JPH06335575A - Shaver - Google Patents

Abstract

PURPOSE:To decrease strength of a turning angle control means of a head by providing a shaver with an elastic body whose relative position is varied in accordance with turning of a shaving head, and a head returning means having an engaging part engaged thereto. CONSTITUTION:On one control end wall of a frame bottom wall of a shaving head, a spring containing recessed part 41 is formed, and in its upper part, a spring receiving boss 42 is formed projectingly and integrally. Also, a torsion coil spring 43 being elastically deformable as an elastic body is attached by fitting a coil part to the spring receiving boss 42. Both free end parts 43a, 43b of the coil spring 43 pass through the lower end opening part of the spring containing recessed part 41 and are inserted into a slot 44. The slot 44 is formed in the direction being orthogonal to the longitudinal direction in a holder base 2a. One end and the other end of the slot 44 are used as engaging parts 44a, 44b, respectively, and to the engaging part 44a, one free end part 43a of the torsion coil spring 43 is engaged elastically, and to the engaging part 44b, the other free end part 43b of the torsion coil spring 43 is engaged elastically.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shaver having a swinging shaving head rotatably supported on an upper portion of a body case.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 64-56089 discloses a conventional electric shaver equipped with a swing type shaving head. The shaving head is unloaded, that is, an external force is not applied due to its own weight. Although the head is provided so as to stop in a posture in which the center line when viewed from the end face direction is vertical, there is no configuration for holding the shaving head at this stop position. The rotation range of the shaving head is regulated by the upper end of the tappet projecting from the main body case, and either end of the rotation range regulating groove formed at the end of the shaving head. This is done by turning the shaving head.

[0003]

Therefore, the shaving head can freely rotate within a predetermined angle range when carrying an electric razor. Therefore, a large load is applied to the tappet or the like that regulates the range of rotation of the shaving head when it is dropped, and therefore, it is necessary to increase the strength of the tappet or the like to withstand the large load.

When shaving, the shaving head is rotated by sliding the skin surface. At that time, for example, the skin surface is slid from below the jaw to the cheeks, and then the movement direction is reversed. When sliding down the chin, there is no special force to turn the shaving head apart from friction with the skin.
The shaving head does not follow the skin well.

Further, even when the electric razor is stored in the razor storage case, there is a problem that the shaving head freely swings due to its own weight, and the shaving head that fluctuates easily interferes with the storage operation.

An object of the present invention is to obtain an electric razor capable of reducing the strength of the turning angle restricting means of the shaving head and improving the conformability to the skin and the accommodability in the razor storage case. It is in.

[0007]

According to the present invention, a shaving head is disposed between a pair of support protrusions of a main body case so as to be rotatably supported by the support protrusions, and a rotation range of the head is provided. Is applied to the electric razor regulated within a predetermined angle range by the rotation angle regulation means.

In order to achieve the above object, an elastically deformable elastic body attached to one of the shaving head and the main body case, and a member provided on the other side to engage with the elastic body. And a head returning means for holding the shaving head at an initial position in an unloaded state by the elastic force of the elastic body.

[0009]

In the electric shaver constructed as described above, the relative positions of the elastic body and the engaging portion engaging with the elastic body change as the shaving head rotates. With this position change, the elastic body elastically deforms as the saving head moves away from the initial position, and the elastic force of the elastic body that increases accordingly acts in the direction of returning the shaving head to the initial position. Therefore, when the load on the shaving head disappears, the elastic body returns the shaving head to the initial position by the elastic force and holds the shaving head in that state.

Therefore, the elastic body which is elastically deformed as described above buffers the external force that tries to move the shaving head from the initial position and prevents the shaving head from freely wobbling when it is stored in the razor storage case. To do. Also, when the razor movement direction is reversed during shaving, the elastic force of the elastic body that acts in the direction to return the shaving head to the initial position is the force that quickly reverses the shaving head with respect to the previous direction. As a result, the shaving head's ability to follow the skin can be improved.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 6 except for FIG. 3 is a main body case having a vertically long rectangular parallelepiped shape that is small enough to be held by a hand.

