JPH09219631A - Vibrator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide higher shock resistance than that of a conventional vibrator by adopting a flexible structure with respect to impact in every direction for an inner lead of this vibrator. SOLUTION: A vibrator chip 7 is soldered to a pad 5 of an inner lead 8 and a thin plate spring is made up of a longitudinal spring 9 and a lateral spring 10. The lead is hermetic-sealed to a header 1 and consists of the inner lead 8 and an outer lead 2 to form airtight terminals. When impact in a direction of the arrow is exerted to the lead 8, the spring 9 is bent and the lead 8 is deformed as shown by broken lines. Even when impact in an opposite direction to the arrow is exerted to the lead 8, the lead is also deformed. Furthermore, when impact in a direction perpendicular to the arrow is exerted to the lead 8, the spring 10 is bent and the lead 8 is easily deformed. When impact in a direction perpendicular to this paper is exerted to the vibrator chip 7, the leads are deformed in a way that one lead is extended and the other lead is contracted. Thus, the vibrator 7 sufficiently withstands a shock in directions that a conventional vibrator can't withstand.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a vibrator.

[0002]

2. Description of the Related Art Various shapes of inner leads of an airtight terminal for supporting a resonator element of a vibrator are known. In particular, many inner leads are flattened in order to improve the shock resistance of the vibrator. Further, there is also one in which a pad portion for fixing the vibrating reed and a flat portion as a spring for absorbing a shock have different functions by forming a step. This has stable impact resistance because the spring length does not change even if the vibrating element is fixed with some displacement.

FIG. 1 shows a side surface of a vibrator supported by an inner lead shape according to the prior art. The vibrating piece 7 is joined and supported by soldering to the pad portion 5 of the inner lead 4 of the airtight terminal 3 formed of the header 1, the outer lead 2, the inner lead 4, and the insulating member (not shown). In FIG. 1, the inner lead 4 and the outer lead 2 are 1
Only books can be seen, but in reality, there are two in the direction perpendicular to the paper surface.

When a force acts on the vibrating piece 7 in the left and right directions in the figure,
The flat portion 6 of the inner lead 4 bends as a spring to absorb the force. Therefore, the shock resistance of the vibrator is improved. Also,
In FIG. 1, since there is a step between the flat portion 6 serving as a spring and the pad portion 5 supporting the vibrating piece 7, even if the vibrating piece 7 is slightly displaced up and down on the paper surface, the spring length of the flat portion 6 is reduced. Has no impact and has stable impact resistance.

[0005]

As shown in FIG. 1, the conventional inner lead shape is such that the flat portion 6 acts as a spring only when the force is applied to the vibrating piece 7 in the left-right direction on the paper surface. Then, when a vertical force or a vertical force is applied, it is stiff. Therefore, the top and bottom of the paper,
When a large force acts in the vertical direction, an unreasonable force acts on the crystal piece 7. Since the vibrating piece 7 itself has strength against the force in the vertical direction and the vertical direction on the paper surface as compared with the lateral direction, it is not a problem because it is not damaged in the standard up to now.

At present, vibrators used in equipment such as mobile communication and PHS that require high impact resistance are required to have impact resistance stricter than the standards up to now. That is,
There is a need for a vibrator having a support structure that is flexible against vertical and vertical forces on the paper.

[0007]

In order to solve the above-mentioned problems, according to the present invention, in a vibrator in which a vibrating element is supported by two leads, each of the two leads supporting the vibrating element is A pad portion for supporting and joining the vibrating piece, and a thin plate-shaped spring portion continuous to the pad portion, and when the surface including the center of the thickness of the vibrating piece is the vibrating piece center plane,
The thin plate-shaped spring part is soft when a force is applied to the vibrating piece in the direction perpendicular to the center plane of the vibrating piece, and the lateral spring part is soft when a force is applied to the vibrating piece along the center plane of the vibrating piece. And a vertical spring part that is.

