JPS6041957B2 - electric razor trimmer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a trimmer device for an electric shaver, and an object thereof is to eliminate the need for a click spring for holding the trimmer.

An electric shaver to which an embodiment of the present invention is applied is shown in FIGS. 1 to 11.

That is, as shown in FIG. 4, this rotary electric shaver includes a housing block A, a motor cover block B,
The blocks are divided into a drive block C, an eccentric shaft block D, a blade mount block E, a trimmer block F, a cap block G, and a battery cover block H shown in FIG. First, as shown in Figures 1 to 4, the housing block A is formed into a cylindrical body in which the main body case 1 is enlarged at both ends and narrowed at the center. It is formed by combining two divided housings 2 and 3.

Each of the housings 2 and 3 is integrally formed by molding means, and the upper housing 2 has a fitting cylinder 4 stepped and projected at its lower end, which is a narrow diameter part, and an upper projection 5 on the outer surface of its base. A locking step 6 is formed inside the root portion, and a motor mount receiving step 7 is formed inside the upper end portion which is the large diameter portion. The lower housing 3 has an upper concave portion 8 formed at its upper end, which is a small diameter portion, and a mounting ring locking stage 9 and a switch cover receiving stage 10 at its lower end, which is a large diameter portion. The upper housing 2 and the lower housing 3 are assembled by having their small diameter portions facing each other, fitting the fitting cylinder 4 into the other small diameter portion, and locking the upper female protrusion 5 into the upper female recess 8. Furthermore, the motor cover 11 and the mounting ring 12 of the motor cover block B are integrally coupled by screwing them together.

That is, to explain the housing coupling structure of the motor cover 11 and the mounting ring 12, the motor cover 1
1 is mainly formed of a cylindrical part 15 having a bottom part 14 for accommodating a motor 13, and a pair of opposing connecting legs 17 and 18 extending from one end of this cylindrical part 15 and accommodating a battery 16. , 18 form an arcuate surface as if formed by cutting a slit into a cylinder and are inscribed in the fitting cylinder 4, and a locking collar 19 is provided protruding from the outer surface of the base thereof, and the connecting legs 17, A male threaded portion 20 having a thread diameter larger than the inner diameter of the fitting cylinder 4, which is the smallest inner diameter among the housings 2 and 3, and a shorting fitting locking hole 20'' are formed at the tip of the shorting fitting 21. The mounting ring 12 has a cylindrical shape with a locking protrusion 23 cut and raised on the side surface.The mounting ring 12 is formed of a stepped cylinder, with internal threads 24 and 25 formed inside, and an operating groove 25'' formed at the lower end. Numerous locking claws 27 on the external stage 26
It stands out. First, the connecting legs 17, 1 of the motor cover 11
8 is inserted into the upper housing 2 with the housings 2 and 3 combined, and penetrates into the lower housing 3. At this time, since the screw diameter of the threaded portions 20 of the connecting legs 17 and 18 in the fitting cylinder 4 is large, the fitting cylinder 4 is bent in the radial direction due to the elasticity of the resin. On the other hand, the shorting fitting 21 is fitted between the connecting legs 17 and 18 from the lower housing 3, and is locked to the end face at 22, and the locking protrusion 23 is locked to the shorting fitting locking hole 2'' and removed. Stop it. Furthermore, insert the mounting ring 12 into the lower housing 3, and
4 into the male threaded portions 20 of the connecting legs 17, 18 and tighten. As a result, the locking collar 1 at the base of the connecting legs 17 and 18
9 is engaged with the locking step 6 of the upper housing 2, and the outer step 26 with the locking claw 27 of the mounting ring 12 is locked with the locking step 9 of the lower housing 3, so that the housings 2 and 3 are not mutually connected. At the same time, the mounting ring 12 is clamped by the locking claw 2.
7 bites into the locking stage 9 and is prevented from loosening. The motor cover block B is the bottom part 1 of the motor cover 11 described above.
4 is formed of a support cylinder 28, an arm 29 extending radially in a radial direction to which it is attached, and an inner stage 30. A ring-shaped push-up spring 31 is suspended on this inner stage 30, and the support cylinder 2
An anode metal fitting 32 is attached to the lower surface of the anode metal fitting 8, and a motor terminal contact 33 extending from the anode metal fitting 32 is made to protrude upward.

In addition, current-carrying fitting mounting holes 34 and 35 are formed in the connecting leg 18 and the cylindrical portion 15 on the extension line thereof, and a pair of mounting screw holes 36 and 37 are formed in one opposing portion of the opening edge of the cylindrical portion 15 to protrude. There is. The current-carrying metal fitting 38 is a band-shaped metal fitting with a locking pawl 3 at its upper end.
9 is bent, a motor case contact 40 serving as an electrical single pole is formed inside the connecting portion, a step 41 is bent below the step 41, a locking hook 42 is formed below the step 41, and the lower end is bent. A bent part 43 for press-welding the short-circuiting metal fitting is formed in the part, and the locking pawl 3 at the upper end penetrates the bottom part 14 inside the motor cover 11.
9 is inserted and locked into the mounting hole 43 of the cylindrical portion 15, the step 41 is locked with the inner step 30, and the locking hook 42 is locked with the mounting hole 35 of the connecting leg 18. In this state, the motor case contact 40 and the bent portion 43 protrude inward of the motor cover 11, and the bent portion 43 connects the shorting fitting 21 to the connecting leg 17.
, 18, the outer surface of the shorting fitting 21 and the bent portion 4
3 are in electrical contact, and when the motor 13 is press-fitted into the cylindrical portion 15 from the upper end of the motor cover 11 to prevent rotation and is pressed against the push-up spring 31, the motor case contact 40 comes into contact with the side surface of the motor case. This means that one pole side of the motor 13 is electrically connected to the shorting fitting 21. On the other hand, the lower end of the motor 13 (
A ten-pole terminal (not shown) protruding from the (or rear end) surface comes into elastic contact with the contact point 33 of the anode metal fitting 32. Therefore, when the battery 16 is inserted between the connecting legs 17 and 18 through the shorting fitting 21, the anode 16a of the battery 16 comes into contact with the anode fitting 32, is mechanically supported, and is in electrical contact, so that the positive voltage is directly applied to the motor 13.
is supplied to the terminal on the 10th side. The drive block C has a configuration in which a drive rod 45, a trimmer handle 46, and a trimmer lever 47 are assembled to a motor mounting base 44.

The motor mount 44 is a cylindrical portion 4 that crowns the front end of the motor 13.
8, with a cylindrical boss 50 protruding from the center, screw bosses 51 and 52 protruding on one diameter line including this center, and screw bosses 51 and 52 on the other diameter line perpendicular to the cylindrical boss 50. A drive shaft cylinder 53 protrudes from one side, and two screws 54
When the disk portion 49 is attached to the screw holes 36 and 38 of the motor cover 11 with the
to be locked. A trimmer handle 46 is rotatably fitted onto the cylindrical boss 50 of the motor mount 44 . This trimmer handle 46 has a disk portion 49 extending radially from its bearing portion 55.
The arm 56 is extended with a length corresponding to the radius of the arm 56.
A knob 57 is formed with a knurl at the tip thereof, and a hole concealing plate 58 in the shape of an arc plate with a radius of curvature of the same degree as that of the disc part 49 is formed on both sides of the knob 57, and a slide guide groove is formed on the upper surface of the arm 56. 59 (FIGS. 8 and 9). Further, a trimmer lever 47 is rotatably fitted onto one screw boss 51 of the motor mounting base 44 . This trimmer lever 47 has a planar arc plate shape, a bearing hole 60 at one end is fitted onto a screw boss 51, a lever pin 61 is crimped onto the tip, and the trimmer lever 47 is slidably fitted into a guide groove 59 of the trimmer handle 46. A cam groove 62 with a stopper is formed in.
Therefore, as shown in FIGS. 8 and 9, the trimmer lever 47 moves into the guide groove 59 by rotating the trimmer handle 46.
At the same time, the cam groove 62 swings within a range regulated by . The rotation center of the trimmer handle 46 and the trimmer lever 4
If the rotation centers of 7 are set at different positions, the trimmer handle 46'' and the trimmer lever 47'' can be moved as shown in Fig. 12a.
As is clear from the comparison diagram, when the amount of movement S of the trimmer base 103 and the amount of rotation of the trimmer handles 46, 46'' are the same, the force 1. the groove length Q This cam groove 62 engages a base pin 118 (details will be described later) that is slidable in the direction of an imaginary line P1 connecting the center of the cylindrical boss 50 and the center of the shaft cylinder 53. The base pin 118 is moved in the direction of the imaginary line P1 by the rotation of the trimmer lever 47.
When moving in the direction of the arrow S1 (the trimmer will protrude), slide the protruding cam curve 62a on the groove edge and move the base pin 11.
When moving 8 in the opposite direction to the arrow S1 (resulting in a retiring operation of the trimmer), the cam 8 is moved by sliding along the immersive cam curve 62b. These average inclinations θ1 are about 45 knots or less with respect to the imaginary line P3 that is perpendicular to the imaginary line P1 and parallel to the imaginary line P2 connecting the screw bosses 51 and 52, so that the operation of the trimmer handle 46 is made easier. On the other hand, from the state shown in FIG. 9 (corresponding to the protruding state of the trimmer), move the base pin 118 in the opposite direction to the arrow S1. A stopper 62c is protruded from one end of the protruding cam curve 62a of the cam groove 62 to prevent the trimmer lever 47 from rotating in the reverse direction when pressed. The amount of protrusion of this stopper 62c is such that the amount of protrusion of the stopper 62c is such that the base pin 1 is attached to one end of the cam groove 62 as shown in FIG.
The center point when 18 is located. An imaginary line P4 connecting N and the center of the screw boss 51 that pivots the trimmer lever 47, and an imaginary line P5 connecting the center point N and the tip edge of the stopper 62c.
If the inclination angle θ2 between the
It is preferable that the angle is within the range of θ≠±300, and reverse rotation can almost certainly be prevented. Furthermore, the drive rod 45 is fitted into the shaft cylinder 53 of the motor mount 44 so as to be swingable.

This drive rod 45 has a shaft hole 63 formed in the middle part, an eccentric cam engagement elongated hole 64 extending in the longitudinal direction on one end side, and a loose fitting groove 65 that tapers toward the tip end on the other end side. The tapered part of the shaft is used as the driver engaging part 66, and the shaft hole 6
3 into the shaft cylinder 53 of the motor mounting base 44 and press-fit the head press-fit pin 6.
7 into the shaft cylinder 53 and press the drive rod 45, the elongated hole 6
4 is located just above the cylindrical boss 50, and the drive engagement portion 66
is located at the peripheral edge of the disc portion 49. l The eccentric shaft block D consists of an eccentric shaft 68, a coupling 69, a joint spring 70, and a joint bush 71.

The eccentric shaft 68 includes an eccentric cam 72, a claw body 73, and a step shaft 74a.
~74c is integrally formed, and a shaft hole 75 is formed on the lower surface of the eccentric cam 72.
An eccentric cam 7 is mounted on the motor shaft 13a of the motor 13 that protrudes upward from the cylindrical boss 50 of the motor mounting base 44.
When the shaft hole 75 of No. 2 is crimped, the eccentric cam 72 connects to the drive rod 45.
It fits into the long hole 64 of. The coupling 69 has a cylindrical body whose lower part is enlarged in diameter, an engaging claw 76 is formed on its lower surface, and the outer surface of the upper cylindrical part is an inner blade rotation transmitting part 77. It is rotatably fitted into the lower two stages of 74a to 74c. The joint spring 70 is a coil spring, and has a three-stage shaft 74a.
It is passed through the intermediate shaft 74b of ~74c, and its lower end is in contact with the coupling 69. The joint bush 71 is formed into a cylindrical body, and is press-fitted to the uppermost shaft 74a of the three-stage shafts 74a to 74c to compress the joint spring 70. In the eccentric shaft block D having such a configuration, the eccentric shaft 68 is rotated by the operation of the motor 13, and the drive rod 45 is oscillated by the rotation of the eccentric cam 72. Further, when the coupling 69 is pushed by the joint spring 70 and engages with the claw body 73, the coupling 69
9 also rotates, but when the coupling 69 is moved upward and disengaged from the pawl engagement, the rotation is not transmitted and stops, and its rotation is controlled by the vertical movement of the coupling 69. The blade mount block E has a bottom 7 in the middle part of the cylindrical blade mount 78.
9, a cylindrical hole 80 is formed in the center, a taper 81 is formed on the upper edge of the blade mount 78, an outer blade mounting female screw 82 is formed on the inner surface, and a sixth hole is formed on the lower opening edge. As shown in the figure, a holding stage 83 is formed and a part thereof is cut out to form a trimmer retractable window 84 and a knob window 85 for the trimmer handle 46.
A trimmer guide groove is formed in the opening direction of the trimmer retractable window 84 on one diameter line including the cylindrical hole 80 on the lower surface of the bottom part 79, and a boss guide groove 86 is formed on the window side with the cylindrical hole 80 in between.
, the opposite side of the window is a base pin guide groove 87, and the guide groove 86
, 87, L-shaped hooks 88 for holding the trimmer are integrally suspended from the central portions of both sides of the trimmers 87 with a cylinder hole 80 in between, and mounting cylinders 89 are formed on each outside of the hooks 88. When this blade mount 78 is attached with two screws 90 by fitting the mounting tube 89 into the screw bosses 51 and 52 of the motor mount 44, the locking step 83 locks to the upper edge of the upper housing 2, and The knob 57 of the trimmer handle 46 is located in the knob window 85 (second
), coupling 69 of eccentric shaft block D to cylindrical 80
is inserted.

The outer cutter body 91 is attached to the female thread 82 of the blade mount 78, and the inner cutter body 92 is fitted to the coupling 69 in a rotatable and slidable manner, and the blade mount 78
The trimmer block F is installed on the back side of the First, the outer cutter body 91 has a mounting male screw 95 formed at the lower end of a cylindrical outer cutter holder 93 via a step 94, a taper 96 formed in the step 94, and a reticulated outer cutter 97 on the upper edge. When screwed into the female thread 82 of the blade mount 78, the step 94 of the outer blade holder 93 and the upper end surface of the blade mount 78 come into contact, and both tapers 81 and 96 face each other to lock the cap. A groove 98 is formed. The inner blade body 92 has a cylindrical portion 9 that fits into the coupling 69.
A mushroom-shaped umbrella 100 has radial slits 101 formed therein, and a pressing spring (not shown) facing the slit 101 is provided on the lower surface of the umbrella 100 to support the lower end of the inner cutter 102 from the slit 101. Before attaching the outer cutter body 91 to the blade mount 78, the cylindrical portion 99 of the inner cutter body 92 is fitted into the joint bush 71 of the eccentric shaft block D.
The upper end surface of 1 is thrust-bearingly supported on the bottom of 1, and a coupling 69 is rotatably and movably fitted. In this way, the outer cutter body 91 and the inner cutter body 92 are arranged so that the inner cutter 102 of the inner cutter body 92 is placed inside the net-like outer cutter 97 of the outer cutter body 91, and the inner cutter 102 is attached to the outer cutter 97 by the rotation of the coupling 69. The cutting action of the whiskers introduced into the blade hole by sliding on the inner surface is achieved, while the rotation of the coupling 69 is stopped due to the upward movement of the coupling 69, and the razor action is stopped; in this case, the bottom part 79 of the blade mount 78 It becomes a beard waste collection area. The trimmer block F has a trimmer base 103 as its main body, and has a generally T-shaped planar shape as shown in FIG. A hanging piece 105 and an inner protrusion (not shown) are formed on both sides of the head, and a fixed blade 106 is fixed between the hanging pieces 105 on the lower surface of the head.
A movable blade 107 is slidably stacked on the lower surface of 06, a driver 108 is integrally attached to the movable blade 107, and locking holes 112 are formed in both side pieces 111 of a pressing piece 110, which is formed by cutting and raising a pressing spring 109, so that it hangs down. It is engaged with the protrusion of the piece 105 and presses the pressing spring 109 against the driver 108, thereby bringing the movable blade 107 into elastic contact with the fixed blade 106 and the driver 108.
By driving the drive pin 113 of the movable blade 107
slides back and forth on the fixed blade 106 to perform a waving motion.

On the other hand, the leg of the trimmer base 103 has a substantially pot-shaped long hole 114 formed in its longitudinal direction, and a blade mount resilient protrusion 115 made of resin elasticity is formed on both sides of the large diameter side in parallel to the side edge. The taper 1 for pushing up the coupling has a rising slope toward the small diameter side at the connecting part between the large diameter side and the small diameter side of the elongated hole 114.
16 is formed.

Furthermore, sliding steps 117 are formed on both sides of the legs of the trimmer base 103 to be slidably guided by the L-shaped hooks 88 of the blade mount 78, and base pins 118 are press-fitted into the rear ends of the legs. It protrudes both upward and downward. When the trimmer block F faces the back side of the blade mount 78 and is pushed into the L-shaped hook 88 and the hook 88 is engaged with the sliding stage 117 of the trimmer base 103, the elastic protrusion 115 is attached to the bottom 79 of the blade mount 78. The split boss 104 fits into the guide groove 86, and the upper end of the base pin 118 fits into the guide groove 87. Through these engagements and fittings, the trimmer block F is attached to the blade mount. 78 so as to be slidable.

In this way, the substantially pot-shaped elongated hole 114 of the trimmer base 103 is located below the cylindrical hole 80 of the blade mount 78, and the trimmer base 103
The head of No. 3 is located in the trimmer exit window 84. When attaching the blade mounting base 78 to the motor mounting base 44, the coupling 69 is loosely inserted into the large diameter side of the long hole 114, and the base pin 1
The lower ink end of 18 engages with the cam groove 62 of the trimmer lever 47, and the drive pin 113 of the driver 108 engages with the drive rod 45.
is inserted into the loose fitting groove 65 of. In this way, the trimmer block F
The operation is as follows.

That is, when the trimmer handle 46 is rotated in the direction S2 in FIG. 8, the trimmer lever 47 is rotated from the state shown in FIG. 8 to the state shown in FIG. The pin 118 is aligned in the direction of the guide groove 87 (imaginary line P1,
The trimmer block F moves toward the arrow S1) and moves to the guide groove 86.
, 87 and hook 88, and its head protrudes from the trimmer retractable window 84 of the blade mount 78. Due to the protruding operation of the trimmer block F, the substantially pot-shaped elongated hole 114 of the trimmer base 10-3 moves and the lower surface of the coupling 69 rests on its taper 116, and the coupling 69 is pushed up by the taper 116. It rests on the edge of the hole on the small diameter side. As a result, the coupling 69 is disengaged from the claw body 73 of the eccentric shaft 68, the rotation of the eccentric shaft 68 is no longer transmitted, and the inner cutter body 92 does not rotate even if the motor 13 operates. Furthermore, as the trimmer base 103 moves, the drive pin 113 of the driver 108 of the trimmer movable blade 107 moves and engages with the engaging portion 66 within the loose fitting groove 65 of the drive rod 45, causing the drive rod 45 to swing. The dynamic motion is transmitted and the movable blade 107 slides against the fixed blade,
It enters a sharp operating state. Further, when the trimmer block F is in the protruding state, the base pin 118 is locked to the stopper 62c at one end of the cam groove 62, so when the base pin 118 is pushed as explained in connection with the drive block C, the trimmer lever 47
This prevents the trimmer blade from sinking even if the skin is pressed against the trimmer blade unless the trimmer handle 46 is rotated in the opposite direction to the arrow S2. When the trimmer handle 46 is retracted, the drive pin 113 has play within the loose fitting groove 65 of the drive rod 45, so the movable blade 107 stops, and the eccentric shaft is positioned on the large diameter side of the long hole 64 of the coupling 69. 68 and the rotational force is transmitted to the coupling 69. The cap block G is in contact with the upper end surface of the upper housing 2 and tapers 96 between the outer blade body 91 and the blade mount 78.
, 81 into the locking groove 98 formed by the first
As shown in the figure, it forms an hourglass shape that is continuous with the outer shape of the upper housing 2.

This cap block G consists of a cap holder 119 and a cap cover 120. The cap holder 119 is
It is a conical cylinder with a tapered curved surface continuous to the upper end of the upper housing 2, and has an engaging circumferential groove 121 inside its large diameter end.
At the same time, an escape circumferential groove 12 is formed inside the small diameter end.
2 is formed. The cap cover 120 contacts the large-diameter end of the cap holder 119 at the periphery of a top plate 123 having an arcuate surface, and forms a short outer cylinder 124 on the lower surface of the top plate 123 to fit into the engagement circumferential groove 121. A matching collar 125 is formed, and an inner cylinder 126 is further suspended inside the outer cylinder 124. This inner cylinder 126 has a plurality of slits 1 opened at the lower end.
27 to provide flexibility in the radial direction, and an attachment/detachment protrusion 128 is formed on the inner surface of the inner cylinder 126 to engage with the outer blade body 91 and the cap retention groove 98 of the blade mount 78. When the cap cover 120 is fitted into the cap holder 119, the flange 125 locks into the engagement circumferential groove 121 and becomes integral, and the tip of the inner cylinder 126 loosely fits into the escape circumferential groove 122 of the cap holder 119. In this way, this cap block G is capped on the outer blade body 91, and the attachment/detachment protrusion 12
8 is fitted into the cap locking groove 98, the lower end surface of the cap holder 119 comes into contact with the upper end surface of the upper housing 2, and the inner surface of the lower end portion contacts the blade mount 78 externally. As shown in FIGS. 3 and 5, the battery cover block H consists of a battery cover 129 and a switch cover 130, and the battery cover 129 has a male screw 131 and a switch cover locking hole 132 formed on the circumferential surface of a cylindrical body. , battery spring support stand 133 on the top surface
A locking hole 134, 134'' and a shorting contact hole 135 are formed, and a positioning collar 136 is formed at the lower end.

The battery spring 137 has a spirally wound plate spring, and has a saw contact/mounting piece 18 bent and hanging from the lower surface, and has press-fit holding claws 139 protruding from both sides thereof to engage the mounting piece 138. It is attached to the battery cover 129 by press-fitting it into the stop hole 134 and holding the claw 139 to prevent it from coming out, while leaving the contact/attachment piece 138 protruding from the back side. A fixed contact plate 140 is positioned between the contact and mounting pieces 138 on the back side of the battery cover 129 and is held in the locking hole 134''.
0 is a conductive plate formed by punching, and a mounting piece 141 with claws.
and a contact 142 for the short-circuiting fitting are integrally formed, a mounting piece 141 with a claw is press-fitted into the locking hole 134'', and the contact 142 for the shorting fitting protrudes upward from the hole 1 for the shorting contact 35.Switch cover 130 is the collar 1 of the battery cover 129
A disc-shaped rotary knob 1 in the center of the bottom surface that touches the bottom surface of 36
43 protrudes, and the slide groove 1 is formed on the upper surface of the rotary knob 143.
44 and an elongated attachment hole 145, and a pair of battery cover locking protrusions 146 and click protrusions 147 that face each other with the elongated attachment hole 145 in between are formed on the upper surface.

The click spring body 148 has click spring protrusions 149 extending parallel to both sides of the rectangular body to provide spring properties due to resin elasticity outward, and switch handle locking holes are provided in the vertical direction on both sides of the click spring body 148. 150, and switch spring locking grooves 151 are formed in the vertical direction at both ends. The switch spring body 152 is made by punching and bending a plate-shaped body, and a switch spring 153 for an energizing spring is placed in the center.
The switch spring 154 that contacts the contact/mounting piece 138 is brought out by cutting and raising the switch spring 154 upward to give it springiness, and the switch spring 154 that contacts the contact/mounting piece 138 is brought out by bending the pieces on both sides downward to give it springiness, and the mounting pieces 155 at both ends are The mounting piece 155 is bent downward and hangs down, and press-fit holding claws 156 are formed on both sides of the mounting piece 155.
Press fit into the switch spring body 152 and hold it with the claw 156.
Attach to the click spring body 148. Furthermore, this click spring body 148 is positioned between the click protrusions 147 of the switch cover 130 and positioned in the guide groove 144, and the switch handle 157 is moved into the guide groove 144 of the rotation knob 143.
The click spring body locking protrusion 158 of the switch handle 157 is fitted into the switch handle locking hole 150 of the click spring body 148 through the elongated hole 145 so as to be integrated. In this way, the click spring body 148 that slides on the switch handle 157 slides, and the click spring protrusion 149 moves the click protrusion 147 to a predetermined sliding position.
When engaged, a click action is performed. When the switch cover 130 thus configured is exposed to the lower surface of the battery cover 129 and the battery cover locking protrusion 146 is fitted into the switch cover locking hole 132, both become integrated. At this time, the switch spring 154 faces the contact/mounting piece 138 of the battery spring 137, the switch spring 153 comes into contact with the fixed contact plate 140, and when the switch handle 157 is slid, the switch spring 154 is moved along with a jerking motion. The contact and mounting piece 138 move toward and away from each other, and the switch is operated at this point. When the battery cover block H assembled in this way is faced to the lower end opening of the lower housing 3 with its rotary knob 143, and the male thread 131 of the battery cover 129 is screwed into the female thread 25 formed on the mounting ring 12, It sinks into the lower end of the lower housing 3 and is closed without protruding from the lower end surface, and its collar 136 abuts against the receiving stage 10 of the lower housing 3.

At this time, the shorting fitting contact 142 protruding from the battery cover 129 comes into contact with the brim 22 of the shorting fitting 21, and the battery 16
It is electrically connected to the motor case of the motor 13 through the cathode of the battery spring 137, the switch spring 154, the fixed contact plate 140, the shorting fitting 21, and the current carrying fitting 38. Therefore, if the battery 16 is inserted into the motor cover 11 before the battery cover block H is attached, the battery power supply to the motor 13 is controlled on and off by operating the switch handle 157. The operation of this electric shaver is as follows. That is, when using a trimmer, when the knob 57 of the trimmer handle 46 is turned, the blade portion of the trimmer lever 7 hook F protrudes, and the drive pin 113 of the driver 108 engages with the drive rod 45, pushing up the coupling 69 and causing eccentricity. The engagement with the shaft 68 is disengaged. Then, operate the handle 157 and turn it on, and the battery 16 will power the motor 1.
3, the motor shaft 13a rotates, and the eccentric cam 72
As the drive rod 45 swings through it, the blade portion of the trimmer block F moves sharply, but the inner blade body 92 does not rotate. An external force that sinks the trimmer block F is prevented by the stopper engagement of the cam groove 62. Next, when using a normal razor, when the trimmer handle is rotated to retract the trimmer block F, the coupling 69 engages with the eccentric shaft 68. is disengaged from the drive rod 45.

Therefore, when the motor 13 is actuated by the switch handle 157, the coupling 69 rotates and the inner cutter body 92 rotates, and the beard introduced from the outer cutter hole is cut by cooperation with the inner cutter 102. Waste is collected in the waste storage chamber, while the drive rod 4
5 swings through an eccentric cam 72, but the trimmer block F
The blade part does not work. As described above, the trimmer device for an electric shaver of the present invention includes a trimmer handle, a trimmer lever having a cam groove formed in its intermediate portion and rotated by the operation of the trimmer handle, and a trimmer lever that engages with the cam groove of the trimmer lever. a trimmer block having a pin that reciprocates in and out as the trimmer lever rotates; and a center of the pin formed on a groove edge near an end of the cam groove where the pin is located when the trimmer block is in a protruding state. and a stopper projecting so that a line connecting the center of the pin and the tip in the projecting direction has an inclination angle in the direction in which the trimmer block projects with respect to a line connecting the center of rotation of the trimmer lever. Since a stopper is provided in the cam groove of the trimmer lever that drives the trimmer body, the trimmer block does not retract due to external force acting on the trimmer block, eliminating the need for a click spring to hold the trimmer lever, making manufacturing easier. This has the effect of making it easier.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an electric shaver to which an embodiment of the present invention is applied, Fig. 2 is an exploded perspective view of the electric shaver with the cap removed, Fig. 3 is an enlarged sectional view thereof, and Fig. 4 is an exploded perspective view of the entire shaver. Figure 5 is an exploded perspective view of the battery cover block, Figure 6 is a rear perspective view of the blade mount, Figure 7 is a perspective view of the trimmer base, and Figures 8 and 9 show the operating state of the trimmer lever. The plan view, FIGS. 10 and 11 are enlarged plan views of the cam groove, and FIG. 12 is a comparison diagram of the operation of the trimmer lever. 46...Trimmer handle, 47...Trimmer lever, 62...Cam groove, 62c...
... Stopper, F ... Trimmer block, 118.
...Base pin, P1-P5...Virtual line, 02
...Inclination angle.

Claims (1)

[Scope of Claims] 1. A trimmer lever having a trimmer handle, a trimmer lever having a cam groove formed in an intermediate portion thereof and rotated by operation of the trimmer handle, and a pin that engages with the cam groove of the trimmer lever to rotate the trimmer lever. a trimmer block that reciprocates and protrudes and retracts depending on the motion of the trimmer block; A trimmer device for an electric shaver, comprising a stopper protruding so that a line connecting the center of the pin and a tip in a protruding direction has an inclination angle in a direction in which the trimmer block protrudes with respect to a connecting line. 2. The electric shaver trimmer device according to claim 1, wherein the inclination angle of the stopper is 30 degrees.