electric shaver

Abstract

This application provides an electric shaver, comprising: a shaver head assembly with a first connecting structure; a bracket and a rotating shaft, the bracket having a second connecting structure, the first connecting structure and the second connecting structure being rotatably connected via the rotating shaft, so that the first connecting structure can rotate relative to the bracket about the axis of the rotating shaft; and a torsional elastic element connected to the rotating shaft, the torsional elastic element cooperating with both the shaver head assembly and the bracket to achieve rotational reset between the shaver head assembly and the bracket. With this configuration, the shaver head assembly can flexibly rotate according to the applied force, thereby more fully conforming to the user's skin, especially complex curved areas such as the neck and jaw, making the shaver head assembly move faster and more smoothly, thus improving the shaving efficiency of the electric shaver.

Description

Technical Field

[0001] This application relates to the field of shaver technology, and particularly to an electric shaver. Background Technology

[0002] Currently, electric shavers on the market, especially rotary electric shavers, do not maintain sufficient contact between the shaver head and the user's skin during the contact and movement process. Users need to constantly move the shaver and change its angle, which reduces shaving efficiency and affects the user experience. Utility Model Content

[0003] Therefore, this application provides an electric shaver that can improve the fit between the shaver head assembly and the skin during shaving, thereby increasing shaving efficiency.

[0004] Specifically, the following technical solutions are included:

[0005] This application provides an electric shaver, the electric shaver comprising:

[0006] The cutter head assembly is provided with a first connecting structure;

[0007] The bracket and the rotating shaft are provided with a second connecting structure. The first connecting structure and the second connecting structure are rotatably connected by the rotating shaft, so that the first connecting structure can rotate relative to the bracket about the axis of the rotating shaft.

[0008] A torsional elastic element is connected to the rotating shaft. The torsional elastic element cooperates with both the cutter head assembly and the bracket to achieve rotational reset between the cutter head assembly and the bracket.

[0009] In the technical solution of this application, since the first connecting structure can rotate relative to the bracket around the axis of rotation, the blade head assembly can rotate relative to the bracket. During shaving, the blade head assembly can flexibly rotate according to the force applied, thereby more fully conforming to the user's skin, especially complex curved areas such as the neck and jaw, making the blade head assembly move faster and more smoothly, thus improving the shaving efficiency of the electric shaver. Furthermore, the flexible rotation of the blade head assembly can effectively disperse the pressure of the blade head assembly on the user's skin during shaving, improving shaving comfort. By setting a torsional elastic element, the blade head assembly can automatically reset under the elastic force of the torsional elastic element, thereby better following the user's skin when the blade head assembly changes direction, ensuring that the blade head assembly maintains a high degree of closeness to the skin.

[0010] In one possible implementation, the cutter head assembly has a clearance hole, the first connecting structure protrudes from the inner wall of the cutter head assembly, the clearance hole is adjacent to the first connecting structure, the clearance hole extends along the relative rotation direction between the cutter head assembly and the bracket, and the second connecting structure is inserted into the clearance hole.

[0011] In the technical solution of this application, by providing a clearance hole, the second connecting structure can extend into the head holder through the clearance hole, thereby connecting with the first connecting structure. This makes the connection between the head assembly and the bracket more compact, which helps to reduce the external space occupied by the first and second connecting structures, realizing the miniaturization design of the electric shaver. Furthermore, the clearance hole can improve the positioning speed of the second connecting structure and simplify the assembly process. Since the clearance hole extends along the relative rotation direction between the head assembly and the bracket, it provides room for the second connecting structure to move, ensuring the normal relative rotation between the head assembly and the bracket.

[0012] In one possible implementation, the two ends of the torsional elastic member are respectively provided with a first torsion arm and a second torsion arm, the first torsion arm cooperating with the second connecting structure, and the second torsion arm cooperating with the inner wall of the clearance hole.

[0013] In the technical solution of this application, during the process of the cutter head assembly rotating relative to the bracket under external force, the position of the first torsion arm remains relatively fixed, and the second torsion arm is squeezed as the cutter head assembly rotates, so that the torsional elastic element deforms and stores elastic potential energy. When the external force on the cutter head assembly disappears or changes, the second torsion arm undergoes recovery deformation and pushes the cutter head seat by abutting against the inner wall of the clearance hole, thereby resetting the cutter head assembly to the initial position.

[0014] In one possible implementation, the electric shaver further includes a limiting member connected to at least one end of the rotating shaft, the limiting member being used to axially limit the rotating shaft.

[0015] In the technical solution of this application, the axial movement of the rotating shaft is restricted by the limiting component, which improves the stability of the rotating shaft and makes the relative rotation between the cutter head assembly and the support more stable and reliable.

