CN113217943A - Fire power adjusting device - Google Patents
Fire power adjusting device Download PDFInfo
- Publication number
- CN113217943A CN113217943A CN202110081020.6A CN202110081020A CN113217943A CN 113217943 A CN113217943 A CN 113217943A CN 202110081020 A CN202110081020 A CN 202110081020A CN 113217943 A CN113217943 A CN 113217943A
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- China
- Prior art keywords
- cam plate
- cam
- plate
- projection
- valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/002—Regulating fuel supply using electronic means
Abstract
A fire power adjusting device is provided, which uses the rotation of a cam plate (5) linked with an operating rod (4) to make a needle valve (3)1、32) Via the cam hole (51)1、512) And a pin, the heating power adjusting device is provided with a touch mechanism (8) for providing a click feeling when the cam plate rotates to a specified rotation range, and can prevent the cam plate from vibrating when the cam plate rotates beyond the specified rotation range for providing the click feeling. The touch mechanism is composed of a protrusion (81) provided on a fixing member (7) facing the back surface of the cam plate and protruding toward the cam plate, and a leaf spring (82) disposed on the front surface side of the cam plate and rotating together with the cam plate. A projection or a convex portion (825) provided on the leaf spring and protruding toward the cam plate side is passed through the through hole of the cam plate and is always pressed against the leaf spring or the fixing member. On the convexWhen the wheel plate rotates to a predetermined rotation range, the convex part abuts against the projection and rises, thereby giving a click feeling.
Description
Technical Field
The present invention relates to a fire power adjusting apparatus, including: a needle valve which is provided in the valve housing so as to be movable forward and backward and which can change the supply amount of the gas to the burner; a cam plate provided outside the valve housing and rotating in conjunction with the swing of the operating rod; and a pin fixed to the needle valve and engaged with a cam hole formed in the cam plate, wherein the heat power adjusting device adjusts the amount of gas supplied to the burner by advancing and retreating the needle valve through the cam hole and the pin by rotation of the cam plate.
Background
Conventionally, as such a heating power adjustment device, patent document 1 discloses a touch mechanism that provides a click feeling (or click feeling) when a cam plate is rotated to a predetermined rotation range. In the heating power adjustment device, the touch mechanism is constituted by a plate spring disposed to face the surface of the cam plate in a state of being locked against rotation with respect to the valve housing, and a stopper portion provided locally with a convex portion protruding toward the cam plate, the stopper portion being left by being cut away so as to receive the convex portion in an intermediate portion of an arc-shaped elongated hole formed in the cam plate. When the cam plate is rotated to a predetermined rotation range, the protruding portion abuts against the stopper portion and rises, thereby giving a click feeling. Further, conventionally, a disc spring is provided between the head of the pressing screw of the cam plate and the cam plate, and the disc spring is slightly compressed, thereby applying an appropriate rotational load to the cam plate.
In the above-described conventional example, when the cam plate is rotated beyond a predetermined rotation range in which a click feeling is given, the convex portion goes over the stopper portion, and the pressing of the stopper portion by the convex portion is suddenly released, so that the stopper portion vibrates. Further, the vibration is transmitted to the cam plate, and the needle valve is also vibrated via the cam hole and the pin, which may cause variation in the amount of fuel gas. Further, in the case where a disc spring for applying a rotational load to the cam plate is provided, there is a problem that the number of components increases.
Patent document
Patent document 1: japanese laid-open patent publication No. 5-306815
Disclosure of Invention
The present invention has been made in view of the above points, and an object thereof is to provide a fire power adjustment device capable of preventing vibration of a cam plate when the cam plate is rotated beyond a predetermined rotation range in which a click feeling is given, and reducing the number of components to reduce the cost.
