JP2006167244A - Electric hair clipper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric hair clipper with which defective cutting is eliminated by preventing floating up of a movable blade in the case of excessive load. <P>SOLUTION: A cutting blade unit 4 to be mounted in a head part of a main body case 1 comprises a fixed blade 8, a reciprocatingly driven movable blade 9; and a pressing spring 10 which presses and biases the movable blade 9. The movable blade 9 consists of a movable cutting blade 20 and a blade holder 21 fixed to the movable cutting blade 20 and receiving motor power. On the right and left of the top surface of the blade holder 21, a regulation protrusion 30 for regulating the movable blade 9 from floating away from a sliding surface with the fixed blade 8 is provided. At a case wall 6 opposing the protrusion 30, a guide groove 31 for receiving the protrusion 30 is recess-formed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric clipper having a structure in which a fixed blade and a movable blade are provided, and the movable blade is pressed and urged so as to be in close contact with the fixed blade by a spring.

  An example of this type of electric clipper is Patent Document 1. In this case, a cutting blade unit is detachably mounted on the head portion at the upper end of the main body case. The cutting blade unit includes a fixed blade that is fixed to the blade holder, a movable blade that is driven to reciprocate along the fixed blade, a pressing spring that urges the movable blade in close contact with the fixed blade, and the like. In a state in which the cutting blade unit is mounted on the head portion, a leaf spring fixed to the main body case engages with an engagement protrusion provided on the blade holder, and the cutting blade unit is fixedly held so as not to be separated.

Japanese Unexamined Patent Publication No. 2002-369882 (paragraph number 0023, FIG. 8)

  In a cutting blade unit in which the movable blade is pressed against the fixed blade by a holding spring, cutting failure may occur depending on the hair quality of the user. For example, in the case of a subject with hard hair quality or a subject with a very large amount of hair, the cutting load becomes excessive, and the movable blade floats away from the sliding surface with the fixed blade, causing a cutting failure such as tiger cutting. Prone to occur. When the spring pressure of the presser spring is increased, the floating separation of the movable blade can be suppressed to some extent, but the floating separation phenomenon itself cannot be solved. Furthermore, since the sliding resistance of the movable blade is increased by increasing the spring pressure, it is inevitable that the power loss of the motor increases correspondingly and the power efficiency decreases.

  An object of the present invention is to provide an electric clipper that can prevent a cutting defect reliably by preventing the movable blade from floating from the sliding surface with the fixed blade even when the cutting load on the cutting blade unit is large. It is in. An object of the present invention is to provide a high-efficiency electric hair clipper that can reliably prevent the movable blade from being lifted off without increasing the spring pressure of the holding spring, and therefore has little power loss.

  In the present invention, the cutting blade unit 4 is detachably attached to the head portion of the main body case 1, and the cutting blade unit 4 includes a fixed blade 8, a movable blade 9 that is driven to reciprocate along the fixed blade 8, In the electric clipper including the holding spring 10 that presses and urges the movable blade 9 against the fixed blade 8, at least one of the case wall 6 that covers the upper surface side of the cutting blade unit 4 and the surface facing the movable blade 9, A restriction projection 30 is provided for restricting the movable blade 9 from floating away from the sliding surface with the fixed blade 8.

  The movable blade 9 is composed of a movable cutting blade 20 and a blade holder 21 that is fixed to the movable cutting blade 20 and inherits the motor power. The movable blade 9 includes a blade holder 21 that is close to and faces the inclined surface 6a at the front end of the case wall 6. Regulating protrusions 30 are formed on the left and right sides of the upper surface.

  As the presser spring 10, a torsion coil shape including a coil portion 10 a and a pair of left and right spring arms 10 c continuously provided from the left and right ends of the coil portion 10 a is used, and the left and right spring arms 10 c are arranged on the upper surface of the blade holder 21. The right and left restricting protrusions 30 are respectively formed laterally outward from the left and right spring receiving portions 23. At that time, the left and right restricting protrusions 30 can be formed closer to the cutting edge than the left and right spring receiving portions 23, respectively.

  When the restriction projections 30 are formed on the left and right sides of the upper surface of the blade holder 21 of the movable blade 0, the guide grooves 31 for engaging and guiding the restriction projections 30 so as to be movable left and right are formed on the inclined surface 6a at the front end of the case wall 6.

  As shown in FIG. 7, the holding spring 10 includes a coil portion 10 a and a pair of left and right spring arms 10 c that are extended from the left and right ends of the coil portion 10 a. 30 can be bent together.

  In the present invention, the restriction projection 30 is provided on at least one of the facing surface of the case wall 6 that covers the upper surface side of the cutting blade unit 4 and the movable blade 9, and the movable blade 9 is a sliding surface with the fixed blade 8. For example, when cutting hair with hard hair quality, even if the cutting load on the cutting blade unit 4 becomes excessive, the movable blade 9 is brought into close contact with the fixed blade 8 and is appropriate The hair can be cut easily, and the cutting defects unavoidable with the conventional electric clippers can be surely eliminated. Since the lifting of the movable blade 9 is restricted by the restricting projection 30, for example, the sliding resistance of the movable blade 9 is inevitable when the spring pressure of the holding spring 10 is increased to restrict the lifting of the movable blade 9. There is no increase, and the power efficiency of the motor 2 can be improved.

  If the movable cutting blade 20 and the blade holder 21 constitute the movable blade 9, and the restricting protrusions 30 are formed on the upper and left sides of the blade holder 21 that are close to and opposed to the inclined surface 6a at the front end of the case wall 6, it is possible to prevent lifting. Therefore, the regulating force can be applied to the left and right positions of the movable blade 9. Therefore, even if an excessive load occurs in any part of the cutting edge, the floating of the movable blade 9 can be more reliably regulated. Incidentally, when the restricting protrusion 30 is formed on the inclined surface 6a side, the position of the restricting force acting on the movable blade 9 in the laterally sliding state is not necessarily equal to the left and right. May float away.

  When the left and right restricting protrusions 30 are formed laterally outward from the spring receiving portions 23 provided on the left and right surfaces of the blade holder 21, the reaction force of the case wall 6 is applied to the side edge of the movable blade 9 via the restricting protrusion 30. It can be applied to the side. Therefore, even when the load becomes excessive, the movable blade 9 can be further pressed down and brought into close contact with the fixed blade 8, and hair cutting with the fixed blade 8 and the movable blade 9 can be performed appropriately.

  In addition, if the left and right restricting projections 30 are formed closer to the cutting edge than the left and right spring receiving portions 23, the reaction force of the case wall 6 near the cutting edge portion between the fixed blade 8 and the movable blade 9. The movable blade 9 can be prevented from being lifted more reliably, and the hair cutting by the fixed blade 8 and the movable blade 9 can be performed more appropriately.

  When the restricting protrusion 30 is engaged and guided by the guide groove 31 formed on the inclined surface 6a at the front end of the case wall 6 so as to be movable left and right, the movable blade 9 is prevented from meandering and always reciprocates in parallel. Further, since the movable blade 9 can also be controlled to swing in the front-rear direction due to an excessive load, the hair can always be properly sheared.

  When the restriction projection 30 is integrally bent near the protruding end of the spring arm 10c of the presser spring 10, the restriction projection 30 is not worn when used for a long period of time as compared with the case where the restriction projection 30 is formed on the blade holder 21. Therefore, the durability of the regulation protrusion 30 is improved.

(Example) FIG. 1 thru | or FIG. 6 shows the Example of the electric clipper which concerns on this invention. In FIG. 2, the electric clipper houses a motor 2, a secondary battery 3, and the like inside a main body case 1, and a cutting blade unit 4 is detachably attached to a head portion at the front of the case. A switch knob 5 for controlling the energization state of the motor 2 is provided on one side of the outer surface of the main body case 1.

