JPS5923336Y2 - pressure switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressure switch that opens and closes the switch by hydraulic pressure sensing operation of a diaphragm built into the body.

Problems with this type of switch include the sealing performance and durability against high pressure of the diaphragm incorporated into the body, and the workability of assembling the spring, which is also adjustable in the elastic force of the spring incorporated into the body.

The present invention was devised to improve these problems, and provides a pressure switch that improves the sealing performance and durability of the diaphragm incorporated into the body, and also facilitates the work of assembling the spring. There is something to do.

To explain this with reference to the illustrated embodiment, 1 denotes a body, which is formed into a cylindrical body with openings at both ends, and the edges of the openings at both ends are formed into caulked portions 1a, 1b, and the inner circumferential surface thereof is First locking portion 1C having a step a at the bottom
and the second locking portion 1d, and the screw hole 1e further above.

2 indicates a pressure receiving plate, and the pressure receiving plate 2 is connected to the first
It is inserted into the bottle 1 so as to be locked by the locking part 1C, and on its upper surface there is a sliding rod 3 implanted therein, and a coil-shaped width spring 4 surrounding the sliding rod 3. A movable contact 5 is slidably provided through the movable contact 5, and a pressure receiving protrusion 2a is provided on the lower surface of the movable contact 5 to be fitted into a through hole 6a provided in a presser plate 6, which will be described later.
is provided.

Reference numeral 6 indicates a presser plate, and the presser plate 6 is inserted into the body 1 so as to be locked with the second locking portion 1d of the body 1, and a cap-shaped portion provided on the diaphragm 7 is located at the center of the presser plate 6. A through hole 6a into which the pressure receiving part 7a is inserted, and a pressing surface 6b which presses an annular seal part 7b provided on the diaphragm 7 are provided.
The pressure receiving part 7a and the sealing part 7b of the diaphragm 7 are formed to have substantially the same thickness.

Reference numeral 8 indicates a pressure introduction pipe, and the introduction pipe 8 has an annular mounting collar piece 8a so as to be caulked to the body 1 via the presser plate 6, and the inner surface of the collar piece 8a is provided with the diaphragm. A concave seat 8b that supports the diaphragm 7 via a ring 9 fitted onto its outer periphery, and a projection 8C that supports the seal portion 7b of the diaphragm 7 from the lower surface in a ring shape are formed.

The pressure receiving plate 2, the holding plate 6, the diaphragm 7, and the pressure introducing pipe 8 are respectively mounted in sequence from the bottom surface of the body 1 and assembled into the body 1 by tightening the caulking portions 1a.

Reference numeral 10 indicates a main spring, and the main spring 10 is placed on a pressure receiving plate 2 incorporated in the body 1, and then
The elastic force of the lid body 11 is adjusted by the lid body 11 which is screwed into the screw hole 1e provided in the body 1, and after adjusting the spring pressure of the main spring 10, the lid body 11 is secured to the body by caulking the caulking portion 1b provided in the body 1. Fixed to 1.

12 is a terminal plate, and this terminal plate 12 has a pair of fixed terminals 13 and 13 implanted therein to be in contact with the movable contact 5, and also maintains the contact pressure between the terminal 13 and the movable contact 5, that is, the secondary spring. 4 is screwed into a central screw hole 11a provided in the lid 11.

In the figure, 14 is the lead wire of the terminal plate 12, 15 is the waterproofing of the terminal plate 12, insulating enclosure 16 is the stopper of the movable contact 5, 17 is the interlocking plate of the pressure receiving protrusion 2a, and 18 is the mounting hole for the pressure introduction pipe. , 19 indicate the pressure introduction hole.

Since the present invention is constructed as described above, when normal pressure is applied to the diaphragm 7 as shown in the figure, the pressure receiving plate 2 is raised against the set elastic force of its main spring 10, The movable contact 5 is in contact with the fixed contact 13 and is in the switched-on state, but when the pressure applied to the diaphragm 7 decreases and the set elastic force of the main spring 10 applied to the pressure receiving plate 2 becomes stronger, the pressure receiving plate 2 is lowered, and the movable contact 5 becomes the fixed contact 13.
According to the present invention, the body 1 is formed into a cylindrical body with openings at both ends, and the pressure receiving plate 2 having the movable contact 5 and the holding plate 6 are connected from the lower opening. Since the diaphragm 7 and the pressure introduction pipe 8 are assembled in sequence and the diaphragm 7 is fixed in a sealed state by caulking the caulking portion 1a of the open end, the sealing performance can be improved, and the pressure receiving tube having the movable contact 5 The amplitude of the plate 2 is regulated between the first locking part 1C of the body 1 and the presser plate 6 which is locked to the second locking part 1d of the body 1, so it operates according to the amplitude. diaphragm 7
The main spring 10, the cover body 11, and the terminal plate 14 can be assembled in sequence from the upper opening of the body 1, and the cover body 11 and the terminal plate 1 can be assembled together.
4 has the advantage that the main spring 10 and the sub-spring 4 of the movable contact 5 are screwed together so that the elastic force can be freely adjusted, making it easy to assemble and adjust the switch mechanism.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view showing an embodiment of the present invention. 1... Body, 1a... Caulking part, 1
b... Clamping part, 1C... Locking part, 1
d... Locking part, 2... Pressure receiving plate, 2a.
...Pressure receiving protrusion, 3...Sliding rod, 4...
... Sub-spring, 5... Movable contact, 6...
- Holding plate, 6... Through hole, 6a... Holding surface, 7... Diaphragm, 7a... Pressure receiving part, 7b... Seal portion, 8...Pressure introduction pipe, 8C...Support protrusion, 10...
Main spring, 11... Lid body, 11 a...
Screw hole, 12... terminal board, 13... fixed contact.

Claims (1)

[Scope of utility model registration request] A diaphragm 7 having a cap-shaped pressure receiving part 7a and an annular seal part 7b on the outer periphery of the lower edge of the pressure receiving part 7a, and a through hole 6b into which the pressure receiving part 7a of the diaphragm 7 is inserted,
Also, a presser plate 6 having a presser surface 6b that presses the seal portion 7b, and a pressure receiving protrusion 2a that is fitted into a through hole 6a of the presser plate 6.
a pressure receiving plate 2 having a movable contact 5 slidably installed via a sliding rod 3 and a width spring 4;
and a locking part IC that locks the presser plate 6 with a predetermined gap.
, ld, and a ring-shaped support protrusion that is fixed via a caulked portion 1a provided at the lower open end of the cylindrical body 1 and abuts the seal portion 7b of the diaphragm 7. A pressure introduction pipe 8 having a diameter of 8C, and the pressure receiving plate 2 that is locked to the body 1 via the pressure introduction pipe 8.
The main spring 10 placed thereon and the iron ball spring 10 are screwed onto the body 1 so as to be adjustable and are fixed via a caulking portion 1b provided at the upper open end of the body 1. A pressure switch comprising a lid 11, and a terminal plate 12 having a fixed contact 13 that is screwed into a central screw hole 11a of the lid 11 and comes into contact with the movable contact 5.