JPS6317470B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to the structure of a trimmer device for an electric shaver in which the tip of the trimmer block can be moved in and out of the body by rotating the trimmer block.

[Background technology] Conventionally, a trimmer block is rotatably attached to a body, and by rotating the trimmer block, the tip of the trimmer block protrudes from the body, and by pushing in and rotating the trimmer block, the trimmer block is attached to the body. There is a trimmer device for electric shavers that is designed to be stored, but since the trimmer block is attached so that it can rotate freely, if the trimmer block is not held down, it will wobble or sometimes close unexpectedly. There was a drawback.

[Object of the Invention] The present invention has been made in view of the points described above, and an object of the present invention is to prevent the trimmer block from rattling or unexpectedly due to resistance to rotation of the trimmer block. An object of the present invention is to provide a trimmer device for an electric shaver that can prevent the opening and closing of the trimmer.

[Disclosure of the Invention] The trimmer device for an electric shaver according to the present invention is equipped with a trimmer block, a trimmer mounting base, and a switching sliding plate, and the trimmer block has a fixed blade and a trimmer attached to the fixed blade. It consists of a movable blade that slides in reciprocating contact and a push-up spring that presses the movable blade against the fixed blade, which are assembled into a trimmer base, and are pivoted by a disk-shaped tip protrusion that faces the trimmer mount. The above-mentioned trimmer base, which is freely rotatable, is equipped with a drive hole near the pivot shaft, and the switching sliding plate from which a pair of mounting arms protrudes is arranged at right angles from the tips of the mounting arms. By being protruded and inserted into the drive hole, the switching sliding plate and the trimmer block are connected, and the trimmer block is rotated by sliding of the switching sliding plate, and is in elastic contact with the outer periphery of the tip protrusion. It is characterized by having a boss that goes over the outer periphery, and when the switching sliding plate is moved to rotate the trimmer block, the boss is provided on the switching sliding plate via the mounting arm. By making elastic contact with and riding over the outer periphery of a disk-shaped tip protrusion provided on the trimmer mount, resistance is generated when the trimmer block is rotated.

The present invention will be explained below based on the illustrated embodiment. This electric shaver has a mesh-like outer cutter 39 and a rotationally driven inner cutter on the front surface of the upper end of the housing 1 and 2, which are formed into two halves. A main blade block A consisting of 38 is disposed, a trimmer block B is disposed at the upper end of the back, and a switch block G is disposed on one side. As is clear from FIG. 1 and FIG.
Rotates using the upper end as a fulcrum.

Inside the housings 1 and 2, which are connected to each other by a hook 1e shown in FIG. 5 protruding from the housing 1 on the back side and a connecting screw 34, a module block 18 consisting of a storage battery, a charging circuit, etc. is located at the bottom. At the same time, a motor 17 is housed in the upper part via a motor mount 8. In addition, a U-shaped lever 12, a trimmer joint 10, etc. are mounted on the motor mounting base 8, and a trimmer mounting base 19 that holds the trimmer block B and the switching sliding plate 21, and a driver frame. 5, a drive element 7, etc. are provided.

The switch block G is as shown in FIG.
Switch spring 28, lock spring 29, lock button 30, switch handle 31, and switch frame 3
2, which is attached to the side opening of the housing 1.

As shown in FIGS. 4 and 5, the motor mounting base 8 to which the motor 17 is fixed by the screws 9 is approximately cylindrical with an open back surface, and the output shaft 17a of the motor 17 is mounted on the front surface 8e. Shaft through hole 8f through which
, a guide groove 37, and a pair of bosses 8d, with a shaft pin 8c protruding from both sides, a shaft pin 8a protruding from the top surface, a rib 8i on the bottom surface, and a rear surface. The opening edge is provided with a pair of receiving holes 8h.

Next, the trimmer mounting base 19, the trimmer block B mounted thereon, and the switching sliding plate 21 will be explained. As shown in FIGS. 4 and 5, the trimmer mount 19 has disk-shaped protrusions 19j having shaft holes 19a at their tips protruding from both sides of the upper edge of the base portion 19d, and facing each other. The locking arms 19e are made to protrude forward from both side edges, and the engagement arms 19f are made to protrude forward from the lower end edge, and each locking arm 19e has an outwardly bent tip. A locking piece 19c is provided, and an engaging hole 19i is provided in the engaging arm 19f. Further, two parallel guide grooves 19b are provided in the base portion 19d.

As shown in FIG. 5, the trimmer block B includes a fixed blade 26 fixed to a trimmer base 27, a movable blade 25 that is driven to slide in reciprocating contact with the fixed blade 26,
Trimmer drive element 24 attached to movable blade 26
, a push-up spring 23 that presses the movable blade 25 against the fixed blade 26, and a dustproof plate 22, and the trimmer base 27 to which these parts are assembled is as follows:
Pivot plate portions 27d are provided facing each other on both sides of the inner surface of the fixed blade mounting plate portion 27c bent in an L-shape,
A pivot hole 27 is provided at the tip of this pivot plate portion 27d.
drive holes 27b are formed at positions close to the bent portions of the fixed blade mounting plate 27c. Trimmer drive element 2 fixed to movable blade 25
4 is provided with a protruding connecting piece 24a.

The switching sliding plate 21 is provided with unevenness as a finger rest part 21e on the lower part of its back side, and as shown in FIGS. 4 and 5, a pair of mounting arms 21d protrude from the upper edge of the plate body 21c. At the same time, a pair of sliding bosses 21b are projected forward from both sides of the central portion, and a boss 21a that projects outward at a right angle is provided at the tip of each mounting arm 21d. 21b has an undercut portion 21
f is formed.

The trimmer block B is rotatably attached to the trimmer mount 19 by press-fitting the support pin 20 into the shaft hole 19a of the trimmer mount 19 and the pivot hole 27a of the trimmer base 27.
In addition, the switching sliding plate 21 connects the boss 21a to the trimmer base 2.
At the same time, the sliding boss 21b is slidably inserted into the guide groove 19b of the trimmer mounting base 19, and the undercut portion 21f protruding from the side surface of the sliding boss 21b is inserted into the trimmer mounting base 1.
By hooking it onto the end of the guide groove 19b of No. 9, it is slidably attached to the trimmer mounting base 19. At this time, the boss 21 of the switching sliding plate 21 fitted into the drive hole 27b of the trimmer base 27
As shown in FIGS. 7 and 9, a is slidably attached to the outer periphery of a disc-shaped tip protrusion 19j of the trimmer mount 19 connected to the shaft hole 19a of the trimmer base 19 with a support pin 20. come into contact with bullets. In addition, the click spring mounting hole provided on the trimmer mounting base 19 and the switching sliding plate 2
Between the center hole 21h of 1 and the trimmer mounting base 19
A click spring 40 is provided to provide a click characteristic to the movement of the switching sliding plate 21 relative to the movement of the switching sliding plate 21.

Next, the members attached to the motor mounting base 8 will be explained. Shaft pin 8a in motor mounting base 8
includes a ring 11, a presser spring 45, and a joint bearing 3.
6, the trimmer joint 10 is attached so as to be rotatable around the shaft pin 8a. Furthermore, the pair of shaft pins 8c protruding from both sides of the motor mounting base 8 are fitted with bearing holes 12a drilled at the center of each side piece 12d of the lever 12, so that the lever 12 can be freely rotated. It is attached.

A trimmer joint 10 whose longitudinal center portion is pivotally supported by a shaft pin 8a has grooves 10a and 10a at both ends thereof, respectively.
10b, the lever 12 is made up of the above-mentioned side pieces 12d and a horizontal plate 12e connecting the rear ends of the both side pieces 12d, and each side piece 12d has a shaft hole 12a and a tip end. A long hole 12b is formed in the horizontal plate 12e, and two holes 12c are formed in the horizontal plate 12e.

Furthermore, on the front side of the motor mounting base 8, there is a drive element 7,
A driver frame 5 is provided. The drive element 7 is an annular member provided with a pot-shaped drive hole 7d, and has a spherical part 7b protruding toward the back at the upper end.
The lower end is provided with a fulcrum hole 7a. The drive hole 7d is composed of a narrow trimmer joint swinging part 7e on the upper end side and a wide main blade rotating part 7f on the lower end side.

The drive element frame 5 is plate-shaped, and has an elliptical drive shaft insertion hole 5d in the center, convex portions 5c with tapered side edges on both sides, and horizontal bosses 5b from both end surfaces. It protrudes and is provided with a fulcrum pivot hole 5a at its lower end.

The driver 7 and the driver frame 5 are connected to each other by inserting the guide pin 35 into the fulcrum hole 7a, the ring 6, and the fulcrum pivot hole 5a, so that the driver is assembled so that it can rotate freely.

Here, the driver frame 5 and the driver 7
As shown in FIG. 3, the rear side portion of the guide pin 35 that connects the two is inserted into the guide groove 37 formed in the front surface 8e of the motor mount 8, so that the motor mount 8 The hole 12b of the lever 12 fits into the horizontal boss 5b of the driver frame 5, and the spherical portion 7b at one end of the driver 7 is engaged with the groove 10a at one end of the trimmer joint 10, as shown in FIG.

On the other hand, the drive shaft 16 is attached to the output shaft 17a of the motor 17. This drive shaft 16 includes an eccentric cam portion 16a, a locking tooth 16b, and a connecting shaft 16c.
The eccentric cam portion 16a is located within the drive hole 7d, and the locking teeth 16b are integrally formed with the drive element 7 disposed on the front surface of the motor mounting base 8. The connecting shaft 1 is located in the drive shaft insertion hole 5d and protrudes from the center of the drive shaft 16.
6c projects forward through the center hole 3c of the blade mount 3 attached to the opening 2b on the front surface of the upper end of the housing 2.

As is clear from FIGS. 3 and 5, the sliding shaft 15 is slidably attached to the connecting shaft 16c, and the fixed ring 13 is fixed to the tip, and a compression coil spring is inserted between the two. 14 are arranged. The sliding shaft 15 has a meshing portion on its rear end surface that meshes with the locking teeth 16b of the drive shaft 16, and when the sliding shaft 16 meshes with the locking teeth 16b due to the urging force of the compression coil spring 14, motor 17
The rotation is transmitted to the inner cutter 38 via the sliding shaft 15.

The disk-shaped blade mount 3 has a protrusion 3a on the back surface, and when the blade mount 3 is inserted into the blade mount insertion hole 2b, the protrusion 3a is inserted into the opening of the housing 2. The housing 2 is connected to the housing 2 by rotationally engaging the engaging protrusion 2a provided on the inner surface of the housing 2b. Further, the screw 4 shown in FIG. 5 is screwed to the mounting boss 8d of the motor mount 8 through the round hole 3b of the blade mount 3, so that it is also connected to the motor mount 8.

The trimmer mount 19 to which the trimmer block B and the switching sliding plate 21 are attached is attached to the housing 2 by engaging the locking piece 19c of the trimmer mount 19 with the notch groove 1a provided on the inner surface of the housing 1. At this time, the trimmer block B and the finger hook 2 of the switching sliding plate 21 are fixed to the housing 1 through the storage hole 1b formed at the upper part of the back surface 1c.
1e is exposed to the outside.

The motor mount 8 to which the motor 17, the lever 12, the trimmer joint 10, the driver 7, and the driver frame 5 are attached connects the pin 19h protruding from the trimmer mount 19 to the motor 1 to receive the motor mount 8. By fitting into the hole 8h and by bringing the three ribs 8i at the rear end of the motor mount 8 into contact with the edge of the locking hole 19i of the trimmer mount 19, the position. After the driver 7 and the driver frame 5 are arranged on the front surface of the motor mount 8, the motor mount 8 is assembled by assembling both the housings 1 and 2 and fixing the blade mount 3 to the housing 2. A fixation is made.

When assembled in this way, the sliding boss 21b of the switching sliding plate 21 fits into the hole 12c formed in the horizontal plate 12e of the lever 12. Further, a connecting piece 24a protruding from the trimmer drive element 24 of the trimmer block B engages with the groove 10b on the rear end side of the trimmer joint 10.

Next, the operation will be explained. Trimmer block B
When is in the stored state as shown in Figure 1,
By operating switch block G, motor 17
At this time, the eccentric cam portion 16a of the drive shaft 16 rotates freely within the wide main blade rotating portion 7f of the drive hole 7d in the driver element 7, and the rotation of the drive shaft 16 is caused by sliding. It is transmitted to the inner cutter 38 via the moving shaft 15.

In order to rotate the trimmer block B 90 degrees around the shaft hole 19a of the trimmer mounting base 19 as a fulcrum and project the trimmer block B backward from the back surface of the housing 1 as shown in FIG. All that is required is to move the provided switching sliding plate 21 upward. As the switching sliding plate 21 moves upward, the trimmer block B rotates, the driver 7 and the driver frame 5 move, and the motor 17 and the inner cutter 38 of the main cutter block A rotate. The storage hole 1b on the back side of the housing 1 is exposed as the trimmer block B rotates.
is covered by the upwardly moved switching sliding plate 21, and the switching sliding plate 21 protects the storage hole 1b from dust.

Since the switching sliding plate 21 is connected to the trimmer base 27, the trimmer block B rotates as the switching sliding plate 21 moves upward.
This is done by being pushed up. At this time, as shown in FIGS. 7 and 9, the boss 21a of the switching sliding plate 21 moves along the outer circumference of the tip projection 19j of the trimmer mount 19, and this movement also moves along the outer circumference of the tip projection 19j of the trimmer mount 19. This is performed with the boss 21a in elastic contact with the outer periphery, and the boss 21a is in elastic contact with the outer periphery.
1a is moved in a direction substantially perpendicular to the sliding direction of the switching sliding plate 21 during its movement, and rides over the outer periphery of the tip projection 19j, and the movement of this boss 21a clicks to open and close the trimmer block B. Furthermore, due to the resistance when the boss 21a passes over the outer periphery of the tip projection 19j, rattling of the trimmer block B and inadvertent opening/closing are suppressed.

The movement of the driver 7 and the driver frame 5 accompanying the upward movement of the switching sliding plate 21 is performed via the lever 12. The lever 12, which fits the hole 12c into the sliding boss 21b of the switching sliding plate 21, rotates around the shaft pin 8c of the motor mounting base 8 as the switching sliding plate 21 moves upward. , long hole 12b of lever 12
The drive element frame 5 into which the horizontal boss 5b is fitted
is made to slide together with the drive element 7. This movement causes
The eccentric cam portion 16a of the drive shaft 16 is located at the trimmer joint swinging portion 7e in the drive hole 7d of the driver 7, and its rotation causes the driver 7 to swing about the fulcrum hole 7a.

Here, the trimmer joint 10 that engages the spherical portion 7b of the driver element 7 with the groove 10a at one end swings about the shaft pin 8a of the motor mounting base 8 as the driver element 7 swings. , the trimmer drive element 24, that is, the movable blade 25, which engages the connecting piece 24a in the groove 10b at the other end, is caused to reciprocate.

Further, as the driver frame 5 moves, the convex portion 5c formed on the front surface of the driver frame 5 moves to the back of the sliding shaft 15, pushes up the sliding shaft 15, and separates the sliding shaft 15. Disengage the engagement teeth 16b of the drive shaft 16. For this reason, the rotation of the motor 17 is
The information cannot be transmitted to the inner blade 38.

Conversely, when the switching sliding plate 21 is slid downward, the lowered trimmer block B rotates and is stored in the storage hole 1b on the back of the housing 1, exposing only the surface of the trimmer base 27 to the outside. . The fixed blade 26 and the movable blade 25 are located on the back side 1c of the housing 1.
Since the movable blade 25 and the fixed blade 26 are located deeper, the movable blade 25 and the fixed blade 26 are protected.
5 and the fixed blade 26 will not cause injury.

Then, by moving the driver frame 5 and the driver 7 via the lever 12, the drive shaft 16 and the driver 7 are moved.
At the same time as the separation is performed, the convex portion 5c of the driver frame 5 moves away from the back of the sliding shaft 15, and the sliding shaft 15 engages with the driving shaft 16 under the bias of the compression coil spring 14. In order to allow this, the subsequent rotation of the motor 17 is transmitted only to the inner cutter 38.

[Effects of the Invention] Since the present invention is constructed as described above, the trimmer block can be rotated by sliding the switching sliding plate to protrude or retract the trimmer block. When the switching sliding plate is moved to rotate the trimmer block, the boss provided on the switching sliding plate via the mounting arm is in elastic contact with the outer periphery of the disc-shaped tip protrusion provided on the trimmer mounting base. In order to overcome this outer periphery, the movement of this boss provides click characteristics for opening and closing the trimmer block, and at the same time provides resistance to the rotation of the trimmer block. This prevents rattling and inadvertent opening and closing of the trimmer block.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the trimmer block according to an embodiment of the present invention when it is stored, Fig. 2 is a perspective view of the same trimmer block when it is opened, Fig. 3 is an enlarged vertical cross-sectional view of the operating part of the above, and Fig. 4 is a perspective view of the same when the trimmer block is opened. The figure is an exploded perspective view of the operating part of the same as the above, Figure 5 is an exploded perspective view of the whole of the same as the above, and Figure 6 is an exploded perspective view of the boss of the switching sliding plate, the tip projection of the trimmer mount, and the trimmer base as the same as the above. , FIG. 7 is an explanatory diagram of the positional relationship of the same as above, FIGS. 8a, b, and c are explanatory diagrams of the rotating state of the trimmer block of the same as above, FIG. The figure is a schematic vertical cross-sectional view of the same trimmer block as above in the stored state, where B is the trimmer block, 19 is the trimmer mounting base, 19a is the shaft hole, 19j is the tip projection, 20 is the support pin, and 21 is the switching sliding plate. , 21b is the boss, 21
d is a mounting arm, 23 is a push-up spring, 25 is a movable blade, 26 is a fixed blade, 27 is a trimmer base, 27a is a pivot hole, and 27b is a drive hole.

Claims (1)

[Claims] 1 A device comprising a trimmer block, a trimmer mounting base, and a switching sliding plate, wherein the trimmer block has a fixed blade, a movable blade that reciprocates in sliding contact with the fixed blade,
It is constructed by incorporating a pressure spring that presses the movable blade against the fixed blade into the trimmer base, and is rotatable by being pivoted by a disc-shaped tip projection provided opposite to the trimmer mounting base. The trimmer base is provided with a drive hole near the pivot shaft portion, and a switching sliding plate from which a pair of mounting arms protrudes is provided so as to protrude at right angles from the tips of the mounting arms so as to fit into the drive hole. A boss is provided that connects the switching sliding plate and the trimmer block by being inserted into the switching sliding plate, rotates the trimmer block by sliding the switching sliding plate, and rides over the outer periphery of the tip protrusion while elastically contacting the outer periphery. An electric razor trimmer device characterized by: