Reversing swing mechanism of electric shaver

Abstract

A reversing swing mechanism of an electric shaver comprises a support, a partition plate is arranged in the middle of the support, and an output hole is formed in the center of the partition plate. The motor assembly is fixed to the bottom of the partition plate, and an output shaft of the motor assembly penetrates through the output hole. Characterized in that; the double-layer eccentric wheel shaft is formed by vertically overlapping and connecting two eccentric wheel shafts, and the bottom of the double-layer eccentric wheel shaft is fixed on an output shaft of the motor assembly; the tool bit swinging assembly comprises two groups of swinging frames which are stacked up and down, the tool bit swinging assembly is arranged on the support in a swinging mode through a fixing shaft, the bottoms of the two groups of swinging frames are oppositely stacked, and the bottoms of the swinging frames are movably connected with the corresponding eccentric shafts on the double-layer eccentric wheel shaft; the two tool bit seats are detachably mounted on the tops of the swing frames in the tool bit swing assembly; the double-layer eccentric wheel shaft structure is used, the tool bits can swing left and right in a staggered mode, operation sound and power are more stable, the structure is simple, operation is convenient, stability is high, the service life is long, and cost is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric shavers, in particular to a reversing oscillation mechanism of an electric shaver BACKGROUND

[0002] With the continuous development of economy and the continuous progress of society, rich material consumer goods are provided, which creates good conditions for improving people's living standards and pursuing personalized life. The hairdressing appliance of small household appliances generally includes a motor assembly, a circuit board assembly, a machine body and a cutter head oscillation assembly. The cutter head oscillation assembly generally includes a fixed cutter holder assembly, a moving cutter transmission assembly and an oscillation holder assembly. When the main machine is turned on, the motor drives the oscillation holder assembly and the moving cutter assembly arranged on the oscillation holder assembly to oscillate left and right, and the cutter net can cut the beard extending into the cutter net when the moving cutter assembly oscillates back and forth at high speed, so as to achieve the purpose of shaving. In the current shaver, the cutter head oscillation assembly is mostly connected with the motor on the same axis. When the motor rotates and the cutter head oscillation assembly is not on the same axis, the main processing method is to change the angle through a complex helical gear or a bent thin wall structure for transmission after reversing. Although there are eccentric shafts on the market to drive the cutter head oscillation assembly to oscillate back and forth, the structure is complex, the service life is low, and the cutter head holder has no space for slight forward and backward oscillation of the cutter head, so that the blade is more attached to the user's face, increasing the sharpness of the blade to cut the beard. Therefore, the traditional electric shaver oscillation mechanism has the following deficiencies:

[0003] 1. When the motor assembly and the cutter head oscillation assembly are not on the same axis, the main processing method is to change the angle through a complex helical gear or a thin oscillation sheet structure for transmission after reversing. At present, the gear manufacturing is complex, the cost is high, and the stability is poor.

[0004] 2. During the process of changing the transmission angle of the helical gear, the assembly precision is high. When the helical gear and the two direction transmission matching degree are not high, the jamming phenomenon is easy to appear, which affects the transmission efficiency.

[0005] 3. The oscillation sheet structure requires a high height and a very thin thickness. It is difficult to be injection molded, the qualified rate is low, the process requirement is high, and the production cost is high.

[0006] 4. The service life of the oscillation sheet part is difficult to be reliably guaranteed when it is operated at high strength for a long time. The sheet has the risk of breaking when it oscillates left and right for a long time, which affects the service life of the product.

[0007] Another search, patent number CN201320527496.9 discloses a reciprocating electric shaver, including a holder, and a swing mechanism driving the holder to reciprocate. Its technical points lie in that the swing mechanism includes a fixed seat, a rotating rod hinged on the fixed seat, two parallel and opposite moving dials driven by the dial pin on the rotating rod, the dial is connected with the holder through the upper end and drives the holder to swing laterally, a swing rod hinged on the fixed seat and driving the rotating rod to rotate, and an eccentric shaft connected with the swing rod and converting the circular motion of the motor into lateral reciprocating motion. The swing mechanism has relatively complex structure, is not convenient for processing and assembling, and is prone to energy consumption, noise and damage due to multiple transmission links. SUMMARY

[0008] The present application mainly aims at the problems in the prior art, and provides a reversing swing mechanism of an electric shaver, which solves the transmission problem when the motor assembly and the shaver head swing assembly are not on the same axis and have different angles, uses a double-layer eccentric shaft structure, enables the shaver head to swing left and right alternately, avoids the shaver head swing assembly from being stuck, has a simple transmission structure, and is more stable in operation sound and power.

