A pressure-sensitive hair trimmer

Abstract

This utility model provides a pressure-sensitive hair trimmer, including a blade head, a housing, a pressure gauge, and a linear motor. The blade head includes a moving blade assembly, a fixed blade, and a fixed base. The fixed blade is fixedly connected to the fixed base, and the moving blade assembly is connected to the fixed base and reciprocates. The linear motor includes a mover, a stator, and a drive shaft. The mover is positioned above the stator and performs alternating reciprocating motion under the magnetic action of the stator. One end of the drive shaft is connected to the moving blade assembly, and the other end is connected to the mover. The drive shaft transmits the movement of the mover to the moving blade assembly, causing it to reciprocate. The pressure gauge is fixedly mounted on the housing, adjacent to the mover, and can sense different pressure values. When the reciprocating motion of the moving blade assembly is obstructed, the pressure gauge detects a decrease in pressure, and the power is increased to make the moving blade assembly overcome the resistance and reciprocate. When the pressure gauge detects that the pressure has returned to a predetermined value, the power returns to a normal preset value. Intelligent power adjustment is achieved through the pressure value changes detected by the pressure gauge.

Description

Technical Field

[0001] This utility model relates to hair trimming tools, specifically a hair trimmer with pressure sensing. Background Technology

[0002] In the field of hair trimming, traditional trimming tools mostly use rotary motors to drive the blade movement. These motors achieve the reciprocating motion of the blade through the rotation of an eccentric shaft, but they have the following shortcomings: First, the movement path is constant and cannot be flexibly adjusted according to the actual situation, resulting in wasted resources; second, the rotary motor generates relatively large noise and vibration during operation, affecting the user experience; third, when the blade encounters resistance, it cannot automatically adjust the power, which can easily obstruct the movement of the blade, affecting the trimming effect and potentially damaging the motor, while also generating significant noise during operation. Utility Model Content

[0003] (1) Technical problems to be solved

[0004] This invention provides a hair trimmer with pressure sensing, which aims to solve the problems of automatically detecting and adjusting power when the blade encounters resistance and reducing the working noise and vibration of the hair trimmer motor.

[0005] (2) Technical solution

[0006] This utility model provides a hair trimmer with pressure sensing, including a blade head, a housing, a pressure gauge and a linear motor. The blade head includes a moving blade assembly, a fixed blade and a fixed base. The fixed blade is fixedly connected to the fixed base. The moving blade assembly is connected to the fixed base and reciprocates. The linear motor includes a moving element, a stator and a drive shaft. The moving element is disposed above the stator and performs alternating reciprocating motion under the magnetic action of the stator.

[0007] One end of the drive shaft is connected to the moving blade assembly, and the other end is connected to the moving element. The drive shaft transmits the movement of the moving element to the moving blade assembly, causing the moving blade assembly to reciprocate. The pressure gauge is fixedly mounted on the housing and close to the moving element, and can sense different pressure values. When the reciprocating motion of the moving blade assembly is obstructed, the pressure gauge detects a decrease in pressure, and the power is increased to make the moving blade assembly overcome the resistance and reciprocate. When the pressure gauge detects that the pressure has returned to a predetermined value, the power is restored to a normal preset value.

[0008] Furthermore, at least one side of the actuator is provided with an elastic element, and the pressure gauge is adjacent to the elastic element.

[0009] Furthermore, a buffer is provided between the elastic element and the pressure gauge, and the three always remain in contact.

[0010] Furthermore, the mover includes a connecting frame, a magnetic yoke, and a magnet assembly that works in conjunction with the stator. The connecting frame is fixedly connected to the magnetic yoke, and at least one of the connecting frames is provided with the drive shaft, which passes through the connecting frame and the magnetic yoke and is fixedly connected to the magnetic yoke.

[0011] Furthermore, the linear motor includes a bracket, which includes a first fixed frame and a second fixed frame. The first fixed frame and the second fixed frame are detachably connected, enclosing the stator and the mover within the space formed by the first fixed frame and the second fixed frame.

[0012] Furthermore, the connecting frame includes a bending portion, one end of the elastic element is fixedly connected to the bending portion, and the other end is connected to the bracket.

[0013] Furthermore, it also includes a limiting component, which includes a limiting member and a limiting rod. The limiting member has a through hole in the middle. One end of the limiting rod is inserted into the through hole, and the other end is inserted into the bracket. The limiting member also has connecting holes on both sides. The limiting member is rotatably connected to the magnetic yoke by fasteners passing through the connecting holes and the connecting frame.

[0014] Furthermore, the moving blade assembly includes a moving blade and a moving blade holder, the moving blade and the moving blade holder are fixedly connected, the moving blade holder is provided with a drive groove, and the transmission shaft is inserted into the drive groove to drive the moving blade to reciprocate.

[0015] Furthermore, the top of the moving blade holder is provided with a slot, and the fixed base is provided with a torsion spring, which presses against the slot.

[0016] Furthermore, the moving blade assembly also includes a swing arm, one end of which is connected to the moving blade holder and the other end of which is connected to the fixed base.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. A pressure gauge is installed between the mover and the stator. The pressure gauge detects changes in pressure value. When the cutter assembly is obstructed, the pressure decreases and the power is automatically increased to enable the moving cutter assembly to overcome the resistance. When the operation is normal, the power is restored, realizing intelligent power regulation, improving the user experience and greatly saving energy.

[0019] 2. A linear motor is used to drive the reciprocating motion of the moving blade assembly. Compared with the traditional rotary motor, its transmission shaft can swing back and forth, and the swing amplitude can be limited and adjusted according to the actual situation. It saves energy and electricity, and only increases power when the blade head is damaged. Under normal conditions, it restores the preset power, thus avoiding waste of resources. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is an exploded view of the overall structure of this utility model.

[0022] Figure 3 This is a schematic diagram showing the connection between the linear motor and the cutter head of this utility model.

[0023] Figure 4 This is a schematic diagram showing the connection between the pressure gauge and the elastic element of this utility model.

[0024] Figure 5 This is a front sectional view of an embodiment of the present invention.

[0025] Figure 6 This is a front sectional view of the linear motor of this utility model.

[0026] Figure 7 This is an exploded view of the linear motor of this utility model.

[0027] Figure 8 This is an exploded view of the limiting component of this utility model.

[0028] Figure 9 This is a schematic diagram of the cutter head structure of this utility model. Figure 1 .

[0029] Figure 10 This is a schematic diagram of the cutter head structure of this utility model. Figure 2 .

[0030] Figure 11 This is an exploded view of the cutter head structure of this utility model.

[0031] Reference numerals: 1-Cutter head, 11-Moving cutter assembly, 111-Moving cutter, 112-Moving cutter holder, 1121-Drive slot, 1122-Slot, 113-Torsion spring, 114-Swing arm, 12-Fixed cutter, 13-Fixed base, 2-Outer shell, 21-Shell one, 22-Shell two, 3-Linear motor, 31-Movers, 311-Connecting frame, 3111-Bending part, 312-Magnetic yoke, 32-Stator, 321- Iron core, 322-coil, 323-wire frame, 33-elastic component one, 34-magnet assembly, 341-magnet one, 342-magnet two, 35-drive shaft, 36-bracket, 361-fixed bracket one, 362-fixed bracket two, 37-buffer, 38-elastic component two, 39-pressure gauge, 4-limiting assembly, 41-limiting component, 411-through hole, 412-connecting hole, 42-limiting rod, 43-fastener. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0033] like Figure 1-11 As shown, this utility model provides a hair trimmer with pressure sensing, including a blade head 1, a housing 2, a pressure gauge 39, and a linear motor 3. The blade head 1 includes a moving blade assembly 11, a fixed blade 12, and a fixed base 13. The fixed blade 12 is fixedly connected to the fixed base 13. The moving blade assembly 11 is connected to the fixed base 13 and can be driven by the linear motor 3 to perform reciprocating motion. The linear motor 3 includes a mover 31, a stator 32, and a drive shaft 35. The mover 31 is disposed above the stator 32 and can perform alternating reciprocating motion under the magnetic action of the stator 32. The stator 32 drives the mover 31 without contact, reducing the operating noise of the motor.

