JPH0326346Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to a mechanism for converting reciprocating linear motion of a sliding member into intermittent rotational motion of a rotating member such as a pinion.

(Prior Art) A ratchet mechanism is known as a mechanism that periodically rotates a gear or the like in a fixed direction. This ratchet mechanism has a drive pawl and a regulation pawl meshed with a gear, and one rotation of the drive pawl causes the gear to rotate one frame.In order to prevent the gear from returning to rotation with the restriction pawl, the restriction pawl is moved in the direction of the gear by a spring. is energized.

Furthermore, not only the above-mentioned ratchet mechanism but also generally applied intermittent rotation mechanisms combine gears and pawls.

(Problems with the prior art) Since the conventional intermittent rotation mechanism described above combines gears and pawls, there is a limit to how small the mechanism itself can be made, and furthermore, a return spring must be provided for the pawls, which is extremely difficult to achieve. It is difficult to assemble into a limited space, and the manufacturing of the members that make up the mechanism is also troublesome. Further, the conventional mechanism generates a large amount of operating noise due to the engagement between gears and pawls, and cannot operate at high speed.

(Purpose of the invention) The present invention was developed in view of the above-mentioned conventional problems, and its purpose is to achieve a device that can be significantly smaller than the conventional one, has easy manufacturing of component parts, and is suitable for high-speed operation. An object of the present invention is to provide an intermittent rotation mechanism that can also reduce operating noise.

(Structure of the invention) In order to achieve the above object, the present invention has a magnetic pin slidably inserted into a through hole of a slide member that can reciprocate with respect to a case, and a magnet pin is slidably inserted into a through hole of a slide member that can be moved reciprocally with respect to a case, and a magnetic pin is provided on one side of the slide member opposite to the slide member. A fixed body in which a magnet part whose part is the N pole and a magnet part which is the S pole are arranged spaced apart or adjacent to each other along the moving direction of the slide member are stacked in a case, and the magnet part is placed on the other surface of the slide member. Moving members such as racks with recesses into which the pins fit are spaced apart in the length direction are stacked in a case, and a rotating member such as a pinion is engaged with the moving members such as racks, and when the slide member reciprocates. The magnetic pin is attracted and repelled by the magnet part of the fixed body, and the magnetic pin is engaged and disengaged from a recessed part of the rack etc. by this attraction and repulsion, thereby causing the pinion etc. to perform intermittent rotational movement.

(Example) An example of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a longitudinal sectional view of the mechanism according to the present invention, FIG. 2 is a sectional view taken along the line A--A in FIG. 1, and FIGS. 3 and 4 are sectional views explaining the operation of the mechanism.

In the figure, 1 is a case, and a slide member 2 is slidably provided in the case 1, and the slide member 2 is moved by a solenoid or the like (not shown). Further, a thick wall portion is formed in the center of the slide member 2, and a through hole 3 is bored in this thick wall portion, and a magnet pin 4 is slidably inserted into the through hole 3. Further, springs 5, 5 are interposed between the inner surface of the case 1 and both ends of the thick portion, so that the slide member 2 is maintained at a neutral position when no force is applied to the slide member 2.

On the other hand, a fixed body 6 fixed to the case 1 is arranged on the upper surface of the slide member 2, and this fixed body 6 has three magnets 7, which are spaced apart in the direction of movement of the slide member 2.
8 and 9 are buried so that the magnets 7 and 9 have the same magnetic pole direction, and the magnet 8 has the magnetic pole direction opposite to that of the magnets 7 and 9. For example, if the part of the magnet pin 4 facing the fixed body 6 is the N pole, the part of the magnets 7 and 9 facing the slide member 2 is the S pole, and the part of the magnet 8 facing the slide member 2 is the S pole. Let be the N pole.

Further, a rack 10 that is movable with respect to the case 1 is disposed on the lower surface side of the slide member 2, and a plurality of recesses 11 are formed in the upper surface of the rack 10. The recesses 11 are sized to fit the magnet pins 4, and the distance between the recesses 11 is equal to the distance between the magnets 7, 8 and 8, 9 embedded in the fixed body 6. Furthermore, Rack 10 is Pinion 1
2, and the rotating shaft 12a of this pinion 12 is connected to the operating body 13. The operating body 13 includes an operating piece 14, and when the operating body 13 rotates, the operating piece 14 switches the limit switches 15a, 1.
5b and 15c are selectively activated.

Next, its effect will be explained. Here, it is assumed that the reference position is a position where the slide member 2 is in the neutral position shown in FIG. 3 and the magnet pin 4 is aligned with the magnet 8 of the fixed body 6. In this state, the magnet pin 4 is repelled by the magnet 8, and the recess 1 of the rack 10
1 is fitted.

When the slide member 2 is moved from this state, for example, in the direction a in FIG. , the pinion 12 rotates. The rotation of the pinion 12 also rotates the operating body 13, and this rotation causes the operating piece 14 to move away from the limit switch 15a and toward the limit switch 15b.

Since the magnet pin 4 is set to match the magnet 7 when the slide member 2 reaches its travel limit, the magnet pin 4 is attracted by the magnet 7 when the slide member 2 reaches its travel limit. , the slide member 2 is pulled out from the recess 11, and the engagement between the slide member 2 and the rack 10 is released.

This state is shown in FIG. That is, in the state shown in FIG. 4, the operating piece 14 operates the limit switch 15b.

Then, when the driving force acting on the slide member 2 is released, the slide member 2 returns to the reference position shown in FIG. 3 by the elastic force of the springs 5, 5. In the return movement, since the magnet pin 4 is directed out of the recess 11, only the slide member 2 returns. Then, when the slide member 2 returns to the reference position. Since the magnet pin 4 coincides with the magnet 8, the magnet pin 4 is repelled and fits again into another recess 11 adjacent to the recess 11.

Thereafter, when the slide member 2 is moved downward in the direction b in FIG. 3, the magnet 9 acts in the same manner as the magnet 7, the operating piece 14 separates from the limit switch 15b, and the limit switch 15a is operated again.
To operate the limit switch 15c, after returning the slide member 2 to the reference position,
The slide member 2 is moved in the b direction again.

In the illustrated example, three magnets are embedded in the fixed body 6, but the number is arbitrary. For example, a large number of magnets with their magnetic poles reversed, arranged alternately, and recessed portions 1 provided in the rack 10.
If a large number of limit switches 1 are provided, the limit switches can be operated one after another by one movement of the slide member 2.

FIG. 5 is a diagram showing an embodiment of the fixed body 6. The fixed body 6 is entirely composed of a permanent magnet, and the fixed body 6 is composed of magnet parts 16 and 17 having different magnetic poles in the portion facing the slide member 2. It's summery. With such a configuration, the same effect as when three magnets are buried is achieved.

Further, the mechanism according to the present invention can be applied not only to actuating a predetermined limit switch of an electric device, but also to a variety of other uses, an example of which is shown in FIG. FIG. 6 shows an example in which the damping force adjustment of a shock absorber is applied. In this shock absorber, a hollow rod 20 having a piston 19 fixed thereon is slidably fitted into a cylinder 18, and the pinion 1 is inserted into the hollow rod 20.
Insert the operating body 13 connected to the operating body 1.
A plate body 21 having a plurality of orifice holes 21a is fixed to the lower end of the rotor 3, and the orifice holes 21a and oil holes 22 are aligned to adjust the damping force. Here, the orifice hole 21a corresponds to the operating piece 14 described in the embodiment.

In addition, in the case of the present invention, since the frequency of collision between the magnet and the magnet pin is high, in order to extend the life of these parts, it is possible to coat at least one of the magnet or the magnet pin with aluminum foil or a resin film. good.

(Effects of the invention) As explained above, according to the invention, a fixed body is stacked on one side of a sliding member that can freely slide with respect to the case, and a rack is stacked on the other side, and a magnetic pin provided on the sliding member is attached to the fixed body. The slide member and the rack are engaged and disengaged by attracting or repelling the magnetic part provided in the slide member, and the linear motion of the slide member is intermittently transmitted to the rack, so that the pinion meshing with the rack can be rotated by a desired angle. As a result, compared to conventional intermittent rotation mechanisms, it is significantly smaller in size, noise associated with operation can be reduced, the mechanism itself is easy to assemble, and high-speed operation can be ensured, among other benefits. have

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of the mechanism according to the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, Figs. 3 and 4 are sectional views explaining the operation, and Fig. 5 is a fixed body. FIG. 6 is a perspective view showing another embodiment of the present invention, and FIG. 6 is a longitudinal sectional view showing a modified part of the operating section. In addition, in the drawing, 1 is a case, 2 is a slide member,
3 is a through hole, 4 is a magnet pin, 6 is a fixed body, 7,
8, 9, 16, 17 are magnets, 10 is rack, 11
is a recess, and 12 is a pinion.

Claims (1)

[Scope of utility model registration request] a slide member that makes reciprocating linear motion with respect to the case; a magnet pin that is slidably inserted into a through hole formed in the slide member; and a magnet pin that is fixed in the case so as to overlap one surface of the slide member and faces the slide member. a fixed body in which a magnet part whose part is the north pole and a magnet part which is the south pole are provided spaced apart or adjacent to each other in the moving direction of the slide member; and a fixed body provided in the case so as to overlap the other surface of the slide member It is characterized by consisting of a moving member provided with a plurality of recesses in the length direction at equal intervals to the spacing of the magnet parts, into which the magnet pins inserted into the sliding member fit, and a rotating member that engages with the moving member. Intermittent rotation mechanism.