JPH0145189Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a vibration device used for automobile seats, karaoke stages, etc.

(Prior art) Previously, the applicant had applied for patent application no.
We are proposing a vibration device as shown in the figure. That is,
A flat donut-shaped permanent magnet 12 is placed in a case 11 that constitutes a vibrating body 10, and a coil 1 is placed in an iron-based winding frame 13.
4 is wound around the excitation coil 15, the permanent magnet 12 is fixed to the lower plate of the case 11, and a spring plate 16 whose center is fixed to the upper plate of the case 11 is fixed to the excitation coil 15. Vibration effecting body A
is formed. Further, the vibration effecting body A is opposed to the permanent magnet 12 with a predetermined vibration permissible space therebetween, and a lead wire 17 is connected to the vibration effecting body A, that is, the excitation coil 15.

(Problems to be solved by the invention) In the conventional vibrating device, as shown in FIG.
The spring plate 16 includes a large-diameter ring-shaped fixing piece 16a,
A small-diameter ring-shaped center piece 16b, and the center piece 16b.
It consists of four connecting pieces 16c extending in a cross direction from the top and connecting to the fixed piece 16a, and fixing parts 16d are provided at four places between the respective connecting pieces 16c of the fixed piece 16a, and excitation is carried out via the fixed parts 16d. Since it is fixed to the coil 15, each connecting piece 16c is fixed at two fixing parts 16d, and when the spring plate 16 vibrates, the connecting piece 16c is connected to the central piece 16b and the fixed piece 16a. Only the part between the parts moved up and down, and the amplitude could not be increased. Furthermore, in order to increase the amplitude, a large-sized vibrating device is required, resulting in a relatively high cost.

(Purpose of the invention) In view of the above-mentioned conventional problems, the present invention aims to provide a vibrating device that is small in size and can have a large amplitude.

(Means for solving the problem) In order to achieve the above object, the present invention solves the problem in case 11.
An annular excitation coil 15 and an annular permanent magnet 12 inside.
In the vibrating device in which spring plates 20, 30 are fixed to the excitation coil 15 to form a vibration effecting body B, the spring plates 20, 30 are located at the central portions of the spring plates 20, 30. from the excitation coil 1
5, the excitation coil 15 has a plurality of connecting pieces 22, 32 extending in the radial direction toward the upper surface of the excitation coil 15, and further extending in the circumferential direction along the upper surface of the excitation coil 15. It is characterized in that it is fixed at 15.

(Function) According to the present invention, the connecting piece of the spring plate extends from the central portion of the spring plate toward the excitation coil and further extends along the excitation coil, and the connecting piece is formed long, and the connecting piece is formed long. Since it is fixed to the excitation coil via the tip of the spring plate, when the spring plate vibrates, the entire connecting piece, which has a long distance, moves up and down, making it possible to obtain a large amplitude.

(Embodiment) FIGS. 1 to 4a and 4b show a first embodiment of the present invention, and the same components as in the conventional example are designated by the same reference numerals. That is, a flat donut-shaped excitation coil 15 and a permanent magnet 12 are disposed facing each other in the case 11, and a spring plate 20 is fixed to the excitation coil 15 to form the vibration effecting body B.

The spring plate 20 is composed of a ring-shaped central piece 21 and four connecting pieces 22 that are formed so that the base side faces the center of the central piece 21 and extend in a crosswise direction from the central piece 21. It is made of bronze and attached to the upper surface of the excitation coil 15. Further, the connecting piece 22 has a connecting portion 2 extending from the central piece 21 toward the upper surface of the excitation coil 15.
2a and an extension part 22b extending circumferentially from the connecting part 22a along the upper surface of the excitation coil 15. A through hole 23 is provided at the tip of the extension part 22b, and a rivet is inserted through the through hole 23. It is fixed to the excitation coil 15 at 18.

Since the present invention is configured as described above, when the vibration device according to the present embodiment is operated, the connecting piece 22 of the spring plate 20 connects with the connecting part 22a extending from the center piece 21 toward the upper surface of the exciting coil 15. The connecting piece 22 has an extension part 22b extending in the circumferential direction of the exciting coil 15 from the connecting part 22a, and is long, and since only the tip of the connecting piece 22 is fixed to the exciting coil 15, the connecting piece is elongated. The entire 21 will vibrate, and vibrations with large amplitude will occur.
It is possible to expand the vibration band and obtain smooth vibrations. FIGS. 3a and 3b and FIGS. 4a and 4b are graphs showing frequency characteristics to explain this effect. That is, the conventional vibration device (input 1W) shown in Figure 3a
As is clear from a comparison between the vibration device according to the present embodiment (input 1W) shown in Fig. 3b, the conventional vibration device has a particularly strong frequency around 80Hz and a large gap compared to frequencies around 150Hz. This causes vibration waves around 80Hz to be transmitted particularly sharply. In contrast, the vibration device according to this example has a 45Hz,
Frequencies around 60Hz, 170Hz, and 200Hz occur strongly, but one does not occur particularly strongly, and smooth vibrations are transmitted throughout. This effect is similar to that of the conventional vibration device (input 5W) shown in Figure 4a.
This can also be seen by comparing the vibration device (input 5W) according to the present example shown in FIG. 4b. In other words, while the conventional vibrator generates particularly strong vibrations around 80Hz, the vibrator according to this embodiment
The graph is displayed as a gentle mountain centered at 100Hz, and smooth vibrations occur. In addition, although the conventional vibration device (input 1W) hardly generates vibrations below 50Hz, the vibration device according to this embodiment (input 1W) also generates vibration waves with a frequency of 30Hz, and the vibration band has also been expanded. Although it is not fully clear from Fig. 3 a, b and Fig. 4 a, b, each peak of the frequency is also higher in the vibrating device according to this embodiment compared to the conventional vibrating device. In this respect as well, the vibration device according to this embodiment generates smooth vibrations, rather than being displayed sharply in the graph.

