JPS6319807Y2 - - Google Patents

Description

[Detailed explanation of the invention] In a conventional vibrating piece type frequency meter, the tip of a vibrating piece made of a strip-shaped steel plate is bent at a right angle or even more diagonally to form a so-called flag, which is then colored with enamel or the like. It was colored so that the presence and size of vibrations could be easily observed. However, the bending and painting of the vibrating element by press working is complicated, and dimensional errors in bending or differences in the thickness of the coating affect the resonant frequency of the vibrating element, making it difficult to keep it constant. .
Furthermore, in order to change the color of the flag, the paint must be removed, making this operation extremely difficult. The present invention provides a vibrating piece type frequency meter that does not have such drawbacks.

Fig. 1 is a plan view of an embodiment of the present invention, and Fig. 2 is a plan view of an embodiment of the present invention.
3 is an enlarged view of a part of FIG. 1, FIG. 4 is a cross-sectional view taken along line A-A in FIG. 3, and FIG. 5 is a side view of the device shown in FIGS. FIG. 3 is a perspective view of a flag attached to the tip of a vibrating piece. As described above, the plurality of vibrating pieces 1, 1, . . . made of band-shaped steel plates are formed by punching out one steel plate 2, and their bases are connected to each other. The steel plate 2 is sandwiched between a base 3 and a holding plate 4, and tightened with screws 5.
The lengths of the vibrating pieces 1, 1, . . . are gradually increased as shown in the figure, so that the resonant frequency gradually decreases. At the tips of such vibrating pieces 1, 1..., flags 6, 6... molded from synthetic resin of a desired color are attached.
The two are removably fitted together. As an example of the flags 6, 6... is shown in FIG. At the same time, a protrusion 11 is provided at the tip of the column 9, and the column 9 is slightly bent in the direction of the protrusion 11.
Further, holes into which projections 11 are fitted are formed at the tips of the vibrating pieces 1, 1, . . . . Therefore, when the tip of each vibrating piece is inserted between the pillars 8, 8, and both sides thereof are placed on the steps 10, 10 of the pillars, and the protrusion 11 of the pillar 9 is fitted into the hole, the flag 6 will absorb the vibration. It is attached to the tip of piece 1 so that it does not fall off easily. However, the flag 6 can be easily removed by bending the support 9 upward in FIG. 4 and allowing the protrusion 11 to escape from the hole in the vibrating piece.

In the above embodiment, the bases of the vibrating pieces 1, 1, .

As mentioned above, the frequency meter of the present invention has a synthetic resin molded flag 6 removably fitted to the tip of each vibrating piece, and the base 3 to which the base of the vibrating piece is fixed is used as a mechanical vibrating part. When this part is brought into contact with or vibration is applied to this part using an electromagnetic wire, etc., the vibrating piece whose resonant frequency matches the frequency of the vibration mentioned above resonates,
The flag 6 vibrates with a large amplitude as shown by the arrow in FIG. 2 to indicate the frequency. As described above, in the frequency meter of the present invention, the flag of the vibrating element is a molded synthetic resin, and it can be easily attached and detached, and the flag can be molded efficiently and easily. You can get the meter. In addition, it is possible to easily replace the flag when the color of the flag is frequently changed, or to match the resonant frequency to a desired value accurately. Further, the shape of the flag is not limited to a rectangular plate, and can be made into any shape to clearly indicate the frequency.

[Brief explanation of drawings]

Fig. 1 is a plan view of an embodiment of the present invention, and Fig. 2 is a plan view of an embodiment of the present invention.
3 is an enlarged view of a part of FIG. 1, FIG. 4 is a sectional view taken along line A-A in FIG. 3, and FIG. 5 is a vibrating element in FIGS. 1 to 4. FIG. 2 is a perspective view of a flag attached to the tip of the flag. In the figure, 1 is a vibrating piece, 2 is a steel plate, 3 is a base, 4 is a holding plate, 5 is a screw, 6 is a flag, 7 is a rectangular plate-shaped part of the flag, 8 and 9 are pillars, and 10 is a stepped part. , 11 are protrusions.

Claims (1)

[Scope of utility model registration request] A vibrating piece in which a flag formed by molding synthetic resin is removably fitted to each tip of a plurality of band-shaped vibrating pieces, each of which has one end fixed to a base and whose resonance frequency is adjusted to a desired value. type frequency meter.