft of the timer for the microwave oven of FIG. 1;

FIG. 21 is a side view seen from arrow XXI in FIG. 20; FIG.

FIG. 22 is a plan view showing a state in which the conversion shaft block of FIG. 20 is attached to the microwave oven range timer of FIG. 1; FIG.

FIG. 23 is a cross-sectional view taken along the line A-B-C-D-E-F-G of FIG. 22; FIG.

Next, a microwave timer according to an embodiment of the present invention will be described with reference to FIGS.

This microwave oven timer (hereinafter simply referred to as a range timer) 1 has a timer shaft 2 for setting a cooking time, a timer unit 4 operated by the motor 3, and a motor 3; It consists of the cooking setting part 6 which sets an output at the time of range cooking at least by operating the conversion shaft 5 which changes the timing of the main body which rotates by the following description (it mentions later). In addition, the timer unit 4 is provided with a bell 7 to notify the user when the cooking time is finished.

The range timer 1 determines the execution time of range cooking or grill cooking by rotating the timer shaft 2. Also, by rotating the conversion shaft 5, the output (range power) can be arbitrarily converted between 0% and 100% during range cooking, grill cooking only, or the grill cooking function and the range cooking function simultaneously (referred to as the next combination). Can be.

Range cooking uses a magnetron to apply the microwave to the plant. Grilling is used as a cooking method to bake or fry ingredients. Combi Chorizo operates the magnetron and the heater simultaneously to convert the power of the magnetron into three stages: 40%, 60% and 80%.

The main function of the range timer 1 is housed in the case body 10. The case body 10 is configured by combining two divided cases 11 and 12 made of resin. One split case 11 (referred to as the upper case 11 for the sake of convenience) is provided with four attachment ears 13 for assembling inside an instruction operation unit provided in the front part of the microwave oven serving as another apparatus.

The attachment ear 13 has a parallel attachment surface on which the side at which the timer shaft 2 and the conversion shaft 5 protrude from each other can be attached in parallel to the upper case 11 perpendicular to the two shafts 2 and 5. The inclination attachment part 17 which has the parallel attachment part 15 which has 14, and the inclination attachment surface 16 inclined slightly with respect to this parallel attachment surface 14 is provided. That is, the inclination attachment part 17 has an inclination angle α with respect to the surface perpendicular to the timer axis 2 or the conversion axis 5 (= plane parallel to the outer surface of the upper case 11) 18. In this embodiment, the inclination-attached surface 16 becomes 3.8 degrees but may be another angle.

The upper case 11 includes a recess 21 for accommodating the gear portion 73 of the timer shaft 2, a recess 22 for accommodating intermediate gears of the spur gear wheels described later, and the recess 21. Protrusions 23 and 24 protruding out of the case to form 22), and ribs 25 protruding slightly toward the lower case 12 for engagement with the lower case 12 and also serve as reinforcement. To be prepared. Since the ribs 25 are provided over the entire circumference of the outer circumference, the upper case 11 has a thin box shape with one surface open. The rib 25 also serves as a side wall of the upper case 11.

The protrusions 23 and 24 of the upper case 11 are provided with a bearing portion 26 for the timer shaft 2 and a bearing portion 27 for the conversion shaft 5, respectively. Each bearing portion 26 and 27 has a fixing portion made of a case thickness and has a configuration of bearing ribs 28 and 29 protruding outward of the case 10.

The other split case (hereinafter referred to as the bottom case) 12 is formed in a thin box shape with one side open and for fixing the top and bottom cases 11 and 12 to the side wall 31 in the longitudinal direction. Three fixing threaded bosses 32 into which screws are inserted and two folding fixing parts 33 to which the folding pieces of the rib switch described later are fixed are provided. These fixing threaded bosses 32 and the folding fixing parts 33 have a function as reinforcing ribs to reinforce the strength of the side walls 31, and are separated from the side walls 34 in the short direction of the lower case 12, They are also installed separately from each other, so that they are installed at approximately equal intervals.

In addition, two fixing threaded bosses 35 are provided on one side wall 34 in the shorter direction of the lower case 12, and two positions for positioning the contact piece of the leaf switch on the other side wall 34. Crystal ribs 36 are provided. In addition, a bearing portion 37 for the timer shaft 2 and a bearing portion 38 for the conversion shaft 5 are provided in the bottom surface portion of the lower case 12.

The bearing part 37 for the timer shaft 2 provided in the lower case 12 becomes concave, and the outer periphery becomes the bearing rib 39 which protruded inwardly from the bottom part. The bearing portion 38 is composed of a fixed portion 40 made of a case thickness and a bearing rib 41 protruding out of the case. In addition, the bearing portion 38 is provided with three reinforcing ribs 43 to cover the bearing rib 41 and the bottom surface 42 of the lower case 12.

Although the upper case 11 and the lower case 12 are provided with other means or zones that play various roles, they will be described together when explaining the main functions and the like stored in the case body 10.

Next, the drive mechanism of this range timer 1 is demonstrated.

The drive mechanism of the range timer 1 removes the motor 3, which becomes a small AC synchronous motor, and is stored in the case body 10. The mechanism in the case body 10 includes a timer mechanism portion for operating the timer switch 51, a cycle operation mechanism portion for operating the range output setting switch 52, a range cooking switch 53 and a grill cooking switch ( And a spur gear lubrication section connecting the mode converting mechanism portion and the periodic operation mechanism portion. Here, the timer block 55 is constituted by the timer mechanism part and the periodic operation mechanism part, and the mode conversion mechanism part constitutes the mode conversion block 56.

The timer mechanism portion has a deceleration lubrication heat composed of a low torque portion that rotates at high speed and a high torque portion that rotates at low speed, and a switch portion. The low torque portion has a rotor pinion (not shown) that rotates integrally with the rotor 61 of the motor 3, a first wheel 62 having a large race gear 62a engaged with the rotor pinion, and a first wheel ( The second car 63 having the large-diameter gear portion engaged with the small-diameter gear portion 62b of 62; and the third car 64 having the large-diameter gear portion 64a engaged with the small-diameter gear portion of the second race 63; It is composed. Here, the first car 62 and the third car 64 are supported by the first support shaft 65 and at the same time arranged up and down.

The high torque portion of the timer mechanism portion has a large-diameter gear portion 66a engaged with the small-diameter gear portion 64b of the third car 64, and the fourth car is supported on the second support shaft 67 that is the same as the second car 63. 66), the small-diameter gear 68 of the small diameter meshed with the large-diameter gear portion 66a, and the small-diameter gear portion of the fourth car 66 supported by the same third support shaft 69 as the fifth car 68; 6th wheel 70 having a large-diameter gear portion 70a meshing with 66b, and a large-size gear portion selectively engaged with any one of the small-size gear portion 70b of the fifth-order 68 and the sixth-order 70; 7th wheel 71 having 71a, 8th wheel 72 having a large-diameter gear portion 72a meshing with a small-diameter gear portion 71b of 7th wheel 71, and 8th wheel 72 small raceway It consists of the timer shaft 2 which has the gear part 73 which meshes with the fisherman 72b, and the timer cam 85 mentioned later.

Between the first wheel 62 and the bottom of the lower case 12, a rotation direction regulating member 74 for regulating in one direction and the rotation direction of the rotor 61 is disposed. Further, a traveling angle conversion lever 76 for moving the seventh drive 71 to the bottom surface side of the lower case 12 of the fourth support shaft 75 supporting the seventh drive 71 is disposed. The traveling angle conversion lever 76 is engaged with the large-diameter gear portion 78a of the lever operating member 78 which is rotatably supported by the fifth support shaft 77 to be rotated.

On the other hand, the lever operation member 78 executes the rotation operation by engaging the small tooth gear portion 78b with the conversion tooth portion 79 provided on the timer shaft 2. The lever operating member 78, the traveling angle conversion lever 76, and the seventh wheel 71 move the seventh wheel 71 upward in FIG. 5 when the timer shaft 2 is rotated 200 degrees or more. By this movement, the seventh wheel 71 is engaged with the sixth wheel 70 so that the return rotation speed of the timer shaft 2 is slowed down.

The eighth wheel 72 is composed of three parts: a large-diameter gear portion 72a, a shaft portion 72c in which the small-diameter gear portion 72b is integrated, and a leaf spring 72d for frictionally coupling the two. With this configuration, when the eighth wheel 72 rotates the timer shaft 2 in the setting direction, the large race gear portion 72a idles with respect to the shaft portion 72c. Accordingly, excessive force is applied to the rotor 61 side, and the timer shaft 2 can be rotated.

The timer shaft 2 includes an operation shaft portion 81 into which a knob (not shown) for a timer is inserted, a gear portion 73, a conversion tooth portion 79, and a large diameter shaft portion supported by a bearing portion 26 ( 82, the small-diameter shaft portion 83 supported by the bearing portion 37, and the cam coupling portion 84 are integrally formed heat-resistant resin integrally molded articles.

The cam coupling portion 84 of the timer shaft 2 is coupled to the timer cam 85 and rotates the timer cam 85 together with the rotation of the timer shaft 2. Accordingly, the timer cam 85 operates the switch unit. That is, the operation arm 86 contacts the main surface of the timer cam 85, and the contact part 86a falls to the recessed part 85a of the timer cam 85, thereby turning off the timer switch 51. That is, each contact 89 and 90 of the two contact pieces 87 and 88 constituting the timer switch 51 serving as a leaf switch is separated. In addition, the bell striking means (not shown) which rings the bell 7 by the rotation of the operation arm 86 is rotated at the same time.

In addition, dust or foreign substances generated at the contact portion or other movable parts are formed on the outer circumference of the outer periphery of the first and second car 62 and the third and the third car 64, that is, the parts facing the second or third car 63 or the fourth car 65 side. The prevention wall 91 which prevents these low-torque parts and the rotor 61 from entering the side is built in from the bottom of the lower case 12. The height of the barrier wall 91 is preferably about the same height as the position of the third vehicle 64. In this embodiment, it is slightly lower than the third car 64.

Next, the periodic operation mechanism part of the drive mechanism of the range timer 1 is demonstrated.

In addition to the rotor pinion, the first wheel 62, the second car 63, and the third car 64 described above, the periodic mechanism may be engaged with the small-diameter gear 64b of the third car 64 in addition to the rotor pinion 101a. And a tenth wheel 103 engaged with the sixth support shaft 102, the tenth wheel 103 meshed with the small-diameter gear portion 101b of the ninth wheel 101, and the tenth wheel 103. The eleventh wheel 104 having the shaft portion 104a and the gear portion 104b, and the swinging arm 106 oscillating about the seventh support shaft 105 by the axial movement and rotation of the tenth wheel 103. And the contact portion 106a of the swinging arm 106 is turned off by burning on the main surface 108 of the two-way operation cam portion 107 provided integrally with the tenth order 103, and the tenth order 103 is shown in FIG. It is composed of a range output setting switch 52, which is pushed down from the side and turned on as the swinging arm 106 swings on the side surface 109 of the two-way operation cam part 107 while the contact portion 106a is burned up. In addition, the tenth operation 103 and the eleventh operation 104 constitute a periodic operation body.

The two-way operation cam part 107 provided in the tenth step 103 includes two concave parts 110, two slopes 111 that gently extend from the concave part 110 to the side surface 109, and the eleventh step. Two bilateral protrusions 112 serving to push down by 104 are provided. Further, a coil spring 113 is provided on the lower case 12 side of the tenth car 103, and the tenth car 103 is urged to the upper case 11 by a spring.

In the eleventh train 104, two projections 114 of a triangular shape for pushing down the tenth car 103 and the range output setting switch 52 are always coupled to the protrusions 112 of the tenth car 103. Since it is turned on, one triangular protrusion 116 is provided to engage with the pushing member 115 for pushing down the tenth order 103.

The pushing member 115 is supported by the shaft 117 and is placed on the side surface 109 of the tenth order 103. The pushing member 115 is provided with a protrusion 118 in which the protrusion 116 of the eleventh car 104 burns up, and a rotation stopping part 119 for preventing left and right pivoting. The protruding portion 118 is provided with slopes 118a and 118a where the protrusion 116 is burned up and down and the planar top portion 118b on which the protrusion 116 is stably stacked. The rotation stop part 119 enters into the recessed part of the columnar part 120 of the cross-sectional recess provided in the lower case 12. As shown in FIG.

The swinging arm 106 includes an operation unit 121 for operating the range output setting switch 52 and a dropping stop unit 22 for preventing the swinging arm 106 from escaping from the seventh support shaft 105. Is prepared. The operation part 121 contacts with the contact piece 123 which comprises the range output setting switch 52 which becomes a leaf switch, and removes or contacts the contact piece 124 from the other contact piece 124. As shown in FIG. That is, the contact points 125 and 126 are provided in the front-end | tip of each contact piece 123 and 124, and the range output setting switch 52 is turned on-off by folding by the rotation of the swinging arm 106. FIG.

The dropout blocking part 122 is disposed below the protruding portion 127a of the fall prevention stopping protrusion 127 provided in the lower case 12. Moreover, the hole 28 which communicates with an outer side is provided in the lower case 12 side which this protrusion 127a opposes.

On the side of the contact piece 123, a contact piece 131 for forming the terminal T1 for the motor 3 is disposed, and is soldered to the pin-shaped terminal of the motor 3 by the solder connection portion 132. In addition, the contact piece 124 is soldered to the other pin-shaped terminal of the motor 3 and the solder joint 133 to form the other terminal T3 for the motor 3.

The length of the side wall 31 in the longitudinal direction of the lower case 12 that the solder joints 132 and 133 face each other is lower than that of the other side wall. That is, a large incision is made to have a descending inclined portion 134 going down as shown in FIG. On the other hand, the upper case 11 is provided with a mountain-shaped protrusion 137 protruding toward the lower case 12 to block the cut off portion.

This cutout provided in the lower case 12 can widen the operating range of the soldering iron when soldering the solder joints 132 and 133, thereby improving work efficiency. In addition, the risk of the soldering iron coming into contact with the side wall 31 of the lower case 12 is reduced, and the lower case 12 is less likely to be defective.

In addition, the terminal piece T5 is integrally formed in the contact piece 87, the terminal T4 is integrally formed in the contact piece 88, and the terminal T2 is integrally formed in the contact piece 123. Each of the terminals T1 to T5 protrudes outward from the inside of the lower case 12 and is arranged in parallel at regular intervals as shown in FIG. 3. The parallel arrangement also meets the specifications for commercially available 5-pole connectors.

Next, the mode conversion mechanism section (mode conversion block) will be described.

The mode conversion mechanism unit has a rotation angle determining spring for positioning the rotation shaft of the conversion shaft 5, the range cooking switch 53, the grill cooking switch 54, and the conversion shaft 5 in a predetermined state ( 141). In addition, the rotation angle determining spring 141 is inserted into the groove portion provided in the lower case 12, and then pushed when combining both cases 11 and 12 by the projections provided in the upper case 11. Enter

The conversion shaft 5 has a shape that can be molded in the axial direction and a heat resistant resin integrally molded article. The conversion shaft 5 includes an operation shaft portion 142 inserted and coupled with a handle (not shown) serving as an operation means, a fixing portion 143 fixed by the bearing portion 27 of the upper case 11, and an intermediate part to be described later. Grill to turn on / off control of the gear portion 144 meshing with the gear 212, the spring engagement cam portion 145 which is the maximum diameter of the spring 141 for determining the rotation angle, and the grill cooking switch 54. A pin cam hole 148 for assembling jig pins for determining and assembling the position cam unit 147, the range cam unit 147 for turning on and off the range cooking switch 53, and the intermediate gear 212; The support part 149 is integrally supported by the bearing part 38 of the lower case 12.

The spring coupling cam portion 145 has a small uneven portion 151 in which small unevenness is formed, and six peaks 152 to 157 having arced tops. The notch (valley part) 161 between the peak portion 152 and the peak portion 153 is for fixing the position of the conversion shaft 5 in a predetermined state (= range cooking at 100% of range power). The position of this notch 161 forms the position where the triangular protrusion part 141a of the rotation angle determination spring 141 penetrates when the conversion shaft 5 is rotated by angle (beta) 1 (170 degree in this embodiment). .

The notch (valley) 162 between the peak 153 and the peak 154 is for fixing the setting of the conversion shaft 5 to grill cooking. The position of this notch 162 forms the position which the triangular protrusion part 141a of the rotation angle determination spring 141 penetrates when the conversion shaft 5 rotates the angle (beta) 2 (200 degree in this embodiment). .

The notch (valley part) 163 of the hill 154 and the hill 155 allows the setting of the conversion shaft 5 to be performed at the same time as the range cooking function and the grill cooking function, and the power of the magnetron (range power) is approximately 40%. It is intended to fix the state set to. The position of this notch 163 forms the position which the triangular protrusion part 141a of the rotation angle determination spring 141 penetrates when the conversion shaft 5 rotates the angle (beta) 3 (230 degree in this embodiment). .

The notches (valleys) 164 of the peaks 155 and 156 allow the setting of the conversion shaft 5 to be performed at the same time as the range cooking function and the grill cooking function, and the power of the magnetron (range power) is approximately 60%. This is to maintain the state set to. The position of this notch 164 forms the position where the triangular protrusion part 141a of the rotation angle determining spring 141 penetrates when the conversion shaft 5 is rotated by angle (beta) 4 (270 degree in this embodiment). .

The notches (valleys) 165 of the peaks 156 and 157 allow the setting of the conversion shaft 5 to be performed at the same time as the range cooking function and the grill cooking function, and the power of the magnetron (range power) is approximately 80%. This is to maintain the state set to. The position of this notch 165 forms the position which the triangular protrusion part 141a of the rotation angle determination spring 141 penetrates when the conversion shaft 5 rotates the angle (beta) 5 (310 degree in this embodiment). .

The range cooking switch 53 is a leaf switch and includes a contact piece 171 and a contact piece 172. The contact piece 171 is provided on the lower case 12 side of the contact piece 171 and provided on the triangular protrusion 173 contacting the cam portion 147 for the range and the upper case 11 side of the contact piece 171 for grilling. It has the triangular protrusion part 174 which protrudes in the direction away from the cam part 146, and the contact point 175. As shown in FIG. The contact piece 172 is provided with a contact 176 and a terminal T10 protruding outward of the lower case 12 is integrally formed.

In addition, the end portion of the contact piece 171 is fixed to the contact fixing part 33 of the lower case 12 and at the same time bent in the horizontal direction 90 degrees so as to follow the flat part of the contact fixing part 33, the flat metal part 181 of the plane Is formed. The terminal body 182 fixed to the folding fixing part 33 is provided to contact the contact piece 171, one end of which protrudes outward of the lower case 12 as a terminal T9, and the other end is a metal plane. A metal plane portion 183 is disposed symmetrically with the portion 181. Both metal flat portions 181 and 183 constitute a solder receiving portion. Since the solder receiving part is entirely flat, soldering is performed efficiently.

The grill cooking switch 54 is also a leaf switch, and is composed of a contact piece 191 and a contact piece 192. The contact piece 191 is provided on the upper case 11 side of the contact piece 191 is provided on the triangular projection 193 in contact with the cam portion 146 for the grill, and the lower case 12 side of the contact piece 191 for the range It has the triangular protrusion part 194 which protrudes in the direction away from the cam part 147, and the contact point 195. As shown in FIG. The contact piece 192 is provided with a contact point 196 and at the same time, a terminal T7 protruding to the outside of the lower case 12 is integrally formed.

In addition, the end portion of the contact piece 191 is fixed to the contact fixing part 33 of the lower case 12 and at the same time bent in the horizontal direction 90 degrees so as to follow the planar part of the contact fixing part 33 is a flat metal part 201 Is formed. A terminal body 202 fixed to the folding fixing part 33 is provided to contact the folding piece 191, and one end thereof protrudes outward of the lower case 12 as a terminal T6, and the other end thereof is a metal plane. The metal flat portion 203 is disposed symmetrically with the portion 201. In both metal flat parts 201 and 203, a soldering part is comprised. Since the solder receiving part is entirely flat, soldering is performed efficiently.

Arrangement of the terminal T9 and the terminal T10 and arrangement | positioning of the terminal T6 and the terminal T7 are adapted to the specification of the commercially available 2-pole connector. The switch 54 for grill cooking may be provided with the contact piece 204 which the contact piece 191 contacts when this switch 54 is turned off, and the switch 205 may be formed. This switch 205 is a switch which is turned on when grill cooking is off (= at random output cooking of a range).

Next, the spur gear lubricating portion of the range timer 1 will be described.

The spur gear lubricating portion meshes with the gear portion 144 of the conversion shaft 5, and has a large diameter intermediate gear 212 supported by the eighth support shaft 211 and the ninth support shaft in engagement with the intermediate gear 212. The middle gear 214 of the small diameter supported by 213 and the gear part 104b of the 11th wheel 104 which mesh with this intermediate gear 214 are comprised.

The large diameter intermediate gear 212 enters the hole 215 of the upper case 11, and the shaft portion 216, the gear portion 217, and the large diameter portion and the gear of the shaft portion 216 are formed to maintain the vertical degree. A retaining coupling portion having a plurality of connecting arm portions 218 connecting the portions 217, a pin through hole 219 through which the assembly jig pins pass, and a support hole portion 220 through which the eighth support shaft 211 is fitted. 221 is provided.

Both the eighth support shaft 211 and the fixed coupling portion 221 are made of resin and have elasticity slightly inclined when a lateral force is applied, so that the intermediate gear 212 is moved to the gear portion 144 or the intermediate gear 214. When assembled, it is easier to assemble. On the other hand, the inlet outer periphery of the hole portion 215 of the upper case 11 is provided with a tapered portion 222 that becomes an inclined surface to easily insert the shaft portion 216.

The small diameter intermediate gear 214 is provided with a gear portion 223 and a shaft coupling portion 224 supported by the ninth support shaft 213. The ninth support shaft 213 is made of resin and has elasticity which is slightly inclined when a force in the lateral direction is applied, and the intermediate gear 214 of this small diameter is engaged with the gear portion 104b or the intermediate gear 212. It's easy. On the other hand, the inner periphery of the hole 225 of the upper case 11 is provided with a taper portion 226 that becomes an inclined surface so that the shaft portion of the tip of the ninth support shaft 213 easily enters.

In addition, when the conversion shaft 5, the intermediate gear 212, and the pin-through holes 148 and 219 overlap each other on the bottom of the lower case 12, the pin-through holes (= vertically lower positions) face each other. 231) is provided. Positioning of the conversion shaft 5 and the intermediate gear 212 is performed by inserting the assembling jig pins through the pin through holes 148, 219 and 231. Each of the pin-through holes 148, 219, and 231 are round holes having the same diameter, but may have shapes other than the round holes.

In addition, the central hole 232 opened in the axial direction of the eleventh car 104 has a D-shaped cross section, and the D-shaped cross section is assembled when the conversion shaft 5 and the intermediate gear 212 are aligned by the assembly jig pins. Through the center hole 232, the jig pin performs three-way alignment of the conversion shaft 5, the intermediate gear 212, and the eleventh order 104.

