JPS5919389Y2 - solenoid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solenoid that magnetically operates a plunger body located inside a coil.

As shown in Fig. 4, a conventional device of this type has a plunger holder f9g inserted into internal metal parts d and e integrally formed by fitting bobbin case-shaped cylindrical yokes b and C from both sides of the coil body a. It was designed to fit and support the plunger h.

Therefore, the outer periphery of the plunger h and the internal metal part d,
Since the gap with the inner circumference of the solenoid is not maintained as specified and the plunger h is positioned eccentrically, the reciprocating operation of the plunger h cannot be performed smoothly, leading to a decrease in the magnetic function of the solenoid. However, it had drawbacks such as insufficient heat dissipation, a complicated structure, and difficulty in assembly.

Therefore, the present invention solves the above drawbacks by constructing a plunger unit by incorporating a plunger inside a non-magnetic pipe via an internal magnetic pole metal, and by configuring the plunger unit to be fitted onto the axis of a coil bobbin. To provide a solenoid in which the plunger is always operated smoothly, has a good heat dissipation effect, and is easy to assemble.

Embodiments of the present invention will be described in detail below with reference to illustrative drawings. In FIG. 1, reference numeral 1 denotes a non-magnetic pipe made of a non-magnetic material such as stainless steel.

Then, a cylindrical internal magnetic pole metal 2 is formed from both sides of the pipe 1.
, 3, and a plunger 6 made of a lightweight non-magnetic material such as stainless steel is movably fitted inside this by means of plunger holders 4 and 5.

Then, the non-magnetic pipe 1 and the internal magnetic pole metals 2 and 3
and plunger unit 7 by plunger 6 etc.
It consists of

8 is a return spring in the center of the plunger 6 that retains magnetism and always presses the operating body 9, which is formed as small as possible, to its original position; 10 is a plunger holder 4, 5;
A cushion ring 11 is an O-ring attached to the inner end of the cushion ring.

Further, a flange portion 12 is provided on the outer periphery of the internal magnetic pole metals 2 and 3.
．． 13 is provided so as to protrude and come into contact with the end surface of the pipe 1, and the inner end portions 14 and 15 are positioned at a distance from each other, forming a gap 16 in the middle portion.

Further, in FIG. 2, reference numeral 17 denotes a coil bobbin that integrally houses the plunger unit 7, and the outer periphery of the coil 18 is appropriately covered by the core body 20 with an opening 19 provided therein.

21 is the bracket 2 for attaching the operating lever etc. on the iron core top cover.
2 are integrally protruded.

The embodiment of the present invention has the above-mentioned configuration, and therefore, when assembling the solenoid according to the present invention, the plunger 6, the internal magnetic pole metal 2゜3, etc. are assembled inside the non-magnetic pipe 1. While constituting the plunger unit 7, this is installed inside the axis of a coil bobbin 17, and the outer periphery of the coil bobbin 17 is appropriately covered with an iron core body 20.

When the hand switch is operated to apply current to the coil 18, a magnetic force is generated in the internal magnetic pole metals 2 and 3 fitted to the inner peripheral surface of the non-magnetic pipe 1, and the actuating body 9 of the plunger is smoothly moved downward. It is what activates it.

When the hand switch is turned off, the actuating body 9 of the plunger is pushed upward by the return spring and returns to its original position.

Therefore, the lightweight plunger can be actuated at high speed via the actuating body 9.

In addition, the heat generated in the coil part is removed from the opening 1 in the core body 20.
Since it is an open type with a number 9 provided, heat is radiated to the outside.

As described above, according to the present invention, the non-magnetic pipe, the internal magnetic pole metal, and the plunger are integrally configured to form a plunger unit. Since it is securely held, the gap between the outer circumference of the plunger and the inner circumference of the internal magnetic pole metal is always kept constant and not eccentric, allowing the plunger to operate more smoothly and at higher speeds than conventional ones. It is something.

Further, the entire solenoid is easy to process and assemble.

In addition, in the conventional coil, the entire coil was fitted into a solid cylindrical yoke, making it impossible to dissipate heat and install a cooling device. It has an open structure with an opening rather than a structure that covers it with an iron core, and it has a good heat dissipation effect because a cooling device etc. can be directly attached.The overall structure is simple and the solenoid operates smoothly and reliably for a long time. It is something that can be done.

[Brief explanation of drawings]

Fig. 1 is a partially sectional front view of a plunger unit according to the present invention, Fig. 2 is a partially sectional front view of the entire solenoid according to the present invention, Fig. 3 is a plan view of the same, and Fig. 4 shows a conventional type. It is a partially sectional front view. 1... Non-magnetic pipe, 2, 3... Internal magnetic pole metal, 4, 5... Plunger receiver, 6...
... Plunger, 7 ... Plunger unit, 8 ... Return spunong, 17 ...
・Coil bobbin, 18... Coil, 19...
...opening, 20... core body.

Claims (1)

[Scope of utility model registration request] Internal magnetic pole metals 2 and 3 are respectively fitted at both upper and lower ends of the non-magnetic pipe 1 so that a portion thereof protrudes upwardly and downwardly, respectively, and furthermore, the metals 2 and 3 partially protrude. The upper and lower positions of the metals 2 and 3 are set so that a constant gap 16 is formed between each metal 2 and 3 by engaging the flanges 12 and 13 provided in the pipe 1 with the upper and lower edges of the pipe 1. At the same time, each metal 2, 3 has an actuating body 9 formed as small as possible with magnetism in the center via the upper and lower plunger holders 4, 5, respectively, and a non-magnetic A plunger unit 7 is constructed by integrally constructing a plunger unit 7 by fitting a plunger 6 manufactured to be lighter in weight so as to be able to slide up and down. 17. A solenoid characterized in that a core body 20 is removably fitted into the inner peripheral surface of the coil bobbin 17 and has an opening on the outside of the coil bobbin 17.