JPS5841905Y2 - electric razor - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a type of electric razor that has shearing parts on both sides and moves movable blades back and forth.

As a device having a shearing section on both sides, there is one in which an eyebrow shearing section is formed on one side and a shearing section for shaving other unnecessary hair is formed on the other side.

The eyebrow shearing section is generally narrow because its main purpose is to adjust the shape of the eyebrows rather than shaving them.

Therefore, the fixed blade and the movable blade are wide on one side and narrow on the other side.

Accordingly, it is natural to use a total of three springs for pressing the movable blade against the fixed blade, one in the center of one narrow side and one on each side of the other wide side.

On the other hand, in order to slide the movable body, it is necessary to install a cam at the upper end of the connecting shaft connected to the motor to convert rotational motion into linear motion, and to install a movable body that engages with this cam in the center of the movable blade. .

In this case, the springs installed on both sides of the wide side of the movable blade will not interfere with the movable body, but the springs located on the narrow side must necessarily be located in the center, so they will not interfere with the movable body. It must be separated from the movable body to prevent interference.

In other words, the narrow shearing section is further away from the movable body by that amount.

This causes the problem of increasing the size of the blade, and the resistance to which the cam is subjected increases, resulting in the problem that the reciprocating motion of the movable blade lacks smoothness.

The purpose of this invention is to develop an electric shaver that can overcome the above-mentioned drawbacks.

An embodiment of this invention will be explained based on the drawings.

Reference numeral 1 denotes a main body case that houses the motor 2.

A housing 3 is detachably provided on the upper part of the main body case 1.

This housing 3 includes a case-like holder 4 and this holder 4
It consists of an irregularly shaped cylindrical part 5 which is screwed onto the cylindrical part 5.

The irregularly shaped cylindrical part 5 has a circular lower end, a trapezoidal upper end with a narrow width on one side and a wide width on the other side, and a natural curve connecting the two sides.

A fixed blade holder 7 for holding a fixed blade 6 is detachably attached to the upper part of the housing 3 at an angle with respect to the axis of the main body case 1.

The housing 3 is provided with a movable blade 8 that faces the fixed blade 6.

A narrow comb-shaped blade 9 is formed on one side of the fixed blade 6 and the movable blade 8, and a wide comb-shaped blade 10 is formed on the other side.
is formed.

As a result, a narrow shearing section 11 for wear and a wide shearing section 12 for shaving other waste hair are formed.

Three springs 13 are provided that press the movable blade 8 against the fixed blade 6 from below.

These springs 13 have a conical shape with a winding diameter decreasing toward the top.

Two of the springs 13 are connected to the housing 3.
One of the springs 13 is held by a spring seat 15 having ribs 14 arranged in a cross shape on both sides of the upper wide side of the housing 3 to press both sides of the movable blade 8 on the blade 10 side. Spring seat 1 is removably placed on the upper narrow side of the
6 and presses the center of the movable blade 8 on the blade 9 side.

A knob 17.18 is formed on the spring seat 15.16 to stabilize the seat of the spring 13.

Next, a bearing 19 is inserted into the irregularly shaped cylindrical portion 5 of the housing 3, and a connecting shaft 20 is supported on this bearing 19.

A cam 21 is fixedly provided at the upper end of this connecting shaft 20, and a coupling 23 connected to a motor shaft 22 at the lower end.
A coupling 24 that is removably connected to the housing is fitted and fixed.

A movable body 25 that engages with the cam 21 is attached to the center of the movable blade 8.

That is, the movable blade 8 has a locking hole 26 formed therein.

Legs 27 are formed on both sides of the movable body 25, and grooves 2 that engage with the edges of the locking hole 26 are formed on both sides of the legs 27.
8 is formed.

Therefore, one side of the leg 27 on the narrow shearing part 11 side is inclined toward the center B of the movable body 25 rather than one side A of the movable body 25, and thereby the spring seat 16 and the spring 1
A space 29 is formed to allow the 3 to escape.

In such a configuration, when the motor 2 is driven, the connecting shaft 20 rotates, and the cam 21 reciprocates the movable body 25 together with the movable blade 8 while converting rotational motion into linear motion.

As a result, shearing is performed by one of the shearing sections 11.12.

At this time, since the movable body 25 slides between the springs 13 on one side, it does not interfere with the movable body 25 even if the spring 25 is moved toward the center B side.

Further, the spring seat 16 and the spring 13 held therein are located in the center of the movable blade 8 on the blade 9 side, but are located in the space 29 and do not interfere with the movable body 25.

Thereby, the distance from the center B to the spring 13 and spring seat 16 and the distance to the tip of the blade 9 can be shortened, and thereby the fixed blade 6, the movable blade 8, and the housing 3 can be downsized. At the same time, the resistance that the cam 21 receives during shearing is small, and the sliding movement of the movable blade 8 and the rotational movement of the connecting shaft 20 can be made smooth.

Since this device is constructed as described above, a spring that is located on the narrow shearing section side and presses the movable blade against the fixed blade, and a spring seat that holds the spring are formed between the movable blade and the movable body. By positioning the spring holder and spring in the space, there is no interference between the movable body and the spring holder and spring even if the spring holder and spring are brought to the center of the movable body. This allows the movable blade, fixed blade, and housing to be made smaller.
Furthermore, the load applied to the cam is reduced, and the movable blade and the connecting shaft can operate smoothly.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, in which Fig. 1 is a vertical side view, Fig. 2 is an exploded perspective view, Fig. 3 is a longitudinal side view showing the state of connection between the movable blade and the movable body, and Fig. 4 The figure is its front view. 1...Body case, 2...Motor, 3
...Housing, 6...Fixed blade, 8.
...Movable blade, 11...Narrow shearing part, 12
...Wide shearing section, 13...Spring, 15
~16... Spring seat, 20... Connection shaft,
21...cam, 25...movable body, 27
... Legs, 29 ... Space section.

Claims (1)

[Scope of utility model registration request] A housing whose upper surface is inclined with respect to the axis of the main body case is provided on the upper part of the main body case that houses the motor, and this housing has a narrow sheared part on one side of the upper side and a narrow sheared part on the other side of the lower side. A fixed blade and a movable blade are provided for forming a wide shearing section, and a spring seat for holding a spring that presses the movable blade from below and presses against the fixed blade is placed in the center of the narrow shearing section side. A movable body is formed in the housing and is located on both sides of the wide shearing section, and reciprocates by locking with a cam provided at the upper end of a connecting shaft connected to the motor. A space is formed on the narrow shearing section side by tilting a leg provided in the movable body that engages with the movable blade toward the wide shearing section, and a space on the narrow shearing section side is formed in this space. An electric shaver characterized in that the spring and the spring seat are arranged.