In addition, a part of the gear shaft 144 of the conversion shaft 5 is a flat portion 233 having a small thickness without teeth, while a part of the middle gear 212 with a large diameter has a thin thickness without teeth. It is a flat part 234. Both planar portions 233 and 234 are provided at positions where both of them rotate and overlap each other in the vertical direction. When they overlap with each other, the conversion shaft 5 becomes the initial position at the rotation angle of 0 degrees. Due to the overlap of the planar portions 233 and 234, the intermediate gear 212 is rotated by some factor to prevent the displacement.

Moreover, the conversion cam part is comprised by the grill cam part 146 and the range cam part 147.

In addition, the conversion cam section has a switch operating range (0 to 310 degrees) for operating both switches 53 and 54, and an operating range for assembling (not shown) (Fig. 13). In the range of 50 degrees). For this reason, if the conversion shaft 5 is inserted between the two switches 53 and 54 by effectively using the use range during assembly, the conversion shaft 5 can be simply assembled without contacting the two switches 53 and 54. Can be. In addition, if the switch shaft 5 is squeezed so that both switches 53 and 54 are turned on at the same time in the switch operating range, the switch shaft 5 can be simply squeezed. I can put it.

In addition, spaces SP1 and SP2 are generated between the side walls 31 and 31 of the portion where the spur gear wheels are arranged. For this reason, you may arrange | position a wheel heat, a cam, an operation arm, a switch, etc. in this space SP1 and SP2 for performing different control with respect to a microwave oven. In addition, the spur gear lubrication portion is positioned with shaft portions such as the intermediate gears 212 and 213 and the support shaft with the upper and lower cases 11 and 12. At this time, each gear of the spur gear lubrication unit is connected without a clearance angle.

The circuit configuration of the range timer 1 having the above configuration is as shown in FIG. That is, both ends of the motor 3 become terminals T1 and T3, and a range output setting switch 52 (SW2 in Fig. 14) is provided between the terminal T2 and the motor 3. In addition, a timer switch 51 (SW1 in FIG. 14) is disposed between the terminal T4 and the terminal T5, and a grill cooking switch 54 (in FIG. 14) between the terminal T6 and the terminal T7. SW3 is disposed, and a range cooking switch 53 (SW4 in Fig. 14) is disposed between the terminal T9 and the terminal T10. A part of this circuit configuration is arranged in the vicinity of each terminal T1 to T10 portion of the bottom face of the lower case 12 so as to eliminate the connection miss (see Fig. 3).

The circuit configuration of the microwave oven in which the range timer 1 is incorporated is as shown in FIG. The AC power supply 241 is added to the main circuit consisting of the terminal T3, the motor 3, the terminal T1, the terminal T5, the timer switch 51 (SW1), and the terminal T4. The AC power supply 241 also includes a terminal T3, a switch for setting the range output 52 (SW2), a terminal T2, a transformer 242, a magnetron 243, a terminal T10, and a range cooking switch 53. ) Is added to the range circuit consisting of SW4, the terminal T9, and the terminal T5. The AC power source 241 is also added to the grill circuit of the grill heater 244, the terminal T7, the grill cooking switch 54 (SW3), and the terminal T6.

The range timer 1 is incorporated inside the instruction operation unit provided in the front part of the microwave oven, but the display shown in FIG. . The part that rotates the timer knob 200 degrees is 10 minutes at equal intervals every minute. After that, it is displayed for 10 minutes at intervals of 60 minutes (300 degrees from the angle from 0 minutes). That is, 10 minutes (200 degrees) is the conversion point. The time setting by the timer knob is performed by rotating the timer shaft 2 in the direction of arrow A in FIG.

When the seventh car 71 is engaged with the fifth car 68, the deceleration rate is not large, and the display from 0 to 10 minutes is taken. When the seventh wheel 71 is engaged with the small-diameter gear portion 70B of the sixth wheel 70, the deceleration rate is increased to correspond to the display state portion from 10 minutes to 60 minutes.

The indication operation unit of the microwave oven also displays a handle (not shown) for the conversion shaft 5. An example of this display is shown in FIG. Fig. 18 showing the relationship between the on-off time by the range output setting switch 52 (SW2) and the winding angle of the knob, the grill cooking switch 54 (SW3) and the range cooking switch 53 The relationship between the conversion shaft 5 and the periodic operation mechanism and the relationship between the conversion shaft 5 and the switches 53 and 54 using Fig. 19 and the like illustrating the relationship between the on / off of SW4 and the winding angle of the knob. Will be described next.

The range output free setting range is 0 to 160 degrees of the winding of the conversion shaft 5, and the range power is 0 to 100% (see Fig. 18). The vertical axis of FIG. 18 shows time when the range output setting switch 52 (SW2) turns on. When the tenth order 103 is rotated halfway in 30 seconds, and the range output setting switch 52 (SW2) is kept on in the meantime, the range power becomes 100%. On the other hand, in this range, the grill cooking switch 54 (SW3) is turned off and the range cooking switch 53 (SW4) is turned on.

When the conversion knob is slightly rotated in the direction of arrow C of FIG. 7, the eleventh car 104 is slightly rotated in the direction of arrow C1 of FIG. 6. At this time, of the two projections 114 and 11 of the eleventh car 104, the projections 114 which are separated from the swinging arm 106 in the direction of the arrow E in FIG. 11 are 90 degrees or more away from the contact portion 106a. On the other hand, the tenth wheel 103 is constantly rotating in the direction of the arrow E in FIG. For this reason, after the contact part 106a enters into the recessed part 110 of the two-way operation cam part 107, and also goes up to the main surface 108, off state continues for a long time and range power becomes small.