[0016] In one possible implementation, the limiting member is detachably connected to the rotating shaft.

[0017] In the technical solution of this application, the detachable connection between the limiting component and the rotating shaft enables the quick assembly and disassembly of the limiting component, facilitates the replacement of components such as the torsional elastic component and the rotating shaft, and improves the maintainability of the electric shaver.

[0018] In one possible implementation, the limiting member is an E-type retaining ring, and the outer wall of the rotating shaft is recessed with a mounting groove, which is continuously distributed around the axis of the rotating shaft, and the limiting member is installed in the mounting groove.

[0019] In the technical solution of this application, the E-type retaining spring has a simple structure, low cost, and is easy to disassemble and assemble. It can still maintain good elastic recovery ability after multiple uses. By setting the limiting component as an E-type retaining spring, it is beneficial to improve the assembly efficiency of the limiting component and reduce the production and maintenance costs of electric shavers.

[0020] In one possible implementation, the rotating shaft is provided with a boss portion that protrudes outward relative to the outer side wall of the rotating shaft, and the boss portion and the limiting member are respectively located at both ends of the rotating shaft in the axial direction.

[0021] In the technical solution of this application, the boss and the limiting member are used to restrict the axial displacement of the rotating shaft and prevent the rotating shaft from disengaging from the first connecting hole and the second connecting hole. At the same time, the boss is integrally set on the rotating shaft, which can improve the assembly efficiency of the rotating shaft. The boss can also serve as an assembly reference surface to improve the assembly accuracy of the rotating shaft with the bracket and the tool head assembly.

[0022] In one possible implementation, the electric shaver further includes a first housing and a second housing, the first housing being disposed within the second housing, the bracket being mounted on the first housing, and the second housing having a mating surface, the mating surface being an end face of the second housing near the end of the blade assembly, the plane containing the mating surface being inclined to the length direction of the second housing and parallel to the axial direction of the rotation axis.

[0023] In the technical solution of this application, since the plane where the mating surface is located is parallel to the axial direction of the rotation axis, the tilting direction of the second housing is adapted to the swing direction of the cutter head assembly, thus avoiding the second housing from affecting the normal swing of the cutter head assembly.

[0024] In one possible implementation, the cutter head assembly further includes a rotating blade, a transmission mechanism, and a transmission shaft, wherein the transmission mechanism is pulsatorically connected to the rotating blade and the transmission shaft, respectively.

[0025] The electric shaver also includes a drive unit and a connecting part. The drive unit is mounted on the first housing, and the connecting part is disposed on the output shaft of the drive unit. The connecting part is movably connected to the first end of the transmission shaft.

[0026] In the technical solution of this application, since the connecting part is connected to the transmission shaft, the power of the driving component can be transmitted to the rotating blade to realize the shaving and hair removal function of the electric shaver; since the connecting part is movably connected to the first end of the transmission shaft, during the rotation of the blade head assembly relative to the bracket, the connecting part can also adapt to the movement of the blade head assembly and swing relative to the connecting part, while ensuring the rotation of the rotating blade and the flexible swing of the blade head assembly as a whole.

[0027] In one possible implementation, the cutter head assembly further includes an elastic element, the second end of the drive shaft is movably connected to the transmission mechanism, and the elastic element is located between the drive shaft and the transmission mechanism.

[0028] In the technical solution of this application, by setting the second end of the transmission shaft to be movably connected to the transmission mechanism, even if the relative movement range between the first end of the transmission component and the connecting part is small, it can be compensated by the relative movement between the second end of the transmission shaft and the transmission mechanism, which fully adapts to the swing of the cutter head assembly relative to the bracket, avoids motion interference, and helps to ensure the flexible swing of the cutter head assembly as a whole.

[0029] In one possible implementation, the maximum swing angle of the cutter head assembly is 20° to 50°.

[0030] In the technical solution of this application, by setting the lower limit of the maximum swing angle of the blade head assembly to 20°, it can be ensured that the swing amplitude of the blade head assembly is sufficient to adapt to the curved surfaces of the user's skin such as the jaw and neck, and avoid insufficient dynamic contact between the blade head assembly and the skin due to the maximum swing angle of the blade head assembly being less than 20°; by setting the upper limit of the maximum swing angle of the blade head assembly to 50°, it can be avoided that the transmission shaft and the connecting part will detach due to the maximum swing angle of the blade head assembly being too large, causing slippage or even failure of the shaving function.

[0031] In one possible implementation, the support is a metal component.

[0032] In the technical solution of this application, by setting the bracket as a metal part, the high strength and high deformation resistance of the metal material are utilized to avoid wear and deformation of the second connection structure during relative movement, thereby improving the structural strength and reliability of the bracket. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 An exploded view of the electric shaver provided in the embodiments of this application;

[0035] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0036] Figure 3 A partial cross-sectional view of an electric shaver provided in an embodiment of this application;

[0037] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0038] Figure 5 This is a schematic diagram of the swinging of the head assembly of an electric shaver provided in an embodiment of this application;

[0039] Figure 6 This is a schematic diagram of the structure of the cutter head holder provided in an embodiment of this application;

[0040] Figure 7 A cross-sectional view of the cutter head holder provided in an embodiment of this application;

[0041] Figure 8 This is an exploded view of the bracket assembly provided in the embodiments of this application;

[0042] Figure 9 This is a schematic diagram of the assembly of the bracket provided in an embodiment of this application;

[0043] Figure 10 This is a schematic diagram of the structure of the torsional elastic element provided in the embodiments of this application;

[0044] Figure 11 This is an assembly diagram of the torsional elastic element provided in an embodiment of this application;

[0045] Figure 12 A cross-sectional view of an electric shaver provided in an embodiment of this application;

[0046] Figure 13 for Figure 12 Enlarged view of point C in the middle;

[0047] Figure 14 This is a schematic diagram of the structure of an electric shaver provided in one embodiment of this application;

[0048] Figure 15 This is a schematic diagram of the structure of an electric shaver provided in another embodiment of this application.

[0049] The reference numerals in the figure indicate:

[0050] 1-Cutter head assembly; 11-Cover; 111-Cutter mesh; 12-Cutter head holder; 121-First connecting structure; 1211-First connecting hole; 122-Allowing hole; 13-Rotating blade; 14-Transmission mechanism; 15-Transmission shaft; 151-First end; 152-Second end;

[0051] 2-Bracket; 21-Second connecting structure; 211-Second connecting hole;

[0052] 3-Rotating shaft; 31-Mounting groove; 32-Boss portion;

[0053] 4- Torsional elastic element; 41- First torsion arm; 42- Second torsion arm;

[0054] 5-Limiting components;

[0055] 6-First shell;

[0056] 7-Second shell; 71-Mating surface;

[0057] 8-Drive components;

[0058] 9-Connecting part; 91-Cavity;

[0059] 10-Elastic component;

[0060] 100 - Battery; 200 - Circuit board; 300 - Threaded fastener.

[0061] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0062] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0063] The directional terms used in the embodiments of this application, such as "up," "down," and "side," are generally based on the relative relationships shown in the figures. These directional terms are used merely to more clearly describe the relationships between structures, not to describe absolute directions. When the product is placed in different orientations, the orientation may change; for example, "up" and "down" may be interchanged.

[0064] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art.

[0065] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0066] Currently, electric shavers on the market, especially rotary electric shavers, do not maintain sufficient contact between the shaver head and the user's skin during the contact and movement process. Users need to constantly move the shaver and change its angle, which reduces shaving efficiency and affects the user experience.

[0067] To address the aforementioned technical problems, this application provides an electric shaver that can improve the fit between the shaver head assembly and the skin during shaving, thereby increasing shaving efficiency.

[0068] like Figures 1 to 15 As shown, the electric shaver provided in this embodiment includes a shaver head assembly 1, a bracket 2, a rotating shaft 3, and a torsion elastic element 4.

[0069] For example, the electric shaver is a rotary electric shaver.

[0070] The cutter head assembly 1 is provided with a first connecting structure 121, and the bracket 2 is provided with a second connecting structure 21. The first connecting structure 121 and the second connecting structure 21 are movably connected by a rotating shaft 3, so that the first connecting structure 121 can rotate relative to the bracket 2 around the axis of the rotating shaft 3. A torsional elastic element 4 is connected to the rotating shaft 3, and the torsional elastic element 4 cooperates with both the cutter head assembly 1 and the bracket 2 to realize the rotational reset between the cutter head assembly 1 and the bracket 2.

[0071] The side of the blade assembly 1 facing away from the bracket 2 is used to contact the user's skin and cut hair. For example... Figure 5 As shown, during shaving, when the shaving head assembly 1 is subjected to an external force F in the direction indicated by the arrow, the shaving head assembly 1 responds to the direction of the applied force F and rotates relative to the support 2 about the axis of the rotation shaft 3 in the direction indicated by the arc arrow, thus exhibiting a floating or oscillating motion of the shaving head assembly 1 as a whole. When the shaving head assembly 1 is not subjected to force, it can return to its initial position under the action of the torsional elastic element 4.

[0072] Rotating shaft 3 is cylindrical, such as Figure 7 As shown, the first connecting structure 121 has a first connecting hole 1211, as... Figure 8 As shown, the second connecting structure 21 has a second connecting hole 211, and the rotating shaft 3 is inserted into the first connecting hole 1211 and the second connecting hole 211, thereby realizing the rotational connection between the first connecting structure 121 and the second connecting structure 21.

[0073] The rotating shaft 3 is rotatably connected to at least one of the first connecting structure 121 and the second connecting structure 21. For example, the rotating shaft 3 is rigidly connected to the first connecting structure 121 and rotatably connected to the second connecting structure 21; or, the rotating shaft 3 is rigidly connected to the second connecting structure 21 and rotatably connected to the first connecting structure 121; or, the rotating shaft 3 is rotatably connected to both the first connecting structure 121 and the second connecting structure 21. The specific connection method between the rotating shaft 3 and the first connecting structure 121 and the second connecting structure 21 can be selected according to actual needs, as long as it can realize the relative movement between the cutter head assembly 1 and the support 2. This application does not make specific limitations in this regard.

[0074] For example, the torsional elastic element 4 is a torsion spring, capable of generating elastic potential energy and storing / releasing energy through torsional deformation. For example Figure 10 As shown, the torsional elastic element 4 is formed by winding metal wire into a spiral structure and is sleeved on the rotating shaft 3.

[0075] Since the torsional elastic element 4 is engaged with the cutter head assembly 1 and the bracket 2 respectively, when the cutter head assembly 1 rotates relative to the bracket 2 around the axis of the rotation shaft 3, the torsional elastic element 4 deforms and stores elastic potential energy; when the external force on the cutter head assembly 1 disappears or changes, the torsional elastic element 4 generates a reaction torque by restoring its deformation, thereby driving the cutter head assembly 1 to rotate and return to its initial position.

[0076] Furthermore, when the blade assembly 1 reciprocates on the user's skin in a certain direction, the torsional elastic element 4 can actively follow and conform to the user's skin by restoring its deformation when changing direction. This not only improves the smoothness of the blade assembly 1's movement and makes the blade assembly 1 move faster, but also improves the degree of conformity between the blade assembly 1 and the user's skin.

[0077] There can be multiple first connecting structures 121, second connecting structures 21, rotating shafts 3, and torsional elastic elements 4. Please refer to [the relevant documentation]. Figure 2 , Figure 3 , Figure 6 and Figure 7 There are two of each of the first connecting structure 121, the second connecting structure 21, the rotating shaft 3, and the torsional elastic element 4. When the electric shaver is assembled, the two first connecting structures 121, the two second connecting structures 21, the two rotating shafts 3, and the two torsional elastic elements 4 are respectively arranged at intervals along the axial direction of the rotating shaft 3 and are symmetrically distributed, which is beneficial to improving the uniformity and stability of the force when the shaver head assembly 1 rotates.

[0078] The electric shaver provided in this application embodiment allows the head assembly 1 to rotate relative to the bracket 2 around the axis of the rotation shaft 3, as the first connecting structure 121 can rotate. During shaving, the head assembly 1 can flexibly rotate according to the force applied, thus better conforming to the user's skin, especially complex curved areas such as the neck and jaw. This results in faster and smoother movement of the head assembly 1, thereby improving the shaving efficiency of the electric shaver. Furthermore, the flexible rotation of the head assembly 1 effectively disperses the pressure of the head assembly 1 on the user's skin during shaving, improving shaving comfort. By providing a torsional elastic element 4, the head assembly 1 can automatically reset under the elastic force of the torsional elastic element 4, thus better following the user's skin when the head assembly 1 changes direction, ensuring that the head assembly 1 maintains a high degree of closeness to the skin.

[0079] In some embodiments, such as Figure 6 and Figure 7 As shown, the cutter head assembly 1 has a clearance hole 122. The first connecting structure 121 protrudes from the inner wall of the cutter head assembly 1. The clearance hole 122 is adjacent to the first connecting structure 121. The clearance hole 122 extends along the relative rotation direction between the cutter head assembly 1 and the bracket 2. The second connecting structure 21 is inserted into the clearance hole 122.

[0080] like Figure 12 As shown, the cutter head assembly 1 includes a cover 11 and a cutter head seat 12 that are connected to each other. The cover 11 and the cutter head seat 12 enclose a receiving cavity for accommodating the parts. The cutter head seat 12 is a hollow shell structure. The clearance hole 122 is a through hole opened at the bottom of the cutter head seat 12. The first connecting structure 121 protrudes relative to the bottom inner wall of the cutter head seat 12.

