JPS597908Y2 - electric razor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electric shaver in which a trimmer blade enters and exits through a gate with a door provided in the main body housing.

With this product, when inserting and removing the trimmer blade,
The gate door must be opened and closed, and the opening/closing mechanism for this is shown in Japanese Utility Model Publication No. 48-24693, in which the door is pivotally attached to the opening edge of the gate and is biased by a spring. Mechanically, the simplest method is to always bias the door in the closing direction, and when the trimmer blade is taken out, the block of the trimmer blade pushes the door open.

However, in this case, when the trimmer blade is taken out, the door also protrudes in the same direction, so the protrusion dimension of the trimmer blade must be made large, otherwise the door will get in the way and it will be difficult to perform edging with the trimmer blade. In the case where the door is pivoted to the lower edge of the gate as shown in the above publication, the hair particles accumulated on the door enter the main body when the door is closed.
This may cause a malfunction of the trimmer blade insertion/removal mechanism, etc., and since the trimmer blade block is in contact with the door, there is a risk of noise being generated at the contact area when the trimmer blade is driven. .

To eliminate this problem, the gate should be opened and closed like a sliding door, so that when the handle is operated, the gate door opens first and then the trimmer blade comes out.
One idea would be to have the door close after the trimmer blade is retracted.

In this case, if it is possible to operate the trimmer blade in and out and the door to open and close the gate with one handle, an interlocking mechanism including an intermittent gear is used between the handle, the trimmer blade, and the door. The blades should move sequentially.

By doing so, the problems of the prior art described above can be solved, but new problems arise due to the use of intermittent gears.

This is a deviation in the meshing start position of the member that meshes with the intermittent gear to move the door and the trimmer blade, respectively, that is, a deviation in the meshing timing.

When this misalignment occurs, the opening and closing of the gate by the door and the insertion and removal of the trimmer blade cannot be performed in a smooth sequential manner, and sometimes the trimmer blade becomes stuck midway due to insufficient engagement of the meshing portions.

Such misalignment is caused by looseness caused by low component precision and assembly precision between the intermittent gear and the parts that mesh with it, and can be eliminated by increasing the precision mentioned above, but this would be extremely costly. It gets expensive.

The present invention has been developed in view of these points, and its purpose is to simplify the sequential operation of the door operation plate and trimmer operation plate, which are driven by intermittent gears from the rotation of the operation plate. Our aim is to provide an electric shaver that operates smoothly and stably with a structure that does not increase costs. There is a razor on offer.

The present invention will be described in detail below based on illustrated embodiments.

In the figure, 1 is a main body housing, 3 is an outer cutter frame equipped with an outer cutter 2, and 5 is a bottom cover. and an upper housing 11 in which mechanical parts such as the trimmer block 6 are housed.

The bottom cover 5 includes a battery holder portion 39 and is engaged with the lower end opening of the lower housing 12 , and a motor base 38 is fixed within the lower housing 12 .

The lower part of the motor is fixed to the motor base 38, and the upper part is housed in a lower cylindrical part that is housed in the lower housing 12 of the upper housing 11.

A ring-shaped handle 10 is rotatably attached to the center of the upper housing 11.

The upper part of the upper housing 11 has a cup shape that opens upward, and the blade mount 4 is disposed at the upper end of the cup.

The blade mount 4 and the upper housing 11 are fixed to the lower housing 12 by screws 37 that pass through them and are screwed onto the motor base 38.

An outer cutter frame 3 is screwed onto the upper surface of the blade mount 4, and a rotary blade (not shown) that slides into contact with the outer cutter 2 is disposed in the internal space between the blade mount 4 and the outer cutter frame 3. Ru.

A boss 36 protrudes upward from the center of a floor 35 provided in the upper housing 11, and a cylindrical base 41 at the lower end of the boss 36
The operation plate 14 is rotatably mounted around the axis.

The operation plate 14 has a switch spring 42 attached to its lower surface to open and close the switch as it rotates, and a retaining piece 43 that protrudes downward through the floor 35 is engaged with the handle 10 so that it can be moved together with the handle 10. Rotate.

This rotation range is regulated by the side edge of the operating plate 14 coming into contact with the peripheral wall of the hole 14 for the insertion of the screw 37.

