Single-motor dual-bit mechanism for selective load and hair clipper

Abstract

The present application relates to the field of hair trimmer, disclose a kind of single motor chooses dual-head mechanism of one load and hair trimmer, it includes shell, razor head assembly, vice trimmer knife assembly and linkage assembly, razor head assembly includes shaving movable knife holder, shaving swing frame and floating drive, floating drive is floatingly connected on shaving swing frame by first elastic element, when vice trimmer knife assembly operates, vice trimmer knife assembly drives linkage assembly to rotate, drives floating drive to move down and removes the plug-in linkage with shaving movable knife holder, simultaneously, linkage of shaving swing frame is inserted into the linkage groove of vice trimmer knife assembly with linkage rod, to drive its separate operation, when vice trimmer knife assembly resets and stops operating, linkage assembly is automatically reset under the action of second elastic element, floating drive is inserted into shaving swing frame with plug-in again, restores shaving drive.The present application realizes the physical selection of power path by the lifting of floating drive, reduces the cost of motor procurement.

Description

Technical Field

[0001] This invention relates to the field of hair trimmer technology, and more specifically, to a dual-blade mechanism with a single motor and a single load selection, and a hair trimmer. Background Technology

[0002] To enhance functionality, reciprocating electric shavers typically include a secondary head—such as a sideburn trimmer, eyebrow trimmer, or nose hair trimmer—to trim hair on corresponding body parts. To control overall size and reduce production costs, the industry generally uses a single motor. Since the reciprocating head is the most frequently used head, the motor in existing shavers always operates in conjunction with it, while the secondary head only operates when the shaver is in use. However, to improve shaving efficiency, existing reciprocating electric shavers often incorporate at least two reciprocating heads at intervals. When the secondary head is in use, the motor drives both the secondary head and multiple reciprocating heads simultaneously. The motor must continuously withstand multiple cutting resistances, resulting in high power consumption, significant heat generation, loud vibration and noise, and reduced battery life. Furthermore, because the shaver head is also driven simultaneously when the secondary head is in use, a high-load motor is required, increasing costs. Summary of the Invention

[0003] To address at least one of the aforementioned problems, the present invention first provides a dual-blade mechanism with a single motor selecting a single load, comprising a housing, a shaver head assembly, a secondary trimmer assembly, and a linkage assembly. The shaver head assembly includes a shaving moving blade holder, a shaving oscillating frame, and a floating drive component. The shaving moving blade holder is slidably disposed on the top of the housing in a horizontal direction. The shaving oscillating frame and the floating drive component are both movably disposed within the housing. A drive motor is provided within the housing to drive the shaving oscillating frame to reciprocate. The floating drive component is floatingly connected to the top of the shaving moving blade holder in a vertical direction and oscillates synchronously with the shaving oscillating frame. The floating drive component is plugged into the shaving oscillating frame to drive the shaving oscillating frame to reciprocate and slide. The secondary trimmer assembly is slidably disposed on the outside of the housing, and the linkage assembly is movably connected to the housing. The auxiliary trimmer assembly and the floating drive are both in contact with the linkage assembly. The housing is provided with a secondary blade head operating position and a secondary blade head stationary position at intervals along the sliding direction of the auxiliary trimmer assembly. When an external force drives the auxiliary trimmer assembly to move from the secondary blade head stationary position to the secondary blade head operating position, the shaving swing frame is adapted to cooperate with the auxiliary trimmer assembly to drive the auxiliary trimmer assembly to operate. At the same time, the auxiliary trimmer assembly drives the linkage assembly to move, so that the linkage assembly drives the floating drive to move downward, disengaging from the shaving blade holder. When the auxiliary trimmer assembly is located at the secondary blade head stationary position, the shaving swing frame disengages from the auxiliary trimmer assembly, the linkage assembly automatically resets, and the floating drive automatically engages with the shaving swing frame.

[0004] Optionally, the shaver head assembly is provided in two sets at intervals, and the shaving swing arm in both sets of the shaver head assembly is connected to the drive motor. The drive motor drives the two shaving swing arms to drive the two shaving blade holders to perform reciprocating and alternating movements.

[0005] Optionally, the bottom of the shaving moving blade holder is provided with a driving groove for the floating drive component to be inserted. The opening of the driving groove near the floating drive component is provided with an outwardly expanding slope so that the floating drive component can be inserted into the driving groove when the shaving swing frame is in any position.

[0006] Optionally, a first elastic element is provided between the floating drive and the shaving swing frame, with both ends of the first elastic element abutting against the floating drive and the shaving swing frame respectively, and the first elastic element is adapted to drive the floating drive and the shaving moving blade holder to insert and connect.

[0007] Optionally, the auxiliary trimmer assembly includes a pusher plate assembly, a stationary blade, and an auxiliary moving blade assembly. The pusher plate assembly is slidably connected to the housing, the stationary blade is fixedly connected to the pusher plate assembly, and the auxiliary moving blade assembly is movably connected to the pusher plate assembly. The pusher plate assembly is adapted to drive the auxiliary moving blade assembly to move synchronously. The shaving swing frame is provided with a linkage lever, which moves synchronously with the shaving swing frame. The auxiliary moving blade assembly is provided with an auxiliary blade linkage groove suitable for the linkage lever to be inserted. When an external force drives the auxiliary trimmer assembly to move from the auxiliary blade head stationary position to the auxiliary blade head operating position, the linkage lever is adapted to be inserted into the auxiliary blade linkage groove to drive the auxiliary moving blade assembly to reciprocate relative to the stationary blade.

[0008] Optionally, the auxiliary moving tool assembly includes an auxiliary moving tool holder, a moving blade, and a swing rod. The auxiliary moving tool holder is slidably connected to the push plate assembly. The moving blade is connected to the auxiliary moving tool holder and moves synchronously. The swing rod is rotatably connected to the push plate assembly. The auxiliary tool linkage groove is opened at one end of the swing rod, and the other end of the swing rod is hinged to the auxiliary moving tool holder to drive the moving blade to reciprocate.

[0009] Optionally, the linkage assembly includes a linkage rod and a pressing column. The linkage rod is rotatably connected to the housing, and the pressing column is connected to the linkage rod and engages with the floating drive component. The end of the linkage rod away from the pressing column engages with the push plate assembly. When the auxiliary trimmer assembly moves from the stationary position of the auxiliary blade head to the operating position of the auxiliary blade head, the push plate assembly drives the linkage rod to rotate the pressing column. The pressing column is adapted to drive the floating drive component to move downward and disengage from the shaving swing frame.

[0010] Optionally, the push plate assembly is fixedly provided with a side wing plate, and the side wing plate is provided with a driving inclined surface. During the process of the push plate assembly moving from the stationary position of the secondary cutter head to the operating position of the secondary cutter head, the driving inclined surface is adapted to contact the side of the linkage rod away from the lower pressure column, so as to drive the linkage rod to rotate.

[0011] Optionally, the linkage assembly further includes a second elastic element located on the side of the linkage rod away from the lower pressure column. The housing is fixedly provided with an abutment block, and the two ends of the second elastic element abut against the abutment block and the linkage rod respectively. The housing is fixedly provided with a rotation blocking strip. When the push plate assembly moves from the secondary blade operating position to the secondary blade stationary position, the linkage actuating rod disengages from the secondary blade linkage groove. The second elastic element drives the linkage rod to rotate and reset towards the rotation blocking strip, and drives the linkage rod to abut against the rotation blocking strip to achieve a limit position. The lower pressure column is adapted to release the constraint force on the floating drive member, so that the floating drive member moves upward and is plugged into the shaving swing frame to achieve linkage.

[0012] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0013] 1. The drive motor continuously drives the shaving swing arm to oscillate back and forth. However, the vertical lifting and lowering of the floating drive component physically switches the power transmission path. When the secondary blade is working, the downward movement of the floating drive component does not stop the motor or cause it to idle. Instead, it cleverly switches the power source from vertically lifting the blade to horizontally inserting the secondary blade. This makes the same swing arm a dual-function power output platform, avoiding complex gear or electromagnetic clutch structures. It achieves selective distribution of mechanical power flow within a very small overall space. In addition, it avoids the multiple cutting resistances caused by driving multiple different functional blades at the same time. Therefore, there is no need to use a high-load, high-cost, high-torque motor. A motor with conventional performance can be used to meet the usage requirements. While ensuring functionality, it effectively reduces procurement costs and motor power consumption, thereby extending the product's single-charge usage time.

[0014] 2. The swing arm forms a variable proportional lever with the rotation fulcrum on the push plate assembly. The shaving swing arm usually requires a smaller swing amplitude (about 1-2mm) for shaving, while trimming sideburns requires a larger cutting stroke to cut hard hair. By precisely setting the lever arm ratio at both ends of the swing arm, the small input swing amplitude gain can be amplified to the ideal cutting swing amplitude required by the auxiliary blade holder, so that the single motor can perfectly adapt to the two completely different blade kinematic characteristics without changing its own output amplitude.

[0015] 3. When the push plate assembly reaches the secondary blade head operating position, the contact relationship between the side wing plate and the linkage rod will form a self-locking tendency, which will force the linkage rod to be restricted to the rotation limit position, thereby ensuring that the lower pressure column continuously and stably presses the floating drive component away from the shaver head. Even if the whole machine is subjected to strong vibration or external force accidental contact, the floating drive component will not bounce back to its original position, which reduces the risk of abnormal noise and wear of the shaver head due to loose connection when the secondary blade head is running from the mechanical source.

[0016] 4. When the push plate assembly reaches the secondary blade head operating position, the fixed rotating stop bar provides a physical hard limit zero point for the linkage. The second elastic element is only responsible for providing the rotational torque, ensuring that the linkage is hammered and locked to the same mechanical origin each time it resets. This makes the lifting height of the pressure column completely determined by the component size chain, eliminating the discrete error of the elastic element and ensuring that the floating drive component can still be accurately inserted after multiple switching, greatly improving the long-term reliability of the product. In addition, the pressure column also plays a blocking role at the corresponding position, preventing the floating drive component from moving upward due to external vibration and losing its cooperation with the shaving swing frame.

[0017] In addition, the present invention provides a hair trimmer, including a dual-blade mechanism with a single motor and a single load as described above.

[0018] Compared to existing technologies, the hair trimmer described in this invention has the same advantages as the aforementioned single-motor single-load dual-blade mechanism, which will not be repeated here. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the auxiliary trimmer shear assembly in a static state in an embodiment of the present invention;

[0020] Figure 2 This is a perspective sectional view of the auxiliary trimmer assembly in a static state in an embodiment of the present invention;

[0021] Figure 3 This is an exploded view of the single-motor, single-load-selection dual-blade mechanism in an embodiment of the present invention;

[0022] Figure 4 This is an exploded view of the shaver head assembly in an embodiment of the present invention;

[0023] Figure 5 This is a structural diagram of the shaving swing arm and floating drive component in an embodiment of the present invention;

[0024] Figure 6 This is a cross-sectional view of the shaving swing arm and floating drive component in an embodiment of the present invention;

[0025] Figure 7 The explosion of the auxiliary trimmer assembly in this embodiment of the invention. Figure 1 ;

[0026] Figure 8 The explosion of the auxiliary trimmer assembly in this embodiment of the invention. Figure 2 ;

[0027] Figure 9 The explosion of the auxiliary trimmer assembly in this embodiment of the invention. Figure 3 ;

[0028] Figure 10This is a perspective sectional view of the auxiliary trimmer scissors assembly in operation in an embodiment of the present invention;

[0029] Figure 11 This is a structural diagram of the auxiliary repair shears assembly in operation in an embodiment of the present invention;

[0030] Figure 12 This is a diagram of the snap-fit ​​structure of the auxiliary trimmer scissors assembly in an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Drive motor; 12. Drive eccentric shaft assembly; 13. Abutment block; 14. Rotation blocking strip; 2. Shaver head assembly; 21. Shaver moving blade holder; 211. Drive groove; 22. Shaver swing frame; 23. Floating drive component; 24. Hook plate; 25. Floating plate; 26. Floating column; 27. First elastic element; 28. Linkage actuation rod; 3. Secondary trimmer assembly; 31. Push plate assembly; 311. First push plate; 312. Second push plate; 313. Snap sleeve shaft; 314. Side wing plate; 32. Stationary blade; 33. Secondary moving blade assembly; 34. Secondary moving blade holder; 341. Pivoting notch; 35. Moving blade; 36. Swing rod; 361. Secondary blade linkage groove; 4. Linkage assembly; 41. Linkage connecting rod; 42. Downward pressing column; 43. Secondary elastic element. Detailed Implementation

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the following description is provided in conjunction with the accompanying drawings. Figure 1-12 This application will be described in further detail.

[0033] The accompanying drawings of this embodiment of the invention provide a coordinate system XYZ, where the positive direction of the X-axis represents the right, the negative direction of the X-axis represents the left, the positive direction of the Y-axis represents the front, the negative direction of the Y-axis represents the back, the positive direction of the Z-axis represents the top, and the negative direction of the Z-axis represents the bottom.

[0034] In a first aspect, embodiments of the present invention provide a single-motor, single-load-selection dual-blade mechanism, referring to... Figures 1 to 3The single-motor, single-load dual-blade mechanism includes a housing 1, a shaver head assembly 2, a secondary trimmer assembly 3, and a linkage assembly 4. The shaver head assembly 2 includes a shaving head holder 21, a shaving oscillating frame 22, and a floating drive component 23. The shaving head holder 21 is slidably mounted on the top of the housing 1 in a horizontal direction. The shaving oscillating frame 22 and the floating drive component 23 are both movably mounted within the housing 1, and the housing 1 houses a drive motor 11 that drives the shaving oscillating frame 22 to reciprocate in a horizontal direction. The floating drive component 23 is vertically floatingly connected to the top of the shaving head holder 21 and oscillates synchronously with the shaving oscillating frame 22. The floating drive component 23 is plugged into the shaving oscillating frame 22 to drive its reciprocating sliding motion. The secondary trimmer assembly 3 is slidably mounted on the outside of the housing 1 in a vertical direction. The linkage assembly 4 is movably connected to the housing 1, and both the secondary trimmer assembly 3 and the floating drive component 23 are in contact with the linkage assembly 4. The housing 1 has a secondary blade head operating position and a secondary blade head stationary position spaced apart along the sliding direction of the secondary trimmer assembly 3. When an external force drives the secondary trimmer assembly 3 from the secondary blade head stationary position to the secondary blade head operating position, the shaving swing frame 22 is adapted to cooperate with the secondary trimmer assembly 3, driving the secondary trimmer assembly 3 to operate; at the same time, the secondary trimmer assembly 3 drives the linkage component 4 to move, so that the linkage component 4 drives the floating drive component 23 to move downward, disengaging the connection with the shaving moving blade holder 21. When the secondary trimmer assembly 3 is in the secondary blade head stationary position, the shaving swing frame 22 is disengaged from the secondary trimmer assembly 3, the linkage component 4 automatically resets, and the floating drive component 23 automatically engages with the shaving swing frame 22.