[0081] By providing the clearance hole 122, the second connecting structure 21 can extend into the head holder 12 through the clearance hole 122, thereby connecting with the first connecting structure 121. This makes the connection between the head assembly 1 and the bracket 2 more compact, which helps to reduce the external space occupied by the first connecting structure 121 and the second connecting structure 21, and realizes the miniaturization design of the electric shaver. Furthermore, the clearance hole 122 can improve the positioning speed of the second connecting structure 21 and simplify the assembly process. Since the clearance hole 122 extends along the relative rotation direction between the head assembly 1 and the bracket 2, the clearance hole 122 provides room for the second connecting structure 21 to move, ensuring the normal relative rotation between the head assembly 1 and the bracket 2.

[0082] Optionally, the two surfaces of the clearance hole 122 facing each other along the relative rotation direction between the cutter head assembly 1 and the bracket 2 define the extreme position of the cutter head assembly 1, thereby limiting the relative rotation angle range between the cutter head assembly 1 and the bracket 2. When the second connecting structure 21 contacts the two surfaces, the cutter head assembly 1 reaches the extreme position and cannot rotate further. In other words, the extension length of the clearance hole 122 determines the rotation angle range of the cutter head assembly 1.

[0083] In some embodiments, the two ends of the torsional elastic member 4 are respectively provided with a first torsion arm 41 and a second torsion arm 42. The first torsion arm 41 cooperates with the second connecting structure 21, and the second torsion arm 42 cooperates with the inner wall of the clearance hole 122.

[0084] like Figure 10 As shown, the first torsion arm 41 and the second torsion arm 42 are bent to allow them to mate with other components.

[0085] like Figure 11 As shown, the first torsion arm 41 is hooked to the second connecting structure 21, and the second torsion arm 42 abuts against the inner wall of one end of the clearance hole 122 in its own extending direction.

[0086] During the rotation of the cutter head assembly 1 relative to the support 2 under the influence of an external force, the position of the first torsion arm 41 remains relatively fixed, while the second torsion arm 42 is compressed as the cutter head assembly 1 rotates, causing the torsional elastic element 4 to deform and store elastic potential energy. When the external force on the cutter head assembly 1 disappears or changes, the second torsion arm 42 undergoes restorative deformation and pushes the cutter head seat 12 by abutting against the inner wall of the clearance hole 122, thereby resetting the cutter head assembly 1 to its initial position.

[0087] In some embodiments, the electric shaver further includes a limiting member 5, which is connected to at least one end of the rotating shaft 3 and is used to axially limit the rotating shaft 3.

[0088] The limiting member 5 can be set at one end of the rotating shaft 3 or at both ends of the rotating shaft 3.

[0089] For example Figure 4 As shown, the limiting member 5 is disposed on the outer periphery of the end of the rotating shaft 3 near the first connecting structure 121. The limiting member 5 can limit the extreme position of the rotating shaft 3 in the axial direction by abutting against the first connecting structure 121. Of course, the limiting member 5 can also be disposed on the outer periphery of the end of the rotating shaft 3 near the second connecting structure 21, thereby limiting the extreme position of the rotating shaft 3 in the axial direction by abutting against the second connecting structure 21.

[0090] In this embodiment, the axial movement of the rotating shaft 3 is restricted by the limiting member 5, which improves the stability of the rotating shaft 3 and makes the relative rotation between the cutter head assembly 1 and the bracket 2 more stable and reliable.

[0091] In some embodiments, the limiting member 5 is detachably connected to the rotating shaft 3.

[0092] For example, the limiting member 5 and the rotating shaft 3 are detachably connected by means of threaded connection, snap-fit ​​connection, or rotary lock connection.

[0093] In this embodiment, the detachable connection between the limiting member 5 and the rotating shaft 3 enables the quick assembly and disassembly of the limiting member 5, facilitating the replacement of components such as the torsional elastic member 4 and the rotating shaft 3, thereby improving the maintainability of the electric shaver.

[0094] In some embodiments, the limiting member 5 is an E-type snap ring, and the outer wall of the rotating shaft 3 is recessed with a mounting groove 31. The mounting groove 31 is continuously distributed around the axis of the rotating shaft 3, and the limiting member 5 is installed in the mounting groove 31.

[0095] like Figure 2 As shown, the E-type retaining ring is an elastic element shaped like the letter "E," possessing good elasticity and toughness. For example... Figure 4 As shown, the mounting groove 31 is recessed relative to the outer wall of the rotating shaft 3 along the radial direction of the rotating shaft 3. The mounting groove 31 can surround the rotating shaft 3 or extend in an arc shape. A portion of the limiting member 5 is embedded in the mounting groove 31. The mounting groove 31 can constrain the limiting member 5 in the axial direction of the rotating shaft 3, improve the installation stability of the limiting member 5, and prevent the limiting member 5 from moving or displacing along the axial direction of the rotating shaft 3.