A gear 25 is provided on one side of the operation plate 14, and a plurality of notches 26 are provided on the other side with the teeth facing the boss 36.
The gear 25 meshes with the lower gear 24 of the operating wheel 15, which is loosely fitted onto a shaft 45 that stands up from the floor 35.

46 is a ring for preventing the operation wheel 15 from coming off. Operation vehicle 15
further has an upper gear 22 and a middle gear 23, and the lower gear 24 has teeth around the entire circumference, but the upper gear 22 and the middle gear 23 are intermittent gears that are provided only about half the circumference, respectively. The door operating plate 16 driven by the upper gear 22 and the trimmer operating plate 18 driven by the middle gear 23 via the trimmer operating wheel 17 operate intermittently in response to the operation of the handle 10, respectively.

The trimmer operation wheel 17 is rotatably mounted on the boss 36,
The door operation plate 16 is rotatably fitted loosely into the trimmer operation wheel 17, and each rotates separately.

A cam groove 19 is cut into the upper surface of the trimmer operation plate 18 fixed to the upper end of the trimmer operation wheel 17, and one end of this cam groove 19 is located on the shaft side and curves toward the circumferential direction and is engaged. The groove portion 47 has the other end extending in an arc shape in the outer circumferential direction.

The door operation plate 16 has a protrusion 31 on the outer circumferential surface of the shaft portion, and an arcuate pressing spring portion 21 is integrally formed from the tip of the door engagement rod 20 extending toward the outer circumference. .

In the figure, 48 is a washer, 27 is a click spring, and this click spring 27, which is fixed by a pin 32 integrally projecting from the upper housing 11, has two spring pieces 28. 29, and a retaining protrusion 30 is formed at the tip of each spring piece 28,29.

The tip of one spring piece 28 is connected to a notch 26 provided in the operation plate 14.
The tip of the other spring piece 29 clicks into engagement with the protrusion 31 of the door operation plate 16.

Like the operation plate 14 and the door operation plate 16, which are made of plastic, this click spring 27 is also made of plastic.

A trimmer block 6 is further housed in the upper housing 11 in which these mechanical parts are arranged.

The trimmer block 6 is arranged on the lower surface of the blade mount 4, and is housed in the upper housing 11 while being pressed against the lower surface of the blade mount 4 by a trimmer holding plate 49 which is caulked and fixed to the blade mount 4. The trimmer holding plate 49 has a linear trimmer pin guide groove 50 formed rearward from the drive shaft insertion hole 51 in the center, and a trimmer pin 52 that protrudes downward from the lower surface of the rear end of the trimmer block 6 is connected to the trimmer. It protrudes downward from the pin guide groove 50.

Reference numeral 8 denotes a gate through which the trimmer blade 7 at the front end of the trimmer block 6 enters and exits, and is placed in the upper part of the upper housing 11 with its upper end open. It is opened and closed by a door 9 whose lower edge slides in a sliding groove 53.

As shown in FIG. 3, the door 9 has a horizontal lower edge, one longitudinal end engages with the door engaging rod 20 of the door operation plate 16, and the other longitudinal end is a push spring. 21 is pressed downward and outward by a presser projection 66 on the lower surface of the tip.

The upper edge of the door 9 is also guided by a guide groove 54 provided on the lower surface of the blade mount 4.

55 is a positioning notch provided on the upper edge of the upper housing 11, and a corresponding projection is provided on the lower surface of the blade mount 4.

Further, in the cup-shaped portion of the upper housing 11, pins 61 and 62 are integrally provided and protrude from the upper housing 11 from the hole edge of one of the insertion holes 44 and from the rear end thereof, respectively.

The pin 61 can freely come into contact with the door engaging rod 20, and the pin 61
2 can freely come into contact with the trimmer operation plate 18.

The trimmer block 6 has a trimmer blade 7 consisting of a fixed blade and a movable blade disposed at the front end of a trimmer base 56, and a ring-shaped drive whose side part is pivotally supported by a pin 57 on the rear annular part of the trimmer base 56. The front end of the rod 58 is connected to a movable blade, and its movement in the front-rear direction is guided by the blade mount 4.

The cylindrical shaft 59 that passes through the trimmer holding plate 49 and projects downward is fitted into the upper end recess of the insertion hole 44 of the upper housing 11, and the projection is engaged with the positioning notch 55, so that the shaft 59 is attached to the upper housing 11. When the blade mounting base 4 is installed and fixed with the screw 37 as described above, the trimmer pin 52 protruding from the trimmer block 6 will not only fit into the trimmer pin guide groove 50 of the trimmer holding plate 49 but also fit into the trimmer operation plate. 18, and as the trimmer operation plate 18 rotates, the portion of the cam groove 19 that overlaps with the trimmer pin guide groove 50 moves from the outer circumferential side to the center side.
Alternatively, it is displaced from the center side to the outer circumferential side.

This movement moves the trimmer block 6 in the front and back direction via the trimmer pin 52.

Next, the operation will be explained.

When the trimmer blade 7 is not in use and the power to the motor is turned off, the tip of one spring piece 28 of the click spring 27 is click-engaged with the notch 26 of the operation plate 14, and the other spring piece 29 G') Gendori (I to the -1 rule of Maya Mj +
M. The gamma cutter 8 is closed by the door 9, and the trimmer block 6 is housed inside.

This state is shown in FIGS. 7 and 8.

When the handle 10 is operated from this state and the operation plate 14 is slightly rotated, the spring piece 28 of the click spring 27 clicks into the next notch 26 of the operation plate 14, and the switch spring 42 on the lower surface of the operation plate 14 clicks into engagement. closes the switch and energizes the motor.

The rotation of the motor is transmitted to the rotary blade mounted on the upper end of the drive shaft 60 that protrudes upward from the boss 36 and the blade mount 4.

At this time, the operating wheel 15 rotates slightly as the operating plate 14 rotates, but the teeth of the upper gear 22 and the middle gear 23 mesh with the door operating plate 16 and the ripper operating wheel 17. It does not rotate and does not move the door 9 and trimmer block 6.

Further, the eccentric cam 64 provided on the outer periphery of the drive shaft 60 is not engaged with the drive rod 58 of the trimmer block 6, so the movable blade of the trimmer blade 7 is not driven.

In order to open the gate 8 and further take out the trimmer blade 7, the handle 10 may be further rotated.

The operating wheel 15 rotates via the operating plate 14, and the upper gear 22 first engages with the teeth of the door operating plate 16 to rotate the door operating plate 16.

At this time, the tip of the spring piece 29 rides on the protrusion 31, causing the spring piece 29 to bend.

Further, the door 9 moves with the rotation of the door operation plate 16, and the gate 8 opens.

Then, as shown in FIGS. 9 and 10, when the spring piece 29 returns over the protrusion 31 and the door operating plate 16 rotates to the point where a clicking sound is generated, the upper gear 22 is no longer in the teeth of the door operating plate 16. , and does not move even when the handle 10 is rotated thereafter.

Furthermore, at this point, the door operating plate 16 may rotate excessively due to friction between the operating wheel 15 and the door operating plate 16 because the door engaging rod 20 comes into contact with the pin 61 protruding from the upper housing 11. Nor.

Also in this state, the middle gear 23 of the operating wheel 15 is not engaged with the trimmer operating wheel 17.

When the gate 8 is opened and the handle 10 is further rotated after the click sound is generated, the middle gear 23 of the operating wheel 15 meshes with the trimmer operating wheel 17 and the trimmer operating plate 1 is rotated.
Rotate 8.

The rotation of the trimmer operating plate 18 rapidly changes the overlapping portion of the cam groove 19 with the trimmer pin guide groove 50 of the trimmer holding plate 49 from the outer peripheral side to the shaft side.

Therefore, the trimmer pin guide groove 50 and the cam groove 19 are
~The trimmer block 6 engaging the rimmer pin 52
The trimmer blade 7 moves forward while being guided by various parts and projects the trimmer blade 7 from the opened gate 8.

The trimmer pin 52 is finally located in the locking groove 47 to prevent the trimmer block 6 from retreating, and the trimmer block 6 rides on the push-up spring 63 provided at the front of the trimmer holding plate 49 to attach the blade. Press it against the bottom surface of table 4.

At this point, the tip of one spring piece 28 of the click spring 27 clicks into the notch 26 to define the operating plate and the switch spring 42 on the underside of the operating plate 14 also closes the switch and energizes the motor.

At this time, the drive rod 5 is
Since the narrow portions 8 are engaged, the rotational motion of the motor is converted into a swinging motion about the pin 57 of the drive rod 58, and this motion is also transmitted to the movable blade to drive the trimmer blade 7.

