JPS6246334Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a support device for a crystal resonator.

Conventionally, as this type of support device, there has been one in which a lower end of a holding spring is attached to a circuit board, and a crystal resonator is held at the upper end of the holding spring. However, the method using retaining springs not only has a complicated structure but also a large number of parts, is not easy to manufacture and assemble, and has the drawbacks of high manufacturing costs.

SUMMARY OF THE INVENTION An object of the present invention is to provide a support device for a crystal resonator that has a simple structure, allows easy attachment of the crystal resonator, and can increase the mounting strength.

Hereinafter, embodiments of the present invention will be described based on the drawings.

Figures 1 to 3 show an example of a circuit unit in a crystal resonator, and show a circuit board 1 and a crystal resonator 2 mounted and held on the top surface of this circuit board.
and a cap 3 for sealing this crystal resonator.

First, the specific configuration of the circuit board 1 will be explained. The substrate 4 of the circuit board is formed by injection molding a synthetic resin such as polysulfon. One side of the substrate 4 (fifth and sixth
On the right side of the figure is a nearly ring-shaped cap mounting groove 5.
The opening end of the cap 3 can be fitted into this mounting groove. Further, as shown in FIGS. 4 and 5, the mounting groove 5 is provided with pattern extension portions 6 and 7 at locations (two locations in the illustrated example) on the left side of the mounting groove 5, extending across the groove. This drawer portion is provided with inclined surfaces 6a and 7a which are inclined outwardly on the upper surface.

Also, the support surface 4 on the substrate 4 surrounded by the mounting groove 5
An auxiliary protrusion 8 is bored in the center part a, and a pair of mounting tables 9 and 10 facing each other with the auxiliary protrusion 8 in between are each integrally provided. As shown in FIGS. 4 to 6, the mounting tables 9 and 10 have rectangular upper surfaces, and rectangular inclined guide surfaces 9a and 10a extend from one side (left side) of the support surfaces 4a.
It has reached this point. Further, as shown in FIGS. 3 to 6, support protrusions 11 and 12 are provided on the support surface 4a and protrude from the outside of the mounting tables 9 and 10, respectively, so as to face each other. Each of the support protrusions 11, 12 has a presser portion 11a, 12a at its upper end that extends inwardly (above the mounting table) in an inclined manner.
12a, and the outer peripheral part of the crystal resonator 2 can be inserted between the holding parts 11a, 12a and the mounting tables 9, 10. Further, the outer surfaces of the support protrusions 11 and 12 are inclined surfaces 11b and 12b. 4b and 4c (shown in the third diagram) are punch holes. 4d and 4e are protrusions for positioning the mask when forming a conductive pattern.

In addition, an IC mounting recess 13 is formed on the other side of the board 4 as shown in Figures 1, 2, 5, and 6.
Sides of IC mounting recess (two adjacent sides in the example shown)
There are continuous inclined surfaces 14 and 15 which are inclined outwardly and upwardly.

As shown in FIGS. 1, 3 and 4, a predetermined conductive pattern 16 is formed on the upper surface of the substrate 4 by vacuum deposition or a combination of sputtering and masking. Conductive patterns 17 and 1
8 reaches the support surface 4a via the inclined surfaces 6 and 7,
Furthermore, the mounting tables 9 and 10 and the support protrusions 11 and 12
The pattern coating 17 whose upper surface connects with them
a, 18a and 17b, 18b. In this example, as shown in FIG. 3, the pattern coating 17a on the upper surface of one of the mounting tables 9 and the pattern coating 18b of the presser portion 12a of one of the support protrusions 12 constitute a terminal portion for the crystal resonator. The other side of the conductive pattern 17 is electrically connected to another conductive pattern 19 as shown in FIG. The other end of the conductive pattern 18 extends from the inclined surface 15 to the inner bottom surface of the IC mounting recess 13, forming a land 18c for die bonding of the IC. One end of the conductive pattern 20 is located on the inclined surface 14.

Further, to explain the crystal resonator 2, the outer peripheral part of this crystal resonator is placed on the upper surface of the mounting tables 9 and 10 as shown in FIGS.
a and is fixed with a conductive adhesive 21. Among the electrode films 22 and 23 formed on the upper and lower surfaces of the crystal resonator 2, the lead electrode 22a of one electrode film 22 is connected to the terminal portion 18b of the conductive pattern 18 on the support protrusion 12, and the lead electrode 23a of the other electrode film 22
is the terminal portion 17a of the conductive pattern 17 on the mounting table 9.
and are electrically connected by conductive adhesive 21, respectively.

Further, the cap 3 is made of a non-conductive material such as a synthetic resin such as polysulfon. The lower end opening of the cap 3 is fitted into the mounting groove 5 as shown in Figs. 1 to 3, and adhesive is applied to the fitted part to fix it.
Maintains airtightness. In this embodiment, a metal coating 24 is formed on the inner surface of the cap 3, as shown in FIGS. 2, 3, and 4. This is to prevent this from happening. In order to prevent electrical connection between the conductive patterns 17 and 18 due to the metal coating 24, the metal coating is formed only up to a certain position from the open end surface of the cap 3.

Next, assembly will be explained.

First, the crystal resonator 2 is placed on the center left side of the substrate 4 with its flat surface facing down. crystal oscillator 2
As the vibrator is slid to the right, the upper and lower outer circumferential parts of the vibrator slide on the inclined guide surfaces 9a and 10a of the mounting tables 9 and 10, and when they finish passing through the inclined guide surfaces, they touch the upper surface of the mounting table. Pressing parts 11a, 12 of support protrusions 11, 12
It is inserted between a. When the crystal resonator advances to a predetermined position as shown in the first figure, the conductive adhesive 21 is inserted into the hole 4b as shown in the third figure.
As a result, the extraction electrode 23a of the electrode film 23 on the lower surface of the crystal resonator and the terminal portion 17a of the conductive pattern on the upper surface of the mounting table 9 are electrically connected, and the resonator is fixed. Also, the terminal portion 18b of the conductive pattern on the upper surface of the holding portion 12a and the electrode film 2 on the upper surface of the crystal resonator.
The second lead-out electrode 22a is electrically connected with the conductive adhesive 21, and the vibrator is fixed. In addition, on the extraction electrode 23a side, the upper surface of the vibrator facing it is fixed with a conductive adhesive, and on the extraction electrode 22a side, the lower surface of the vibrator facing it is made conductive using the punch hole 4c. The crystal resonator may be more stably fixed by fixing with an adhesive.

In addition, the crystal resonator 2 is mounted on the mounting tables 9, 10 and the holding part 1.
1a and 12a, if the vibrator shifts to one side and one of its outer peripheral parts comes off the mounting table, the vibrator is received by the auxiliary protrusion 8 without falling any further. It becomes easy to return the detached outer peripheral portion to the original mounting table.

Thereafter, the lower end of the cap 3 is fitted into the mounting groove 5 to attach the cap. At this time, apply adhesive to the part where the cap is inserted, if necessary. Finally, the punch holes 4b and 4c are sealed with an appropriate member.

As described above, according to the present invention, the crystal resonator slides on the inclined guide surface of the mounting table and reaches the supporting position between the mounting table and the holding part, so installation is extremely easy and it can be integrated with the substrate. The mounting strength is high because it is mounted and supported on a standard mounting table, and since the mounting table and support stand are integrally formed with the board, the structure is simple, the number of parts is small, and manufacturing is easy. It is easy to use, requires only a small space, and can reduce costs. Further, by providing the auxiliary protrusion, the crystal resonator can be inserted more easily and quickly.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway front view with the metal coating of the cap omitted, and FIG. 2 is a sectional view taken along the line of FIG. 1. FIG. 3 is an enlarged sectional view taken along the line in FIG. 2, FIG. 4 is an enlarged sectional view taken along the line in FIG. FIG. 6 is a sectional view taken along the line of FIG. 1... Circuit board, 2... Crystal resonator, 4... Substrate, 8... Auxiliary protrusion, 9, 10... Mounting table, 9
a, 10a... inclined guide surface, 11, 12... support protrusion, 11a, 12a... presser part, 16, 17,
18... Conductive pattern, 17a, 18b... Terminal portion, 21... Conductive adhesive, 22, 23... Electrode film, 22a, 23a... Leading electrode.

Claims (1)

[Scope of utility model registration request] A synthetic resin substrate with a conductive pattern coating on the upper surface, a plurality of crystal resonator mounting stands integrally formed on the upper surface of this substrate, an inclined guide surface provided on this mounting stand, and a and a support protrusion that is integrally formed and has a vibrator holding part that extends upward from the mounting table, and the crystal resonator slides on the inclined guide surface between the holding table and the holding part. A support device for a crystal resonator, which is inserted into a crystal resonator.