JPS62152207A - Method for holding crystal resonator - Google Patents

Abstract

PURPOSE:To use the crystal resonator as a highly sensitive sensor by supporting the crystal resonator in an exposed way so as to contact a medium and applying coating to provide the durability to the medium thereby withstanding sufficiently the contact by the medium. CONSTITUTION:The crystal resonator 1 is formed as a deformed hexagon in which part of a parallel face is increased. Part of thin film electrodes 2a, 2b is prolonged to the reached to the end of the other side of the crystal resonator 1 as feeding parts 3a, 3b and the electrodes are supported by plural conductive clip pins 4 and the connection terminal to connect the crystal resonator 1 to the power supply for the clip pins 4 in contact with the feeding parts is provided. Then the crystal resonator 1 is formed to a shape in contact with a medium such as gas, liquid or solid and fitted to a case 8.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for holding a crystal resonator.
In particular, the present invention provides a completely new holding method for using the crystal resonator, which has been conventionally used as a reference element in a transmitter, as a sensor.

[Prior Art 1] A conventional crystal resonator is housed in a sealed case in order to prevent it from being affected by outside air as much as possible in order to use it as a reference for the oscillation frequency of a transmitter.

However, the conventional method of holding a crystal resonator was not originally designed for use as a sensor, and therefore, even if a hole is made in the sealed case, the Even if a crystal oscillator was made to come into direct contact with a gas, liquid, or solid medium, it was still unsatisfactory in terms of performance and durability.

[Means for Solving the Problems 1] In the present invention, as a specific means for solving the above-mentioned problems, the unique Fj! In a method for holding a crystal resonator having dynamic characteristics, the crystal resonator has a flat hexagonal shape with at least a portion of which has large parallel surfaces, and thin film electrodes are provided on both sides of the parallel surfaces. each of the electrodes is partially extended to reach an end on the opposite side of the crystal resonator to form a power feeding section, and the power feeding section is formed in a shape to sandwich the crystal resonator. The crystal resonator is held by a plurality of conductive clip pins, and a connection terminal for connecting the crystal resonator to a power source is provided on the clip pin that contacts the power supply part. The crystal oscillator is attached to a case formed in a shape that allows it to come into contact with media such as gas, liquid, and solid.By providing a method for holding the crystal oscillator, it can be used as a sensor. This method solves the above-mentioned conventional problems as an optimal method for holding a crystal resonator.

[Example] Next, the present invention will be described in detail based on an example shown in the drawings.

The quartz crystal resonator indicated by the reference numeral 1 in FIG. 1 is cut into a flat hexagonal shape as described above and has a unique frequency. On both surfaces of this crystal resonator 1,
The electrodes 2a, 2b are provided by a method such as depositing a conductive metal, and a part of the electrodes 2a, 2b is extended to the end of the crystal resonator 1, respectively, to form a power feeding section 3a, 3b.
In this case, the power supply parts 3a and 3b are IY
It is preferable from the viewpoint of maintenance balance that the electrodes 2 and 4 are provided at the opposite end of the crystal resonator 1.
The completed sensor can be made transparent by forming transparent electrodes a and 2b made of ITO or tin oxide called Nesa film. The ends of the crystal resonator 1 thus formed are attached with clip pins 4 made of conductive metal or the like in a shape that holds the crystal resonator 1 therebetween, and if necessary, a resin-based adhesive 9a is attached. , or supported using a conductive adhesive 9b. At this time, it is preferable to support the crystal resonator 1 at a plurality of locations so that the crystal resonator 1 is stabilized. A leg member 5 made of a lead frame or the like is attached to the clip pin 4 by an appropriate means such as spot welding, and is fixed to the substrate 6. At this time, a high frequency current is applied to the clip pins in contact with the power supply parts 3a and 3b by a transmitter (not shown) J using the leg members 5 as connection terminals. and said crystal oscillator 1
vibrate. What is shown in FIG. 2 is an example in which the present invention is used in a so-called touch switch, and as explained above, a light emitting module using a light emitting diode or the like is installed below the crystal resonator 1 held on the substrate 6. In order to efficiently utilize the light of this light emitting module in which the light emitting module 7 is provided, it is more effective if the electrodes 2a and 2b are made of transparent materials as described above. Furthermore, a cover 8 is provided above the crystal resonator 1 so as to cover the crystal resonator.
4 times. This cover 8 is provided with an opening 8a and a guide frame 8b at appropriate positions, so that when the crystal resonator 1 is covered, the position of the crystal resonator 1 is regulated by the guide frame, and the opening 8a and a guide frame 8b are provided at appropriate positions. 8a to the crystal resonator 1
is exposed in the correct position. The one assembled in J and uni in the above explanation is a so-called Kudge switch, and normally the crystal oscillator vibrates due to the applied high frequency current. When touched, the vibration of the crystal resonator 1 is stopped, and the touch is detected.

At this time, if the electrodes 2a and 2b are not transparent as described above, the crystal oscillator 1 is also transparent, so the light emitting module 7 can be directly observed. It would be even more practical if characters or symbols indicating the purpose of the switch were written on it. Note that if the film thickness of the electrodes 2a and 2b in +'+ij is too thick, it will interfere with the vibration of the crystal resonator 1, so it is preferable to make them as thin as possible. Therefore, at least the power supply parts 2a, 2b and the power supply parts 3a, 3b are coated for protection.

[Effects of the Invention] As explained in detail above, according to the present invention, the crystal resonator is exposed and supported so as to come into contact with the medium, and furthermore, a coating is applied to make it durable against the medium. As a result, it can withstand contact with media, making it possible to use the crystal oscillator as a highly sensitive sensor, and has excellent detection ability for detecting gases, liquids, and solids. This provides an unprecedented and excellent effect of providing a sensor.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing essential parts of the present invention, and FIG. 2 is an exploded perspective view of a touch switch that is a specific embodiment of the present invention.

Claims (3)

[Claims] (1) In a method for holding a crystal resonator that is cut to a predetermined size at a predetermined angle with respect to the crystal axis and has unique vibration characteristics, at least a portion of the crystal resonator has large parallel surfaces. The crystal oscillator has a flat hexagonal shape, and thin-film electrodes are disposed on both sides of the parallel planes, with a part of each electrode reaching the opposite end of the crystal oscillator. It is extended to form a power supply section, and the power supply section is held by a plurality of conductive clip pins formed in a shape to sandwich the crystal resonator, and the clip pins in contact with the power supply section are connected to the crystal resonator. A connection terminal is provided for connecting the crystal resonator to a power source, and the crystal resonator is attached to a case formed in a shape that allows it to come into contact with a medium such as a gas, liquid, or solid. How to hold a crystal unit. (2) The method for holding a crystal resonator according to claim (1), wherein a protective film is formed on at least the electrode and the power supply section. (3) The method for holding a crystal resonator according to claim (1), wherein the electrode and the protective film are formed using a transparent member.