JP2006105557A - Stove operation knob - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an operation knob to be connected to the operation shaft of a stove heat source controller, the operation knob being formed of a metal to be expensive-looking and the heat source controller being free of trouble due to the input of excessive torque when a user turns the operation knob with strong force. <P>SOLUTION: The operation knob comprises a metal knob body 81 and a cylindrical joint member 82 formed of a synthetic resin to be a connection portion to the operation shaft 7a of the heat source controller. The joint member 82 can be fitted to a fitted portion 81c formed on the reverse of the knob body 81 in various kinds of phases. A pawl portion 81e extends from the edge of the fitted portion 81c and the pawl portion is caulked to engage with a flange portion 82c formed in the middle of the joint member 82, thus preventing the come-off of the joint member 82 from the fitted portion 81c. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an operating knob for a stove connected to an operating shaft of a controller for a heat source of the stove.

  A stove, for example, a gas stove, is provided with a valve unit that controls gas supply to a burner as a heat source as a heat source controller. The valve unit is provided with an operating shaft. The operating knob is connected to the operating shaft in a non-rotating state, and the burner is turned off and the heating power is adjusted via the valve unit by rotating the operating knob. (For example, refer to Patent Document 1). The operation knob is generally formed of a synthetic resin.

  Recently, there has been an increasing demand for glass top stoves in which the top plate of the stove is made of glass due to its good appearance and cleanability. In the case of placing an operation knob on the top surface of a glass top plate on a glass top stove, if the operation knob is made of synthetic resin, the operation knob feels cheap and impairs the sense of quality of the glass top plate. . Therefore, it is considered that the operation knob is made of metal to make it heavy and luxurious. However, it has been found that the following problems occur when a metal operation knob is used.

In other words, the rotation range of the operation knob is limited between the fire extinguishing position and the maximum thermal power position by a stopper mechanism incorporated in the valve unit (heat source controller). The operation knob may be rotated with a strong force (torque), the stopper mechanism may be damaged due to excessive torque, and the heat source controller may break down. If the operation knob is made of synthetic resin, the operation knob itself will break if a strong torque is applied, so the stopper mechanism will not be damaged, but if the operation knob is made of metal, the operation knob will not be damaged even if a strong torque is applied. There is a possibility that torque does not break and the torque is directly input to the heat source controller and the heat source controller breaks down.
JP-A-11-351572

  In view of the above, the present invention has an object to provide an operating knob for a stove which is made of metal and can prevent an excessive torque from being input to a heat source controller. .

  In order to solve the above-described problems, the present invention provides an operation knob connected to an operation shaft of a controller for a heat source of a stove, wherein the knob main body is made of metal, and a connection portion for the operation shaft is provided on the back side of the knob main body. A cylindrical joint member made of synthetic resin is attached.

  According to said structure, since the knob main body which appears in an external appearance is metal, an operation knob becomes heavy and has a high-class feeling. In addition, during the operation of the operation knob, the torque applied to the knob body is normally transmitted to the operation shaft via the joint member. However, when the torque exceeds a predetermined limit, the synthetic resin joint member is damaged and the torque is increased. It is not transmitted to the operation axis. That is, even if the knob body is made of metal, the joint member functions as a torque limiter, and an excessive torque is prevented from being input to the heat source controller.

  Here, in order to attach the joint member to the knob body, a joint fitting portion may be formed on the back side of the knob body, and the joint member may be fitted to this from the axial direction. In this case, it is necessary to prevent the joint member from coming off in the axial direction with respect to the joint fitting portion. Therefore, it is conceivable to attach a split pin that penetrates the joint member in the radial direction to the joint fitting portion to prevent the joint member from coming off. However, this increases the number of parts and increases the cost. On the other hand, the flange part adjacent to the part fitted to the joint fitting part is formed on the joint member, the claw part is extended to the edge of the joint fitting part, and the claw part is engaged with the flange part. If the joint member is prevented from being detached from the joint fitting portion by caulking, it is not necessary to separately provide a part such as a split pin for preventing the joint member from coming off, thereby reducing costs. Is advantageous.

