JPH04107919U - Crystal oscillator - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent frequency changes due to impact on the crystal resonator. [Structure] A supporter for holding both ends of a crystal piece was constructed by providing a Y-shaped groove consisting of a base and a branch, and further providing notches on both sides of the base.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is applied to crystal resonators, and in particular, the main surface of the crystal piece is opposed to the metal base. Concerning supporters.

0002

[Background of the idea]

Because crystal resonators have excellent resonance characteristics, they can be used in various electronic devices to It is useful as a reference source between In recent years, along with miniaturization, communication conditions have improved. etc., the frequency deviation becomes even more severe, and a more sophisticated one is desired.

0003

[Prior art]

FIGS. 3 to 5 are diagrams illustrating conventional examples. In addition, Figure 3 shows the crystal oscillator. A sectional view, FIG. 4 is a view of the supporter, and FIG. 5 is a view of the crystal piece. The crystal resonator is constructed by hermetically sealing a crystal piece 2 in a metal container 1. metal container 1 consists of a metal base 3 and a metal cover 4, and the flange portion 5 (ab) of both is resistive. Welded and sealed. The metal base 3 has a pair of lead wires 6 (ab) connected to the glass part 7. Protrudes through insulation. The protruding part of the lead wire 6 (ab) has a flat plate (metal plate). Supporter 8 (ab) is attached. The supporter 8 (ab) has one end connected to the lead wire 6 (ab), and attach both ends of the crystal piece 2 to the other end where the stepped portion 9 is formed. Connect electrically and mechanically. Crystal blank 2 is an AT-cut rectangular shape and is excited on both principal surfaces. It has an electrode pair 10, and extraction electrodes 11 extend to the outer periphery of both ends.

0004

[Problems with conventional technology]

However, in the above configuration, the resistance melting between the metal base 3 and the metal cover 4 is For example, as shown in FIG. 6, the metal base 3 may be If the crystal blank 2 is deformed vertically, the crystal blank 2 is strained via the supporter 8 (ab). However, Therefore, there was a problem that the oscillation frequency changed before and after sealing due to stress sensitivity characteristics, etc. . For this reason, as shown in FIGS. 7 and 8, for example, the supporter 8 A rectangular penetrating groove 12 is provided in the center, or cutouts 13 (ab) are provided on both sides, Some attempts have been made to provide flexibility to absorb shock during resistance welding. However, this In both cases, the connection part is straight, so the shock absorption efficiency is poor. There was a problem.

[0005]

[Purpose of invention]

The purpose of this invention is to provide a crystal resonator that prevents frequency changes due to impact. shall be.

[0006]

[Solution]

This invention consists of a branch located at one end of the supporter and a base located at the other end. The problem was solved by providing a Y-shaped groove and further providing notches on both sides of the base. Use as a means. An embodiment of the present invention will be described below.

[0007]

【Example】

Figure 1 shows a set of supports, which are the main parts of a crystal resonator, explaining one embodiment of the present invention. This is a diagram. Note that the description of the same parts as those in the previous conventional example diagram will be simplified.

[0008] As described above, the crystal resonator is placed in a metal container 1 sealed by resistance welding with a crystal piece 2. Consists of a hermetically sealed package. The crystal piece 2 is a pair of supports that form the main part of this invention. 13 (ab) (see FIG. 3 above). Supporter 14 (ab) is gold It is made by pressing a metal flat plate, and has a roughly Y-shape consisting of a base 15 and a branch 16 (ab). Further, notches 18 (ab) are provided on both sides of the base 15. And minutes The central part of one end, which is the branch side, is the joint part 19, and the other end, which is the base part, is the stepped part 20. will be established. Note that the arc-shaped portion protruding between the Y-shaped branches is referred to as a tongue piece 21, The portion from the joining portion 19 to the other end along the periphery of the Y-shape is defined as a connecting portion 22 (ab). Note that the shaded part in the figure is the welded part 19, which is approximately the wire diameter of the lead wire. And each support The outer periphery of both ends of the crystal piece 2 is electrically connected to the stepped portion 20 of the meter 14 (ab) using a conductive adhesive. The structure shall be physically and mechanically connected.

[0009] In such a device, the groove 17 of the supporter 14 (ab) is formed into a Y-shape, and the side surface of the groove 17 is formed into a Y-shape. Since the notch 18(ab) is provided in You can make it bigger. Therefore, by increasing the buffering effect of the supporter 14 (ab), It absorbs the deformation of the metal base during contact and prevents the oscillation frequency from changing. Ru. In addition, since the joint part 19 is made larger than the diameter of the lead wire by the tongue piece 21, the joint part 19 is made larger than the diameter of the lead wire. The combined strength can be increased.

0010

[Other matters]

In addition, in the above embodiment, the joint portion 19 in the supporter 14 (ab) has a Y-shape. The tongue piece 21 protruding between the branches is made larger than the diameter of the lead wire, for example, It is also possible to have tongue pieces 21 (ab) protruding from both sides as shown in Figure 2. Ru.

[0011]

[Effect of the idea]

This invention consists of a branch located at one end of the supporter and a base located at the other end. A Y-shaped groove is provided, and cutouts are provided on both sides of the base, so it is resistant to impact. It is possible to provide a crystal resonator that prevents frequency changes due to

[0011]

[Brief explanation of drawings]

FIG. 1 is a plan view of a set of supports for a crystal resonator, illustrating an embodiment of the present invention.

FIG. 2 is a plan view of one supporter illustrating another embodiment of the present invention.

FIG. 3 is a cross-sectional view of a crystal resonator explaining a conventional example.

FIG. 4 is a diagram of a supporter explaining a conventional example.

FIG. 5 is a diagram of a crystal piece explaining a conventional example.

FIG. 6 is a diagram of a metal base illustrating a conventional drawback.

FIG. 7 is a diagram of a supporter explaining another conventional example.

FIG. 8 is a diagram of a supporter explaining another conventional example.

[Explanation of symbols]

14 Supporter, 15 Base, 16 Branch, 17 Groove,
19 Joint part

Claims (1)

[Scope of utility model registration request] Claim 1: One end of a flat supporter is connected to a pair of lead wires protruding from a metal base, the other end is extended in a direction separating from each other, and a stepped portion provided at the other end is provided with a crystal. In a crystal resonator in which both ends of the piece are electrically and mechanically connected and the crystal piece is held horizontally on the metal base, a branch located on one end side of the supporter and a branch located on the other end side of the supporter. 1. A crystal resonator, characterized in that a Y-shaped groove is formed from a base, and notches are provided on both sides of the base.