In order to solve the above problem, the present invention is characterized by comprising: a needle valve which is provided in the valve housing so as to be movable forward and backward and which can change the supply amount of the gas to the burner; a cam plate provided outside the valve housing and rotating in conjunction with the swing of the operating rod; and a pin fixed to the needle valve and engaged with a cam hole formed in the cam plate, wherein the needle valve is advanced and retreated by rotation of the cam plate via the cam hole and the pin to adjust a gas supply amount to the burner, wherein the heat power adjusting device includes a touch mechanism for giving a click feeling when the cam plate is rotated to a predetermined rotation range, wherein, when a surface of the cam plate facing a valve housing side is set as a back surface, a surface opposite to the back surface is set as a front surface, and the valve housing facing the back surface of the cam plate or a member fixed to the valve housing is set as a cam plate facing member, the touch mechanism is composed of a protrusion provided on the cam plate facing member and protruding toward the cam plate and a leaf spring provided on the front surface of the cam plate and rotating together with the cam plate, and a protrusion protruding toward the cam plate is provided on a part of the leaf spring, the projection or the convex portion is pressed against the plate spring or the cam plate opposing member all the time through a through hole formed in the cam plate, and when the cam plate is rotated to the predetermined rotation range, the convex portion is lifted up by being brought into contact with the projection, thereby giving a click feeling.
According to the present invention, when the cam plate is rotated beyond the predetermined rotation range in which the click feeling is given, the convex portion passes over the protrusion, the pressing of the protrusion by the convex portion is suddenly released, and even if the vibration of the protrusion occurs, the protrusion is separated from the cam plate and is independent, and therefore the vibration of the protrusion is not transmitted to the cam plate. Therefore, the cam plate can be prevented from vibrating when the cam plate is rotated beyond a predetermined rotation range, and variation in the amount of gas due to the vibration can be prevented. Further, since the plate spring and the cam plate opposing member are always in pressure contact via the projection or the convex portion, a rotational load can be applied to the cam plate by a frictional force of the plate spring against the cam plate opposing member. This makes it possible to omit the disc spring of the conventional example for applying a rotational load, and to reduce the number of parts and thus to reduce the cost.
In the fire power adjusting apparatus, generally, the following are fixed to an outer surface of a valve housing: and a guide plate for forming a guide hole into which the pin is inserted and which is long in the advancing/retreating direction of the needle valve. In this case, the cam plate opposing member is preferably formed by a guide plate, and the members can be shared.
Drawings
Fig. 1 is a perspective view of a valve unit having a fire power adjusting apparatus according to an embodiment of the present invention.
Fig. 2 is a top view of the valve unit of fig. 1.
Fig. 3 is a side view of a portion of the valve unit of fig. 1 where a needle valve is disposed.
Fig. 4 is a top view taken along line IV-IV of fig. 3.
Fig. 5 is a perspective view of the valve unit of fig. 1 in a partially exploded state.
Fig. 6 is an enlarged sectional view taken along line VI-VI of fig. 2.
Fig. 7 is a graph showing the relationship between the rotational position of the cam plate, the gas supply amount, and the rotational load of the cam plate.
Description of the reference numerals
Fire regulator A …, burner B …, 2 … valve casing, 31、32… needle valve, 4 … operating lever, 5 … cam plate, 511、512… cam hole, 53 … through hole, 61、62… Pin, 7 … guide plate, 711、712… guide hole, 8 … touch mechanism, 81 … protrusion, 82 … leaf spring, 825 … convex portion.
Detailed Description
The heating power control apparatus a according to the embodiment of the present invention shown in fig. 1 and 2 can change the amount of gas supplied to the burner B having the main burner Ba of large capacity and the sub burner Bb of small capacity. The fire power adjusting apparatus a is provided in an upper portion of a valve unit 1, wherein the valve unit 1 is provided with: an operation member 11 which is pushed and operated by an ignition key-off button on the front surface of the cooktop body, not shown. At the lower part of the valve unit 1, although not shown, are mounted: an electromagnetic safety valve and an opening and closing valve on the downstream side thereof. When the operating member 11 is pushed backward, the electromagnetic safety valve is forcibly opened, and the on-off valve is opened to supply gas to the stove burner B.
