JPS5910234B2 - Blade drive mechanism of dry razor machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a blade drive mechanism, which stabilizes movement by reducing drive noise and vibration, reduces current consumption, increases durability, simplifies the mechanism, This is a blade drive mechanism for a dry razor machine designed for ease of assembly.

Ideally, the drive mechanism should have no looseness in the connecting parts and no excessive force such as twisting is applied to the transmission lever or drive plate, and should have a small number of connecting parts and no dimensional restrictions.

Conventionally, as an example of the interlocking part of this type of razor machine, an eccentric part is provided in the motor joint, and a drive plate is engaged with the eccentric joint to convert rotational motion into reciprocating motion.

At that time, the conversion part makes a large noise and changes over time because the eccentric joint consisting of a drive plate with an elliptical part and a cylindrical part hits impact inside the ellipse, that is, engages with points and lines and moves. In contrast, not only was the amount of wear large and the lifespan short, but the dimensions of the ellipse during manufacturing were large and there was a lot of backlash.

The vibration caused by the backlash is large and reduces the feeling of shaving when shaving.

Therefore, the current consumption is high and the battery life is short.

Even during assembly, cumbersome processes such as caulking and fusing were required to attach the drive plate and the grooved board.

The mechanism itself had a complicated structure.

Further, in manufacturing, high dimensional accuracy of the retaining portion is required, which is also a cause of high cost.

The present invention eliminates the above-mentioned drawbacks by disposing a cylinder and a hole into which the cylinder fits, that is, a shaft and a shaft hole in an engaging part, so that the force applied during driving is transferred to the outer circumference of the shaft. The transmission lever is reciprocated by an eccentric joint on the rotating shaft that drives the first blade, and one end of the transmission lever is pivotally supported by the other. the second end
This is a blade drive mechanism in which the blade and the engaged drive plate are rotated and connected in pairs.

An embodiment of the present invention will be described in more detail based on the drawings.

Moreover, one case shows the drive of the scraping blade.

First, to describe the structure, an inner cutter joint 4 having an eccentric portion 3 is fixed to a rotating shaft 2 of a motor 1, and an inner cutter support 6 having an inner cutter 5 is fitted into the inner cutter joint 4. Ru.

The outer cutter 7 that is in sliding contact with the inner cutter 5 is locked to an outer frame 8, and the outer frame 8 is screwed to an outer frame base plate 10 that is locked to the motor 1 with a motor set screw 9.

A scraping blade drive mechanism is installed between the outer frame substrate 10 and the motor 1.

The scratched board 11 is locked by the motor set screw 9.

The crease base plate 11 has a shape as shown in FIG. 4, and is provided with a crease base plate top plate 12, a movable blade guide pin 13 is integrally protruded, a fixed blade 14 is fixed, and the movable blade guide pin 1
The movable blade 15 that engages with the blade 3 is pressed against the fixed blade 14 by a sharpening blade spring 16.

The transmission lever 17 is connected to the eccentric portion 3 of the inner blade joint 4 described above.
The drive plate 18 is arranged using a rotating pair, and is interlocked with the drive plate 18 by the rotating pair.

A circular hole is provided at one end of the drive plate 18, and the click spring 1
At 9, a shaft 22 (cylindrical shaft) is provided on a crease changeover plate 21 which has a click property and is engaged with a crease changeover switch 20.

The other end having the scratch engagement part 23 is cylindrical and the movable blade 1
It engages with the drive plate engaging portion 24 of No. 5.

The central portion 25 of the drive plate 18 is curved in the height direction as shown in FIG. 2, and is provided with an escape from the transmission lever 17 to enable switching.

The engagement portion 24 of the movable blade 15 described above is provided with a slope 26 so that the engagement portion 23 of the drive plate can be easily engaged and disengaged.

Next, the operation related to driving will be described.

FIG. 1 shows the movable blade 15 sliding in pressure contact with the fixed blade 14 to drive the scraping blade, and the scraping changeover switch 20
is located on the ON side, and the crease changeover plate 21, which is interlocked with the crease changeover switch 20, also moves to the ON side.

At this time, the click spring 19 is connected to the crease switching plate 21 so that a click is activated during the ON-OFF switching operation.

The drive plate 18 is centered at the point where it is pivotally connected to the shaft 22 disposed on the cutter switching plate, and the connection point 27 with the transmission lever 17 is vibrated by an amount twice the eccentricity of the eccentric portion 3 of the inner cutter joint 4. Ru.

The vibration part of the engagement part 28 of the eccentric part 3 and the transmission lever 17 is an engagement between a circular hole and a cylinder, that is, sliding contact on all surfaces, and the inner blade joint 40
It is engaged in a rotating pair with respect to rotation.

Further, the drive plate 18, the transmission lever 17, and the connection point 27 also use a rotating pair formed by a circular hole and a cylinder in a mating relationship.

The crease engaging portion 23 that is engaged with the movable blade 15 at the other end of the drive plate 1B is engaged with the drive plate retaining portion 24 of the movable blade 15, and is disposed in line with the crease engaging portion 23. The movable blade guide pin 13 guides and positions the blade in the front and rear direction, and
It reciprocates around a shaft 22 on the crease switching plate.

Movable blade 1 engaged with groove engagement portion 23 of drive plate 18
5 is (the eccentricity of the eccentric joint X22.23/22.
It is reciprocated according to the relational expression 27).

The above relational expression is a relation based on the lever ratio in the drive plate 18, and by changing the point 27, the amount of reciprocation of the movable plate 15 can be regulated.

Since the cutting blade spring 16 is disposed to swing relative to the reciprocation of the movable blade 15 described above, the movable blade 15 is constantly pressed against the fixed blade 14 while applying force to the left and right.

In order to keep the scraping blade stationary, it is sufficient to move the scraping switch plate 21 having a click, which is moved by operating the scraping switch 20.

At that time, the drive lever 18 is also moved, and the groove engagement portion 2
3 is moved toward and away from the drive plate holding portion 24, and the vibration of the movable blade 15 stops.

At this time, the transmission lever 17 is moved to the position indicated by the broken line in FIG. 1, and is driven together with the drive plate 18 even if the scraping blade is stationary.

When the scraping blade is driven from a stationary state, the scraping engagement portion 23 of the driving plate 18 is moved along the slope of the slope 26 provided on the moving blade 15 to engage the driving plate by operating the scraping changeover switch 20. The movable blade 15 is engaged with the portion 24 and vibrates.

To briefly describe Fig. 2, a motor with an inner blade joint and a cutting board 1 with a built-in cutting blade mechanism.
1. Three blocks of an outer frame substrate 10 to which inner and outer cutters are attached are fixed with two motor set screws 9.

In this embodiment, the eccentric joint and the transmission lever, the transmission lever and the drive plate, and one end of the drive plate and the shaft on the groove switching plate are rotated and engaged by a pairwise relationship, that is, a cylinder and a circular hole (shaft and shaft hole). Therefore, the stress is dispersed on the surface, and when oil is applied, an oil film is interposed on the engagement surface, which reduces the friction coefficient and creates smooth and stable movement, resulting in very low current consumption and no scratches. The current consumption when the changeover switch is OFF, that is, only the drive plate is reciprocating, is 15
mA, which was conventionally 40 mA.

In addition, when the sharpening switch is ON, that is, when the sharpening blade is driven, the current is 100 mA, whereas the conventional one is 250 mA.
There was mA.

As can be seen from the above numerical values, when a load is applied to the drive plate, each engagement point of the present invention rotates and is paired, so there is no impact and there is no inertia due to backlash.

In this embodiment, an inner cutter and an outer cutter are disposed in a first blade portion on a rotating shaft, and a movable scraping blade is engaged with a drive plate in a second blade portion.

As described above, the effect of the present invention is that by using rotating pairs as respective engagement points, the load of reciprocating the movable blade is received on the outer circumferential surface of the cylinder, that is, the contact surface. Stress is dispersed, contact pressure ([/m) is reduced, and motion at high speed rotation becomes smooth and stable.

Furthermore, since the contact pressure (.p/m4) is small, the wear coefficient is small and durability can be increased.

