JPH04120206U - latching solenoid - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to easily assemble a latching solenoid and improve the strength of the plunger guide. [Configuration] Coil 2 is housed in yoke 1, and
In a latching solenoid, a plunger 7 that moves forward and backward is inserted into a vertical hole provided at the center of the solenoid, and a latching magnet plate 15 is disposed on the outer periphery near the lower end opening of the coil 2. The coil body 2a is integrally formed with a bobbin around which the coil body 2a is wound, and the coil body 2a is wound around the guide 4, and a pole core 5 is embedded in the upper part of the guide 4.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a latching solenoid.

0002

[Conventional technology]

Conventionally, the latching solenoid installed on automatic water supply valves etc. is as shown in Figure 6. , a bobbin 41 on which a coil is wound is housed in a yoke 40, and a bobbin 41 is placed in the center of the coil. A pole core 43 is fitted and fixed in the upper part of the cylindrical plunger guide 42. Insert the plunger 44 that slides through the plunger guide 42 toward the Perhaps a return spring 45 is installed between the pole core 43 and the plunger guide 42. It is set up. Furthermore, a rubber is attached to the outer periphery of the plunger guide 42 near the lower end opening. A magnetic plate 46 for clipping is arranged and fixed.

0003 In such a structure, the plunger 44 absorbs the electric current generated by energizing the coil. Magnetic absorption by magnetic force and magnetic force by the latching magnet plate 46 made of a permanent magnet, etc. It operates by moving forward and backward in response to the action.

0004

[Problem that the idea aims to solve]

However, the latching solenoid with the above structure has the following drawbacks. Ta. That is, when installing the pole core 43 inside the plunger guide 42, the same guide 42 Insert the pole core 43 inside, and then caulk the pole core fixing plate 47 to secure the pole core. A43 was integrally connected. However, this work is done using tools. In addition to being very complicated, it is difficult to use synthetic wood when caulking the pole core fixing plate 47. If this stress is applied to the plunger guide 42, which is made of oil, and the guide 42 is damaged, There was a problem.

[0005] Additionally, when assembling the latching solenoid, place the coil around bobbin 41. Then, insert the plunger guide 42 into this bobbin and assemble it. However, it was very troublesome and could not be done easily.

[0006] The present invention provides a latching solenoid that can solve the above problems. The purpose is to

[0007]

[Means to solve the problem]

This invention houses a coil in a yoke, and a cylindrical plastic plate installed in the center of the coil. Insert the plunger into the plunger guide so that it can move forward and backward, and then insert the plunger into the lower end of the coil. A latching solenoid with a latching magnet plate on the outer periphery near the opening. It was confirmed that the pole core was installed buried in the plunger guide. This relates to a characteristic latching solenoid.

[0008]

【Example】

If the embodiment of the present invention is explained in detail based on the drawings, as shown in Fig. 1, The latching solenoid A of this invention is installed in the water supply piping to open and close the valve. I'm doing it.

[0009] In Figure 1, a is the water supply pipe to the toilet bowl, and the pipe a is connected from the water supply source side to the water supply pipe a. Toward the toilet side, in this order: water stop valve b, flush valve c, and vacuum breaker d is attached. In such a configuration, the latching solenoid A However, flush valve c is used as a driving actuator, and the same solenoid The door A opens and closes the valve seat Ba with the valve body 7a made of a diaphragm.

0010 The overall structure of such latching solenoid A will be explained with reference to FIGS. 2 to 4. First, a yoke 1 with a gate-shaped cross section is provided on the outermost side. Inside is a molded-in coil body 2a molded inside with polyester resin. A cylindrical coil 2 in the form of a coil is housed therein.

[0011] 3 shows the mold part, where the upper, lower, and peripheral sides of the coil body 2a are coated. The coil 2 is molded into a cylindrical shape.

0012 In addition, a vertical hole is formed in the center of the coil 2, and a cylindrical plunger is inserted into the vertical hole. - A guide 4 is inserted through the guide 4, and a pole core 5 is provided on the upper part of the guide 4. ing. Note that 6 indicates a fixing plate provided at the upper end of the yoke 1.

[0013] Further, the plunger guide 4 has its tip formed on the lower holding plate 1a of the yoke 1. It protrudes downward from the through hole. Also, there is a plug inside the plunger guide 4. A plunger 7 is inserted so as to be slidable or movable back and forth in the axial direction.

[0014] Moreover, as shown in FIG. 3, a coil 2 with the above-mentioned coil body 2a buried inside The lower molded part is made thicker, and a rectangular permanent shape is formed from the left and right sides of the thicker part. It forms an insertion space S into which a latching magnet plate 15 made of a permanent magnet is inserted. Ru.

[0015] Also, insert the latching magnet plate 15 into the insertion space S and align it with the coil 2. When attaching the body, insert the tip edge of the latching magnet plate 15 into the plunger as much as possible. Preferably, the insertion space S is formed in the lower part of the coil 2 so as to be close to the guide 4. child As a result, the magnetic force generated from the latching magnet plate 15 can be effectively transferred to the plunger. -7. Note that 7a is a valve body provided at the lower end of the plunger 7; B shows the solenoid attachment part of the latching solenoid A to the flush valve c.

[0016] The present invention provides a latching solenoid A having the above structure with a plunger guide. It has this feature in the structure of No. 4, and this structure will be explained in detail. That is, as shown in Figure 2 The plunger guide 4 and the bobbin around which the coil body 2a is wound are integrally constructed. Then, wrap the coil body 2a around the guide 4, and also wrap the coil body 2a around the guide 4. The pole core 5 is installed in the section in a buried state.

[0017] In this embodiment, upper and lower flanges 2c and 2d are protruded on the outer peripheral surface of the plunger guide 4. The coil body 2a is wound between the flanges 2c and 2d.

[0018] In addition, in FIG. 3, the pole core 5 is formed into a thin cylindrical shape, and the cylindrical plunger - The same core 5 is buried in the guide 4, and the upper end of the pole core 5 is protruded. The upper end thereof is also buried in the fixing plate 6.

[0019] With this configuration, the plunger guide 4 has a bobbin around which the coil body 2a is wound. Since the guide 4 and the bobbin are configured integrally, the work of connecting the guide 4 and the bobbin has been removed. , it can be easily assembled, and the pole core 5 is included in the guide 4. Since the guide 4 is buried, the strength of the guide 4 is improved and damage to the guide 4 is prevented. can do.

[0020] Further, as shown in FIG. 2, the plunger 7 has a spring housing at its upper end. A hole 10 is formed, and a return spring 11 is housed in the hole 10. Ma In addition, the return spring 11 has its upper end brought into contact with the lower end surface of the fixed pole core 5. The plunger 7 is always urged in the advancing direction, that is, in the valve closing direction.

[0021] In addition, as shown in Fig. 2, the lower outer circumferential surface of the coil 2 has a connection plate with the coil main body 2a. A connector 12 is provided to protect the connecting part of the lead wire 13. In this embodiment, the vector 12 is integrally molded with the coil 2. In addition, in Figure 2 The lower holding plate 1a of the yoke 1 is formed to protrude laterally to accommodate a flap for mounting the solenoid. 1b is formed, and 1c indicates a mounting hole.

[0022] In addition, the plunger guide 4 is made of non-magnetic material and can also be made of metal. However, as another example, it can be made of synthetic resin to prevent rust etc. .

[0023] Moreover, FIG. 5 shows another embodiment of the latching solenoid A, in which the plunger A bobbin 16 for winding the coil 2a is provided around the coil 2a, and the bobbin 16 is , as shown in FIG. The coil body 2a is wound between each flange 18,19.

[0024] Furthermore, in this embodiment, a pole core 5 is provided on the upper part of the plunger guide 4. The strength of the guide 4 can be improved by embedding it. Also, plunger The guide 4 can also be made of synthetic resin to prevent rusting and the like.

[0025] Next, the latching solenoid A having the above configuration is operated to open and close the water supply valve. This will be explained with reference to the case where it is used. Figure 3 shows the state when the valve is closed, and the coil of coil 2 The main body 2a is not energized, and the plan is activated by the magnetic force of the latching magnet plate 15. The jar 7 is sucked downward, and the valve body 7a closes the valve seat Ba. Next, the coil book Power is applied to the body 2a, and the pole core 5 is aligned with the line of magnetic force from the latching magnet plate 15. When excited in one direction, the upper end of the plunger 7 and the lower end of the pole core 5 are different from each other. pole core 5 resists the biasing force of the return spring 11 and pushes the plunger 7 to open the valve seat Ba.

[0026] Even if the above-mentioned power supply is cut off and the excitation to the pole core 5 is stopped, the latching does not occur. The lines of magnetic force from the magnet plate 15 for yoke 1, pole core 5, plunger 7 , since it has reached the latching magnet plate 15, the above plunger 7 is attracted. The state is maintained, and the latching solenoid A maintains the open state.

[0027] Next, a current in the opposite direction to that described above is applied to the coil body 2a to latch the pole core 5. When excited in the opposite direction to the line of magnetic force from the magnetic plate 15, the same pole core 5 The lower end and the upper end of the plunger 7 are of the same polarity and repel each other, causing the plunger to The valve seat Ba is closed by moving the shutter 7 away from the valve seat Ba. And this energization Even when the plunger 7 is stopped, the valve body 7a at the lower end of the plunger 7 is not latched, as shown in FIG. The suction force of the magnet plate 15 and the urging force of the return spring 11 press the The water valve remains closed.

[0028] In this way, the latching solenoid A according to the present invention is suitable for the automatic water supply valve described above. In addition, it can be effectively used for other purposes, such as hot water mixing equipment. It is something that

[0029]

[Effect of the idea]

In this invention, the pole core is embedded in the plunger guide provided at the center of the coil. Because of this, the installation work of the pole core can be removed and the latching sole can be easily solved Not only can the noid be assembled, but also the strength of the guide itself can be improved. This can prevent damage to the guide.

[0030] In addition, the plunger guide is integrated with the bobbin for winding the coil. This eliminates the work of connecting the guide and bobbin, making assembly easier. It can be carried out.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a state in which a latching solenoid of the present invention is attached to a flush valve.

FIG. 2 is a perspective view of a latching solenoid.

FIG. 3 is a cross-sectional side view of the latching solenoid.

FIG. 4 is a cross-sectional side view of the latching solenoid.

FIG. 5 is a cross-sectional side view showing another embodiment of the latching solenoid.

FIG. 6 is a cross-sectional side view showing a conventional latching solenoid.

[Explanation of symbols]

A Latching solenoid 1 yoke 2 coils 4 Plunger guide 5 Pole core 7 Plunger 15 Latching magnet plate

Claims (1)

[Scope of utility model registration request] Claim 1: A coil 2 is housed in a yoke 1, and a cylindrical plunger guide 4 provided at the center of the coil 2 is provided with a cylindrical plunger guide 4.
The plunger 7 is inserted so that it can move forward and backward, and a latching magnet plate is attached to the outer periphery near the lower end opening of the coil 2.
15, the latching solenoid is characterized in that a pole core 5 is embedded in the plunger guide 4.