JPS6223435Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to an electromagnetic drive device such as an electric shaver or an electric hair clipper, and particularly relates to a switching structure for switching the frequency, voltage, etc. of a power source as necessary.

(Background of the Invention) Conventionally, as a power supply switching device for an electromagnetic drive device such as an electric shaver, a switching knob 90 is formed of a rotating shaft 91 and a disk body 92 as shown in FIG. 10(a), and by rotating the switching knob 90, a flexible moderation securing member 93 extending from the disk body 92 is engaged.
In one known technique, the tip projection 94 of the connector is fitted into positioning recesses 96 and 97 formed in a wiring board 95.
Due to the sliding friction generated between the protrusion 94 and the base plate 95 during the rotation of the switching knob 90, the moderation ensuring member 93 is likely to bend upward as shown in FIG. 10b. When this happens, the switching knob 90 formed integrally with the moderation ensuring member 93 is tilted as shown in the figure. As a result, the terminal portion 98 on the switching knob 90 side and the terminal portion 99 on the base plate 95 side are inclined.
In addition, if the molding precision or assembly precision of the base plate 95 and the switching knob 90 is poor, the sliding friction between the projection 94 and the base plate 95 will vary, adversely affecting the feel of the switching knob 90 and the rotational operability, which necessitates strict parts management and assembly precision.

(Purpose of the invention) The purpose of the invention is to provide a device that has excellent moderation and rotational operability of the switching knob, and also has excellent contact and separation between the terminal part on the switching knob side and the terminal part on the wiring board side. .

(Summary of the invention) The present invention provides a structure in which a switching knob for a power source, etc. is rotatably attached to a switching board, and a terminal part of the switching knob and a terminal part of the switching board can be freely connected to and separated from each other. A ring body made of an independent separate piece is loosely fitted around the outer circumference of the switching knob, and a moderation ensuring member that flexibly slides into contact with the outer circumference of the switching knob is formed inside the ring body. In this way, the ring body equipped with the moderation ensuring member,
By forming it as a separate piece independent of the switching knob, only the ring body loosely fitted to the switching knob can freely move due to the sliding friction with the moderation ensuring member that occurs when the switching knob is rotated. This prevents an unnecessarily large external force (sliding friction) from acting on the switching knob, thereby preventing the switching knob from being inclined and causing poor contact between the terminal portions, as in the conventional device. In addition, by configuring the ring body to be loosely fitted separately to the switching knob, it is possible to absorb molding errors and assembly errors between the two, thereby preventing variations in the sense of moderation and making it possible to rotate the switching knob. It improves sexuality.

(Example) Hereinafter, an example will be described with reference to the drawings, taking as an example an example in which the present invention is applied to a switching mechanism for a power source of an electric shaver.

1 and 2 are exploded perspective views, and FIGS. 3 and 4 are front views and side sectional views, respectively, of the assembled state.
2 is a left case piece, and 2 is a right case piece, and the case A is constructed by making them face each other and integrating them. Case A is equipped with electromagnetic drive mechanism B, and right case piece 2 is equipped with switch mechanism C.
A razor blade assembly D is attached to the upper part of the case A.

The electromagnetic drive mechanism B includes a U-shaped silicon steel laminated magnetic core (hereinafter referred to as core) as shown in Fig. 2.
A coil winding frame 5 around which an excitation coil 4 is wound is inserted into the coil winding frame 3, and a support shaft 7 is attached to a pair of mounting frames 6 fixed on the upper part of the coil winding frame 5.
A vibrator 8 driven by the iron core 3 is suspended from the support shaft 7.

The coil winding frame 5 is made of a synthetic resin with high electrical insulation properties such as polyamide resin or polycarbonate resin, and as shown in FIG.
is provided vertically, and four protrusions 9 are inserted into the standing wall 5a, and two leg rods 5b are provided protrudingly.
A switching board, which will be described later, is fixed to the lower ends of these protrusions 9 and leg rods 5b.

A surrounding wall 5c that surrounds the bottom of the iron core 3 is vertically provided inside the vertical wall 5a. The protrusion 9 is made of a conductive material, and the end 4' of the excitation coil 4 is wound around the protrusion 9 and preferably fixed to the protrusion 9 by soldering.
This prevents the wire from breaking, and also prevents the end portion 4' from interfering with the assembly of other parts. Also, the standing wall 5a
firmly holds the protrusion 9 and leg rod 5b, and further secures the surrounding wall 5.
c insulates the lower part of the iron core 3.

10 is a switching board on which a switching circuit is wired, and as shown in FIG. 2, there is a fitting hole 12 on one side for rotatably mounting a power supply switching knob 11 (described in detail later), and on the other side. The power supply terminal pins 18a, 18
Attachment holes 13a and 13b are formed into which b is inserted. Furthermore, grooves 14 are formed at the four corners of the four protrusions 9 into which the lower ends of the four protrusions 9 are inserted and fixed by soldering, and small holes 17 are formed into which the lower ends of the leg rods 5b are inserted. . In this way, the switching board 10 is firmly fixed by the protrusion 9 and the leg rod 5b so as not to shift below the coil winding frame 5.

5a, b, and c are respectively a plan view, a bottom view, and a cross-sectional view of the switching board 10, and the lower surface of the switching board 10 has terminal portions 15a, 15b, 15c, and 15d surrounding the insertion hole 12. A terminal group 15 is provided, and terminal portions 16a, 16c, and 16d facing each of the grooves 14 are formed, and a lower end contact portion C of the contact portion C2 of the switch mechanism C is provided.
2' (see FIG. 1) are formed as contacts A and B. The terminal portion 15a is the terminal portion 16c.
, the terminal portion 15b is connected to the terminal portion 16d, and the terminal portion 15 is connected to the terminal portion 16d.
C is connected to a terminal portion 6b (described later), and a terminal portion 15d is connected to a contact point RO and a terminal portion 16a by printed wiring lead plates 19a, 19b, 19c, and 19d, respectively. Further, on the upper surface of the switching board 10, a terminal part 16b facing the groove 14 is formed, and the terminal part 16b and the terminal part 15c, the power supply terminal pin 18a and the terminal part 16c, and the power supply terminal pin 18b.
Lead plates 19e and 1 connect contact A and A, respectively.
9f and 19g are printed wiring.

FIG. 7 is a perspective view of the switching knob 11, which includes a cylindrical knob 11a, a pair of protrusions 11b, 11b projecting outward from the knob 11a, a collar 11c, and the center of the upper surface. It consists of a fitting protrusion 11d protruding from. A plurality of grooves 11d' are formed in the protrusion 11d to impart elasticity, and the protrusion 11d is forcibly fitted into the insertion hole 12 of the switching board 10 to rotatably attach the switching knob 11 to the switching board 10. A groove 11f for embedding the terminal parts 11e, 11e on the side facing the switching board 10 of the collar part 11c,
11f is formed in a V-shape, and the switching knob 11
By rotating the terminals 11e and 11e buried in the grooves 11f and 11f and the terminals 15a to 15d on the switching board 10 side, the terminals 11e and 11e can be moved toward and away from each other, so that the voltage can be switched as appropriate.
A cut groove 11g is formed on the lower surface of the knob 11a (see Fig. 5c), and when the switching board 10 is fixed to the bottom of the case A, the knob 11g is formed as shown in Fig. 5c.
The lower part of 1a is an opening 4 formed at the bottom of case A.
It is exposed from 9, and the user can cut coins etc. into the groove 11g.
to perform rotation operation.

Reference numeral 20 denotes a ring body for ensuring moderation of the switching knob 11 (see FIGS. 1, 5c, and 8), and is made of flexible synthetic resin such as polyacetal resin, and is made of a flexible synthetic resin such as polyacetal resin. It is loosely fitted to the outer periphery of the switch knob 11 as a separate piece so as to be freely slidable in the axial direction of the switch knob 11 and in the longitudinal direction of the case A, independently from the switch knob 11. To explain its shape and structure along FIG.
A pair of protrusions 20a,
These protrusions 20a, 20b are provided between a pair of stopper ribs 50, 51 that protrude along the vertical direction of the inner surfaces of the left and right case pieces 1, 2, respectively. Inset (first
(See also figure). Further, inside the ring body 20, there are formed a circular hole 20c that loosely fits into the knob 11a of the switching knob 11, and arcuate openings 20d and 20e that allow rotation of the protrusions 11b and 11b by a certain angle (90 degrees). However, a moderation ensuring member 20f is formed in an arcuate shape in one opening 20d.

This moderation ensuring member 20f is a stiff member that ensures the moderation of the switching knob 11 and has sufficient flexibility, and when the switching knob 11 is rotated from the solid line position to the chain line position in FIG. Protrusion 11 on its outer periphery
b rotates while temporarily sliding in flexible contact with the moderation ensuring member 20f (see the broken line in the same figure), and at this time, the finger performing the rotation operation feels a moderate sliding resistance, that is, a feeling of moderation. I can do it. In addition, since the moderation ensuring member 20f exists in this way, the external force of vibration accompanying the drive of the drive mechanism B,
There is no risk that the switching knob 11 will rotate unnecessarily and the power source will be switched. Further, the ring body 20 can be assembled by loosely fitting it into the switching knob 11 and then simply covering it with the left and right case pieces 1 and 2 from both sides. In this case, as clearly shown in FIG. 1, the protrusions 20a and 20b of the ring body 20 are connected to a pair of stopper ribs 5 formed long in the vertical direction on the inner surfaces of the left and right cases 1 and 2.
0 and 51, the ring body 20 itself does not rotate in conjunction with the rotation operation of the switching knob 11. Further, since the stopper ribs 50, 51 are formed to be long in the vertical direction, the protrusions 20a, 20b of the ring body 20 can freely move in the vertical direction.
Further, as clearly shown in FIG. 5c, it is loosely fitted to the switching knob 11 with a gap P. Therefore, by rotating the switching knob 11, the protrusion 11 of the switching knob 11 is rotated.
When the moderation ensuring member 20f of the ring body 20 makes temporary sliding contact with the moderation securing member 20f of the ring body 20, the direction (up and down) that adversely affects the contact and separation between the terminal portions 11e, 11e and the terminal portions 15a to 15d during this sliding contact. Since the ring body 20 is an independent separate piece that can move vertically independently of the switching knob 11, even if a force having a component in the vertical direction acts on the ring body 20, only the ring body 20 will move in the vertical direction. Move quickly. Therefore, during the rotation operation, the switching knob 11 receives a vertical force from the side of the ring body 20 provided with the moderation ensuring member 20f and is unnecessarily inclined, causing the terminal portions 11e and 11e of the switching knob 11 and the terminal portions 15a to 15a of the switching board 10 to 15d does not cause poor contact.

The wiring diagram of the switching circuit is shown in Fig. 6, where one end of the excitation coil 4 is connected to the power supply terminal pin 1 connected to the power supply.
8a, and the other end is connected to a power supply terminal pin 18b through a switch mechanism C, and terminal portions 15, 16a to 16d are connected to the intermediate point thereof.
Here, when the switching knob 11 is turned to the left with a coin or the like as described above, the terminal portion 11f is turned as shown by the solid line in Fig. 6.
As a result, the terminal portion 15a and the terminal portion 15b, and the terminal portion 15c and the terminal portion 15d are short-circuited, and the excitation coil 4 is short-circuited.
It can be used with a power supply voltage of 120V by creating a parallel circuit. Also, if you turn it clockwise, the terminal part 1 will turn as shown by the dotted line in Figure 6.
5a and the terminal portion 15b are open, and the terminal portions 15b and 15c are short-circuited to form a series circuit of the excitation coil 4, which can be used at 240V. In addition, in FIG. 5b, the terminal plate 11f indicated by the dotted line corresponds to the former case.
The terminal plate 11f at the chain line position shows the latter case.

In FIG. 2, reference numeral 21 is an insulating plate made of a synthetic resin with excellent insulation resistance, such as polycarbonate, and is attached to the bottom of the iron core 3 and the left and right case pieces 1 and 2 to ensure the insulation of the iron core 3. There is. 21a is a hole into which the leg rod 5b is inserted. Further, in FIG. 1, reference numeral 22 denotes an amplitude resonance spring, which adjusts the amplitude of the vibrator 8. A driving rod 23 is installed on the top of the vibrator 8, and this is connected to the left and right cases 1,
Window 24 formed at the top when 2 is fitted and combined
protrude from A hair stopper packing 26 is attached to this window 24. Further, the inner blade 30 of the razor blade assembly D is attached to the drive rod 23 via a spring tray 27, a coil spring 28, and a washer 29. Further, a driving pin 31 is provided protruding from the driving rod 23.
The movable blade 34 is inserted into the recess 33' of the connecting plate 33 attached to the inner wall of the case 32 constituting the razor blade assembly D, and the movable blade 34 is driven, and the fixed blade 35 performs shaving.

In FIG. 1, reference numeral 36 denotes a lock button, which is attached via a coil spring 37 to an opening 38 in the upper part of the side wall of the left and right cases 1 and 2. The upper protrusion 36' of the lock button 36 is engaged with a locking groove 39 formed inside the side wall of the case 32, and the case 32 is changed to the case A.
will be installed on the In addition, the lock button 36 is locked by the coil spring 3.
7 to disengage the protrusion 36' from the groove 39, the case 32 can be removed from the case A.

The switch mechanism C has an operating part C1 and a vertically long contact part C.
2, the inner protrusion 40 of the operating part C1 is inserted into the vertically elongated hole 41 of the right case piece 2, and the tip of the protrusion 40 is inserted into the small hole 42 of the contact part C2 to be attached to the right case piece. The contact part C2 is housed in a small gap inside the right case piece 2, but its lower end is bent to form a contact part C2' that extends downward to the switching board 10, and when the operating part C1 is slid upward, The contact portion C2' contacts the contacts A and B on the lower surface of the switching board 10 to close the switching circuit. Numeral 43 is a tightening screw that passes through the through hole 44 of the left case piece 1 and screws into the tightening hole 45 of the right case piece 2 to connect the left and right case pieces 1 and 2.
Combine. Reference numeral 46 is a mounting screw for the drive device B, which passes through a hole 47 in the lower center of the iron core 3 and is screwed into a tightening hole 48 in the inner wall of the right case 2. Furthermore, with the above configuration, the switching board 10 with the power switching circuit wired thereon is equipped with the switching knob 11, and then this switching board 10 is attached to the plurality of protrusions 9 protruding from the coil winding frame 5 and the leg rod 5b. Since it can be fixed and integrated, it can be easily incorporated into the case A as it is, and assembly is easy. In addition, connection between each terminal and contact point is reliable, and disconnection can be prevented by winding and fixing the coil end 4' around the conductive protrusion 9 as described above. This ensures insulation at the bottom of the iron core 3.

(Effects of the Invention) As explained above, the present invention provides a ring body 20, which is a separate piece independent of the switching knob 11, attached to the outer periphery of the switching knob 11 rotatably mounted on the switching board 10.
Since the moderation securing member 20f is formed inside the ring body 20 and flexibly slides into contact with the outer periphery of the switching knob 11, the switching knob 11 and the ring body are fitted together freely during rotation operation. Only the annular body 20 moves freely due to the sliding friction that occurs between the switching knobs 11 and 20.
Since the switching knob 11 is not subjected to a large force from the
11e and terminal parts 15a to 15d on the switching board 10 side
These can be reliably brought into contact and separated without causing contact failure. In addition, since the ring body 20 is loosely fitted into the switching knob 11 so as to be freely movable, these 1
It is possible to absorb molding errors and assembly errors of 1 and 20, thereby preventing variations in moderation and improving rotational operability.

[Brief explanation of the drawing]

The figures show an example in which the present invention is applied to an electric shaver, in which Fig. 1 is an exploded perspective view, Fig. 2 is a partially exploded perspective view of the electromagnetic drive mechanism, and Figs. 3 and 4.
The figures are a front view and a side sectional view of the assembled state, Figures 5a, b, and c are explanatory diagrams of the switching board, Figure 6 is a wiring diagram of the switching board, Figure 7 is a perspective view of the switching board, and Figure 8 9 is a plan view of the ring, FIG. 9 is an explanatory diagram of the switching knob, and 10
Figures a and b are a perspective view and a sectional view of a conventional device. 3... Magnetic core, 4... Excitation coil, 4'...
Excitation coil end, 5... Coil winding frame, 10... Switching board, 11... Switching knob, 11e, 15a to 15
d...terminal part, 20...ring body, 20f...moderation ensuring member.

Claims (1)

[Claims for Utility Model Registration] (1) A switching board 10 is fixed to the lower end of the coil winding frame 5 attached to the magnetic core 3, and the end of the excitation coil 4 wound around the coil winding frame 5 is attached to the switching board 10. An electromagnetic drive mechanism B is provided inside the case A, and a switching knob 11 for a power supply or the like is mounted on the switching board 10 so as to be rotatable about its axis. The terminal portion 11e of the switching knob 11 and the terminal portions 15a to 15d of the switching board 10 are formed so as to be able to come into contact with each other. A moderation securing member 20f is formed inside the annular body 20 to be slidably and non-rotatably fitted in the longitudinal direction of the case A and to be in flexible sliding contact with the outer periphery of the switching knob 11. An electromagnetic drive device having a switching mechanism for a power source, etc., characterized in that: (2) The electromagnetic drive device having a switching mechanism for a power source, etc. as set forth in claim 1 of the above-mentioned utility model registration claim, wherein the moderation ensuring member 20f is formed in an arcuate shape.