JPH035054Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a switch device for a toaster oven, which energizes the heater in the roasting chamber by pressing a button and is held in the retracted position when roasting is completed. The present invention relates to a structure for opening a heater circuit by returning a push button to cut off power to a heater.

[Conventional technology]

This conventional toaster oven switch device pushes down an operating lever that is rotatable in the vertical direction, thereby pushing the switch lever and closing the switch. It is held by a lock lever that locks when the coil is energized. When roasting is completed, the electromagnetic coil becomes de-energized, the lock lever is released, and the operating lever is returned upward by the spring. As the operating lever rises, the heater A structure was adopted in which electricity was cut off.

In the conventional toaster oven switch device described above, in order to operate the operating lever by pressing down, it is necessary to form a guide groove on the front panel of the toaster body to move the operating lever in the vertical direction. It is not possible to install operating parts such as other switches within the range of movement of the I needed to make the panel bigger. Therefore, there is a demand for a structure in which the actuation is performed using a push button on the front panel that requires a small area for actuation, instead of an actuation lever that moves up and down.

[Problem that the invention attempts to solve]

However, in order to keep the switch that energizes the roasting chamber heater with a push button,
The switch must be held in the closed state by the switch operating protrusion provided on the push button shaft, and if a lock lever is used like in a conventional toaster, a large amount of force is required to press the push button shaft. If the push button shaft is pressed with a large force, the toaster body will move, making operation unstable, and the structure will be complicated due to the large number of parts, making assembly time-consuming.

The present invention was developed in view of the above-mentioned problems, and has a simple structure for holding the push button in the retracted position so that the switch continues to operate using the push button shaft. To provide a toaster which can be operated by push buttons and can be assembled at low cost.

[Means for solving problems]

The toaster oven switch device of this invention is
An operating part is provided at the front end, and a push button shaft is supported so as to be able to move forward and backward while being biased in the advancing direction, and is held in a retreat position during roasting, and is operated by the retreat of the push button shaft to close the heater circuit. an armature attached to the push button shaft; and an electromagnetic coil that is energized when the push button shaft is retracted to attract the armature and hold the push button shaft in the retracted position;
An engagement groove is formed in the rear end of the push button shaft, a notch is formed in the armature to engage the engagement groove, and the engagement part of the armature is engaged with the push button shaft. This is characterized in that the armature is fixed to the push button shaft by crimping the crimping pieces that fit into the groove and are formed on both sides of the fitting portion of the armature.

[Effect]

The toaster oven switch device of this invention is
When the operating part of the push button shaft is pressed, the switch is closed, the heater circuit is closed, and the electromagnetic coil is energized, which energizes the armature attached to the push button shaft. The push button shaft holds the switch closed. At the end of roasting, the electromagnetic coil becomes de-energized, the armature is released from its adsorption, and the push button shaft returns to the front and moves forward. When the push button shaft returns, the heater circuit is opened. The armature of the push button shaft can be easily installed by simply fitting the fitting part into the engagement groove of the push button shaft and caulking the caulking piece. It operates satisfactorily even with small pressing force.

〔Example〕

The configuration of an embodiment of the present invention will be described with reference to the drawings.

In Fig. 10, 1 is a toaster oven body, and the front panel 2 for operation is provided on the front of this body 1.
is provided. A mounting plate 3 is provided on the inner surface of the operation panel 2 as shown in FIGS. 1 and 3.
A fixed piece 4 is fixed with screws. This mounting plate 3 includes a side piece 5 bent rearward at a substantially right angle from the side edge of the fixing piece 4, and a rear piece 6 parallel to the fixing piece 4 bent at a right angle from this side piece 5. have. Further, a substantially U-shaped mounting base plate 7 is fixed to the side piece 5 of the mounting plate 3, located between the fixed piece 4 and the rear piece 6. This mounting plate 7
As shown in FIG. 6, shaft support holes 10 and 11 are opened in the front piece part 8 and the rear piece part 9, respectively, so as to be spaced apart from each other and facing each other. The shaft support holes 10 and 11 of the front piece part 8 and the rear piece part 9 are formed in a substantially elliptical shape with both side surfaces flat, and both side edges 12 of the shaft support hole 10 of the front piece part 8 are Insertion recesses 13 and 14 are formed with cutouts, respectively, and the shaft support holes 1 of the front piece 8 and the rear piece 9
Relief recesses 15 are provided at the upper and lower edges of 0 and 11, respectively.
16 is notched.