As shown in fig. 4, the fire power control apparatus a includes, in a valve housing 2 at an upper portion of a valve unit 1: 1 st needle valve 3 for main burner Ba disposed to advance and retreat freely in the front-rear direction1And the 2 nd needle valve 3 for the sub-burner Bb2. The valve housing 2 is formed with: 1 st gas outlet 211It is connected with the main burner Ba; 2 nd gas outlet 212Which is connected with the secondary burner Bb; 1 st valve chamber 231Through the 1 st valve hole 221And 1 st gas outlet 211A communication opening which is long in the front-rear direction and opens forward (rightward in fig. 4) of the valve housing 2; 2 nd valve chamber 232Through the 2 nd valve hole 222And 2 nd gas outlet 212A communication part which is opened to the front of the valve housing 2 in the front-rear direction; 1 st gas inlet 241A gas passing through the on-off valve flows into the 1 st valve chamber 231(ii) a And 2 nd gas inlet 242A gas flowing through the on-off valve into the 2 nd valve chamber 232. And, in the 1 st valve chamber 231And 2 nd valve chamber 232In the middle, a 1 st needle valve 3 is slidably inserted from the front1And 2 nd needle valve 32。
1 st needle valve 31And 2 nd needle valve 32The rear end portion has: can be connected with the 1 st valve hole 221And the 2 nd valve hole 222The engaged needle part 31a、32a. And even at each needle portion 31a、32a and each valve hole 221、222Bypass hole 3 capable of allowing gas to flow even in a fitted state1b、32b. In addition, the 1 st valve chamber 231A stepped shape with a small diameter at the rear part is formed in the 1 st valve chamber 231Large diameter portion 231a is provided with a 1 st gas inlet 241. In the 1 st needle valve 31Of the slave needle part 31a part slightly separated forward is provided with a second part1 valve chamber 231Rear minor-diameter portion 23 of1b an O-ring 3 fitted therein1c. And, in the O-ring 31c and the 1 st valve chamber 231Small diameter portion 231b is engaged with the main burner Ba, and the gas is not supplied through the 1 st needle valve 31Moving forward, O-ring 31c from the 1 st valve chamber 231Small diameter portion 231b to the large diameter portion 231at time a, the gas starts to be supplied to the main burner Ba.
Referring to fig. 1 to 5, the heat power adjustment device a further includes: a cam plate 5 provided outside the valve casing 2 and rotating in conjunction with the swing of the operating lever 4 protruding forward from the front surface of the cooktop body, not shown; and the 1 st pin 61And 2 nd pin 62They are fixed to the 1 st needle valve 31And 2 nd needle valve 32And the 1 st cam hole 51 formed in the cam plate 51And 2 nd cam hole 512And (4) clamping. The cam plate 5 is formed with a shaft support hole 52, the shaft support hole 52 is externally fitted to a boss portion 25 provided to protrude from the upper surface of the valve housing 2, and the cam plate 5 rotates with the boss portion 25 as a fulcrum. Further, a guide plate 7 located below the cam plate 5 is fixed to an outer surface, i.e., an upper surface of the valve housing 2. The guide plate 7 is formed with: for the 1 st pin 61And 2 nd pin 62Inserted and acting as the 1 st needle valve 31And 2 nd needle valve 321 st guide hole 71 long in the forward and backward direction of the advancing and retreating direction1And the 2 nd guide hole 712. Further, each guide hole 711、712Slightly inclined toward the lateral direction with respect to the front-rear direction so that each needle valve 31、32The movable body moves in the front-rear direction while slightly rotating. Further, the operation lever 4 is integrally provided to the cam plate 5.
If the cam plate 5 is rotated counterclockwise in the drawing from the minimum fire position shown in fig. 1 and 2, the cam plate 1 passes through the first cam hole 511And the 1 st pin 611 st needle valve 31Moving forward from the position shown in fig. 4, the gas supply amount to the main burner Ba changes as shown by the line a in fig. 7, and passes through the 2 nd cam hole 512And 2 nd pin 622 nd needle valve 32Moving forward from the position shown in fig. 4, the gas supply amount to the sub-burner Bb changes as shown by the line b in fig. 7.
Here, if the cam plate 5 is rotated slowly within a predetermined rotation range θ a including a rotation position at which the gas starts to be supplied to the main burner Ba, there is a possibility that backfire occurs in the main burner Ba. Therefore, it is preferable to impart a click feeling when the cam plate 5 is rotated to the rotation range θ a so that the cam plate 5 is rotated abruptly within the rotation range θ a.