  Further, the joint member needs to be prevented from rotating with respect to the joint fitting portion. Here, if the outer peripheral surface of the joint member and the inner peripheral surface of the joint fitting portion are formed in a D-shaped cross section, the joint member can be prevented from rotating with respect to the joint fitting portion. The mounting phase is uniquely determined. By the way, when there is a model with a different arrangement direction of the heat source controller as a stove model, in order to make the end position of the operation range of the operation knob the same direction regardless of the model, it is a joint member to the knob body. Need to be mounted in different phases. And in order to change the attachment phase of the joint member with respect to the knob body with the above-described one, it is necessary to manufacture a knob body in which the phase of the joint fitting portion having a D-shaped cross section is different.

  On the other hand, a female or male second engaging portion that engages with a male or female first engaging portion formed on the outer peripheral surface of the joint member is formed on the joint fitting portion, and the first The joint member is prevented from rotating with respect to the joint fitting portion by the engagement of the second engaging portion and the joint member so that the joint member can be fitted to the joint fitting portion at different phases. If at least one of the first and second engaging portions is formed in plural with a phase difference, the attachment phase of the joint member to the knob body can be changed without changing the knob body and the joint member. it can. Therefore, the parts can be shared, and the cost can be reduced.

  FIG.1 and FIG.2 has shown the state which incorporated the drop-in type stove in the countertop 1 of a system kitchen. As shown in FIG. 3, the stove includes a box-shaped stove body 2 having an upper surface as an open surface. An outer bending flange 2 a is formed on the upper edge of the stove body 2, and the outer bending flange 2 a is placed on the edge of the stove opening 1 a with the stove body 2 dropped into the stove opening 1 a opened on the countertop 1. The stove body 2 is suspended from the countertop 1 by being hooked. And the top plate 3 covers the stove body 2 over the outer bending flange 2a from above.

  The top plate 3 is made of heat resistant glass such as ceramic glass. In addition, the rear side of the top plate 3 is formed of an aluminum extrusion molding material having a plurality of vent holes 4a for taking combustion air into the stove body 2 and a hood portion 4b for concealing the vent holes 4a. A frame 4 is attached. The top plate 3 is provided with a pair of left and right burner openings 3a for facing a pair of left and right burners 5 and 5 serving as heat sources provided in the stove body 2. The burner 5 shown in the figure is an internal flame type burner in which a large number of flame holes are provided in an annular burner body. A pair of left and right virtues 6 and 6 are placed on the top plate 3 so as to surround each burner opening 3a.

  Referring to FIG. 3, a valve unit 7, which is a heat source controller that controls gas supply to each burner 5, is disposed in the front portion of the stove body 2. The operation shaft 7a of the valve unit 7 projects onto the top plate 3 through a hole 3b formed in the top plate 3, and an operation knob 8 is attached to the upper end of the operation shaft 7a. The valve unit 7 is a known unit incorporating an ignition switch, a safety valve, and a gas amount adjusting cock, and a detailed description thereof will be omitted.

  As shown in FIGS. 3 and 4, the operation knob 8 serves as a connection part to the operation shaft 7a and a knob body 81 having an umbrella-shaped base portion 81a and a finger-hanging projection 81b on the outer surface of the base portion 81a. It is comprised with the cylindrical joint member 82. FIG. The knob body 81 is made of metal, for example, brass, stainless steel, aluminum or the like. On the other hand, the joint member 82 is formed of a synthetic resin, for example, a urea resin, an ABS resin, a PET resin, or the like.

