JP4792917B2 - Electronic component unit and rice cooker fitted with the same - Google Patents

Description

  The present invention relates to an electronic component unit having a can case-type crystal resonator and a rice cooker including the electronic component unit.

Conventionally, this type of electronic component unit often uses a can-case type crystal resonator in order to accurately measure time. In order to suppress the vibration of the can-case type crystal unit, there is one that fixes the flat package type electronic component and the crystal unit using a thermosetting adhesive (for example, see Patent Document 1). . In addition, there is a method of soldering a can case by applying a solder cream on a substrate in advance and dissolving the solder cream in a soldering process in order to eliminate the need for attaching an adhesive (for example, Patent Documents). 2).
JP-A-10-270824 JP 2000-223829 A

  However, in such a conventional configuration, the can case constituting the crystal unit is directly bonded, and the crystal unit vibrates and the lead wire is disconnected due to insufficient adhesive or solder cream. There was a problem.

  SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and without using an adhesive or a solder cream, a can case type crystal unit is fixed to prevent vibration of the crystal unit, and a highly reliable electronic component unit It is the first purpose to provide.

  Moreover, it is the 2nd objective to provide the rice cooker which can respond to various operation shapes and has high design property.

In order to achieve the first object, the electronic component unit of the present invention has a fixing means for fixing a display means for performing a display operation attached to a substrate, a crystal resonator constituting an oscillation circuit is mounted on the substrate, The oscillation frequency of the oscillation circuit is read by the means and time-measured. The battery is used as a power source for the time-measurement means . The fixing means is made of a resin material, and the two protrusions protrude toward the substrate. The quartz oscillator is supported by the substrate, and the extending portion is disposed on the upper portion of the battery at a position lower than the length of the terminal portion of the battery .

  As a result, the crystal resonator is pressed at three points, and the vibration in the vertical direction and the vibration in the horizontal direction can be suppressed. Therefore, disconnection of the lead wire of the crystal resonator due to the vibration can be prevented.

Moreover, in order to achieve the second object, the rice cooker of the present invention detachably stores a pan in the rice cooker body, heats this pan with heating means, and opens the upper surface opening of the rice cooker body. openably covered by a lid, electronic component unit of the above SL are those attached to the rice cooker main body or the lid.

  Thereby, by comprising a display operation part with an electronic component unit, it can respond to various operation shapes, and can provide a rice cooker with high design property.

  Since the electronic component unit of the present invention can prevent disconnection of the lead wire of the crystal resonator, it can provide an electronic component unit with few failures, and the rice cooker equipped with this electronic component unit corresponds to various operation shapes. It is possible to provide a rice cooker with high design.

According to a first aspect of the present invention, there is provided fixing means for fixing display means for performing a display operation and attaching the display means to a substrate, a crystal resonator mounted on the substrate and constituting an oscillation circuit, and timing means for reading an oscillation frequency of the oscillation circuit and measuring time. A battery serving as a power source for the time measuring means, the fixing means being made of a resin material, projecting two protrusions toward the substrate, and supporting the crystal oscillator by the two protrusions and the substrate An electronic component unit in which an extending portion is arranged at a position lower than the length of the battery terminal portion at the upper portion of the battery , and the can case of the crystal unit is supported at three points. Since the vibration in the direction and the vibration in the lateral direction can be suppressed, disconnection of the lead wire of the crystal resonator due to the vibration can be prevented. Further, since the fixing means for fixing the display means is used, the cost and mounting time of the adhesive can be reduced, and a low-cost electronic component unit can be provided.

Furthermore , since the battery can be prevented from coming off from the substrate, it is possible to prevent the battery from being detached from the substrate due to vibration during the soldering process and falling into the solder bath. Therefore, a highly safe electronic component unit can be provided. Further, since the battery is provided on the substrate, the time display can be set to the current time during the substrate inspection process, and the time can be measured as it is.

The second invention is, in the above Symbol first invention, a switch to be mounted on the substrate, the fixing means is an electronic component unit having an operation portion for pushing the switch, the use of switches of different heights Since the height can be adjusted in the operating part, it is possible to easily cope with various operation shapes. Moreover, since the operating part and the fixing means are integrally formed, an electronic component unit with low cost can be provided.

3rd invention is the pan stored in the rice cooker main body so that attachment or detachment is possible, the heating means which heats the said pan, the lid | cover which opens and closes the upper surface opening part of the said rice cooker main body, and said 1st or 2 And the electronic component unit is a rice cooker attached to the rice cooker body or lid, and the display operation unit is configured by the electronic component unit to perform various operations. A rice cooker that can correspond to the shape and has high designability can be provided. In addition, by providing the operation display unit with a low ambient temperature with a battery, the battery life can be extended.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is a cross-sectional view of an essential part of an electronic component unit according to Embodiment 1 of the present invention, FIG. 2 is a top view of the electronic component unit, FIG. 3 is a cross-sectional view of the electronic component unit, and FIG. A bottom view is shown. In order to simplify the drawing, some of the electronic components are omitted.

  As shown in FIG. 2, the board | substrate 1 adhere | attaches copper foil to paper phenolic material. The display means 2 displays information necessary for rice cooking and heat retention such as the current time and display at the time of menu selection. In this embodiment, a liquid crystal panel is used. The fixing means 3 fixes the display means 2 and attaches it to the substrate 1. For example, a resin material such as PET or ABS is molded, and a recess in which the display means 2 can be fitted on the upper surface as shown in FIG. 3a is provided, and the display means 2 is fitted and fixed in the recess 3a.

  In order to hold the fixing means 3, a plurality of holding holes 24 are provided in the substrate 1, and the fixing means 3 is inserted into the holding holes 24 to fix the fixing means 3 to the substrate 1. The portion of the fixing means 3 to be inserted into the substrate 1 is hooked so that it can be held stably.

The crystal resonator 5 is a can case type crystal resonator mounted on the substrate 1 and connected to a microcomputer 23 mounted on the lower surface of the substrate 1 to constitute an oscillation circuit as shown in FIG. Further, the microcomputer 23 is provided with a time measuring means for reading and measuring the oscillation frequency of the oscillation circuit, and displays information necessary for rice cooking and heat retention such as an accurate current time or a menu selection display on the display means 2. To do. Further, as will be described later, since the battery 4 is provided on the same substrate, the time display can be set to the current time during the substrate inspection process, the time can be kept as it is, and the display of the current time can be updated.

  As shown in FIG. 1, the fixing means 3 is configured to project two projecting portions 22 toward the substrate 1 and to support the crystal oscillator 5 with the two projecting portions 22 and the substrate 1.

  The ceramic oscillator 21 is connected to a microcomputer 23 to constitute an oscillation circuit, and the microcomputer 23 is accurately operated by reading the oscillation frequency of the oscillation circuit. Although this ceramic oscillator 21 is not particularly illustrated, the lead wire is bent after passing through the hole of the substrate 1 and is not detached even if it receives vibration.

  The battery 4 supplies electric power to operate the time measuring means when it becomes impossible to supply electric power from a commercial power source. In this embodiment, a lithium primary battery is used, and FIGS. As shown in FIG. On the upper part of the battery 4, an extending portion 3 b provided in the fixing means 3 is arranged. In the present embodiment, the distance from the upper surface of the battery 4 to the lower surface of the extending portion 3b is about 3 mm, which is shorter than the length of the terminal portion of the battery 4 (4 mm). It does not come out of the substrate 1. Therefore, it is possible to prevent the battery 4 from being detached from the substrate 1 due to vibration during the soldering process and falling into the solder bath.

  The switch 25 is mounted on the substrate 1 and connected to the microcomputer 23 to perform a predetermined input when operated by the user. The operating unit 6 for pressing the switch 25 is formed integrally with the fixing means 3. Yes. Here, the elasticity of the working part 6 is given by reducing the thickness of the resin part connected to the working part 6.

  The operation of the above configuration will be described. Since the two protrusions 22 protrude from the fixing means 3 toward the substrate 1 and the crystal oscillator 5 is supported by the two protrusions 22 and the substrate 1, three can cases of the crystal resonator 5 are provided. Therefore, the vibration in the vertical direction and the vibration in the horizontal direction can be suppressed, so that the disconnection of the lead wire of the crystal unit 5 due to the vibration can be prevented.

  Further, since the fixing means 3 has the extending portion 3b arranged on the upper part of the battery 4, it is possible to prevent the battery 4 from being detached from the substrate 1, and the battery 4 is detached from the substrate 1 due to vibration during the soldering process. It can prevent falling into the solder bath.

  Moreover, since the fixing means 3 has the operation part 6 which presses the switch 25, even if it uses a switch with different height, height can be adjusted with the operation part 6, and it respond | corresponds easily to various operation shapes. be able to.

  As described above, in the present embodiment, the fixing unit 3 is configured to project the two protrusions 22 toward the substrate 1 and to support the crystal oscillator 5 with the two protrusions 22 and the substrate 1. As a result, the can case of the crystal unit 5 is supported at three points, and the vibrations in the vertical direction and the horizontal direction can be suppressed, so that the disconnection of the lead wire of the crystal unit 5 due to the vibration is prevented. be able to. Further, since the fixing means 3 for fixing the display means 2 is used, the cost and mounting time of the adhesive can be reduced, and a low-cost electronic component unit can be provided.

  Further, since the extending means 3b is arranged on the upper portion of the battery 4, the fixing means 3 can suppress the battery 4 from being detached from the substrate 1, so that the battery 4 is detached from the substrate 1 due to vibration during the soldering process. , Can be prevented from falling into the solder bath. Therefore, a highly safe electronic component unit can be provided. Moreover, since the battery 4 is provided on the substrate 1, the time display can be set to the current time during the substrate inspection process, and the time can be measured as it is.

  Moreover, since the fixing means 3 has the operation part 6 which pushes the switch 25, even if it uses a switch with different height, since the height can be adjusted with the operation part 6, it can be easily made into various operation shapes. Can respond. Moreover, since the operation part 6 and the fixing means 3 are integrally formed, an electronic component unit with a low cost can be provided.

(Embodiment 2)
FIG. 5: shows sectional drawing of the rice cooker in Embodiment 2 of this invention. In order to simplify the drawing, lead wires for electrical connection and screws for fixing parts are omitted.

  As shown in FIG. 5, the rice cooker body 7 has a lid 8 that is openable and closable so as to cover the upper surface opening. A storage portion 9 is provided in the inside of the rice cooker body 7 so that the pan 12 can be detachably attached. A first heating coil (heating means) 10 is disposed at the bottom of the storage portion 9, A ferrite core 11 is disposed on the outer peripheral side of the heating coil 10. The first heating coil 10 is a winding having a center almost directly below the center of the bottom of the pan 12.

  The pan 12 has a flange 13 protruding outward from the upper end opening, and is placed in the storage portion 9 in a detachable manner by placing the flange 13 in a state of being lifted from the upper end of the storage portion 9. Therefore, the pan 12 has a gap with the storage portion 9 when stored.

  A lid heating plate 14 is detachably provided on the lid 8. The lid heating plate 14 is made of a metal such as stainless steel. The second heating coil 15 is built in the lid 8 to inductively heat the lid heating plate 14. The circuit board 16 controls the first heating coil 10 and the second heating coil 15, and is mounted with an IGBT, a diode bridge, a capacitor, and the like.

  The electronic component unit 17 is configured according to the first embodiment. In the present embodiment, the electronic component unit 17 is disposed on the lid 8 and has a function as an operation display unit, and is electrically connected to the circuit board 16. .

  The winding type power cord storage portion 18 is electrically connected to the circuit board 16 via a lead wire. The power cord storage unit 18 can wind up the power cord using a stopper and a spring. The temperature detection means 19 is composed of a thermistor and is arranged at the approximate center of the bottom of the pan 12 so as to detect the temperature of the pan 12. The cooling means 20 cools the circuit board 16 and is constituted by a fan motor in which a fan is attached to a rotor of a DC brushless motor.

  The operation and action of the above configuration will be described. When rice and water are cast in the pan 12 and the operation is started, the microcomputer controls the semiconductor element mounted on the circuit board 16 based on a predetermined course, and the pan 12 is induction-heated by the first heating coil 10. At the same time, the lid heating plate 14 disposed on the lid 8 is induction-heated by the second heating coil 15 to perform the rice cooking step and the heat retaining step.

  Here, by using the electronic component unit 17 shown in the first embodiment, the vertical vibration and the horizontal vibration of the crystal resonator 5 can be suppressed. Can be prevented. For example, in the rice cooker of the present embodiment, the electronic component unit 17 is mounted on the lid 8, but it is possible to prevent the lead wire of the crystal unit 5 from being broken due to vibration caused by opening and closing of the lid 8. . In addition, it is possible to prevent the lead wire of the crystal unit 5 from being broken by the vibration of the car during delivery. Moreover, since the fixing means 3 is diverted, the cost and mounting time of the adhesive can be shortened, and a low-cost rice cooker with few failures can be realized.

  As mentioned above, in this Embodiment, the pan 12 is detachably accommodated in the rice cooker main body 7, this pan 12 is heated with the 1st heating coil 10, and the upper surface opening part of the rice cooker main body 7 is used. Since the electronic component unit 17 described in the first embodiment is attached to the lid 8 so as to be freely opened and closed by the lid 8, it is possible to cope with various operation shapes by configuring the display operation unit with the electronic component unit 17. Can provide a rice cooker with high design. Further, by providing the battery 4 in the operation display unit having a low ambient temperature, the life of the battery 4 can be extended.

  In addition, in this Embodiment, although the electronic component unit 17 is attached to the lid | cover 8, you may attach using the effective space in the rice cooker main body 7, and can acquire the same effect | action and effect.

  As described above, since the electronic component unit according to the present invention can prevent disconnection of the lead wire of the crystal resonator, an electronic component unit with few failures can be provided, and various rice cookers equipped with this electronic component unit can be provided. Since it can respond to various operation shapes and can provide a high-design rice cooker, it is useful as an electronic component unit having a can-case type crystal resonator and a rice cooker including the electronic component unit .

Sectional drawing of the principal part of the electronic component unit in Embodiment 1 of this invention Top view of the electronic component unit Sectional view of the electronic component unit Bottom view of the electronic component unit Sectional drawing of the rice cooker in Embodiment 2 of this invention.

DESCRIPTION OF SYMBOLS 1 Board | substrate 2 Display means 3 Fixing means 5 Crystal oscillator 22 Projection part 23 Microcomputer (time measuring means)

Claims (3)

Fixing means for fixing display means for performing a display operation and attaching the display means to a substrate, a crystal resonator mounted on the substrate and constituting an oscillation circuit, timing means for reading the oscillation frequency of the oscillation circuit and timing, and a power source for the timing means comprising a battery serving as the fixing means is formed of a resin material, towards the substrate is projected two projections, and configured to support the crystal oscillator in the substrate and the two protrusions, the An electronic component unit in which an extending part is arranged at a position lower than the length of the terminal part of the battery at the upper part of the battery . The electronic component unit according to claim 1 , further comprising: a switch mounted on a substrate, wherein the fixing unit includes an operation unit that presses the switch. 3. The electronic component according to claim 1, wherein the pan is detachably stored in the rice cooker body, heating means for heating the pan, a lid that covers the upper surface opening of the rice cooker body so as to be openable and closable. A rice cooker having the electronic component unit attached to the rice cooker body or lid.