Therefore, in the present embodiment, there are provided: and a touch mechanism 8 for giving a click feeling when the cam plate 5 is rotated to the rotation range θ a. Hereinafter, the touch mechanism 8 will be described in detail with a surface (lower surface) of the cam plate 5 facing the valve housing 2 being set as a rear surface, a surface (upper surface) opposite to the rear surface being set as a front surface, and the valve housing 2 facing the rear surface of the cam plate 5 or a member fixed to the valve housing 2 being set as a cam plate facing member. The touch mechanism 8 includes a projection 81 provided on the cam plate opposing member and projecting upward toward the cam plate 5, and a plate spring 82 disposed on the front surface side of the cam plate 5. In the present embodiment, the guide plate 7 constitutes the cam plate opposing member, and the projection 81 is formed on the guide plate 7. A shaft support hole 821 is formed in the plate spring 82, and the shaft support hole 821 is externally fitted to the boss portion 25 on the upper surface of the valve housing 2 in common with the shaft support hole 52 of the cam plate 5. The plate spring 82 is pressed from above by a pressing screw 83 screwed to the boss portion 25. As shown in fig. 6, the projection 81 is pressed against the front end 822 of the plate spring 82 from below through the through hole 53 formed in the cam plate 5. The plate spring 82 is provided with: the plate spring 82 rotates together with the cam plate 5 by the claw portions 823 and 824 engaging with the locking hole 54 and the notch 55 formed in the cam plate 5.
A projection 825 projecting downward toward the cam plate 5 is provided at a circumferential center of the distal end 822, which is a part of the plate spring 82. When the cam plate 5 is rotated to the above-described rotation range θ a, the convex portion 825 abuts on the projection 81 and rises, and the rotation load of the cam plate 5 increases as indicated by a line c in fig. 7, thereby giving a click feeling. Therefore, in the above-described rotation range θ a of the cam plate 5, the force applied to the operating rod 4 is enhanced to oppose the increased rotational load, thereby rotating the cam plate 5 abruptly, and the backfire at the main burner Ba can be prevented.
Here, when the cam plate 5 is rotated beyond the rotation range θ a in which the click feeling can be given, the convex portion 825 goes over the protrusion 81, and the pressing of the protrusion 81 by the convex portion 825 is suddenly released, so that the vibration of the protrusion 81 is likely to occur. However, even if the vibration of the projection 81 occurs, since the projection 81 is separated from and independent of the cam plate 5, the vibration of the projection 81 is not transmitted to the cam plate 5. Therefore, the cam plate 5 can be prevented from vibrating when the cam plate 5 is rotated beyond the rotation range θ a, and variation in the amount of gas due to the vibration can be prevented.
Further, since the plate spring 82 that rotates together with the cam plate 5 and the projection 81 provided on the guide plate 7 as the cam plate opposing member are always in pressure contact with each other, a rotational load can be applied to the cam plate 5 by the frictional force of the plate spring 82 against the projection 81. In the present embodiment, a downward pressing force acts on the periphery of the shaft support hole 821 of the plate spring 82 with the pressing screw 83 as a fulcrum, as the tip 822 of the plate spring 82 is raised by the projection 81. Further, since the peripheral portion of the shaft support hole 52 of the cam plate 5 is pressed against the valve housing portion around the boss portion 25 by the pressing force, a rotational load is applied to the cam plate 5 by the frictional force of the cam plate 5 against the valve housing 2. Therefore, the disc spring of the conventional example to which the rotational load is applied can be omitted, and the number of parts can be reduced to reduce the cost. Further, by forming the protrusions 81 on the guide plate 7, the components can be shared, and further cost reduction can be achieved.
However, it is also possible to form in the valve housing 2: and the 1 st guide hole 711And the 2 nd guide hole 712The guide plate 7 is omitted from the corresponding guide hole, the cam plate opposing member is constituted by the valve housing 2 itself, and the projection 81 is integrally formed in the valve housing 2. However, since the valve housing 2 is usually made of aluminum die-cast, a lead is formed in the valve housing 2The guide hole, or the protrusion 81, may make it difficult to ensure durability. Therefore, it is preferable that the guide plate 7 is provided as in the above-described embodiment, the cam plate opposing member is constituted by the guide plate 7, and the projection 81 is formed on the guide plate 7.
In the above embodiment, as shown in fig. 3, the guide plate 7 floats on the valve housing 2 to form the 1 st valve chamber 231And the 2 nd valve chamber 232And the cam plate 5 also floats on the upper surface of the guide plate 7. Therefore, the projection 26 that abuts the lower surface of the guide plate 7 is provided to protrude from the upper surface of the distal end of the valve housing 2, and it is possible to prevent: the guide plate 7 is bent downward by the downward pressing force acting on the projection 81 from the plate spring 82, and the projection 72 abutting against the lower surface of the front end of the cam plate 5 is provided at the front end of the guide plate 7, so that the operation lever 4 can be prevented from being inclined downward when the operation lever 4 is operated.
The embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited thereto. For example, in the above embodiment, the projection 81 provided on the cam plate opposing member (guide plate 7) is passed through the through hole 53 formed in the cam plate 5 and is always pressed against the plate spring 82, but the projection 81 may be formed to be larger than the projection 825 provided on the plate spring 82 without reaching the surface of the cam plate 5, and the projection 825 may be passed through the through hole 53 formed in the cam plate 5 and is always pressed against the cam plate opposing member. In this case, when the cam plate 5 rotates to the predetermined rotation range θ a, the convex portion 825 abuts against the projection 81 and rises, thereby giving a click feeling.
The heating power adjusting apparatus a of the above embodiment has a pair of 1 st needle valves 31And 2 nd needle valve 32However, the present invention can be applied to a fire power adjusting apparatus having a single needle valve as well. Further, in the above-described embodiment, the operation lever 4 is integrally formed with the cam plate 5, but the cam plate 5 and the operation lever 4 may be provided separately, and the cam plate 5 may be rotated by the swing of the operation lever 4 via an appropriate interlocking mechanism.
Claims (2)
1. A fire power adjusting device, which is provided with a fire power adjusting device,
the fire power adjusting device is provided with: a needle valve which is provided in the valve housing so as to be movable forward and backward and which can change the supply amount of the gas to the burner; a cam plate provided outside the valve housing and rotating in conjunction with the swing of the operating rod; and a pin fixed to the needle valve and engaged with a cam hole formed in the cam plate,
the needle valve is advanced and retreated by the rotation of the cam plate through the cam hole and the pin, thereby adjusting the gas supply amount to the burner,
the heating power adjustment device is provided with a touch mechanism for giving a click feeling when the cam plate is rotated to a predetermined rotation range,
when the surface of the cam plate facing the valve housing side is set as a back surface, the surface opposite to the back surface is set as a front surface, and the valve housing facing the back surface of the cam plate or a member fixed to the valve housing is set as a cam plate facing member, the touch mechanism is composed of a projection provided on the cam plate facing member and protruding toward the cam plate side, and a leaf spring disposed on the front surface side of the cam plate and rotating together with the cam plate,
the plate spring is provided with a projection projecting toward the cam plate in a part thereof, the projection or the projection is pressed against the plate spring or the cam plate opposing member all the time through a through hole formed in the cam plate, and when the cam plate is rotated to the predetermined rotation range, the projection abuts against the projection and is lifted, thereby giving a click feeling.
2. The fire power adjustment apparatus of claim 1,
on the outer surface of the valve housing, fixed are: a guide plate for forming a guide hole into which the pin is inserted and which is long in the advancing/retreating direction of the needle valve,
the cam plate opposing member is constituted by a guide plate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-015985 | 2020-02-03 | ||
| JP2020015985A JP7307002B2 (en) | 2020-02-03 | 2020-02-03 | thermal control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113217943A true CN113217943A (en) | 2021-08-06 |
Family
ID=77084479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110081020.6A Pending CN113217943A (en) | 2020-02-03 | 2021-01-21 | Fire power adjusting device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7307002B2 (en) |
| CN (1) | CN113217943A (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5962920B2 (en) | 2013-03-06 | 2016-08-03 | リンナイ株式会社 | Gas cock |
| JP5963799B2 (en) | 2014-04-18 | 2016-08-03 | リンナイ株式会社 | Thermal power control device |
| JP6517604B2 (en) | 2015-06-25 | 2019-05-22 | 株式会社パロマ | Gas stove |
-
2020
- 2020-02-03 JP JP2020015985A patent/JP7307002B2/en active Active
-
2021
- 2021-01-21 CN CN202110081020.6A patent/CN113217943A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2021124216A (en) | 2021-08-30 |
| JP7307002B2 (en) | 2023-07-11 |
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