  A shaft hole 82a on the inner periphery of the joint member 82 is formed in a D-shaped cross section in accordance with the operation shaft 7a formed in a D-shaped cross section, and the operation shaft 7a is fitted into the shaft hole 82a. The joint member 82 is connected to the operation shaft 7a while being prevented from rotating. A presser ring 83 is attached to the outer periphery of the half of the joint member 82 on the base end side (lower end side) in the axial direction. Then, a groove portion 82b reaching the shaft hole 82a is formed on the outer peripheral surface of the half portion of the joint member 82 on the proximal end side in the axial direction, and the inwardly bent portion 83a formed in the holding ring 83 is passed through the groove portion 82b. The joint member 82 is pressed against the outer peripheral surface so as to be prevented from coming off from the operation shaft 7a by a frictional force. Further, a flange portion 82c that slightly protrudes outward in the radial direction is formed at the axially intermediate portion of the joint member 82. Further, a male engagement portion (first engagement portion) 82d protruding outward in the radial direction is provided on the outer peripheral surface of the half portion on the axial front end side (upper end side) of the joint member 82 with a phase difference of 90 °. There are four of them.

  The knob main body 81 is formed with a cylindrical joint fitting portion 81c that is positioned on the back surface side of the base portion 81a and that can fit the half of the joint member 82 on the distal end side in the axial direction from the axial direction. In the joint fitting portion 81c, a female engaging portion (second engaging portion) 81d formed of a split groove into which the first engaging portion 82d can be engaged is 90 ° like the first engaging portion 82d. The four are formed with the phase difference of. Thus, in a state where each first engaging portion 82d is engaged with each second engaging portion 81d, the half of the joint member 82 on the front end side in the axial direction is fitted to the joint fitting portion 81c. The joint member 82 is connected to the main body 81 (joint fitting portion 81c) while being prevented from rotating. It is also possible to attach the joint member 82 to the knob body 81 with the phase of 90 ° changed. Even when only one first engaging portion 82d is formed or two are formed with a phase difference of 180 °, four second engaging portions 81d are formed with a phase difference of 90 °. By doing so, the joint member 82 can be attached to the knob main body 81 while changing the phase directed to 90 °.

  As described above, when the half of the joint member 82 on the front end side in the axial direction is fitted to the joint fitting portion 81c, the flange portion 82c of the joint member 82 is seated on the end edge of the joint fitting portion 81c. Here, a relatively thin claw portion 81e extends from the end edge of the joint fitting portion 81c so as to be positioned outside the seating location of the flange portion 82c. And after fitting the half part of the axial direction front end side of the joint member 82 to the joint fitting part 81c, the claw part 81e is crimped, and the axial direction base end side (lower side) of the flange part 82c of the joint member 82 The claw portion 81e is engaged with the surface facing. Thereby, the joint member 82 is prevented from coming off from the knob body 81 (joint fitting portion 81c).

  When the operation knob 8 of the present embodiment is used, the knob main body 81 that appears on the exterior is made of metal, so that the operation knob 8 feels heavy and expensive, and the operation knob 8 is arranged on the upper surface of the top plate 3. The high-class feeling of the glass top plate 3 is not impaired. When the operation knob 8 is operated, torque applied to the knob body 81 is normally transmitted to the operation shaft 7a via the joint member 82. When the torque exceeds a predetermined limit, the joint member 82 made of synthetic resin is used. The first engaging portion 82d and the shaft hole 82a are damaged and torque is not transmitted to the operation shaft 7a. Therefore, even if the knob body 81 is made of metal, excessive torque is not input to the valve unit 7, and damage to the valve unit 7 due to excessive torque is prevented.