Since no impact force or the like acts on the retaining portion, the current consumption is low, the battery life is long, it is economical, and it does not cause rattling due to aging.

Furthermore, even if there is play in the retaining portion, the relationship between the shaft and the shaft hole allows the outer periphery of the shaft to move while constantly in contact with the inner periphery of the shaft hole, so no noise or vibration is generated due to impact.

In terms of manufacturing, the cylinder and circular hole make it much easier to achieve dimensional accuracy compared to an ellipse, and minimize looseness.

As in the actual case, the effect will be greater if the eccentric joint and the transmission lever are rotated and engaged in pairs, and oil is applied to each engagement point.

Because the rotation shaft/transmission lever and the drive plate are connected in parallel, the transmission lever and each engagement point are not subject to excessive force such as twisting, allowing stable movement at all times, which is one of the reasons for increased durability. There is also.

Since there is only one connection point and the mechanism is simple, it is easy to manufacture and there are no other restrictions on the mechanism.

As for switching, only the drive plate needs to be moved, so it can be smoothly switched with a small force and a small amount of movement, so the space required to deliver the mechanism is small.

Since it is constructed using rotating pairs, there is no requirement for high dimensional accuracy and it can be done at low cost.

Regarding assembly, since all the functions of the drive mechanism are arranged on the board in a flat manner, it is block-like and not only can be easily assembled, but also performance checks such as current adjustment can be easily performed in the assembled state.

In addition, by providing the first blade portion on the rotating shaft and the second blade portion on the drive plate, the eccentricity that drives the second blade portion on the joint that the first blade portion disposed on the rotating shaft engages with. It is only necessary to arrange the joints, the number of parts is small, and the structure is constructed without an unreasonable drive change mechanism.

The above-mentioned unreasonable drive change mechanism refers to an unbalance in the direction of force, and the present invention has a rotating first blade section on a rotating shaft, and a reciprocating blade is engaged with a reciprocating drive plate. It is a practical razor machine that does not have an unreasonable drive change part, has two types of blades, a shaving blade and a longitudinal cutting blade, and consumes less current like the above-mentioned mechanism.

As shown above, the link mechanism according to the present invention has been developed 17,
Moreover, by applying the invention, an excellent razor machine is presented.

[Brief explanation of drawings]

FIG. 1 is a main plan view of the crease driving section, illustrating the crease drive. Further, the broken line portion of the transmission lever 17 indicates the position when the transmission lever 17 is at rest. Figure 2 is a B-B vertical cross-sectional view of the main part, and shows the inner cutter and
Shows the outer blade installed. FIG. 3 is a sectional view taken along line AA in FIG. 1, and FIG. 4 is a perspective view of the scratched board, showing its approximate shape. 1...Motor, 2...Motor rotating shaft, 3...Eccentric part of inner blade joint, 4...
...Inner blade joint, 5...Inner blade, 6...
...Inner blade support, 7...Outer blade, 8...
・Outer frame, 9...Motor set screw, 10...
...Outer frame board, 11...Killed board, 12
・・・・・・Top plate of Kiwazori board, 13...Movable blade guide pin (arranged on the top plate of Kiwazori board), 14...
...Fixed blade, 15...Movable blade, 16...
... Kizori blade spring, 17... Transmission lever,
18... Drive plate, 19... Click spring, 20... Scratch changeover switch, 21...
...Screen switching plate, 22...Shaft on the crease switching plate, 23...Screen retaining part (disposed on the drive plate), 24...Drive plate Retaining part (disposed on the movable blade), 25...Curved part at the center of the drive plate, 26...
... Slope of drive plate holding part (arranged on movable blade), 27.
...Connection point between drive plate and transmission lever, 28...
...A retaining part between the eccentric part and the transmission lever.

Claims (1)

[Claims] 1. A first blade part is disposed on a rotating shaft having an eccentric part, a transmission lever is reciprocated by the eccentric part, and the transmission lever is coupled to a drive plate in rotation, and one end of the drive plate is connected to the drive plate. A blade drive mechanism for a dry razor machine, characterized in that it is pivotably supported and the other end is engaged with a second blade part.