[0035] In this invention, the drive motor 11 continuously drives the shaving swing arm 22 to perform continuous reciprocating oscillations. However, the power transmission path is physically switched on and off by the vertical lifting and lowering of the floating drive component 23. When the secondary blade is working, the downward movement of the floating drive component 23 does not stop the motor or allow it to idle. Instead, it cleverly switches the power source from vertically lifting the blade 35 to horizontally inserting the secondary blade, making the same swing arm a dual-function power output platform. This achieves selective distribution of mechanical power flow within a very small overall space. In addition, it avoids the multiple cutting resistances caused by simultaneously driving multiple different functional blades. Therefore, it eliminates the need for high-load, high-cost, high-torque motors and allows the use of conventional performance motors to meet the requirements. This effectively reduces procurement costs and motor power consumption while ensuring functionality, thereby extending the product's single-charge usage time. At the same time, it reduces mechanical vibration and noise caused by multiple cutting resistances, improving the user's operating comfort and grip when using the secondary blade.

[0036] Specifically, housing 1 includes an outer shell and an inner core frame. The outer shell is formed by splicing and fixing two half-shells together. The inner core frame is located inside the outer shell and is fixedly connected to the outer shell by screws. The drive motor 11 is mounted on the inner core frame, and a rechargeable battery and a circuit board are also mounted on the inner core frame. Both the drive motor 11 and the rechargeable battery are electrically connected to the circuit board.

[0037] Reference Figures 2 to 4 The shaver head assembly 2 has two sets spaced apart along the front-to-back direction, thereby improving shaving efficiency. Two stationary blades are fixedly mounted on the top of the housing, and each of the two moving blade holders 21 is connected to a moving blade. The moving blade holder 21 drives the corresponding moving blade to move synchronously, thus cooperating with the corresponding stationary blade to complete the shaving. The shaving oscillating arms 22 in both sets of shaver head assemblies 2 are connected to the drive motor 11. The drive motor 11 drives the two shaving oscillating arms 22 to drive the two moving blade holders 21 in a reciprocating alternating motion (i.e., when one shaving oscillating arm 22 moves to the left, the other shaving oscillating arm 22 moves to the right). This partially cancels out the inertial forces of the two shaving oscillating arms 22, effectively counteracting the inertial forces and vibrations generated by the two shaver head assemblies 2 during high-speed movement, resulting in smoother operation and lower noise.

[0038] The shaving oscillating frame 22 is made of a material with excellent fatigue resistance and toughness; in this embodiment, it is preferably made of spring steel. The shaving oscillating frame 22 has a W-shaped shape, and its two sides are bolted to the top of the inner core frame. Two shaving oscillating frames 22 are arranged at intervals along the front-to-back direction. A drive eccentric shaft assembly 12 is mounted on the motor shaft of the drive motor 11, and the drive eccentric shaft assembly 12 rotates synchronously with the motor shaft of the drive motor 11. The drive eccentric shaft assembly 12 includes two eccentric shafts that are fixedly connected vertically and symmetrically spaced. Each eccentric shaft is inserted into the middle position of one of the two shaving oscillating frames 22, thus driving the middle positions of the two shaving oscillating frames 22 to perform reciprocating alternating motion.

[0039] Reference Figures 2 to 6Each shaving swing arm 22 has two integrally formed hook plates 24 at the top of its central swing section, arranged symmetrically at intervals along the left-right direction. The floating drive component 23 includes an integrally formed floating plate 25 and a floating column 26, with the floating column 26 located on top of the floating plate 25. Two interlocking holes are spaced apart on the top of the floating plate 25, and the floating column 26 is located between these holes. The two hook plates 24 pass through the two interlocking holes and engage with the floating plate 25. The sides of the two hook plates 24 that are close to each other abut against the walls of the two interlocking holes that are close to each other, allowing the entire floating drive component 23 to swing synchronously left and right at the central position of the shaving swing arm 22, and preventing the floating plate 25 from being pulled off vertically. Furthermore, the bottom surface of the floating plate 25 is spaced apart from the locations of the hook plates 24 on the shaving swing arm 22, thus providing space for the floating drive component 23 to move vertically.

[0040] The top of the shaving swing arm 22 is integrally formed with a spring sleeve, which is located between two hook plates 24. The bottom of the floating plate 25 has a spring groove, located directly below the floating column 26. The spring sleeve is inserted into the spring groove. A first elastic element 27 is inserted into the spring sleeve; in this embodiment, the first elastic element 27 is preferably a spring, with the other end inserted into the spring groove. Both ends of the spring abut against the floating drive member 23 and the shaving swing arm 22, respectively, thereby driving the floating drive member 23 to maintain an upward tendency. When the floating drive member 23 rises to its limit position, the floating plate 25 is limited by the hook plates 24. At this time, the spring sleeve remains inserted in the spring groove, thus ensuring the stability of the first elastic element 27 after assembly. In another embodiment, the first elastic element 27 can be a wave-shaped spring sheet or rubber with elastic deformation capability.

[0041] Reference Figures 4 to 6 Each shaving shampoo holder 21 has a drive slot 211 at its bottom for the insertion of a floating column 26. This allows the floating column 26 to move synchronously left and right, reciprocating with the shaving oscillating frame 22, thus driving the shaving shampoo holder 21 to move left and right together. The drive slot 211 has an outwardly expanding ramp at its opening near the floating drive component 23. The drive slot 211 has outwardly expanding ramps in both directions of sliding of the shaving shampoo holder 21, resulting in a larger opening size. Due to the inertia of the drive motor 11, the shaving oscillating frame 22 may be at its left or right limit of travel or any intermediate position when it stops. The outwardly expanding ramp converts the single vertical linear motion of the floating column 26 upward into a horizontal guiding and corrective force on the shaving shampoo holder 21, forcing the shaving shampoo holder 21 to fine-tune its sliding to accommodate insertion. This provides the mechanism with full tolerance for random stop phases of the drive motor 11, improving the smoothness of reset after long-term use.

[0042] Reference Figure 2The auxiliary trimming scissor assembly 3 can be a sideburn trimmer assembly; an eyebrow trimmer assembly; a body hair trimmer assembly; or a hair trimmer assembly with other functions. In this embodiment, the auxiliary trimming scissor assembly 3 is preferably a sideburn trimmer assembly.

[0043] Reference Figures 2 to 8 The auxiliary trimmer assembly 3 is located on the rear side of the housing. The auxiliary trimmer assembly 3 includes a pusher plate assembly 31, a stationary blade 32, and an auxiliary moving blade assembly 33. The pusher plate assembly 31 is slidably connected to the housing in the vertical direction, and the stationary blade 32 is fixedly connected to the top of the pusher plate assembly 31 by screws. The auxiliary moving blade assembly 33 is movably connected to the pusher plate assembly 31, and the pusher plate assembly 31 is adapted to drive the auxiliary moving blade assembly 33 to move synchronously in the vertical direction. A linkage lever 28 is inserted and glued to the middle swing position of the shaving swing arm 22 near the pusher plate assembly 31. The linkage lever 28 moves synchronously with the corresponding shaving swing arm 22. The auxiliary blade assembly 33 is provided with an auxiliary blade linkage groove 361 suitable for the insertion of the linkage lever 28; when an external force drives the auxiliary trimmer assembly 3 to move from the auxiliary blade head stationary position to the auxiliary blade head operating position, the linkage lever 28 is suitable for being inserted into the auxiliary blade linkage groove 361 to drive the auxiliary blade assembly 33 to reciprocate relative to the stationary blade 32, thereby trimming the hair.

[0044] Reference Figures 7 to 9 The pusher plate assembly 31 includes a first pusher plate 311 and a second pusher plate 312. The first pusher plate 311 is entirely located on the rear side of the outer casing, and a vertical guide strip is integrally formed on the rear side of the outer casing. The side of the first pusher plate 311 near the outer casing has a vertical guide groove for inserting the vertical guide strip, allowing the first pusher plate 311 to slide stably in the vertical direction. The cross-section of the second pusher plate 312 resembles a lightning bolt symbol. A connecting opening is provided on the rear side of the outer casing, communicating with its own interior. The lower half of the second pusher plate 312 is inserted into the interior of the outer casing through the connecting opening, while the upper half of the second pusher plate 312 is located outside the rear side of the outer casing and connects with the first pusher plate 311 to achieve synchronous movement. The first pusher plate 311 and the second pusher plate 312 can be fixed by screws or by a snap-fit ​​structure. In this embodiment, the first pusher plate 311 and the second pusher plate 312 are preferably connected by a snap-fit ​​structure. The stationary blade 32 is installed on the top of the first pusher plate 311.

[0045] The auxiliary moving blade assembly 33 is located between the first push plate 311 and the second push plate 312, and a chamber for accommodating the auxiliary moving blade assembly 33 is provided between the first push plate 311 and the second push plate 312. The auxiliary moving blade assembly 33 includes an auxiliary moving blade holder 34, a moving blade 35, and a swing rod 36. The moving blade 35 is fixedly connected to the auxiliary moving blade holder 34 by bolts. The auxiliary moving blade assembly 33 is slidably connected to the first push plate 311 in the left-right direction. The moving blade 35 abuts against the stationary blade 32, and the auxiliary moving blade assembly 33 cuts the hair when it drives the moving blade 35 to move back and forth left and right. The second push plate 312 has a stepped locking sleeve shaft 313 integrally formed on the side near the first push plate 311. The swing rod 36 has a shaft hole that is rotatably sleeved on the locking sleeve shaft 313, which can both ensure the rotation of the swing rod 36 and allow the swing rod 36 to be locked and limited on the second push plate 312 in the axial direction of the locking sleeve shaft 313. The auxiliary blade holder 34 is located at the top of the swing arm 36. A pivot notch 341 is provided on the auxiliary blade holder 34. The top of the swing arm 36 is inserted into the pivot notch 341, forming a hinged connection with the auxiliary blade holder 34. Rotation of the swing arm 36 causes the auxiliary blade holder 34 to reciprocate left and right. A through-hole is provided on the second push plate 312 near the bottom of the swing arm 36. The bottom of the swing arm 36 passes through the through-hole and is located on the side of the second push plate 312 near the inner core frame. The auxiliary blade linkage groove 361 is located at the bottom of the swing arm 36 on the side of the second push plate 312 near the inner core frame. When the auxiliary trimmer assembly 3 is in the auxiliary blade head operating position, the linkage lever 28 is inserted from the top into the auxiliary blade linkage groove 361. Subsequently, the corresponding shaving swing arm 22 moves the linkage lever 28, which in turn drives the swing arm 36 to reciprocate.

[0046] The top of the secondary blade linkage groove 361 has outwardly inclined flared edges along the groove edges in both directions of movement along the linkage lever 28. Thus, even if the linkage lever 28 is at its left limit of travel and the swing lever 36 is at its right limit of travel, as long as the secondary trimmer assembly 3 moves to the secondary blade head operating position, the linkage lever 28 can automatically convert into a horizontal guiding and corrective force on the swing lever 36 through the contact of the flared edges, forcing the shaving blade holder 21 to make slight adjustments and slide to accommodate insertion.

[0047] Reference Figures 7 to 9In this embodiment, the straight-line distance from the center of the pivot hole of the swing rod 36 to the pivot notch 341 is L1; the straight-line distance from the center of the pivot hole of the swing rod 36 to the auxiliary blade linkage groove 361 is L2, where L1 < L2. This allows the lever arm to move further away, enabling the drive motor 11 to apply a smaller force to the swing rod 36, thus driving the auxiliary blade assembly 33 to overcome a larger damping force. This allows the drive motor 11 to be selected with a lower torque or power, reducing costs while ensuring the auxiliary blade maintains the same effect as before. In another embodiment, L1 > L2. Thus, by precisely setting the lever arm ratio at both ends of the swing rod 36, the small input swing amplitude gain can be amplified to the ideal shearing swing amplitude required by the auxiliary blade holder 34. This allows a single motor to perfectly adapt to the two distinctly different blade kinematic characteristics without changing its output amplitude, thereby enabling the auxiliary blade for trimming sideburns to have a larger shearing stroke to cut hard hair.

[0048] Combination Figure 2 Reference Figure 8 and Figure 9 Two sets of linkage components 4 are symmetrically spaced along the left and right directions to ensure that the floating drive component 23 is not easily jammed during its downward movement, and to ensure that the floating column 26 can completely disengage from the drive groove 211 of the shaving blade holder 21. The two sets of linkage components 4 have the same structure, and the following description uses the structure of one set of linkage components 4 as an example.

[0049] The linkage assembly 4 includes a linkage rod 41 and a pressing column 42. A rotating shaft is integrally formed on the side of the inner core frame near the second push plate 312, and the linkage rod 41 is rotatably sleeved on the rotating shaft. The pressing column 42 is inserted into the top end of the linkage rod 41 and is glued to the linkage rod 41. In other embodiments, the pressing column 42 can also be tightly fitted into the linkage rod 41. The pressing column 42 is located at the top of the floating plate 25 and abuts against the top of the floating plate 25. The end of the linkage rod 41 away from the pressing column 42 engages with the portion of the second push plate 312 inserted into the housing. When the auxiliary trimmer assembly 3 moves from the stationary position of the auxiliary blade head to the operating position of the auxiliary blade head, the second push plate 312 drives the linkage rod 41 to rotate, which in turn drives the pressing column 42 to rotate and press down, causing the floating drive plate to move down, so that the floating column 26 completely disengages from the drive groove 211 and is disconnected from the shaving swing frame 22, thereby preventing the shaving blade holder 21 from operating.

[0050] Reference Figures 8 to 11Specifically, the second push plate 312 has integrally formed side wing plates 314 on both its left and right sides. The two side wing plates 314 are symmetrically arranged and each cooperates with a link 41. Each of the two side wing plates 314 has a driving slope at its top, away from each other in the left-right direction. The link 41 has an arc surface adapted to the driving slope. During the movement of the second push plate 312 from the stationary position of the secondary shaver head to the operating position of the secondary shaver head, the driving slope will abut against the arc surface, thereby driving the link 41 to rotate downwards away from the other link 41. This causes the top of the link 41 to drive the pressing column 42 to press down the floating drive member 23. Simultaneously, the contact relationship between the side wing plates 314 and the link 41 will form a self-locking tendency, forcibly restricting the link 41 to its rotation limit position. This ensures that the pressing column 42 continuously and stably presses the floating drive member 23 away from the shaver head, and even if the entire machine is subjected to strong vibration or accidental external force, the floating drive member 23 will not bounce back to its original position.

[0051] The linkage assembly 4 also includes a second elastic element 43, which is located on the side of the linkage link 41 away from the lower pressure column 42, and on the side of the linkage link 41 away from another linkage link 41. An abutment block 13 is integrally formed on the side of the inner core frame near the second push plate 312. In this embodiment, the second elastic element 43 is preferably a spring, with both ends abutting against the abutment block 13 and the linkage link 41 respectively. During the movement of the second push plate 312 to the stationary position of the secondary blade head, the second elastic element 43 drives the linkage link 41 to automatically rotate and reset, releasing the constraint force on the floating drive member 23. Simultaneously, the first elastic element 27 drives the floating drive member 23 upward, thereby causing the floating column 26 to be re-inserted into the drive groove 211 and maintain an insertion linkage relationship with the shaving blade holder 21. To ensure the stability of the second elastic element 43 after assembly, columns fitted with the second elastic element 43 are fixedly provided on both the abutment block 13 and the linkage link 41. In another embodiment, the second elastic element 43 can be a wave-shaped or V-shaped spring sheet.

[0052] One side of the inner core frame where the abutment block 13 is located is also integrally formed with a rotating blocking strip 14. When the push plate assembly 31 moves from the secondary cutter head operating position to the secondary cutter head stationary position, the linkage lever 28 disengages from the secondary cutter linkage groove 361. The second elastic element 43 drives the linkage rod 41 to rotate and reset towards the rotating blocking strip 14, and drives the linkage rod 41 to abut against the rotating blocking strip 14 to achieve a limit. In this way, the fixed rotating blocking strip 14 provides a physical hard limit zero point for the linkage rod 41, and the second elastic element 43 is only responsible for providing rotational torque, ensuring that the linkage rod 41 is hammered and locked to the same mechanical origin every time it resets. This makes the lifting height of the lower pressure column 42 completely determined by the component size chain, eliminating the discrete error of the elastic element, and ensuring that the floating drive component 23 can still be accurately inserted after multiple switching, greatly improving the long-term reliability of the product.

[0053] Reference Figure 12 Preferably, the portion of the second push plate 312 inserted into the housing is provided with a first locking hole and a second locking hole spaced apart along the vertical direction, with the first locking hole located below the second locking hole. A stop post is integrally formed on the inner wall of the housing. When the auxiliary scissor assembly 3 is in the stationary position of the auxiliary cutter head, the stop post engages with the first locking hole. When the first push plate 311 is pushed upwards, the stop post overcomes the locking resistance with the first locking hole, thereby placing the auxiliary scissor assembly 3 in the auxiliary cutter head operating position. At this time, the stop post engages with the second locking hole, ensuring the stability of the auxiliary scissor assembly 3 in the auxiliary cutter head operating position.

[0054] The implementation principle of a single-motor-selective-load dual-blade mechanism in this application embodiment is as follows: the drive motor 11 continuously drives the shaving swing frame 22 to perform continuous reciprocating oscillation. During shaving, the auxiliary trimmer assembly 3 is in the stationary position of the auxiliary blade head, and the height of the stationary blade 32 is lower than the height of the stationary blade screen, so the stationary blade 32 will not interfere; the linkage lever 28 is not inserted into the auxiliary blade linkage slot 361, and only moves back and forth with the shaving swing frame 22, so the auxiliary trimmer assembly 3 does not operate; however, the floating column 26 is inserted into the drive slot 211 of the shaving moving blade holder 21 under the action of the first elastic element 27, so the shaving swing frame 22 only drives the shaving moving blade holder 21 to move back and forth.

[0055] When the auxiliary trimmer assembly 3 is needed, the first push plate 311 is pushed upwards, so that the entire auxiliary trimmer assembly 3 is in the auxiliary blade head operating position, and the height of the stationary blade 32 is higher than the height of the stationary blade screen. During this process, the side wing plate 314 drives the bottom of the linkage rod 41 to rotate outwards, so that the top of the linkage rod 41 drives the pressing column 42 to press down the floating drive member 23, so that the floating column 26 completely disengages from the drive groove 211 and is disconnected from the shaving swing frame 22, thereby preventing the shaving moving blade frame 21 from operating; at the same time, the linkage lever 28 will be inserted into the auxiliary blade linkage groove 361 from the top, and then the corresponding shaving swing frame 22 drives the linkage lever 28 to move, and the linkage lever 28 will drive the swing rod 36 to swing back and forth, so that the auxiliary trimmer assembly 3 can operate independently.

[0056] Secondly, another embodiment of the present invention provides a hair trimmer, including a single-motor single-load dual-blade mechanism of the first aspect.

[0057] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. In this disclosure, unless otherwise explicitly specified and limited, "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0058] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A double-blade mechanism for selecting a single load using a single motor, characterized in that: The device includes a housing (1), a shaver head assembly (2), a trimmer assembly (3), and a linkage assembly (4). The shaver head assembly (2) includes a shaving head holder (21), a shaving swing arm (22), and a floating drive component (23). The shaving head holder (21) is slidably disposed on the top of the housing (1) in a horizontal direction. The shaving swing arm (22) and the floating drive component (23) are both movably disposed within the housing (1). The housing (1) contains a device that drives the shaving swing arm (22) to move. The reciprocating drive motor (11) is connected to the top of the shaving blade holder (21) in a vertical direction and swings synchronously with the shaving swing frame (22). The floating drive component (23) is plugged into the shaving swing frame (22) to drive the shaving swing frame (22) to slide back and forth. The auxiliary trimmer assembly (3) is slidably disposed on the outside of the housing (1). The linkage assembly (4) is movably connected to the housing (1). Both component (3) and the floating drive component (23) are in contact with the linkage component (4). The housing (1) is provided with a secondary blade operating position and a secondary blade stationary position at intervals along the sliding direction of the secondary trimmer assembly (3). When an external force drives the secondary trimmer assembly (3) to move from the secondary blade stationary position to the secondary blade operating position, the shaving swing bracket (22) is adapted to cooperate with the secondary trimmer assembly (3) to drive the secondary trimmer assembly (3) to operate. At the same time, the secondary trimmer... The blade assembly (3) drives the linkage assembly (4) to move, so that the linkage assembly (4) drives the floating drive (23) to move down, and disengages from the shaving moving blade holder (21); when the auxiliary trimmer assembly (3) is in the stationary position of the auxiliary blade head, the shaving swing frame (22) and the auxiliary trimmer assembly (3) are disengaged, the linkage assembly (4) automatically resets, and the floating drive (23) automatically engages with the shaving swing frame (22).

2. The single-motor, single-load-selective double-blade mechanism according to claim 1, characterized in that: The shaver head assembly (2) is provided in two sets at intervals. The shaving swing arm (22) in the two sets of shaver head assemblies (2) is connected to the drive motor (11). The drive motor (11) drives the two shaving swing arms (22) to drive the two shaving blade holders (21) to perform reciprocating and alternating movements.

3. The single-motor, single-load-selective double-blade mechanism according to claim 1, characterized in that: The bottom of the shaving moving blade holder (21) is provided with a drive groove (211) for the floating drive member (23) to be inserted. The drive groove (211) has an outwardly expanding slope at the groove opening near the floating drive member (23) so that the floating drive member (23) can be inserted into the drive groove (211) when the shaving swing holder (22) is in any position.

4. The single-motor, single-load-selective double-blade mechanism according to claim 1, characterized in that: A first elastic element (27) is provided between the floating drive (23) and the shaving swing frame (22). The two ends of the first elastic element (27) abut against the floating drive (23) and the shaving swing frame (22) respectively. The first elastic element (27) is adapted to drive the floating drive (23) to be inserted into the shaving blade holder (21).

5. The single-motor, single-load-selective double-blade mechanism according to any one of claims 1-4, characterized in that: The auxiliary trimmer assembly (3) includes a push plate assembly (31), a stationary blade (32), and an auxiliary moving blade assembly (33). The push plate assembly (31) is slidably connected to the housing (1), the stationary blade (32) is fixedly connected to the push plate assembly (31), and the auxiliary moving blade assembly (33) is movably connected to the push plate assembly (31). The push plate assembly (31) is adapted to drive the auxiliary moving blade assembly (33) to move synchronously. The shaving swing arm (22) is provided with a linkage lever (28). The moving lever (28) moves synchronously with the shaving swing frame (22). The auxiliary moving blade assembly (33) is provided with an auxiliary blade linkage groove (361) suitable for the insertion of the linkage lever (28). When an external force drives the auxiliary trimmer assembly (3) to move from the stationary position of the auxiliary blade head to the operating position of the auxiliary blade head, the linkage lever (28) is suitable for being inserted into the auxiliary blade linkage groove (361) to drive the auxiliary moving blade assembly (33) to reciprocate relative to the stationary blade (32).

6. The single-motor, single-load-selective double-blade mechanism according to claim 5, characterized in that: The auxiliary moving blade assembly (33) includes an auxiliary moving blade holder (34), a moving blade (35), and a swing rod (36). The auxiliary moving blade holder (34) is slidably connected to the push plate assembly (31). The moving blade (35) is connected to the auxiliary moving blade holder (34) and moves synchronously. The swing rod (36) is rotatably connected to the push plate assembly (31). The auxiliary blade linkage groove (361) is opened at one end of the swing rod (36). The other end of the swing rod (36) is hinged to the auxiliary moving blade holder (34) to drive the auxiliary moving blade holder (34) to drive the moving blade (35) to reciprocate.

7. The single-motor, single-load-selective double-blade mechanism according to claim 5, characterized in that: The linkage assembly (4) includes a linkage link (41) and a pressing column (42). The linkage link (41) is rotatably connected to the housing (1). The pressing column (42) is connected to the linkage link (41) and is in contact with the floating drive (23). The end of the linkage link (41) away from the pressing column (42) is in contact with the push plate assembly (31). When the auxiliary trimmer assembly (3) moves from the stationary position of the auxiliary blade head to the operating position of the auxiliary blade head, the push plate assembly (31) drives the linkage link (41) to rotate the pressing column (42). The pressing column (42) is adapted to drive the floating drive (23) to move downward and disengage from the shaving swing frame (22).

8. The single-motor, single-load-selective double-blade mechanism according to claim 7, characterized in that: The push plate assembly (31) is fixedly provided with a side wing plate (314), and the side wing plate (314) is provided with a driving inclined surface. During the process of the push plate assembly (31) moving from the stationary position of the auxiliary cutter head to the operating position of the auxiliary cutter head, the driving inclined surface is adapted to contact the side of the linkage rod (41) away from the lower pressure column (42) so as to drive the linkage rod (41) to rotate.

9. The single-motor, single-load-selective double-blade mechanism according to claim 7, characterized in that: The linkage assembly (4) further includes a second elastic element (43), which is located on the side of the linkage link (41) away from the lower pressure column (42). The housing (1) is fixedly provided with an abutment block (13). The two ends of the second elastic element (43) abut against the abutment block (13) and the linkage link (41) respectively. The housing (1) is fixedly provided with a rotation blocking strip (14). When the push plate assembly (31) moves from the secondary cutter head operating position to the secondary cutter head stationary position... The linkage lever (28) disengages from the secondary blade linkage groove (361), and the second elastic element (43) drives the linkage link (41) to rotate and reset towards the direction of the rotation blocking bar (14), and drives the linkage link (41) to abut against the rotation blocking bar (14) to achieve a limit position; the pressing column (42) is adapted to release the constraint force on the floating drive member (23) so that the floating drive member (23) moves upward and is plugged into the shaving swing frame (22) to achieve linkage.

10. A hair trimmer, characterized in that, Includes the single-motor, single-load-selective dual-blade mechanism as described in any one of claims 1-9.

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