JP3755306B2 - solenoid - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a solenoid that attracts an operating plate having a hinge structure against an elastic body by energizing a coil.
[0002]
[Prior art]
Conventionally, there are the following solenoids that are optimally used in a winning device for a pachinko game machine. That is, this solenoid is called a hinge-type solenoid, and an operation plate made of a magnetic metal (for example, an iron plate) having a hinge structure is provided at one end of the coil so as to cover the end of the coil. Further, a leaf spring that urges the actuation plate in a direction away from the coil is interposed between the actuation plate and the coil. By energizing the coil, the operating plate is attracted to the coil against the urging force of the leaf spring, while by stopping energization, the operating plate is separated from the coil by the urging force of the leaf spring.
[0003]
[Problems to be solved by the invention]
However, such a conventional solenoid has a problem that a large restoring force (a force for separating from the coil) cannot be applied to the operating plate because the elastic force of the leaf spring cannot be increased. This will be described below.
[0004]
In a winning device for a pachinko game machine in which this type of solenoid is incorporated, it is necessary to return the driven body (pachinko winning mechanism) driven by the solenoid while the pachinko ball is in contact, It is inevitable that the sliding load of the driven body increases due to aging. Therefore, a solenoid having a relatively large return force is desired.
[0005]
In response to such a demand, it is conceivable to increase the elastic force and increase the restoring force by increasing the thickness of the leaf spring or increasing the width of the leaf spring. However, when the thickness of the leaf spring is increased, there is a disadvantage that the durability of the leaf spring is deteriorated. Further, when the width of the leaf spring is increased, the leaf spring becomes larger, which causes a disadvantage that it is difficult to incorporate the solenoid into the winning device. Therefore, these measures could not be adopted.
[0006]
Furthermore, when the return force is increased, the suction force must be increased accordingly, and there is a disadvantage that the coil is enlarged accordingly. That is, as shown in FIG. 6, the suction force of the solenoid is actuated with respect to increases quadratic curve (geometric series) manner as the operation plate approaches the coil, the elastic force of the leaf spring to the coil Regardless of the position of the plate , it increases only in a linear line (equal series). Therefore, if the elastic force of the leaf spring is increased in order to increase the return force at the point c in the figure (the swing position where the operation plate is closest to the coil), which is the most important force for returning the operation plate , Similarly, the return force at point a (the swinging position where the operating plate is farthest from the coil) also increases. Therefore, as shown by two-dot chain line, when you try to return force at point c large enough, though the return force at a point to suck the suction force (actuating plate at a point most It will exceed the important power). At point a, if the return force exceeds the suction force, the operating plate cannot be sucked. Therefore, the coil must be enlarged to increase the suction force. This increases the cost of the solenoid and increases the size of the winning device. Inconvenience that it becomes difficult to incorporate into.
[0007]
Accordingly, an object of the present invention is to increase the restoring force without causing deterioration of characteristics, an increase in size, or an increase in cost.
[0008]
[Means for Solving the Problems]
The present invention achieves the solution of the above-described problem by the following means.
[0009]
In the first aspect of the present invention, an operating plate is provided at one end of the coil so as to cover the end of the coil and swing freely, and the operating plate is urged in a direction away from the coil between the operating plate and the coil. A solenoid that interposes an elastic body and causes the coil to be attracted to the coil against energizing force of the elastic body by energizing the coil, the elastic body comprising a single spring plate, , A mounting piece fixed to the rocking base end side of the operating plate, a main spring piece, and a sub spring piece. The main spring piece and the sub spring piece are connected to the operating plate from the mounting piece. The mounting angle with respect to the mounting piece is set to a predetermined angle and is extended to the swinging tip side. The mounting angle of the main spring piece is the operating plate in almost the entire swing range of the operating plate. The tip of the main spring piece is The auxiliary spring piece is set at an angle that makes contact with the restriction part on the side of the coil, and the auxiliary spring piece is in a limited swing range from the closest position of the secondary spring piece to the coil of the operating plate to the midway swing position. It is characterized in that the tip of the secondary spring piece is set to an angle that makes contact with the coil only within the limited swing range so as to apply a biasing force to the operating plate. It has the following effects. That is, at the swing position where the operating plate is farthest from the coil, only the urging force of the main elastic body acts on the operating plate, so the urging force at this position is relatively small. On the other hand, in the vicinity of the swing position where the operating plate is closest to the coil, the urging force of the main elastic body and the urging force of the secondary elastic body act on the operating plate together. Is increased by adding the urging forces of both elastic bodies.
