JP5441992B2 - Thermal power control device - Google Patents

Description

  The present invention mainly relates to a thermal power control device for adjusting the thermal power of a gas stove.

  As a conventional thermal power control device of this type, it has a plate-like lever that swings in the horizontal direction, and the piezoelectric element hammer is moved in the middle of moving this lever from the fully closed position at the left end to the fully open position at the right end. Is moved against the urging force, and a hammer is made to collide with the piezoelectric element before the fully open position to generate a high voltage to cause a spark discharge in the gas burner and to ignite the gas burner (for example, , See Patent Document 1).

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

  In the conventional thermal power control device, when the ignition is performed by swinging the lever to the right from the fully closed position, the force for moving the hammer against the biasing force is all provided by the force for operating the lever. Therefore, the feeling of operation of the lever at the time of ignition operation becomes very heavy.

  In addition, since the lever is swingably mounted, there is a gap between it and the movable part of the gas stove, but this gap becomes loose and the lever is slightly moved up and down when operating within the range of thermal power control. As a result, the gas stove equipped with this thermal power control device is impeded by the high-quality feeling and the commercial value is lowered.

  Therefore, in view of the above problems, the present invention can reduce the operating force when ignition is performed with the lever for adjusting the thermal power as much as possible, and the lever does not rattle during the thermal power adjusting operation after ignition. It is an object to provide a thermal power control device.

In order to solve the above-described problem, the thermal power control apparatus according to the present invention holds a lever that adjusts the thermal power by swinging in the horizontal direction so that the lever can swing in the vertical direction, and the lever moves from the fully closed position toward the fully open position. When Ru is swung, the閉子in conjunction with the swinging rotate a combustion control system to increase or decrease the flow rate of the gas, it is provided by separating the rotation center of the swing center and閉子lever When the lever rotation angle is larger than the lever swing angle and the lever is swung from the fully closed position, the lever is pushed down to release the locked state of the lever. An urging means for urging in the unlocking direction and assisting the operation force in the lever pressing-down direction is provided.

  In order to ignite the gas burner with the above configuration, it is necessary to swing the lever from the fully closed position toward the fully open position, and for this purpose, it is necessary to release the lock. To release the lock, the tip of the lever must be pushed down, but by assisting the operating force in the push-down direction with the biasing force of the biasing means, the lever tip can be pushed down with a small force to release the lock. .

  It is desirable that the urging means always urges the lever in one direction in a state where the lever is in the heating power adjustment range to prevent backlash during operation of the lever.

  As is clear from the above description, the present invention has a small operation force for unlocking when the lever is swung toward the fully open position in order to perform ignition from the fully closed position where the burner is extinguished. Good.

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)

When the lever for thermal power adjusted by swinging in a horizontal direction pivotably held in the vertical direction, Ru is swung towards the fully open position the lever from the fully closed position,閉子in conjunction with the swing Is a thermal power control device that increases or decreases the flow rate of gas, and is provided with the swing center of the lever and the rotation center of the closing member spaced apart to make the rotation angle of the closing member larger than the swinging angle of the lever. When the lever is swung from the fully closed position, it is configured to release the locked state by pushing down the tip of the lever, and the lever is urged in the unlocking direction to operate the lever in the pushing down direction. A thermal power control device provided with an urging means for assisting power.   2. The thermal power control apparatus according to claim 1, wherein the biasing unit constantly biases the lever in one direction while the lever is in a thermal power control range to prevent rattling during operation of the lever.

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