The main body case 1 is provided with a front case 1a and a rear case 1b made of synthetic resin, which are connected to each other with their opening faces aligned with each other, and is covered with aluminum over the upper ends of the two cases 1a and 1b. It is provided with a head holder 2 made of Nume die cast. 2 is a screw for connecting the head holder 2, and 4 in FIGS. 4 to 6 is both front and rear cases 1.
The connecting screws 5 of a and 1b are screw receiving bosses.

As shown in FIG. 2, the head holder 2 is
It has a holder base 2a through which the screw 3 is passed, and a pair of support protrusions 2b which are connected to both ends of the holder base 2 at a right angle. Bearing metal 6 is attached to the inner surfaces of the upper ends of both support protrusions 2b. The upper surface of the holder base 2a is curved so as to be concave.

As shown in FIG. 2, in the main body case 1,
The motor 7 and the battery 8 are vertically arranged and installed in parallel with each other, and a printed wiring board (not shown) on which various electric parts are mounted is installed below them. A connection block 9 into which the screw 3 is screwed is fixed to the upper end of the motor 7.

An eccentric drive shaft 10 is fixed to the rotation shaft of the motor 7, and the shaft 10 has a large diameter shaft portion 10a eccentrically positioned from the rotation shaft and a small diameter shaft portion 10b coaxially connected to the upper end thereof. And have. The small-diameter shaft portion 10b is projected to the outside of the main body case 1 through the holder base 2a.

In FIGS. 1 to 6 except FIG. 3, reference numeral 21 denotes a shaving head, which is provided with a head frame 22.
As shown in FIG. 2, the head frame main body 23 made of aluminum die-casting and the frame bottom wall 24 made of synthetic resin connected to the main body 22 are formed. The head frame main body 23 covers and hides the frame bottom wall 24 except the lower surface thereof.
The inner blade drive member 25 is provided in the space between the frame and the bottom wall 24 of the frame.
Is built in.

The inner blade driving member 25 is made of a synthetic resin, and the frame bottom wall 24 has flexible deformable arms 25a which are provided at both ends in the longitudinal direction as shown in FIGS. By being fixed to the upper ends of the pair of standing end walls 24a, they are attached across these end walls 24a. In addition, 26 in FIG. 3 is an arm fixing component.

The central portion of the thick and hard base portion 25b between the arm portions 25a of the inner blade driving member 25 is exposed to the opening 23c provided in the central portion of the head frame main body 23 in the longitudinal direction. The inner blade unit 2 shown in FIG.
7 is detachably supported.

The unit 27 includes two inner blades 28 (only one of which is shown in FIG. 2) parallel to each other, a coil spring (not shown) for urging the inner blades 28 upward to give a predetermined blade pressure, and the like. Is equipped with. The inner blade body 28 includes a large number of inner blade plates arranged in parallel in the width direction of the main body case 1 at regular intervals. In addition, reference numeral 29 in FIG. 2 denotes a rubber seal packing that holds down the beard scraps.

An outer blade holder 32 made of a synthetic resin, to which an outer blade 31 is fixed, is attached to the head frame 22.
It is attached so that 7 can be hidden and it can be attached or detached. Outer blade 31
As shown in FIG. 1, it has two mutually parallel outer blade portions 31a having semicircular cross sections, and the inner blade bodies 28 are individually pressed against the inner surfaces of these outer blade portions 31a. .

The shaving head 21 having the above structure
The horizontal rotating shafts 33 projecting from the upper ends of both end walls 23a of the head frame main body 23 are respectively inserted into the bearing metal 6 of the holder base 2 so that the space between the pair of supporting protrusions 2b is increased. It is positioned and rotatably supported by these support protrusions 2b.

The lower surface of the shaving head 21 pivotally attached to the main body case 1 in this manner has the holder base 2
The base 2a is curved so as to be convex toward the lower side in correspondence with the concave shape of the base 2a.

As shown in FIGS. 3 to 6, the shaving head 21 is provided with a rotation angle restriction projection 35.
The projecting portion 35 is, for example, formed in one end in the longitudinal direction of the frame bottom wall 24 so as to integrally project downward from the central position in the thickness direction of the frame bottom wall 24 in the shape of a bar,
A first cam surface 35a and a second cam surface 35b that are inclined in opposite directions are formed at the lower end portion thereof. The rotation angle restricting protrusion 35 is inserted into the main body case 1 through openings 36 and 37 provided opposite to the main body case 1.

The opening 37 is formed by combining notches (not shown) provided in the upper end walls of the front and rear cases 1a and 1b, and the opening 36 is formed in the holder base 2a. These openings 36 and 37 extend in the thickness direction of the main body case 1. At both ends (not shown) of the opening 36 in the longitudinal direction (thickness direction of the main body case 1), the rotation angle regulating protrusion 3 is provided.
5, the protrusion 35 and the opening 36 form a rotation angle regulation unit that determines an angle range in which the shaving head 21 rotates.

As shown in FIG. 3, the inner blade driving member 2 is
In the lower surface of the central portion of the base portion 25b of FIG.
Are formed. The driven portion 37 is exposed in a rectangular hole 38 provided in the frame bottom wall 24 and is formed by a pair of parallel ribs extending in the thickness direction of the shaving head 21. The small diameter shaft portion 10b of the eccentric drive shaft 10 is inserted into the groove between these ribs.

Therefore, with the eccentric rotation of the small-diameter shaft portion 10b, the inner blade driving member 25 is reciprocally moved in the longitudinal direction (the width direction of the main body case 1) with the flexible deformation of the arm portion 25a thereof. The two inner blades 28 are also reciprocally moved together.

Frame bottom wall 2 of shaving head 21
2 to at least one standing end wall 24a of FIG.
As shown in FIG. 6, a spring accommodating recess 41 is formed. The recess 41 is opened to the outer surface of the one standing end wall 24a opposite to the other standing end wall 24a, and the lower end thereof is opened to the lower surface of the frame bottom wall 24. A spring receiving boss 42 is integrally projectingly provided on the upper part of the spring accommodating recess 41.

An elastically deformable torsion coil spring 43 as an elastic body is attached to the spring accommodating recess 41 by fitting the coil portion to the spring receiving boss 42. Both free ends 43a and 43b of the coil spring 43 are inserted into the elongated hole 44 through the lower end opening of the spring accommodating recess 41.

The elongated hole 44 is formed in the holder base 2a so as to extend in the direction orthogonal to the longitudinal direction (in other words, the thickness direction of the main body case 1). One end and the other end of the long hole 44 are used as engaging portions 44a and 44b, respectively,
One free end portion 43a of the torsion coil spring 43 is elastically engaged with the one engaging portion 44a, and the other engaging portion 44a.
The other free end portion 43b of the torsion coil spring 43 is elastically engaged with b.

The torsion coil spring 43 and the engaging portions 44a and 44b of the elongated hole 44 are in the initial positions when the shaving head 21 is unloaded, that is, in the case of this embodiment, as shown in FIGS. As shown in the drawing, a head returning means for holding the shaving head 21 in a position where the center line of the shaving head 21 is vertical when viewed from the side is formed. In addition,
As the torsion coil spring 43, one having a spring constant that allows the shaving head 21 to rotate due to the load received when the outer blade 31 comes into sliding contact with the user's skin is used.

Reference numeral 51 in the figure denotes a switch knob mounted on the front case 1a so as to be slidable in the vertical direction and for starting and stopping the motor 7 by its movement.

Reference numeral 52 denotes a head lock knob which is located above the switch knob 51 and is slidably attached to the front case 1a in the vertical direction. The head lock knob 52 has an interlocking protrusion 52a.
Is brought into contact with and separated from the first cam surface 35a of the rotation angle regulation protrusion 35, and the contact keeps the shaving head 21 in a state of being forcibly inclined forward through the rotation angle regulation protrusion 35. It has become.

Reference numeral 53 is a trimmer device mounted on the rear case 1b so as to be slidable in the vertical direction. The interlocking protrusion 53a included in the trimmer device 53 has a second cam surface 35b of the rotation angle regulating protrusion 35.
The shaving head 21 is forcibly held in the detent position in which the shaving head 21 is forcibly tilted rearward so as not to hinder the upward movement of the trimmer device 53 through the rotation angle regulation protrusion 35. There is. This trimmer device 5
The rotation of the shaving head 21 by 3 takes precedence over the rotation of the shaving head 21 by the head lock knob 52. The head lock knob 52 and the trimmer device 53 are irrelevant to the present invention and may be omitted.

The shaving head 21 of the electric razor having the above-mentioned structure is held in the initial position shown in FIG. 4 by the elastic force of the torsion coil spring 43 of the head returning means in the unloaded state. Shaving head 21 depending on the load received by sliding contact with the person's skin
Is rotated and tilted back as shown in FIG. 5 or tilted forward as shown in FIG.

When tilted backward as shown in FIG. 5, one end of the torsion coil spring 43 is caused by the side surface 41a on the rear case 1b side of the spring accommodating recess 41 according to the rotation of the shaving head 21 at that time. Since the portion 43a is pushed so as to come close to the other end portion 43b engaged with the locking portion 44b, the torsion coil spring 43 is further elastically deformed, and the increased elastic force is shaving backward. Head 21
Give to.

Therefore, when the load on the shaving head 21 due to the sliding contact with the skin disappears, the torsion coil spring 4
The shaving head 21 by the elastic force stored in 3
Is returned from the state shown in FIG. 5 to the initial position shown in FIG.

Similarly, when tilted forward as shown in FIG. 6, the side surface 41b of the spring housing concave portion 41 on the side of the front case 1b according to the rotation of the shaving head 21 causes the torsion coil spring 43 to move. Since the other end portion 43b is pushed so as to approach the one end portion 43a engaged with the locking portion 44a, the torsion coil spring 43 is further elastically deformed, and the increased elastic force is directed forward. Shaving head 21
Give to.

Therefore, when the load on the shaving head 21 due to the sliding contact with the skin disappears, the torsion coil spring 4
The shaving head 21 by the elastic force stored in 3
Is returned from the state shown in FIG. 6 to the initial position shown in FIG.

As described above, the shaving head 21 is automatically returned to the initial position after being rotated from the initial position. Therefore, for example, when sliding the skin surface from under the chin to the cheek and then reversing the moving direction and sliding the skin under the chin, a direction for returning the shaving head 21 to the initial position in addition to friction with the skin. The elastic force of the torsion coil spring 43 acting on the shaving head 2
Since 1 can be used as a force for quickly reversing the direction before that, the shaving head 21 can improve the followability to the skin.

Moreover, since the shaving head 21 is held in the initial position shown in FIG. 4 by the elastic force of the torsion coil spring 43, when the body case 1 is to be pressed substantially horizontally against the skin during shaving. In addition, the shaving head 21 is not preliminarily rotated by its own weight so that the outer blade 31 faces obliquely upward.

Therefore, for example, when the shaving head 21 bends the sideburns, there is no fear that the sideburns will be warped too short. In the case where the shaving head is rotated by its own weight in advance so that its outer blade faces obliquely upward, it is difficult to predict the range in which the outer blade portion hits as the shaving head rotates following the contact with the skin. Therefore, it is difficult to press the outer blade accurately to the desired position of the sideburns, and there is a possibility that the sideburns may be too short and warped.

Further, as described above, the torsion coil spring 43 is used.
Since the shaving head 21 is held at the initial position shown in FIG. 4 by the elastic force of, the torsion coil spring 43 can buffer the external force that tries to move the shaving head 21 from the initial position. Therefore, the load on the rotation angle regulation projection 35 that regulates the rotation range of the shaving head 21 together with the opening 36 at the time of dropping can be reduced, and even if the strength of the projection 35 is reduced, it may be damaged. Absent.

Further, as described above, the torsion coil spring 4
Since the shaving head 21 is held at the initial position shown in FIG. 4 by the elastic force of 3, the shaving head 21 freely staggers by its own weight when storing this electric razor in a razor storing case (not shown), and then stores it. It is prevented that the operation is hindered. Therefore, the electric razor can be easily stored in the razor storage case.

Moreover, as described above, the torsion coil spring 4 is used.
Since the shaving head 21 is held in the initial position shown in FIG. 4 by the elastic force of 3, the appearance of this electric razor can be improved.

In addition, as described above, the shaving head 2
The head returning means for holding 1 at the initial position is the torsion coil spring 43 and the engaging portions 44a, 44 composed of both ends of the elongated hole 44.
Since it is formed of b, its structure is simple.

The present invention is not limited to the above embodiment. For example, the initial position of the shaving head 21 may be the position shown in FIG. 5 or 4.

As a head returning means, a torsion coil spring 43 is attached to the main body case 1, and both end portions 43a and 43b thereof are attached to both end portions (engaging portions) of a long hole or a long groove provided with the shaving head 21. They may be formed by engaging them separately.

Further, in the head returning means, a leaf spring-shaped spring piece (elastic body) is provided so as to project on either one of the main body case 1 and the shaving head 21, and the other end of the spring piece is sandwiched. The shaving head 21 is provided with an engaging portion formed of a hole or a groove that is inserted so that
A configuration may be adopted in which the shaving head 21 is urged to return to the initial position by elastic deformation of the spring piece due to the rotation of.

[0049]

As described above in detail, according to the electric shaver of the present invention, the head returning means having the elastic body whose relative position changes according to the rotation of the shaving head and the engaging portion engaged with the elastic body. With such a configuration, the external force for moving the shaving head from the initial position can be buffered by the elastic body, so that it is possible to reduce the strength of the rotation angle restricting means of the shaving head. Then, it is possible to prevent the shaving head from freely wobbling when it is stored in the razor storage case, and it is possible to improve the storability in the razor storage case. Furthermore, when the direction of movement of the razor is reversed during shaving, the elastic force of the elastic body acts as a force to quickly reverse the shaving head to the previous direction, so the shaving head's ability to follow the skin Can be improved.

[Brief description of drawings]

FIG. 1 is a side view showing a configuration of an electric shaver according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line ZZ in FIG.

FIG. 3 is an exploded perspective view showing a partial structure of the shaving head according to the embodiment.

FIG. 4 is a vertical sectional side view of the electric razor according to the embodiment when the shaving head is at the initial position.

FIG. 5 is a vertical cross-sectional side view of the electric razor according to the embodiment when the shaving head is in the backward tilt position.

FIG. 6 is a vertical cross-sectional side view of the electric razor according to the embodiment when the shaving head is in the forward tilt position.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main body case, 2b ... Support protrusion, 21 ... Shaving head, 31 ... Outer blade, 31a ... Outer blade part, 33 ... Rotating shaft, 35 ... Rotation angle regulation projection (rotation angle regulation means), 36 ...
Opening (rotational angle control means), 41 ... Spring storage recess,
41a, 41b ... Side surfaces of spring accommodating recesses, 42 ... Spring receiving boss, 43 ... Torsion coil spring as elastic body (head returning means), 44 ... Long holes, 44a, 44b ... Engaging portions (head returning means) .

Claims (1)

[Claims] 1. A shaving head is disposed between a pair of support protrusions of a main body case to be rotatably supported by the support protrusions, and a rotation range of the head is predetermined by a rotation angle regulating means. In an electric shaver restricted to an angular range, an elastically deformable elastic body attached to one of the shaving head and the main body case, and an engaging portion provided on the other side and engaging with the elastic body. An electric shaver, characterized by comprising head returning means for holding the shaving head at an initial position in an unloaded state by the elastic force of the elastic body.