JP6959637B2 - Fuel supply device and gas stove - Google Patents

Description

The present invention relates to a fuel supply device and a gas stove.

The gas stove is equipped with a fuel supply device that supplies gas to the stove burner. The fuel supply device disclosed in Patent Document 1 includes a valve operating rotating body that rotates together with an operating tool (operating knob) to advance and retreat the needle valve. Further, the fuel supply device has a connecting member that connects the operating tool and the valve operating rotating body and rotates them integrally. A cam portion is formed in a part of the connecting member, and when the operating tool is pushed in, the cam portion converts the pushing force into rotational power, so that the cam portion advances and retreats the needle valve to the ignition position. In such a case, the valve operating rotating body is provided with a cam groove that is spirally inclined in the pushing direction, and a pin extending downward from the needle valve is inserted into the cam groove to push the operating tool to the ignition position. At that time, the needle valve is guided to a predetermined ignition position by rotating the valve operating rotating body to advance and retreat the needle valve.

JP-A-2017-3164

However, in the fuel device of Patent Document 1, when the operating tool is rotating at the time of the pushing operation and is in a position of high heat or low heat from a predetermined ignition position, or when the operating tool is pushed all the way out, the force is applied. As a result, the position of the needle valve may vary slightly. That is, the amount of gas at the time of ignition of the burner may vary.

An object of the present invention is to provide a fuel supply device and a gas stove capable of preventing a variation in the amount of gas when the burner is ignited.

The fuel supply device according to claim 1 is provided with an operation knob that can be pushed in and can rotate freely in the pushing direction, and is provided on the side of the operating knob in the pushing direction so as not to move in the pushing direction. With respect to the pushing direction of the operation knob, the cam member that converts the pushing force into the rotational force in the pushing direction and the end of the needle valve that adjusts the fuel supply amount on the front side in the direction opposite to the pushing direction side. It has a pin that protrudes vertically and at least downward, and the pin is inserted into a cam groove. It is composed of a non-inclined portion parallel to the rotation direction, rotates in conjunction with the rotation of the cam member, and responds to the pin moving forward and backward along the cam groove with the rotation of the cam member. A fuel adjusting unit for adjusting the fuel supply amount and an ignition guide for rotating the cam member toward the ignition position and advancing and retreating the needle valve when the operation knob is pushed in. The pin is located at the non-tilted portion before and after the completion of pushing the operation knob.

The fuel supply device according to claim 2 is characterized in that, in addition to the configuration according to claim 1, the non-inclined portion is located at a central portion of the cam groove.

The fuel supply device according to claim 3 is characterized in that, in addition to the configuration according to claim 1 or 2, the non-inclined portion is located at at least one of both ends of the cam groove.

The gas stove according to claim 4 is characterized by including the fuel supply device according to any one of claims 1 to 3.

According to the fuel supply device according to claim 1, the pin is located in a straight portion which is a region where the needle valve does not move before and after the completion of pushing the operation knob. Therefore, to absorb a positional deviation of the indentation at the completion of a needle valve of the operating knob, the fuel supply apparatus, it is possible to ignite at a predetermined heating power.

According to the fuel supply device according to claim 2, in addition to the effect of the invention according to claim 1, the thermal power at the completion of pushing the operation knob is usually medium heat. Therefore, to absorb a positional deviation of the indentation at the completion of a needle valve of the operating knob, the fuel supply apparatus, it is possible to ignition over medium heat.

According to the fuel supply device according to claim 3, in addition to the effect of the invention according to claim 1 or 2, the fuel supply device absorbs the misalignment of the needle valve even in the case of high heat or low heat, and the fuel supply device is in high heat or low heat. Ignition on low heat is possible.

The gas stove according to claim 4 has the effect of the fuel supply device according to any one of claims 1 to 3.

In the present invention, the matters specifying the invention according to claims 1 to 3 may be arbitrarily combined.

It is a perspective view of the gas stove 1. It is a perspective view of the fuel supply device 20. It is a figure of the fuel supply device 20 when the operation knob 14 is in an operation position. It is sectional drawing of the fuel supply device 20 in the cross-sectional line AG. It is a figure which shows the case where the operation knob 14 is in a fire extinguishing position. It is a top view of the thermal power adjustment cam 26. It is a back view of the thermal power adjustment cam 26. It is a front view of the thermal power adjustment cam 26. It is a side view of the thermal power adjustment cam 26. It is a figure for demonstrating the ignition guide 40 and the first inclined cam part 37A. It is a figure for demonstrating the ignition guide 40. It is a perspective view of the connecting member 25. It is a figure for demonstrating the cam part 36.