Further, when the surface including the center of the thickness of the spring portion of each of the two leads supporting the vibrating piece is a spring thickness surface, the spring thickness surface of the lateral spring portion is substantially parallel to the center surface of the vibrating piece. The spring thickness surface of the vertical spring portion is continuous with the spring thickness surface of the horizontal spring portion, and is inclined at an angle with the center plane of the vibrating piece.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIGS. 2 is a side view of the vibrator, and FIG. 3 is an enlarged view and side view of the inner lead portion.

In FIG. 2, the resonator element 7 is soldered to the pad portion 5 of the inner lead 8, and the thin plate-shaped spring portion is composed of a vertical spring portion 9 and a horizontal spring portion 10. The leads are hermetically sealed to the header 1 and are divided into inner leads 8 and outer leads 2 to form an airtight terminal 3.

FIG. 3 is an enlarged view of the inner lead portion. When a force in the direction of the arrow in the figure is applied to the inner lead drawn by the solid line, the vertical spring portion 9 bends and the inner lead is positioned at the broken line. The lead deforms. It can be deformed even if a force is applied in the direction opposite to the arrow. Even if a force is applied in a direction perpendicular to the arrow in FIG. 3, the lateral spring portion 10 is bent and the inner lead can be easily deformed. When a force is applied to the vibrating element in the direction perpendicular to the paper surface, one lead extends and one (the other) lead contracts. Therefore, the oscillator of FIG.
It can withstand a shock in a direction that a conventional vibrator cannot withstand. In the present structure, the flexibility of the spring portion may be designed by the weight of the vibrating piece and the force such as acceleration that should be endured, and the thickness, length, rigidity and the like of the spring portion can be used.

In FIG. 2, the spring portion of the inner lead is formed of a linear spring, but the shape is not limited as long as it can function as a vertical spring portion and a horizontal spring portion even if it is not a straight line.

4 and 5 show an example in which the spring portion is curved. The spring portion in FIGS. 4 and 5 cannot clearly distinguish the vertical spring portion and the horizontal spring portion, but it is clear that the spring portion has the same action as the inner lead in FIG.

[0014]

According to the present invention, since the inner lead has a structure that is flexible against forces in all directions, it is possible to give a higher impact property than the conventional vibrator.

[Brief description of drawings]

FIG. 1 is a side view of a vibrator support structure according to a conventional technique.

FIG. 2 is a side view of a vibrator support structure according to the present invention.

FIG. 3 is an enlarged side view of an inner lead.

FIG. 4 shows another embodiment of the present invention.

FIG. 5 shows another embodiment of the present invention.

[Explanation of symbols]

 1 Header 2 Outer Lead 3 Airtight Terminal 4 Inner Lead 5 Pad Part 6 Flat Part 7 Vibrating Element 8 Inner Lead 9 Vertical Spring Part 10 Horizontal Spring Part 11 Spring Part 12 Pad Part 13 Spring Part 14 Pad Part

Claims (2)

[Claims] 1. A vibrator in which a vibrating element is supported by two leads, wherein each of the two leads supporting the vibrating element has a pad portion for supporting and joining the vibrating element and a thin plate-like member continuous to the pad portion. When the surface including the center of the thickness of the vibrating piece is the vibrating piece center plane, the thin plate-shaped spring part applies a force to the vibrating piece in a direction perpendicular to the vibrating piece center plane. A vibrator comprising a horizontal spring portion which is sometimes soft and a vertical spring portion which is soft when a force is applied to the resonator element along a center plane of the resonator element. 2. When the surface including the center of the thickness of the spring portion of each of the two leads supporting the vibrating piece is a spring thickness surface,
The spring thickness surface of the horizontal spring portion is substantially parallel to the center surface of the vibrating piece, the spring thickness surface of the vertical spring portion is continuous with the spring thickness surface of the horizontal spring portion, and is inclined at an angle with the center surface of the vibrating piece. The vibrator according to claim 1, wherein