JP3493548B2 - Solenoid structure of solenoid - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field related to a sound deadening structure that damps an operating sound caused by advancing / retreating a plunger of a solenoid.

[0002]

2. Description of the Related Art Conventionally, as a sound deadening structure for a solenoid, for example, a cushioning structure that is fitted to a plunger that moves forward and backward in the coil and abuts a yoke surrounding the coil to secure a clearance between the plunger and the plunger receiver is known. There is known one provided with a spacer formed of a material (rubber or the like).

According to this conventional solenoid sound deadening structure, since the spacer secures a clearance between the plunger and the plunger receiver, a direct collision between the plunger and the plunger receiver is avoided. Generation of collision noise is prevented. Further, since the spacer made of a cushioning material cushions the impact of the collision with the yoke, the collision noise of the spacer (the spacer supporting member) and the yoke is attenuated.

[0004]

In the conventional silencer structure for a solenoid described above, the collision noise of the spacer and the yoke is not sufficiently attenuated due to the limit of the material of the spacer, so that the operating noise of the plunger cannot be effectively silenced. There is a point.

When a high voltage is applied to the solenoid and the plunger is strongly attracted, the operating noise of the plunger tends to increase. However, due to the fact that the material of the spacer that effectively exhibits the cushioning function for both high pressure and low pressure has not been obtained, when a vehicle battery with large voltage fluctuation is used as the power source of the solenoid, ,
There is a problem that the operating noise of the plunger cannot be effectively silenced.

The present invention has been made in consideration of the above problems, and provides a silencer structure for a solenoid that can effectively mute the operating noise of the plunger even when the voltage applied to the solenoid fluctuates. The task is to do.

[0007]

Means for Solving the Problems In order to solve the above-mentioned problems, a silencer structure for a solenoid according to the present invention employs the following means.

That is, according to the first aspect of the present invention, the spacer is made of a cushioning material that is fitted to the plunger that moves forward and backward in the coil and contacts the yoke surrounding the coil to secure a clearance between the plunger and the plunger receiver. In the sound deadening structure of the solenoid equipped with, the small protrusions are formed radially on the contact surface of the spacer with the yoke, and the spacer
A small protrusion is also formed on the surface opposite to the contact surface with the
Align the small protrusions on both sides of the
The seat plate that comes into contact with the entire surface on the opposite side of the contact surface
It is characterized in that it is fixed to the locker .

According to this means, the small protrusions of the spacer exert a buffering function by varying the degree of deformation with respect to both high pressure and low pressure to deform the pressure. In addition, the portion other than the small protrusion of the spacer secures the clearance between the plunger and the plunger receiver together with the small protrusion deformed by pressure. Well
Also, make a small bump on the surface of the spacer opposite to the surface that contacts the yoke.
Form the ridges and align the small protrusions on both sides of the spacer.
The spacer on the entire surface of the surface opposite to the contact surface with the yoke.
By fixing the abutting seat plate to the plunger,
The seat plate lined by the spacer equalizes the pressure applied to the spacer.
And the cushioning function is demonstrated on both sides of the spacer.
It

According to a second aspect of the present invention, in the sound deadening structure for a solenoid according to the first aspect, at least two types of small protrusions having different projecting heights are formed.

By this means, a stepwise buffer structure is constructed.

According to a third aspect of the present invention, in the sound deadening structure for a solenoid according to the second aspect, the small protrusions have a mountain-shaped cross section that decreases toward the tip of the protrusion, and the high and small protrusions with high protrusion height have the angle of the mountain shape. The small small projections having a small projection height and a small projection height are characterized in that the angle of the mountain shape is large.

According to this means, the high and small protrusions are likely to be deformed by pressure, and the low and small protrusions are less likely to be deformed by pressure.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a silencer structure for a solenoid according to the present invention will be described below with reference to the drawings.

[0015] Figures 1-3, ginseng muffling structure of solenoid
It shows a consideration example (1).

In this reference example , similarly to the above-mentioned conventional example, a clearance is provided between the plunger 2 and the plunger receiver 4 by fitting the plunger 2 which moves forward and backward in the coil 1 and abutting on the yoke 3 surrounding the coil 1. The spacer 5 is formed of a buffer material for ensuring the above.

The plunger 2 slides forwards and backwards inside a sliding cylinder 7 fitted to a bobbin 6 around which the coil 1 is wound, and is fixed in the sliding cylinder 7 to form a truncated cone-shaped plunger receiver 4 The limit of suction slide is regulated. This plunger 2 is provided with a conical fitting groove 2a that fits into the plunger receiver 4 at one end,
At the other end, a step portion 2b is provided as a support member of the plunger 2 to which a seat plate 8 having a size and shape that abuts the entire surface of the plunger 2 is fitted and fixed. A shaft 9 is coaxially inserted and fixed to the other end of the plunger 2.