Hereinafter, embodiments of the present invention will be described. Unless otherwise specified, the structure of the device described below is not intended to be limited thereto, but is merely an example of explanation. The drawings are used to illustrate the technical features that can be adopted by the present invention. In the following description, the left and right, front and back, and top and bottom indicated by arrows in the figure are used.

The gas stove 1 will be described with reference to FIG. The gas stove 1 is a built-in stove. The gas stove 1 includes a housing 2 and a top plate 3. The upper part of the housing 2 is open, and the top plate 3 is installed in the opening portion. In the top plate 3, a right burner 4 is provided on the front right side, a left burner 5 is provided on the front left side, and a back burner 6 is provided on the back side of the center. An exhaust port 7 of a grill device (not shown) installed in the housing 2 is provided at the rear portion of the top plate 3.

A grill door 8 is provided at substantially the center of the front surface of the gas stove 1. The grill door 8 opens and closes a front opening portion of a grill storage (not shown) provided in the grill device. In the area on the right side of the grill door 8, two operation knobs 11 and 12 having a circular front view are provided side by side in the horizontal direction. In the area on the left side of the grill door 8, two operation knobs 13 and 14 having the same shape are provided side by side at the same height position as the operation knobs 11 and 12. Each of the operation knobs 11 to 14 is operated to ignite, extinguish, and adjust the fire power of the right burner 4, the grill burner in the grill (not shown), the back burner 6, and the left burner 5. The operation knobs 11 to 14 are attached to the front ends of the fuel supply device 20 (see FIG. 2), respectively.

The fuel supply device 20 will be described with reference to FIG. The gas stove 1 includes a right burner 4, a left burner 5, a back burner 6, and four fuel supply devices for supplying gas to the grill device. Among them, the fuel supply device 20 for supplying gas to the right burner 4, the left burner 5, and the back burner 6 is a device having the same configuration provided with a known push-push mechanism 24. Further, the fuel supply device (not shown) that supplies gas to the grill device has a push-push mechanism similar to that of the fuel supply device 20, but since the gas flow rate is adjusted by a solenoid valve, the flow rate adjusting unit (not shown). ) Is provided separately. Hereinafter, the fuel supply device 20 for supplying gas to the left burner 5 will be described as an example, and the description of the fuel supply device for supplying gas to the right burner 4, the back burner 6, and the grill device will be omitted. Since the fuel supply device that supplies gas to the right burner 4 and the fuel supply device that supplies gas to the back burner 6 have the same configuration as the fuel supply device 20, they are designated by the same reference numerals for convenience. It is called a device 20.

As shown in FIG. 2, the fuel supply device 20 is a device that ignites and extinguishes the left burner 5 and adjusts the amount of gas supplied to the left burner 5 by pushing and rotating the operation knob 14. The pushing operation is an operation of pressing the front surface of the operation knob 14 backward and pushing it to the back side of the front surface of the gas stove 1. The rotation operation is an operation of gripping the side surface of the operation knob 14 and rotating around an axis (axis center AX) in the front-rear direction. The fuel supply device 20 includes an operation unit 21, a gas flow path unit 22, a thermal power adjustment cam 26, a flow rate adjustment unit 31, and the like.

The operation unit 21 includes an operation knob 14, a push / push mechanism 24, and a connecting member 25. The connecting member 25 will be described later. The operation knob 14 is formed in a substantially columnar shape. The operation knob 14 is pushed and moved toward the rear of the gas stove 1 to move to each position of the standby position, the pushing position, and the operating position. The standby position is a position where the tip surface of the operation knob 14 is substantially flush with the front surface of the gas stove 1. In the standby position, the front end surface of the operation knob 14 may be located slightly behind the front surface of the gas stove 1 or slightly in front of it. In the fuel supply device 20 shown in FIG. 2, the operation knob 14 is located at the standby position. The pushing position is a position where the tip surface of the operation knob 14 is pushed rearward from the front surface of the gas stove 1. The operation knob 14 is located at the push-in position behind the standby position. The operation position is a position where the tip surface of the operation knob 14 projects with respect to the front surface of the gas stove 1. The operation knob 14 is located in front of the standby position at the operation position. When in the operating position, the operating knob 14 is rotatable (rotatable) about the axial center AX along the front-rear direction.

In the push / push mechanism 24, the operation knob 14 is connected to the front end portion so as to be able to move forward and backward and to be rotatable around the axis AX. The push / push mechanism 24 positions the operation knob 14 at each position of the standby position, the push position, and the operation position, and maintains the main valve (not shown) described later in the open state or the closed state according to each position. Inside the push / push mechanism 24, there is a slider (not shown) that moves in the front-rear direction according to the pushing operation of the operation knob 14, a spring that biases the slider forward, and a valve drive that drives the main valve. A section (not shown) is provided. The slider is provided with a known cam mechanism (not shown). Each time the operation knob 14 is pushed in, the slider repeats an operation of moving the operation knob 14 from the standby position to the operation position via the push position and an operation of moving the operation knob 14 from the operation position through the push position to the standby position. The valve drive unit opens the main valve in conjunction with the operation of the operation knob 14 moving from the standby position to the operation position and maintains the open state, and the operation knob 14 moves from the operation position to the standby position. In conjunction with the operation, the main valve is closed and the operation of maintaining the closed state is performed. The above description of the push-push mechanism 24 is a brief description of an example of the existing push-push mechanism 24, and another push-push mechanism 24 may be applied.

The gas flow path portion 22 is connected to the rear side of the push / push mechanism 24. A first gas passage (not shown) is formed inside the gas flow path portion 22. The first gas passage circulates the gas supplied from the gas supply pipe (not shown) connected to the introduction port 23 that opens at the bottom to the flow rate adjusting unit 31. A safety valve (not shown) and a main valve (not shown) are provided in the first gas passage. The safety valve is an electromagnetically operated valve that is elastically urged to close the first gas passage. The main valve is a valve that opens and closes the first gas passage according to the pushing operation of the operation knob 14. Since both the main valve and the safety valve are well known, detailed description of the operation will be omitted.

The flow rate adjusting unit 31 is provided above the push / push mechanism 24 and the gas flow rate unit 22. A second gas passage (not shown) is formed inside the flow rate adjusting unit 31. The second gas passage circulates the gas supplied from the gas passage portion 22 and supplies the gas to the left burner 5 via a gas supply pipe (not shown) connected to the outlet 32 that opens at the top. A hole 30 communicating with the second gas passage is formed at the front end of the flow rate adjusting portion 31, and the needle valve 28 is inserted. The front end side of the needle valve 28 is exposed to the outside from the hole 30, and the rear end side is arranged so as to be movable in the front-rear direction in the second gas passage. A pin 29 extending in the vertical direction is provided at the front end of the needle valve 28. The lower end of the pin 29 engages with the cam groove 27 (described later) of the thermal power adjusting cam 26.

The thermal power adjusting cam 26 is formed in a substantially semi-cylindrical shape, and is rotatably provided around the axis AX so as to cover the upper part on the front end side of the push / push mechanism 24. The thermal power adjusting cam 26 is restricted from moving in the front-rear direction. A cam groove 27 is provided on the outer peripheral portion of the thermal power adjusting cam 26. The cam groove 27 is formed in a substantially spiral shape centered on the axis AX. The lower end of the pin 29 provided on the needle valve 28 engages with the cam groove 27. When the thermal power adjusting cam 26 rotates, the cam groove 27 guides the pin 29 and moves the needle valve 28 in the front-rear direction. The cam groove 27 will be described later.

The thermal power adjusting cam 26 includes an extension portion 37 extending forward, and has a side tooth portion 35 projecting inward at the front end portion of the extension portion 37. The stretched portion 37 will be further described later. As shown in FIGS. 3 and 4, the side tooth portion 35 meshes with the side tooth portion 38 (described later) of the connecting member 25 when the operation knob 14 is in the operating position, and the thermal power adjusting cam is provided via the connecting member 25. The 26 is rotated around the axis AX together with the operation knob 14.