[0034] One end of the drive shaft 35 is connected to the moving blade assembly 11, and the other end is connected to the mover 31. The drive shaft 35 transmits the movement of the mover 31 to the moving blade assembly 11, causing the moving blade assembly 11 to reciprocate. The pressure gauge 39 is fixedly mounted on the housing 2 and is close to the mover 31, and can sense different pressure values. In use, when the reciprocating motion of the moving blade assembly 11 is obstructed, the pressure gauge 39 measures a decrease in pressure, and increases the power to make the moving blade assembly 11 overcome the resistance and reciprocate. When the moving blade assembly 11 moves normally, the power returns to the normal preset value. In the prior art, a rotary circular motor is used, which rotates according to the eccentric shaft, and the path remains constant. This design results in a great waste of resources. In contrast, this application uses a linear motor 3 that reciprocates under the action of the drive shaft 35. It has a limited swing amplitude, and the swing distance can be adjusted and modified to a certain extent according to the current situation. This design saves energy and electricity, and only processes power when the cutter head 1 is damaged. When the pressure detection is normal, the power returns to normal.

[0035] Specifically, such as Figure 3-5 As shown, at least one side of the mover 31 is provided with an elastic element 33, and the pressure gauge 39 is fixedly connected to the housing 2 and adjacent to the elastic element 33. The pressure gauge 39, the housing 2 and the stator 32 are fixed together and remain stationary relative to the mover 31 when they move.

[0036] Specifically, such as Figure 5 As shown, a buffer 37 is also provided between the elastic element 33 and the pressure gauge 39. The three are always in contact. By designing the buffer 37, the direct physical contact between the pressure gauge 39 and the elastic element 33 is isolated, reducing the mechanical damage to the pressure gauge 39 caused by vibration, impact, friction and wear. At the same time, the noise generated by the direct contact between the elastic element 33 and the pressure gauge 39 is too large. The design of the buffer 37 can also reduce the noise.

[0037] like Figure 7-8 As shown, there are two movers 31. The stator 32 drives the two movers 31 to move back and forth alternately. The two movers 31 are arranged side by side with a gap to prevent them from rubbing against each other during the reciprocating motion. In addition, the double mover 31 structure design adopted in this embodiment makes the linear motor 3 move more smoothly.

[0038] Multiple elastic elements 33 may be provided. In this embodiment, four elastic elements 33 are provided, and multiple pressure gauges 39 may also be provided.

[0039] Specifically, such as Figure 8 As shown, the mover 31 includes a connecting frame 311, a magnetic yoke 312, and a magnet assembly 34 that cooperates with the stator 32. The connecting frame 311 is fixedly connected to the magnetic yoke 312. At least one of the connecting frames 311 is provided with a drive shaft 35. The drive shaft 35 passes through the connecting frame 311 and the magnetic yoke 312 and is fixedly connected to the magnetic yoke 312. In the prior art, the drive shaft 35 is directly fixedly connected to the connecting frame 311, and the drive shaft 35 is indirectly driven by the magnetic yoke 312 driving the connecting frame 311 to move. However, in this design, the drive shaft 35 is directly fixedly connected to the magnetic yoke 312, and the movement of the magnetic yoke 312 directly drives the movement of the drive shaft 35. This results in higher movement accuracy and a more stable overall connection. The drive shaft 35 will not fail to move due to loosening of the connection between the connecting frame 311 and the magnetic yoke 312. The overall technical effect is better.

[0040] Furthermore, the magnet assembly 34 is fixed to the side of the magnetic yoke 312 facing the stator 32. The magnet assembly 34 includes a first magnet 341 and a second magnet 342. The first magnet 341 and the second magnet 342 have opposite polarities. The electromagnetic field continuously repels and attracts the first magnet 341 and the second magnet 342 to drive the mover 31 to perform alternating reciprocating motion.

[0041] like Figure 6 As shown, the linear motor 3 also includes a bracket 36. One end of the elastic element 33 is elastically connected to the bracket 36, and the other end is connected to the outside of the connecting frame 311. Each of the moving parts 31 is suspended on the bracket 36 through the elastic element 33. The stator 32 is fixedly connected to the bracket 36 and drives the two moving parts 31 to move back and forth alternately. The elastic element 33 deforms as the two moving parts 31 move back and forth alternately. At the same time, the elastic element 33 limits the amplitude of the two moving parts 31 moving back and forth alternately and facilitates the reset of the two moving parts 31.

[0042] like Figures 6 to 7As shown, the stator 32 includes an inverted E-shaped iron core 321, a coil 322, and a wire frame 323. The coil 322 is wound around the wire frame 323, and the wire frame 323 is fitted onto the magnetic pole in the middle of the iron core 321. The magnetic poles in the middle and on both sides of the wire frame 323 are higher than the wire frame 323. The bracket 36 includes a first fixing bracket 361 and a second fixing bracket 362, which are detachably connected. The stator 32 and the rotor 31 are enclosed within the space formed by the first fixing bracket 361 and the second fixing bracket 362. The first fixing bracket 361, the iron core 321, and the second fixing bracket 362 are connected together by bolts to form the stator assembly of the motor. The wire frame 323 is fitted onto the magnetic pole in the middle of the iron core 321. In use... An alternating current is generated by an external power source and the coil 322, causing the middle magnetic pole and the two side magnetic poles of the stator 32 to continuously switch, generating a constantly switching electromagnetic field. The stator 32 drives the two movers 31 to move back and forth alternately through the electromagnetic field, causing the elastic element 33 to deform with the alternating movement of the two movers 31. The deformation of the elastic element 33 transmits pressure to the pressure gauge 39. The pressure gauge 39 determines whether the movement of the cutter head 1 is obstructed based on the detected pressure value. When the cutter head 1 is obstructed, the deformation degree of the elastic element 33 decreases, and the pressure value detected by the pressure gauge 39 decreases. At this time, the power is increased to enable the cutter head 1 to overcome the resistance and operate normally. When the movers 31 resume their swing displacement, the pressure naturally increases, and the power returns to normal. This design greatly saves energy.

[0043] like Figure 7 As shown, the mover 31 also includes an elastic element 38. One end of the elastic element 38 abuts against the inner side of the bracket 36, and the other end is connected to the outer side of the connecting frame 311. The elastic element 38 is designed to make it easier for the mover 31 to reset during reciprocating motion. In this embodiment, four elastic elements 38 are provided.

[0044] like Figure 6-7 As shown, the connecting frame 311 includes a bending portion 3111. One end of the elastic element 33 is fixedly connected to the bending portion 3111, and the other end is connected to the bracket 36. The bracket 36 reciprocates under the drive of the stator 32, causing the elastic element 33 to deform. By setting the bending portion 3111, the elastic element 33 does not directly contact the magnetic yoke 312, thus extending the service life of the magnetic yoke 312. At the same time, it makes the processing of parts and the connection with other parts more convenient.

[0045] Furthermore, such as Figure 2As shown, the outer casing 2 includes a first casing 21 and a second casing 22. The first casing 21 and the second casing 22 are connected by snap-fit ​​screws. This structural design facilitates installation and disassembly. When the linear motor 3 has a problem, the outer casing 2 can be directly disassembled to check the problem of the linear motor 3. At the same time, the outer casing 2 is designed for the user to hold, making it convenient to pick up and use.

[0046] like Figure 8 As shown, it also includes a limiting component 4, which includes a limiting member 41 and a limiting rod 42. The limiting member 41 has a through hole 411 in the middle. One end of the limiting rod 42 is inserted into the through hole 411, and the other end is inserted into the bracket 36. The limiting member 41 also has connecting holes 412 on both sides. The limiting member 41 is rotatably connected to the magnetic yoke 312 by fasteners 43 passing through the connecting holes 412 and the connecting frame 311, so that the limiting member 41 is rotatably connected to each of the moving parts 31 respectively. The two movers 31 are pivotally connected to the bracket 36 via the limiting member 41, which limits the range of reciprocating movement of the two movers 31, preventing excessive movement from causing vibration or vibration noise. The resistance encountered during reciprocating movement is smaller, thus requiring less current, which can further reduce energy consumption and noise, and improve the user experience. At the same time, the two movers 31 are pivotally connected to the bracket 36 via the limiting member 41, with the limiting rod 42 as the lever fulcrum and the two fasteners 43 as the power points in opposite directions, realizing the linkage of the kinetic energy of the two movers 31 and improving the utilization of kinetic energy efficiency.

[0047] Specifically, such as Figure 9-11 As shown, the moving blade assembly 11 includes a moving blade 111 and a moving blade holder 112. The moving blade 111 and the moving blade holder 112 are fixedly connected. The moving blade holder 112 is provided with a drive groove 1121. The transmission shaft 35 is inserted into the drive groove 1121 to drive the moving blade 111 to reciprocate, so that the moving blade 111 reciprocates relative to the fixed blade 12.

[0048] Furthermore, such as Figure 10 As shown, the top of the moving blade holder 112 is provided with a slot 1122, and the fixed base 13 is provided with a torsion spring 113. The torsion spring 113 presses against the slot 1122, so that the moving blade assembly 11 returns to its original position during reciprocating motion. At the same time, the moving blade assembly 11 and the fixed blade 12 are always kept in a tightly pressed state to ensure the cutting effect. In use, the torsion spring 113 deforms when the moving blade 111 reciprocates. Under the elastic action of the deformation of the torsion spring 113, the moving blade assembly 11 moves in the opposite direction to achieve rapid return to its original position. By setting the torsion spring 113, the swing speed of the moving blade assembly 11 is increased, thereby achieving a better cutting effect.

[0049] like Figure 10-11As shown, the moving blade assembly 11 also includes a swing arm 114. One end of the swing arm 114 is connected to the moving blade holder 112, and the other end is connected to the fixed base 13. When the moving blade holder 112 reciprocates, the swing arm 114 will also deform to cause the moving blade assembly 11 to perform a reverse reset movement. This design of the swing arm 114 is simple in structure, easy to install, has a better noise reduction effect, and can extend the service life of the moving blade assembly 11.

[0050] The following is a detailed explanation of the working principle of this utility model;

[0051] In use, an alternating current is generated by an external power source and the coil 322, causing the stator 32 to generate an electromagnetic field. The stator 32 drives the two movers 31 to move back and forth alternately through the electromagnetic field, causing the elastic element 33 to deform with the alternating movement of the two movers 31. The deformation of the elastic element 33 or the vibration change of the mover assembly transmits pressure to the pressure gauge 39. The pressure gauge 39 determines whether the movement of the cutter head 1 is obstructed based on the detected pressure value. When the cutter head 1 is obstructed, the deformation degree of the elastic element 33 decreases or the displacement vibration of the mover assembly weakens, and the pressure value detected by the pressure gauge 39 decreases. At this time, the power is increased to make the cutter head 1 overcome the resistance and make the cutter head 1 run normally. When the mover 31 resumes its swing displacement, the pressure naturally increases and the power returns to normal. This design greatly saves energy.

[0052] The innovation of this utility model lies in the fact that the moving part is equipped with an elastic element and a pressure gauge on at least one side. The pressure gauge determines the movement state of the cutter head by detecting the degree of deformation of the elastic element. When obstructed, the pressure decreases, and the power is automatically increased to enable the moving cutter assembly to overcome the resistance. When normal, the power is restored, realizing intelligent power regulation, improving the user experience, and greatly saving energy. The linear motor drives the reciprocating motion of the moving cutter assembly. Compared with the traditional rotary motor, its transmission shaft can swing back and forth, and the swing amplitude can be limited and adjusted according to the actual situation, saving energy and electricity. The power is increased only when the cutter head is damaged, and the preset power is restored when normal, avoiding resource waste.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

