JPH0452966Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to a rotary solenoid used as a power source that generates a powerful rotary stroke over a wide angle using electromagnetic force, and is particularly suitable for use under dusty environmental conditions. Regarding rotary solenoid with dustproof cover.

[Prior Art] This type of rotary solenoid converts linear motion into rotary motion as shown in FIG. 5b and shaft 5c, a return spring 10 for restoring the rotating part 5 to its initial position, and a dustproof cover 1 that fits into the case and prevents dust from entering the rotating part. has been done.

However, in the conventional rotary solenoid of this type, the case 4 and the armature 5a have ball races 7a and 7b on which balls 6 run on concentric circles (not shown), and when the coil 8 of the solenoid is excited, the rotating part 5 is directly and strongly It is attracted to the base 9 side. Since the rotating part 5 is supported by the balls 6, as the balls 6 roll from the shallow part to the deep part (not shown) of the ball races 7a and 7b, the rotating part 5 descends while rotating. , stopping at the deepest part of the ball race (not shown). When the excitation is removed, the rotating part 5 is restored by the return spring 10, and the ball 6 is also returned to its original position.

[Problems to be solved by the invention] In the above conventional example, the ball races 7a, 7b
When the rotation is stopped at the deepest part of the shaft, and when the rotating section 5 is de-energized and restored by the return spring 10 and returns to its initial position, the impact from the case 4, the armature 5a, and the ball 6 engages the case 4. There was a problem in that the dustproof cover that was installed resonated, causing vibration and noise. In particular, when a large number of rotary solenoids (100 to 200) are used in a dusty work environment, such as in automatic postal code reading and sorting machines, and the rotary solenoids operate frequently, The vibration and noise are high, making it difficult to apply rotary solenoids especially in places where low noise is required.

[Means for Solving the Problems] The present invention was developed in view of the above-mentioned problems, and its gist is that it consists of a fixed part consisting of a case, base, and coil, and a rotating part consisting of an armature, hub, and shaft. , a rotary solenoid with a dustproof cover comprising a return spring for restoring the rotating part to the initial position, and a dustproof cover that fits into the case and prevents dust from entering the rotating part, the structure of the dustproof cover; This is a multi-layered structure in which a damping material is placed on the inside of a conventional dustproof cover, and an inner cover is further provided inside the damping material.

[Embodiment] The present invention will be described below with reference to an illustrated embodiment.

FIG. 1 is a partially cutaway view showing a dustproof cover according to the present invention, in which a damping material 2 is provided inside the cover 1,
An inner cover 3 is further provided inside the vibration damping material 2,
It has a three-layer structure with damping material 2 sandwiched between them. The inner cover 3 prevents the damping material from being damaged when the dustproof cover is fitted (press-fitted) into the case.

By using the dustproof cover according to the present invention in place of the conventional dustproof cover shown in FIG.
Case 4, armature 5a, and ball 6 when rotation is stopped at the deepest part of ball races 7a and 7b shown in the figure, and when excitation is removed and rotating part 5 is restored by return spring 10 and returned to the initial position.
The vibration damping material 2 absorbs the impact caused by this, and the vibration and noise of the dustproof cover are reduced.

[Effects of the invention] As explained above, by configuring the cover in multiple layers, the above-mentioned impact is absorbed by the damping material, and there is an effect that the vibration and noise of the dustproof cover can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway view of the dustproof cover of the present invention, and FIG. 2 is a perspective view of a conventional rotary solenoid with a dustproof cover. 1... Dustproof cover, 2... Damping material, 3... Inner cover, 4... Case, 5... Rotating part, 5a...
Armature, 5b...Hub, 5c...Shaft, 6...Ball, 7a, 7b...Ball race, 8...Coil, 9...Base, 10...Return spring.

Claims (1)

[Scope of utility model registration request] a fixed part having a case, a base, and a coil; a rotating part having an armature, a hub, and a shaft; a return spring for restoring the rotating part to its initial position; In a rotary solenoid equipped with a dustproof cover structure for preventing dust from entering, the dustproof cover structure has a multilayer structure in which a damping material is placed on the inside of the dustproof cover, and an inner cover is provided inside the vibration damping material. A rotary solenoid that is characterized by: