JPH0513522B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is a rotary solenoid that reciprocates through a certain angle, that is, when a pulse is input, the rotor rotates through a certain angle to adjust the deviation angle of the rotor. This invention relates to an improvement in a rotary solenoid that performs a so-called reciprocating rotation movement in which when the rotor is restrained and the pulse is cut off, the restraint is released and the rotor returns to its original position by applying a light restoring force.

[Prior art]

Today, rotary solenoids are widely used as drive sources for operating drive mechanisms such as print head needles in printing devices such as printers, plungers in mini pumps, and batting rods that hit pachinko balls in pachinko game machines. Generally, a circular structure shown in FIG. 6 is adopted. That is, in FIG. 6, reference numeral 1 denotes a stator yoke formed in a circular shape, and a pair of magnetic poles 2a, 2b are integrally formed in the center of the inner peripheral surface of the stator yoke, facing each other. The coils 3a and 3b are respectively wound a certain number of times and connected in series, and the space between the magnetic poles 2a and 2b is provided with a rotor 4 having two salient poles corresponding to the magnetic poles 2a and 2b. is inserted, and the rotor 4 is constructed by rotatably supporting a rotation shaft 5 on a bearing (not shown). The operation is performed by the coils 3a, 3
When a control pulse is applied to b, magnetic flux flows through the stator yoke 1 via the rotor 4, and the arm 6 attached to the rotor 4 is stopped by the repulsion and attraction of the magnetic flux flowing between the stator yoke 1 and the rotor 4. 7 to the stopper 8 side, and while the pulse is input to the coils 3a and 3b, the arm 6 is restrained to the stopper 8 side, and when the pulse is cut off, the magnetic flux disappears, so the arm 6 By applying its own weight or a light restoring force (for example, using a spring member) (not shown), it returns to the stopper 7 side and returns the rotor 4 to its original position. Note that the rotary solenoid A shown in Fig. 6 has a two-pole structure with two magnetic poles 2a and 2b, so although the rotation range of the rotor is approximately 90°, there is a difference between 0° and 90° points. Since the generated torque is "0", when using
Generally, the rotation range of the rotor 4 is restricted to about 70 degrees by stoppers 7 and 8.

However, the rotary solenoid A having a circular structure has the following drawbacks.

(1) In a rotary solenoid with a circular structure,
In order to increase the generated torque, it was necessary to increase the diameter of the rotor 4 and the ampere turns of the coils 3a and 3b. However, increasing the diameter of the rotor 4 increases the distance between the magnetic poles 2a and 2b, and increasing the number of ampere turns requires winding the coil conductor wire around the magnetic poles 2a and 2b many times, or winding the coil conductor wire with a large wire diameter. Therefore, in order to satisfy each of the above conditions, the circular stator yoke 1 had to have a large diameter, and was manufactured with a lot of unnecessary space left. Rotary solenoid A
This inevitably increases the size of the rotary solenoid A, and this not only makes it difficult to install it in a narrow space inside equipment that uses rotary solenoid A, such as printers and mini pumps, but also causes the problem that the equipment used becomes larger when used. It was hot.

(2) In addition, when winding the coils 3a, 3b around the magnetic poles 2a, 2b, since the stator yoke 1 is formed in a circular shape and the vertical direction of the magnetic poles 2a, 2b is closed, for example, simply winding the coil bobbin Therefore, the wire feeding arm of a winding machine (not shown) that extracts the coil wire is passed through the stator yoke 1, and the coil is wound while making a complicated rotational movement. 3a,
3b, the winding operation cannot be performed quickly, and a complicated and expensive winding machine is used, which requires a considerable investment in equipment when manufacturing the circular rotary solenoid.

(3) Furthermore, since the coils 3a and 3b must be wound separately on the magnetic poles 2a and 2b, and both coils 3a and 3b must be connected manually after winding, the coils 3a and 3b must be wound separately. As mentioned in the previous section 2, the winding work is very laborious and time consuming, as well as the time it takes to wind the coil, and is a major factor hindering the mass production of circular rotary solenoids. Ta.

As described above, the rotary solenoid A shown in FIG. 6, which has a circular structure, becomes larger as the generated torque increases, and since the circular stator yoke 1 is used in manufacturing, the coil Various problems have arisen in its use and manufacture, including the inability to quickly perform winding operations, resulting in increased manufacturing costs.

[Purpose of the invention]

This invention eliminates the above-mentioned drawbacks, has a simple structure, is easy to manufacture, and even if the generated torque is increased, the rotary solenoid itself does not become particularly large, and it can be easily installed in narrow spaces of equipment. It provides a rotary solenoid that can be installed.

[Summary of the invention]

In the present invention, the stator yoke is formed into a substantially U-shape,
A coil is attached to the bridging part (connection) side of the upper part of the stator yoke, and the rotor is rotatably supported between the magnetic poles located inside the open part (opposite the bridging part) of the lower part of the stator yoke. The rotary solenoid is configured by the rotary solenoid.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3.

In FIG. 1, reference numeral 11 denotes a stator yoke, which is made by punching electromagnetic steel plates such as silicon steel plates into a substantially U-shape, stacking them in the required number of sheets and fixing them with caulking pins 12. a bridge part 11a for coil attachment, a parallel magnetic path piece 11c,
Magnetic poles 11b and 11b' each having an arcuate shape with a protruding ridge at the tip are provided on the inner surface of the lower end of 11c'. 13 is a coil attached to the bridge portion 11a of the stator yoke 11;
3, as shown in FIG.
Each divided portion is fitted onto the bridging portion 11a from both sides of the laminated end face of the stator yoke 11 by fitting and joining, etc., and the joint portion 1 of the coil bobbin 14 is
4a is attached to the stator yoke 11 by bonding and fixing it using an adhesive tape or an adhesive. When winding the coil conductor of the coil bobbin 14, for example, the stator yoke 11 is attached to the rotating shaft of a winding machine (not shown), and the coil bobbin 14 is wound.
The coil conductor wire is wound around the coil bobbin 14 by rotating it together with the stator yoke 11.
At this time, the magnetic path pieces 11c, 11 of the stator yoke 11
Since the lower part c' is open, winding of the coil conductor can be performed quickly and easily without being obstructed by the stator yoke 1. 15 is a rotor insertion hole 1 opened between the magnetic poles 11b and 11b' at the bottom of the stator yoke 11.
6, the salient poles 15a, 15a' in the parts corresponding to the magnetic poles 11b, 11b' of the stator yoke 11 are formed in an arc shape, and the remaining parts are formed in a flat shape. has been done. 17
1 is a bracket in which a bearing fitting part 17a for housing a bearing 18 for receiving a rotating shaft 15c of a rotor 15 is bored in the center part, and mounting arms 17b are integrally extended on both sides, and the rotor 15 is attached to the stator yoke 11. When mounting the rotor 15 on the rotating shaft 15c of the rotor 15, the bearing 18 is inserted into the rotor insertion hole 16 of the yoke 11 that fixes the rotor 15, and then the rotor 1
By fitting the brackets 17 from both sides of the stator yoke 5 and storing the bearing 18 in the bearing fitting part 17a, the bracket 17 is brought into contact with the end surface of the stator yoke 11, and in this state, the tightening screw 19 is removed from one of the brackets. When the brackets 17 are fixed to the stator yoke 11 by passing through the stator yoke 11 and screwing them onto the other bracket, the rotor 15 is fixed to the stator yoke 11.
can be attached to the electrical center position of the rotor insertion hole 16.

The rotary solenoid B of the present invention is constructed as described above, and its usage will now be explained with reference to FIG.