The contact portion 106a, which is burned up to the main surface 108 of the two-way operation cam part 107, is rotated again by the tenth order 103, and the protrusion 112 collides with the protrusion 114 of the eleventh order 104, When the tenth car 103 is pushed down to the lower case 12 side, it drops to the side surface 109 of the two-way operation cam part 107. As a result, the range output setting switch 52 (SW2) turns on. However, immediately afterwards, since the slope 111 comes to the position of the contact portion 106a, the contact portion 106a descends the slope portion 111. In other words, the tenth car 103 rises toward the upper case 11 by the negative force of the coil spring 113.

Thus, the contact part 106a which entered into the recessed part 110 rises from the recessed part 110 to the main surface 108 by this rotation of the tenth order 103, and switches the range output setting switch 52 (SW2) again. Turn it off. This operation is repeated every half rotation of the tenth order 103 to turn the contact switch 52 (SW2) on and off every half rotation.

When the conversion knob is rotated again in the C direction, the eleventh wheel 104 rotates again in the direction of the arrow C1, and the arrow E direction side protrusion 114 approaches the contact portion 106a. For this reason, the contact part 106a which burned up to the main surface 108 falls to the side surface 109 in a short period, and the time in the side surface 109 becomes long. That is, the time for turning on the range output setting switch 52 (SW2) becomes long, and the range power increases.

When the conversion knob is rotated again in the C direction and rotated 170 degrees (the display position of the range 100% in Fig. 17), the triangular projection 141a of the rotation angle determining spring 141 is a spring coupling cam portion ( Enter notch 161 of 145. On the other hand, the eleventh car 104, which has been rotated, rides up to the protrusion 118 of the member 115 to which the triangular protrusion 116 is pushed down, and pushes the pushing member 115 toward the lower case 12 side. . For this reason, the tenth order 103 is pushed down to the lower case 12 in response to the negative force of the coil spring 113. As a result, the contact portion 106a is always placed on the side surface 109 during the rotation of the tenth order 103, and the range output setting switch 52 (SW2) is always on. Therefore, range power is maintained at 100%.

When the conversion knob is rotated again in the C direction, the triangular protrusion 141a of the rotation angle determining spring 141 falls over the peak 153 of the spring coupling cam 145 and falls to the notch 162 in an instant. This position is a 200 degree position as a winding angle, the range cooking switch 53 (SW4) turns off, and the grill cooking switch 54 (SW3) turns on as shown in FIG. This position corresponds to the position of "grill" in FIG.

In addition, the range output setting switch 52 (SW2) is always on, but since the range cooking switch 53 (SW4) is turned off, only the grill cooking is possible without supplying power to the magnetron 243. . Both switches 53 and 54 are switched from on to off or off to on. However, since the peaks 153 have an arc-shaped top, both switches 53 and 54 enter the notch 162 in an instant. ) Is instantaneously converted. For this reason, the lifetime of both switches 53 and 54 becomes long.

When the conversion knob is rotated again in the C direction, the triangular protrusion 141a of the rotation angle determining spring 141 passes over the peak portion 154 of the spring engagement cam portion 145, and instantly falls to the notch 163. This position is the winding angle and the range cooking switch 53 (SW4) turns on at the same time as 230, and the grill cooking switch 54 (SW3) continues to be turned on as shown in FIG. Combination cooking is possible by this.

When moving to the notch 163, the triangular projection 116 of the eleventh car 104 exceeds the projection 118 of the member 115 to be pushed down, and the on / off repeat of the range output setting switch 52 (SW2) is performed. The condition reoccurs. And the position of the winding angle of 230 degrees of a conversion knob is set to about 40% of range power in the position where the range output setting switch 52 (SW2) turns on for 9.8 second like FIG. 18, and turns off for 20.2 second. This position becomes the position of "range 40% grill" in FIG.

When the conversion knob is rotated again in the C direction, the triangular protrusion 141a of the spring 141 for determining the rotation angle passes over the peak 155 of the spring engagement cam 145 and falls momentarily to the notch 164. This position is the winding angle and the range cooking switch 53 (SW4) continues to be turned on as shown in FIG. 19 at the position of 270 degrees, and the grill cooking switch 54 (SW3) also continues to be turned on. The position of the winding angle of 270 degrees of the conversion knob is about 60% when the range output setting switch 52 (SW2) turns on 16.5 seconds and turns off 13.5 seconds as shown in FIG. This position becomes the position of "range 60% grill" in FIG.

When the conversion knob is rotated in the C direction again, the triangular protrusion 141a of the spring 141 for determining the rotation angle passes over the peak 156 of the spring coupling cam 145, and instantly falls to the notch 165. This position is the winding angle, and the range cooking switch 53 (SW4) continues to be turned on as shown in Fig. 19 at the position of 310 degrees, and the grill cooking switch 54 (SW3) also continues to be turned on. The position of the winding angle 310 degrees of the conversion knob is about 80% when the range output setting switch 52 (SW2) turns on 23.2 seconds and turns off 6.8 seconds as shown in FIG. This position becomes the position of "80% of range grill" in FIG.

Next, an operation overview of the microwave oven will be described.

First, set the cooking mode by operating the knob. At this time, the conversion shaft 5 is rotated in the arrow C direction in FIG. However, setting is possible even if the arrow is rotated in the opposite direction to the C direction. Next, operate the timer knob to set the cooking time. At this time, the timer shaft 2 is rotated in the direction of arrow A in FIG. By the setting of the timer knob, the timer switch 51 (SW1) turns on, the motor 3 starts to rotate in one direction, and the timer shaft 2 rotates in the direction of arrow B in FIG. do.

The tenth car 103 starts to rotate continuously by the rotation of the motor 3. However, since the eleventh train 104 is set to a predetermined position by the rotation of the conversion knob, the swinging arm 106 performs an operation conforming to the first determined cooking mode. After that, when the timer shaft 2 returns to the original initial position, the timer switch 51 (SW1) is turned off and the motor 3 stops. When the timer switch 51 (SW1) is turned off, the power supply to the magnetron 243 and the heater 244 is turned off, and all cooking ends.

Next, an independent conversion shaft fixed block (hereinafter referred to as a conversion shaft block) for changing the position of the conversion shaft 5 in accordance with a customer's request or the specification of the microwave oven will be described. The basic style of the range timer 1 has the appearance shown in Figs. 1 to 3, but the distance between the conversion shaft 5 and the timer shaft 2 or the position of the conversion shaft 5 is changed at the request of the customer. It may be necessary to change. For this reason, in this range timer 1, two positioning recesses 302 for attaching the conversion shaft block 301 described later to the upper case 11 and fixing for fixing the conversion shaft block 301 are fixed. Four fixing recesses 303 for screws are provided.

The transform shaft block 301 includes a first intermediate gear 305 and a first intermediate gear that rotate integrally with the intermediate conversion shaft 304 placed at the position of the transform shaft 5 described above with reference to FIGS. 20 to 23. A new conversion shaft 308 having a second intermediate gear 306 meshing with 305, a gear portion 307 meshing with the second intermediate gear 306, and these members are placed on the upper case. 11) it is composed of a box-shaped case 309, one surface is closed to fix in between.

The box-shaped case 309 has two positioning shaft portions 311 which enter the positioning recesses 302 of the upper case 11, and a fixing screw 312 is used to fix the recesses of the upper case 11 ( Four through-holes 313 passing through 303, through-holes and bearings for penetrating and fixing the respective shaft portions of the first intermediate gear 305, the second intermediate gear 306, and the new conversion shaft 308 are formed. .

Several conversion shaft blocks 301 are prepared in accordance with the requirements of the microwave oven manufacturer. As a result, the basic shape of the range timer 1 can be the same, and a timer can be obtained which can easily change the position of the conversion shaft 5 in accordance with specifications.

Each embodiment described above is an embodiment suitable for the present invention, but is not limited thereto, and various modifications can be made without departing from the gist of the present invention. For example, either one of the range cooking switch 53 and the grill cooking switch 54 may be removed or both may not be disposed. In this case, however, it is preferable to secure the space of the switches 53 and 54. That is, it is preferable to make each shape of the upper case 11 and the lower case 12 as it is, and to manufacture each kind of range timer according to a user's request. In addition, when the space for both switches 53 and 54 becomes a problem, you may make it remove suitably.

The terminals T1 to T5 generated in the timer block are five poles, but depending on the circuit configuration, other poles such as four poles may be used. In addition, although the terminal structure of the grill cooking part is made into the 2-pole structure of the terminals T6 and T7, you may make it the 3-pole structure as mentioned above. In addition, when providing another switch in space SP1 and SP2, you may make it protrude to the outer side of the lower case 12 also in that part.

In addition, the side walls of the upper and lower cases 11 and 12 may be divided so that their heights are the same. In addition, although one motor 3 is used as a drive source in the above-mentioned embodiment, another motor drive source may be provided also for a periodic operation mechanism part. In addition, although the motor type timer is disclosed in the embodiment of the present invention, each invention can be applied to the self-winding timer.

The present invention can obtain a microwave oven timer and a microwave oven capable of forming and maintaining the verticality of the timer axis and the conversion shaft. Another invention can obtain a microwave oven timer and a microwave oven which can prevent a difference between the display state of the conversion shaft and the actual setting state. In addition, another invention can obtain a microwave oven and a microwave oven that can cope with a case in which the attachment angle to other equipment is different while employing a large case. Still another invention provides a microwave oven timer and a microwave oven that can cope with a change in the interaxial distance between the timer shaft and the conversion shaft while employing a large case.

Claims (22)

In a microwave oven timer having a timer section having a timer shaft for setting a cooking time and a cooking setting section for setting at least a range cooking time by operating a conversion shaft for converting timing of a periodic operation body performing a periodic operation, The timer shaft and the conversion shaft are fixed by a case body combining two upper and lower divided cases, A space is provided in the case body in which a range cooking switch can be arranged on one side of the side of the conversion shaft and a grill cooking switch can be arranged on the other side. A timer for a microwave oven, wherein a piece fixing part for fixing the switch pieces is provided on the side wall of the case body. delete In a microwave oven timer having a timer unit having a timer axis for setting a cooking time and a cooking setting unit for setting at least a range cooking output by operating a conversion shaft for converting a timing of a periodic operating body, The timer shaft and the conversion shaft are fixed by a case body combining two upper and lower divided cases, In this case body, a timer switch, a range output setting switch and a range output setting switch arranged next to the timer cam rotated together with the deceleration lubrication heat and the timer shaft which are arranged in a satellite shape around the timer shaft and the timer shaft. A timer block comprising a cycle operation mechanism unit for performing a cycle operation for switching on and off in a short cycle, and a mode conversion block comprising the conversion shaft and a range cooking switch and a grill cooking switch properly disposed on both sides of the conversion shaft. And a timer for a microwave oven, wherein both blocks are connected without spur gear angles. The method of claim 3, wherein A taper portion for imparting elasticity to be able to tilt slightly in a vertical direction to the shaft portion supporting the spur gear lubrication and guiding the shaft portion to a position vertical to a hole in the split case side receiving the tip of the shaft portion. A timer for a microwave oven, which is provided. The method according to any one of claims 1, 3 and 4, A range cooking switch and a grill cooking switch are respectively provided on both sides of the conversion cam part provided to be integrally rotatable on the conversion shaft, and the area where only the range cooking switch is turned on the conversion cam part, and the grill cooking switch A timer for a microwave oven, characterized in that it is provided in at least three areas of the area where the bay is turned on and the area where both switches are turned on at the same time. The method according to claim 1 or 3, A timer for a microwave oven, wherein a drive source for causing the periodic operation is a motor for driving the timer shaft, and both switches are leaf switches. The method according to claim 1 or 3, All the terminal connection portions of the switches are projected on one side of the split case, and each terminal of the timer switch and the range output setting switch, which are provided on the side of the timer shaft, is arranged in one horizontal column, It is configured to be fitted to the commercial connector, and each terminal of the range cooking switch and the grill cooking switch independently of each other, the timer for a microwave oven, characterized in that a commercially available two-pole or three-pole connector . The method according to claim 1 or 3, The timer shaft and the conversion shaft are fixed by a case body in which two upper and lower divided cases are combined so that both axes are parallel, and the attachment ears for attaching to other equipment protrude in a direction substantially perpendicular to the both axes and on the side of the case body. A parallel attachment surface which is perpendicular to both axes on the side surface of the attachment ear portion in which both axes protrude out of the case body, and is parallel to the attachment side surface of the case body, and slightly inclined with respect to this parallel attachment surface. A timer for a microwave oven, wherein two surfaces of the inclined surface are provided. The method according to claim 1 or 3, An independent conversion shaft fixing block capable of providing an independent new conversion shaft for rotating the conversion shaft at a position different from the position of the conversion shaft is provided so as to surround the conversion shaft on the protruding side of the conversion shaft of the case. A microwave oven timer, characterized in that. The method according to claim 1 or 3, A timer for a microwave oven, wherein a prevention wall is provided around a low torque gear, such as a first gear meshing with a rotor of a motor which rotates integrally with a rotor of a motor to be driven. The method according to claim 1 or 3, Bearing parts of the timer shaft and bearing parts for the conversion shaft are provided with bearing ribs extending outwardly of the case body, and at least bearing parts on the side opposite to the attachment side of the conversion knob for manually operating the conversion shaft. A timer for a microwave oven, comprising a reinforcing rib connected to the bearing rib and reinforcing strength. The method according to claim 1 or 3, In order to divide the necessary height for accommodating each of the main mechanisms of the timer unit and the cooking setting unit, both of the split cases are provided on the side wall in the longitudinal direction of one split case on the side of which the side wall is increased while providing the concave portion into which the main part enters. A fastening boss for fastening and a fastening fastening for fastening the fastening part that is part of the switch are provided to be separated from the side wall in the short direction and to be separated from each other, and to prevent them from falling down. A timer for a microwave oven, characterized in that it functions as a reinforcing rib. The method of claim 12, A timer for a microwave oven, wherein a side wall is provided around the front of the other partition case facing the one partition case, and both partition cases are formed in a thin box shape with one surface open. The method according to claim 1 or 3, The intermediate vehicle engaged with the gear part of the conversion shaft and the member to rotate integrally with the intermediate shaft and the portion overlapping in the axial direction, and the intermediate vehicle which is the bottom of one case to be stacked when assembling the intermediate vehicle or the conversion shaft. And a pin-through hole through which assembly jig pins pass at the same position in each vertical direction of the portion overlapping in the axial direction again on both portions of the portion. The method according to claim 1 or 3, The conversion shaft is integrally molded with a heat-resistant handmade that can be molded in an axial direction, and simultaneously forms a conversion cam unit for operating the stove cooking switch and the grill cooking switch. A microwave oven timer comprising: a switch operating area for operating a switch for grill cooking, and an assembly use area for putting both switches in a non-contact state when assembling the conversion shaft. The method according to claim 1 or 3, A spring engagement cam portion for coupling a rotation angle determination spring for positioning the rotation angle of the conversion shaft in a predetermined state to the conversion shaft, and a plurality of projections provided in the spring engagement cam portion for the rotation angle determination spring At the same time, the notch of the concave shape is provided, and the notch is connected to the convex shape of the top of the arc, and the spring force of the spring for determining the rotation angle allows the protrusion to move from the peak to the notch instantaneously. The timer for a microwave oven characterized by the above-mentioned. The method according to claim 1 or 3, And a spring for the rotation angle determination for positioning the rotation shaft of the conversion shaft in a predetermined state by pushing the springs into the two divided cases. The method according to claim 1 or 3, At least one solder joint of the switches is arranged near the side wall of one split case used for assembling the switch, and at the same time, the height of the side wall facing the solder joint is lower than that of the other. Range timer. The method according to claim 1 or 3, The contact pieces or the contact pieces and the terminal body solder joints constituting the switch are soldered parts made of metal flat parts bent in the split case and bent in opposite directions, and are soldered so as to span both metal flat parts of the soldered parts. The timer for a microwave oven characterized by the above-mentioned. A microwave oven timer having a timer unit having a timer axis for setting a cooking time and a cooking setting unit for setting at least a range cooking time by operating a conversion shaft for converting a timing of a periodic operating body, wherein the timer axis and the conversion are performed. The shaft is fixed by a case body in which two upper and lower split cases are combined so that both axes are parallel, and the attachment ears for attaching to other equipment are projected substantially perpendicular to the both axes and to the side of the case body. The parallel mounting surface perpendicular to the two axes on the side with both shafts protruding out of the case body and parallel to the attaching side surface of the case body, and the two surfaces of the inclined mounting surface slightly inclined with respect to this parallel mounting surface. A timer for a microwave oven, which is provided. In the microwave oven timer having a timer unit having a timer shaft for setting the cooking time and a conversion shaft for switching the timing of the periodic operating body to set the output at least when cooking the range, the position of the conversion shaft A timer for a microwave oven, wherein an independent conversion shaft fixing block capable of providing an independent new conversion shaft for rotating the conversion shaft at another position is arranged on the projection side of the case body so as to surround the conversion shaft. . The microwave oven timer of any one of Claims 1, 3, 20 and 21 is squeezed inside the instruction control unit provided in the front part, and the conversion provided in the timer handle and the conversion shaft provided in the timer shaft. A microwave oven using a timer for a microwave oven, characterized in that the handle is disposed outside the instruction operation unit.