JPH0997551A - Damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a damping effect even in a drive device having no pressing part for pressing a chamber by providing a damper body and a pressing member having a pressing part guided thereby to press the chamber of the damper body. SOLUTION: A damper body 20 has a first chamber 2a and second chamber 3a formed by sheets 2, 3 covering both sides of the through-hole 1a of a base 1, respectively, and a fluid 4 moved, when one chamber is pressed, to the other chamber through the hole 1a is airtightly sealed therein. A pressing member 30 has pressing parts 30a, 30b guided by the body 20 and displaced in the pressing direction to press the chambers 2a, 3a. In a damper 10, since the member 30 installed to the movable shaft 40a of an electromagnetic device 40 is displaced, thereby pressing the chamber 2a or 3a of the body 20, the fluid 4 is moved through the hole 1a of the base. The damping effect of the device 40 having no pressing part can be provided by the resistance in this movement.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper that damps impacts and vibrations of movable parts.

[0002]

2. Description of the Related Art Conventionally, as a damper X of this type, FIG.
And the one shown in FIG. This is a through hole A ₁
Substrate A with a through hole A ₁
A rubber dome-shaped sheet B, C that forms chambers B ₁ , C ₁ on both sides of A, and one chamber B ₁ (C ₁ ) is pushed through the through hole A of the substrate A. The fluid D that is hermetically sealed so that it can move to the other chamber C ₁ (B ₁ ) and the peripheral edge of the sheets B and C.
A sandwiching member E that sandwiches B ₂ and C ₂ with the substrate A.

More specifically, in this device, the movable member Y ₁ of the electromagnet device Y constituting a relay or the like is moved to
The pressing portion Y ₂ provided on the movable member Y ₁ is arranged so as to alternately press the chambers B ₁ and C ₁ on both sides.

[0004]

In the conventional damper described above, when the pressing portion Y ₂ presses one chamber B ₁ (C ₁ ), the fluid D passes through the through hole A ₁ of the substrate A. Other room C ₁ (B ₁ )
To the sheet B, C while reducing the collision speed and impact force of the pressing part X ₂ due to the resistance during the movement.
Since it is hermetically sealed, the collision noise and vibration of the electromagnet device Y 1 which constitutes a relay or the like can be reduced.

However, this is a driving device which is not provided with a pressing portion X ₂ for pressing the chambers B ₁ and C ₁ and has a damping effect which reduces shock and vibration when the movable member of the driving device is moved. I couldn't get it.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a damper capable of obtaining a damping effect even in a drive device which is not provided with a pressing portion for pressing a chamber. Especially.

[0007]

In order to solve the above-mentioned problems, according to a first aspect of the present invention, a chamber is formed on both sides of the substrate by a sheet covering both ends of a through hole formed in the substrate. A damper main body in which a fluid is hermetically sealed so that when one chamber is pressed, it can move to the other chamber through the through hole of the substrate, and the damper main body is displaced along the pressing direction by being guided by the damper main body. And a pressing member provided with a pressing portion for pressing the chamber.

According to a second aspect of the present invention, in the first aspect, the chamber of the damper body and the pressing portion of the pressing member are always in contact with each other.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The damper 10 includes a damper body 20 and a pressing member 30.

The damper main body 20 includes a substrate 1, sheets 2 and 3,
The fluid 4 is composed of the sandwiching members 5 and 5. In detail, board 1
For example, a resin material such as PBT or ABS is formed into a substantially H-shaped flat plate, and a through hole having a diameter of, for example, φ 0.5 is formed at the substantially center.
1a is formed, and guide portions 1b for slidably guiding the pressing member 30 are provided at both ends.

The sheets 2 and 3 are formed of silicon rubber or the like into a hemispherical dome shape. The sheets 2 and 3 cover the both ends of the through hole 1a, and both sides of the substrate 1 are filled with an appropriate amount of a viscous fluid 4 such as fluorine grease to fill the first chamber.
2a and the second chamber 3a are formed respectively. This sheet 2,
The respective top portions of 3 are thick pressed portions 2b, 3b that are pressed by the pressing member 30. Also, this sheet 2,
3, peripheral edge portions 2c and 3c are provided with ridge-shaped clamped portions 2d and 3d that are clamped by the clamping members 5 and 5, respectively.

The holding members 5, 5 are made of the same material as the substrate 1 and are formed in a substantially H-shaped cross section, and have a diameter slightly larger than the outer diameters of the first chamber 2a and the second chamber 3a at the substantially central portion. Through hole
5a, 5a are provided respectively, and the protrusions 5b, 5 for ultrasonic welding with the substrate 1 are provided outside the opening edge on one end side of the through holes 5a, 5a.
It is provided around b. The holding members 5 and 5 are guide portions for guiding the pressing member 30 slidably on both ends thereof.
5c and 5c are provided by notches respectively.