FIG. 5 shows an example in which the rotary solenoid B is implemented in, for example, a ball firing device of a pachinko game machine. The rotor 15 is fixed to the mounting board 20 by screwing into a support nut 22 fastened to the stator yoke 11, and the rotating shaft 15c of the rotor 15 passing through the mounting board 20 is attached to the base end of the operating rod 23. Then, as shown in FIG. 5, stoppers 24 and 25 for regulating the rotation range of the operation rod 23 are attached to the mounting board 20 in the middle of the rotation locus of the operation rod 23, that is, within the rotation range of the operation rod 23. be installed on each.

Next, when operating the operating rod 23, turn on the switch using an operating knob (not shown), send a control pulse to the rotary solenoid B from a pulse generator (not shown) attached to the mounting board 20,
When the rotor 15 is rotated by energizing the coil 13 of the rotary solenoid B, the operating rod 23 rotates to the position shown by the two-dot chain line in FIG. Fire the ball by striking it. Note that when the operating rod 23 stops sending pulses to the rotary solenoid B after colliding with the stopper 25, the excitation of the coil 13 is released and the restraining force of the rotor 15 of the rotary solenoid B is released, so that the operating rod 23 cannot be operated. The rod 23 returns to the position where it collides with the stopper 24 due to its own weight (returns to the starting point). Therefore, by controlling the pulse intermittent time, the number of firings of the operating rod 23 can be adjusted as desired. In addition, if the stopper 24 is constructed to be able to change its mounting position arbitrarily, the rotation angle of the rotor 15 of the rotary solenoid B can be adjusted, so that the ball hitting force of the operating rod 23 can be changed.

Figure 4 shows the rotary solenoid B of the present invention.
This shows an embodiment in which a pulse generator for operating this is attached, and its structure is as follows:
A mounting leg cylinder 28 is integrally formed at the bottom of the box 27 that houses the bracket 1.
7 and the support nut 22 are attached to the back surface of the rotary solenoid B by means of tightening screws 19 and 29 which are tightened to the stator yoke 11, thereby making it possible to save the mounting space for the pulse generator 26.

Furthermore, although the present invention has been described with reference to an example in which the rotor 15 is formed using a magnetic material, instead of this, by using a rotor that uses permanent magnets, the rotation angle of the rotor can be increased (approximately 180 degrees). ), or even if the pulse is cut off, the rotor itself will
Since the rotary solenoid can self-reset by the attraction force of the stator yoke and the permanent magnet without applying restoring force from its own weight or from the outside, there is an advantage that the range of use of the rotary solenoid can be expanded.

Furthermore, instead of using a silicon steel plate, the stator yoke 11 may be made of a magnetic material forged into a substantially U-shape.

Although the rotary solenoid B of the present invention has been described as an example implemented in a pachinko game machine that hits and shoots pachinko balls, the present invention is not limited to this, and the operation rod 23 directly connected to the rotation axis of the rotary solenoid B can be For example, it can be connected to the print head needle of a printer to print characters, connected to the plunger of a mini pump for water supply and drainage work, or used as a drive device for the handle of a robot that grips objects. Of course, it is possible.

[Effects of the Invention] According to the present invention, a coil is attached to the bridge portion of the upper part of the stator yoke formed in a substantially U-shape, and a coil is attached to the inside of the lower end of the parallel magnetic path piece integrally hanging from the stator yoke. In this method, arc-shaped magnetic poles with a protruding ridge at the tip are formed facing each other, and between these magnetic poles, the salient poles in the parts corresponding to the magnetic poles are formed in an arc-shape, and the other parts are flat-shaped. Since the rotor is rotatably inserted, unlike conventional
In order to increase the generated torque, there is no need to increase the ampere turns of the coil or to increase the diameter and axial dimensions of the rotor. Since the rotary solenoid is constructed by setting the magnetic poles and the salient edges of the rotor formed in correspondence with each other so that the magnetic flux flows well,
This makes it possible to flow the generated magnetic flux in such a way as to effectively generate torque in the rotational direction of the rotor, and to reduce the torque generated in the rotor by specifically increasing the current flowing through the coil, or by increasing the current flowing through the solenoid. It becomes possible to increase the size without increasing the size itself. Furthermore, when the rotary solenoid of the present invention generates the same torque as a conventional solenoid, the solenoid itself can be significantly downsized compared to the case where a circular stator yoke is used, and the ball hitting device of an electric pachinko It can be easily installed even in narrow installation places such as.

In addition, when winding the coil, the stator yoke is formed into a U-shape, unlike the conventional circular stator yoke in which the top and bottom of the magnetic pole around which the coil is wound are closed. Therefore, the space at the open end at the bottom of the magnetic path piece can be effectively used to smoothly, quickly, and easily wind the coil conductor of the coil bobbin attached to the bridge part of the fixed yoke. Rotary solenoids can be mass-produced without investing in equipment such as expensive winding machines, and can be manufactured at low cost.

Furthermore, when winding the coil, since the stator yoke of the present invention is formed in a substantially U-shape, the stator yoke is mounted with the two-split coil bobbin clamped to the bridging portion of the upper part of the stator yoke. By attaching it to a winding machine and rotating it, compared to the conventional method of dividing it into two parts and winding it,
Since the coil conductor can be concentratedly wound around one coil bobbin through the space between the magnetic poles, the winding work can be performed smoothly and quickly.
Moreover, as mentioned above, there is no need to use a special structure for the winding machine itself; a general winding machine can be used to automatically wind the coil, and the coil can be simply wound onto the coil bobbin. This eliminates the need for the conventional work of dividing and winding coils and connecting them each time, making it possible to manufacture rotary solenoids easily and economically with a simple structure, making it easier to mass-produce. A suitable rotary solenoid can be provided.

Moreover, the rotary solenoid of the present invention
Since the coil is not wound around the magnetic pole, and the fixed yoke is formed in a U-shape, the structure does not become too large, and unlike conventional circular rotary solenoids, there is almost no unnecessary space. Since there is no rotary solenoid, it is possible to make the rotary solenoid smaller and more compact, and the rotary solenoid can be easily installed in a narrow space of the equipment in which it is used. Moreover, the operating rod that is directly connected to the rotor can be used even if the rotary solenoid is made smaller.
Since the rotation range and rotation force can be easily changed and set using a stopper, the driving force of the equipment using the rotary solenoid will not be affected.

As explained above, in the present invention, power saving can be achieved even if the generated torque is increased, and
We can provide a rotary solenoid that is small and suitable for mass production, and does not increase in size even if the generated torque is increased to a certain extent, making it possible to fit equipment that uses rotary solenoids as a drive source into narrow spaces. It has many excellent effects such as ease of installation.

[Brief explanation of the drawing]

Figure 1 is a front view of the rotary solenoid of the present invention, Figure 2 is a side view, Figure 3 is a vertical side view, and Figure 4 is a side view.
The figure is a partially longitudinal side view showing another embodiment of the present invention.
FIG. 5 is an explanatory diagram showing one usage state of the rotary solenoid of the present invention, and FIG. 6 is an explanatory diagram for explaining a conventional rotary solenoid. 11... Stator yoke, 11a... Bridge portion, 1
1b, 11b'...Magnetic pole, 15...Rotor, 15c
...Rotation axis, 17...Bracket.

Claims (1)

[Claims] 1 A coil bobbin divided into two is sandwiched between the bridging portion of the upper part of the stator yoke formed in a substantially U-shape, and a coil is wound thereon, and the lower part of the magnetic path piece on both sides of the stator yoke with the coil on the upper part is formed. Arc-shaped magnetic poles with protruding ridges at the tips are formed facing each other on the inner side of the end, and between the magnetic poles, salient poles corresponding to these magnetic poles are formed in an arc-shape to form other magnetic poles. A rotor having a flat portion is arranged, the rotary shaft of the rotor is rotatably supported by a bracket having a built-in bearing and attached to the stator yoke, and the rotor is attached to the stator yoke. , on the rotation axis of the rotor,
A rotor solenoid characterized by being equipped with an operating punch that reciprocates at a fixed angle with a rotor.