JPH0626214U - solenoid - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] In a solenoid that mounts a resin-sealed coil in the space where the magnetic case and the magnetic lid are formed, without applying excessive stress to the resin-sealed coil. The purpose of the present invention is to reliably prevent backlash, to obtain a structure that is easy to manufacture and has excellent quality. [Structure] A protrusion is provided on the outer peripheral portion of the resin-encapsulated coil, and the protrusion and the inner wall of the magnetic case contact each other to prevent looseness of mounting.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the structure of a solenoid for mounting a resin-sealed coil in a magnetic material case.

[0002]

[Prior art]

 Conventionally, a solenoid having a fixed iron core, a movable iron core, and a coil as its basic constituent elements has been put into practical use. It is used in a wide range of fields depending on its structural form. In addition to the general bobbin type structure of the coil, which is one of the base components, the resin-sealed coil made by molding the coil with nylon resin or the like is for automotive use, which is highly demanded for waterproofness and vibration resistance. It is used for etc.

FIG. 1 is a sectional structural view of a conventional solenoid valve. 1 is a resin-sealed coil, 2 is a magnetic case, 3 is a magnetic lid-like body, 4 is a movable iron core, 5 is a ball, 6 is a seat valve, 7 is a seal part, and 8 is a non-sheet. A magnetic pipe, 9 is a protrusion on the top of the sealing resin, and 12 is a spring. The magnetic lid 3 is combined with the magnetic case 2 to form a fixed iron core which is a basic component of the solenoid described above.

(2) FIG. 1 shows a normally closed solenoid valve, in which a ball 5 fixed to the tip of the movable iron core 4 normally operates a seat valve 6 by pressurizing a spring 12. It is closed. When the resin-sealed coil 1 is excited, the movable iron core 4 is attracted toward the magnetic lid-like body 3 against the spring 12, and the ball 5 rises to open the seat valve 6. , Flow the fluid in the direction of the arrow in the figure. Next, when the excitation of 1 is released, the spring 12 returns to the closed state.

As described above, in the structure in which the resin-sealed coil 1 is mounted in the space formed by the fixed iron core formed of the magnetic body case 2 and the magnetic lid-shaped body 3, the resin-sealed coil 1 is placed in the space where the resin-sealed coil 1 is formed. The mounting play at the time of accommodation was prevented by the contact of the protrusion 9 provided on the top of the sealing resin 1 with the magnetic lid 3. The “contact” mentioned here refers to a contact state of the protrusion 9 that eliminates mounting backlash, including a state in which part or all of the protrusion 9 is crushed or scraped. (The same shall apply in the following description.)

3A and 3B are structural views of a conventional resin-sealed coil. FIG. 3A is a plan view, FIG. 3B is a front view, and FIG. 3C is an enlarged sectional view taken along line AA ′. The same reference numerals as those in the previous figures represent the same parts, and 11 is a coil lead-out part of the resin-sealed coil 1.

The resin-sealed coil 1 is provided with projections 9 having a triangular or semi-circular cross section on the entire circumference of the sealing resin top or a part of the circumference.

As shown in FIG. 1, the resin-encapsulated coil 1 as shown in FIG. 3 is slightly larger in height than the clearance when it is housed in the space where the magnetic case 4 and the magnetic lid 3 are formed. The protrusions 9 were crushed and brought into contact with each other to prevent looseness.

[0009]

[Problems to be solved by the device]

 a. Since the protrusion 9 has high rigidity, the magnetic lid 3 is easily lifted when the resin-sealed coil 1 is housed. (3) b. Since the protrusion 9 having a high rigidity is forcibly pushed in, stress may be applied to the resin-sealed coil 1 and the waterproof insulation may be impaired. For these reasons, it is technically difficult to design the shape, size, material and the like of the projection 9 that prevents the looseness of mounting and is free from the risk of a and b. Further, as a mounting backlash preventing means which does not depend on the protrusion 9, there is a method of applying a silicone resin or the like to the top of the resin coil 1, but there is a problem in workability and quality.