  In FIG. 3, the main body case 1 is composed of an upper case 1a and a lower case 1b that are joined together in a lid-like manner, and a hood-like case wall 6 is formed on the front end of the upper case 1a. The cutting blade unit 4 is attached to the oblique opening portion of the case wall 6. The cutting blade unit 4 includes a fixed blade 8, a movable blade 9 that is driven to reciprocate along the fixed blade 8, and a pressing spring 10 that presses and urges the movable blade 9 against the fixed blade 8.

  1 and 6, the fixed blade 8 includes a blade holder 13 and a stainless steel fixed cutting blade 14 welded and fixed to the blade holder 13. The blade holder 13 is an inverted trapezoidal plastic molded product. The blade holder 13 has a support shaft 15 at the center of the lower end thereof, and has protrusions 16 protruding from the left and right of the upper surface. As shown in FIGS. 1 and 4, the support shaft portion 15 is inserted into and engaged with a bearing groove 17 provided in the lower case 1 b, and the engagement protrusion 16 is engaged and captured by a capture spring 18 fixed to the main body case 1. The fixed blade 8 can be integrated with the main body case 1.

  In FIG. 6, the movable blade 9 comprises a stainless steel movable cutting blade 20 and a blade holder 21 welded and fixed to the movable cutting blade 20, and engages with an eccentric cam shaft 26 described later at the center of the blade holder 21. A passive frame 22 is projected. On the left and right sides of the upper surface of the blade holder 21, spring receiving holes (spring receiving portions) 23 for connecting the spring arms 10c of the presser spring 10 are formed.

  The holding spring 10 is made of a metal wire material such as spring steel, and a pair of left and right coil portions 10a are bridged via a latching arm 10b, and spring arms 10c are connected from both sides of each coil portion 10a. It consists of a continuous torsion coil spring. A claw 10d that engages with the spring receiving hole 23 is bent at the tip of the spring arm 10c. The movable blade 9 is joined to the fixed blade 8, each coil portion 10 a is loaded on the holding frame of the blade holder 13, and the left and right spring arms are engaged with the retaining arm 10 b locked to the receiving wall of the blade holder 13. By engaging the claw 10 d of 10 c with the spring receiving hole 23, the movable blade 9 can be pressed against the fixed blade 8 and integrated.

  The movable blade 9 pressed against the fixed blade 8 by the holding spring 10 as described above can reciprocate in the left-right direction by the amount of the eccentric width of the eccentric cam shaft 26. The rotational power of the motor 2 is transmitted through an eccentric cam shaft 26 fixed to the output shaft, and is converted into left and right reciprocating power by an eccentric pin 27 fixed to the eccentric cam shaft 26 and a passive frame 22. .

  In the cutting blade unit 4 configured to press the movable blade 9 against the fixed blade 8 with the holding spring 10, for example, when cutting the hair of a subject with hard hair, the cutting load becomes excessive, and the movable blade 9 is fixed. There is a risk of causing a cutting failure due to floating away from the sliding surface with 8. In order to prevent such a cutting failure, the present invention is characterized in that a restriction projection 30 is provided on either the case wall 6 or the movable blade 9 that is close to each other in use.

  Specifically, as shown in FIGS. 1, 4, and 5, hemispherical restriction protrusions 30 are provided on the upper left and right sides of the blade holder 21, and the inclined surface 6 a at the front end of the case wall 6 facing the restriction protrusion 30. In this case, a guide groove 31 for engaging and guiding the restricting protrusion 30 so as to be movable in the left-right direction is formed in a recess. In order to effectively prevent the movable blade 9 from lifting, the left and right restricting projections 30 are positioned laterally outward from the left and right spring receiving holes 23, respectively, and are further cut from the left and right spring receiving holes 23, respectively. Formed close to the blade.

  When the restriction projection 30 on the blade holder 21 side is received by the case wall 6, the lifting operation of the movable blade 9 is reliably restricted by the case wall 6, and the cutting failure can be eliminated. Since the restricting protrusion 30 is guided by the guide groove 31, the movable blade 9 can always be moved in parallel. This means that the movable blade 9 can be surely prevented from meandering and the hair can always be sheared properly.

  FIG. 7 shows another embodiment of the present invention. In this case, the restricting protrusion 30 is integrally bent near the protruding end of the spring arm 10 c of the presser spring 10, and the guide surface 32 for receiving the restricting protrusion 30 is formed on the inner surface of the case wall 6. Since others are the same as the previous embodiment, the same members are denoted by the same reference numerals and description thereof is omitted. The same applies to the following embodiments.

  FIG. 8 shows another embodiment of the spring receiving portion 23. There, the tips of the pair of left and right spring arms 10c are bent sideways to form opposing claws 10d, and these claws 10d are received by an inverted L-shaped spring receiving portion 23 that is recessed in the blade holder 21. did.

  In the above embodiment, the regulation protrusion 30 is formed on the blade holder 21 side. However, the regulation protrusion 30 may be formed on the case wall 6 side. The spring receiving portion 23 does not need to be a through hole, and can be formed of a recessed seat that receives the claw 10d of the spring arm 10c. The holding spring 10 can be formed of a metal leaf spring or a compression coil spring. In either case, the left and right restricting projections 30 are laterally outward from the left and right spring receiving portions 23, respectively, and are also spring receivers. It is preferable to form each closer to the cutting edge than the portion 23. When the pressing spring 10 is formed by a compression coil spring, one end thereof is fixed to the case wall 6 and the other end is received by a spring receiving portion 23 formed of a circular recess.

It is the BB sectional view taken on the line in FIG. It is a top view of an electric clipper. It is a vertical side view of a clipper head. It is an internal top view of a clipper head. It is the sectional view on the AA line in FIG. It is an exploded plan view of a cutting blade unit. It is a vertical side view which shows another Example of a control protrusion. It is a principal part top view which shows another Example of a spring receiving part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body case 4 Cutting blade unit 6 Case wall 8 Fixed blade 9 Movable blade 10 Pressing spring 10a Pressing spring coil part 10c Pressing spring spring arm 20 Moving cutting blade 21 Blade holder 23 Spring receiving part 30 Control protrusion

Claims (6)

The cutting blade unit (4) is detachably attached to the head part of the main body case (1),
The cutting blade unit (4) presses and urges the fixed blade (8), the movable blade (9) reciprocated along the fixed blade (8), and the movable blade (9) against the fixed blade (8). A holding spring (10),
The movable blade (9) is a sliding surface with the fixed blade (8) on at least one of the facing surface of the case wall (6) covering the upper surface side of the cutting blade unit (4) and the movable blade (9). An electric clipper characterized in that a regulation protrusion (30) is provided for regulating floating from the container. The movable blade (9) is composed of a movable cutting blade (20) and a blade holder (21) that is fixed to the movable cutting blade (20) and inherits the motor power.
The electric clipper according to claim 1, wherein restriction protrusions (30) are formed on the left and right sides of the upper surface of the blade holder (21) facing and facing the inclined surface (6a) at the front end of the case wall (6). The holding spring (10) is a torsion coil type spring including a coil portion (10a) and a pair of left and right spring arms (10c) continuously provided from the left and right ends of the coil portion (10a).
The left and right spring arms (10c) are received by spring receiving portions (23) provided on the left and right surfaces of the blade holder (21),
The electric clipper according to claim 2, wherein the left and right restricting protrusions (30) are respectively formed laterally outward from the left and right spring receiving portions (23).   The electric clipper according to claim 3, wherein the left and right regulating projections (30) are formed closer to the cutting edge than the left and right spring receiving portions (23), respectively.   The electric clipper according to claim 2, wherein a guide groove (31) for engaging and guiding the restricting protrusion (30) so as to be laterally movable is formed on the inclined surface (6a) at the front end of the case wall (6). The presser spring (10) includes a coil part (10a) and a pair of left and right spring arms (10c) continuously provided from the left and right ends of the coil part (10a).
The electric clipper according to claim 1, wherein the restricting protrusion (30) is integrally bent near the protruding end of the spring arm (10c) of the holding spring (10).

Images