The pressing member 30 is formed of a high-strength resin such as PBT or PC in a substantially square shape, and one end of the assembled member in the pressing direction is an outer surface. Is provided with a coupling portion 30a, and the inner surfaces at both ends in the pressing direction are the first chamber 2a or the second chamber of the damper body 20.
The pressing portions 30b and 30c press the 3a.

Next, a procedure for assembling this product will be described. An appropriate amount of fluid for the sheets 2 and 3 that are formed in the dome shape in advance
4 is injected to cover both ends of the through hole 1a with these sheets 2 and 3 to form the first chamber 2a and the second chamber 3a on both surfaces of the substrate 1, respectively. Next, the board 1 and the ridges 5b, 5
With 5b, the sandwiched portions 2d, 3d of the seats 2, 3 respectively
If they are airtightly sandwiched and joined by ultrasonic welding and left under reduced pressure in this state, the air in the first chamber 2a and the second chamber 3a is degassed through the sheets 2 and 3, and the fluid 4 is vaporized. It is hermetically sealed. Then, the pressing member 30 is fitted to the damper body 20. More specifically, the pressing member 30 slides the opening portion forming the square shape in the elastic region while sliding both sides in the pressing direction by the guide portion 1b of the substrate 1 and the guide portions 5c, 5c of the sandwiching members 5, 5. The damper body 20 is fitted so as to be movably supported. In this fitted state, the first chamber of the damper body 20
The 2a and the second chamber 3a are opposed to each other with a gap between the pressing members 30a and 30b of the pressing member 30.

Next, the movable shaft (movable portion) 40 of the electromagnet device 40.
The operation of the damper 10 in the state of FIG. 3 coupled to a by the coupling portion 30a will be described with reference to FIG. The electromagnet device 40 is provided in the relay 50. FIG. 3A shows a state in which one pressing portion 30b of the pressing member 30 is in contact with the pressed portion 2b of the seat 2 forming the one first chamber 2a of the damper body 20. Where electromagnet device 40
When the coil 40b is energized, the movable shaft 40a moves, and the pressing member 30 coupled to the movable shaft 40a interlocks, as shown in FIG. 5c, 5c is displaced along the pressing direction, the other pressing portion 30c collides with the pressed portion 3b of the seat 3 forming the other second chamber 3a of the damper body 20 and presses the same.
As shown in (c), the fluid 4 in the second chamber 3a moves to the one first chamber 2a through the through hole 1a. Then, the pressing member 30
The moving speed is reduced by the resistance generated when the viscous fluid 4 moves, and the movable shaft 40a connected to the pressing member 30 is
The moving speed of the armature also slows down, and the armatures connected to the movable shaft 40a
The shock when 40c collides with the fixed iron core 40d is mitigated. When the coil 40b is energized in the opposite direction, it operates in the opposite way to the state shown in Fig. 2 (d) and then returns to the state shown in Fig. 3 (a) .At this time, the damper 10 also causes the armature 40e to move. The impact when colliding with the fixed iron core 40f is mitigated.

Next, the relationship between the displacement of the movable shaft 40a of the electromagnet device 40 and time during the operation of the damper 10 will be described with reference to FIG. The movable shaft 40a is in a state in which the armature 40e is in contact with the end surface of the fixed iron core 40f, in other words, the pressing portion 30b of the pressing member 30 is one of the first chambers of the damper body 20.
It gradually displaces from the point P abutting the 2a, but when the pressing portion 30c displaces to the point Q where it collides with the pressed portion 3b of the seat 3 forming the second chamber 3a of the damper body 20, After that, the movable speed slows down and the armature 40c moves to the fixed iron core 40d.
Is gradually displaced to a point R that comes into contact with the end face of the. That is,
The damping effect that reduces the impact or the like when the movable shaft 40a moves can be obtained in the damping time T ₁ which is between the point Q and the point R.

In this damper 10, an electromagnet device is used.
The pressing member 30 mounted so as to interlock with the movable shaft 40a constituting the 40 is displaced by being guided by the damper body 20 when the movable shaft 40a moves, and thus the first chamber 2a of the damper body 20 is moved. Since the (second chamber 3a) is pressed, the fluid 4 passes through the through hole 1a of the substrate 1 and the other second chamber 3a.
It is possible to obtain the damping effect of the electromagnet device 40 that is moved to the (first chamber 2a) and is not provided with a pressing portion that presses the first chamber 2a or the second chamber 3a due to the resistance during the movement.

Next, a second embodiment of the present invention will be described with reference to FIG.
The following description is based on FIG. Note that members that are substantially the same as those in the first embodiment are given the same reference numerals, and only different points are described. In the first embodiment, the first chamber 2a and the second chamber 3a of the damper body 20 have the pressing portions 30a, 30b of the pressing member 30.
While facing each other with a gap between
In this embodiment, the contact is always made.

Next, the movable shaft (movable portion) 40 of the electromagnet device 40.
The damper 10 when it is connected to a by the connecting portion 30a.
The operation of will be described with reference to FIG. In the figure (a), one pressing portion 30b of the pressing member 30 abuts against the pressed portion 2b of the seat 2 forming the first chamber 2a in the compressed state of the damper body 20, and the other pressing portion 30b. 30c is in contact with the pressed portion 3b of the seat 3 forming the second chamber 3a in the expanded state of the damper body 20. Where the coil of the electromagnet device 40
When electricity is applied to 40b, the movable shaft 40a
Move, and the pressing member 30 coupled to the movable shaft 40a is interlocked, and the guide portion 1b and the guide portions 5c, 5 of the damper body 20 are moved.
It is guided by c and is displaced along the pressing direction. Then, the first chamber 2a in the compressed state of the damper main body 20 gradually expands, and the second chamber 3a in the compressed state expands, as shown in FIG. The fluid 4 in the expanded second chamber 3a passes through the through hole 1a and moves to the first chamber 2a. Then, the moving speed of the pressing member 30 is reduced by the resistance generated when the viscous fluid 4 moves, the moving speed of the movable shaft 40a connected to the pressing member 30 also decreases, and the contacting member connected to the movable shaft 40a is slowed down. The impact when the pole 40c collides with the fixed iron core 40d is mitigated. When the coil 40b is energized in the opposite direction, it operates in the opposite direction,
After returning to the state of (a) in the figure after the state of (d) in the figure, the armature 40e is also fixed by the damper 10 at this time.
The impact when the vehicle collides with is mitigated.

Next, the relationship between the displacement of the movable shaft 40a of the electromagnet device 40 and the time during the operation of the damper 10 will be described with reference to FIG. The movable shaft 40a is in a state in which the armature 40e is in contact with the end surface of the fixed iron core 40f, in other words, the pressing portion 30b of the pressing member 30 presses the seat 2 forming the compressed first chamber 2a of the damper body 20. The second chamber, which is in an extended state, gradually displaces from the point P in contact with the portion 2b.
As the airtightly sealed fluid 4a of 3a passes through the through hole 1a of the substrate 1 and goes beyond the point S where it begins to move to the first chamber 2a, the movable speed becomes slow and constant, and the armature 40c becomes stationary. Is gradually displaced to a point T which is in contact with the end surface of the. That is, the damping effect for reducing the impact or the like when the movable shaft 40a moves can be obtained in the damping time T ₂ which is between the point S and the point T.

In addition to the effects of the first embodiment, in the damper 10, the first chamber 2a and the second chamber 3a of the damper body 20 and the pressing portions 30b and 30c of the pressing member are always in contact with each other. As a result, the movable shaft 40a of the drive device 40 is moved, and more specifically, the movable chamber 40a is pressed and the first chamber 2a or the second chamber 3a of the damper body 20 is pressed soon. The effect can be obtained.

[0022]

According to the first aspect of the present invention, the pressing member mounted so as to interlock with the movable member constituting the driving device such as the electromagnet device is displaced by being guided by the damper main body when the movable member moves. By doing so, since the chamber of the damper body is pressed, the fluid moves to the other chamber through the through hole of the substrate, and even when the drive unit is not provided with the pressing portion that presses the chamber due to the resistance during the movement. The damping effect can be obtained.

According to a second aspect of the present invention, in addition to the effect of the first aspect, the chamber of the damper body and the pressing portion of the pressing member are constantly in contact with each other, so that the movable member of the drive device is moved and the damper is moved. Since the chamber of the main body is pressed, the damping effect can be obtained regardless of the movable stroke of the movable member.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a first embodiment of the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is a perspective view showing a state in which the above-mentioned one is attached to a relay provided with an electromagnet device having no pressing portion.

FIG. 4 is a sectional view showing an operation state of the above.

FIG. 5 is an explanatory diagram showing the relationship between time and displacement of the movable shaft of the electromagnet device, the operation of which is buffered by the same as above.

FIG. 6 is a sectional view of a second embodiment of the present invention.

FIG. 7 is a cross-sectional view showing an operating state of the above.

FIG. 8 is an explanatory diagram showing a relationship between time and displacement of the movable shaft of the electromagnet device, the operation of which is buffered by the above.

FIG. 9 is a sectional view of a conventional example.

FIG. 10 is a perspective view showing a disposition state of the same as above.

[Explanation of symbols]

 1 Board 1a Through hole 2 Seat 2a First chamber 3 Seat 3a Second chamber 4 Fluid 20 Damper body 30 Pressing members 30a, 30b Pressing part

Claims (2)

[Claims] 1. A chamber is formed on both sides of a substrate by a sheet covering both ends of a through hole formed in the substrate, and when one chamber is pressed, it can move to the other chamber through the through hole of the substrate. A damper main body in which a fluid is hermetically sealed, and a pressing member provided with a pressing portion for pressing the chamber of the damper main body by being guided by the damper main body and displaced along the pressing direction. Damper to do. 2. The damper according to claim 1, wherein the chamber of the damper body and the pressing portion of the pressing member are always in contact with each other.