JPS62152208A - Method for holding crystal resonator - Google Patents

Abstract

PURPOSE:To use a crystal resonator as a highly sensitive sensor by supporting the crystal resonator so as to be exposed to a medium and applying coating so as to attain the durability against the medium. CONSTITUTION:The crystal resonator 1 is formed as a deformed hexagon whose parallel face is increased partly and thin film electrodes 2a, 2b are arranged to both parallel faces. Part of the electrodes 2a, 2b is prolonged to form feeding parts, which are fixed to a conductive adhesives or a resin group adhesives to the inner wall face of a hole 4a formed to a crystal support substrate 4 in nearly the same shape as that of the crystal resonator 1. Then an electrode 5 made of a conductive member is provided to the inner wall face of the hole 4a so as to clip the crystal holding substrate 4 to form the feeding part. The crystal resonator 1 is fitted to a case having an opening in contact with a medium such as gas, liquid or solid.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for holding a crystal oscillator, and particularly relates to a method for holding a crystal oscillator, which has been conventionally used as a reference element of a transmitter. This provides an entirely new holding method for use as a sensor.

[Conventional technology 1] Conventional crystal oscillators are built in a case that is closely sealed to prevent the influence of the outside air from being affected by G-1 as much as possible in order to use it as a reference for the oscillation frequency of all the oscillators. It was enclosed.

[Problems to be Solved by the Invention] 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 the crystal camera was made to come into direct contact with a gas, liquid, or solid medium, the performance and durability would still be insufficient.

Means for Solving Problem F] In the present invention, as a specific means for solving the above-mentioned problems, the crystal is cut to a predetermined size at a predetermined angle with respect to the crystal axis (vibration characteristics of 2II). In this method, at least a part of the crystal oscillator t has a flat hexagonal shape with large parallel surfaces, and thin film electrodes are disposed on both sides of the parallel surfaces. and a portion of each of the electrodes is extended to the opposite end of the crystal sensor to serve as a power supply section, and the power supply section is substantially the same as the crystal sensor. A hole portion of the crystal holding U plate that is fixed to the inner wall surface of a hole formed in the crystal holding substrate with a resin adhesive or a conductive adhesive, and that corresponds to at least the nfI power supply section. An electrode made of a conductive member is provided on the inner wall surface of the crystal holding substrate so as to sandwich the crystal holding substrate, and serves as a power supply part, and the crystal sensor can be connected to a medium such as a gas, a liquid, or a solid. By providing a method for holding a crystal oscillator, which is characterized by being attached to a case with an opening formed therein, the method for holding a crystal oscillator is ideal for use as a sensor, and solves the above-mentioned conventional problems. This is to solve the problem.

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

The reference numeral 1 in FIG. 1 is a quartz crystal sensor, which is cut into a flat hexagonal shape and has a unique frequency as described above. On both surfaces of this crystal resonator 1,
Electrodes 2a, 2b are provided by a method such as vapor deposition of conductive metal, and a portion 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, it is preferable to provide the power supply parts 3a and 3b at opposite ends of the crystal resonator 1 from the viewpoint of maintaining balance.
It is possible to make the 1ζ sensor transparent by forming it with a transparent electrode made of ITO or tin oxide, which is called Nesa film. The end portion of the crystal camera element 1 formed in this way is formed using an insulating member such as phenol resin, and is attached to a crystal holder provided in approximately the same shape as the crystal resonator. It is removed into the hole 4a of the substrate 4 with adhesive or the like. At this time, the hole 4
By widening the diameter of the hole on the upper side, that is, on the side when operating as the I5 sensor, positioning when installing the crystal resonator 1 is facilitated, and, for example, contact with the medium can be prevented. It can also be made durable against pressure. Note that the power supply section 3 installed in the crystal resonator 1
An electric conductor 8i5 formed to sandwich the crystal holding substrate 4 with a conductive member, for example, a phosphor bronze plate, is disposed on the inner wall surface of the hole 4a at positions corresponding to points a and 3b, respectively.
Furthermore, an electrode bin 6 for supplying a high frequency current from an oscillator (not shown) to the crystal resonator 1 is provided as shown. When connecting this electrode 5 to the power supply parts 3a and 3b provided on the crystal resonator 1, a conductive adhesive is used instead of the resin-based adhesive described above.

