WO2018223683A1 - Novel electric hair clipper - Google Patents

Abstract

A novel electric hair clipper, comprising a moving blade (2), a main housing (4), a driving rod (5), and a driven rod (6). The driving rod and the driven rod are hingedly connected to the moving blade and the main housing respectively, to form a planar four-bar mechanism that uses the driving rod and the driven rod as side links, the moving blade as a connecting rod and the main housing as a frame. The electric hair clipper further comprises a stationary blade (1), a spring (3), and a motor (7). The stationary blade is located at one end of the main housing, and is pressed against the stationary blade by the spring. The motor drives the driving rod to rotate. The electric hair clipper is power-saving and environment-friendly, and has low noise.

Description

A new type of electric hair clipper Technical field

The present invention relates to a novel electric hair clipper, and more particularly to an electric hair clipper structure of a non-reciprocating cutter head, belonging to the personal care product industry.

Background technique

At present, the electric hair clipper on the market can be divided into two structures, a motor drive and an electromagnetic drive, which are all in the form of a reciprocating cutter head.

Electromagnetically driven hair clippers are more cumbersome to use because they use alternating current, and the mass is large. The reciprocating motion of the cutter head also causes a problem of loud noise.

The motor-driven hair clipper is driven by the motor using a eccentric shaft riveted on the motor shaft to drive the card slot on the cutter head, so that the movable knife moves left and right, and the noise is very large, and the noise problem has always been an industry problem. From the analysis of the eccentric axis of the motor shaft and the movement path of the moving knife slot, we can see that the force of the eccentric shaft of the motor changes with its position, resulting in a variable force. The moving knife rotates within one cycle of the motor. Do the acceleration and deceleration, and then accelerate the deceleration. The inertial force of the moving knife is proportional to its mass and acceleration, so the reciprocating electric hair clipper is not only noisy, but also consumes a lot of energy. A large part of the energy output by the motor is used for doing nothing. Since the eccentric shaft of the motor is not stressed, the weight can not be used to achieve the balance of forces.

Summary of the invention

It is an object of the present invention to provide a relatively uniform speed cutter head structure that overcomes the deficiencies of the prior art.

To achieve the above object, the present invention adopts the following technical solutions:

A novel electric hair clipper comprises a movable knife (2), a main casing (4), an active rod (5), a driven rod (6), and the active rod (5) and the driven rod (6) respectively Each is hinged to the movable knife (2) and the main casing (4) to form a connecting rod with the active rod (5) and the driven rod (6), and the moving knife (2) is a connecting rod to the main housing. (4) is a plane four-bar mechanism of the frame, wherein the lengths L512 and L612 of the two connecting rods are equal, and the lengths L212 and L56 of the connecting rod and the frame are equal, so the planar four-bar mechanism is a parallelogram mechanism; Also included is a fixed knife (1), a spring (3), a motor (7), the fixed knife (1) is placed at one end of the main casing (4), and the moving knife (2) is subjected to a spring (3) Pressing firmly against the fixed knife (1), the motor (7) drives the active rod (5) to rotate. The movable knife (2) is provided with a right hinge hole (21) and a left hinge hole (22), and the active rod (5) is provided with an active rod front shaft (51) and a central hole (52), The driven rod (5) is provided with a driven rod front shaft (61) and a central shaft (62), and the housing (4) is provided with a housing hinge hole (42) and a motor mounting seat ( 41), the right hinge hole (21) is hinged with the active rod front axle (51), the left hinge hole (22) is hinged with the driven rod front axle (61), the central shaft (62) It is hinged to the housing hinge hole (42), and the center hole (52) is riveted to the motor shaft (71) of the motor (7) and is hinged to the housing (4) by the motor (7). The fixed knife (1) is provided with a spring mounting hole (11), the spring (3) is placed in the hole, and the fixed tooth (12) is fixed on the fixed knife (1), and the tooth height L12 is larger than The moving tooth height L23 on the knife (2) plus the length of the two connecting rods. The center of gravity (53) of the active rod (5) is located on the other side of the central bore (52) relative to the front axle (51) of the active rod. The utility model further comprises a second connecting rod (8), wherein the second connecting rod (8) is provided with a left hole (81) and a right hole (82), and the active rod (5) is further provided with an active rod rear axle (54), the driven rod (6) is further provided with a driven rod rear axle (63), the left hole (81) is hinged with the driven rod rear axle (63), the right hole ( 82) Hinged with the active lever rear axle (54). The parallelogram mechanism is a double drive structure, the double drive structure, the left active lever (501) is substituted for the driven rod (6), and the left motor (701) is placed on the housing (4) for the left motor installation. In the seat (43), the left active lever front axle (5011) on the left active lever (501) is hinged to the left hinge hole (22) on the movable knife (2), and the left active lever center on the left active lever (501) The hole (5012) is riveted to the left motor shaft (7011) on the left motor (701) and is hinged to the housing (4) by the motor (701). The center of gravity of the left active lever (501) is located on the other side of the left active lever center hole (5012) with respect to the left active lever front axle (5011). Also included is a second link (8), the active lever (5) is further provided with an active lever rear axle (54), and the left active lever (501) is further provided with a left active lever rear axle (5014) The left hole (81) is hinged to the left active lever rear axle (5014), and the right aperture (82) is hinged to the active lever rear axle (54). The sum of the lengths of the two connecting rods is less than the length of the frame and the connecting rod. The planar four-bar mechanism is a double crank mechanism, wherein the active rod (5) and the driven rod (6) are cranks, the movable knife (2) is a connecting rod, and the main casing (4) is a frame. When the length of the two cranks is not much different, it has little effect on the work of the mechanism.

The beneficial effect of the invention compared with the prior art is that a novel electric hair clipper of the present invention moves into the moving knife (2) and the fixed knife because the moving knife (2) is moved by the connecting rod in the parallelogram mechanism. (1) The hair between the teeth will be sheared, and its moving speed is basically constant, that is, the acceleration is basically zero, so its inertial force is also zero, so its motion is relatively stable. At the same time, the breeding block can be added to the two connecting rods to reduce the centrifugal force of the total moving parts. Therefore, a novel electric hair clipper of the present invention has energy-efficient performance. At the same time reduce noise and reduce vibration.

The invention is further described below in conjunction with the drawings and specific embodiments.

DRAWINGS

1 is a perspective structural view of an embodiment of a novel electric hair clipper of the present invention;

Figure 2 is a top plan view of an embodiment of a novel electric hair clipper of the present invention;

3 is a perspective exploded structural view of a novel electric hair clipper embodiment of the present invention;

4 is a perspective structural view of a fixed knife (1) of a novel electric hair clipper embodiment of the present invention;

Figure 5 is a top plan view of a fixed knife (1) of a novel electric hair clipper embodiment of the present invention;

Figure 6 is a perspective view of a movable knife (2) of a novel electric hair clipper embodiment of the present invention;

Figure 7 is a top plan view of a fixed knife (2) of a novel electric hair clipper embodiment of the present invention;

Figure 8 is a perspective view of the active rod (5) of a novel electric hair clipper embodiment of the present invention;

Figure 9 is a top plan view of the active rod (5) of a novel electric hair clipper embodiment of the present invention;

Figure 10 is a perspective view of a follower rod (6) of a novel electric hair clipper embodiment of the present invention;

Figure 11 is a top plan view of a follower rod (6) of a novel electric hair clipper embodiment of the present invention;

Figure 12 is a perspective structural view of a second embodiment of a novel electric hair clipper with a second link (8);

Figure 13 is a perspective structural view of a dual-drive source (motor) in another embodiment of a novel electric hair clipper of the present invention;

Figure 14 is a perspective structural view of a second drive (motor) having a second link (8) in another embodiment of a novel electric hair clipper of the present invention;

Figure 15 is a top plan view showing the position of the movable knife (2) in the embodiment of a novel electric hair clipper according to the present invention;

Figure 16 is a top plan view showing a position of the movable knife (2) driven by the motor (7) after being rotated through a 90° angle in the embodiment of the novel electric hair clipper of the present invention;

Figure 17 is a top plan view showing a position of the movable knife (2) driven by the motor (7) after being rotated through a 180° angle in the embodiment of the novel electric hair clipper of the present invention;

Figure 18 is a top plan view showing a position of the movable knife (2) driven by the motor (7) after being rotated by an angle of 270° in the embodiment of the novel electric hair clipper of the present invention;

Description of the reference numerals

1 fixed knife 11 spring seat

12 fixed teeth 2 moving knife

21 right hinge hole 22 left hinge hole

23 moving teeth 3 spring

4 main housing 41 motor mount

42 main housing hinge hole 43 left motor mount

5 Active lever 51 Active lever front axle

52 center hole 53 center of gravity

54 Active lever rear axle 501 Left active lever

5011 left active lever front axle 5012 left active lever central bore

5014 Left active lever rear front axle 6 follower lever

61 follower lever front axle 63 center shaft

7 motor 71 motor shaft

701 left motor 7011 left motor shaft

8 second link 81 left hole

82 right hole L12 fixed tooth height

L23 moving cutter tooth height L212 connecting rod length

L56 frame length L512 linkage (active rod) length

L612 link frame (slave rod) length

detailed description

In order to more fully understand the technical contents of the present invention, the following detailed description of the embodiments and the accompanying drawings (the drawings only show the structure of the present invention by a schematic diagram, the shape, the size, the ratio and the actual application are different) The technical solution is further described and illustrated, but is not limited thereto.

As shown in FIG. 1 to FIG. 11, the fixed knife 1 of the novel electric hair clipper of the present invention is fixed at one end of the casing 2, and the spring 3 mounted on the fixed knife presses the movable blade 2, so that the movable blade 2 can only be tight. Slide on the fixed knife 1 and not leave the fixed knife 1. The motor 7 drives the active lever 5 to rotate, because the active lever front axle 51 on the active lever 5 and the right hinge 21 hole on the movable knife 2 are hinged, the driven lever front axle 61 on the driven lever 6 and the movable knife 2 on the left The hinge holes 22 are hinged together, and the central shaft 62 on the driven rod 6 is hinged to the main housing hinge hole 42 on the main casing 4. Meanwhile, the distance L512 of the center hole of the active lever front axle 51 on the active lever 5 is equal to the distance L612 of the driven lever front axle 61 on the driven lever 6 to the central shaft 62; the left hinge hole 22 on the movable knife 2 is to the right The distance L212 of the hinge hole is equal to the distance L56 from the center of rotation of the motor 4 to the main housing hinge hole on the main casing 4. Therefore, when the motor 7 rotates, the movable blade 2 follows the translation.

As can be seen from Fig. 15 to Fig. 18, when the hair enters the fixed tooth 12, the passive tooth 23 is cut.

The movable knife 2 follows the active shaft front axle 51 on the translation and the active lever 5 at a constant speed, so the acceleration is zero, and the inertial force is also zero. Moreover, the reaction force received by the active lever front axle 51 is also substantially constant. When the center of gravity (53) of the active rod (5) is located on the other side of the center hole (52) relative to the front shaft (51) of the active rod, the centrifugal force of the active rod (5) itself is offset by the centrifugal force generated by the movable knife 2, At least the total centrifugal force can be reduced. The follower rod 6 can also take a similar approach to reduce the total centrifugal force. It should be noted that it is also within the scope of the present invention to additionally add a weight to the active lever.

Since the motor 7 is fixed to the main casing 4, the active rod 5 is riveted to the motor shaft 71, so that the active rod 5 is fixed in the axial direction of the center shaft, and only one degree of freedom is rotated around the central axis. The follower rod 6 may be limited in its axial direction by the main casing 4, or may have a fixed distance between the movable knife 2 and the main casing 4 to limit the degree of freedom of the central axis in the axial direction.

Figure 12 is a perspective structural view of a second embodiment of a novel electric hair clipper with a second link (8); the purpose is to enhance the stability of the planar quadrilateral mechanism. The second link 8 of the present embodiment is at the rear end. The degree of freedom of the second link 8 with respect to the axial direction is limited by a constant distance between the active rod 5 and the main housing. Generally, the length of the connecting rod corresponding to the second link 8 is greater than L512 and L612.

Figure 13 is a perspective structural view of a dual-drive source (motor) in another embodiment of a novel electric hair clipper of the present invention. Both the motor 7 and the left motor 701 are fixed to the main housing 4, and the active lever 5 and the left active lever 501 are riveted to the motor shafts of the motor 7 and the left motor 701, so that the active lever 5 and the left active lever 501 are opposite to the center thereof. The axial freedom of the hole is limited, with only one degree of freedom about its rotation. Due to the large number of plastic parts in the actual application, the dual motor drive makes the movement more stable. It is more convenient to reduce or eliminate the centrifugal force of the overall moving parts.

In summary, the beneficial effects of the present invention compared with the prior art are that the movable knife of the present invention has a smooth movement and a good hair cutting effect. Compared with the previous electric hair clipper, the electric hair clipper of the present invention has the effects of reducing wear and improving efficiency. And greatly reduce the noise generated in the work.

The above description is only for the purpose of further illustrating the technical content of the present invention in order to facilitate the understanding of the reader, but the embodiment of the present invention is not limited thereto, and any technology extension or re-creation according to the present invention is subject to Protection of the invention. For example, the left and right hinge holes on the movable knife are hinged with the shafts on the active rod, the driven rod and the left active rod, and can also be used as the left and right hinge shafts on the movable knife and the holes on the active rod, the driven rod and the left active rod. Hinged. In addition, if a transmission device such as a belt drive, a chain drive, or a gear transmission is added between the active lever and the driven lever, it is also within the protection scope of the present invention. The scope of the invention is defined by the claims.

Claims (10)

A novel electric hair clipper comprises a movable knife (2), a main casing (4), an active rod (5) and a driven rod (6), characterized in that: the active rod (5) and the driven rod (6) respectively hinged to the movable knife (2) and the main casing (4) to form a connecting rod with the active rod (5) and the driven rod (6) as the connecting rod, and the movable knife (2) as the connecting rod. The plane four-bar mechanism with the main casing (4) as a frame, wherein the lengths L512 and L612 of the two connecting rods are equal, and the lengths L212 and L56 of the connecting rod and the frame are equal, so the plane four-bar mechanism is Parallelogram mechanism; Also included is a fixed knife (1), a spring (3), and a motor (7), characterized in that: the fixed knife (1) is placed at one end of the main casing (4), and the moving knife (2) is subjected to The spring (3) is pressed against the fixed knife (1), and the motor (7) drives the active rod (5) to rotate. A novel electric hair clipper according to claim 1, characterized in that: the movable knife (2) is provided with a right hinge hole (21) and a left hinge hole (22), and the active rod (5) The active rod front axle (51) and the central hole (52) are disposed on the driven rod (6), and the driven rod front shaft (61) and the central shaft (62) are disposed on the main shaft The body (4) is provided with a housing hinge hole (42) and a motor mounting seat (41), the right hinge hole (21) is hinged with the active rod front shaft (51), and the left hinge hole (22) Hinged with the driven rod front axle (61), the central shaft (62) is hinged to the housing hinge hole (42), and the center hole (52) is riveted to the motor shaft (71) of the motor (7) It is hinged to the main housing (4) by a motor (7). A novel electric hair clipper according to claim 1, characterized in that: the fixed knife (1) is provided with a spring seat (11), and the spring (3) is placed in the seat, and the fixed knife (1) The upper cutter tooth height L12 is larger than the movable cutter tooth height L23 on the movable knife (2) plus the length of the two link rods. A novel electric hair clipper according to claim 1, characterized in that the center of gravity (53) of the active lever (5) is located on the other side of the central hole (52) with respect to the front axle (51) of the active lever . A novel electric hair clipper according to claim 1, further comprising a second link (8), said second link (8) being provided with a left hole (81) and a right hole ( 82), the active rod (5) is further provided with an active rod rear axle (54), the driven rod (6) is further provided with a driven rod rear axle (63), the left hole (81) ) is hinged to the follower shaft (63) of the follower lever, and the right hole (82) is hinged to the rear axle (54) of the active lever. A novel electric hair clipper according to claim 1, wherein said parallelogram mechanism is a double drive structure, said double drive structure, characterized in that a left active lever (501) is substituted for the follower lever ( 6), the left motor (701) is placed in the left motor mount (43) provided on the housing (4), and the left active lever front axle (5011) and the movable knife (2) on the left active lever (501) The left hinge hole (22) is hinged, and the left active rod center hole (5012) on the left active lever (501) is riveted to the left motor shaft (7011) on the left motor (701), through the motor (701) and the main housing Body (4) articulated. A novel electric hair clipper according to claim 6, wherein the center of gravity of the left active lever (501) is located at the center of the left active lever (5012) relative to the front axle of the left active lever (5011). One side. A novel electric hair clipper according to claim 6, further comprising a second link (8), said active lever (5) further provided with an active lever rear axle (54), said The left active lever (501) is further provided with a left active lever rear axle (5014), the left aperture (81) is hinged to the left active lever rear axle (5014), and the right aperture (82) is behind the active lever The shaft (54) is hinged. A novel electric hair clipper according to claim 1 wherein the sum of the lengths of the two links is less than the length of the frame and the link. A novel electric hair clipper according to claim 1, wherein said planar four-bar mechanism is a double crank mechanism, wherein the active lever (5) and the driven lever (6) are cranks and movable cutters (2) ) is the connecting rod, and the main casing (4) is a frame.

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