JPS5943281A - Diaphragm cylinder - Google Patents

Abstract

PURPOSE:To smoothly and rapidly move an operating rod and reduce the number of conduit to be used so as to avoid complication of pipings, by mounting on a port of a housing a cover member including an orifice having a diameter smaller than that of the port, and designing to apply a predetermined air pressure through the orifice into one chamber. CONSTITUTION:When atmospheric pressure air to be supplied through a hose 50 is converted to vacuum air, air in a vacuum chamber 30 is gradually removed through an orifice 48 to outside to gradually reduce pressure in the vacuum chamber 30. Accordingly, atmospheric pressure air in an atmopheric chamber 28 gradually moves a diaphragm 26 against a biasing force of a compression spring 44 to the vacuum chamber 30 side, thereby moving a rod 16. Thus, as a flow control mechanism is simply provided, it is economically advantageous in such an aspect as the number of elements to be used as well as the number of steps for manufacture.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a diaphragm ++S sill, in which the movement of its actuating rod is smoothly and gently carried out at 11j.
This invention relates to a diaphragm type ring.

Conventionally, p7.4 of air conditioner i'i'' for automobiles, etc.
In the case of a wind direction board drive device that automatically moves the wind direction board provided at the air blowing port, a diaphragm lx, lff that uses air pressure as its driving means is used. Schilling is often used.

As is well known, this diaphragm type syringe divides the internal space of the housing into two chambers with a diaphragm, and applies a predetermined air pressure into the chamber -Jj through a boat provided in the housing. By applying an electric current, the diaphragm is displaced, thereby causing the actuating rod attached to the diaphragm to move in its axial direction, and does not itself have an actuating rod control function. Since the actuating rod moves rapidly due to the application of air pressure, when the actuating rod is moved relatively slowly as in the case of using the wind direction plate drive device, the air passage from the air pressure source - ”−
It was necessary to separately provide a flow rate control mechanism using an orifice, which is a flow restriction restrictor, to limit the flow rate of air to the cylinder and to moderate the movement speed of the actuating rod.

However, in the conventional configuration in which the diaphragm cylinder and the flow rate control mechanism are separately provided as described above,
The overall number of parts and T: is large, which is economically disadvantageous, and it is also difficult to arrange conduits for air passages between the cylinder and the current control mechanism, and between the flow rate control mechanism and the air pressure source. This was more troublesome as the number of conduits used increased.

The present invention has been made in an attempt to eliminate such conventional drawbacks, and its purpose is directly to:
An object of the present invention is to provide a diaphragm type cylinder having a function of allowing smooth and gradual movement of an operating rod.
Indirectly, we provide such diaphragm type cylinders at low cost.■.

The objective is to reduce the number of conduits used and reduce the complexity of piping.

That is, the gist of the present invention is that, in the diaphragm type cylinder as described above, a lid member having an orifice having a smaller diameter than the boat is placed in the boat provided in the housing, T-J, and a predetermined air pressure is applied. is applied through the orifice into the chamber of [7te-Jj.

Therefore, according to the diaphragm cylinder having such a structure, the lid member having the orifice is integrated with the diaphragm cylinder so that the diaphragm cylinder itself has a function of controlling the movement speed of the operating rod. There is no need to provide a flow rate control mechanism separately from the cylinder, and because of its configuration, the number of parts and the number of parts to be manufactured can be reduced, and the manufacturing cost can be reduced compared to the conventional case where each is provided separately.

In addition, there is an advantage that the number of conduits to be installed can be reduced, reducing the trouble of piping, and there is also the advantage that a design for fixing the flow rate control mechanism to a predetermined stationary member is not required. It became.

Hereinafter, in order to clarify the present invention more specifically, one embodiment in which the present invention is applied to a wind deflector drive device for an automobile will be described in detail based on the drawings. Needless to say, it can also be used as a driving means.

First, FIG. 1 is a diagram schematically showing the main parts of an automobile wind direction plate drive device using a diaphragm type cylinder according to the present invention. In the figure, reference numeral 2 denotes a wind direction plate having an appropriate number of thin films attached to the air outlet 4 of the air conditioner, and is rotatably supported via a support shaft 6 provided parallel to each air outlet 4. ing. Further, the wind direction plates 2 are pivotally supported at the ends on the same side by a connecting plate 10 by a pin 8, and this connecting plate 10 is connected to a rod 16 of a diaphragm type cylinder 14 fixed to a stationary member (not shown) by a pin 12. Connected to the tip.