The item shown in Fig. 2 is an example in which the present invention is used in a so-called touch switch, in which a light emitting diode or the like is installed below the crystal resonator 1 held on the J: sea urchin crystal holding substrate 4 described above. In order to efficiently utilize the light of this light emitting module 7 in which the used light emitting unit 7 is disposed, it is more effective if the electrodes 2a and 2b are transparent as described above.

A protective plate 8 made of a transparent resin film, transparent silicone rubber, etc. is provided above the crystal resonator 1 so as to cover the crystal resonator 1, and further to cover all of the above. , is sealed with a case 9 made of resin or the like and a back cover 10. An opening 9a is provided on the surface of the case 9 at a position corresponding to the crystal oscillator 1, so that the crystal oscillator 1 is exposed through the opening 9a at a correct position through the protective plate 8. It is made to be.

The device assembled as described above is a so-called touch switch, and normally the crystal oscillator 1 moves lfi by the applied high-frequency current. Moe distribution crystal oscillator 1 by touching
stops vibrating to detect the contact. At this time, if the FFs 12a and 2b are transparent as explained above, the crystal resonator "1 is also transparent, so the light emitting module 7 can be directly observed. For example, the light emitting module 7 can be directly observed. Practicality can be further improved by writing letters or symbols indicating the purpose of the switch on the surface.Incidentally, if the film is thicker than the electrodes 2a and 2bG described above, the crystal 1 It is preferable to make it as thin as possible since it will hinder the vibration of the Tatsuchokushi 1.
As a result, there is a possibility that the durability will be inferior, so at least
Coating for C1,i is carried out on b.
Further, when the coating sufficiently guarantees durability, the protection plate 8 may be omitted.

[Effects of the Invention] As explained in detail above, according to the present invention, a crystal resonator is exposed and supported via a protective plate or a protective plate that is involved in a medium, and furthermore, J: By applying a sea urchin coating, it can withstand the melting of media, making it possible to use the crystal oscillator as a highly sensitive sensor. Hata et al. have achieved an unprecedented and excellent effect of being able to provide a sensor with excellent detection ability for detecting liquids or solids.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing essential parts of the present invention, and FIG. 2 is an exploded perspective view showing a touch switch that is a specific embodiment of the present invention. 1...Crystal resonator 2a, 2b...Electrodes 3a, 3b...Power supply part 4...Crystal holding substrate 4a...Hole part 5...Electrode pin 7... Light emitting module 8... Protective plate 9... Case 9a... Opening 10
...Back cover Wf applicant Stanley Electric Co., Ltd. Figure 1

Claims (4)

[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. The power supply section is extended to form a power supply section, and the power supply section is fixed to the inner wall surface of a hole formed in the crystal holding substrate in substantially the same shape as the crystal resonator using a resin adhesive or a conductive adhesive. an electrode made of a conductive member is provided on an inner wall surface of a hole of the crystal holding substrate corresponding to at least the power feeding section so as to sandwich the crystal holding substrate, and is connected to the power feeding section; A method for holding a crystal resonator, characterized in that the crystal resonator is attached to a case formed with an opening that can interact with a medium such as a gas, a liquid, or a solid. (2) The inner wall surface of the hole provided in the crystal holding substrate is wide open on the side that is involved in the medium, so that the hole has a substantially funnel shape. A method for holding a crystal resonator as described in scope (1). (3) The method for holding a crystal resonator according to claim (1), wherein a protective film is formed on at least the electrodes and the power supply section. (4) The method for holding a crystal resonator according to claim (1), wherein the electrode and the protective film are formed using a transparent member.