[0054] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A hair trimmer with pressure sensing, characterized in that The device includes a cutting head (1), a housing (2), a pressure gauge (39), and a linear motor (3). The cutting head (1) includes a moving blade assembly (11), a fixed blade (12), and a fixed base (13). The fixed blade (12) is fixedly connected to the fixed base (13). The moving blade assembly (11) is connected to the fixed base (13) and reciprocates. The linear motor (3) includes a moving element (31), a stator (32), and a drive shaft (35). The moving element (31) is located above the stator (32) and performs alternating reciprocating motion under the magnetic action of the stator (32). One end of the drive shaft (35) is connected to the moving blade assembly (11), and the other end is connected to the moving element (31). The drive shaft (35) transmits the movement of the moving element (31) to the moving blade assembly (11), causing the moving blade assembly (11) to reciprocate. The pressure gauge (39) is fixedly installed on the outer shell (2) and close to the moving element (31), and can sense different pressure values. When the reciprocating motion of the moving blade assembly (11) is obstructed, the pressure gauge (39) measures a decrease in pressure and increases the power to make the moving blade assembly (11) overcome the resistance and reciprocate. When the pressure gauge (39) measures that the pressure has recovered to the predetermined value, the power has recovered to the normal preset value.

2. The hair trimmer with pressure sensing of claim 1, wherein, At least one side of the mover (31) is provided with an elastic element (33), and the pressure gauge (39) is adjacent to the elastic element (33).

3. The hair trimmer with pressure sensing of claim 2, wherein, A buffer (37) is also provided between the elastic element (33) and the pressure gauge (39).

4. The hair trimmer with pressure sensing of claim 3, wherein, The mover (31) includes a connecting frame (311), a magnetic yoke (312), and a magnet assembly (34) that works in conjunction with the stator (32). The connecting frame (311) is fixedly connected to the magnetic yoke (312). At least one of the connecting frames (311) is provided with the drive shaft (35). The drive shaft (35) passes through the connecting frame (311) and the magnetic yoke (312) and is fixedly connected to the magnetic yoke (312). The elastic element (33), the pressure gauge (39), and the buffer element (37) always remain in contact with each other.

5. The hair trimmer with pressure sensing of claim 4, wherein, The linear motor (3) includes a bracket (36), which includes a first fixed frame (361) and a second fixed frame (362). The first fixed frame (361) and the second fixed frame (362) are detachably connected to enclose the stator (32) and the mover (31) within the space formed by the first fixed frame (361) and the second fixed frame (362).

6. The hair trimmer with pressure sensing of claim 5, wherein, The connecting frame (311) includes a bending portion (3111), one end of the elastic element (33) is fixedly connected to the bending portion (3111), and the other end is connected to the bracket (36).

7. The hair trimmer with pressure sensing of claim 5, wherein, It also includes a limiting component (4), which includes a limiting member (41) and a limiting rod (42). The limiting member (41) has a through hole (411) in the middle. One end of the limiting rod (42) is inserted into the through hole (411) and the other end is inserted into the bracket (36). The limiting member (41) also has connecting holes (412) on both sides. The limiting member (41) is rotatably connected to the magnetic yoke (312) by fasteners (43) passing through the connecting holes (412) and the connecting frame (311).

8. The hair trimmer with pressure sensing of claim 1, wherein, The moving blade assembly (11) includes a moving blade (111) and a moving blade holder (112). The moving blade (111) and the moving blade holder (112) are fixedly connected. The moving blade holder (112) is provided with a drive groove (1121). The transmission shaft (35) is inserted into the drive groove (1121) to drive the moving blade (111) to reciprocate.

9. The hair trimmer with pressure sensing of claim 8, wherein, The moving knife holder (112) has a slot (1122) on its top, and a torsion spring (113) is provided in the fixed base (13), and the torsion spring (113) presses against the slot (1122).

10. The hair trimmer with pressure sensing of claim 9, wherein, The moving blade assembly (11) also includes a swing arm (114), one end of which is connected to the moving blade holder (112) and the other end is connected to the fixed base (13).

Images