Further rotation of the handle 10 is prevented by the operation plate 14 coming into contact with the peripheral wall of the insertion hole 44.

When the handle 10 is rotated in the opposite direction, the trimmer block 6 first moves backward.

When the trimmer block 6 is completely retracted and retracted,
The trimmer operation plate 18 stops at a predetermined position by coming into contact with a pin 62 protruding from the upper housing 11, and does not follow the above movement of the handle 10.

When the handle 10 is further turned, the door operation plate 14 rotates while bending one spring piece 29 of the click spring 27, and the door 9 is moved.

When the door 9 finishes closing the gate 8 and comes into contact with the stopper 65, the spring piece 29 climbs over the protrusion 31 and falls down, producing a click sound.

At the same time, the tip of the other spring piece 28 of the click spring 27 also clicks into engagement with the notch 26.

In this state, the switch is still on, but if the handle 10 is further turned and only the operation plate 14 and operation wheel 15 are slightly rotated, the switch will be turned off.

In this way, the opening/closing of the gate 8 and the coming and going of the trimmer blade 7 are sequential operations, and when the trimmer blade 7 comes out of the gate 8, the door 9 has finished moving and the gate 8 is completely open. Since the pin 61 restricts excessive movement of the door 9, the movement of the trimmer blade 7 is performed smoothly from the movement of the door 9, and conversely, when the door 9 closes the gate 8, the trimmer blade 7 has finished moving and is completely moved. In the stored state, the pin 62 restricts unnecessary movement of the trimmer operation plate 18, so that the movement of the door 9 from the retraction of the trimmer blade 7 is performed smoothly, and the operation wheel is an intermittent gear. 15
This prevents a shift in the timing of engagement between the door operation plate 16 and the trimmer operation plate 18, thereby improving the stability and reliability of operation.

In addition, these pins 61 and 62 are used for positioning when installing the door operation plate 16 and trimmer operation plate 18, and also serve as indicators for checking the operation before installing the trimmer block 6. 1, and can be shaped simultaneously when the main body housing 1 is shaped, so there is no increase in cost.

Furthermore, in this embodiment, the door engaging rod 20 of the door operation plate 16 is engaged with one end of the door 9 in the longitudinal direction, and the pressing spring portion 21 extending from the door engaging rod 20 is used to control the door 9 in the other longitudinal direction. Since the end is pressed against the main body housing 1, the door 9 can be installed without rattling regardless of the size of the door 9, and there is no noise caused by foreign objects when the main body is shaken. It is possible to eliminate unpleasant noises caused by rattling, such as chattering noises caused by vibrations over time, and provides a good usability.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is an exploded perspective view of the same, Fig. 3 is an exploded perspective view of the main parts of the same, Fig. 4 is a sectional view of the main parts of the same, and Fig. 5 is a sectional view of the main parts of the same. FIG. 6 is a longitudinal sectional view of the same as above, FIG. 6 is a cross-sectional view of same as above, and FIGS. 11 and 12 show when the gate is opened, FIGS. 11 and 12 show when the trimmer blade comes out, and FIG. 13 is a plan view showing the operation of the door, with 1 showing the main body housing and 7 showing the trimmer blade. A blade, 10 is a handle, 14 is an operating panel, 15 is an intermittent gear operating wheel, 16 is a door operating panel, 18 is a trimmer operating panel,
20 is a door engaging rod, 21 is a pressing spring portion, and 61 and 62 are pins.

Claims (2)

[Scope of utility model registration request] (1) The trimmer blade access gate provided in the main body housing has a door that can be opened and closed freely, and the door operation plate and trimmer operation plate are installed intermittently on the operation plate that rotates in conjunction with the operation of the handle. In an electric shaver, the door operation plate connected through a gear opens and closes the gate with the door operation plate engaged with the door, and the operation of the trimmer operation plate is changed to a linear direction with a cam to move the trimmer blade in and out. An electric shaver in which a pin abuts at the end of the movement in the direction of opening the gate and a pin abuts at the end of the movement of the trimmer operation plate in the direction of retracting the trimmer blade are integrally protruded from the main body housing. (2) Scope of Utility Model Registration In the electric shaver described in claim 1, the door engaging rod extending from the door operating plate engages with one end in the longitudinal direction of the door and has an arc shape extending from the door retaining rod. The tip of the pressing spring presses the other end of the door in the longitudinal direction against the main body housing.