JPS6334366B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a timer for kerosene stoves, and more particularly to an improved timer for kerosene stoves that can easily perform automatic timer ignition and normal ignition control of kerosene stoves whose combustion is electrically controlled. It is.

2. Description of the Related Art Oil stoves are well known in which combustion is controlled electrically by providing a forced supply/exhaust mechanism, an oil volume regulator, etc., and it is possible to provide a highly efficient and highly safe stove.

In this type of kerosene stove, preheating is usually performed to ensure reliable ignition, and for this purpose, current is supplied to an electric heater or the like for a predetermined period of time at the start of operation. Therefore, the preheating operation is required to ignite the stove, and the ignition switch mechanism must be provided with such a timer or other preheating mechanism. Furthermore, in order to perform automatic ignition when waking up, it is desired to automatically perform the ignition action after a predetermined period of time has elapsed, and various timers for kerosene stoves have been proposed for this purpose.

However, with conventional timers for kerosene stoves, it is difficult to simultaneously control with high precision the relatively long time until operation starts and the short time-up time required for preheating. In the past, there were disadvantages such as having to provide a timer switch and a heating switch separately, or having to manually ignite the light, making it difficult to use, and also causing the timer itself to become large.

The present invention was made in view of the above-mentioned conventional problems, and its purpose is to enable two types of switches, a timer switch and an ignition switch, to be operated by rotating a single operating shaft, thereby improving operability. Our objective is to provide an excellent small timer for kerosene stoves.

In order to achieve the above object, the kerosene stove timer according to the present invention includes an operating shaft that is rotatably supported on a mechanism receiving plate, is set to rotate by the user, and controls the operation start function of the stove, a motor, a motor mechanism that is attached to the mechanism receiving plate and outputs low-speed or high-speed driving force, and includes a gear train having a low-speed wheel for timer counting and a high-speed wheel for counting preheating time; and a low-speed or high-speed driving force of the motor mechanism. A drive shaft is provided on the operating shaft in order to transmit driving force to the operating shaft, and is engaged with either the low-speed vehicle or the high-speed vehicle by axial movement of the operating shaft, thereby reducing the speed of the operating shaft to low or high speed. A speed switching gear for switching, a set cam provided on the mechanism receiving plate and having a cam groove, and a set cam provided on the mechanism receiving plate side of the operating shaft and aligned with the set cam in order to switch the speed switching gear. A timer set disk that controls axial movement, and a timer cam that is rotatably coupled to the operating shaft, and that controls opening and closing of the timer switch along with rotation of the operating shaft, and a timer cam that is rotatably coupled to the operating shaft. and an ignition cam that controls the opening and closing of the ignition switch as well as the rotation of the operating shaft.

In the kerosene stove timer, the motor mechanism is driven when the ignition switch is closed, and the oil amount and blower motor are driven when the timer switch is closed.

Therefore, according to the present invention, the ignition heater is activated when both the ignition switch and the timer switch are closed, and a long time count corresponding to the rotation set amount is performed by rotating the operating shaft at a low speed. , the short time required for preheating is performed by rotating the operating shaft at high speed, and the rotation of a single operating shaft performs a series of automatic ignitions, including counting the timer time of the stove, preheating, ignition, and operation. Control becomes possible.

Preferred embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows an exploded perspective view of a preferred embodiment of the timer according to the present invention, in which a rotating operating shaft 14 is located between a mechanism receiving plate 10 fixed to the stove body and a lower plate 12. The operating shaft 14 is freely supported, and the user can control the desired stove operation by controlling the rotation of the operating shaft 14. In the embodiment, air blowing, oil amount control, and ignition control are controlled by this operating shaft. This is done by 14 rotations.

An upper plate 16 is fixed to the mechanism receiving plate 10, and a motor mechanism is attached to the upper plate 16 and the receiving plate 10 to drive the operating shaft 14 at a predetermined low or high speed. The motor mechanism includes a motor 2 such as a synchronous motor built into a motor case 20.
2 and a gear train, a worm 24 protruding from the motor case 20 into the mechanism receiving plate 10 is provided in the middle of the gear train, and the motor mechanism further includes a reduction gear train 26 that meshes with the worm 24. Re,
The reduction wheel train 26 includes a worm wheel 28 that meshes with the worm 24, a low speed wheel 30 used for a timer function (described later), and a high speed wheel 32 used for an ignition function (described later). and the middle plate 34.

In order to transmit the low-speed or high-speed driving force of the motor mechanism described above to the operating shaft 14, a switching gear 36 is fixed to the operating shaft 14, and when the operating shaft 14 slides in the axial direction, the switching gear 36 meshes with either the low-speed vehicle 30 or the high-speed vehicle 32, and the speed of the operating shaft 14 can be switched to either one.

Further, a timer set disk 38 is fixed to the operating shaft 14 on the side of the mechanism receiving plate 10, and when this timer setting disk 38 engages with a set cam 40 provided on the mechanism receiving plate 10, the operating shaft When the user rotates the operating shaft 14, its axial movement is controlled; that is, in the embodiment, when the user rotates the operating shaft 14, the shaft 14 moves to the left in FIG. At later time-up, the timer set disk 38 and set cam 40
are aligned, and the shaft 14 moves to the right. In order to move the operating shaft 14 in the axial direction, the operating shaft 1
A shaft spring 42 is provided between the shaft 14 and the lower plate 12, which causes the shaft 14 to move in the right direction.

A timer cam 44 and an ignition cam 46 are engaged with the shaft 14 in order to perform the desired timer action and ignition action by the rotation of the operating shaft 14. Performs switch opening/closing action.

That is, the timer control lever 48 is engaged with the timer cam 44, and the timer control lever 48 is engaged with the timer cam 44.
As a result, the timer switch 50 fixed to the upper plate 16 is controlled on and off, thereby controlling the start of operation of the stove in accordance with the initial setting amount of the operating shaft 14. In the embodiment, this timer control lever 48 also controls the fuel supply valve of the stove and requires a relatively large operating force, so the friction loss between the timer cam 44 and the timer control lever 48 due to this operating force is reduced. In order to do this, the set state of the timer control lever 48 is held by a holding lever 52, and the holding of the timer control lever 48 is released when the timer is up. Holding lever 52
In the embodiment, this operation is performed by moving the timer cam 44 in the axial direction, and the holding lever 52 is biased in one direction by a set lever spring 54.

On the other hand, the ignition cam 46 turns on and off an ignition switch 58 fixed to the top plate 16 via a first switch lever 56, thereby controlling the ignition for a predetermined period of time when the stove starts operating.

In the embodiment, the ignition switch 5 is further provided on the main switch of the timer, in the upper plate 16 in the figure.
A main control cam 62 is engaged with the operation shaft 14 in order to perform on/off control of a main switch 60 which is fixed to overlap with the main switch 8, and the main switch 60 is controlled via a second switch lever 64. .

Although the timer of this embodiment has the above-described configuration, the electrical control circuit of the kerosene stove using this timer will be further explained based on FIG. 2.

In FIG. 2, the power source is controlled on and off by a main switch 60, and current is supplied to the motor 22 and timer lamp 66 via an ignition switch 58. A blower motor 68 and an oil amount control solenoid 7 are used to operate the kerosene stove.
Current is supplied to the 0 and operation lamps 72 via the main switch 60 and the timer switch 50. Further, a step-down current is supplied from a transformer 76 to an ignition heater 74 for igniting the kerosene stove at the start of operation, and the current to the transformer 76 is supplied via both an ignition switch 58 and a timer switch 50. has been done. Therefore,
By controlling each switch 60, 58, 50 by the timer of this embodiment described above, it is possible to reliably perform the desired automatic timer ignition and ignition action.

FIG. 3 shows a timer scale plate in this embodiment, and it is possible to set a 12-hour timer, and the desired timer time can be set by rotating the operating shaft 14 counterclockwise in FIG. 3. Ignition and operation are performed at the time of time-up, and the desired ignition action can be performed by manually rotating the operating shaft from the "off" position clockwise in FIG. 3 to the "ignition" position.

In the present invention, in the case of the automatic timer ignition, the operation shaft 14 rotates at a low speed from the set timer time until the ignition, so that the long timer time, for example, 12 hours, can be kept within one rotation of the shaft, and the ignition During the period when ignition is completed and normal operation is started, the operating shaft 14 can be rotated at high speed to ensure a highly accurate ignition time. For example, in Fig. 3, the time from "ignition" to "operation" is about 6 minutes. High-speed cam rotation can be performed in a short period of time, eliminating wasted ignition heater time.

FIG. 4 shows a low-speed and high-speed switching gear train of the motor mechanism, and the worm 24 is connected to the worm wheel 28.
The worm wheel 28 meshes with the high-speed gear 78, and the rotation of the high-speed gear 78 is transmitted to the high-speed gear 32. A slip spring 80 is provided between the high speed gear 78 and the high speed wheel 32, and both slip and rotate when the operating shaft 14 is set and rotated by the user. And worm car 2
8 meshes with a low speed gear 82 via a reduction gear train,
The low speed gear 82 is connected to the low speed gear 30 and the slip spring 84.
The operating shaft 14 rotates integrally so that it can be slipped through the operating shaft 14.
As is clear from FIG. 4, a switching gear 36 selectively meshes with each of the low-speed vehicle 30 and high-speed vehicle 32 as shown by the chain line.

FIG. 5 shows a combination structure of the operating shaft 14 and each cam in the present invention, and the figure shows the automatic timer operating state, and the switching gear 36 fixed to the operating shaft 14 is selectively connected to the low-speed vehicle 30. The operating shaft 14 itself rotates at a low speed.
As mentioned above, the main control cam 62 is loosely engaged with the operating shaft 14, and the timer set disc 38 is further disposed on the right end of the main control cam 62.
is fixed, and the relief groove 38 of the timer set disc 38
The protrusion 62a of the main control cam 62 engages with a.
The main control cam 62 rotates the operating shaft 1 with a slight margin.
The second switch lever 64 can be rotated together with the main control cam 62 to achieve quick operation when the second switch lever 64 is depressed onto the main control cam 62. The timer set disk 38 is cam connected to the set cam 40, and when the operating shaft 14 is rotated as shown in the figure, the timer set disk 38 rides on the cam of the set cam 40, and the operating shaft 14 presses the shaft spring 42. The axis is moving to the left. Through this shaft movement, meshing between the switching gear 36 and the low speed wheel 30 is achieved.

As described above, the ignition cam 46 and the timer cam 44 are further engaged with the operating shaft 14, and in the embodiment, the timer cam 44 is connected to the operating shaft 14 through the D hole.
Since the protrusion 46a of the ignition cam 46 engages with the relief groove 44a, the ignition cam 46, which is loosely engaged with the operating shaft 14, also has a slight margin with respect to the operating shaft 14. It is also pivoted. Therefore, both cams 44 and 46 can also provide the corresponding timer control lever 48 and first switch lever 56 with quick operation at the time of falling.

The bottom surface 44b of the timer cam 44 is in contact with the pressing end 52a of the holding lever 52, and the holding lever 52 is always urged counterclockwise in FIG. 5 by the set lever spring 54.
The holding lever 52 can perform a swinging motion following the axial movement of. Then, the lock end 52b of the holding lever 52 engages with the locking piece 48a of the timer control lever 48, and when the timer cam 44 pushes up the timer control lever 48 and further pushes up the lever 48 by the protrusion 44c of the timer cam 44, the lever The locking piece 48a of 48 is engaged and held by the lock end 52b of the holding lever 52, and from then on, the timer control lever 48 no longer comes into direct contact with the timer cam 44, and the large load when controlling the oil supply valve etc. is reduced by friction loss. This prevents this from happening.

The embodiment of the present invention has the above configuration, and its operation will be explained in detail below based on FIGS. 6 to 11.

FIG. 6 shows the operation stopped (off) state, and the timer set disk 38 is aligned with the set cam 40 and has fallen into the cam groove, so the operating shaft 14 is moved by the shaft spring 42.
As a result, the holding lever 52 releases the timer control lever 48 from holding it. and each timer control lever 48, the first
Switch lever 56 and second switch lever 64
have fallen into the respective cam grooves of the timer cam 44, ignition cam 46, and main control cam 62, and as a result, the timer switch 50 is on, the ignition switch 58 is off, and the main switch 60 is also off. As is clear from the diagram, the electrical circuit of the kerosene stove is in a dormant state.

Next, FIG. 7 shows a state in which a 12-hour timer is set by rotating the operating shaft 14 in the counterclockwise direction of FIG.
The operating shaft 14 is moved to the left by the set cam 40, whereby the switching gear 36 is moved to the low speed vehicle 3.
meshes with 0. The rotation of the operating shaft 14 causes the levers 48, 56, 64 to move into the cams 44, 4, respectively.
6, 62, turned off the timer switch 50, and turned off the ignition switch 58 and main switch 6.
Turn on 0. At this time, timer control lever 4
8 is held by the holding lever 52, henceforth, the timer control lever 48 and timer cam 44 do not come into contact with each other, and even though the oil supply valve is controlled, the load thereof does not become a friction loss.

In this state, the motor 22 starts rotating by turning on the switches 58 and 60, and the operating shaft 14 also starts rotating the low speed timer due to the low speed wheel 30. At this time, the timer lamp 66 is also lit, but since the timer switch 50 is in the OFF state, the operation of the stove remains in a dormant state.

FIG. 8 shows a state just before the predetermined 12 hours have elapsed with the operating shaft rotating at a low speed, and at this time both switch levers 56 and 64 are still resting on the ignition cam 46 and the main control cam 62. , the timer control lever 48 is already in a state where it can fall into the cam groove of the timer cam 44. However, immediately before this, the timer control lever 48 is still held by the holding lever 52, so the timer switch 50 is not turned on.

FIG. 9 shows a state in which a predetermined setting time, that is, 12 hours has elapsed, and since the timer setting disk 38 and the setting cam 40 are aligned, the operating shaft 14 is biased rightward by the shaft spring 40, and the operating shaft 14 is biased rightward by the shaft spring 40. result,
The holding lever 52 is pushed by the bottom surface 44b of the timer cam 44 and releases the holding of the timer control lever 48. Therefore, the timer control lever 48 falls into the cam groove of the timer cam 44, and as a result, the timer switch 50 is turned on.

Therefore, the ignition current is supplied to the ignition heater 74 from the transformer 76, and the kerosene stove starts the desired preheating, and at the same time, each blower motor 68, solenoid 70, and operating lamp 72 of the kerosene stove also starts the required operating action. do.

At this time, by moving the operating shaft 14 in the right direction, the switching gear 36 meshes with the high-speed wheel 32, and after this ignition, the operating shaft 14 is rotated at high speed, and the predetermined ignition time is controlled with high precision. .

FIG. 10 shows a state in which the operating shaft 14 is rotated at high speed by the high-speed vehicle 32 and a predetermined period of time, for example, 6 minutes has elapsed since ignition. During this ignition period, the kerosene stove is reliably ignited by the ignition heater 74. is being carried out, and when the operating shaft 14 reaches the "operation" position 6 minutes after the completion of this ignition, the first
As shown in Figure 0, the first switch lever 56
falls on the ignition cam 46, and as a result, the ignition switch 58 is turned off. As a result, the current supply to the ignition heater 74 is cut off, and from then on, the kerosene stove enters a desired electrically controlled operating state in which the amount of air and oil is controlled. Then, by turning off the ignition switch 58, the current supply to the motor 22 is also cut off, thereby stopping the rotation of the operating shaft 14 and completing the timer operation.

FIG. 11 shows a state in which the kerosene heater is extinguished, in which the operating shaft is rotated counterclockwise from the "operating" position, and the second switch lever 64 is moved to the main control cam 62.
By turning off the main switch 60, the operation of the kerosene stove can be stopped and the initial state can be restored.

The automatic timer ignition action is performed as described above, but in order to perform the normal ignition action, it is sufficient to move the operating shaft clockwise from the state shown in Fig. 6 to the "ignition" position shown in Fig. 9. , thereby,
The timer performs high-speed rotation for 6 minutes for ignition, and after reliable ignition, normal operation of the kerosene stove is started.

Therefore, according to the present invention, each of the timer switch and the ignition switch can be controlled by rotating a single operating shaft, and as a result, automatic timer ignition and ignition can be performed using a single operating shaft. It is possible to provide a small-sized timer whose operation can be controlled and which is easy to handle.

Further, according to the embodiment, since the timer control lever does not act as a load on the motor mechanism while the timer is operating, there is an advantage that high loads such as the oil supply valve can be easily controlled.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing a preferred embodiment of the kerosene stove timer according to the present invention, FIG. 2 is a kerosene stove control circuit diagram suitable for FIG. 1, and FIG.
4 is a sectional view showing the motor mechanism deceleration transmission mechanism in FIG. 1, FIG. 5 is a sectional view showing the combination structure of the operating shaft and each cam in FIG. 1, 6 to 11 are explanatory diagrams of the operation in a preferred embodiment of the present invention. 14... Operating shaft, 22... Motor, 26... Reduction gear train, 30... Low speed vehicle, 32... High speed vehicle, 36
...Switching gear, 38...Timer set disc, 40
...Set cam, 44...Timer cam, 46...
Ignition cam, 48...Timer control lever, 50...
Timer switch, 52...Holding lever, 56...
First switch lever, 58...Ignition switch, 6
0...Main switch, 62...Main control cam, 64...
...Second switch lever.

Claims (1)

[Scope of Claims] 1. An operating shaft rotatably supported on the mechanism receiving plate, set for rotation by the user, and controlling the operation of the stove, a motor, a low speed wheel for timer counting, and a preheating time counting device. a motor mechanism including a gear train having a high-speed wheel, which is attached to the mechanism receiving plate and outputs low-speed or high-speed driving force; and for transmitting the low-speed or high-speed driving force of the motor mechanism to the operating shaft; provided on the operating shaft,
a speed switching gear that meshes with either the low-speed vehicle or the high-speed vehicle by movement of the operating shaft in the axial direction and switches the speed of the operating shaft between low speed and high speed; and a set cam provided on the mechanism receiving plate and having a cam groove. and a timer set disk that is provided on the mechanism receiving plate side of the operating shaft to control axial movement in alignment with the set cam in order to switch the speed switching gear, and is rotatable integrally with the operating shaft. a timer cam that is coupled to the operating shaft and controls the opening and closing operations of the timer switch as the operating shaft rotates; and an ignition cam that is coupled to the operating shaft so as to be integrally rotatable and that controls the opening and closing operations of the ignition switch as the operating shaft rotates. a cam, the motor mechanism is driven when the ignition switch is closed, the oil amount and blower motor are driven when the timer switch is closed, and the ignition is started when both the ignition switch and the timer switch are closed. The heater is activated, and the timer counts according to the amount of rotation set by rotating the operating shaft at low speed, and the short time required for preheating is performed by rotating the operating shaft at high speed. A timer for an kerosene stove, which controls a series of automatic ignition operations including timer time counting, preheating, ignition, and operation of the stove by rotating the operating shaft of the kerosene stove. 2. The timer for an oil stove as claimed in claim 1, wherein automatic timer ignition control is performed by rotating the operating shaft in one direction, and ignition control is performed by rotating the operating shaft in the other direction.