[0096] The E-type retaining spring has a simple structure, low cost, and is easy to disassemble and assemble. It can still maintain good elastic recovery ability after repeated use. By setting the limiting component 5 as an E-type retaining spring, it is beneficial to improve the assembly efficiency of the limiting component 5 and reduce the production and maintenance costs of electric shavers.

[0097] In some embodiments, the rotating shaft 3 is provided with a boss portion 32, which protrudes outward relative to the outer side wall of the rotating shaft 3, and the boss portion 32 and the limiting member 5 are respectively located at both ends of the rotating shaft 3 in the axial direction.

[0098] For example Figure 4 As shown, the boss portion 32 is annularly disposed on the outer wall of the rotating shaft 3, and extends radially outward along the rotating shaft 3, and is integrally connected to the rotating shaft 3. When the electric shaver is assembled, one of the boss portion 32 and the limiting member 5 is located on the side of the first connecting structure 121 opposite to the second connecting structure 21, and the other is located on the side of the second connecting structure 21 opposite to the first connecting structure 121.

[0099] By setting the boss portion 32, the axial displacement of the rotating shaft 3 is restricted by the boss portion 32 and the limiting member 5, preventing the rotating shaft 3 from disengaging from the first connecting hole 1211 and the second connecting hole 211. At the same time, the boss portion 32 is integrally set on the rotating shaft 3, which can improve the assembly efficiency of the rotating shaft 3. The boss portion 32 can also serve as an assembly reference surface, improving the assembly accuracy of the rotating shaft 3 with the bracket 2 and the cutter head assembly 1.

[0100] In some embodiments, the electric shaver further includes a first housing 6 and a second housing 7. The first housing 6 is disposed inside the second housing 7, and the bracket 2 is installed in the first housing 6. The second housing 7 has a mating surface 71, which is the end face of the second housing 7 near the end of the blade assembly 1. The plane containing the mating surface 71 is inclined to the length direction of the second housing 7 and parallel to the axial direction of the rotation shaft 3.

[0101] like Figure 1 As shown, the first housing 6 and the second housing 7 are generally cylindrical shells. The first housing 6 provides an installation position for the bracket 2, for example... Figure 8 and Figure 9 As shown, the bracket 2 is mounted to one end of the first housing 6 via a threaded fastener 300. Figure 12 As shown, the battery 100, circuit board 200, and other components of the electric shaver are installed inside the first housing 6. The second housing 7 provides shelter and protection for the first housing 6 and its internal components, and also provides a gripping area for the user.

[0102] like Figure 5 As shown, the mating surface 71 is the upper end surface of the second housing 7. The plane where the mating surface 71 is located is set at an angle to the central axis of the second housing 7, so that the upper end of the second housing 7 has a shape with one end high and the other end low. Since the plane where the mating surface 71 is located is parallel to the axial direction of the rotating shaft 3, the tilting direction of the second housing 7 is adapted to the swing direction of the cutter head assembly 1, so as to avoid the second housing 7 affecting the normal swing of the cutter head assembly 1.

[0103] Optionally, the mating surface 71 can limit the movement of the cutter head assembly 1. For example... Figure 5 As shown in (a), when the cutter head assembly 1 abuts against the lowest point of the mating surface 71, the cutter head assembly 1 is at the extreme position of its downward swing motion, which is also the initial position of the cutter head assembly 1 (i.e., the position of the cutter head assembly 1 in its natural state); as Figure 5 As shown in (b), when the cutter head assembly 1 abuts against the highest point of the mating surface 71, the cutter head assembly 1 is at the limit position of the upward swing motion. In other words, the tilt angle of the mating surface 71 determines the range of motion of the cutter head assembly 1.

[0104] Optionally, at least one of the clearance hole 122 and the mating surface 71 can limit the range of motion of the cutter head assembly 1, which can be selected according to actual needs.

[0105] Optionally, the electric shaver also includes a flexible decorative element, which is connected to the head assembly 1 and the second housing 7 respectively. The flexible decorative element can shield and protect the components inside the second housing 7, and its flexibility and deformability can also prevent it from affecting the movement of the head assembly 1.

[0106] In some embodiments, such as Figure 12 and Figure 13 As shown, the shaver head assembly 1 also includes a rotating blade 13, a transmission mechanism 14, and a transmission shaft 15. The transmission mechanism 14 is connected to the rotating blade 13 and the transmission shaft 15 respectively. The electric shaver also includes a drive member 8 and a connecting part 9. The drive member 8 is mounted on the first housing 6, and the connecting part 9 is disposed on the output shaft of the drive member 8. The connecting part 9 is movably connected to the first end 151 of the transmission shaft 15.

[0107] The cover 11 is provided with a blade screen 111, which has hair-through holes for allowing hair to enter. There can be multiple hair-through holes, and their shapes include, but are not limited to, rectangular strips. The rotating blade 13 has blades positioned corresponding to the hair-through holes. The blades and the blade screen 111 cooperate to cut the hair entering the hair-through holes, achieving shaving and other hair removal effects. The connecting part 9 is fixedly connected to the output shaft of the drive member 8. The power generated by the output shaft of the drive member 8 is transmitted to the connecting part 9, the drive shaft 15, the transmission mechanism 14, and the rotating blade 13, causing the rotating blade 13 to rotate and cut the hair.

[0108] like Figure 13 As shown, the lower end of the drive shaft 15 is the first end 151, and the connecting part 9 is provided with a cavity 91. The first end 151 of the drive shaft 15 is movably disposed in the cavity 91. Under the drive of the drive member 8, the drive shaft 15 can rotate around its own central axis. At the same time, the swing of the cutter head assembly 1 can drive the first end 151 of the drive shaft 15 to move in the cavity 91.

[0109] In this embodiment, since the connecting part 9 is connected to the drive shaft 15, the power of the drive member 8 can be transmitted to the rotating blade 13 to realize the shaving and hair removal function of the electric shaver. Since the connecting part 9 is movably connected to the first end 151 of the drive shaft 15, the connecting part 9 can also adapt to the movement of the blade assembly 1 and swing relative to the connecting part 9 during the rotation of the blade assembly 1 relative to the bracket 2, thus ensuring the rotation of the rotating blade 13 and the flexible swing of the blade assembly 1 as a whole.

[0110] Optionally, the cutter head assembly 1 includes a plurality of blades 111 and rotating blades 13. For example Figure 14 As shown, the cutter head assembly 1 includes two blade nets 111, and two rotating blades 13 are arranged in a one-to-one correspondence with the two blade nets 111; or, as... Figure 15 As shown, the cutter head assembly 1 includes three blades 111, and three rotating blades 13 are arranged in a one-to-one correspondence with the three blades 111.

[0111] In some embodiments, the cutter head assembly 1 further includes an elastic element 10, the second end 152 of the drive shaft 15 is movably connected to the transmission mechanism 14, and the elastic element 10 is located between the drive shaft 15 and the transmission mechanism 14.

[0112] It is understandable that the first end 151 and the second end 152 of the drive shaft 15 are the two ends of the drive shaft 15 in the axial direction.

[0113] For example, the transmission mechanism 14 is a gear mechanism, which realizes power transmission through the meshing of the gears, and finally realizes the rotation of the rotating blade 13.

[0114] like Figure 13 As shown, the upper end of the drive shaft 15 is the second end 152, and the elastic element 10 is a spring. One end of the elastic element 10 is engaged with the transmission mechanism 14, and the other end is engaged with the second end 152 of the drive shaft 15. The elastic deformation capability of the elastic element 10 not only provides buffer protection for the second end 152 of the drive shaft 15 and the transmission mechanism 14, but also realizes the movable connection between the second end 152 of the drive shaft 15 and the transmission mechanism 14.

[0115] In this embodiment, by setting the second end 152 of the transmission shaft 15 to be movably connected to the transmission mechanism 14, even if the relative movement range between the first end 151 of the transmission member and the connecting part 9 is small, it can be compensated by the relative movement between the second end 152 of the transmission shaft 15 and the transmission mechanism 14, which fully adapts to the swing of the cutter head assembly 1 relative to the bracket 2, avoids motion interference, and helps to ensure the flexible swing of the cutter head assembly 1 as a whole.

[0116] In some embodiments, the maximum swing angle of the cutter head assembly 1 is 20° to 50°. For example, the maximum swing angle of the cutter head assembly 1 can be 20°, 30°, 40°, 50°, etc.

[0117] It should be noted that the maximum swing angle of the cutter head assembly 1 is the angle through which the cutter head assembly 1 rotates relative to the support 2 from one extreme position to another. For example, the maximum swing angle of the cutter head assembly 1 is the angle through which the cutter head assembly 1 rotates relative to the support 2 from one extreme position to another. Figure 5 (a) shows the extreme position rotated to Figure 5 (b) shows the angle rotated through the extreme position.

