JPS5926953Y2 - reciprocating electric razor - Google Patents

Description

[Detailed description of the invention] This invention relates to a vibration prevention structure for a reciprocating electric shaver.

Conventionally, in this type of electric shaver, vibrations in the direction of the reciprocating motion of the inner cutter body are transmitted to the hand through the main body case, causing discomfort to the user. It has been proposed that a balancer having a weight equivalent to the weight of the inner cutter body is attached to the rotating shaft.

By the way, the inner blade body is connected to a driver which reciprocates by an eccentric cam via a rod protruding from the driver, and reciprocates together with the driver.
In reality, vibrations in the reciprocating direction are generated on the main body case side based on the total weight of the inner blade, driver, and rod.

However, in the above-mentioned conventional configuration, the focus is only on vibration prevention by the inner blade, so it does not suppress the vibration caused by the reciprocating motion of the single movable block of the driver and the inner blade. Even if the weight of the balancer is set to be equal to the weight of the movable block, the balancer effect is only weak because the balancer acts at a position below the motor's rotation axis, that is, the driver element in the vertical direction. However, due to the rotational movement of the balancer itself, a component in a direction perpendicular to the reciprocating direction of the inner blade acts as a new source of vibration, making it rather difficult to use.

Therefore, in this invention, there is a connection between the drive element, which reciprocates linearly in response to the rotational force of the eccentric cam, and the inner blade body, which is integrated with the drive element via a rod protruding from the drive element. By disposing a balancer having a weight almost equal to the weight of the movable block consisting of the drive element, inner blade body, and rod body, and configuring this balancer to move in the opposite direction to the movable block, the reciprocation of the movable block is achieved. To provide a reciprocating electric shaver that can effectively suppress the generation of vibrations caused by motion, and is easy to handle without generating new vibrations in a direction orthogonal to the reciprocating direction.

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

In Figures 1 and 2, 1 is a main body case, 2 is a motor housed in the main body case 1, and the motor 2 is connected to a partition wall 3 fixed in the case 1 with screws 4, 4, etc. An eccentric cam 6 is fixed to the rotating shaft 5.

? , 7 are pivots projecting from the inner wall of the main body case 1 at a predetermined distance in the left-right direction, and the pivots 7, 7 are also projecting from the opposing inner walls at the same level positions.

Reference numeral 8 denotes a lever having a shaft hole 9 that is fitted into the pivot shaft 7, and the lever 8 is pivotally supported on each pivot shaft 7, respectively.

10 is a pin hole formed at the lower end of each lever 8;
1 is a plate-shaped driver disposed above the motor 2;
A pin 12 that fits into the pin hole 10 is formed on both the front and rear sides of the driver 11. By fitting both 10 and 12, the driver 11 can be moved in the left and right direction by the lever 8. It is suspended so that it can vibrate freely in the directions of arrows a and b.

13 is a cam receiving hole formed on the lower surface of the driver 11;
The eccentric cam 6 is fitted into the receiving hole 13, and the driving element 11 is reciprocated in the left-right direction by the rotational force of the eccentric cam 60.

Reference numeral 14 denotes an inner cutter body consisting of an inner cutter blade group 15 and a holder 16 holding the inner cutter blade group 15, and this inner cutter body 14 is connected to the tip of a rod 1T protruding from the driver 11. These drive elements 11°, inner blade body 14 and rod body 1
T constitutes a movable block 18.

19 is an outer blade holder fitted to the top of the main body case 1;
The inner cutter blade group 15 of the inner cutter body 14 is set to come into sliding contact with the inner surface of the outer cutter 20 stretched on the outer cutter holder 19.

Reference numeral 21 denotes a plate-shaped balancer having a weight almost equal to the weight of the movable block 18 and disposed between the inner blade body 14 and the driver 11. A pin hole 22 formed at the upper end of each lever 8
A pin 23 is formed to fit into the movable block 18, and is connected to the driver 11 via the lever 8, and is configured to move in the opposite direction to the reciprocating movement of the movable block 18.

In this case, from the pivot 7 of the lever 8 to the pin holes 10 and 23
It is preferable to set the lengths to be the same.

If the pin hole 22 is a long hole and the balancer 21 is configured to slide on a horizontal support wall surface, the balancer 21 can be kept in a horizontal state and reciprocated.

In addition, 24 is a coil spring for pushing up the inner blade body 16;
5 is a rod insertion hole formed in the balancer 21, 26 is a hair debris intrusion prevention member attached to the inner wall of the rod insertion hole 27 formed in the main body case 1, and 28 is a locking member for the outer blade holder 19. .

In the above configuration, when the eccentric cam 6 is rotated by the motor 2, the driver 11 moves linearly in the directions of arrows a and b, so the inner blade 14 connected to the driver 11 via the rod 17 also moves in the same direction. Move back and forth.

Due to the linear movement of the driver 11, the balancer 21 reciprocates in the opposite direction via the lever 8 as shown in FIG.

That is, since the balancer 21 has the same weight as the movable block 18 consisting of the inner cutter body 14, driver 11, etc., the vibration to the main body case 1 due to the reciprocating movement of the movable block 18 is caused by the vibration of the balancer 21 in the opposite direction. Cancelled by exercise.

In particular, since the balancer 21 is disposed between the inner cutter body 14 and the drive element 11, the balancer 21 is placed at an intermediate position in the vertical direction between the center of gravity of the inner cutter body 14 and the center of gravity of the drive element 110.
10 center of gravity is located, and the movable block 18
The balancer effect can be effectively exerted, and furthermore, the balancer 21 does not generate new vibrations due to the motion component in the direction orthogonal to the reciprocating direction, so the user can handle it without feeling uncomfortable. I can do it.

In the above embodiment, the lever 8 is configured separately from the driver 11, but as shown in FIG.
may be formed integrally with the driver 11 and balancer 21 via hinge parts 41 and 42.

Further, in the above embodiment, the balancer 21 is connected to the driver 131 via the lever 8;
1, the movable block 18 side, for example, the inner blade body 14
May be connected to

As described above, this invention provides a balancer with the same weight as the movable block, which is formed by connecting an inner blade body to a drive element driven by an eccentric cam via a rod, between the inner blade body and the drive element. Vibrations generated in the main body case are effectively suppressed by interlocking the balancer in the opposite direction to the reciprocating motion of the movable block via a lever provided and pivotally supported on the main body case side. Therefore, it is possible to provide a reciprocating electric shaver with good operability without the occurrence of vibration in a direction perpendicular to the reciprocating direction of the inner cutter body.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an example of the reciprocating electric shaver according to this invention, Fig. 2 is an exploded perspective view of the same, Fig. 3 is an explanatory diagram of the operation of the main part, and Fig. 4 is a modification of the main part. FIG. 1...Body case, 6...Eccentric cam,
7... Pivot, 8... Lever 1... Driver, 14... Inner blade, 18... Movable block, 21. ...Balancer.

Claims (1)

[Scope of utility model registration request] Drive element 1 that reciprocates linearly in response to rotational force of eccentric cam 60
1, a movable block 18 connected to the inner blade body 14 via a rod 17 protruding from the upper surface of the driver 11; A balancer 21 disposed between the inner blade body 14 and the inner blade body 14 is pivotably supported on the main body case 1 side, and the balancer 21 is interlocked in the opposite direction with respect to the reciprocating movement of the movable block 18. A reciprocating electric shaver equipped with a lever 8.