  By the way, in the above-mentioned stove, the operation knob 8 is arranged at the front part of the upper surface of the top board 3, but as shown in FIG. 5, the model in which the operation knob 8 is arranged on the lateral side part of the upper surface of the top board 3. There is also. In this model, the valve unit 7 is arranged on the side portion in the stove body in a direction different from the stove by 90 °. Here, the connection phase of the joint member 82 with respect to the operation shaft 7a is uniquely determined. And if the attachment phase of the joint member 82 with respect to the knob | pick main body 81 is decided uniquely, the following malfunction will arise. That is, in a model in which the operation knob 8 is arranged at the front upper surface of the top plate 3, when the operation knob 8 is rotated to the fire extinguishing position, the finger hooking protrusion 81b of the knob main body 81 is adjusted along the front-rear direction. When the mounting phase of the joint member 82 with respect to the main body 81 is determined, in the model in which the operation knob 8 is arranged on the upper surface side of the top plate 3, the finger-hanging protrusion 81b is along the horizontal direction at the fire extinguishing position. It becomes difficult to rub. On the other hand, the operation knob 8 of the present embodiment can change the mounting phase of the joint member 82 with respect to the knob body 81 as described above. Therefore, in the model in which the operation knob 8 is arranged on the upper surface side of the top plate 3 with respect to the attachment phase of the joint member 82 with respect to the knob main body 81, the operation used in the model in which the operation knob 8 is arranged on the front upper surface of the top plate 3. By changing the knob 8 by 90 °, even in a model in which the operation knob 8 is arranged on the upper surface side portion of the top plate 3, the finger-hanging protrusion 81b extends along the front-rear direction in the fire extinguishing position. Thus, even if the arrangement direction of the valve unit 8 changes depending on the model, it can be dealt with only by changing the mounting phase of the joint member 82 with respect to the knob body 81, and the parts can be shared to reduce the cost.

  In the above embodiment, the first engagement portion 82d formed on the joint member 82 is a male engagement portion, and the second engagement portion 81d formed on the joint engagement portion 81c is a female engagement portion. The first engaging portion 82d is a female engaging portion formed by a groove on the outer peripheral surface of the joint member 82, and the second engaging portion 81d is a male engaging portion protruding from the inner peripheral surface of the joint fitting portion 81c. It is also possible to do.

  As mentioned above, although embodiment which applied this invention to the operation knob 8 of a drop-in type gas stove was described, the operation knob of a tabletop type stove, and also the operation knob of the electric stove using an electric heater or an electromagnetic induction coil as a heat source Similarly, the present invention can be applied. The operation knob of the present invention is particularly advantageous when it is arranged on a glass top plate, but it is needless to say that the present invention can also be applied to an operation knob arranged on the operation panel on the front surface of the stove body.

The perspective view which shows an example of the stove which comprises the operation knob of embodiment of this invention. The top view of the stove of FIG. FIG. 3 is an enlarged sectional view taken along line III-III in FIG. 2. The perspective view of the decomposition | disassembly state of the operation knob of embodiment of this invention. The top view which shows the other example of the stove which comprises the operation knob of embodiment of this invention.

Explanation of symbols

  5 ... burner (heat source), 7 ... valve unit (heat source controller), 7a ... operation shaft, 8 ... operation knob, 81 ... knob body, 81c ... joint fitting part, 81d ... second engagement part, 81e ... Claw part, 82 ... joint member, 82c ... flange part, 82d ... first engaging part.

Claims (3)

In the operation knob connected to the operation shaft of the stove heat source controller,
An operation knob for a stove, characterized in that the knob main body is made of metal, and a cylindrical joint member formed of a synthetic resin serving as a connecting portion to the operation shaft is attached to the back side of the knob main body.   On the back surface of the knob main body, a joint fitting portion that can fit the joint member from the axial direction is formed, and a flange portion adjacent to a portion fitted to the joint fitting portion is formed on the joint member, The joint member is prevented from coming off from the joint fitting portion by extending the claw portion to the edge of the joint fitting portion and caulking the claw portion to engage the flange portion. 1. Operation knob for stove according to 1.   A female or male second engaging portion that engages with a male or female first engaging portion formed on the outer peripheral surface of the joint member is formed on the joint fitting portion, and the first and first The joint member is prevented from rotating with respect to the joint fitting portion by the engagement of the two engaging portions, and the joint member can be fitted to the joint fitting portion at different phases. The stove operation knob according to claim 2, wherein a plurality of at least one of the first and second engaging portions is formed with a phase difference.

Images