Furthermore, as shown in FIGS. 1 and 3, the fixed piece portion 4 has a hole 17 that faces the shaft support hole 10 and is opened larger than the shaft support hole 10. As shown in FIGS.

Reference numeral 18 denotes an electrically insulating push button shaft, which can be inserted into the shaft support holes 10 and 11 of the front piece 8 and the rear piece 9 of the mounting base plate 7 so as to be able to advance and retreat, as shown in FIGS. 6 and 7. The push button shaft 18 is formed into a generally elliptical cross-sectional shape with both sides flat, and the shape of the shaft support holes 10 and 11 is matched to the cross-sectional shape of the push button shaft 18. The push button shaft 18 is molded from synthetic resin, and is formed so that the parting line during molding is located along the axial direction in the upper and lower center.

Also, a flat part 19 on one side of this push button shaft 18
A switch operating protrusion 20 is integrally formed on the other side plane part 21, and a bell striking protrusion 22 is integrally formed at the front side of the switch operating protrusion 20, and the upper surface of this bell striking protrusion 22 extends from the front to the rear. slanted downwards towards.

Further, a 10th
As shown in the figure, a rectangular operating portion 24 is fixedly fitted into the rectangular fitting hole 23 of the front panel 2 so as to be movable forward and backward.

Furthermore, as shown in Fig. 2, this push button shaft 1
An engagement groove 26 is formed in the circumferential surface of the mounting portion 25 at the rear end of the push button shaft 18 so that the cross section of the push button shaft 18 is square.

Next, reference numeral 27 denotes an armature, which is formed into a substantially U-shaped side surface as shown in FIGS. A rectangular fitting portion 29 that fits into the fitting portion 26 is formed with a cutout, and cutout recesses 31 forming caulking pieces 30 are provided on both sides of the fitting portion 29 at the lower edge of the one side surface 28, respectively. . Then, it is inserted into the engagement groove 26 of the mounting part 25 of the push button shaft 18 which is inserted through the opening 17 of the fixed piece part 4 of the mounting plate 3 and is inserted into the shaft support holes 10, 11 of the mounting base plate 7 so as to be freely forward and backward. When the armature 27 is fixed to the push button shaft 18 by engaging the fitting portion 29 on one side surface 28 of the armature 27 and caulking the caulking piece 30 to the mounting portion 25 as shown by the chain line in FIG. This armature 27 as shown in the figure
The other side surface 32 faces the rear end surface of the push button shaft 18 with a small gap therebetween. In this state, the push button shaft 18 is attached to one side 2 of the armature 27.
8 is in contact with the rear piece 9 of the mounting base plate 7 to prevent it from coming off in the forward direction.

Further, on the rear piece 6 of the mounting plate 3, FIG.
As shown in Figures 3 and 4, the push button shaft 1
The other side surface 3 of the armature 27 attached to 8
An electromagnetic coil 33 that faces 2 and attracts the other side 32 is wound around a coil bobbin 34 and fixed thereto.

Further, as shown in FIGS. 3 and 4, a coiled spring 35 whose rear end is locked to the front piece 8 of the mounting base plate 7 is wound around the push button shaft 18, and the front end of this coiled spring 35 is wound around the push button shaft 18. is locked by a retaining ring 37 that is locked in a locking groove 36 at the front of the push button shaft 18, and the push button shaft 18 is urged forward by a spring 35.

Further, the rear piece 9 of the mounting base plate 7 is formed longer than the front piece 8 as shown in FIGS. 1, 3, and 6, and this rear piece 9 has a molded terminal block. 38 is installed, and this terminal block 3
8 has a pair of fixed contact pieces 39 and 40, and the fixed contact pieces 39 and 40 are constantly separated and elastically deformed.
An elastic movable contact piece 41 is attached to contact the fixed contact pieces 39, 40 and the movable contact piece 4.
1 constitutes a switch 42 that opens and closes the heater circuit and the electromagnetic coil circuit.

This movable contact piece 41 is connected to the push button shaft 1.
When the push button shaft 18 is retracted, it is pressed by the switch operating projection 20 of No. 8, and the fixed contact pieces 39, 4 are pressed.
0, the heater circuit is closed, and at the same time the circuit of the electromagnetic coil 33 is closed, the armature 27 is attracted by the excitation of the electromagnetic coil 33, the push button shaft 18 is held in the retracted position, and the switch 42 is is kept closed. Furthermore, when the electromagnetic coil circuit is opened by a switch (not shown) upon completion of roasting, the electromagnetic coil becomes de-energized.
Release the adsorption of armature 27 and press button shaft 1.
8 is a movable contact piece 4 that is moved forward by the biasing force of a spring 35 and is pressed by the switch operating protrusion 20.
1 is elastically restored and separated from the fixed contact pieces 39 and 40, and the switch 42 is opened to cut off the power supply to the heater circuit.

Next, 43 is a bell striking body 4, which is rotatably attached to the overlapping part of the side piece 5 of the mounting plate 3 and the mounting base plate 7 with a pin 44, as shown in FIGS. 3 and 4. It is composed of a first bell striking plate member 45 that strikes the bell body 46, and a second striking plate member 47 that strikes the bell body 46. This first striking plate member 45 is formed by pressing a metal plate, and is shown in FIGS. 5, 7 to 9.
As shown in the figure, the lower part has a shaft support 48 bent into a substantially L-shape, and this shaft support 48 is connected to the pin 44.
Further, at the tip of this pivot support 48, an engagement piece 49 which is engaged with the striking projection 22 is formed by bending. This engagement piece 49
is sloped downward from the front to the rear. Further, the intermediate portion of the first striking plate member 45 is bent laterally at a substantially right angle, and a connecting portion 50 is formed at the tip. An engagement hole 51 is bored in the connecting portion 50 in a direction parallel to the front panel 2. Further, an engagement piece 52 is formed in the connecting portion 50 and is cut and raised downward so as to be located in front of the engagement hole 51 . Further, as shown in FIG. 8, the second bell-beating plate member 47 is formed into a substantially L-shape by pressing a metal plate, and one end thereof is connected to the first bell-beating plate. A step part 53 corresponding to the wall thickness of the member 45 forms an engaging part 54 that is one step lower, and an engaging groove part 55 for engaging the engaging piece 52 is cut out in the engaging part 54. . Further, on the other end side of this second striking plate member 47, a striking part 56 is formed which is bent upward at a right angle. Then, insert the engaging portion 54 of the second striking plate member 47 into the engaging hole 51 of the connecting portion 50 of the second striking plate member 47 from above to the stepped portion 53 as shown by the chain line in FIG. If you insert it and tilt it horizontally as shown in Figure 9,
The stepped portion 53 engages with the edge of the connecting portion 50, and the engaging portion 5
The engagement groove 55 of No. 4 engages with the engagement piece 52 of the first striking plate member 45, and the second striking plate member 47 is swingably connected to the first striking plate member 45. .

Further, a coiled spring 5 is installed between the first bell plate member 45 and the fixing piece 4 of the mounting plate 3.
7 is tensioned, and this spring 57 causes the first bell striking plate member 45 to move forward toward the pin 44.
It is biased to rotate around the center.

Further, the bell body 46 is attached to the inner surface of the panel 2 as shown in FIG.
A bell striking portion 56 of the second bell striking plate member 47 is attached to the edge of the bell striking portion 56 of the second bell striking plate member 47.
are facing each other.

Then, when the push button shaft 18 retreats, the striking projection 22 engages and slides into the engaging piece 49 of the first striking plate member 45, presses this engaging piece 49, and strikes the first bell. The plate member 45 is rotated counterclockwise about the pin 44 against the spring 57 as shown by the chain line in FIG. With this rotation of the first bell striking plate member 45, the second striking plate member 47 is also rotated integrally,
The striking portion 56 is separated from the bell body 46 and is maintained in this state while the push button shaft 18 is retracted. Further, when the push button shaft 18 returns and advances, and the pressing of the engagement piece 49 by the bell striking protrusion 22 is released, the first striking plate member 45 is rotated by the biasing force of the spring 57 (clockwise in FIG. 4). and this first
The second bell striking plate member 4 is integrated with the second bell striking plate member 45.
7 also rotates, and its striking portion 56 strikes the bell body 46, and this striking causes the second striking plate member 47 to engage the engagement hole 51 of the connecting portion 50 of the first striking plate member 45. Since the engaging portion 54 is swingably engaged with the ring, the second bell striking plate member 47 swings back and forth due to the impact at the time of hitting, and the sound effect of the bell striking body 46 is not impaired. This striking body 43 is connected to the engagement piece 49 from the pin 44.
The distance L2 from the pin 44 to the bell-striking portion 56 of the second bell-striking plate member 47 is made longer than the distance L1 from the pin 44 to the bell-striking portion 56 of the second bell-striking plate member 47. The amount of rotation of the bell striking portion 56 of the second bell striking plate member 47 is made larger than the amount of rotation of the engagement piece portion 49, so that the amount of pressing of the push button shaft 18 is small and the pressing operation force is light. ing.

