JPH0214165Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to a solenoid, and more specifically, to an improvement in the mounting structure of a bobbin around which a coil is wound in an AC solenoid to a fixed iron core.

(Prior Art) As shown in FIG. 6, a bobbin fixed core mounting structure for a conventional AC solenoid involves inserting a bobbin 52 wound with a coil 51 into the coil housing space of a fixed core 50 from the side. , a mounting piece 53 made of a non-magnetic material such as a stainless steel plate is inserted into the cylinder 54 of the bobbin 52, and one end 53a of the mounting piece 53 is inserted into the cylinder 54 of the bobbin 52.
After bending the mounting piece 53 into a U-shape and locking it to the continuous portion 56 of the side plate 55 of the fixed iron core 50, the other end 53b of the mounting piece 53 is bent into an L-shape and locking it to the outer surface of the fixed iron core 50. are widely adopted.

(Problems to be Solved by the Invention) However, according to the above conventional structure, the work of inserting the mounting piece 53 into the bobbin 52 and bending the end is difficult to automate and is a detailed work that is time-consuming. Furthermore, the number of parts was large and it was complicated. There is also a structure in which a wedge-shaped connector with a preventive structure is inserted between the bobbin collar and the fixed iron core instead of the above-mentioned mounting piece 53, but in this case as well, the work is troublesome and there are many parts. There's a problem.

This idea solves the above-mentioned conventional drawbacks.
The present invention aims to provide a solenoid that has a simple structure, has a small number of parts, and can easily fix a bobbin to a fixed iron core.

(Means for solving the problem) However, the solenoid of this invention has a locking piece protruding from the outside of the collar of the bobbin, and the bobbin with the coil wound thereon is placed laterally in the coil housing space of the fixed core. The inner surface of the locking piece is brought into contact with the side plate of the fixed iron core, and the clamping plate part facing the both side plates, the top plate part connecting the tops of both clamping plate parts, and the clamping plate part. Between the inner surface of the clamping plate of the fixture, which has a mounting leg connected to the base, and the outer surface of the side plate of the fixed core and the locking piece, the fixed core clamp and the locking plate are provided. This is a solenoid characterized by interposing an elastic body for one-sided pressing.

(Function) In the solenoid of this invention, the elastic body clamped by the clamping plate portion of the fixture elastically supports the fixed core, and the elastic body presses the outer surface of the locking piece with elastic force, so that the elastic body presses against the outer surface of the locking piece. Since the locking piece is pressed against the side plate of the fixed iron core, the bobbin is positioned and fixed to the fixed iron core at a position where the inner surface of the locking piece abuts the side plate.

(Embodiment) An embodiment of this invention will be described below with reference to FIGS. 1 to 5.

In FIG. 1, reference numeral 1 denotes a fixed core, the side surface of which is approximately C-shaped, and has tabs 3 protruding from both sides of the outermost side plate 2 of the laminated core. Reference numeral 4 indicates a corner wire ring, but illustration thereof is omitted in figures other than FIG. 1. Further, illustration of rivets for assembling the fixed iron core 1 is also omitted. Reference numeral 5 designates a bobbin made of synthetic resin, which has flanges 7 and 8 fixedly attached to one end 6a and the other end of the square tube 6, and has a substantially square bar-shaped locking piece 9 protruding from the outside of the collar 7. It is fixed in place. A part of the square tube 6 protrudes outward from the collar 7 to form a protruding tube portion 6b, and this protruding tube portion 6b is connected to the opposite end 1 of the fixed iron core 1.
It has an outer width that can be inserted with a small gap between a and 1a. It is preferable that the locking piece 9 is integrally molded with each part of the bobbin 5, but it can also be bonded to the protruding cylindrical portion 6b and the collar 7. In addition, in FIG. 2, reference numeral 10 denotes a rubber elastic body for elastically supporting the fixed core 1 and attaching it to the side plate 2 of the fixed core 1.
and a locking piece contacting surface 12 that contacts the outer surface 9a of the locking piece 9 of the bobbin 5, and 13 is a step for preventing the fixed iron core 1 from shifting laterally. 14 is a window for inserting the bobbin 5, 15 and 16 are recesses for placing fingers for attaching and detaching the elastic body 10 to the fixed iron core 1, and a slit for inserting the ear piece 3 is provided at the corner of this recess. 17 is drilled. Furthermore, the third
In the figure, reference numeral 20 denotes a fitting for attaching the fixed core 1 of the solenoid to a mounting part such as a seat plate fixed to the bottom of the water tank of a washing machine. The tops of the opposing clamping plates 21 and 22 are connected by the top plate 23, and the mounting legs 24 and 2 are connected to the bases of the clamping plates 21 and 22.
5 are connected in a row, and is made by bending and forming a mild steel plate into a substantially U-shape. 26 and 27 are the clamping plate portion 2
1 and 22 are convex portions for accommodating coils. Further, 28 is an outlet for the coil outlet wire 40a formed on one side of the holding plate portion 21. Each clamping plate part 2
1, 22 and the edges of the top plate part 23, the elastic body 1
Bending pieces 29, 30, and 31 for preventing slippage are provided in succession. Also, 35 is a movable iron core, 3
Reference numeral 6 designates a hook portion formed on the side plate 37 of the movable iron core for hooking an operating member.