Therefore, when this vibration device is used for car seats or karaoke stages, abnormally sharp vibrations will not be transmitted, and even if it is used for a long time, it will not cause any adverse effects on the human body. will not be given.

FIG. 5 shows a second embodiment of the present invention.
Reference numeral 30 denotes a spring plate, which is composed of a ring-shaped central piece 31 and four connecting pieces 32 connected with the base side of the connecting part 32a being eccentrically fixed relative to the central piece 31; The tip is fixed to an excitation coil 15.

According to this embodiment, the connecting portion 3 of the connecting piece 32
Since the base side of 2a is connected to the center piece 31 in an eccentric state with respect to the center piece 31, the kinetic energy of the vertical movement of each of the connection pieces 32 is not concentrated at the center of the center piece 31, Since the vibration waves are dispersed throughout the central piece 31, vibration waves of a specific frequency are not generated particularly strongly, and the vibrations become smoother throughout. Note that the other configurations and effects are the same as those of the first embodiment.

In each of the above embodiments, the spring plates 20 and 30 are made of phosphor bronze, but they may also be made of carbon fiber resin. Although not shown, when the carbon fiber resin is used, it is manufactured by injection molding.
0 and 30, and even if distortion occurs in the through hole portion, it will be punched out, so no distortion will occur in the spring plates 20, 30.

(Effects of the invention) As explained above, the present invention has an annular excitation coil and an annular permanent magnet disposed facing each other in a case, and a spring plate is fixed to the excitation coil to act as a vibration acting body. In the vibrating device, the spring plate has a plurality of connecting pieces extending in a radial direction from a central portion of the spring plate toward an upper surface of the excitation coil, and further extending in a circumferential direction along the upper surface of the excitation coil. Since each connecting piece is fixed to the excitation coil via the tip, the connecting piece is formed long, and when the spring plate vibrates, the entire long connecting piece moves up and down, making it possible to obtain a large amplitude. It has the advantage of being able to expand the vibration band and also smoothing out the vibration itself. Furthermore, since the amplitude can be increased, it has the advantage that it is possible to provide a vibrating device that is small and inexpensive.

[Brief explanation of the drawing]

The drawings are provided to explain the present invention, and FIGS. 1 to 4 a and b show the first part of the vibration device according to the present invention.
Fig. 1 is a sectional view, Fig. 2 is a partially cutaway plan view showing the main parts, and Fig. 3 a and b are input diagrams.
The test of the vibration device conducted at 1W is shown, and Figure 3a is a graph showing the frequency characteristics of the conventional vibration device.
Figure 3b is a graph showing the frequency characteristics of the vibrating device of this example, Figures 4a and b show the test of the vibrating device conducted with an input of 5W, and Figure 4a is the frequency characteristic of the conventional vibrating device. A graph showing the characteristics, FIG. 4b is a graph showing the frequency characteristics of the vibrating device of this embodiment, and FIG. 5 is a partially cutaway plan view of the main part showing the second embodiment of the vibrating device according to the present invention. , FIG. 6 and FIG. 7 show a conventional vibrating device, and FIG. 6 is a cross-sectional view.
FIG. 7 is a partially cutaway plan view showing the main parts. In the figure, 11... Case, 12... Permanent magnet, 1
5... Excitation coil, 20, 30... Spring plate, 2
2, 32... Connection piece, B... Vibration effecting body.

Claims (1)

[Scope of utility model registration request] In a vibrating device in which an annular excitation coil and an annular permanent magnet are disposed facing each other in a case, and a spring plate is fixed to the excitation coil to serve as a vibration effecting body, the spring plate is located at the center of the spring plate. It has a plurality of connecting pieces extending radially from the top surface of the exciting coil toward the top surface of the exciting coil and further extending in the circumferential direction along the top surface of the exciting coil, and is fixed to the exciting coil via the tip of each connecting piece. A vibrating device characterized by: