JP3159318B2 - Electromagnetic operation mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The electromagnetic operation mechanism of the present invention will be described in detail according to the following items.

A. Industrial applications B. Summary of the invention C. Prior art D. Problems to be solved by the invention E. Means to solve the problems F. Embodiment a. Outline of cam gear type control device [Fig. B. Cam gear, drive gear [FIG. 1, FIG. 2, FIG. 4, FIG. 5] c. Electromagnetic operation mechanism [FIGS. 1 to 3, 5] c-1. Trigger lever, pull Spring c-2. Electromagnetic plunger c-3. Operation [Fig. 1] G. Effects of the invention (A. Industrial application field) The present invention relates to a novel electromagnetic operation mechanism. More specifically, an electromagnetic operation mechanism including an electromagnetic plunger and a moving member whose position is controlled by the electromagnetic plunger, and more specifically, a self-holding type having a magnet and a movable iron core that is slidable in a direction in which the magnet moves toward and away from the magnet. The electromagnetic plunger is connected to the movable core, and the position when the movable core is attracted to the magnet (yoke) (hereinafter, referred to as “adsorption position”) is different from the position (hereinafter, referred to as “non-adsorption position”). The moving member is moved from the non-sucking position to the attracting position, and the movable core is attracted to the magnet to hold the moving member at the attracting position. The present invention relates to an electromagnetic operation mechanism in which when a power is supplied to a plunger, the magnetic force generated in the electromagnetic plunger releases the movable core from being attracted by the magnet. By devising a connection structure between the movable core and the moving member, the movable core is attracted to the magnet in a state where the position of the movable core is not restrained by the moving member. A special electromagnetic operation mechanism which can eliminate the need for a special limiter means for securely making contact with the yoke), thereby simplifying the structure and expanding the degree of freedom of design. It is.

(B. Summary of the Invention) An electromagnetic operation mechanism according to the present invention includes an electromagnetic plunger having a magnet, a movable iron core slidably provided in a direction in which the magnet is separated from and coming into contact with the magnet, and a yoke provided with the magnet. A moving member that is moved between a position when the iron core is adsorbed to the yoke and a position when the movable iron core is separated from the yoke, and slides the movable iron core in a direction to be separated from and brought into contact with the magnet; An electromagnetic plunger and driving means for moving the moving member when the initial driving force is supplied by the moving member, wherein the driving means includes a cam gear for supplying the initial driving force and moving the moving member, and is attached to the moving member. A biasing member for providing a biasing force; a connecting protrusion is formed on one of the movable core and the moving member; A connecting hole whose width in the sliding direction is slightly larger than the size of the connecting protrusion connects the movable core and the moving member, and the connecting hole is provided to face the first side surface and the first side surface. A movable core is slid by the moving member and comes close to the yoke, the movable core is attracted to the yoke so that the connection protrusion contacts the first side of the connection hole. Since the movable core is pressed by the moving member and comes into proximity with the magnet, the movable core is attracted to the magnet without being restrained by the moving member. ) Does not require an overstroke of the moving member to reliably contact the moving member. Therefore, there is no need to provide a special limiter means for absorbing the overstroke of the moving member. More, it is possible to set the positional relationship between the means and the means for moving the moving member to the suction position and the moving member freely.

(C. Prior Art) A moving member, for example, one of the mechanisms for controlling the position of a moving member that is moved between one position and another position, includes a magnet and a magnet. There is an electromagnetic operation mechanism provided with a self-holding type electromagnetic plunger having a movable iron core slidable in a direction of coming and going.

This type of electromagnetic operation mechanism generally connects a movable iron core and a moving member, and the movable iron core is pressed by the moving member and is attracted to the magnet, so that the electromagnetic plunger is applied to the moving member. Even if the moving force is released, it is held at the adsorption position where it is attracted to the electromagnetic plunger, and from that state, the magnetic plunger is energized to generate a magnetic force that cancels the attractive force of the magnet, thereby releasing the adsorption of the movable core to the magnet And the movable member can be moved to another position, and the connection between the movable iron core and the movable member is formed by fitting a connection protrusion formed on one of them into a connection hole formed on the other. It is often done by inserting.

By the way, in such an electromagnetic operation mechanism, it is necessary that the movable iron core be completely contacted with the magnet in order to stably hold the moving member at the suction position. That is, if the movable iron core is not attracted to the magnet and is merely attracted to the magnet, the moving member may come off the attracted position.

Since the movable core is connected to the moving member and its position is always restricted by the position of the moving member, in order for the movable core to be completely in contact with the magnet, the timing at which the moving member reaches the adsorption position is determined. It is necessary to make sure that the movable iron core is brought into contact with the magnet so that the movable iron core contacts the magnet.

However, the dimensional accuracy of each part such as the moving member, the electromagnetic plunger, and the means for moving the moving member toward the electromagnetic plunger, and the dimensional accuracy of the mounting positions of these members inevitably cause some errors. Since there is some variation in the movement stroke, the movable iron core may not come into contact with the magnet even when the movement member reaches the suction position.

For this reason, in this type of conventional electromagnetic operation mechanism,
Usually, an elastic portion having a so-called limiter function is provided on the moving member so that the moving amount applied to the moving member when the moving member is moved to the suction position has a slight overstroke. For example, an elastic arm having bending elasticity in a direction along the moving direction of the movable core is formed on the moving member,
The pressing by the pressing means for pressing the moving member toward the suction position is performed via the elastic arm, and the pressing stroke is set to be slightly larger than the stroke required for the moving member to reach the suction position. An overstroke is generated, and the moving member is pressed against the electromagnetic plunger by the pressing of the overstroke, whereby the movable iron core is surely brought into contact with the magnet.

(D. Problems to be Solved by the Invention) As described above, in the conventional electromagnetic operation mechanism, the moving member is provided with the limiter means, and the pressing by the pressing means for moving the moving member to the suction position is performed by the elasticity. And the pressing is given an over-stroke, so that there is a problem that the configuration of the moving member becomes complicated and the shape becomes large. Since the shape and the position of the elastic part are restricted to each other, there is a problem that the design of the shape of each part and the layout of the member arrangement become very difficult.

(E. Means for Solving the Problems) In order to solve the above-mentioned problems, the electromagnetic operation mechanism of the present invention includes a magnet and a movable iron core slidably provided in a direction in which the magnet moves toward and away from the magnet. An electromagnetic plunger having a yoke provided with a movable core is moved between a position when the movable core is attracted to the yoke and a position when the movable core is separated from the yoke, and moves the movable core with respect to the magnet. A moving member that slides in a direction in which the moving member is slid away, and a driving unit that is supplied with an initial driving force by an electromagnetic plunger and the moving member and moves the moving member.
The driving means includes a cam gear that is supplied with an initial driving force and moves the moving member, and includes a biasing member that applies a biasing force to the moving member, and forms a connection protrusion on one of the movable iron core and the moving member. On the other hand, the connecting protrusion is inserted into the other, and a width of the movable core in the sliding direction with respect to the magnet in the sliding direction is formed slightly larger than the size of the connecting protrusion to connect the movable iron and the moving member. The hole includes a first side surface and a second side surface provided opposite to the first side surface,
When the movable iron core is slid by the moving member and comes close to the yoke, the movable iron core is attracted to the yoke so that the connecting projection comes into contact with the first side surface of the connecting hole.

Therefore, in the electromagnetic operation mechanism of the present invention, the overstroke of the moving member for securely bringing the movable iron core into contact with the magnet (yoke) becomes unnecessary, and therefore, a special limiter for absorbing the overstroke of the moving member is not required. There is no need to provide any means, and this makes it possible to freely set the means for moving the moving member to the suction position and the positional relationship between the means and the moving member.

(F. Embodiment) Hereinafter, details of the electromagnetic operation mechanism of the present invention will be described with reference to the illustrated embodiment.

In the illustrated embodiment, the electromagnetic operation mechanism of the present invention is applied to an electromagnetic operation mechanism for preventing rotation of a cam gear and canceling the rotation of the cam gear in a cam gear type control device.

(A. Outline of Cam Gear Type Control Device) [FIG. 2] Reference numeral 1 denotes a cam gear type control device, which is mounted on a mechanical chassis 2 (see FIG. 5) in a left-right direction (upper left in FIG. 2). The direction toward the left is defined as the left side, the direction toward the lower right is defined as the right side, the direction toward the lower left is defined as the front side, and the direction toward the upper right is defined as the rear side. When the slider 3 is slidably provided, for example,
A mode switching slider 3 of the tape player, a cam gear 4 which is rotated to move the slider 3 to prevent rotation at three predetermined stop positions, and a drive gear 5 for rotating the cam gear 4. An electromagnetic operating mechanism 6 for preventing rotation of the cam gear 4 and releasing the inhibition, and the electromagnetic operating mechanism 6 includes a rotatable trigger lever 7
When the trigger lever 7 comes to a blocking position for preventing rotation with respect to the cam gear 4, the trigger lever 7 is sucked and held at that position, and when the cam gear 4 is rotated, the self-holding type which releases suction with respect to the trigger lever 7 is released. It comprises an electromagnetic plunger 8 and a tension spring 9 for urging the trigger lever 7 toward a non-blocking position where rotation of the trigger lever 7 with respect to the cam gear 4 is released.

(B. Cam gear, drive gear) [FIG. 1, FIG. 2, FIG.
FIG. 5] The cam gear 4 has a disk-shaped main part 10, and has three toothless parts 11, 11, 11 arranged on the outer peripheral surface of the main part 10 at intervals in the circumferential direction. A tooth portion 12 is formed, a control cam groove 13 is formed on the upper surface of the main portion 10, a controlled cam groove 14 is formed on a lower surface of the main portion 10, and the center of the main portion 10 is a mechanical chassis. 3 rotatably supported.

A pressed pin 15 protruding from the lower surface of the right end of the slider 3 is slidably engaged with the control cam groove 13. When the cam gear 4 is rotated, the control cam groove 13 The side surface presses the pressed pin 15 in the left-right direction, whereby the slider 3 is moved between three control positions having different control contents, and the cam gear 4 is prevented from rotating at the three stop positions. Thereby, the slider 3 is held at the control position.

The controlled cam groove 14 of the cam gear 4 is formed near the outer peripheral surface of the main portion 10 so as to extend endlessly in the circumferential direction around the center of the cam gear 4.
a, that is, on the peripheral surface 14a remote from the center of the cam gear 4, three stopper projections 16, 16, 16 projecting toward the center and having a narrow trapezoidal shape are formed. The reference numerals 16 and 16 are respectively provided at three positions of the one peripheral surface 14a which are located substantially directly behind the center of the cam gear 4 when the cam gear 4 comes to the three stop positions.

In the other peripheral surface 14b of the controlled cam groove 14, at a position facing each of the stopper protrusions 16, 16, 16 separately,
A pressed surface 17 and a push-back surface 18 are formed, each of which is open toward the stopper projection 16 so as to form a substantially rectangular shape. When viewed from above, the pressed-back surface 18 is a continuous pressed surface.
17 is located on the clockwise side, and its tip 18a is
The other main part 1 extends in a direction substantially parallel to 4a and 14b.
It is bent with respect to 8b and is located at a substantially intermediate portion between the peripheral surfaces 14a and 14b.

The drive gear 5 is rotatably supported by the mechanical chassis 2,
The pitch circle is positioned so as to circumscribe the pitch circle of the tooth portion 12 of the cam gear 4 substantially from the front left, and is rotated by a drive system (not shown). When the cam gear 4 is rotated, it is rotated clockwise as viewed from above. You. Therefore, the cam gear 4 is always rotated counterclockwise.

When the cam gear 4 is at the stop position, the three toothless portions 11, 11, 11 that correspond to the stop position of the cam gear 4 correspond to the drive gear 5, and accordingly,
In this state, even if the drive gear 5 rotates, the cam gear 4 is not rotated, and the initial rotation of the cam gear 4 from this state (this initial rotation is performed by the electromagnetic operation mechanism 6 and the pressed surfaces 17, 17, 17) Are performed in cooperation with each other.), The three partial tooth portions 12a, 12a, 12a of the tooth portion 12 which have been close to the drive gear 5 from the clockwise direction side of the cam gear 4 up to that point. The driving gear 5 is engaged with the cam gear 4, whereby the cam gear 4 is rotated by the driving gear 5.

(C. Electromagnetic Operation Mechanism) [FIGS. 1 to 3 and 5] (c-1. Trigger Lever, Extension Spring) The main part 19 of the trigger lever 7 is substantially j-shaped when viewed from above. A substantially triangular arm 20 protrudes substantially rightward from a middle portion of a side edge of the main portion 19 facing right front, and a middle portion in a longitudinal direction of the main portion 19. A boss 21 is provided at a position slightly forward from the boss, and an engagement protrusion 22 is provided at an end of the arm 20 so as to protrude upward. A spring pin is located at a high place, and a connection pin 23 having a substantially cylindrical shape is provided on the upper surface of the main part 19 at a position near the upper spring hook 19a.
Is erected.

Numeral 24 denotes a support shaft vertically suspended from the rear of the mechanical chassis 2 at a position slightly behind the cam gear 4. The support shaft 23 is inserted through an insertion hole 21 a formed through the boss 21. Thereby, the trigger lever 7 is rotatably supported by the support shaft 24.

The upper portion of the engagement projection 22 of the trigger lever 7 is located in the controlled cam groove 14 substantially right behind the center of the cam gear 4.

The horizontal cross section of the engaging projection 22 is substantially semicircular, and its arc surface faces the other peripheral surface 14b of the controlled cam groove 14.

One end of the tension spring 9 is engaged with a spring engaging projection 25 vertically provided on the lower surface of the mechanical chassis 2, and the other end is engaged with a spring engaging portion 19 a of the trigger lever 7. A turning force in a clockwise direction as viewed from above is biased on the trigger lever 7 by the pulling force of the pulling spring 9.

Therefore, while the trigger lever 7 is not pressed in the counterclockwise direction, the position where the engagement protrusion 22 abuts on the other peripheral surface 14b of the controlled cam groove 14 (hereinafter, referred to as “non-blocking position”)
That. ), And when the trigger lever 7 is at the non-blocking position, the engagement protrusion 22 is
Are located off the rotation locus of the stopper projections 16, 16, 16.

(C-2. Electromagnetic Plunger) Reference numeral 26 denotes a base member of the electromagnetic plunger 8, which is parallel to each other from a substantially U-shaped fixing portion 27, which is horizontally long when viewed from above, and a wall-shaped side of the fixing portion 27. 2 which has a substantially rectangular cylindrical shape
The two coil bobbins 28 are integrally formed of a synthetic resin.

Numeral 29 denotes a substantially U-shaped yoke. Two yoke portions 29a, 29a (hereinafter, referred to as "adsorbing portions") extending in parallel with each other are formed near holes 28 of the coil bobbins 28, 28.
a and 28a are inserted into substantially half portions of the fixing portion 27 side, and the remaining portion 29b is held by the fixing portion 27.
A magnet 30 is arranged at a portion between the two adsorbing portions 29a and 29a protruding from the coil bobbins 28, 28, and is bonded to the yoke 29.

31 and 31 are coils wound around the coil bobbins 28 and 28, respectively.

Reference numeral 32 denotes a movable iron core, which is substantially U-shaped when viewed from above, and has two portions 33, 33 (hereinafter, referred to as "extending") extending in parallel with each other.
This is referred to as “adsorbed part”. ) Are slidably inserted into the coil bobbins 28, 28, and the base 32a connecting the base ends of the two attracted parts 33, 33 is long in the direction orthogonal to the moving direction of the movable core 32. An elongated hole-shaped connection hole 35 is formed.

The connection hole 35 in the moving direction of the movable core 32 is
, That is, 2 which are opposed to each other in parallel in the moving direction.
The distance between the side surfaces 35a and 35b is slightly larger than the thickness of the intermediate portion of the connecting pin 23 of the trigger lever 7.

Such an electromagnetic plunger 8 is fixed to a position on the lower surface of the mechanical chassis 2 that is slightly behind the cam gear 4 from the left side, and the moving direction of the movable iron core 32 is substantially the same as the rotation trajectory of the connecting pin 23 of the trigger lever 7. The yoke 29 is fixed to the mechanical chassis 2
29b is fixed to a mounting seat 36 (see FIG. 5) attached to the mechanical chassis 2 by a fixing means such as a screw.

Then, the connection pin of the trigger lever 7 is inserted into the connection hole 35.
23 is inserted with some margin, whereby the trigger lever 7 and the movable iron core 32 of the electromagnetic plunger 8 are connected.

In a state where the movable iron core 32 is attracted to the yoke 29, the connecting pin 23 is connected to the two side surfaces 35a, 3a of the connecting hole 35.
By contacting one side 35a of 5b which is farther from the yoke 29, further movement in the clockwise direction is prevented, so that the trigger lever 7 moves its position against the tensile force of the tension spring 9. In this state, the trigger lever 7 is
As shown by the solid line in FIG. 3A, the engaging projection 22 is held at the blocking position located on the rotation locus of the stopper projections 16, 16, 16 of the cam gear 4, and from this state, the coil of the electromagnetic plunger 8 is moved. When the electricity is supplied to 31 and 31, the attracting force by the yoke 29 is canceled by the magnetic force generated thereby, the attracting by the yoke 29 to the movable iron core 32 is released, and the trigger lever 7 is pulled by the tensile force of the tension spring 9. It is moved to the non-blocking position.

(C-3. Operation) [FIG. 1] The operation by the electromagnetic operation mechanism 6 is performed as follows.

The energization of the electromagnetic plunger 8 is performed temporarily when the cam gear 4 is rotated.

As described above, when the trigger lever 7 is at the blocking position, the engaging projection 22 is engaged with the stopper projection of the cam gear 4.
16, 16 and 16 are located on the rotation locus,
Is located almost directly behind the center of the cam gear 4,
When the trigger lever 7 moves to the blocking position after the rotation of the cam gear 4 starts, the one of the stopper projections 16, 16, 16 which is closest to the engagement projection 22 at that time from the clockwise direction is the position of the cam gear 4. The stopper projection 16 comes into contact with the engagement projection 22 at a position almost directly behind the center, thereby preventing the rotation of the cam gear 4.

When the cam gear 4 reaches the stop position or a position slightly before the stop position, the toothless portion 11 corresponding to the stop position among the three toothless portions 11, 11, 11 faces the drive gear 5.

The rotation of the cam gear 4 at the stop position is prevented as described above.

When the electromagnetic plunger 8 is energized from the state where the cam gear 4 is at the stop position, the magnetic force generated thereby cancels the attraction force of the yoke 29, and the attraction of the movable core 32 by the yoke 29 is released. Since the position of the lever 2 is released, the trigger lever 7 is rotated clockwise by the tensile force of the tension spring 9 as shown by a two-dot chain line in FIG. The one side 35a of the hole 35 is moved by following the trigger lever 7 by being pulled by the connecting pin 23. As a result, the engagement projection 22 deviates from the rotation trajectory of the stopper projections 16, 16, 16, so that the rotation inhibition performed on the cam gear 4 is released, and the engagement projection moved substantially forward at this time. 22 presses the pressed surface 17 corresponding to the stopper projection 22 to slightly rotate the cam gear 4 counterclockwise. This rotation is the initial rotation, and this initial rotation is shown in FIG.
As shown in FIG. 7, the operation is performed until the engagement protrusion 22 contacts the place where the pressed surface 17 and the push-back surface 18 are continuous. Then, when the cam gear 4 is initially rotated, the partial tooth portion 12a whose end on the counterclockwise direction is close to the drive gear 5 is meshed with the drive gear 5, so that the drive gear 5 will be To rotate.

When the cam gear 4 is rotated in this manner, the main portion 18b of the push-back surface 18 which is continuous with the pressed surface 17 pressed at the time of the initial rotation becomes the engagement protrusion 22 as shown in FIG. Is pressed toward the left rearward, whereby the trigger lever 7 is rotated toward the blocking position, and at this time, the movable iron core 32 is pressed by the connecting pin 23 on the other side surface 35 b of the connecting hole 35. This brings him closer to York 29.

When the trigger lever 7 reaches a position slightly before the blocking position as shown in FIG. 1 (D), the distal end surfaces 33a, 33a of the attracted portion 33 of the movable iron core 32 (hereinafter referred to as "adsorbed surface"). ) Is brought close to the tip end surface of the suction portion 29a of the yoke 29, so that the suction force of the yoke 29 from around this position causes the movable iron core 32 to move.
At this time, since the connecting pin 23 is in contact with the other side surface 35b of the connecting hole 35, the movable iron core 32 is connected to the connecting hole 35.
1D, the movable core 32 can move toward the yoke 29 by the difference between the dimension of the movable core in the moving direction and the thickness of the connecting pin 23 (hereinafter referred to as "play"). As shown by the dashed line, it is moved toward the yoke 29 and is attracted to the yoke 29.

Thus, the movable core 32 is moved toward the yoke 29 by a suction force of the yoke 29 instead of being pressed by the trigger lever 7 from a certain point when the movable iron core 32 is pressed by the trigger lever 7 and approaches the yoke 29.

If the space between the movable core 32 and the yoke 29 when the movable core 32 is moved by the suction force of the yoke 29 is less than the play between the connection hole 35 and the connection pin 23, the movable The iron core 32 comes into contact with the yoke 29 and is attracted thereto.
If the interval is equal to or larger than the play, the movable iron core 32 is moved toward the yoke 29 until one side surface 35a of the connection hole 35 abuts on the connection pin 23, and further moves the trigger lever 7 to the blocking position. When it is turned to the point where it approaches, it comes into contact with the yoke 29 and is sucked.

The pressing of the trigger lever 7 toward the electromagnetic plunger 8 by the pushing back surface 18 pressing the engagement protrusion 22 causes the engagement protrusion 22 to push the trigger lever 7 as shown by a solid line in FIG. The process ends when the vehicle rides on the front end portion 18a of the return surface 18. In this state, the trigger lever 7 has passed the blocking position and has come to a position slightly closer to the electromagnetic plunger 8 side.
The connection pin 23 is separated from both the one side surface 35a and the other side surface 35b of the connection hole 35. That is, since the position of the movable iron core 32 is fixed when it comes into contact with the yoke 29, only the trigger lever 7 is moved toward the electromagnetic plunger 8 from that point forward.

Then, when the cam gear 4 is further rotated from the above state and the push-back surface 18 and the distal end portion 18a are disengaged from the engaging projections 22, the trigger lever 7 connects the connecting pins 23 in the clockwise direction by the tensile force of the tension spring 9. The hole 35 is rotated until it comes into contact with one side surface 35a, and is held there.

Thus, the movable iron core 32 is securely attracted to the yoke 29,
Thus, the trigger lever 7 is stably held at the blocking position.

When the cam gear 4 is further rotated from the above state and reaches the next stop position, the next stopper projection 16 comes into contact with the engagement projection 22 of the trigger lever 7, whereby the cam gear 4
Is stopped at the stop position.

(G. Effects of the Invention) As is clear from the above description, the electromagnetic operation mechanism of the present invention includes a magnet, a movable iron core slidably provided in a direction to be separated from and attached to the magnet, and a magnet. An electromagnetic plunger having a yoke, which is moved between a position when the movable core is attracted to the yoke and a position when the movable core is separated from the yoke,
A moving member that slides the movable core in a direction in which the movable core moves toward and away from the magnet; and a driving unit that is supplied with an initial driving force by the electromagnetic plunger and the moving member to move the moving member. A cam gear for moving the supplied moving member is provided, and a biasing member is provided for applying a biasing force to the moving member. A connecting projection is formed on one of the movable iron core and the moving member, and the connecting protrusion is formed on the other. Is inserted and the width of the movable core in the sliding direction with respect to the magnet is formed to be slightly larger than the size of the connecting protrusion to connect the movable core and the moving member. A second side surface provided opposite to the first side surface, wherein when the movable core is slid by the moving member and comes close to the yoke, the movable core is attracted to the yoke and the connection protrusion is formed in the connection hole. One side Characterized by being adapted to abut the.

Therefore, in the electromagnetic operation mechanism of the present invention, the overstroke of the moving member for securely bringing the movable iron core into contact with the magnet (yoke) becomes unnecessary, and therefore, a special limiter for absorbing the overstroke of the moving member is not required. There is no need to provide any means, and this makes it possible to freely set the means for moving the moving member to the suction position and the positional relationship between the means and the moving member.

In the above-described embodiment, the connecting protrusion is formed on the moving member and the connecting hole is formed on the movable core. However, in some cases, the connecting hole is formed on the moving member and the connecting protrusion is formed on the movable iron core. May be formed.

In addition, the structures, shapes, and dimensional relationships of the respective parts shown in the examples are merely examples of the embodiment of the present invention, and the technical scope of the present invention is limitedly interpreted by these. must not.

[Brief description of the drawings]

The drawings show an embodiment in which the electromagnetic operation mechanism of the present invention is applied to an electromagnetic operation mechanism for preventing rotation of a cam gear and canceling the rotation of the cam gear in a cam gear type control device, and FIG. 1 shows the operation of the electromagnetic operation mechanism. (A) is an enlarged horizontal cross-sectional view of a main part, which is shown over time in (E), FIG. 2 is an exploded perspective view showing a cam gear type control device with a part cut away, and FIG. 3 shows a trigger lever and an electromagnetic plunger. Enlarged exploded perspective view,
FIG. 4 is an enlarged perspective view of the cam gear, and FIG. 5 is FIG. 1 (A).
FIG. 5 is a sectional view taken along the line V-V of FIG. DESCRIPTION OF SYMBOLS 1 ... Driving means, 4 ... Cam gear, 6 ... Electromagnetic operation mechanism, 7 ... Movable member, 8 ... Electromagnetic plunger, 9 ... Biasing member, 23 ... Connecting projection, 29 ... Yoke, 30 ... magnet, 32 ... movable iron core, 35 ... connecting hole, 35a ... first side, 35b ... second side

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 62-116513 (JP, U) Japanese Utility Model Showa 62-8610 (JP, U)

Claims (2)

(57) [Claims] 1. An electromagnetic plunger having a magnet, a movable core slidably provided in a direction in which the magnet is separated from and brought into contact with the magnet, and a yoke provided with the magnet, and wherein the movable core is attracted to the yoke. A movable member that is moved between a position when the movable core is located and a position when the movable iron core is separated from the yoke, and slides the movable iron core in a direction in which the movable iron core is separated from and brought into contact with the magnet; A driving unit that is supplied with an initial driving force by the moving member and moves the moving member; the driving unit includes a cam gear that is supplied with the initial driving force and moves and operates the moving member. A biasing member for applying a biasing force to the member; a connecting protrusion is formed on one of the movable iron core and the moving member; and the connecting protrusion is inserted into the other. And a connecting hole, in which the width of the movable core in the sliding direction with respect to the magnet is slightly larger than the size of the connecting protrusion, connects the movable core and the moving member. And a second side provided opposite to the first side, wherein the movable core is attracted to the yoke when the movable core is slid by the moving member and comes close to the yoke. An electromagnetic operation mechanism, wherein the connection protrusion contacts the first side surface of the connection hole. 2. The connecting projection is in contact with the second side surface when the movable iron core is slid in a direction approaching the yoke by the moving member. 2. The electromagnetic operation mechanism according to claim 1.