[0010]

[Means for Solving the Problems]

 The present invention is a solenoid configured to mount a resin-sealed coil in a space formed by a magnetic body case and a magnetic lid-shaped body. This solenoid is characterized in that the backlash of the resin-sealed coil is prevented by the contact with the inner wall of the magnetic case.

[0011]

【Example】

 2 is a sectional structural view showing an embodiment of the present invention, and FIG. 4 is a structural view showing an embodiment of a resin-sealed coil housed in the solenoid of FIG. 2, (a) is a plan view, and (b) is a plan view. ) Is a front view. In all cases, the same reference numerals as those in the previous figures represent the same parts.

In FIG. 4, reference numeral 10 denotes a protrusion forming an essential part of the present invention, which is provided on the outer peripheral portion of the sealing resin of the resin sealing coil 1 unlike the protrusion 9 of the conventional structure. In the embodiment of FIG. 4, three protrusions 10 made of the same nylon resin as the sealing resin are provided on the outer peripheral portion. As an example of the size of the protrusion 10, the height is about 0.1 mm and the axial length is about 5 mm. Further, for the convenience of molding, the end of the projection 10 is formed so as to reach the top (upper surface or lower surface) of the sealing resin. The number and shape of the protrusions 10 are not limited, but three or more protrusions are preferably triangular or semicircular. Further, the axial length, the number, the location, etc. can be arbitrarily selected depending on the circumstances such as molding, manufacturing, and design.

When the resin-sealed coil 1 shown in FIG. 4 is housed in the space (4) formed by the magnetic case 2 and the magnetic lid 3 of the solenoid valve shown in FIG. The clearance between the outer periphery of 1 and the inner wall of the magnetic case 2 is equal to or larger than the clearance, and the workability of housing 1 is not impaired. That is, when 1 is accommodated, the whole or a part of the protrusion 10 is inserted toward the inside of the magnetic case 2 so as to be crushed or scraped from the axial direction. As a result, 1 and 2 come into contact with each other at the portion of the protrusion 10, and a housing without play is provided in the space formed by 2 and 3.

The structure of the embodiment of the present invention can be modified, deleted, added, changed, etc. within the scope of the gist of the present invention. Also, the names of the respective parts have the same function even if, for example, the magnetic lid-shaped body is read as a fixed iron core, it is of course included in the gist of the present invention.

[0015]

[Effect of device]

 As explained above, the mounting backlash of the solenoid that houses the resin-sealed coil in the fixed iron core is reliably prevented, and a structure that is excellent in workability and quality is realized, and as a result, temperature change, vibration, etc. It is used in various solenoids, including solenoid valves for vehicles and construction machinery used in the environment, and its industrial effect is significant.

[Brief description of drawings]

FIG. 1 is a sectional structural view of a conventional structure.

FIG. 2 is a sectional structural view of an embodiment of the present invention.

FIG. 3 is a structural diagram of a resin-sealed coil having a conventional structure, (a)
Is a plan view, (b) is a front view, and (c) is an enlarged cross-sectional view taken along line AA '.

FIG. 4 is a structural view of a resin-sealed coil used in the structure of the present invention, (a) is a plan view, and (b) is a (5) front view.

[Explanation of symbols]

 1 resin-sealed coil 2 magnetic case 3 magnetic lid 4 movable iron core 5 ball 6 sheet valve 7 seal part 8 non-magnetic pipe 9 1 sealing of resin top protrusion 10 1 sealing Stopping resin Peripheral part protrusion 11 1 Coil lead-out part 12 Spring

Claims (1)

[Scope of utility model registration request] 1. A solenoid configured to mount a resin-sealed coil in a space formed by a magnetic case and a magnetic lid-like body, wherein a protrusion is provided on an outer peripheral portion of the resin-sealed coil,
A solenoid characterized in that the projection and the inner wall of the magnetic material case are in contact with each other to prevent the resin-sealed coil from being loosened.