JP5464381B2 - Thermal power control device - Google Patents

Description

  The present invention relates to a thermal power control apparatus that is mainly built in a gas stove and adjusts the amount of gas supplied to a gas burner of the gas stove.

  As a conventional thermal power control device of this type, a single plate-like lever is provided so as to swing horizontally, and gas is supplied to the gas burner together with the ignition operation by swinging the lever from the fully closed position to the fully open position. There is known one that can open a passage. After the gas burner is ignited, the heating power of the gas burner is adjusted by increasing or decreasing the opening degree of the opened passage (see, for example, Patent Document 1).

JP-A-63-58018 (5th page, FIG. 1, FIG. 4)

  In the above conventional apparatus, ignition is performed by swinging a fully closed lever in the fully open direction. For this reason, when the lever swings in an unexpected state, such as when a part of the body contacts the lever while working in the kitchen, the ignition device may be activated. In addition, there is a proposal that performs the ignition operation and the thermal power adjustment operation with separate levers and push buttons, but there is a market need for the one that performs the ignition and thermal power adjustment operation with one lever because the operation is simple. To do.

  Accordingly, in view of the above-described problems, the present invention has an object to provide a thermal power control apparatus that can perform an ignition operation and a thermal power adjustment operation with a single lever and that does not perform an accidental ignition operation. To do.

In order to solve the above problems, the thermal power control apparatus according to the present invention is configured to change the gas supply state to the burner by rotating a closing member interposed in a gas passage for supplying gas to the burner within a predetermined angle range. A heating power adjusting device that adjusts from a closed state to a fully open state, wherein a lock pin is provided on the rotation axis of the above-mentioned closing member, and this lock pin is locked at a position where the closing member is in a fully closed state and prohibits rotation of the closing member, By pushing down along this axis of rotation, it is provided so as to be able to advance and retreat from the unlocking position where the rotation of the closing member is permitted, and an urging means for urging the lock pin to the locking position side is attached, and the closing member is fully closed. When the lock pin is pushed down from the locked position to the unlocked position against the urging force of the urging means when rotating from the state toward the fully open state, the front end of the lock pin is straddled. A plate-like lever is provided so as to rotate the closing member by swinging the lever, and by pushing down the tip of the lever, the lock pin is pushed down from the locked position to the unlocked position on the lower surface of the lever. The lever is not allowed to swing from the fully closed position toward the fully open position unless the tip of the lever is pushed down , and the lock pin is pushed down at the fully closed position. In the state where the closing member continues to rotate in the fully open state, a mechanism is provided that does not return upward even if the force in the pushing-down direction against the lock pin is released, and the center of rotation of the lever and the rotation center of the closing member are separated. The lower surface of the lever is separated from the tip of the lock pin while the lever is swung from the fully closed position to the fully open position .

  If the lock pin is in the locked position, the lever will not move even if the lever is swung from the fully closed position to the fully open direction. To move the lever, it is necessary to push down the front end of the lever and push the lock pin down to the unlock position. Then, by closing the lever in the fully open direction while keeping the unlocked position, the closing member rotates.

  By the way, the swing center of the lever may be made to coincide with the rotation axis of the closing member, but in this configuration, the closing member can be rotated only by the swing angle of the lever. In order to make the rotation angle of the closing member larger than the swinging angle of the lever, it is necessary that the swinging center of the lever and the rotation center of the closing member are separated from each other. However, with this configuration, the contact point between the lower surface of the lever and the tip of the lock pin moves as the lever swings. That is, the lower surface of the lever is rubbed with the tip of the lock pin. When the lever is swung while the tip of the lever is pressed down, the lower surface of the lever and the tip of the lock pin are worn by this rubbing.

Therefore, in such a case, the lock pin remains upward even if the force in the push-down direction against the lock pin is released in a state in which the lock pin continues to rotate in the fully-opened direction while being pushed down in the fully-closed position. It has a mechanism that does not return, and the center of swing of the lever is away from the center of rotation of the closure, so that the lower surface of the lever moves away from the tip of the lock pin while swinging the lever from the fully closed position to the fully open position. I did . This reduces wear on the lower surface of the lever.

  In addition, a partition wall is provided in front of the closing member to prevent liquid from entering from the front toward the closing member, and the lever is extended to the front beyond the partition wall so that the lever is moved from the fully closed position. The lever may be lifted upward along the upper edge of the partition wall while swinging to the fully open position, and the lower surface of the lever may be separated from the tip of the lock pin.

  As is clear from the above description, the present invention cannot swing the lever toward the fully open position unless the tip of the lever is depressed once. It is possible to prevent the movement toward the fully open position.

The perspective view of the thermal-power adjustment apparatus by one embodiment of this invention Side view of the thermal power control device Plan view showing the swinging state of the lever Diagram showing the relationship between lever movement and bulkhead shape Diagram showing the direction of force applied from the lever to the connecting pin The figure which shows other embodiment.

  Referring to FIGS. 1 and 2, reference numeral 1 denotes a thermal power control apparatus according to the present invention. Reference numeral 2 denotes a heating power adjusting lever, which is connected by a pin 23 to a bracket 22 that is swingably held around a swing shaft 21. A spring 24 described later is contracted between the bracket 22 and the lever 2.

  In the above configuration, the lever 2 can swing around the swing shaft 21 in the left-right direction, and can swing around the pin 23 in the up-down direction. The spring 24 acts to urge the tip of the lever 2 downward.

  The thermal power control apparatus 1 incorporates a closing member (not shown) conventionally known from Japanese Patent Laid-Open No. 9-159053. The closing member has a truncated cone shape, and an opening serving as a gas passage is formed on the peripheral surface. An opening is also formed in the peripheral wall in which the closing element is accommodated. When the opening in the surrounding wall and the opening in the closing element coincide with each other, the gas is supplied to the downstream gas burner through the matching part. Then, by rotating the closure and increasing the area of the coincident part, the amount of gas supplied to the gas burner increases and the thermal power increases, and conversely, if the area of the coincident part decreases, it is supplied to the gas burner. The amount of gas generated decreases and the thermal power becomes smaller. When the area of the matching part is further reduced and the area of the matching part becomes zero (fully closed state), no gas is supplied to the gas burner, and the gas burner is extinguished.

  This closing member is housed below the lock pin 4. A connecting pin 31 that rotates around the lock pin 4 is connected to the closing member. Accordingly, when the connecting pin 31 is rotated around the lock pin 4, the closing member housed below rotates at the same angle. However, the lock pin 4 locks the closing member so that the closing member does not rotate when the closing member is in a fully closed state. When the locking pin 4 is in the lock position shown in the drawing, the connecting pin 31 is rotated even if it is rotated. I can't.

  The lock pin 4 is urged upward, and when the lock pin 4 is pushed down against the urging force, the position of the lock pin 4 becomes the lock release position and the locked state is released. In this state, the connecting pin 31 can be rotated to rotate the closing member. However, the rotating torque is continuously applied to the connecting pin 31, that is, the closing member is continuously rotating. Then, there is provided a mechanism in which the lock pin 4 does not return upward even if the force in the push-down direction with respect to the lock pin 4 is released. Since this mechanism is known from the above-mentioned Japanese Patent Application Laid-Open No. 9-159053 and the like, a detailed description thereof will be omitted. However, if the closure is rotated while the lock pin 4 is pushed down, the closure will be fully opened. It can rotate to the ignition position set in the position beyond the position, and at that ignition position, the micro switch is turned on, the ignition device (not shown) is activated, and spark discharge is started to the gas burner. In this state, the closing member is the same as in the fully open state, so that gas is ejected from the gas burner and ignited by the spark.

  When the rotational torque with respect to the connection pin 31 is released, the lock pin 4 returns upward by the biasing force. Disappear. Even if the lock pin 4 returns upward, the lock function by the lock pin 4 does not operate until the closing member is returned to the fully closed position and the gas burner is extinguished. As a result, the closing member is in the fully closed state and the fully open position. The heating power can be freely rotated within a heating power adjustment range sandwiched between them, and the heating power of the gas burner is adjusted according to the rotation angle.

  Returning to FIG. 1, a long hole 25 is formed in the middle of the lever 2, and the connecting pin 31 is inserted into the long hole 25 in a state where the lever 2 is attached to the bracket 22.

  In addition, 11 is a partition, and when liquid material, such as water, is applied from the front, it dams up so that the liquid material may not reach the part in which the closure is incorporated. At the same time, as will be described later, when the tip of the lever 2 is pushed down, the lever 2 is restricted from being pushed down more than necessary. Specifically, when the lever 2 is pushed down, a downwardly protruding convex portion 26 formed on the lever 2 comes into contact with the upper edge of the partition wall 11 so that the lever 2 is not pushed down any more. Further, a convex portion 26 is formed in order to reduce the frictional force when the lever 2 is pushed down and swung left and right while being in contact with the upper edge of the partition wall 11. Further, when a large force is instantaneously applied to the front end of the lever 2 in the left-right direction, that is, in the heating power adjusting direction, the lever 2 comes into contact with the safety walls 32a and 32b, and the force is not limited. A safety claw 27 was formed on the lever 2.

  The operation of the thermal power control apparatus 1 having the above configuration will be described with reference to FIGS. Since the long hole 25 of the lever 2 is engaged with the connecting pin 31, when the lever 2 swings from the fully closed position shown in the drawing toward the fully open position, the connecting pin 31 rotates to rotate the closing member. become. However, since the lock by the lock pin 4 is acting in the fully closed position, the lever 2 cannot be swung from the fully closed position unless the locked state is released.

  As described above, it is necessary to push down the lock pin 4 in order to release the locked state. Therefore, when the tip of the lever 2 is pushed down, the lower surface of the lever 2 comes into contact with the tip of the lock pin 4 and pushes down the lock pin 4. However, since the lock pin 4 is biased upward, in order to push down the tip of the lever 2, it is necessary to push down the tip of the lever 2 against the biasing force biasing the lock pin 4 upward. is there. Here, since the urging force of the spring 24 acts in the direction of lowering the tip of the lever 2, the force required to actually push down the tip of the lever 2 by the urging force of the spring 24 is reduced. Even when the lever 2 is not touched, the lever 2 is urged downward by the urging force of the spring 24, so that rattling of the lever 2 can be prevented and the lever 2 can be operated while holding the tip of the lever. Feeling is improved.

  As described above, when the lever 2 is swung from the fully closed position toward the fully open position, first, the tip of the lever 2 is pushed down to bring the lock pin 4 to the unlocked position. In this state, the convex portion 26 of the lever 2 is in contact with the upper edge low portion 11 a of the partition wall 11. If the lever is swung in the right direction as it is, the convex portion 26 moves along the upper edge low portion 11a, but the tip of the lock pin 4 rubs the lower surface of the lever 2. When the lever 2 is further swung, the convex portion 26 rides on the upper edge high portion 11b.

  In a state where the lever 2 continues to swing, the lock pin 4 keeps being lowered even if the pressing force on the lock pin 4 is released. Therefore, when the convex portion 26 rides on the upper edge high portion 11b, the lever 2 is separated from the tip of the lock pin 4, and the lock pin 4 does not rub against the lower surface of the lever 2.

  When the lever 2 is further swung to the right, the lever 2 is swung to the ignition position beyond the fully open position. When ignition to the gas burner is confirmed here, the lever 2 is released. Then, the lever 2 is pushed up by the lock pin 4 returning upward and returned to the fully open position. In this state, since the gas burner is ignited, the heating power of the gas burner can be adjusted by moving the lever 2 within the heating power adjustment range. When the lever 2 is finally returned to the fully closed position, the lock by the lock pin 4 is activated, and the lever 2 cannot be swung rightward unless the lever 2 is pushed down again.