To assemble the above parts, first, the coil 40 is wound around the bobbin 5 shown in FIG. Insert the inner surface 9 of the locking piece 9
b is brought into contact with the side plate 2. Next, the elastic body 10 is attached to the side plate 2 of the fixed iron core 1 as shown by the arrow in FIG. That is, by elastically deforming the elastic body 10 and inserting each lug 3 into each slit 17, each elastic body 10 is integrally latched on both sides of the fixed iron core 1, as shown in FIG. Push this adhered article between the clamping plates 21 and 22 of the fixture 20, and as shown in FIG.
4 and 25 are fixed to a mounting portion 41 such as a seat plate with screws or the like, installation of the fixed iron core 1 is completed.
Then, by inserting the movable iron core 35 into the rectangular tube 6 of the bobbin 5, assembly of the solenoid is completed.

Attachment part 4 of fixed iron core 1 using the above-mentioned attachment tool 20
1, the clamping plate parts 21, 22
The fixed core 1 is elastically supported by the elastic body 10 clamped by the elastic body 10, and transmission of vibrations and shocks such as those caused by a collision of the movable core 35 to the mounting portion 41 is suppressed, and as shown in FIG. The elastic body 10 clamped and pressed by the plate portion 21 presses the locking piece 9 via the locking piece contact surface 12 and comes into pressure contact with the side plate 2 of the fixed iron core 1, so that the bobbin 5 is fixed to the fixed iron core 1. Ru.
It is preferable to provide a gap 46 between the side surface 45 of the protruding tube part 6b on the side of the rectangular tube 6 to which the locking piece 9 is not attached and the elastic body 10, as shown in FIG. As long as the pressing force of the elastic body 10 is within a sufficiently smaller range than the pressing force of the elastic body 10 on the locking piece 9, the elastic body 10 may be brought into contact with the side surface 45 without the gap 46.

This invention is not limited to the above embodiments; for example, the locking piece 9 may have a shape other than that described above, and the locking piece 9 may be provided protrudingly on the outer surface of the collar 8 instead of being provided on the outer surface of the collar 7. Alternatively, it may be provided on both the ribs 7 and 8. Furthermore, the shapes of the elastic body 10 and the fixture 20, the structure for hooking the elastic body 10 to the fixed core 1, etc. may be other than those described above.

(Effects of the invention) As explained above, according to this invention, the bobbin can be fixed to the fixed iron core using the elastic body for vibration-proof support of the solenoid without using any special mounting pieces or connectors. The structure of the solenoid is simple, requiring fewer parts, and the work of fixing the bobbin can be completed by attaching it to the solenoid mounting section, which reduces the number of man-hours and contributes to reducing the cost of the solenoid. It is something to do.

[Brief explanation of the drawing]

1 to 3 are perspective views showing the structure and assembly procedure of the solenoid of this invention, FIG. 4 is a front view of the solenoid in the assembled state, and FIG. 5 is a sectional view taken along the line A-A in FIG. 4. FIG. 6 is a perspective view showing an example of a conventional solenoid. 1...Fixed iron core, 1b...Coil accommodation space, 2
...Side plate, 5...Bobbin, 7...Brim, 9...Locking piece, 9a...Outer surface, 9b...Inner surface, 10...
... Elastic body, 11 ... Contact surface, 12 ... Locking piece contact surface, 20 ... Mounting tool, 21 ... Holding plate part, 22 ...
...Holding plate part, 23...Top plate part, 24...Mounting leg part, 25...Mounting leg part, 35...Movable iron core, 40
...Coil, 41...Mounting part.

Claims (1)

[Scope of utility model registration request] A locking piece is protruded from the outside of the brim of the bobbin, and the bobbin with the coil wound thereon is inserted from the side into the coil housing space of the fixed iron core, and the inner surface of the locking piece is attached to the side plate of the fixed iron core. The clamping part of the fixture comprises a clamping plate part that abuts and faces the both side plates, a top plate part connecting the tops of the two clamping plate parts, and a mounting leg part connected to the base of the clamping plate part. between the inner surface of the plate part and the outer surface of the side plate of the fixed iron core and the locking piece,
A solenoid characterized in that an elastic body is interposed for holding the fixed iron core and pressing the locking piece.