JPH0221827B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hair clipper comprising a driving part equipped with a driving body that is reciprocated in the longitudinal direction by a motor, and a cutting head equipped with a cutter and attachable to the driving part. The cutter disposed on the cutter head is connected to a locking slider, and the locking slider is locked to a locking portion provided on the driving body and connected to the driving body. The reciprocating motion of the driving body is transmitted to the cutter via a locking slider, and the cutter is given a reciprocating motion in the longitudinal direction.

BACKGROUND OF THE INVENTION In a hair clipper of the type mentioned above, which is known, for example, from Japanese Patent Publication No. 56-48196, the drive part has a cylindrical sleeve part which is inserted into a cylindrical receptacle in the hair clip head. The sleeve part of the drive part and the cylindrical receptacle of the cutter head are connected by a bayonet mechanism. Similarly, a bayonet mechanism is used to lock the driving body, which is reciprocated by the motor of the drive unit, and the locking member to which the cutter of the cutter head is connected. The end of the locking member is formed into a cylindrical shape,
The driver has a radially projecting projection, the driver has a sleeve part for receiving the cylindrical end of the locking member, and has an axial notch and a locking notch with an inclined surface. ing. When the cutter head is mounted on the drive part, the radial protrusion at the end of the locking member is introduced into the axial notch of the driver, and when the cutter head is rotated, the radial protrusion is inserted into the inclined surface of the locking notch. along the line to the locking point. As a result, when the cutter head and the drive part are connected by a bayonet mechanism, the locking member and the driver are also connected to each other by a bayonet mechanism.

Problems with the Prior Art A disadvantage of hair clippers of the type described above is that high dimensional accuracy is required of the components that are connected to each other. In other words, in known hair clippers, when the hair clipper is rotated until the hair clipper is fixed to the drive part by the bayonet mechanism, the locking member must also be reliably connected to the driver by the bayonet mechanism. For this purpose, a locking part of the bayonet mechanism between the cutter head and the drive part,
The angular position of the locking part of the bayonet mechanism between the locking member and the driver must be precisely given. If, due to manufacturing errors, the cutter head cannot be rotated to the correct angular position, there will not be a connection between the locking member and the driver that will provide a satisfactory transmission of the driving force.

SUMMARY OF THE INVENTION An object of the present invention is to enable the locking member and the driving body to be reliably connected when attaching the cutter head to the drive part, even if there are manufacturing errors in the hair cutter of the type mentioned at the beginning. It is.

Means for Solving the Problems The object of the present invention is to provide a hair clipper of the type mentioned at the beginning, in which the driving body has an auxiliary locking portion closer to the hair clip than the locking portion, and the auxiliary locking portion is formed by a first step which allows the driving body to drive the locking slide only in the direction opposite to the direction towards the cutter head, the locking slide being locked and the reciprocating movement of the driving body being prevented. The original locking part that allows the auxiliary locking part to be transmitted to the locking slider is formed by a second step connected to the bottom surface of the first step forming the auxiliary locking part. When the cutter head is attached to the drive part and the driving body is reciprocated, the locking slider that comes into contact with the stopper of the cutter head engages with the auxiliary locking part during the outward stroke when the driving body is first moved toward the cutter head. the locking slider is carried by the driving body during the return stroke in which the driving body is returned, and during the next forward stroke of the driving body, the locking slider disengages from the auxiliary locking portion and slides into the locking portion. It was resolved by this.

Effects of the Invention In the hair clipper of the present invention, the mass inertia of the locking slider is utilized to lock the locking slider to the driver. In other words, when the motor is turned on to cause the driving body to reciprocate after the cutter head is mounted on the drive part, the locking slider engages with the auxiliary locking part during the outward stroke when the driving member is first moved toward the cutter head. engage,
The locking slider is then carried away by the driving body during the return stroke when the driving body is returned, and during the next forward stroke of the driving body, the locking slider remains in the returned position due to its mass inertia, so that the entrainment relative to the locking slider is Due to the relative movement of the bodies, the locking slider slides from the auxiliary locking part into the actual locking part and is locked in this locking part. The configuration of the present invention ensures reliable locking even if the mutually locking components are manufactured with relatively large manufacturing tolerances, so that the manufacturing costs of the hair clip are significantly reduced compared to known hair clips. be done. Furthermore, in the hair clipper of the present invention, the locking slider and the driving body can be connected very easily. That is, simply by attaching the cutter head to the drive part and turning on the switch, the locking slider is always reliably connected to the driving body.

Embodiment A hair clipper consists of a drive unit 1 with a casing 2 and a clip head 4 with a clip. In the drawings, only the front portion of the drive unit 1 is shown. The driver 3 of the drive unit 1 is given a reciprocating movement in the longitudinal direction by a motor (not shown). (See Figures 9, 10 and 11).

A locking slider 6 is arranged on the cutter head 4 and can be moved back and forth in the longitudinal direction within the cutter head, and a cutter (not shown) is connected to the locking slider 6.

The cutter head 4 is constructed so that it can be attached to the drive section 1. For this purpose, the cutter head 4 can be inserted with the sleeve part 5 into the end of the drive part 1, rotated through 90 DEG and fixed onto the housing 2. Such fixing can be achieved, for example, using a known bayonet mechanism and is therefore omitted from the drawings.

The locking slide 6, which can be moved back and forth in the cutter head 4, has pawls 7, 8 which are bent towards each other in order to grip the driver 3. Since the driving body 3 is tapered toward the front, the pawls 7 and 8 are expanded by the driving body 3 when the cutter head 4 is mounted on the drive unit 1 (see FIG. 2).

FIG. 3 is a diagram showing the drive unit 1 of FIG. 2 in a position rotated by 90 degrees about the vertical axis. As can be seen from the drawing, the shape of the driver 3 is not rotationally symmetrical but flat, and an auxiliary locking part 9 and an actual locking part 10 are provided on the narrow sides facing each other. The auxiliary locking part 9 is formed by a first step that allows the driving body 3 to carry the locking slider 6 only in the direction opposite to the direction towards the cutter head 4, and is different from the original locking part. 10 is formed by a second step portion connected to the bottom surface of the first step portion forming the auxiliary locking portion 9. Therefore, the auxiliary locking portion 9 and the locking portion 10 form a two-step staircase shape. In the position shown in FIG. 3, the cutter head 4 is attached to the drive section 1 by a bayonet mechanism, so that the pawls 7 and 8 are automatically positioned in front of the auxiliary locking section 9. ing.

Then, when the motor for reciprocating the driving body 3 of the drive unit 1 is switched on, the driving body 3 moves forward in the first forward stroke towards the cutter head 4 until the pawls 7, 8 engage the auxiliary locking part 9. (See Figure 4). In this case, the locking slider 6 also comes into contact with a stopper 11 that defines the forwardmost position of the locking slider 6.

Next, in the return stroke in which the driving body 3 is returned, since the pawls 7 and 8 are locked in the auxiliary locking part 9, the locking slider 6 is also pulled back together (the fifth
(see figure).

Then, during the next outward stroke of the entraining body 3,
Since the locking slide 6 tends to remain in the retracted position due to its own mass inertia and the mass inertia of the cutter connected to this locking slider 6, only the driver 3 is responsible for the movement of the pawls 7, 8. move forward between That is, the pawls 7, 8 are disengaged from the auxiliary locking portion 9 and engage with the original locking portion 10 (see FIG. 6).

FIG. 7 shows a state in which the locking slider 6 and the driving body 3 are connected by the pawls 7, 8 and the original locking part 10, and the driving body 3 has reached the forwardmost position. The figure shows the driver 3 in its rearmost position. In FIG. 7, the locking slider 6 has a small distance 12 from the stopper 11 which defines the forwardmost position of the locking slider 6 in order to engage the locking slider 6 with the auxiliary locking part 9. . Therefore, in a state where the pawls 7 and 8 are locked to the original locking portion 10 and the locking slider 6 and the driving body 3 are connected,
The locking slider 6 can smoothly reciprocate. The effective stroke length is indicated at 13 in FIG.

[Brief explanation of drawings]

The drawings show one embodiment of the invention,
FIG. 1 is a longitudinal cross-sectional view showing the front part of the drive section of the hair clipper of the present invention and the cutter head located in front of the drive section 1, and FIG. 2 is a diagram showing the state in which the cutter head is attached to the drive section 1. Fig. 3 shows a state in which the driving part is rotated by 90 degrees with respect to the cutter head, Fig. 4 shows a state in which the locking slider is locked in the auxiliary locking part of the driving body, and Fig. 5 The figure shows the locking slider locked in the auxiliary locking part pulled back together with the driving body, and Figure 6 shows the locking slider locked in the original locking part. Figure 7 is a diagram showing a state in which the locking slider locked in the original locking part is moved to the forwardmost position by the driving body,
FIG. 8 is a diagram showing a state in which the locking slider locked in the original locking portion has been moved to the rearmost position by the driver, and FIG. 9 is a partially cross-sectional view of the cutter head of the present invention. 10 is a plan view of FIG. 9, and FIG. 11 is a cross-sectional view of FIG. 9. DESCRIPTION OF SYMBOLS 1... Drive part, 2... Casing, 3... Drive body, 4... Cut head, 5... Sleeve part, 6
... Locking slider, 7, 8 ... Pawl, 9 ... Auxiliary locking section, 10 ... Locking section, 11 ... Stopper, 1
2... Interval, 13... Effective stroke.

Claims (1)

[Claims] 1 A hair clipper consisting of a drive unit 1 equipped with a driving body 3 that is reciprocated in the longitudinal direction by a motor, and a cutter head 4 that is equipped with a cutter and can be attached to the drive unit 1, and is arranged in the cutter head 4. The cutter is connected to a locking slider 6, and this locking slider 6 is locked to a locking portion 10 provided on the driving body 3 and connected to the driving body 3, so that the driving body 3 reciprocates. In a type in which the movement is transmitted to the cutter via the locking slider 6 and the cutter is given reciprocating motion in the longitudinal direction, the driving body 3 has an auxiliary locking portion located closer to the cutter head 4 than the locking portion 10. 9, which auxiliary locking part 9 is formed by a first step which allows the driving body 3 to carry the locking slide 6 only in the direction opposite to the direction towards the cutter head 4. The original locking part 10 which allows the locking slider 6 to be locked and the reciprocating motion of the driving body 3 to be transmitted to the locking slider 6 is connected to the first locking part 9 forming the auxiliary locking part 9. When the cutter head 4 is attached to the drive part 1 and the driving body 3 is reciprocated, the driving body 3 first connects to the cutter head 4. During the outward stroke in which the cutter head 4 is moved forward, the locking slider 6 that has come into contact with the stopper 11 of the cutter head 4 engages with the auxiliary locking portion 9, and then during the return stroke in which the driving body 3 is returned, the locking slider 6 engages with the driving body. 3, and the locking slider 6 disengages from the auxiliary locking part 9 and slides into the locking part 10 during the next forward stroke of the driving body 3.