The connecting member 25 of the operation unit 21 extends forward from the slider of the push / push mechanism 24 and engages with a shaft body (not shown) centered on the axis AX. The connecting member 25 is integrally fixed with the operation knob 14 at the front end portion, and is provided so as to be rotatable around the axis AX together with the operation knob 14. The connecting member 25 has a side tooth portion 38 that meshes with the side tooth portion 35 of the thermal power adjusting cam 26 on the outer peripheral surface of the rear end portion. When the operation knob 14 is in the operation position, as shown in FIGS. 3 and 4, the side tooth portion 38 of the connecting member 25 meshes with the side tooth portion 35 of the thermal power adjustment cam 26, and the operation knob 14 and the thermal power adjustment cam 26 To concatenate. When the operation knob 14 is not in the operation position, the side tooth portion 35 of the thermal power adjustment cam 26 is connected to the connecting member 25 as shown in FIG. 5 (in the example of FIG. 5 when the operation knob 14 is in the fire extinguishing position). It is located in front of the side tooth portion 38 and does not mesh with each other, and the connection state of the operation knob 14 and the thermal power adjusting cam 26 is released. More specifically, when the operation knob 14 is in the fire extinguishing position, for example, the side tooth portion 38 is located on the rear side of the side tooth portion 35. On the other hand, as the operation knob 14 protrudes to the operation position, the side tooth portion 38 moves in the protruding direction of the operation knob 14 in conjunction with the operation knob 14 and enters between the side tooth portions 35. Then, when the operation knob 14 protrudes to the operation position, the side tooth portion 38 meshes with the side tooth portion 35. Therefore, since the rotational power generated during the pushing operation is not transmitted to the operation knob 14, it is possible to prevent the operation knob 14 from rotating and giving a sense of discomfort to the user. Reference numeral 40 in FIG. 5 is a tubular ignition guide for forcibly guiding the needle valve 28 to a second predetermined position (described later). The ignition guide 40 is interlocked with the operation knob in the front-rear direction and is non-rotating. The ignition guide 40 will be described later.

Next, ignition and extinguishing and adjustment of thermal power by rotating the operation knob 14 will be described. When the left burner 5 is extinguished, the operation knob 14 is in the standby position. In the process in which the user pushes the operation knob 14 and the operation knob 14 moves to the pushed position, the safety valve and the main valve are opened, and the left burner 5 is ignited by the igniter (not shown). When the user releases the operation knob 14, the operation knob 14 moves to the operation position by the urging of the spring. The safety valve and main valve are kept open. The operation knob 14 and the thermal power adjusting cam 26 are connected by the connecting member 25.

When the operation knob 14 is rotated while the operation knob 14 is in the operation position, the thermal power adjusting cam 26 rotates around the axis AX together with the operation knob 14. When the thermal power adjusting cam 26 rotates, the pin 29 of the needle valve 28 is guided by the cam groove 27 and moves in the front-rear direction. As a result, the needle valve 28 moves in the front-rear direction, so that the flow rate of the gas flowing through the second gas passage is adjusted according to the position of the needle valve 28, and the thermal power of the left burner 5 is changed.

The safety valve and the main valve are closed in the process in which the user pushes the operation knob 14 and the operation knob 14 moves to the pushed position. The left burner 5 extinguishes the fire. When the user releases the operation knob 14, the operation knob 14 moves to the standby position due to the urging of the spring. The safety valve and main valve are kept closed.

As described above, in the fuel supply device 20, the thermal power adjusting cam 26 moves the needle valve 28 in accordance with the rotation operation of the operation knob 14, so that the flow rate of the gas flowing through the second gas passage of the flow rate adjusting unit 31 is increased. Adjust steplessly. That is, the thermal power of the left burner 5 changes linearly according to the amount of rotation of the operation knob 14. The same applies to the operation knobs 11 and 13 corresponding to the right burner 4 and the back burner 6, respectively. The gas stove 1 is provided with a thermal power display function on the panel devices 9A and 9B provided on the front surface in order to display the thermal power according to the amount of rotation of the operation knobs 11, 13 and 14.

As shown in FIG. 1, the gas stove 1 is provided with a right burner 4 and a panel device 9A for displaying the thermal power of the grill device in the area on the right side of the grill door 8, and a left burner 5 in the area on the left side of the grill door 8. A panel device 9B for displaying the thermal power of the back burner 6 is provided.

Here, the cam groove 27 will be described with reference to FIGS. 6 and 7. As shown in FIGS. 6 and 7, the cam groove 27 is formed with straight portions 27A and 27C perpendicular to the axis AX and parallel to the left-right direction at both ends. Further, as shown in FIG. 6, the cam groove 27 is formed with a straight portion 27B perpendicular to the axial center AX and parallel to the left-right direction at the central portion (uppermost portion). An inclined portion 27D and an inclined portion 27E are formed between the straight portion 27A and the straight portion 27B, and between the straight portion 27B and the straight portion 27C, respectively. By forming the straight portion 27B in the central portion of the cam groove 27 in this way, a region in which the needle valve 28 does not move can be formed, and an error at the completion of pushing the operation knob 14 can be absorbed. It is possible to prevent variations. Further, by forming the straight portions 27A and 27C at both ends of the cam groove 27, it is possible to absorb the error when the operation knob 14 is rotated to the high heat position or the low heat position, so that it can be made suitable for high heat or low heat. can. It is sufficient to have at least one of the straight portions 27A and 27C at both ends.

The stretched portion 37 will be described with reference to FIGS. 5 to 9. As shown in FIG. 6, the stretched portion 37 has a tapered first inclined cam portion 37A that tapers forward on both sides of a substantially central portion. The extension portion 37 has a tongue piece 37B extending forward from the front end portion of the first inclined cam portion 37A. In this embodiment, the tongue piece 37B may or may not be present. As shown in FIG. 5, the tongue piece 37B is inserted in the space between the connecting member 25 and the ignition guide 40. As shown in FIG. 6, the stretched portion 37 has a collar 37C that stretches in the front-rear direction on both sides of the rear portion of the stretched portion 37 and protrudes in one of the left-right directions, and a locking portion in the center of the rear portion of the stretched portion 37. It has 37D. The collar 37C is for sliding and locking the cam portion 36 (described later) into the locking groove 36B (described later) of the cam portion 36 when the cam portion 36 (described later) is attached to the thermal power adjusting cam 26. As shown in FIG. 9, the locking portion 37D is formed so as to incline in a direction away from the main body of the extending portion 37 toward the rear. Therefore, by sliding the collar 37C into the locking groove 36B of the cam portion 36 to lock the collar 37C and further locking the locking portion 37D into the locking hole 36C (described later) of the cam portion 36, the cam portion 36 can be moved. It can be attached to the thermal power adjustment cam 26. That is, the cam portion 36 and the thermal power adjusting cam 26 are not integrally formed, and the cam portion 36 is removable from the thermal power adjusting cam 26.

As shown in FIG. 7, the stretched portion 37 has three side tooth portions 35 on the back surface (the surface facing the connecting member 25) of the tongue piece 37B. The reason for having the three side tooth portions 35 is to prevent the side tooth portions 35 from being damaged when the operation knob 14 is rotated with a force more than necessary. Therefore, depending on the strength of the material forming the stretched portion 37, the number of the side tooth portions 35 may be one or two. Of course, it may have four or more side teeth 35 as long as it can be formed at the front end of the tongue piece 37B.

Further, among the three side tooth portions 35, the length of the middle side tooth portion 35 in the anteroposterior direction is formed to be slightly longer than that of the other side tooth portions 35. In this process, in the process of pushing the operation knob 14 and projecting the operation knob 14 to the operation position, the front end portion of the side tooth portion 35 of the tongue piece 37B and the rear end portion of the side tooth portion 38 of the connecting member 25 collide with each other. This is to stabilize the state and prevent the operation knob 14 from protruding to the operation position. By lengthening a part of the side tooth portion 35 of the tongue piece 37B in the front-rear direction, the front end portion of the side tooth portion 35 of the tongue piece 37B and the rear end portion of the side tooth portion 38 of the connecting member 25 collide with each other. Even if it fits, it can be made slippery to either the left or right side, and the operation knob 14 can be reliably projected to the operation position. That is, in the present embodiment, the length of the middle side tooth portion 35 among the three side tooth portions 35 in the anteroposterior direction is lengthened, but the length of any of the left and right side tooth portions 35 in the anteroposterior direction is lengthened. You may. Of the three side tooth portions 35, the length of the two side tooth portions 35 in the anteroposterior direction may be increased. However, from the viewpoint of slipperiness when the front end portion of the side tooth portion 35 of the tongue piece 37B and the rear end portion of the side tooth portion 38 of the connecting member 25 collide with each other, the two side tooth portions 35 are in the front-rear direction. It is preferable to increase the length of one side tooth portion 35 in the anteroposterior direction rather than increasing the length.

As shown in FIG. 7, each side tooth portion 38 is formed in a tapered shape that tapers toward the rear. As shown in 86, the rear portion of each side tooth portion 38 is formed in a tapered shape that tapers downward (as it approaches the outer peripheral portion of the connecting member 25), and as shown in FIG. 9, it faces rearward. It is formed so as to be inclined so as to approach the back surface of the tongue piece body.

The ignition guide 40 and the first inclined cam portion 37A will be further described with reference to FIGS. 10 and 11. The ignition guide 40 has contact portions 40A at the left and right rear ends. As shown in FIG. 10, the contact portion 40A contacts the first inclined cam portion 37A when the operation knob 14 is pushed in while being rotated in the low heat direction or the high heat direction, and the first inclined cam portion 40A is brought into contact with the first inclined cam portion 37A. The unit 37A converts the pushing force into a rotational force around the axis AX. As a result, the needle valve 28 is forcibly moved to the first predetermined position. The ignition guide 40 has a protrusion 40B having the same length as the length of the ignition guide 40 in the front-rear direction at the uppermost portion formed in a substantially plate shape. Since the protrusion 40B comes into contact with the second inclined cam portion 36A as described later, it may be shorter as long as sufficient strength can be secured. As described above, the ignition guide 40 is formed in a cylindrical shape, and has an arcuate free insertion hole 40C as shown in FIG.

The side tooth portion 38 of the connecting member 25 will be described with reference to FIG. As shown in FIG. 12, a plurality of side tooth portions 38 are formed on the rear portion of the connecting member 25 along the outer periphery. Each side tooth portion 38 is formed in a tapered shape that tapers toward the front. Further, the front portion of each side tooth portion 38 is formed in a tapered shape as it is separated from the axial center AX, and is formed so as to be inclined so as to approach the axial center AX toward the front. Instead of changing the length of a part of the side teeth 35 of the tongue piece 37B, even if the side teeth 38 having a long anterior-posterior length and the side teeth 38 having a short anterior-posterior length are alternately arranged. good. By doing so, when the front end portion of the side tooth portion 35 of the tongue piece 37B and the rear end portion of the side tooth portion 38 of the connecting member 25 collide with each other, it can be slippery to either the left or right side. Therefore, the operation knob 14 can be reliably projected to the operation position.

The cam portion 36 will be described with reference to FIG. The cam portion 36 shown in FIG. 13 is a view in a state of being slightly tilted in the lower left direction. A second inclined cam portion 36A is provided on the back surface of the cam portion 36. The second inclined cam portion 36A is formed of a cam portion inclined in the lower right front direction and a cam portion inclined in the lower left front direction. When the operation knob 14 is pushed, the second inclined cam portion 36A comes into contact with the protrusion 40B of the ignition guide 40, and converts the pushing force into rotational power around the axis AX. As a result, the needle valve 28 is forcibly moved to the second predetermined position. The second predetermined position is preferably the medium heat position. However, in the back burner 6, the gas flow rate is set smaller than that of the right burner 4 and the left burner 5 installed on the front side. Therefore, in order to maintain the stability of ignition, the second predetermined position is preferably a position corresponding to high heat. Therefore, the protrusion 40B of the ignition guide 40 of the back burner 6 is arranged on the right side of the uppermost portion when viewed forward. The cam portion 36 has a locking groove 36B on the left and right lower sides of the rear portion and a locking hole 36C in the center of the rear portion. As described above, the locking groove 36B and the locking hole 36C are for mounting the cam portion 36 on the thermal power adjusting cam 26.

As described above, in the fuel supply device 20 of the present embodiment, when the operation knob 14 is pushed in, the first inclined cam portion 37A first abuts on the contact portion 40A of the ignition guide 40, and the first inclined cam portion 37A converts the pushing force into rotational power around the axis AX. As a result, the needle valve 28 moves to the first predetermined position. The first predetermined position is a position between high heat and medium heat or a position between low heat and medium heat. Then, the second inclined cam portion 36A comes into contact with the protruding portion 40B of the ignition guide 40, and the second inclined cam portion 36A converts the pushing force into rotational power around the axis AX. As a result, the needle valve 28 moves to the second predetermined position. That is, the fuel supply device 20 of the present embodiment moves the needle valve 28 to the second predetermined position (target position) in two steps. In order to move the needle valve 28 to the second predetermined position only with the ignition guide 40 and the first inclined cam portion 37A as in the conventional case, it is necessary to increase the size of the ignition guide 40 and the first inclined cam portion 37A. was there. In this case, the left and right lengths (widths) of the fuel supply devices 20 become large, and it becomes difficult to arrange the fuel supply devices 20 side by side. On the other hand, in the present embodiment, since the needle valve is moved to the second predetermined position in two steps, the first inclined cam portion 37A and the ignition guide 40 can be miniaturized.

According to the above embodiment, the fuel supply device 20 includes an operation knob 14, a cam portion 36, a thermal power adjusting cam 26, and an ignition guide 40. The cam portion 36 is provided on the push-in direction side of the operation knob 14 so as not to move in the push-in direction, and converts the push-in force into rotational power in the push-in direction. The thermal power adjusting cam 26 has a pin 29 projecting at least downward at the front end of the needle valve 28 for adjusting the fuel supply amount, and the pin 29 is inserted into the cam groove 27. The cam groove 27 is composed of inclined portions 27D and 27E and straight portions 27A, 27B and 27C. The thermal power adjusting cam 26 rotates in conjunction with the rotation of the cam portion 36, and the fuel supply amount is adjusted according to the movement of the pin 29 along the cam groove 27 with the rotation of the cam portion 36. .. When the operation knob 14 is pushed in, the ignition guide 40 rotates the cam portion 36 toward the ignition position to advance and retreat the needle valve 28. The pin 29 is located in the straight portion 27B, which is a region where the needle valve 28 does not move, before and after the completion of pushing the operation knob 14. As a result, the fuel supply device 20 can be ignited with a predetermined thermal power by absorbing the misalignment of the needle valve 28 when the operation knob 14 is completely pushed.

In the above description, the gas stove 1 is an example of a “gas stove”. The operation knob 14 is an example of the “operation knob”. The fuel supply device 20 is an example of a “fuel supply device”. The cam portion 36 is an example of a “cam member”. The thermal power adjustment cam 26 is an example of a “fuel adjustment unit”. The cam groove 27 is an example of a “cam groove”. The straight portions 27A, 27B, and 27C are examples of "non-inclined portions". The inclined portions 27D and 27E are examples of "inclined portions". The needle valve 28 is an example of a “needle valve”. The pin 29 is an example of a “pin”. The ignition guide 40 is an example of an “ignition guide”.

1 Gas stove 14 Operation knob 20 Fuel supply device 26 Thermal power adjustment cam 27 Cam groove 27A Straight part 27B Straight part 27C Straight part 27D Inclined part 27E Inclined part 28 Needle valve 29 Pin 36 Cam part 40 Ignition guide

Claims (4)

An operation knob that can be pushed in and can rotate freely in the pushing direction,
A cam member provided on the push-in direction side of the operation knob so as not to move in the push-in direction and converts the push force into rotational power in the push-in direction.
At the end of the needle valve that adjusts the fuel supply amount on the front side in the direction opposite to the pushing direction side, the operation knob has a pin that projects perpendicularly and at least downward to the pushing direction, and the pin is a cam. The cam groove is inserted into the groove, and the cam groove is composed of an inclined portion that is spirally inclined in the pushing direction of the operating knob and a non-inclined portion that is parallel to the rotating direction of the operating knob. A fuel adjusting unit that rotates in conjunction with the rotation of the cam member and adjusts the fuel supply amount according to the movement of the pin along the cam groove as the cam member rotates.
An ignition guide that rotates the cam member toward the ignition position and advances and retreats the needle valve when the operation knob is pushed in.
With
A fuel supply device characterized in that the pin is located at the non-tilted portion before and after the completion of pushing the operation knob. The fuel supply device according to claim 1, wherein the non-inclined portion is located at a central portion of the cam groove. The fuel supply device according to claim 1 or 2, wherein the non-inclined portion is located at at least one of both ends of the cam groove. A gas stove comprising the fuel supply device according to any one of claims 1 to 3.

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