JPH0625679U - Solenoid valve assembly structure - Google Patents

Abstract

(57) [Summary] [Purpose] Assemble the parts of the electromagnetic mechanism in the outer case,
When tightening the ends by caulking, it is possible to absorb the maximum and minimum values so that the caulking does not become too large or too small, and it is compact, easy to assemble and manufacture, and has high performance. It is possible to provide a compact solenoid valve at low cost. [Structure] An engaging projecting piece that can be bent inward is provided at the lower end of the outer case with a bending point as a fulcrum, and the expandable and contractible stop ring with the inner surface interposed is provided within the absorption dimension range depending on the bending angle. It was made to fluctuate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an assembly structure of a solenoid valve used as an opening / closing valve for gas appliances and other gas appliances.

[0002]

[Prior art]

 The structure of the main part of the solenoid valve is one in which a coil bobbin wound with an electromagnetic coil is assembled together with parts such as a yoke and a plunger in a cylindrical outer case as an integral structure. Conventionally, such a solenoid valve is generally locked by fitting an end plate on the lower end open side of the outer case and caulking the case edge as shown in FIG.

[0003]

[Problems to be solved by the device]

 However, if the caulking is too strong, the stored components will receive a compressive load, and especially if an excessive compressive load is applied to the coil winding, the electromagnetic effect will be adversely affected, and the coil winding will be disconnected. There is a problem that occurs. Further, if the caulking is weak, rattling occurs, which causes a problem that the position of the electromagnetic coil moves and the operation of the electromagnetic valve changes.

A proper mounting position of the electromagnetic coil is a point where the center of the coil bobbin is near the end face of the yoke (0-0 line in FIG. 5) as shown in FIG. This changes the magnetic efficiency and operating voltage.

Further, as shown in FIG. 5, a case material such as a wave washer is inserted in the case of the solenoid valve to apply elasticity to the coil bobbin to absorb the maximum and minimum values of the coil dimension L. At the same time, a method to prevent rattling is also implemented, but there is a problem that it is not possible to obtain a small and efficient solenoid valve because the external dimensions of the solenoid valve are large, and manufacturing and assembly are very troublesome. However, there is a problem that the cost becomes high.

The present invention has been made in view of the above problems of the prior art. The object of the present invention is to absorb the maximum and minimum values of the coil size to eliminate rattling, It is intended to provide a solenoid valve which is small in size, has high magnetic efficiency, and is advantageous in terms of cost with a simple structure.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the structure for assembling an electromagnetic valve according to the present invention has a coil bobbin 2 around which an electromagnetic coil 1 is wound, a yoke 4 fixed to an upper part of a hollow vertical hole 3 thereof, and a yoke facing each other. A solenoid valve in which a plunger 5 that slides up and down by a magnetic force and a valve body 7 that opens and closes a passage to a valve opening 6 at the plunger end are assembled into a cylindrical outer case 8 made of magnetic metal as an integral structure. In the outer casing 8, there is a locking step portion 9 serving as a bending point at the lower end of the exterior case 8 to integrally form an inwardly bendable engaging projection 10 for caulking, and the engaging projection 10 An elastic stop ring 12 having a slit portion 13 is interposed between the end plate 11 and the end plate 11 fitted in the lower end opening portion of the outer case, and the locking projection 10 is tightened by caulking.

The outer diameter D of the elastic stop ring 12 is preferably larger than the inner diameter C of the outer cover 8.

[0009]

[Action]

 FIG. 1 shows a plunger type solenoid valve. In the figure, since the electromagnetic force does not work when the electromagnetic coil 1 is not energized and no voltage is applied, the plunger 5 is pushed downward by the spring 14, so that the valve body 7 at the lower end of the plunger is the valve of the valve opening 6. Although it is pressed against the seat and the valve port 6 is closed, when a voltage is applied to the coil 1, an electromagnetic force is generated between the yoke 4 and the plunger 5, the plunger 5 moves upward and is attracted to the yoke 4. It Therefore, the valve body 7 separates from the valve seat, and the valve opening 6 opens.

The coil bobbin 2, the plunger 5, the plunger guide 15, etc. are assembled in the outer case 8, and the end plate 11 is fitted into the open portion of the case. Next, when the stop ring 12 is fitted onto the inner peripheral surface of the engaging projection 10 provided on the edge of the case, the stop ring 12 is stopped by the spring pressure, so that the parts inside the outer case 8 are temporarily fixed. Held in.

When the engaging projection 10 is bent inward, the stop ring 12 is changed according to the bending angle θ as shown in FIG. 2A or 2B to absorb the height dimension h. Be done. Therefore, when rattling occurs between the components including the coil bobbin 2, this rattling can be absorbed.

[0012]

【Example】

 Examples will be described with reference to the drawings.

As shown in FIG. 1, the end plate 11 is integrally formed with the valve port 6, the gas inlet 16, the gas outlet 17, etc., but is also used as a single end plate. It may consist of

The outer case 8 is formed by forming a magnetic metal into a cylindrical shape and opening one end (lower end) and closing the other end (upper end). The yoke 4 is integrally formed on the inner surface of the end plate, or A separate object is provided integrally.

The engagement protrusion 10 is formed so as to integrally protrude from the lower end portion of the outer case 8, but the plate thickness is reduced, and a notch or a notch is formed at a portion serving as a bending point. The locking step 9 is formed.

The stop ring 12 is a circular ring having a cutout portion 13 that is partially cut using a round wire material having a spring property such as a piano wire and a mesh wire. The outer diameter D 1 of the free length of this ring is made larger than the inner diameter C of the outer case 8 and is set to satisfy the relationship of ΦD> ΦC. FIG. 3A shows the case where the outer diameter dimension D of the ring is the maximum, and in this case, the spacing S between the cut portions 13 is also the maximum. However, when the engagement projection 10 is reduced by crimping, the outer diameter becomes D'as shown in FIG. 3 (b), and the interval between the slits 13 becomes minimum like S '.

[0017]

[Effect of device]

 Since the present invention is configured as described above, the parts such as the coil bobbin, the plunger, and the end plate are assembled in the outer case, and after the storage, the engaging protrusions at the ends are caulked to make the outer diameter of the stop ring. By changing the locking position, the maximum and minimum values of the coil size can be made appropriate and the magnetic efficiency can be improved. In addition, since abnormal load during crimping is prevented from being applied to internal parts, it is possible to eliminate adverse effects on the coil winding and reduce stress.

Further, since it is small and easy to assemble, it is possible to provide a high-performance small solenoid valve at low cost.

[Submission date] November 2, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

When the engaging projection 10 is bent inward, the stop ring 12 is changed according to the bending angle θ as shown in FIG. 2 or 3, so that the height h is absorbed. Therefore, when rattling occurs between the components including the coil bobbin 2, this rattling can be absorbed.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

The stop ring 12 is a circular ring having a split portion 13 that is partially cut using a spring-shaped round wire material such as a piano wire and a mesh wire. The outer diameter D of the free length of the ring is set to be larger than the inner diameter C of the outer case 8 and set to the relationship of ΦD> ΦC. FIG. 7 shows the case where the outer diameter dimension D of the ring is the largest, and in this case, the interval S between the cut portions 13 is also the largest. However, when the engagement projection 10 is reduced by crimping, the outer diameter becomes D ', and the interval between the slits 13 becomes minimum as S', as shown in FIG.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an example of a solenoid valve embodying the present invention.

2 (a) and 2 (b) are explanatory views of the operation of the stop ring and the end plate tightening portion.

3 (a) and 3 (d) are plan views when the stop ring is enlarged or reduced.

FIG. 4 is a cross-sectional view of a conventional solenoid valve.

FIG. 5 is a cross-sectional view of a conventional solenoid valve.

[Explanation of symbols]

 1 Coil 2 Coil Bobbin 4 Yoke 5 Plunger 6 Valve Port 7 Valve Body 8 Outer Case 9 Locking Step 10 Engaging Projection 11 End Plate 12 Stop Ring 13 Cut Section

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] November 2, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Added

[Correction content]

[Figure 3]

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Added

[Correction content]

[Figure 6]

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Added

[Correction content]

[Figure 7] ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] November 2, 1992

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

FIG. 2 is an explanatory view of the action of the stop ring and the crimping portion of the end plate, showing the case of the maximum coil size.

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

FIG. 3 is a diagram for explaining the action of the stop ring and the end plate tightening portion, showing the case where the coil dimension is the minimum value.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

FIG. 6 is a plan view when the stop ring is reduced.

[Procedure correction 6]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

FIG. 7 is a plan view of the stop ring when it is enlarged.

Claims (2)

[Scope of utility model registration request] 1. A coil bobbin 2 around which an electromagnetic coil 1 is wound.
A yoke 4 fixed to the upper part of the hollow vertical hole 3, a plunger 5 facing the yoke and sliding up and down by magnetic force, and a valve body 7 for opening and closing a passage to a valve opening 6 at the plunger end. And a cylindrical outer case 8 made of magnetic metal
In the solenoid valve assembled as an integral structure inside, an engaging projection 10 for caulking which is bendable inwardly is integrally provided at the lower end of the outer case 8 with a locking step 9 serving as a bending point. By forming an elastic stop ring 12 having a slit 13 between the engaging projection 10 and the end plate 11 fitted to the lower end opening of the outer case, the engaging projection 10 is crimped. Solenoid valve assembly structure characterized by being tightened. 2. The solenoid valve assembling structure according to claim 1, wherein the outer diameter D of the elastic stop ring 12 is larger than the inner diameter C of the outer cover 8.