JPH0623062Y2 - Lead of crystal unit - Google Patents

Description

Detailed Description of the Invention A. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crystal unit lead supporting one end of a unit piece made of crystal.

B. SUMMARY OF THE INVENTION The present invention relates to a crystal resonator lead, which comprises a head having a recess for fitting a crystal oscillator piece, and a lead portion which is integrally formed with the head and is hermetically inserted into a holder base. By forming a reservoir for accumulating the insulating adhesive in the recess, the insulating adhesive covers the entire head and the conductive adhesive prevents the conduction between the electrode film on the surface of the vibrator piece and the head. This prevents the vibration characteristics from changing due to sticking to the vibrator piece.

C. 2. Description of the Related Art Concerning a crystal resonator by fixing a crystal element to a holder base, various configurations are conceivable for fixing the crystal element to the holder base.

As one of them, there is a crystal resonator having the configuration shown in FIGS. 3 and 4. FIG. 3 is a configuration diagram of the crystal oscillator, and FIG. 4 is an enlarged partial view showing a connecting portion between the oscillator piece 5 and the head 1 of the lead 3. This crystal unit includes a lead portion 2 of a pair of leads 3 including a head portion 1 having a recess 1a and a lead portion 2.
Airtightly penetrates through the holder base 4 so that both leads 3
One end of the vibrator piece 5 is fitted into the concave portion 1a of the head 1 and the liquid insulating adhesive (not shown in FIG. 3) is applied to the head 1 and the vibrator piece 5.
After that, the vibrator piece 5 is fixed to the head 1 by solidifying the insulating adhesive by, for example, heating after pouring it into the gap, and it is preformed on both sides of the vibrator piece 5 and mutually staggered. At the position, the electrode film 6 extending toward the head 1 of the separate lead 3 and the head 1 of the lead 3 are electrically connected by a conductive adhesive (not shown in FIG. 3), and the holder The base 4 is airtightly covered with a cap 7. In this way, one end of the vibrator piece 5 is fixed to the head 1 of the lead 3 via the insulating adhesive, and the electrode films 6 formed on both sides of the vibrator piece 5 are connected to the lead via the conductive adhesive. Head 3
Is electrically connected to.

By the way, if the injection amount of the insulating adhesive is small, the vibrator piece 5
In general, the amount of injection is increased and the amount of injection is increased to flow above the holder base 4, and the vibrator piece 5, the head 1 and the holder base 4 are integrally bonded. Regarding this adhesion, since the head 1 and the electrode film 6 can be electrically connected by the conductive adhesive 9 used thereafter, the insulating adhesive 8 does not cover the upper part of the head 1. Adjust the injection volume so that Since the insulating adhesive 8 flows on the holder base in a different manner depending on the unevenness of the upper surface of the holder base 4, the insulating property is also provided in terms of preventing defective fixing due to insufficient adhesive due to such a situation. The injection amount of the adhesive 8 tends to be large.

D. The problem to be solved by the invention is that, depending on the amount of the insulating adhesive or the holder base state, the insulating adhesive may fill up between the transducer piece and the head of the lead, and rise up. As shown in FIGS. 5 (a) and 5 (b), the entire head 1 of the lead 3 is covered and the head 1 and the electrode film 6 are electrically connected via a conductive adhesive. Is impossible, resulting in a defective product.

Since the insulating adhesive is transparent, it is difficult to tell that the entire head of the lead has been covered with the insulating adhesive, which is also a troublesome problem. Moreover, since the total length L of the vibrator piece 5 shown in FIG. 3 is generally 7 mm or less and is extremely small, the injection amount of the insulating adhesive is very small, and the injection amount is adjusted and the entire lead head is insulative. It is very difficult to find that it is covered with adhesive. Furthermore, when the manufacturing process of the crystal unit is automated, the manufacturing is performed continuously, so it is more difficult to find it in the middle of the process, and a large number of defective products can be found after the product is completed. Cause reasonable problems.

Further, as shown in FIG. 6, although the upper portion of the head 1 is exposed, when the rising amount of the insulating adhesive 8 along the vibrator piece 5 increases and the rising dimension from the head 1 becomes excessive, vibration occurs. There is also a problem that the vibration of the child piece 5 is suppressed by the adhesion of the insulating adhesive 8 and the vibration characteristics of the crystal resonator are adversely affected. In particular, the smaller the resonator piece, the greater the adverse effect.

In order to solve these problems, it is only necessary to properly adjust the injection amount of the insulating adhesive, but the appropriate injection amount is small because the vibrator piece is small, and therefore it is difficult to adjust the injection amount.

Therefore, an object of the present invention is to provide a lead of a crystal unit that solves such a problem.

