JPS61191381A - Rotary electric razor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to a rotary electric shaver, and relates to a rotary shaft and a motor drive shaft of an inner cutter stand that supports a plurality of inner cutter pieces in a vertically movable manner. This relates to the structure of the connecting part.

(b) Prior Art As an example of a rotary electric shaver to which the present invention is directed, a small electric appliance disclosed in Japanese Utility Model Application Publication No. 59-139928 will be presented. In this publication, the connecting member fitted onto the drive shaft of the motor has a cylindrical portion with a flat end and side surface.

The rotating shaft of the inner cutter base that fits into such a connecting member also has an insertion opening having an L-shaped cross section that matches the shape of the connecting member. By the way, when connecting the inner cutter stand to the motor, unless you determine the position of the flat surface of the connecting member and insert the connecting member into the insertion opening of the inner cutter stand rotating shaft, the inner cutter stand and motor will not be connected properly. The problem was that it couldn't be done.

The connecting member (Lot) shown in FIGS. 8 and 9 was devised to overcome the above-mentioned problems. A pair of guide walls (102) inclined in the diametrical direction (
104) (104) is formed. However, as shown in FIG.
05) The hypotenuse (
106) The problem that (106) gets caught on the periphery of the insertion port <105> has not been solved. Furthermore, if the motor (107) is driven in an incompletely connected state, the blade pressure (pressing force) of the inner blade element (108) against the inner surface of the outer blade is too large, causing the inner blade element (108) to move outward. There was also a risk that the rotation of the inner cutter stand (109) would stop due to it getting caught on the edge of the hair introduction hole of the blade.

(c) Problems to be solved by the invention In the conventional coupling device between the motor and the inner cutter stand, if the initial mounting method is inappropriate, it is automatically corrected in the appropriate direction. It's not.

The problem to be solved by the present invention is to improve the guide wall of the connecting member so that when the connecting member is inserted into the rotating shaft of the inner cutter stand, the rotating shaft and the connecting member are automatically aligned in the proper positional relationship. The goal is to develop a structure that can be corrected so that

(d) Means for solving the problem The rotating shaft of the disc-shaped inner cutter base that supports multiple inner cutter pieces so that they can move up and down is fitted into the drive shaft of the motor housed in the main body case. The connecting member is detachably attached to the connecting member, and the connecting member is constituted by a pedestal portion and a cylindrical portion vertically disposed on the upper surface of the pedestal portion. A guide wall is formed that gradually slopes higher along the line.

On the other hand, an insertion opening matching the cross-sectional shape of the pedestal portion may be provided on the rotation shaft of the inner cutter stand.

(e) Operation When the connecting member is advanced into the insertion opening, a propulsive force in the direction of rotation is applied to the guide wall by the periphery of the insertion opening, and when the positional relationship between the insertion/inlet and the guide wall is appropriate, the pedestal of the connecting member The part and the insertion port fit together securely.

(f) Example Hereinafter, an example in which the present invention is applied to a waterproof rotary electric shaver shown in FIGS. 1 to 7 will be described in detail.

(1) is a cylindrical exterior case made of ABS resin, which has an opening (2) at the bottom, a round hole (3) at the center of the top surface, and a pair of screw insertion holes <4 )(4)
has been established. A recess (5) is formed in one side of the exterior case (1), and the recess (5) has through holes (6) and (7) of different sizes, and a vertical direction between them. It has dowels (8) (8) at intervals, and a recess (5
) are provided with engaging walls (9) (9) at appropriate positions on the peripheral wall.

(10) has a large diameter ON switch button (11) and a small diameter OFF switch button (12), both buttons (11)
) < 12) is a rubber switch member having small holes (13) (13) through which the dowels (8) (8) are inserted, and on the inner side of both buttons (n) (t2). A contact member (14) made of a conductive polymer is attached and fixed to each of the contact members (14).

(15) has large and small holes (16) and (17) into which both the buttons (11) and (12> can be loosely fitted, and the recess (
5) Engagement claw (18) that can be engaged with the engagement wall (9) <9>
This is a switch cover provided with (18).

The navigation switch member <lO) is fitted with a dowel (5) in the recess 5).
8) After (8) and the small holes (13) are placed and arranged, the flange (19) is inserted into the switch cover (1).
5) and the bottom surface of the recess (5), and the switch cover (15) forms a part of the side surface of the outer case (1) when the switch cover (15) is attached. .

A circumferential groove (20) and a threaded groove (21) are formed in the lower part of the exterior case (1), and a rubber ring (22) is fitted into the circumferential groove (20), and the threaded groove (21) is inserted into the circumferential groove (20). ) is formed with engagement holes (24) (24>) which are opposed to each other in the diametrical direction.

(25) is an upper case placed on the upper part of the outer case (1), and the screw insertion hole (
4) It has screw holes (26) (26) that match with (4), and a circular hole (27) that matches the round hole (3) of the exterior case (1) in the center, and A hair receiving tray (28) is formed, and an inclined hair waste discharge path (29) communicating with the outside is provided at a corner of the hair receiving tray (28). The outlet (30) of this hair waste discharge path (29) is equipped with a shutter that is slidable along the peripheral wall of the external case (1).
31〉 is installed, and this shutter is integrated (31)
The opening and closing of the outlet (30) is performed by the sliding movement of the outlet (30).

Furthermore, a pum packing (32) is provided which can be fixed in a liquid-tight manner between the circumference of the circular hole (27) of the upper case (25) and the edge of the circular hole (3) of the outer case (1). ,
Further, the upper case (25) is fixed to the upper part of the outer case (1) via screws (33) (33).

(34) is an outer cutter frame made of synthetic resin that has an inner thread groove (36) that screws into an outer thread groove (35) formed on the outer peripheral wall of the hair receiving tray (28), and which introduces a large number of hairs. The outer peripheral flange of a dome-shaped stainless steel outer blade (37) provided with holes is integrally formed and held using an insert method. (38) is an inner blade piece (39) that rotates and slides on the inner surface of the outer blade (37).
39) is a disc-shaped inner cutter stand that supports vertically movable;
A protrusion (401() formed on the inner wall of the outer cutter frame (34)
The inner cutter stand (40) is provided with a retaining plate (43) having engaging claw bodies (41) (41) on the outer periphery and provided with hair waste permeation holes (42) (42>). 38) is held within the surface-shaped outer cutter frame (34).The rotating shaft (44) of the inner cutter stand (38) has a circular hole (45) passing through it, which is connected to the retaining plate (38).
43).

(46) has a lower opening (
It is an interior case that is inserted into the interior case from 2), and has vertical walls A (48) and B (49) hanging from the top surface (47).
), a motor (53) having a drive shaft (52) is placed and housed in a space (51) surrounded by C (50), and a dry battery (54) is housed inside. . The upper surface (47) has a circular opening (56) in the center through which the 10-pole terminal (55) of the dry battery (54) is exposed.
), and supporting pieces (57) (57) for elastically supporting the bottom of the motor (53) are formed in the vicinity thereof by cutting out the upper surface (47) in a fold-back shape.

(58) is a flexible printed circuit board, the negative end of which is directly connected to the IC (59), and the other end of which is a lead portion (60) connectable to the terminal of the motor (53). Small holes (61) (at) arranged vertically are formed approximately at the center of (58), and these small holes (61) (
61) and turn the ON/OFF contact horn (62) (
63), and dowels (64) (64) are formed in the vertical wall A (48) facing the small holes (61) (61).

The printed circuit board (58) is attached to the dowel (64) (
64) and the small holes (61) (61) are aligned and positioned, and fixed to the outer surface of the vertical wall A (48) using an adhesive. At this time, the IC (59) is connected to the motor (
53) and the standing wall C (50).

(65) is the printed circuit board 58) and the dry battery (5).
This is a lead plate that electrically connects the negative pole of 4) and can be fixed to the side surface of the interior case (46). Elongated holes (66) (66) are formed in this lead plate (65), the upper end is used as a connection part (67) to the substrate (58), and the lower end is formed with a curled part (68) for connection. Coil spring (69) for contacting the negative pole of the dry battery (54) at the curled part (68)
One end of the is held conductively. This coil spring (69) is therefore rotatable by the curled portion (68). On the side surface of the interior case (46), projections (71) (71) are provided in the vertical groove (70) to form the elongated hole (66).
) (66), and the lead plate (65) connects these protrusions (71>(71) with elongated holes (66).
) (66) and is fixed to the side surface of the interior case (46) by burning and crushing the exposed portion thereof. (7
2) (72) is an elastic engagement pawl consisting of an elastic piece formed by cutting out a part of the side surface of the lower part of the interior case (46) and a pawl completely formed at the tip thereof. This elastic engagement claw (7
2) (72) is the engagement hole (
24) (24), and both cases (1) and (46) are engaged and fixed to each other.

A flange (73) is formed at the lower end of the interior case (46), and this flange (73) is used to protect the exterior case (1) when the interior case (46) is inserted into the exterior case (1). It comes into contact with the lower end of the small diameter cylindrical portion (23) and prevents further insertion.

(74) is a bottom case having an internal thread groove (75) that screws into the external thread groove (21) of the small diameter cylindrical portion (23) of the outer case (1). This bottom case <74) is removably screwed onto the outer case (1), and the dry battery (54) housed in the inner case (46) can be replaced by attaching and detaching the bottom case. Ru. Appropriate contact pressure is applied to the coil spring (69) against the negative pole of the dry battery (54) when the bottom case (c) is attached.

<76) is a synthetic resin connection interposed between the drive shaft (77) of the motor (53) and the rotating shaft (44) of the inner cutter stand (38) to mechanically connect the two. It is a member. This connecting member (76) has a pedestal part (78) and a cylindrical part (79) that stands vertically on the upper surface of the pedestal part (78), and extends from the cylindrical part (79) to the pedestal part (78). stand (
Guide 1 inclined so that the rotation direction side is higher along the rotation direction (80) of 38)! (81) is formed.

This guide wall (81) may be built up as shown in FIGS. 1 and 2, or may be formed by cutting as shown in FIG. 3.

In addition, the insertion opening (82) for the inner cutter stand (38) rotation shaft (44)
corresponds to the shape of the pedestal (78).

In the rotary electric shaver having the above configuration, when connecting the inner cutter stand (38) to the drive shaft (77) of the motor (53) via the connecting member (76), the connecting member (76)
) into the rotation axis 44) insertion opening (82) of the inner cutter stand (38), the pedestal part (78) of the connecting member (76)
If the positional relationship between and the insertion port (82) is not appropriate,
The peripheral edge of the insertion port (82) hits the guide wall (81), and at this time, the guide wall (81) obtains a moment directed in the rotation direction of the inner cutter stand (38) due to the pressing force from the peripheral edge of the insertion port (82). The connecting member (76) rotates in the rotational direction (80) of the inner cutter stand (38) until the pedestal (78) and the insertion opening (82) are in proper position.During this period, the connecting member (76) As the insertion of the cylindrical portion (79) into the rotating shaft (44) progresses, the pedestal portion (78) and the insertion opening 82) fit into each other almost at the same time as they become in a proper positional relationship.

Therefore, even if the positional relationship between the insertion port (82) and the pedestal (78) is not adjusted in advance, the rotation axis of the inner cutter stand (38)
Proper connection between the inner cutter stand (38) and the drive shaft (77) of the motor (53) can be obtained by simply pushing the connection member (76) into the inner cutter (38).

Motor (53), flexible board (58), IC (5
9), the lead plate (65), and the fill spring (69) are respectively arranged and fixed in the interior case (46) as described above, and the rubber backing (32) is sandwiched between them, and the screws (33) (
33), the recess (5) and the switch cover (
15), and the switch member (10) is clamped and fixed.

A motor (53) is installed inside the outer case (1) of the assembled body.
) so that the drive shaft (77) of the outer case (1) passes through the circular hole (3) of the outer case (1), the rubber backing (32), and the circular hole (27) of the upper case (25) and protrudes upward. (46). At the end of insertion, the elastic engaging claw (
72) (72) engages with the engagement holes (24) (24), and the flange (73) abuts the lower end of the small diameter cylindrical portion (23). This inner case (46) can be easily inserted by simply inserting it into the outer case (1), and the elastic engagement claws (72) (72) are located at the bottom of the outer case (1) when dividing. Therefore, the engagement can be easily released and repair work can be simplified.

A dry battery (54) is housed inside the interior case (46), a coil spring (69) is brought into contact with the - pole of the dry battery (54), and the bottom case (74) is inserted into the small diameter cylindrical part (23).
By screwing them together, - electric shavers are completed. The ten poles of the good quality dry battery (54) come into contact with a contact plate (not shown), and this contact plate is connected to the printed circuit board (58).

When you use the completed electric razor, the inner blade element (39)
The hair chips cut by the outer blade (39) and the outer blade (39) are removed from the removal prevention plate (4).
3) and accumulates in the saucer section (28). When washing, the accumulated hair is removed together with the water through the hair removal channel (29).
> and then the exit (3) is opened by opening the shutter (31).
0).

(g) Effects of the invention As explained above, the rotating shaft of the disc-shaped inner cutter base that supports a plurality of inner cutter pieces in a vertically movable manner is connected to the drive shaft of the motor housed in the main body case. The connecting member is removably attached to the connecting member to be fitted, and the connecting member is constituted by a pedestal portion and a cylindrical portion vertically disposed on the upper surface of the pedestal portion, and the inner cutter base extends from the cylindrical portion to the pedestal portion. By forming the guide wall that slopes along the rotational direction of the blade, no matter what positional relationship the insertion opening of the inner cutter stand has with respect to the connecting member,
As long as the cylindrical part is inserted into the insertion slot, the pedestal part will automatically fit into the insertion slot and a proper connection state will be obtained, eliminating the troublesome trouble of checking the installation position as in the past. Damage to the blade due to imperfections can also be prevented.

[Brief explanation of the drawing]

Figures 1 to 7 [1] relate to the rotary electric shaver of the present invention;
FIG. 1(a) is a general perspective view of the connecting member, FIG. 1(b) is a top view of FIG. 1(a), FIG. 2 is a plan view showing the positional relationship between the connecting member and the insertion port, and FIG. a) and (b) are shown in Figure 1 (a)
) and (b) respectively, FIG. 4 is an overview perspective view of the electric shaver, and FIG.
The figure is a longitudinal sectional view of FIG. 4, FIG. 6 is an exploded perspective view of the main part of FIG. 4, and FIG. 7 is an exploded perspective view of the interior case and its storage parts. Figures 8 and 9 relate to conventional electric shavers, and Figures 8 (a), (b), and (c) are conventional examples corresponding to Figures 1 (a), (b), and 2, respectively. The general perspective view, top view, and plan view of FIG. (39)...Inner blade piece, (38)...Inner blade stand, (1
)...Body case, (53)...Motor, (77)
... Drive shaft, (76) ... Connection member, (78) ...
- Pedestal part, (79)... Cylindrical part, (81)... Guide wall.

Claims (1)

[Claims] (1) The rotating shaft of the disc-shaped inner cutter base, which supports multiple inner cutter pieces in a vertically movable manner, is removably attached to a connecting member fitted to the drive shaft of a motor housed in the main body case. The connecting member is constituted by a pedestal part and a cylindrical part vertically disposed on the upper surface of the pedestal part, and a guide wall extending from the cylindrical part to the pedestal part and tilting along the rotational direction of the inner cutter stand is provided. A rotary electric razor characterized by forming.