[0010]
According to a second aspect of the present invention, in the solenoid according to the first aspect, a claw portion that engages a driven body driven by the operating plate is provided at the swinging tip of the operating plate. This has the following effects. That is, since the operating plate can be firmly engaged with the driven body by the claw portion, the driving force of the operating plate is reliably transmitted to the driven body. Or a solenoid according to 2, wherein an engagement hole provided on the swing base end side of the operating plate is loosely engaged with an engagement protrusion provided on a yoke surrounding the coil, and It has a feature in that a locking body that covers the tip of the mating protrusion is mounted, and has the following action. That is, when the engagement hole is loosely engaged with the engagement protrusion and the locking body is attached to the yoke, the operation plate is swingably attached to the solenoid, so that the operation plate can be easily attached.
[0011]
The invention described in claim 4 is the solenoid according to claim 3, wherein the locking body is provided with a restriction piece extending from the front end side of the engagement protrusion toward the swing front end side of the operating body. At the same time, the control piece is characterized in that an inclined surface that restricts the swing angle of the operating body is formed on the side surface of the operating body of the restricting piece, thereby having the following action. In other words, since the swinging position of the operating plate is regulated in a stable state by being attached to the inclined surface, the engaging body is attached to the yoke by loosely engaging the engaging hole with the engaging protrusion. In spite of this, the oscillation of the operating plate is stabilized.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0013]
FIG. 1 is a perspective view of a hinge type solenoid according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof. This solenoid has a coil 1. The coil 1 has an iron core 2 penetrating therethrough and is housed in a yoke 3 made of a magnetic metal (for example, iron). The yoke 3 has a rectangular parallelepiped shape having a volume capable of storing the coil 1, and one surface thereof is open. The coil 1 is housed in the yoke 3 from the one end face 1a side, and an iron piece 4 corresponding to an operating plate is provided on the other end face 1b of the coil 1 located on the open face side of the yoke 3. The iron piece 4 is made of a magnetic metal plate (for example, an iron plate) and is disposed so as to cover the other end surface 1 b of the coil 1.
[0014]
An engagement hole 4 a is formed in the iron piece 4. The engagement hole 4 a is formed so as to penetrate along the one side edge of the iron piece 4 in the thickness direction. On the other hand, an engagement protrusion 3 a is formed on the yoke 3. The engagement protrusion 3a is disposed at a position facing the engagement hole 4a, and is formed to project from the edge of one side surface of the yoke 3 toward the iron piece 4 side. The cross-sectional shape of the engagement protrusion 3a is slightly smaller than the size of the engagement hole 4a.
[0015]
A cover 5 corresponding to a locking body is fitted on the side surface of the yoke 3 where the engagement protrusion 3 a is formed, and is fixed to the yoke 3 with screws 6. A restriction piece 5 a is provided on the iron piece side edge of the cover 5. The restricting piece 5 a extends from the iron piece side edge of the cover 5 toward the coil 1 side substantially in parallel with the other end face 1 b of the coil 1. The formation position of the restriction piece 5a is set as follows. That is, when the cover 5 is attached to the yoke 3, the formation position of the restriction piece 5 is set at a position where the tip of the engagement protrusion 3a of the yoke 3 is covered by the side surface of the restriction piece 5a.
[0016]
Then, with the engagement protrusion 3a loosely engaged with the engagement hole 4a (larger than the engagement protrusion 3a), the cover 5 is mounted on the yoke 3, and the tip of the engagement protrusion 3a is covered with the restriction piece 5a. Thus, the iron core 2 is swingably attached to the yoke 3. This operation is relatively simple because only the cover 5 is attached. In addition, since the movement of the rocking | fluctuation base end of the iron piece 5 is accept | permitted by the rocking | fluctuation allowance hole 5b provided in the cover 5, the rocking | fluctuation of the iron piece 4 becomes comparatively free. Further, an inclined surface 5c for restricting the swing angle of the iron piece 4 is formed at the tip of the iron piece side surface of the restricting piece 5a. The iron piece 4 is attached to the inclined surface 5c and its angular position is stabilized. Regulated by state. Therefore, the rocking of the iron piece 4 is stable although the attachment of the iron piece 4 is somewhat uncertain by loosely engaging the engagement hole 4a with the engagement protrusion 3a.
[0017]
Further, a claw portion 4 b is provided at the swinging tip of the iron piece 4. The claw portion 4 b is formed by cutting the central portion in the width direction of the rocking tip of the iron piece 4 into a bowl shape and then bending it approximately 90 ° toward the outside of the coil 1. Since the iron piece 4 has such a claw portion 4b, the iron piece 4 can be firmly engaged with a driven body (driven rod A or driven plate B) driven by the iron piece 4. The driving force can be reliably transmitted to the driven body.
[0018]
As described above, the iron piece 4 is swingably attached to the yoke 3. The iron piece 4 has the following characteristics. That is, the leaf spring 6 that is an elastic body is attached to the surface of the iron piece 4 on the coil 1 side. The leaf spring 6 is fixed to the rocking base end side of the iron piece 4 (in this embodiment, caulking fixed), and a main spring piece (mainly extending from the mounting piece 6a to the rocking tip side of the iron piece 6 6b, 6b (corresponding to an elastic body) and a secondary spring piece (corresponding to a secondary elastic body) 6c. The main spring pieces 6b are provided at both ends of the iron piece 4 in the width direction, and the tips of the main spring pieces 6b extend to a position facing the inner surface of the yoke 3 (the inner surface located on the upper side in the figure). The auxiliary spring piece 6 c is provided at the center in the width direction of the iron piece 4, and its tip extends to a position facing the other end face 1 b of the coil 1.
[0019]
The attachment angles of the main spring piece 6b and the auxiliary spring piece 6c with respect to the mounting piece 6a are set as follows. That is, along the angle (relatively high angle) in which the tip of the main spring piece 6b is in contact with the inner surface of the yoke 3 and elastically biases the iron piece 4 toward the outside of the coil 1 with respect to the yoke 3 in the coil non-energized state. The main spring piece 6b extends from the mounting piece 6a. Therefore, when the coil is not energized, the iron piece 4 is urged by the main spring piece 6b abutting against the yoke 3, and swings around the engaging portion between the engaging hole 4a and the engaging protrusion 3a. Therefore, the iron piece 4 is in contact with the inclined surface 5 c formed on the regulating piece 5 a and is separated from the other end surface 1 b of the coil 1.
[0020]
On the other hand, the auxiliary spring piece 6c extends from the mounting piece 6a along an angle lower than the attachment angle of the main spring piece 6b. Therefore, in the coil non-energized state where the iron piece 4 is in contact with the inclined surface 5c by the urging of the main spring piece 6b, the auxiliary spring piece 6c is separated from the other end face 1b of the coil 1, and the iron piece 4 is energized by the coil 1 energization. When the oscillates to a midway position, the secondary spring piece 6c comes into contact with the other end face 1b of the coil 1 and gives its elastic force to the iron piece 4.
[0021]
Next, the operation of this solenoid will be described with reference to FIGS. FIG. 4 is a partially cutaway side view of the iron piece 4 in each operation state, and FIG. 5 shows the relationship between the attraction force of the coil 1 and the return force by the leaf spring 6 at each swing position (stroke) of the iron piece 4. FIG.
[0022]
First, as shown in FIG. 4A, in the non-coiled state of coil (point a in FIG. 5), the main spring piece 6b abuts against the inner surface of the yoke 3 and urges the iron piece 4 with its elastic force. However, the auxiliary spring piece 6 c does not contact the coil 1 and does not bias the iron piece 4. That is, in the coil non-energized state, the restoring force is constituted only by the elastic force of the main spring piece 6b, so that the restoring force is relatively small. In this state, the restoring force is a resistance force against the suction of the coil 1, so that the coil 1 can suck the iron piece 4 with a relatively small suction force, and even the small coil 1 with a relatively small suction force is an iron piece. 4 can be reliably sucked.
[0023]
Next, as shown in FIG. 4B, when energization of the coil 1 is started and the coil 1 starts to attract the iron piece 4, the iron piece 4 swings toward the coil 1. Then, the tip of the auxiliary spring piece 6 c gradually approaches the coil 1. When the auxiliary spring piece 6c comes into contact with the coil 1 during the swinging of the iron piece 4 (point b in FIG. 5), the auxiliary spring piece 6c also urges the iron piece 4. Therefore, the iron piece 4 is urged by both the main spring piece 6b and the auxiliary spring piece 6c, and its restoring force increases. However, at this time, the suction force by the coil 1 increases geometrically as the iron piece 4 approaches, so that even if the restoring force (resistance force against suction) by the leaf spring 6 increases, the coil 1 has the iron piece 4. Make sure to aspirate.
[0024]
Then, as shown in FIG. 4C, energization of the coil 1 is continued, and the iron piece 4 swings until the iron piece 4 substantially contacts the coil 1 with the auxiliary spring piece 6c interposed therebetween (in FIG. 5). c point) and the restoring force is maximized. Therefore, when energization of the coil 1 is stopped at this position, the iron piece 4 returns to the state shown in FIG. 4A with a large return force.
[0025]
As described above, the iron piece 4 oscillates and repeats the adsorption separation with respect to the coil 1. However, during the oscillation, the iron piece 4 always has its engaging hole 4a peripherally in contact with the engaging protrusion 3a of the yoke. The magnetic flux generated in the coil 1 is hardly leaked to the outside. Thereby, the coil 1 can exhibit a suction effect efficiently.