E. Means for Solving the Problems The structure of the present invention for achieving the object is a head having a recess for fitting one end of an oscillator piece made of crystal, and a head integrally formed with the head. And a lead part that is hermetically penetrated through the holder base, and the vibrator piece and the head are joined by an insulating adhesive and the electrode film formed on the surface of the vibrator piece and the head. In the lead of the crystal unit, which is connected to the portion by a conductive adhesive, a reservoir portion in which the insulating adhesive is retained is formed in the recess.

F. Action Insert one end of the vibrator piece into the recess formed in the head of the pair of leads, and inject the insulating adhesive between the head of the lead and the vibrator piece. It flows into the reservoir formed in the so as to be sucked. Therefore, even if the injection amount of the insulating adhesive is too large to some extent, the insulating adhesive will immediately cover the entire head of the lead, and will rise above the head of the lead. It will not cover the lower part of the body too much. Therefore, the injection amount of the insulating adhesive can be easily adjusted.

G. Embodiment Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. Since the present embodiment is an improvement of a part of the leads of the conventional crystal resonator, the same parts are designated by the same reference numerals, and the description thereof will be omitted. Only different parts will be described.

2 (a), (b), and (c) are all leads (front view) of the crystal unit. Lead 3 shown in FIG. 2 (a)
Shows a step 10 as a reservoir provided inside the recess 1a formed in the head 1. The lead 3 shown in FIG. 2 (b) is provided on both insides of the recess 1a. A hollow 11 is provided as a reservoir in the middle of the height direction.
In FIG. 2 (c), a recess 12 larger than the former two is provided as a reservoir in the lower inside of the recess 1a.

The lead portion 2 of each of the leads 3 is hermetically penetrated through the holder base, and one end of the vibrator piece 5 is fitted into the recess 1a of the head 1 to insulate between the vibrator piece 5 and the head 1. When the adhesive 8 is injected, the insulating adhesive 8 has steps 10, depressions 1
Since it flows into 1 and 12 so as to be sucked, the head 1 of the lead 3 is covered and the vibrator piece 5
It is possible to prevent excessive climbing along the road. Also, since the appropriate amount of insulative adhesive 8 to be injected is larger than in the conventional case, the influence of the error in the injection amount is smaller than that in the case of a conventional small amount, and the injection amount is adjusted so as not to easily cause an excessive injection amount. it can. Therefore, as shown in FIGS. 1 (a), (b), and (c) corresponding to FIGS. 2 (a), (b), and (c), the insulating adhesive 8 is applied to the lead 3. The head 3 of the lead 3 should be covered with the vibrator element 5 in a good state such that it does not cover the entire head 1 or rise above the head 1 excessively along the surface of the vibrator element 5. One end can be fixed.

In this embodiment, three types of leads are shown by forming a reservoir in the recess formed in the head of the lead, but the lead is not limited to these leads, and leads of various other shapes may be used. Conceivable.

H. Effect of the Invention As described above, since the lead of the crystal unit according to the present invention has the reservoir formed in the recess of the head, the insulating adhesive injected between the oscillator and the head is sucked into the reservoir. Therefore, the injection amount can be easily adjusted, and the insulating adhesive does not cover the entire head portion of the lead or go up above the head portion along the vibrator piece.

Therefore, the electrical connection between the vibrator element and the head of the lead with the conductive adhesive may be defective, or the insulating adhesive may hang up from the bottom of the vibrator element and cover the vibrator element. It is possible to prevent the vibration characteristics of the crystal unit from changing.

[Brief description of drawings]

1 and 2 relate to an embodiment of a crystal resonator lead according to the present invention, and FIGS. 1 (a), (b), and (c) show a vibrator piece fixed to the head of three types of leads. Figure 2
(a), (b), (c) are front views showing three types of leads, FIGS. 3 to 6 relate to leads of a conventional crystal unit, FIG. 3 is a configuration diagram of the crystal unit, FIG. 4 is a partial view showing a connecting portion between the vibrator piece and the head of the lead, and FIGS. 5 and 6 show a connecting portion between the vibrator and the head of the lead which are not properly connected.
FIG. 5 (a) is a partial view showing a state in which the entire head of the lead is covered with an insulating adhesive, FIG. 5 (b) is a left side view of FIG. 5 (a),
FIG. 6 is a partial view showing a state in which the insulating adhesive is excessively raised along the vibrator piece. 1 ... Head, 1a ... Recess, 2 ... Lead, 3 ... Lead, 4 ... Holder base, 5 ... Transducer piece, 6 ...
Electrode film, 8 ... Insulating adhesive, 9 ... Conductive adhesive, 1
0 ... step, 11, 12 ... depression.

Claims (1)

[Scope of utility model registration request] 1. A head portion having a recess for fitting one end of an oscillator piece made of crystal, and a lead portion formed integrally with the head portion and airtightly penetrating a holder base, In a lead of a crystal resonator, wherein the vibrator piece and the head are connected by an insulating adhesive, and the electrode film formed on the surface of the vibrator piece and the head are connected by a conductive adhesive. A lead of a crystal unit, wherein a recess for accommodating an insulating adhesive is formed in the recess.