JPH06229403A - Vibration generation mechanism by compression liquid - Google Patents

Abstract

PURPOSE:To improve reliability of reciprocating movement without requiring a precise work by attaching a thin-plate elastic member on the upper part of a vibration body and supplying air to a pressurized chamber in which a close adhesive member is sealingly formed by its elasticity. CONSTITUTION:When pressurized air is supplied to a channel 11, the pressure in a pressurized chamber 22 increases so that downward force is applied to an elastic member 6 and a vibration body 4 descends. Because of descending of the vibration body 4, a close adhesive member 3 and the elastic member 6 cannot hold the sealed state of the pressurized chamber 22 so that pressure is released to a hollow part 21. When air in the pressurized chamber 22 is released to the atmosphere, the vibration body 4 is pressed by a compression spring 5 so as to regain the original state. Continuous supply of pressurized air forces such an action repeatedly that the vibration body 4 vibrates continuously. Therefore when the tip of the axial part 4A of the vibration body 3 is formed in a conical shape and the tip part is pressed against the surface of a workpiece 30, the surface of the workpiece 13 is plastically deformed and carved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for a vibrating body to generate mechanical vibration with a compressive fluid such as air. An example of a device that uses a vibration generating mechanism by air pressure is a marking pen in which the tip of a vibrating body is formed into a conical shape and the tip is pressed against the surface of metal or the like to engrave.

[0002]

2. Description of the Related Art Next, a structure of a conventional vibration generating mechanism will be described with reference to FIG. 4, taking a marking pen as an example. In FIG. 4, 7 is a case, 8 is a holder, 9 is an air source, 13
Is a piston, 14 is a pen serving as a vibrating body, and 15 is a compression spring.

In FIG. 4, the case 7 and the holder 8 are screwed together, and a hollow portion 8A is formed in the holder 8. Air source 9
Communicates with the pressurizing chamber in the case 7 through the channel 9A. The pressurizing chamber is a piston 13 which is an upper pressurizing chamber 7A and a lower pressurizing chamber 7B.
Partitioned into A passage 7C is formed in the piston 13. The pen 14 is held by the holder 8 so as to be capable of reciprocating. The compression spring 15 pushes up the piston 13,
It is held by the pen 14.

Next, the operation of FIG. 4 will be described. When pressurized air is supplied from the air source 9 to the lower pressure chamber 7B, the upper pressure chamber 7A communicates with the atmosphere through the flow path 7C, the hollow portion 8A, and the gap between the pen 14 and the holder 8. The pressure in the chamber 7B becomes higher than the pressure in the upper pressurizing chamber 7A, and the piston 1
3 rises.

When the piston 13 rises to a certain position, the upper pressurizing chamber 7A and the lower pressurizing chamber 7B communicate with each other through the flow path 7C, and the upper pressurizing chamber 7A and the lower pressurizing chamber 7B have the same pressure. In FIG. 4, since the upper pressure receiving area of the piston 13 is larger than the lower pressure receiving area, a downward force acts on the piston 13, and the piston 13 turns from rising to falling.

When the piston 13 descends to a certain position, the side wall of the piston 13 blocks the flow passage 9A, and the pressurized air in the upper pressurizing chamber 7A is discharged to the atmosphere through the flow passage 7C. When the pressure in the upper pressurizing chamber 7A is reduced, the piston 13 is pushed by the compression spring 15 and changes from descending to ascending. Piston 1
When 3 rises to a certain position, lower pressurizing chamber 7B and flow path 9A
Contacted and returned to the initial state.

The piston 13 generates vibration by repeating the reciprocating motion described above. In FIG. 4, the pen 14 follows the operation of the piston 13 by the compression spring 15, presses the tip of the pen 14 formed in a cone shape against the surface of the workpiece 30, and engraves by moving the pen tip.

[0008]

In FIG. 4, air leakage is reduced as much as possible from the gap between the case 7 that serves as a cylinder and the piston 13 to generate efficient vibration. Therefore, the cylinders and pistons required precision machining. Further, in the configuration of FIG. 4, if dust enters the gap between the piston and the cylinder, the performance and life of the device are adversely affected.

According to the present invention, pressurized air is supplied from the upper part of the case, a contact member is attached to the inner upper surface of the case so as to surround the supply port of the pressurized air, and a thin plate elastic member is attached to the upper part of the vibrating body. It is an object of the present invention to provide a vibration generating mechanism that seals a contact member with the elasticity of a thin plate elastic member to form a pressure chamber and supplies pressurized air to the pressure chamber.

[0010]

In order to achieve this object, according to the present invention, a case 1, a holder 2, a contact member 3, a vibrating body 4, a compression spring 5, and a thin plate-like elastic member 6 are provided. The case 1 and the holder 2 are joined together to form a hollow portion 21, the flow passage 11 of the case 1 communicates with the hollow portion 21, and the contact member 3 surrounds the flow passage 11 and the inner wall surface of the case 1. 12, the shaft portion 4A of the vibrating body 4 is movably held by the holder 2, the compression spring 5 is attached to the vibrating body 4 in a direction of pushing the vibrating body 4 against the inner wall surface 12, and the thin plate-shaped elastic member 6 is the vibrating body. When the pressure chamber 22 is formed by the inner wall surface 12, the contact member 3, and the thin plate-shaped elastic member 6 attached to the head portion 4B of the pressure vessel 4, and the pressurized compressive fluid is supplied to the flow path 11, the vibrating body 4 vibrates. To do.

[0011]

Next, the structure of the vibration generating mechanism according to the present invention will be described with reference to FIG. In FIG. 1, 1 is a case, 2 is a holder, and 3
Is a contact member such as an O-ring, 4 is a vibrating body, 5 is a compression spring 6 is a thin plate-like elastic member.

In FIG. 1, the case 1 and the holder 2 are screwed together to facilitate replacement of parts. A hollow portion 21 is formed in the holder 2, and the air source 10 communicates with the hollow portion 21 inside the holder 2 through a flow path 11 formed in the case 1. A groove 1A is formed in an annular shape on the upper inner wall surface 12 of the case 1, and the adhesion member 3 is attached to the groove 1A.

The shaft portion 4A of the vibrating body 4 is reciprocally held by the holder 2. The compression spring 5 is held by the vibrating body 4 in a direction to push up the vibrating body 4. The elastic member 6 is attached to the head 4B of the vibrating body 4. A pressurizing chamber 22 is formed by the inner wall surface 12, the contact member 3 and the thin plate elastic member 6.

Next, the operation of FIG. 1 will be described with reference to FIGS. 2 is an enlarged view of a main part of FIG. 1. In FIG. 2, the contact member 3 is pushed by the elastic member 6, but the inner wall surface 12 h
It protrudes by the height of. The elastic member 6 is the compression spring 5.
The contact end of the contact member 3 is bent by .delta. Figure 2
Is a state before pressurized air is supplied to the pressure chamber 22 which is a closed space, and the relationship of h> δ is maintained.

When pressurized air is supplied to the flow path 11 from the state of FIG. 2, the pressure in the pressurizing chamber 22 increases, a downward force acts on the elastic member 6, and the vibrating body 4 descends. . When the downward force acts on the elastic member 6, the elastic member 6 restores the deflection of δ. When the pressure in the pressurizing chamber 22 further rises and the vibrating body 4 descends, the hermetically sealed state of the pressurizing chamber 22 by the contact member 3 and the elastic member 6 cannot be maintained, and the state shown in FIG. 3 is obtained.

In FIG. 3, the pressurizing chamber 22 becomes an open space,
The air in the pressurizing chamber 22 is opened to the atmosphere through the hollow portion 21. When opened to the atmosphere in FIG. 3, the vibrating body 4 is pushed by the compression spring 5 and returns to the state of FIG. When the pressurized air is continuously supplied in FIG. 2, the states of FIGS. 2 and 3 are repeated, so that the vibrating body 4 continues to vibrate.

As shown in FIG. 1, the tip of the shaft portion 4A of the vibrating body 3 is formed into a conical shape, and the tip portion is processed into a workpiece 30 such as metal.
When pressed against the surface of the workpiece, the surface of the workpiece 13 can be plastically deformed by the impact force when the conical tip hits the workpiece 30, and engraving can be performed.

[0018]

According to the present invention, the pressurized air is supplied from the upper part of the case, the adhesion member is attached to the inner upper surface of the case so as to surround the supply port of the pressurized air, and the thin plate-shaped elastic member is provided on the upper part of the vibrating body. Since it is a mechanism that attaches and closes the contact member with the elasticity of the thin plate-like elastic member to form a pressurizing chamber and supplies pressurized air to the pressurizing chamber to generate vibration, the piston and the cylinder of the prior art are used. Since there is no need for the corresponding precision processed parts, an inexpensive vibration generator can be provided. Further, since there is no narrow gap, dust contained in the fluid does not enter and hinders the reciprocating motion, and a highly reliable vibration generating mechanism by the compressible fluid can be provided.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a vibration generating mechanism according to the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a state change diagram of FIG.

FIG. 4 is a configuration diagram of a vibration generating mechanism according to a conventional technique.

[Explanation of symbols]

 1 Case 2 Holder 3 Adhesion Member 4 Vibrating Body 4A Shaft Part 4B Head Part 5 Compression Spring 6 Elastic Member 11 Flow Path 12 Inner Wall Surface 21 Hollow Part 22 Pressurizing Chamber

Claims (1)

[Claims] 1. A case (1), a holder (2), and a contact member
(3), the vibrating body (4), the compression spring (5), and the thin plate elastic member (6) .The case (1) and holder (2) are connected to each other to form the hollow part (21). The flow path (11) of the case (1) communicates with the hollow part (21), and the adhesive member (3) surrounds the flow path (11) and the inner wall surface of the case (1).
Attached to (12), the shaft (4A) of the vibrating body (4) is movably held in the holder (2), and the compression spring (5) pushes the vibrating body (4) to the inner wall surface (12). Attached to the vibrating body (4), the thin plate elastic member (6) was attached to the head (4B) of the vibrating body (4), and the inner wall surface (12), the contact member (3) and the thin plate elastic member (6) were attached. When the pressurizing chamber (22) is formed and pressurized compressive fluid is supplied to the flow path (11), the vibrating body
(4) A vibration generating mechanism using a compressible fluid, characterized in that it vibrates.