JP3674899B2 - Solenoid actuator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a solenoid actuator having a rod extended to a plunger, which is fixed to a solenoid support body having a rod stopper and performs a suction operation by solenoid excitation and a return operation by solenoid demagnetization. The present invention relates to an improvement of a rod for buffering a sound generated when a rod and a rod stopper collide with each other during operation.
[0002]
[Prior art]
Conventionally, a copper wire (for example, enameled wire) is resin-fixed to a solenoid support of a resin-molded member (for example, ABS resin) having a rod stopper so as to perform a suction operation by solenoid excitation and a return operation by solenoid demagnetization. A solenoid wound around a cylindrical bobbin of a molded member (for example, ABS resin), connected to a terminal piece (for example, a copper plate) and surrounding a yoke (for example, an iron plate), and a plunger of a magnetic member provided in the solenoid; A rod of a resin molded member (for example, ABS resin) extended to the plunger, and a compression coil spring (for example, stainless steel) that is mounted between the solenoid and the rod and constantly urges and urges both of them. In order to buffer the collision noise between the rod and the rod stopper that occurs during return operation, Soft elastic member to the rod stopper abutting end face of the rod (e.g., silicone rubber) or affixed to, those of the soft elastic member and measures to stuck is known to the rod stopper.
[0003]
[Problems to be solved by the invention]
However, even if the soft elastic member is attached to the rod or the rod stopper, there is a problem of reliability that the soft elastic member is easily peeled off.
[0004]
The present invention has been made in view of the above-described problems of the prior art. The object of the present invention is to reduce the number of parts while improving the reliability of the buffer, to facilitate the assembly and to reduce the cost. An object of the present invention is to provide a solenoid actuator that can be downed.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the solenoid actuator of the present invention is fixed to a solenoid support having a rod stopper, and is provided with a solenoid and an internal solenoid so as to perform a suction operation by solenoid excitation and a return operation by solenoid demagnetization. In a solenoid actuator comprising a provided plunger, a rod extended to the plunger, and a compression coil spring that is mounted between the solenoid and the rod and constantly urges and urges both of them In order to buffer the collision noise between the rod and the rod stopper that sometimes occurs, a slit is provided in an end surface portion of the rod that is in contact with the rod stopper so as to be substantially parallel to the contact surface.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the invention will be described with reference to the drawings.
FIG. 1 is a plan view of a solenoid actuator 50 of the present invention. FIG. 2 is a front sectional view of FIG.
A solenoid support 10 formed of a resin molded member (for example, ABS resin) is provided with a rod stopper 11 and a solenoid fixing claw 12.
[0007]
The solenoid 20 as an embodiment is formed by winding a copper wire 22 around a cylindrical bobbin 21 and connecting it to a terminal piece 23 to connect an electrical insulating material 27 (for example, an adhesive sealing material such as polyester resin, epoxy resin, silicone resin, urethane resin). Etc., including other materials for water-proofing, moisture-proofing, anti-condensation, etc.) and surrounding a yoke 25 having a fixed iron core 24.
[0008]
The rod 40 as one embodiment is formed of a resin molding member (for example, ABS resin), and is connected to an end surface portion having a U-shaped groove 41 by inserting a plunger 30, and the end surface portion having a slit 42 is solenoid-supported. It contacts the rod stopper 11 of the body 10.
In the present embodiment, the slit 42 is provided with a slit on the end surface portion of the rod 40 that is in contact with the rod stopper 11 substantially parallel to the contact surface. For example, even if it is an S-shaped (zigzag) slit, It may be a slit with a slight angle in the vertical direction of the contact surface. Further, the present invention is not limited to the above, and it is needless to say that many combinations, modifications and the like can be made without departing from the spirit of the invention.
The rod 40 has various shapes depending on the device that makes full use of the solenoid actuator, and since the object to be operated by the device is different, details of functions and roles are omitted, but in this embodiment, The micro switch 60 is turned ON / OFF. Further, each time the suction operation is performed, the lock mechanism component 70 is locked or released.
[0009]
A plunger 30 of a magnetic member provided in the solenoid 20 is connected to a rod 40 extended to the plunger 30, and a compression coil spring 31 is mounted around the plunger 30 and inserted into the solenoid 20.
In this state, the solenoid 20 is fitted to the solenoid fixing claw 12 of the solenoid support 10, and the end surface portion having the slit 42 of the rod 40 is brought into contact with the rod stopper 11. As a result, the compression coil spring 31 constantly urges the solenoid 20 and the rod 40. The solenoid 20 screw-fastens a screw hole 26 provided in the yoke 25 and the solenoid support 10. The support method of the rod 40 is omitted.
[0010]
In the solenoid actuator of the present invention, the collision noise between the rod 40 and the rod stopper 11 during the return operation has been successfully reduced by 10 dB or more.
Further, in order to buffer the impact sound between the fixed iron core 24 and the plunger 30 during the suction operation, the plunger 30 is provided with a concave groove 32 and an E-ring 33 with a rubber plate 34 attached thereto is mounted so as to be almost silent. However, this is a known technique and other methods may be used.
In addition, since the plunger 30 is only inserted and connected to the U-shaped groove 41, there is a slight gap between the two, and when an impact sound generated therefrom is anxious, for example, foamed urethane, sponge, etc. Alternatively, a damper material such as a rubber plate may be inserted.
[0011]
【The invention's effect】
In the solenoid actuator of the present invention, the number of parts is improved while eliminating the soft elastic member and providing a slit substantially parallel to the contact surface on the end surface portion of the rod that contacts the rod stopper while improving the reliability of the buffer. There is an effect that the cost can be reduced by reducing assembly, and making assembly easier.
[Brief description of the drawings]
FIG. 1 is a plan view of a solenoid actuator of the present invention.
FIG. 2 is a front sectional view of the solenoid actuator of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Solenoid support body, 11 ... Rod stopper, 12 ... Solenoid fixing claw, 20 ... Solenoid, 21 ... Bobbin, 22 ... Copper wire, 23 ... Terminal piece, 24 ... Fixed iron core, 25 ... Yoke, 26 ... Screw hole, 27 DESCRIPTION OF SYMBOLS Electrical insulating material 30 ... Plunger 31 ... Compression coil spring 32 ... Groove, 33 ... E ring, 34 ... Rubber plate, 40 ... Rod, 41 ... U-shaped groove, 42 ... Slit, 50 ... Solenoid actuator, 60 ... Micro switch, 70 ... Lock mechanism parts

Claims (1)

A solenoid that is fixed to a solenoid support body having a rod stopper and is attracted by solenoid excitation and reset by solenoid demagnetization, a plunger provided in the solenoid, and a rod extending to the plunger In a solenoid actuator comprising a compression coil spring that is mounted between the solenoid and the rod and that constantly urges and urges both, the impact noise between the rod and the rod stopper that occurs during the return operation is buffered. For this purpose, a solenoid actuator characterized in that a slit is provided in an end surface portion of the rod that is in contact with the rod stopper substantially parallel to the contact surface.

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