By the way, the diaphragm cylinder 14 is
The configuration is as shown in the figure.

That is, in the figure, 18 and 20 are first and second housings each having a substantially bottomed cylindrical shape, and are airtightly joined by seven rung parts 22 and 24 formed on the periphery of each opening [1 part]. The body is covered with Kr. The internal space of this hollow body is connected to an air-tight air-opening chamber 28 on the first housing 18 side and a second It is partitioned into one chamber with a negative pressure chamber (pressure chamber) 30 on the housing 20 side.

A long guide 32 is integrally formed at the bottom of the first housing 18 so as to protrude outward.
is held in its axial direction without any movement. The popular open chamber 28 is communicated with the atmosphere through a gap between the rod 16 and the rod guide 32. rod 1
At the base end of 6, in order from the rod 16 side, there are ``1 sodo sabota 34, diaphragm 26, and diaphragm sabota 3''.
6 and the spring aborter 38 are overlapped and the screw 4
0, so that the rod 16 can be moved together with the diaphragm 26. The rod supporter 34 has a generally disk shape with a peripheral edge bent toward the rod 16 side, and cooperates with a diaphragm supporter 36 having a generally bottomed cylindrical shape and opening on the side opposite to the rod 16. As a result, the diaphragm 26 is smoothly deformed as it moves, and the displacement of the diaphragm 26 is effectively transmitted to the rod 16 in its axial direction. The spring supporter 38 has a substantially bottomed cylindrical shape with a diameter smaller than that of the diaphragm supporter 36 and 17FJO in the same direction as the diaphragm supporter 36.

On the other hand, a bottomed cylindrical spring guide 42 whose bottom side protrudes into the negative pressure chamber 30 is formed at the bottom of the second housing 20 . A compression spring 44 is provided between the bottom of the second housing 20 and the bottom of the spring supporter 38, and is guided by the inner circumferential surface of the spring supporter 38, and constantly biases the diaphragm 26 toward the atmosphere opening chamber 28. A boat 46 is attached to the bottom of the spring guide 42.
extends toward the inner space of the spring kite 42, and a flow rate control mechanism 48 is provided in one part of the negative eye of the boat 46, which opens on the side of the chamber 30. Note that the boat 46 is connected to a control valve mechanism (not shown) by a boat 50,
This control valve mechanism connects a negative pressure source such as an engine manifold to the atmosphere.

As shown in FIG. 3, the flow rate control mechanism 48 includes a cylindrical sleeve 52 made of synthetic resin, a four part 54 formed at the opening of the sleeve 52 on the side of the negative pressure chamber 30, and a bottom portion of the sleeve 52. , the negative pressure chamber 30 is located in the middle of the rib 52.
It consists of a bottomed cylindrical orifice part side 56 made of metal such as stainless steel, which is fitted and fixed as shown in FIG. An orifice portion is formed that is a small diaphragm. This flow rate control mechanism 48
The four parts 60 formed at the opening on the side of the negative pressure chamber 30 are fitted through a filter 62 made of felt or the like to prevent clogging of the orifice 58, and fixed to the second housing 20 by ultrasonic welding or the like. has been done. In addition, the diameter of the four parts 60 increases in three stages,
The filter 62 is held in the second stage and has a wide area in contact with the space before and after it, so that the filter effect is more effective. Further, in FIG. 3, a ring-shaped protrusion 64 formed on the sleeve 52 in contact with the filter 62 is used to securely hold the filter 62 between the filter 62 and the second housing 20. As shown in FIG.

In the wind direction plate drive device having such a configuration, when the air supplied through the port 50 is switched from the atmosphere to negative pressure air, the air in the negative pressure chamber 30 is gradually exhausted to the outside through the orifice 58, and the negative pressure is increased. The pressure within chamber 30 gradually decreases. Therefore, the atmosphere in the atmosphere opening chamber 28 gradually moves the diaphragm 26 toward the negative pressure chamber 30 against the force of the compression spring 44, and based on this movement, the air flows through the rod 16 into the wind direction plate. 2 is slowly rotated counterclockwise in FIG. On the other hand, even when the supplied air is switched from negative pressure air to air, the flow rate of the air flowing into the negative chamber 30 is restricted by the orifice 58, so the pressure in the negative pressure chamber 30 gradually increases. The pressure is not increased and therefore diaphragm 2
6 moves slowly toward the popular open room 28 side, and the wind direction plate 2 also rotates clockwise slowly.

-1- As is clear from the above description, according to this embodiment, there is no need to provide a flow control mechanism separately from the diaphragm cylinder 14, and the A-refrigerator is housed in its dedicated housing as in the conventional case. Since there is no need to accommodate them, it is more economically advantageous than the conventional method in terms of the number of parts used and the number of production. .

In addition, the number of hoses 50 used is reduced by one, which not only simplifies piping, but also allows only one filter to be installed before and after the orifice. This makes it possible to carry out the same operations at the same time as the old J, which is economically advantageous in this sense as well.

Furthermore, this embodiment has the advantage that since the boat 46 is housed in the inner space of the spring kite 42, there is no risk of the boat 46 being damaged.

In addition to the above-described embodiment, the present invention can also be used with a configuration as shown in FIG. 4 to obtain similar effects. That is, in FIG. 4, the bow I 66 is formed to protrude from the bottom of the second housing 68 toward the external space, and the bow I 66 is also formed at the bottom of the second housing 68 to connect the chamber 30 to the negative 1-.
The spring guide 70 that is formed to protrude inward has a simple cylindrical +V shape. Then, as shown in FIG. 5, the orifice member 5G is connected to the orifice member 5G through the filter 62 to the four parts 72 formed between the tips 1-1 of the spring guide 70. A flow control mechanism 76 consisting of a ring-shaped holding member 74 held by II 7 is inserted, and the outer circumferential surface of the holding member 74 is ultrasonically welded to the inner circumferential surface of the four parts 72 to be fixed to the second housing 68. It is. At this time, the filter 62 presses the bow of the holding part 4''474) 66 flll'l II
"(, groove 1.-protrusion χ formed on the periphery) 78 and recess 7
2(,') to be sandwiched by the bottom surface, 1-li,
-,,y □(A gap 'ν with a wide cross-sectional area is formed between the flow controller 2 and the flow rate controller f'N 76, so that the filter effect is effectively *-e I can shut it up.
) has l:, l, +7 and −C.

Moreover, in the embodiment described above, −,,y 4
Assuming that the router 62 is used, the 1h diameter of the IJ filter 58 is relatively large [-
If there is a risk of 1-clogging, and 1-1 is not present, the flow rate control mechanism is configured to be attached to the interview hose.

Furthermore, there is no problem even if the diamond '7 \ 4 novo - ri 36 and the spring kite 38 are configured integrally, and the air I] - negative l-1 is used as the source, and IJII is used instead of the air source.
Even if an IJ source is used, the diaphragm cylinder according to the invention may be suitable.

In addition, the present invention is not limited to the above-mentioned embodiments, such as r++, and it goes without saying that it can be implemented with various modifications and improvements within the scope of the spirit of the present invention. .

[Brief explanation of drawings]

FIG. 1 shows the first floor of an automobile wind direction plate drive device to which an example of the diaphragm cylinder according to the present invention is applied as a drive means.
, FIG. 2 is a longitudinal cross-sectional view of the diaphragm cylinder, FIG. 3 is an enlarged cross-sectional view of the main portion, and FIG. 4 is a diagram showing another embodiment of the present invention. The second showing
The figure corresponding to the figure, FIG. 5, is an enlarged sectional view of the main part. I4: Diaphragm cylinder 16: Rod 18: First housing 20.6
8: Second housing 26: Diaphragm 28: Atmospheric release chamber 30: Negative pressure chamber 34: Rod saboter 36: Diaphragm supporter 38 Spring supporter 42.70 Spring guide 44: Compression spring 46, 66: Boat 48.76
: Flow rate control mechanism 52 sleeve 54: recess 60. 72: recess 56: orifice member 58 orifice 62: filter 64. 78: protrusion 74: presser member applicant Kojima Press - Nigyo Co., Ltd. r + representative uIH person
Masukoji Nakajima Sen, Ba1j; (and 2 others) L,
, −:j

Claims (2)

[Claims] (1) The internal space of the housing is partitioned into two chambers by a diaphragm, and a predetermined air pressure is applied to one of the chambers through a boat installed in the housing, thereby displacing the diamond 7 ram, In a diaphragm type cylinder which is adapted to move an operating rod mounted on the diaphragm in its axial direction, the boat provided in the housing has an orifice having a smaller diameter than the boat. A diaphragm type cylinder, characterized in that a lid member is attached so that the predetermined air pressure is applied to the one chamber through the orifice. (2) The diaphragm cylinder according to the scope of Patent R19, item 1, wherein the lid member is attached to the boat through a predetermined filter member.