JPS6342487Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an improvement of a device for adjusting the operating position of a DC type solenoid.

[Background technology]

Conventionally, as shown in Figs. 1 and 2, the stationary iron core 3 was caulked to the yoke 1 as shown in Fig. 1, making it impossible to adjust the operating position, or the yoke was fixed as shown in Fig. 2. The stationary iron core 3 is screwed onto the inner bottom 2 of the coil bobbin 4, and the movable iron core 6 is reciprocated through the hollow hole 5 of the coil bobbin 4. If necessary, the screwing position of the stationary iron core 3 is moved forward and backward by screwing. This is to adjust the operating position of the In such a configuration, although the position can be adjusted, there is a risk that the threading of the stationary core may become loose due to a collision with the movable core, resulting in a change in the operating position.

[Purpose of the invention] The present invention focuses on the above-mentioned conventional situation and aims to prevent the operating position from changing during use.

[Disclosure of invention]

Examples of the present invention will be described below in Figures 1 to 2.
The description will be made with reference to FIGS. 3 to 4, in which the same parts as in the conventional example are designated by the same reference numerals.

A yoke 1 surrounds a coil bobbin 4 made of thermoplastic resin around which a coil 7 is wound, and a female thread 8 is cut into the bottom of the yoke 1. The hollow hole 5 of the coil bobbin 4 has a diameter that allows the movable iron core 6 to reciprocate, and the bottom side of the hollow hole 5 of the coil bobbin 4 has a fourth
As shown in the figure, the protrusion 9 is coaxial with the hollow hole 5,
9,9 is provided. Their imaginary inner diameters are made slightly smaller than the outer diameter of the threaded portion 10 to the extent that the threaded portion 10 formed on the outer periphery of the stationary iron core 3 screwed into the female thread 8 can be bitten into by the screwing.

Then, by changing the position where the stationary core 3 is screwed into the inner bottom 2 of the yoke 1 by screwing, the tip position of the stationary core 3 can be adjusted, and the outer diameter of the threaded portion 10 is inserted into the protrusions 9, 9, 9. As a result, the stationary core 3 is strongly fixed to the coil bobbin hollow part 5, and its fixed position does not change even when the movable core 6 moves, and the movable core 6 has high operating position accuracy. can get.

[Effect of idea]

As explained above, according to the solenoid operating position adjusting device of the present invention, the coil bobbin 4 on which the coil 7 is wound is surrounded by the yoke 1, and the yoke inner bottom 2
The tip of the stationary iron core 3 attached to the coil bobbin is inserted into the hollow hole 4 of the coil bobbin, and the movable iron core 6 is reciprocated in the hollow hole 5 to form a solenoid. At the same time, the threaded portion 8 at the tip of the stationary iron core 3 is screwed into a plurality of protrusions 9 provided on the inner periphery of the hollow hole 5 coaxially with the hollow hole 5 of the coil bobbin 4 to fix it. The stationary core 3 after adjustment is firmly fixed by the protrusion of the hollow hole, and the operating position adjustment device with high operating position accuracy can be achieved without the need for special members. Can be provided. Also, when changing the operating position after adjustment, the stationary iron core 3
Since the protrusions 9 are firmly bitten by screwing, there is no damage to the protrusions 9, so even if the stationary core 3 is placed in a new position, its fixing strength will not deteriorate.

The position, number, and height of the protrusions can be changed as necessary. When installing the internal thread 8, the inner bottom part 2 is punched out inwardly or outwardly in a countersink shape to adjust the thread length. It is also possible to increase the opposing area of the yoke 1 and the stationary iron core 3 within the scope of the present invention.

[Brief explanation of the drawing]

1 and 2 are sectional views showing a conventional example. 3 and 4 show embodiments of the present invention,
FIG. 3 is a sectional view, and FIG. 4 is a top view of the coil bobbin. 1: Yoke, 2: Inner bottom surface, 3: Stationary iron core, 4:
Coil bobbin, 5: Hollow hole, 6: Movable iron core, 7:
Coil, 8: female thread, 9: protrusion, 10: threaded part.

Claims (1)

[Scope of utility model registration request] A coil bobbin with a coil wound thereon is surrounded by a yoke, and the tip of a stationary iron core attached to the inner bottom of the yoke is inserted into a hollow hole of the coil bobbin, and a movable iron core is reciprocated in the hollow hole to form a solenoid. The engraved threaded portion is screwed into the yoke, and the threaded portion at the tip of the static core is screwed into multiple protrusions provided on the inner periphery of the hollow hole coaxially with the hollow hole of the coil bobbin to fix it. A solenoid operating position adjustment device characterized by: