JPH035053Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a switch device for a toaster oven, which uses a push button to energize the heater and a bell that strikes the bell body to notify the end of roasting. This invention relates to a device for setting a body.

[Conventional technology]

In the conventional toaster oven switch device, by pushing down an operating lever that is rotatable in the vertical direction, an insulating plate that closes the switch is pushed, and the lowered state of the operating lever is controlled by an electromagnetic coil. It is held by a lock lever that is locked by the excitation operation, and the striking mechanism is set by lowering the operating lever, and when roasting is completed, the electromagnetic coil becomes de-energized, the lock lever is released, and the operating lever is moved upward. At the same time, the bell-striking mechanism was activated to strike the bell.

[Problem that the invention attempts to solve]

The above-mentioned conventional toaster oven switch device had the disadvantage that the operating force required to push down the operating lever was large in order to set and operate the lock lever and the bell-striking mechanism, and the structure was complicated due to the large number of parts. .

This invention was created in view of the above problems.
The switch movable contact piece and the bell striking body can be set by pressing the push button shaft, the operating force can be reduced, and the number of parts can be reduced.
To provide a switch device for a toaster oven with a simple structure.

[Means for solving problems]

The toaster oven switch device of this invention is
An operating portion is provided at the front end of a push button shaft that is supported to move forward and backward, and an armature is attached to the rear end, and an electromagnetic coil that is fixed opposite to the armature and attracts the armature is provided at the retreated position of the push button shaft, A spring attached to the push button shaft urges the push button shaft in the advancing direction, and the coil is excited by the movable contact piece which is pressed by the retreat of the push button shaft and comes into contact with the fixed contact piece. It constitutes a switch that opens and closes the circuit and the heater circuit, and the striking body, which is rotated in the opposite direction to the direction in which the bell body is struck by the retreat of the push button shaft, is struck by the biasing force of the spring when the push button shaft returns and advances. It is characterized in that the bell body is struck by returning to the striking direction of the body.

[Effect]

The toaster oven switch device of this invention is
When the operating part of the push button shaft is pressed, the movable contact piece is pressed and comes into contact with the fixed contact piece, which closes the heater circuit and excites the electromagnetic coil.The armature is attracted to this electromagnetic coil, and the push button is activated. The shaft is held in a retracted state, and the heater circuit is kept energized, and the bell striking body is rotated while being energized by the spring as the push button shaft is retracted. At the end of roasting, the power to the electromagnetic coil is cut off.
The electromagnetic coil releases the armature, and the push button shaft is returned and moved forward by the spring. When the push button shaft returns, the bell striking body is returned by the spring, and the bell striking body strikes the bell to notify the end of roasting. Furthermore, when the push button returns, the movable contact piece separates from the fixed contact piece, and the heater circuit is opened.

〔Example〕

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

In FIG. 10, reference numeral 1 denotes a toaster oven body, and an operation panel 2 is provided on the front surface of this body 1. A fixing piece 4 of a mounting plate 3 is fixed to the inner surface of the operation panel 2 with screws. As shown in FIGS. 1 and 4, this mounting plate 3 consists of a side piece 5 bent rearward at a substantially right angle from the side edge of the fixing piece 4, and a fixing piece bent at a right angle from this side piece 5. 4 and a parallel rear piece 6. 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. As shown in FIG. 2, shaft support holes 10 and 11 are opened in the front piece 8 and rear piece 9 of the mounting base plate 7, respectively, so as to face 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 the shaft support holes 10 of the front piece part 8 are inserted into both sides 12. Recesses 13 and 14 are cut out, respectively, and escape recesses 15 and 16 are cut out in the upper and lower parts of the shaft support holes 10 and 11 of the front piece 8 and the rear piece 9, respectively.

Furthermore, the fixing piece portion 4 has a passage 17 that faces the shaft support hole 10 and is opened larger than the shaft support hole 10 .

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. 2 and 3. It is formed into a substantially elliptical cross-section with both sides flat. 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 square operation part 24 is fixed to the front end of the push button shaft 18, and is fitted into the square fitting hole 23 of the operation panel 2 so as to be movable forward and backward.

Further, 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 push button shaft 18 has a square cross section.

Next, 27 is the armature shown in Figures 4 and 5.
As shown in the figure, the side surface 28 is formed into a substantially U-shape, and the push button shaft 18 is opened downward on the side surface 28.
A rectangular fitting part 29 that fits into the fitting groove 26 of the mounting part 25 is formed with a notch, and caulking pieces 30 are formed on both sides of the fitting part 29 on the lower edge of the one side surface 28.
A notch recess 31 is provided, respectively. And the opening 17 of the fixing piece 4 of the mounting plate 3
The fitting part 29 of one side surface 28 of the armature 27 is inserted into the engagement groove 26 of the mounting part 25 of the push button shaft 18 which is inserted through the shaft support holes 10 and 11 of the mounting base plate 7 so as to be freely reciprocatable and is supported. and attaching part 25.
When the armature 27 is fixed to the push button shaft 18 by caulking the caulking piece 30 as shown by the chain line in FIG.
The other side surface 32 of the push button shaft 18 faces the 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 4 and 6, 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. 1 and 6, 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 the coiled spring 35 is wound around the push button shaft 18. The E-shaped retaining ring 3 is retained in the retaining groove 36 at the front of the push button shaft 18.
7, and the push button shaft 18 is locked to the spring 3.
It is urged forward at 5.

Further, the rear piece 9 of the mounting base plate 7 is formed longer than the front piece 8 as shown in FIGS. 1 and 4, and a molded terminal block 38 is attached to this rear piece 9. This terminal block 38 has a pair of fixed contact pieces 39, 40 and the fixed contact pieces 39, 4.
An elastic movable contact piece 41 is attached to the fixed contact piece 41 which is constantly separated from the fixed contact piece 41 and comes into contact with the fixed contact pieces 39 and 40 through elastic deformation. It constitutes a switch 42 that opens and closes.

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, 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, and includes a first bell striking plate member 45 and a bell striking body. It is composed of a second striking plate member 47 that strikes the body 46. The first bell plate member 45 is formed by pressing a metal plate, and as shown in FIG. It is pivotally supported by a pin 44, and an engagement piece 49 that is engaged with the striking projection 22 is bent and formed at the tip of this pivot support 48. This engagement piece portion 49 is inclined downward from the front side toward the rear side. Also this first
The intermediate portion of the 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 panel 2 . Further, in this connecting portion 50, an engaging piece 52 is located in front of the engaging hole 51 and is cut and raised downward. Further, as shown in FIG. 8, the second bell-beating plate member 47 is formed by pressing a metal plate, and is formed into an abbreviated shape, with the first bell-beating plate member 45 attached to one end side. A lower engaging portion 54 is formed by a step portion 53 corresponding to the wall thickness of , and an engaging groove portion 55 for engaging the engaging piece 52 is cut out in this engaging portion 54 . Also, this second bell striking plate member 47
On the other end side, a striking portion 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. When you insert it and tilt it horizontally,
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 bell 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 is biased by this spring 57 to rotate forward about the pin 44.

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.

When the push button shaft 18 retreats, the bell striking protrusion 22 engages with the engagement piece 49 of the first bell striking plate member 45 and presses the engaging piece 49. 45 with the spring 5 centered around the pin 44.
7 in the counterclockwise direction as shown by the chain line in FIG. With this rotation of the first bell striking plate member 45, the second bell striking plate member 47 is also rotated integrally, and its striking part 56 is separated from the bell body 46, and the push button shaft 18 is moved back. It remains in this state for as long as it lasts. 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. 6). A second bell striking plate member 47 is integrally formed with this first bell striking plate member 45.
The bell also rotates, and its striking part 56 strikes the bell body 46 sen,
Due to this impact, the second striking plate member 47 has its engaging portion 54 swingably engaged with the engaging hole 51 of the connecting portion 50 of the first striking plate member 45. The second striking plate member 47 swings back and forth due to the impact.
The sound effect of the bell body 46 is not impaired. As shown in FIG _. 6, this striking body 43
The distance ₂ from to the bell striking portion 56 of the second bell striking plate member 47 is made longer, and the amount of movement of the push button shaft 18, that is, the amount of rotation of the engaging piece portion 49 of the first bell striking plate member 45 is increased. In comparison, the amount of rotation of the bell striking portion 56 of the second bell striking plate member 47 is increased to increase the amount of rotation of the push button shaft 18.
The amount of pressure is small and the pressure operation force is light.

Furthermore, as shown in FIG.
The bell striking part 56 and the bell are arranged so that the engaging part 54 of the second bell striking plate member 47 inserted into the engaging hole 51 of the connecting part 50 of No. Set the positional relationship with the body 46, and
The bell striking part 56 of the bell striking plate member 47 collides with the bell body 46 and the engaging part 54 is prevented from being rotated to an angle where it comes off from the engaging hole 51, and the striking body 43 is not attached to the mounting plate 3. After attachment, the second striking plate member 47 does not come off from the first striking plate member 45.

Further, on the mounting plate 3, an engagement piece 55 for guiding the first bell-beating plate member 45 of the bell-beating body 43 is formed by bending it at a substantially right angle from the upper edge via a connecting piece 59. 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, so that the first striking plate member 45 rotates smoothly. pin 4 to avoid thermal effects.
Even if the crimping force of 4 is loosened, the second striking plate member 47
The misalignment of the bell striking portion 56 with respect to the bell body 46 can be reduced, and the striking sound can be optimally maintained.

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 moves back, the bell striking protrusion 22 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 resists the spring 57. The second bell striking plate member 47 connected to the first bell striking plate member 45 also rotates together, and the bell striking portion 56 is separated from the bell body 46. When the push button shaft 18 retreats, the switch operating projection 20 and the bell striking projection 22 are coupled to 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 sides, the push button shaft 18 will not move. The cross section is approximately elliptical, and the shaft support hole 1 of the mounting base plate 7
Since the push button shafts 0 and 11 are also substantially elliptical, the push button shaft 18 is not rotated in the circumferential direction.

Furthermore, even if burrs are formed on the upper and lower parts of the push button shaft 18 at the upper and lower axial parting lines during molding, relief recesses 15 and 16 are formed above and below the shaft support holes 10 and 11. The push button shaft 18 is operated 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.

Further, the distance ₂ from the rotation center of the bell striking body 43 to the engagement piece 49 is larger than the distance L ₁ from the center of rotation to the engagement piece 49, and the amount of rotation of the bell striking portion 56 is larger than the amount of rotation of the engagement piece 49. The amount of movement of the push button shaft 18 is reduced, the operating force is lightened, and 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 opened/closed and the bell set can be operated by pressing the operating section provided at the front end of the push button shaft, which moves back and forth in the axial direction in the same way as a push button switch, and the push button shaft can then be moved back and forth. The armature provided at the end is attracted to the electromagnetic coil and held in the operating position, and when the electromagnetic coil is de-energized, the push button returns and the switch is released, and the striking body performs a striking action to fire the bell. The device notifies the end of baking, has a simple configuration with a small number of parts, and can be operated with light operating force since the load on the push button shaft is small because of the small number of parts.

[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 push button shaft and the mounting base plate, and Fig. 3 is a perspective view of the push button shaft and the first mounting plate. Perspective view of striking plate member, 4th
The figure is a perspective view of the push button shaft and the movable contact piece, FIG. 5 is a perspective view of the armature, FIG. 8 is an exploded perspective view of the bell striking plate member, FIG. 9 is a perspective view showing a connected state of a part of the above, and FIG. 10 is a toaster oven incorporating the above switch device. FIG. 18...Push button shaft, 24...Operation unit, 27
... Armature, 33 ... Electromagnetic coil, 35 ...
...Spring, 39, 40...Fixed contact piece, 41...
...Movable contact piece, 43...Bell striking body, 46...Bell body, 5
7...Spring.

Claims (1)

[Claims for Utility Model Registration] (1) A push button shaft that is supported so as to be movable and has an operating section at its front end and an armature attached to its rear end, and the push button shaft is fixed in the retracted position facing the armature. an electromagnetic coil that attracts the armature; a spring that is attached to the push button shaft and urges the push button shaft in the advancing direction; The movable contact piece that closes the excitation circuit and heater circuit of the coil is rotated in the opposite direction to the direction in which the bell body is struck by the retreat of the push button shaft, and the bell body is rotated by the biasing force of the spring as the push button shaft returns and advances. A switch device for a toaster oven, characterized in that it is equipped with a bell striking body that is rotated back in the direction of impact. (2) The push button shaft is molded from synthetic resin and has projections integrally formed on both sides thereof to operate the movable contact piece and the striking body, respectively, as claimed in claim 1 of the utility model registration. Toaster oven switch device.