[0026]
In the embodiment described above, the leaf spring 6 includes the single auxiliary spring piece 6c, but may include a plurality of auxiliary spring pieces. In this case, if the attachment angles of the auxiliary spring pieces are made different from each other and the positions where the auxiliary spring pieces abut against the coil 1 are set in stages, the leaf springs are not energized and the iron piece 4 is being oscillated. The return force at the point c (return point) in FIG. 5 can be further increased without causing the inconvenience that the return force 6 exceeds the suction force of the coil 1 and cannot be sucked.
[0027]
By the way, in this type of solenoid, when the iron piece 4 is attracted to the coil 1, it is important to maintain a constant gap formed between the iron piece 4 and the coil 1. This is because the restoring force becomes unstable unless the gap is stabilized. On the other hand, in the above-described embodiment, the iron piece 4 is attracted to the coil 1 with the auxiliary spring piece 6c interposed therebetween, and the gap formed between the iron piece 4 and the coil 1 at the time of adsorption is It depends on the thickness of the auxiliary spring piece 6c. The accuracy of the thickness of the auxiliary spring piece 6c is high, and the thickness hardly changes over time. Therefore, in the solenoid according to the above-described embodiment, the accuracy of the gap is increased and the restoring force is stable.
[0028]
Furthermore, in the above-described embodiment, the connector 1 is provided on the coil 1, and the lead wire connected to the connector 1 can be attached via the connector 7 so as to be connectable / separable. . As a result, when the solenoid is shipped, the lead wire can be separated from the solenoid and packaged, and handling of the lead wire, which has conventionally been wound around the solenoid due to its relatively long length, is simplified.
[0030]
【The invention's effect】
As described above, according to the present invention, the urging force at the swing position where the operating plate is farthest from the coil is relatively small, and the force is applied near the swing position where the operating plate is closest to the coil. I was able to increase the power. Thereby, the effect that the return force can be increased without increasing the size of the elastic body itself and the size of the coil was obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an external shape of a solenoid according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the solenoid according to the embodiment.
FIG. 3 is a back view and a partially cutaway side view of the solenoid according to the embodiment.
FIG. 4 is a partially cutaway side view showing the operation of the solenoid according to the embodiment.
FIG. 5 is a diagram illustrating characteristics of the solenoid according to the embodiment.
FIG. 6 is a diagram showing characteristics of a conventional solenoid.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Coil 1a Magnetic force line direction one end surface 1b Magnetic force line direction other end surface 2 Iron core 3 Yoke 3a Engagement protrusion 4 Iron piece 4a Engagement hole 4b Claw part 5 Cover 5a Restriction piece 5b Oscillation allowance hole 5c Inclined surface 6 Plate spring 6a Mounting piece 6b Main spring piece 6c Sub spring piece

Claims (4)

An operating plate is provided at one end of the coil so as to cover the end of the coil and swingable, and an elastic body that urges the operating plate in a direction away from the coil is interposed between the operating plate and the coil. A solenoid that causes the coil to be attracted to the coil against the urging force of the elastic body by energizing to the coil,
The elastic body consists of a single spring plate,
The spring plate includes a mounting piece fixed to the rocking base end side of the operating plate, a main spring piece, and a sub spring piece.
The main spring piece and the sub spring piece extend from the mounting piece to the swinging tip side of the operating plate, and the mounting angle with respect to the mounting piece is set to a predetermined angle.
The mounting angle of the main spring piece is such that the front end of the main spring piece abuts against the coil-side regulating portion so that the main spring piece applies a biasing force to the operating plate in almost the entire swing range of the operating plate. Set to an angle,
The auxiliary spring piece has the tip of the auxiliary spring piece applied to the coil so that the auxiliary spring piece applies an urging force to the operating plate in a limited swing range from the closest position to the coil of the operating plate to the middle position of the swing. It is set to an angle that makes contact only with its limited swing range,
A solenoid characterized by that. The solenoid according to claim 1,
A solenoid having a claw portion that engages with a driven body driven by the operating plate, is provided at a rocking tip of the operating plate. The solenoid according to claim 1 or 2,
The engagement hole provided on the swing base end side of the operating plate is loosely engaged with the engagement protrusion provided on the yoke surrounding the coil, and the engaging body that covers the tip of the engagement protrusion is formed on the yoke. A solenoid characterized by being mounted. The solenoid according to claim 3, wherein
The locking body is provided with a restricting piece extending toward the swinging tip side of the operating body, and an inclined surface for restricting the swinging angle of the operating body is formed on the operating body side surface of the restricting piece. Solenoid to do.

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