[0009] The technical scheme of the present application is as follows: a reversing swing mechanism of an electric shaver, comprising

[0010] a support, the middle part of which is provided with a partition plate, and the center of the partition plate is provided with an output hole;

[0011] a motor assembly, which is fixed at the bottom of the partition plate and the output shaft of which penetrates through the output hole;

[0012] characterized in that

[0013] a double-layer eccentric shaft, which is formed by two eccentric shafts connected with each other in a top-and-bottom manner, and the bottom of the double-layer eccentric shaft is fixed on the output shaft of the motor assembly;

[0014] a shaver head swing assembly, which comprises two groups of swing frames arranged in a top-and-bottom manner and used for realizing non-linear transmission, and is swingably arranged on the support through a fixing shaft, the bottom of the two groups of swing frames is relatively superposed, the bottom of each swing frame is movably connected with the corresponding eccentric shaft of the double-layer eccentric shaft, and thus the swing frame swings relative to the double-layer eccentric shaft;

[0015] two groups of shaver head seats, which are detachably installed on the top of each swing frame in the shaver head swing assembly.

[0016] Further, the shaver head swing assembly comprises a first swing frame and a second swing frame, the middle part of each swing frame is provided with a bearing for positioning the shaver head swing assembly, the corresponding support is provided with a positioning hole, and a fixing shaft is fixed with the positioning hole after penetrating through the bearing.

[0017] Further, the fixed shaft is provided with a separation sleeve in the middle of the two bearings to prevent the bearings of the first swing frame and the second swing frame from being too close.

[0018] Further, the movable connection is that the bottom of each swing frame is respectively provided with a driving groove, and each eccentric shaft pin of the corresponding double-layer eccentric shaft is respectively and slidably fixed in the driving groove of the corresponding swing frame, so that the motor assembly drives each swing frame to swing in opposite directions, at the same speed and with the same amplitude through the double-layer eccentric shaft.

[0019] Further, the detachable mounting is a clamping connection or a plug-in connection or a threaded connection; the double-layer eccentric shaft is an integral part.

[0020] Further, the bottom of the tool bit seat is provided with a fixed clamping groove, and the top of the corresponding swing frame is provided with a matched elastic clamping leg, so as to realize elastic clamping and fixing.

[0021] Further, the tool bit seat is arranged in the tool bit frame, the middle part of the tool bit frame is provided with two mounting cavities, the two sides of the mounting cavities are provided with fixed grooves, the middle part of the corresponding tool bit seat is transversely provided with a sliding hole, and a sliding shaft passes through the sliding hole and is fixed in the fixed groove.

[0022] Further, the front and rear outer walls of the tool bit seat are provided with sliding strips, the sliding strips and the inner walls of the mounting cavities abut against each other when the tool bit seat slides, so as to reduce friction and prevent the tool bit seat from rotating excessively.

[0023] Further, the top of the tool bit seat has a plug hole part, two swing shafts are plugged in after the connection head is clamped, and the number of tool frames is increased.

[0024] Finally, the lower part of the swing frame is in an L shape, and the middle and upper parts of the swing frame are forwardly bent to form an obtuse angle with the lower part.

[0025] Compared with the prior art, the application has the following advantages:

[0026] 1. The transmission problem of the motor assembly and the tool bit swing assembly is solved when they are not on the same axis and have different angles.

[0027] 2. The problems of jamming and chaotic sound caused by the use of complex helical gears for connection are avoided.

[0028] 3. The assembly is simple, the transmission is stable, the cost is low, the noise is small, and the energy is saved.

[0029] 4. The use of the double-layer eccentric shaft structure enables the tool bit to swing left and right alternately, and the running sound and power output are more stable.

[0030] The overall structure is more simple and reasonable, easy to assemble, and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a perspective view of an embodiment of the present application;

[0032] Figure 2 is a perspective view of an embodiment of the present application (from another angle);

[0033] Figure 3 is an exploded view of an embodiment of the present application;

[0034] Figure 4 is an exploded view of an embodiment of the present application (from another angle);

[0035] Figure 5 is a sectional view of the present application;

[0036] In the figure, 1 is a support, 2 is a partition, 3 is an output hole, 4 is a motor assembly, 5 is an output shaft, 6 is a double-layer eccentric shaft, 7 is a cutter head swing assembly, 8 is a cutter head holder, 9 is a cutter head seat, 10 is a fixing hole, 11 is a screw, 12 is a first swing holder, 13 is a second swing holder, 14 is a bearing, 15 is a positioning hole, 16 is a fixed shaft, 17 is a separation sleeve, 18 is a driving groove, 19 is a mounting cavity, 20 is a fixing groove, 21 is a sliding hole, 22 is a sliding shaft, 23 is a connecting head, 24 is a fixed clamping groove, 25 is an elastic clamping leg, 26 is a sliding strip, 27 is an eccentric shaft pin, 28 is a hole part, and 29 is a swing shaft. DETAILED DESCRIPTION

[0037] The embodiments of the present application will be further described in detail below with reference to the accompanying drawings and embodiments. The following embodiments are used to illustrate the present application, but cannot be used to limit the scope of the present application. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the purpose of describing the present application and simplifying the description, and therefore cannot be understood as limiting the device or element indicated to have a particular orientation, to be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] The present application will be further described in detail below in conjunction with the embodiments of the drawings.

[0040] As Figures 1 to 5 A reversing oscillation mechanism of an electric shaver, comprising a support 1, a partition 2 is arranged in the middle of the support 1, and an output hole 3 is arranged in the center of the partition 2; a motor assembly 4 is fixed on the bottom of the partition 2, and the output shaft 5 of the motor assembly 4 passes through the output hole 3; the partition 2 is provided with fixing holes 10 on the left and right sides of the output hole, and the motor assembly 4 is fixed on the partition 2 of the support by screws 11. The focus of the invention is that it has a double eccentric shaft 6, which is connected by stacking two eccentric shafts one above the other, and in this embodiment, the double eccentric shaft 6 is an integral part, which is convenient for assembly and production, and the bottom of the double eccentric shaft 6 is riveted and fixed on the output shaft 5 of the motor assembly 4; the head oscillation assembly 7 comprises two sets of upper and lower stacked oscillation frames for realizing non-linear transmission, which are swingably arranged on the support 1 through a fixed shaft, the bottoms of the two sets of oscillation frames are relatively superimposed, the bottoms of each oscillation frame are movably connected with the corresponding eccentric shaft on the double eccentric shaft 6, so as to relatively oscillate; two head seats 9 are detachably mounted on the top of each oscillation frame in the head oscillation assembly 7.

[0041] The knife head swing assembly 7 comprises a first swing frame 12 and a second swing frame 13, the lower part of the first swing frame 12 and the second swing frame 13 is L-shaped, the upper part of the swing frame is bent forward to form an obtuse angle with the lower part, the bottom of the two swing frames is relatively superimposed, the middle part of the first swing frame 12 and the second swing frame 13 is provided with a powder metallurgy bearing 14 for positioning the knife head swing frame assembly 7, the middle part of the corresponding support 1 is provided with a positioning hole 15, and a fixing shaft 16 is used for fixing the bearing 14 and the positioning hole 15 by penetrating the bearing 14. The fixing shaft 16 is provided with a separation sleeve 17 between the two bearings 14, so as to prevent the bearings 14 of the first swing frame 12 and the second swing frame 13 from being too close and affecting normal use. The bottom of the first swing frame 13 and the second swing frame 14 is respectively provided with a long strip waist hole shaped driving groove 18, and the corresponding eccentric shaft pins 27 of the double eccentric shaft 6 are respectively and slidably arranged in the driving grooves 18 at the bottom of the corresponding swing frames, so that the motor assembly 4 drives the first swing frame 13 and the second swing frame 14 to swing relative to each other through the double eccentric shaft 6, thereby realizing the function of the moving knife of the traditional shaver, cooperating with the outer cutter net to form a cutting system, and realizing shaving. Since the upper eccentric shaft pins of the upper eccentric wheel and the lower eccentric shaft pins of the lower eccentric wheel are oppositely arranged at 180 degrees on the radial straight line and keep the same distance from the center shaft, i.e., the output shaft 5, and the bottom driving grooves 18 of the superimposed swing frames are equal in width, the motor assembly can drive the swing frames to swing in opposite directions, at the same speed and with the same amplitude, so that the shaver feels more stable and comfortable during use.

[0042] Further, the cutter head frame 8 is provided with two parallel installation cavities 19 in the middle part, which have the same shape and size, and the two sides of the installation cavities 19 are provided with fixing grooves 20. The middle part of the corresponding cutter head seat 9 is transversely provided with a sliding hole 21, a sliding shaft 22 penetrates through the sliding hole 21 and is fixed in the fixing groove 20, and the cutter head seat 9 can slide left and right along the sliding shaft 22. In this way, the cutter head seat 9 has two upper and lower cutter head seats. The top of the cutter head seat 9 can be further provided with a jack 28, which usually has a jack, and a swing shaft 29 is installed in the jack for driving a cutter head. The jack 28 of the cutter head seat 9 is preferably provided with a connecting head 23, which also has a jack and a jack 28, and can be inserted into two swing shafts 29 for increasing the number of cutter heads. The bottom of the cutter head seat 9 is provided with a fixed clamping groove 24, and the top of the corresponding first swing frame 13 and second swing frame 14 is provided with an elastic clamping foot 25 matched therewith to realize elastic clamping and fixing. When the motor assembly 4 drives the first swing frame 13 and the second swing frame 14 to swing left and right in opposite directions, the cutter head seat 9 is also driven to swing left and right in opposite directions, thereby realizing the shaving process. The front and rear outer walls of the cutter head seat 9 are provided with sliding strips 26, which will be in contact with the inner walls of the installation cavities 19 of the cutter head frame 8 when the cutter head seat 9 swings left and right, preventing the cutter head seat 9 from swinging too much and reducing friction, improving flexibility, thereby increasing the service life of the cutter head seat 9.

[0043] The working principle is: the motor assembly 4 is fixed on the support 1 by screws, and when the motor assembly 4 rotates, it drives the double eccentric shaft 6 to rotate and in turn drives the first swing frame 12 and the second swing frame 13 to swing left and right, the powder metallurgy bearing 14 is arranged in the middle of the first swing frame 12 and the second swing frame 13, and the fixed shaft 16 is used for positioning the swing frame assembly, the elastic clamping feet 25 are arranged on the upper and lower cutter head seats, and the upper and lower cutter head seats slide left and right through the sliding shaft 22 to drive the moving cutter assembly to make rapid reciprocating motion and form a cutting system with the outer cutter net, the key is to use the first swing frame 12 and the second swing frame 13 to connect two rotating assemblies which are not on the same axis as the double eccentric shaft 6, when the motor assembly 4 rotates, it drives the double eccentric shaft 6 to connect with the cutter swing assembly 7 and in turn drives the moving cutter assembly to swing left and right, thereby realizing the shaving function.

Claims

1. A reversing swing mechanism for an electric shaver, comprising A bracket, with a partition plate in the middle, and an output hole in the center of the partition plate; a motor assembly fixed to the bottom of the partition plate, with an output shaft passing through the output hole; It is characterized by ； A double-layer eccentric shaft, formed by two eccentric shafts stacked and connected one above the other, with the bottom fixed to the output shaft of the motor assembly; A cutter head swing assembly includes two sets of swing frames stacked one above the other for achieving non-linear transmission, the swing frames being swingably mounted on a bracket via a fixed shaft, the bottoms of the two sets of swing frames being relatively stacked so that the bottoms of the respective swing frames are movably connected to the corresponding eccentric shafts on the double-layer eccentric wheel shafts, thereby swinging relative to each other; Two groups of cutter head seats are detachably mounted on the top of each swing frame in the cutter head swing assembly.

2. The reversing swing mechanism of the electric shaver according to claim 1, characterized in that The cutter head swing assembly includes a first swing frame and a second swing frame. A bearing is provided in the middle of the first swing frame and the second swing frame for positioning the cutter head swing frame assembly. A positioning hole is provided on the corresponding bracket, and a fixed shaft passes through the bearing and is fixed to the positioning hole.

3. The reversing swing mechanism of the electric shaver according to claim 2, characterized in that The fixed shaft is provided with a separation sleeve in the middle of the two bearings to prevent the bearings of the first swing frame and the second swing frame from being too close.

4. The reversing swing mechanism of the electric shaver according to claim 1, characterized in that The movable connection is that a driving groove is provided at the bottom of each swing frame, and each eccentric shaft pin of the corresponding double-layer eccentric wheel shaft can be slidably fixed in the driving groove at the bottom of the corresponding swing frame, so that the motor assembly drives each swing frame to swing in opposite directions, at the same speed and with the same amplitude through the double-layer eccentric wheel shaft.

5. The reversing swing mechanism of the electric shaver according to claim 1, characterized in that The detachable installation is a snap connection, a plug connection or a threaded connection; the double-layer eccentric wheel shaft adopts an integrated part.

6. The reversing swing mechanism of the electric shaver according to claim 5, characterized in that The bottom of the cutter head seat is provided with a fixed card slot, and the top of the corresponding swing frame is provided with an elastic card foot to match it, thereby achieving elastic card connection and fixation.

7. The reversing swing mechanism of the electric shaver according to claim 1, characterized in that The cutter head seat is inserted into the cutter head frame, and two installation cavities are provided in the middle of the cutter head frame. Fixed grooves are provided on both sides of the installation cavity. A sliding hole is provided horizontally in the middle part of the corresponding cutter head seat, and the sliding shaft passes through the sliding hole and is fixed in the fixed groove.

8. The reversing swing mechanism of the electric shaver according to claim 7, characterized in that Slide bars are provided on the front and rear outer walls of the cutter head seat. When the cutter head seat slides, the slide bars and the inner wall of the mounting cavity conflict with each other, reducing friction and preventing the cutter head seat from swinging excessively.

9. The reversing swing mechanism of an electric shaver according to claim 1, characterized in that The top of the tool head seat is provided with a socket portion, which is plugged with two swing shafts after the connector is clipped on, so as to increase the number of tool holders.

10. The reversing swing mechanism of an electric shaver according to any one of claims 1 to 9, characterized in that The lower part of the swing frame is L-shaped, and the upper part of the swing frame is bent forward to form an obtuse angle with the lower part.

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