Further, the engaging portion 54 of the second striking plate member 47 that is inserted into and engaged with the engaging hole 51 of the connecting portion 50 of the first striking plate member 45 is not rotated to an angle where it is removed from the engaging groove portion 55. The striking part 56 and the bell body 46
The positional relationship is set so that the bell striking part 56 of the second bell striking plate member 47 will not be rotated to an angle where the engaging part 54 will come off from the engaging hole 51 when it collides with the bell body 46. , after the bell-striking body 43 is attached to the mounting plate 3, the second bell-striking plate member 47 is attached to the first bell-striking plate member 4.
It never deviates from 5.

Further, as shown in FIGS. 1 and 3, a guide piece 58 for guiding the first bell-striking plate member 45 of the bell-striking body 43 is attached to the mounting plate 3 from the upper edge to the connecting piece 5.
9, the first striking plate member 45 is configured to rotate between the inner surface of the side piece 5 of the mounting plate 3 and the outer edge of the guide piece 58,
Even if the caulking force of the pin 44 is loosened so that the first bell striking plate member 45 rotates smoothly and is not affected by thermal effects, the bell striking portion 56 of the second bell striking plate member 47 does not reach the bell body 46. This allows for less misalignment with respect to the ring, and optimally maintains the striking sound.

The operation of the next embodiment will be explained.

When the operation part 24 of the push button shaft 18 is pressed,
The push button shaft 18 is retracted while compressing the spring 35. With this retraction of the push button shaft 18,
The switch operating protrusion 20 pushes the movable contact piece 41,
The movable contact piece 41 is elastically deformed and becomes the fixed contact piece 39, 40.
, the heater circuit is closed and the heater in the roasting chamber is energized. Since the push button shaft 18 is insulative, there is no problem even if the movable contact piece 41 is directly pressed. The electromagnetic coil 33 is also energized, and the other side 32 of the armature 27 attached to the retracted push button shaft 18 is energized.
is attracted, and the push button shaft 18 is held in the retracted state. Further, when the push button shaft 18 retreats, the bell striking protrusion 22 slides and pushes the engagement piece 49 of the first bell striking plate member 45 of the bell striking body 43, and the first bell striking plate member 45 is moved. The second bell striking plate member 47 that rotates against the spring 57 and is connected to the first bell striking plate member 45 also rotates together, and the bell striking part 56 is separated from the bell body 46. . When the push button shaft 18 retreats, the switch actuating projection 20 and the bell striking projection 22 engage with the movable contact piece 41 and the first striking plate member 45, and even if the push button shaft 18 receives pressing force from the left and right side surfaces, the push button shaft 18
has a substantially elliptical cross section, and the shaft support holes 10 and 11 of the mounting base plate 7 also have a substantially elliptical shape, so the push button shaft 18 is not rotated in the circumferential direction. The switch actuating projection 20 and the bell striking projection 22 of the push button shaft 18 are not misaligned with the movable contact piece 41 and the engaging piece portion 49 of the first striking plate member 45.

Furthermore, even if burrs are formed on the upper and lower parts of the push button shaft 18 due to the upper and lower axial parting lines during molding, there are escape recesses 1 at the upper and lower parts of the shaft support holes 10 and 11.
5 and 16 are formed, so the push button shaft 1
8 operates smoothly without getting caught when moving forward or backward.

Further, when the electromagnetic coil 33 is de-energized by opening a timer switch (not shown) or the like upon completion of roasting, the armature 27 is released from adsorption, and the push button shaft 18 is returned forward by the spring 35. , the pressure on the movable contact piece 41 by the switch operating protrusion 20 is released, the movable contact piece 41 returns due to its elasticity and separates from the fixed contact pieces 39, 40, and the heater circuit is opened. Further, the pressing of the engagement piece 49 of the first bell plate member 45 by the bell striking protrusion 22 of the push button shaft 18 is released, and the first bell striking plate member 45 is rotated back by the spring 57. The second bell striking plate member 47, which rotates integrally with the first bell striking plate member 45, also rotates, and its striking portion 56 hits the bell body 46, and the bell body 46 emits a sound. Notifies the end of roasting. When the bell striking body 43 rotates, the first bell striking plate member 45 is guided between the guide piece 58 and the side piece 5 of the mounting plate 3, and the first bell striking plate member 45
Since the engagement piece 52 is engaged with the engagement groove 55 of the engagement portion 54 of the second striking plate member 47 inserted and engaged with the engagement hole 51 of the connecting portion 50, the second striking bell is The bell striking portion 56 of the plate member 47 strikes the bell body 46 without being displaced.

Furthermore, since the first bell striking plate member 45 is biased by the spring 57 in the striking direction of the bell body 46, it is possible to increase the striking effect of the bell body 46 even if the amount of movement of the push button shaft 18 is small. can.

Furthermore, the distance L2 from the center of rotation of the bell striking body 43 to the engagement piece 49 is greater than the distance L1 from the center of rotation to the engagement piece 49, and the amount of rotation of the bell striking portion 56 is greater than the amount of rotation of the engagement piece 49. By reducing the amount of movement of the push button shaft 18 and lightening the operating force, the amount of movement necessary for striking the bell striking body 43 can be obtained.

When assembling, insert the push button shaft 18 with the operating section 24 attached to the opening 1 of the fixed piece 4 of the mounting plate 3.
7 into the shaft support holes 10 and 11 of the mounting base plate 7. At this time, the switch operating protrusion 20 and the striking protrusion 22 of the push button shaft 18 are inserted into the insertion recess 1 of the shaft support hole 10.
3 and 14 and is pivotally supported and protrudes from the rear piece 9 of the mounting base plate 7.
6 is fitted with the fitting portion 29 of the armature 27, and the caulking piece 30 is caulked to fix the armature 27 to the push button shaft 18. In this state, the push button shaft 18 is prevented from coming off. and push button shaft 18
Since it is an electrically insulating material, the movable contact piece 41 can be directly pressed by the switch operating protrusion 20, and there is no need for an intervening insulating material.

Further, the striking body 43 is attached to the mounting plate 3 by connecting the first striking plate member 45 and the second striking plate member 47 through engagement between the engagement hole 51 and the engaging portion 54. The movement range of the bell-striking body 43 is restricted by the bell-striking portion 56 of the second bell-striking plate member 47 coming into contact with the bell body 46;
The second striking plate member 47 does not come off from the first striking plate member 45.

[Effect of idea]

According to the present invention, the switch can be closed and the heater circuit can be closed by pressing the operation part provided at the front end of the push button shaft that moves back and forth in the axial direction in the same way as a push button switch. Fit the fitting part cut out in the armature into the engagement groove formed at the rear end of the push button shaft, and caulk the caulking pieces formed on both sides of the fitting part of the armature to secure the armature to the push button shaft. Therefore, when the push button shaft is pressed, the switch is closed and the heater circuit is energized, and when the push button shaft is moved back, the electromagnetic coil is energized, which attracts the armature and holds the push button shaft in the retreat position. There is no need to use a lock lever, the pressing force on the push button shaft can be reduced, the armature can be attached to the push button shaft without using any other parts, the number of parts is small, and it can be assembled at low cost. Furthermore, since the push button shaft only moves forward and backward, the panel section in which the operating section of the push button shaft is arranged can be effectively utilized.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a switch device for a toaster oven showing an embodiment of the present invention, Fig. 2 is a perspective view of the mounting part of the armature shown above, Fig. 3 is a perspective view of the switch device shown above, and Fig. 4 is a vertical view of the same as above. Side sectional view, fifth
The figure is a side view of the bell-striking part, FIG. 6 is a perspective view of the push-button shaft and mounting base plate, FIG. 7 is a perspective view of the push-button shaft and the bell-striking plate member, and FIG. 8 is the same as above. FIG. 9 is an exploded perspective view of the bell striking body, FIG. 9 is a perspective view showing a connected state of a part of the above, and FIG. 10 is a perspective view of the toaster oven. 18...Push button shaft, 24...Operation unit, 26
...Engaging groove, 27... Armature, 29... Fitting portion, 30... Caulking piece, 33... Electromagnetic coil,
42...Switch.

Claims (1)

[Scope of utility model registration request] An operating part is provided at the front end, and a push button shaft is supported so as to be able to move forward and backward while being biased in the advancing direction, and is held in a retreat position during roasting, and is operated by the retreat of the push button shaft to close the heater circuit. an armature attached to the push button shaft; and an electromagnetic coil that is energized when the push button shaft is retracted and attracts the armature to hold the push button shaft in the retracted position;
An engagement groove is formed in the rear end of the push button shaft, a notch is formed in the armature to engage the engagement groove, and the engagement part of the armature is engaged with the push button shaft. A switch device for an oven toaster, characterized in that the armature is fixed to a push button shaft by crimping caulking pieces formed on both sides of a fitting part of the armature that fit into a groove.