[0118] By setting the lower limit of the maximum swing angle of the blade head assembly 1 to 20°, it can be ensured that the swing amplitude of the blade head assembly 1 is sufficient to adapt to the curved surfaces of the user's skin, such as the jaw and neck, and avoid insufficient dynamic contact between the blade head assembly 1 and the skin due to the maximum swing angle of the blade head assembly 1 being less than 20°. By setting the upper limit of the maximum swing angle of the blade head assembly 1 to 50°, it can be prevented that the transmission shaft 15 will detach from the connecting part 9 due to the maximum swing angle of the blade head assembly 1 being too large, which could cause slippage or even failure of the shaving function.

[0119] In some embodiments, the bracket 2 is a metal component.

[0120] Optionally, the bracket 2 is made of metal and manufactured by stamping or die casting.

[0121] By setting the bracket 2 as a metal part, the high strength and high deformation resistance of the metal material are utilized to avoid wear and deformation of the second connecting structure 21 during relative movement, thereby improving the structural strength and reliability of the bracket 2.

[0122] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0123] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0124] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An electric shaver, characterized in that, The electric shaver includes: The cutter head assembly (1) is provided with a first connecting structure (121); The bracket (2) and the rotating shaft (3) are provided with a second connecting structure (21). The first connecting structure (121) and the second connecting structure (21) are rotatably connected by the rotating shaft (3) so that the first connecting structure (121) can rotate relative to the bracket (2) about the axis of the rotating shaft (3). A torsion elastic element (4) is connected to the rotating shaft (3). The torsion elastic element (4) cooperates with the cutter head assembly (1) and the bracket (2) respectively to realize the rotational reset between the cutter head assembly (1) and the bracket (2).

2. The electric shaver according to claim 1, characterized in that The cutter head assembly (1) has a clearance hole (122), the first connecting structure (121) protrudes from the inner wall of the cutter head assembly (1), the clearance hole (122) is adjacent to the first connecting structure (121), the clearance hole (122) extends along the relative rotation direction between the cutter head assembly (1) and the bracket (2), and the second connecting structure (21) is inserted into the clearance hole (122).

3. The electric shaver according to claim 2, characterized in that The torsion elastic member (4) is provided with a first torsion arm (41) and a second torsion arm (42) at both ends. The first torsion arm (41) cooperates with the second connecting structure (21), and the second torsion arm (42) cooperates with the inner wall of the clearance hole (122).

4. The electric shaver according to claim 1, characterized in that The electric shaver also includes a limiting member (5), which is connected to at least one end of the rotating shaft (3) and is used to axially limit the rotating shaft (3).

5. The electric shaver according to claim 4, characterized in that The limiting member (5) is detachably connected to the rotating shaft (3).

6. The electric shaver according to claim 5, characterized in that The limiting member (5) is an E-type retaining ring. The outer wall of the rotating shaft (3) is recessed with a mounting groove (31). The mounting groove (31) is continuously distributed around the axis of the rotating shaft (3). The limiting member (5) is installed in the mounting groove (31).

7. The electric shaver according to any one of claims 4 to 6, characterized in that The rotating shaft (3) is provided with a boss (32), which protrudes outward relative to the outer side wall of the rotating shaft (3). The boss (32) and the limiting member (5) are located at the two ends of the rotating shaft (3) in the axial direction.

8. The electric shaver according to claim 1, characterized in that The electric shaver also includes a first housing (6) and a second housing (7). The first housing (6) is disposed inside the second housing (7). The bracket (2) is installed in the first housing (6). The second housing (7) has a mating surface (71). The mating surface (71) is the end face of the second housing (7) near the end of the blade assembly (1). The plane containing the mating surface (71) is inclined to the length direction of the second housing (7) and parallel to the axial direction of the rotating shaft (3).

9. The electric shaver according to claim 8, characterized in that The cutter head assembly (1) further includes a rotating blade (13), a transmission mechanism (14) and a transmission shaft (15), wherein the transmission mechanism (14) is connected to the rotating blade (13) and the transmission shaft (15) respectively. The electric shaver also includes a drive unit (8) and a connecting part (9). The drive unit (8) is mounted on the first housing (6), and the connecting part (9) is disposed on the output shaft of the drive unit (8). The connecting part (9) is movably connected to the first end (151) of the transmission shaft (15).

10. The electric shaver according to claim 9, characterized in that The cutter head assembly (1) further includes an elastic element (10), the second end (152) of the drive shaft (15) is movably connected to the transmission mechanism (14), and the elastic element (10) is located between the drive shaft (15) and the transmission mechanism (14).

11. The electric shaver according to any of claims 1 to 6, 8 to 10, characterized in that The maximum swing angle of the cutter head assembly (1) is 20° to 50°.

12. The electric shaver according to any of claims 1 to 6, 8 to 10, characterized in that The bracket (2) is a metal part.

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