JPS594613Y2 - reciprocating electric razor - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a reciprocating electric shaver in which a blade block is configured to be reciprocally movable.

In this type of electric shaver, a blade block consisting of a fixed blade and a movable blade held in a blade holder is arranged at the upper end of a case housing a motor etc., and a bearing fixed to the case is attached to the tip. The movable blade is reciprocated by supporting a cam shaft having an eccentric cam and rotating the eccentric cam via the rotating shaft connected to the rotating shaft of the motor.

In such an electric shaver, a bearing that supports the camshaft is integrally connected to the holder, so that the blade block can be moved up and down with respect to the rotation axis of the motor, that is, the case side. Attempts are being made to do so.

By supporting the blade block so that it can move up and down, when the fixed blade is pressed against the skin surface, the blade block is elastically lowered against the pressing force and the fixed blade is pressed against the skin surface. This is to reduce the impact on the body.

When attempting to realize a so-called floating structure in which the blade block can move up and down relative to the case as described above, it is necessary to take measures to determine the stroke length of the up and down movement of the blade block, and in that case It is required that the vertical movement of the blade block can be performed as stably as possible, and that assembly and manufacturing are easy.

This idea connects the bearing stand that supports the camshaft and the blade block side in a separable manner, and loosely fits the horizontal projecting wall part formed on the case into the groove formed in this joint part. With a simple structure in which the loose fit gap length in the direction is the stroke length in the vertical direction of the blade block, the blade block can be stably moved up and down, and the reciprocating motion can be made to facilitate assembly and production. Electricity aims to provide razors.

An embodiment of this invention will be described below with reference to the drawings.

The reciprocating electric razor of this embodiment has a structure that can be separated into a head part and a main body part. In Figures 1 and 2, only the head part related to this invention is shown, and the battery, motor, etc. The main body portion that accommodates the is not shown.

In the same figure, 1 is a helad case, 2 is a head case 1
This is a blade block placed at the top end of the blade.

Reference numeral 3 denotes a blade holder, and a fixed blade 5 is mounted between the left and right engagement arm pieces 4, which are formed upright on both the left and right ends of the blade holder 3.
It is held firmly.

Reference numerals 6 and 7 denote a movable blade for finishing and a movable blade for rough shaving that come into sliding contact with the inner surface of the fixed blade 5, and these movable blades 6° 7
A movable blade driver 8 is interposed between them.

Pins 9°9 erected at both left and right ends of this movable blade driver 8
The movable blade 6 for rough shaving is engaged with the movable blade 6 for rough shaving, and the boss portions 10, 10 formed on the lower surface of both left and right ends of the drive element 8 engage the engagement holes II, 11 of the movable blade 7 for rough shaving. As a result, the movable blades 6 and 7 are reciprocated in the left-right direction (in the direction of arrow a) with respect to the fixed blade 5, integrally with the movable blade driver B.

Reference numeral 12 and 13 denote pressure springs installed on the blade holder 3, which bring the two rotary blades 6 and 7 into elastic contact with the inner surface of the fixed blade 5.

The holder 3, the fixed blade 5, the two rotating blades 6 and 7, etc. constitute a blade block 2.

14 is an eccentric cam that is fitted into a cam receiving portion 15 formed at the lower center of the movable blade driver 8; 16 is this eccentric cam 14;
The camshaft 16 is supported by a bearing 1B buried in the center of a bearing stand 17.

A locking piece 19 is fixed to the lower end of the camshaft 16, and this locking piece 19 is movable up and down via a spring member 22 on a drive shaft body 21 fixed to a motor rotating shaft 20 shown in FIG. It is removably locked to the coupled coupling member 23.

Thereby, the camshaft 16 is set to rotate together with the rotating shaft 20 of the motor and to be freely movable.

Reference numeral 24 denotes a blade block holder that holds the blade block 2 and guides the vertical movement of the blade block 2 relative to the head case 1. They are separably coupled at 71.

That is, both falling portions 26.26 of the locking spring 25 are connected to the through holes 2B and 2 formed in the plate-like base portion 27 of the holder 24.
8, and by locking the engagement holes 29, 29 formed in each falling portion 26, 26 with the engagement protrusions 30, 30 fixed to the bearing stand 17, the bearing stand 17.

Reference numerals 31 and 31 denote dogleg-shaped engaging portions that are bent in opposing directions at both ends of the locking spring 25;
．． 31 is locked to locking protrusions 30 and 30 formed on both left and right sides of the lower part of the blade holder 3, and the blade block 2 is held detachably on the holder 24.

Reference numeral 32.32 denotes an upstanding wall portion that constitutes a part of the holding body 24, and as shown in FIG. The compatible wall portion 32.3 is slidably fitted therebetween to guide the vertical movement of the blade block 2.
A groove 35 into which a guide protrusion 34 formed on the side of the holder 3 is fitted is formed on each opposing surface of the blade block 2, and by fitting these two parts 34 and 35, the vibration direction of the blade block 2 is adjusted. This prevents lateral vibration and provides guidance during attachment/detachment operations.

36 is a horizontal projecting wall portion formed on the inner wall of the case 1 with a rectangular hole 37, and 3B is a concave groove formed in the connecting portion S of the blade block holder 24 and the bearing stand 17.

The groove width T1 of the concave groove 38 is made wider than the medium thickness T2 of the horizontal protruding wall portion 36, so that the horizontal protruding wall portion 36 is loosely fitted therein.

That is, while inserting the blade block holder 24 together with the blade block 2 from the upper side of the head case 1,
If the bearing stand 17 is inserted from the lower side of the case 1 and the rectangular hole 37 of the horizontal projecting wall section 36 is used to combine both 24 and 17 with the locking spring 25, the horizontal projecting wall section 3
6, the blade block 2 side and the bearing stand 17 are moved up and down with respect to the head case 1.

The free fitting gap in the vertical direction between the four-striped groove 3B and the horizontal projecting wall portion 36, that is, the difference T between the groove width T1 of the concave groove 38 and the medium thickness T2 of the horizontal wall portion 36, is determined by the vertical movement of the blade block 2. This is set as the stroke length.

Reference numeral 39 denotes a bridge piece formed on the blade block holder 24, which is engaged with a step 40 formed on the inner wall of the head case 1 to prevent the blade block 2 from wobbling when it moves up and down.

In the above configuration, when the fixed blade 5 is not pressed against the skin surface, the lower inner surface 3 of the groove 38 as shown in FIG.
8a receives the spring force of the spring member 22 and comes into contact with the lower surface 36a of the horizontal protruding wall portion 36, whereby the upper limit position of the blade block 2 is determined, and the fixed blade 5 is brought into contact with the skin. When pressed against the surface, the blade block 2 side descends together with the bearing stand 17 as shown in FIG.
The upper inner surface 38b is the upper surface 36b of the horizontal projecting wall portion 36.
The lower limit position of the blade block 2 is determined by this contact.

Here, the horizontal protruding wall portion 36 of the head case 1 is inserted into the concave groove 3B formed in the connecting portion S between the blade block 2 side and the bearing stand 17.
With a simple structure that allows the blade block 2 to be loosely fitted, the stroke I and loaf length T of the vertical movement of the blade block 2 can be set, the upper and lower limit positions of the vertical movement can be determined, and the blade block 2 side and bearing can be set. Since the pedestal 17 is separable, the blade block 2 side and the bearing pedestal 17 can be easily combined with the protrusion wall 36 as a boundary, and the assembly is also simple, especially the blade block 2 side and the bearing pedestal. Since the upper and lower limit positions of the vertical movement of the blade block 2 are regulated at the intermediate position from the joint S with the blade block 17, the weight balance during the vertical movement of the blade block 2 is good, and the vertical movement can be performed smoothly. .

In the above embodiment, in order to simplify assembly, both the blade holder 3 and the blade block holder 24, which constitute the blade block 2 side, are configured to be detachable, but this holder 24 is integrated with the holder 3. Alternatively, the horizontal projecting wall portion 36 may have a shape that partially fits loosely into the groove 38.

Further, in the above embodiment, the blade holder 3 and the blade block holder 24 are connected by the locking bolt 25, but by engaging an engaging protrusion projecting integrally from one of the two into the recess of the other. They may be connected, or ordinary screws may be used. In either case, various means can be used as long as the two can be connected removably.

As described above, this invention connects the blade block 2 side, which is supported vertically movably with respect to the case, and the bearing stand in a separable manner, and the upper blade is loosely fitted into the groove formed in this joint. It is possible to provide a reciprocating electric shaver that has a simple structure and is easy to assemble, and in which the vertical movement of the blade block is stable, by forming a horizontal projecting wall part in the case to determine the upper and lower limit positions of the vertical movement of the block. can.

[Brief explanation of drawings]

Fig. 1 is a cutaway front view showing the head of the reciprocating electric shaver according to this invention, Fig. 2 is a cutaway side view showing the head, Fig. 3 is an exploded perspective view, Figs. 4 and 5. is an explanatory diagram of the operation of the same main part. 1... Case, 2... Blade block, 3
...Blade holder, 5...Fixed blade, 6,
7...Movable blade, 14...Eccentric cam, 1
6...Camshaft, 17...Bearing stand, 36
...Horizontal projecting wall part, 3B... Concave groove, S
・・・・・・Connecting part.

Claims (1)

[Scope of utility model registration request] The blade block 2 side, which holds the fixed blade 5 and the movable blades 6 and 7 in the blade holder 3, and the eccentric cam 14 for reciprocating the movable blade
A bearing stand 17 that supports the camshaft 16 is separably connected, and both 2 and 17 are supported vertically movably with respect to the case 1, and a joint part between the blade block 2 side and the bearing stand 17 side is formed. A groove 38 is formed on the outer circumference of the case 1, and a horizontal projecting wall 36 is loosely fitted into the groove 3B to determine the upper and lower limit positions of the vertical movement of the blade block 2.
A reciprocating electric razor formed on the inner wall of.