  In the above embodiment, the top edge of the lock pin 4 is placed on the lower surface of the lever 2 during the swinging of the lever 2 by making the upper edge of the partition wall 11 in two stages of the upper edge low portion 11a and the upper edge high portion 11b. However, a concave portion may be formed on the lower surface of the lever 2 so that the concave portion escapes from the tip of the lock pin 4 during the swinging.

  Referring to FIG. 5, in the above configuration, the direction F of the rotational force applied to the connecting pin 31 by the swing of the lever 2 and the direction M in which the connecting pin 31 tries to move do not coincide with each other. This is because the swing center 21 of the lever 2 and the rotation center of the connecting pin 31 (the installation position of the lock pin 4) do not coincide with each other. This is to increase the rotation angle. However, if the direction F of the rotational force and the moving direction M do not coincide with each other, the force in the swinging direction with respect to the lever 2 is not efficiently transmitted as the rotational force to the connecting pin 31, and as a result, the feeling of operation of the lever 2 becomes heavy. The trouble to say arises.

  Therefore, in such a case, as shown in FIG. 6, the large gear 5 is rotated by swinging the lever 2, and the closing member is rotated in conjunction with the small gear 51 meshing with the large gear 5. May be. With this configuration, the operating force on the lever 2 can be efficiently made the rotational force of the closing member, and the feeling of operation of the lever 2 is lightened. Further, by changing the gear ratio, the ratio between the swing angle of the lever 2 and the rotation angle of the closing member can be freely changed.

  Further, in the above configuration, the width of the tip of the lever 2 is made narrower than the width of the other portion so that when an unnecessarily large force is applied to the tip, the tip portion is deformed to absorb the force. As shown in FIG. 5, a notch 2a may be provided to positively deform the notch 2a and absorb the force.

  In addition, this invention is not limited to an above-described form, You may add a various change in the range which does not deviate from the summary of this invention.

1 Thermal power control device 2 Lever 4 Lock pin

Claims (2)

A heating power adjusting device that adjusts a gas supply state to a burner from a fully closed state to a fully open state by rotating a closing member interposed in a gas passage for supplying gas to the burner within a predetermined angle range, A lock pin is provided on the axis of rotation of the above-mentioned closure, and the lock pin is allowed to rotate by closing the lock pin along the axis of rotation, which locks the closure when the closure is fully closed. And an urging means for urging the lock pin toward the lock position and attaching the urging means to rotate the closing element from the fully closed state to the fully open state. When the lock pin is pushed down from the locked position to the unlocked position against the urging force of the plate, a plate-like lever that extends forward across the tip of the lock pin is swung. The above-mentioned closure is rotated so that the lock pin is pushed down from the locked position to the unlocked position on the lower surface of the lever by pushing down the lever tip. If the lever tip is not pushed down, the lever is fully closed. The lock pin cannot be swung from the position toward the fully open position , and the lock pin is pushed down at the fully closed position and continues to rotate the closing element in the fully open direction. Equipped with a mechanism that does not return upward even when the force in the push-down direction against the lock pin is released. The swing center of the lever is separated from the rotation center of the closure, and the lever swings from the fully closed position to the fully open position. A thermal power control device characterized in that the lower surface of the lever is separated from the tip of the lock pin on the way . A partition wall is provided in front of the closing member to prevent liquid from entering from the front toward the closing member, and the lever is extended to the front beyond the partition wall so that the lever is moved from the fully closed position to the fully opened position. middle of the swing lever is lifted upward along the upper edge of the partition wall to, combustion control system according to claim 1, characterized in that the lower surface of the lever is away from the tip of the lock pin.

Images