The spacer 5 is formed in the shape of a ring plate, is fitted into the plunger 2, and abuts on the seat plate 8 fixed to the step portion 2b of the plunger 2. The yoke 3 is composed of a body portion 3a surrounding the coil 1, the bobbin 6 and the like in a U shape, and a plate-shaped lid portion 3b assembled to the body portion 3a on the opposite side of the plunger receiver 4. Therefore, the spacer 5 is the plunger 2
And collides with the lid portion 3b of the yoke 3.

As shown in detail in FIG. 2, the spacer 5 has a lid portion 3b of the yoke 3 of the ring plate-shaped main body portion 5a.
The small projections 5b are radially formed on the contact surface with. The main body portion 5a and the small protrusions 5b are integrally formed of fluororubber or the like. The small projections 5b have a mountain-shaped cross section that decreases toward the protruding tip, and 12 pieces are arranged on the inside at an angle a of 30 degrees and 18 pieces are arranged on the outside at an angle b of 20 degrees.
It has a column structure. Regarding the size of the small projections 5b, when the thickness c of the main body portion 5a is 0.6 mm, the angle d of the chevron is set to 80 to 100 degrees, and the diameter e of the skirt of the chevron is about 1.4 mm. It is preferable to design so that the thickness f including the thickness c of the body portion 5a is about 1.35 mm.

According to this reference example , when the plunger 2 is attracted and retracts due to the application of the voltage to the solenoid, and the spacer 5 collides with the lid portion 3b of the yoke 3, the small projection 5b of the spacer 5 causes the yoke 3 to move. It will collide with the lid portion 3b and undergo pressure deformation (see enlarged display in FIG. 1). Therefore, the small protrusions 5b of the spacer 5 exert a cushioning function, and the collision sound between the spacer 5 (the seat plate 8 which is a supporting member of the spacer 5) and the lid portion 3b of the yoke 3 is surely silenced. In particular, even if the voltage applied to the solenoid fluctuates and the suction / retraction force of the plunger 2 changes, the pressure deformation of the small protrusions 5b of the spacer 5 naturally changes in accordance with the pressure force of the collision. . Therefore, the operating noise of the plunger 2 can be effectively silenced even if the voltage applied to the solenoid fluctuates.

Since the seat plate 8 lines the entire surface of the main body portion 5a of the spacer 5, the collision pressure applied to the spacer 5 is equalized. Therefore, the spacer 5
The small projections 5b evenly and reliably exhibit the cushioning function, and the plunger 2 is assured of precise operation without giving unnecessary stress to the operation direction of the plunger 2.

Further, the pressure deformation of the small protrusions 5b of the spacer 5 prevents pressure transmission and avoids unnecessary pressure deformation of the main body 5a. Therefore, the clearance between the plunger 2 and the plunger receiver 4 is surely secured, and the collision noise of the plunger 2 and the plunger receiver 4 is surely prevented.

[0023] FIG. 4, 5, participation of muffling structure of the solenoid
It shows a consideration example (2).

In this reference example , as shown in FIG. 4, the small protrusions 5b of the spacer 5 are inwardly spaced at an angle of 30 degrees from each other.
16 pieces are arranged outside at an angle of 22.5 degrees to form a two-row configuration. In the inner row, two small protrusions 5b ″ having a small protruding height are arranged between the small protrusions 5b ′ having a large protruding height (indicated by a grid line).
In the outer row, the high and small protrusions 5b 'and the low and small protrusions 5b "are arranged alternately. Therefore, the protrusions 1b are arranged at an angle of 45 degrees.
One or two high and small protrusions 5b 'are radially arranged.

Further, in this reference example , as shown in FIG. 5, the angle d of the ridges of the high and small protrusions 5b 'is set to 80 degrees, and the angle d of the ridges of the low and small protrusions 5b "is set to 100 degrees.

According to this reference example , basically the above-mentioned reference
The same action and effect as those of the example (1) are exhibited. However, the small protrusions 5b of the spacer 5 are high and small protrusions 5b 'and low and small protrusions 5b ".
Since it has the two-stage structure, the buffer function of the spacer 5 is improved as compared with the reference example (1) described above.

Further, since the high and small protrusions 5b ′ are relatively easily deformed by pressure and the low and small protrusions 5b ″ are not easily deformed by pressure, depending on the pressure of the collision of the spacer 5 with the lid portion 3b of the yoke 3, it may be main. In addition, the high and small protrusions 5b 'exert a buffering function, and the low and small protrusions 5b "exert a function of complementing the main body portion 5a which secures the clearance between the plunger 2 and the plunger receiver 4.

FIG. 6 shows an embodiment ( 1 ) of the silence structure of the solenoid according to the present invention.

In this embodiment, the small projections 5b are formed on both surfaces of the spacer 5. For the small protrusion 5b, any of the above-mentioned reference examples (1) and (2) can be adopted. However, in order to equalize the collision pressure applied to the spacer 5, the arrangement of the small protrusions 5b on both surfaces is made to match.

According to this embodiment, basically the above-mentioned
The same actions and effects as the reference examples (1) and (2) are exhibited. However, since the buffer function is exhibited on both sides of the spacer 5, the buffer function of the spacer 5 is improved as compared with the reference examples (1) and (2) described above.

As described above, in addition to the illustrated embodiment, it is possible to form three or more kinds of small protrusions 5b of the spacer 5 or to arrange three or more rows or change the shape and size.

Further, as the material of the spacer 5, it is possible to select a material other than fluororubber.

[0033]

EXAMPLES foregoing Reference Example (1), (2), the embodiment
Regarding (1) , the generated sound was measured. The measurement method is
It was based on the noise measurement of JIS C1505. The conventional example is A, the reference example (1) is B, the small protrusion 5b of the reference example (1) is formed on both sides (that is, the embodiment (1)) is C, and the reference example is C.
The small protrusion 5b of Consideration (2) is formed on both sides (that is,
The embodiment (corresponding to ( 1 )) is D. The measurement results are as follows. A 58 dB B 49 dB C 41 dB D 36 dB According to these measurement results, it is understood that the present invention is effective in silencing the operating noise associated with the reciprocation of the solenoid plunger.

[0034]

As described above, in the sound deadening structure of the solenoid according to the present invention, the small protrusions of the spacer change the degree of deformation with respect to both high pressure and low pressure, and deform the pressure to provide a cushioning function. Since it is exhibited, there is an effect that the operating noise of the plunger can be effectively silenced even if the voltage applied to the solenoid fluctuates. Further, since the cushioning function is exhibited on both sides of the spacer, there is an effect that the operating noise of the plunger can be more effectively silenced. Furthermore, since the seat plate lined by the spacer equalizes the pressure applied to the spacer, the cushioning function of the small protrusions of the spacer is evenly and surely exhibited, and the plunger does not exert unnecessary stress in the operating direction of the plunger. There is an effect that the precise movement of is guaranteed.

Further, according to the second aspect, since the stepwise buffer structure is configured, there is an effect that the operating noise of the plunger can be more effectively silenced.

Further, according to claim 3, since the high and small projections are relatively easily deformed by pressure and the low and small projections are less likely to be deformed by pressure, the high and small projections are mainly buffered depending on the pressure of collision of the spacer with the yoke. There is an effect that the function can be exerted, and the function of ensuring the clearance between the plunger and the plunger receiver can be exerted on the small protrusion.

[Brief description of drawings]

1 is a cross-sectional view of a disassembled state showing a reference example of a muffling structure of a solenoid (1).

2 is an assembly state diagram of FIG. 1. FIG.

FIG. 3 is an enlarged sectional view taken along line XX of FIG.

4 is a sectional view of a main part showing a reference example of muffling structure of solenoid (2).

5 is an enlarged cross-sectional view taken along line YY of FIG.

FIG. 6 is a cross-sectional view of essential parts showing an embodiment ( 1 ) of a silencer structure for a solenoid according to the present invention.

[Explanation of symbols]

1 coil 2 Plunger 3 York 4 Plunger receiving 5 spacers 5a main body 5b small protrusion 5b 'High and small protrusions 5b "Low small protrusion

Claims (3)

(57) [Claims] 1. A solenoid having a spacer formed of a cushioning material that is fitted to a plunger that moves forward and backward in the coil and abuts a yoke that surrounds the coil to secure a clearance between the plunger and the plunger receiver. In the sound deadening structure, small protrusions are radially formed on the contact surface of the spacer with respect to the yoke, and
Small protrusions are also formed on the opposite side, and small protrusions on both sides of the spacer
Match the placement of the spacers and oppose the contact surface of the spacer to the yoke.
A silencer structure for a solenoid characterized in that a seat plate that abuts the entire side surface is fixed to the plunger . 2. The silencer structure for a solenoid according to claim 1, wherein at least two kinds of small protrusions having different projecting heights are formed. 3. The muffler structure of a solenoid according to claim 2, wherein the small protrusion has a mountain-shaped cross section that decreases toward the protruding tip, and the high-small protrusion having a high protruding height is formed with a small angle of the mountain. The low-height low-small protrusions have a large angle of a chevron, which makes the solenoid muffler structure.