Tool bit assembly and electric shaver

Abstract

The embodiment of the utility model discloses a tool bit assembly and an electric shaver, the tool bit assembly comprises a static cutter, a moving cutter, a mounting rack and a tool apron, the static cutter covers the moving cutter, and the static cutter is attached to the moving cutter; the mounting frame is arranged on the side, away from the static cutter, of the moving cutter and provided with mounting walls which are oppositely arranged in the first direction at intervals, and the mounting walls are fixedly connected to the moving cutter; the tool apron comprises a guide part and a transmission part which are connected with each other, and the guide part is fixedly connected to the mounting frame and located between the two mounting walls; the transmission part penetrates through the mounting frame and is used for being connected with a driving device of the electric shaver so as to drive the movable cutter to reciprocate in the second direction relative to the static cutter; the first direction, the second direction and the thickness direction of the movable cutter intersect pairwise. By adding the combination of the mounting frame and the movable cutter, the movable cutter does not need to be formed through punching, the deformation problem generated in the forming process of the movable cutter is avoided, therefore, the movable cutter and the static cutter are attached more tightly, and the shaving effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electric shavers, and in particular to a cutter head assembly and an electric shaver. Background Art

[0002] As people's requirements for personal hygiene increase, electric shavers have become a common washing and care appliance. In the prior art, electric shavers usually include a cutter head assembly and a main body. The cutter head assembly includes a static cutter and a movable cutter. The movable cutter moves relative to the static cutter to trim hair. In the prior art, a Chinese patent with patent number CN221111915U discloses that an assembly groove is stamped into the middle of the movable cutter, a clearance hole is opened at the bottom of the assembly groove, and the movable cutter holder is installed in the clearance hole in the assembly groove to realize the assembly of the movable cutter and the movable cutter holder. However, due to the effect of stamping, the trimming edge of the movable cutter is easily deformed, resulting in poor flatness of the movable cutter, making the movable cutter and the static cutter not fit tightly enough, affecting the shaving effect.

[0003] The above content is only used to assist in understanding the technical solution of the utility model and does not constitute an admission that the above content is prior art. Utility Model Content

[0004] In view of the above problems, the present invention proposes a cutter head assembly, which aims to solve the technical problem that the assembly groove formed by stamping the middle part of the movable knife will cause the movable knife to have poor flatness and the movable knife and the stationary knife to not fit tightly enough.

[0005] To achieve the above-mentioned purpose, the cutter head assembly proposed by the present invention comprises: a stationary cutter, a movable cutter, a mounting frame and a cutter seat, wherein:

[0006] The stationary knife covers the movable knife, and the stationary knife fits the movable knife;

[0007] The mounting frame is arranged on a side of the movable blade away from the stationary blade, and the mounting frame has mounting walls that are opposite and spaced apart in a first direction, and the mounting walls are fixedly connected to the movable blade;

[0008] The blade holder includes a guide portion and a transmission portion that are connected to each other. The guide portion is fixedly connected to the mounting frame and is located between the two mounting walls. The transmission portion is passed through the mounting frame and is used to connect to the driving device of the electric shaver to drive the movable blade to reciprocate relative to the stationary blade along a second direction. The first direction, the second direction, and the thickness direction of the movable blade intersect with each other.

[0009] In one embodiment, the mounting wall is provided with plug-in portions at two opposite ends in the second direction, and the movable blade is provided with a plug-in hole for plugging with the plug-in portion.

[0010] In one embodiment, both the mounting bracket and the moving blade are made of metal, and the plugging portion is fixedly welded to the jack.

[0011] In one embodiment, the stationary blade includes a first substrate and two shearing portions respectively connected to opposite sides of the first substrate in the first direction, and the moving blade includes a second substrate and two serrated portions respectively connected to opposite sides of the second substrate in the first direction. The two shearing portions are respectively in contact with the two serrated portions; two opposite wall surfaces of the first substrate and the second substrate are spaced apart to form an avoidance space.

[0012] In one embodiment, the middle part of the first substrate arches away from the second substrate;

[0013] And / or, the middle part of the second substrate bulges in the direction close to the stationary blade to form a connecting portion, and the jack is opened in the connecting portion.

[0014] In one embodiment, the second substrate further includes an avoidance portion located between the plugging portion and the serrated portion, and a surface of the avoidance portion facing the stationary blade is lower than a surface of the serrated portion facing the stationary blade.

[0015] In one embodiment, the mounting bracket further includes a bottom plate connected between the two mounting walls, and the bottom plate and the two mounting walls enclose an installation groove;

[0016] The transmission portion is connected to the bottom wall of the guiding portion. The guiding portion is installed in the installation groove and fixedly connected to the bottom plate, and the transmission portion penetrates through the bottom plate.

[0017] In one embodiment, the tool head assembly further includes a guide rail fixedly connected to a side of the stationary blade close to the moving blade;

[0018] The moving blade is provided with a guiding hole extending along the second direction, and the guide rail penetrates through the guiding hole and is slidably connected to the guiding portion.

[0019] In one embodiment, a guiding groove is opened on a wall surface of the guiding portion facing the moving blade corresponding to the guiding hole. The guiding groove extends along the second direction, and the guide rail is accommodated in the guiding groove.

[0020] In one embodiment, the guiding groove has two guiding walls opposite to each other in the first direction, and a plurality of guiding protrusions are convexly provided on opposite wall surfaces of the two guiding walls. The guide rail is arranged between the two guiding protrusions in the first direction.

[0021] In one embodiment, a plurality of hot melt columns are respectively provided at opposite ends of the wall surface of the guiding portion facing away from the moving blade in the second direction. The bottom plate is provided with a plurality of mounting holes corresponding to the hot melt columns. The hot melt columns pass through the mounting holes and are hot melt welded to the mounting frame.

[0022] In one embodiment, the cutter head assembly further includes a stationary knife holder and an elastic member. The stationary knife is fixedly connected to the stationary knife holder, and the stationary knife holder is disposed on a side of the mounting frame away from the moving blade; the elastic member is disposed between the moving blade and the stationary knife holder.

[0023] The present utility model further provides an electric shaver, which includes a driving device and the cutter head assembly as described above. The output shaft of the driving device is connected to the knife seat of the cutter head assembly.

[0024] The cutter head assembly of the present utility model is fixedly connected to the moving blade through the mounting frame. The guiding portion is fixedly connected to the mounting frame. The transmission portion passes through the mounting frame and is connected to the driving device of the electric shaver to drive the moving blade to reciprocate relative to the stationary knife in the second direction, realizing the shearing function. By adding the combination of the mounting frame and the moving blade, the two mounting walls of the mounting frame and the moving blade enclose a groove. The moving blade does not need to be formed by stamping, avoiding the deformation problem generated during the forming process of the moving blade, so that the moving blade and the stationary knife are more closely attached, improving the shaving effect. Secondly, the transmission portion passes through the mounting frame, and the guiding portion is located between the two mounting walls. This structure provides an installation space for the knife seat, making the distance between the knife seat and the guiding mechanism of the electric shaver closer, and the components of the cutter head assembly are more compactly arranged, which is beneficial to reducing the volume of the electric shaver. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 Shows a schematic structural diagram of the cutter head assembly of the present utility model;

[0027] Figure 2 For Figure 1 The exploded view of the structure of the cutter head assembly in

[0028] Figure 3 For Figure 1 Another exploded view of the structure of the cutter head assembly in

[0029] Figure 4 For Figure 1 The sectional view of the cutter head assembly in

[0030] Figure 5 Another sectional view of the middle cutter head assembly; Figure 1 Another sectional view of the middle cutter head assembly;

[0031] Figure 6 Assembly schematic diagram of the middle mounting bracket and the moving cutter; Figure 3 Assembly schematic diagram of the middle mounting bracket and the moving cutter;

[0032] Figure 7 Structural schematic diagram of the middle mounting bracket; Figure 6 Structural schematic diagram of the middle mounting bracket;

[0033] Figure 8 Structural schematic diagram of the middle tool holder; Figure 3 Structural schematic diagram of the middle tool holder;

[0034] Explanation of the reference numerals in the attached drawings:

[0035] Label Name Label Name Label Name 100 Tool bit assembly 110 Stationary knife 111 Shearing part 112 First substrate 120 Moving knife 121 Second substrate 122 Sawtooth part 123 Connecting part 124 Jack 125 Clearance part 130 Mounting bracket 131 Mounting wall 132 Insertion part 133 Mounting groove 134 Bottom plate 135 Mounting hole 140 Tool holder 141 Guiding part 142 Transmission part 143 Guiding groove 144 Guiding convex part 145 Hot melt post 150 Stationary knife holder 160 Elastic part 161 Elastic support arm 170 Clearance space 126 Guiding hole 180 Guide rail

[0036] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0037] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of the technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of the technical solutions does not exist and is not within the protection scope required by the present utility model.

[0038] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that meet both A and B.

[0040] The utility model provides a cutter head assembly 100 for an electric shaver.

[0041] In the embodiment of this utility model, please refer to Figures 1 to 8 The cutter head assembly 100 includes a stationary blade 110, a movable blade 120, a mounting frame 130 and a blade holder 140, wherein the stationary blade 110 covers the movable blade 120, and the stationary blade 110 and the movable blade 120 are in contact with each other; the mounting frame 130 is arranged on the side of the movable blade 120 away from the stationary blade 110, and the mounting frame 130 has mounting walls 131 that are opposite and spaced apart in a first direction, and the mounting walls 131 are fixedly connected to the movable blade 120; the blade holder 140 includes a guide portion 141 and a transmission portion 142 that are connected to each other, the guide portion 141 is fixedly connected to the mounting frame 130 and is located between the two mounting walls 131, and the transmission portion 142 is passed through the mounting frame 130 and is used to connect to the driving device of the electric shaver to drive the movable blade 120 to reciprocate relative to the stationary blade 110 along the second direction; the first direction, the second direction, and the thickness direction of the movable blade 120 intersect each other.

[0042] In this embodiment, the stationary blade 110 and the movable blade 120 can both be in the form of long flat plates. The stationary blade 110 can also be in other shapes so that the teeth of the movable blade 120 and the stationary blade 110 fit together. The movable blade 120 can be connected to the mounting bracket 130 by plugging, bonding, threading, or other fixed connection methods. The mounting bracket 130 can be "concave" shaped, including a bottom wall and two opposing and spaced mounting walls 131. The guide portion 141 of the blade holder 140 is fixedly connected to the bottom wall of the mounting bracket 130 and is located between the two mounting walls 131. The transmission portion 142 of the blade holder 140 is inserted through the bottom wall of the mounting bracket 130. The bottom wall of the mounting bracket and the mounting walls 131 form a stable limiting structure that supports and limits the blade holder 140. This arrangement has a simple structure and is easy to manufacture and install. In other embodiments, the mounting bracket 130 can also be fixedly connected to the side walls of the blade holder 140 to provide positional support for the blade holder 140. The guide portion 141 is used to connect to the guide mechanism of the electric shaver so that the movable blade 120 reciprocates along the second direction.

[0043] The cutter head assembly 100 of the present utility model is fixedly connected to the moving cutter 120 through the mounting frame 130. The guiding portion 141 is fixedly connected to the mounting frame 130. The transmission portion 142 is drivingly connected to the driving device of the electric shaver to drive the moving cutter 120 to reciprocate relative to the stationary cutter 110 along the second direction, realizing the shearing function. By adding the combination of the mounting frame 130 and the moving cutter 120, two mounting walls 131 of the mounting frame 130 and the moving cutter 120 enclose a groove. The moving cutter 120 does not need to be formed by stamping, avoiding the deformation problem generated during the forming process of the moving cutter 120, so that the moving cutter 120 fits more closely with the stationary cutter 110, improving the shaving effect. Secondly, the transmission portion 142 passes through the mounting frame 130, and the guiding portion 141 is located between the two mounting walls 131. This structure provides an installation space for the cutter base 140, making the distance between the cutter base 140 and the guiding mechanism of the electric shaver closer, and the components of the cutter head assembly 100 are arranged more compactly, which is beneficial to reducing the volume of the electric shaver.

[0044] Specifically, please refer to Figure 6 and Figure 7 , plug-in portions 132 are respectively protruded at opposite ends of the mounting wall 131 in the second direction, and the second substrate 121 is provided with insertion holes 124 that are inserted and matched with the plug-in portions 132.

[0045] In this embodiment, the mounting frame 130 is fixedly connected to the second substrate 121 by inserting the plug-in portions 132 protruded on the mounting wall 131 into the insertion holes 124 on the second substrate 121. Compared with other fixed connection methods, the insertion operation is more simple and fast, and can be accurately positioned, improving the production and assembly efficiency.

[0046] Furthermore, both the mounting frame 130 and the moving cutter 120 are made of metal materials, and the plug-in portions 132 and the insertion holes 124 are welded and fixed. By welding and fixing the plug-in portions 132 and the insertion holes 124, welding is performed on the basis of their insertion, further enhancing the connection strength and stability between the moving cutter 120 and the mounting frame 130, avoiding loosening and falling off, and ensuring the stability of the cutter head assembly 100 under different working conditions. Secondly, welding further improves the accuracy and fit between the moving cutter 120 and the mounting frame 130. For example, welding can eliminate assembly errors through the fusion welding process, ensure the fit between the plug-in portions 132 and the insertion holes 124, and make the structure of the mounting frame 130 and the moving cutter 120 more compact and stable.

[0047] In an embodiment, please refer to Figure 4, the stationary cutter 110 includes a first substrate 112 and two shearing portions 111 respectively connected to opposite sides of the first substrate 112 in the first direction. The movable cutter 120 includes a second substrate 121 and two serrated portions 122 respectively connected to opposite sides of the second substrate 121 in the first direction. The two shearing portions 111 are respectively in contact with the two serrated portions 122. Two opposite wall surfaces of the first substrate 112 and the second substrate 121 are spaced apart to form an avoidance space 170.

[0048] In this embodiment, the shearing portion 111 has a plurality of cutter teeth spaced apart in the second direction, and the serrated portion 122 also has a plurality of serrations spaced apart in the second direction. The shearing portion 111 is in contact with the serrated portion 122, and the serrated portion 122 reciprocates in the second direction to shear hair. The two side edges of the stationary cutter 110 can be thickened to make the middle region relatively thinner to form the avoidance space 170, or the surface of the stationary cutter 110 bulges upward to form the avoidance space 170 with the second substrate 121. The upwardly bulging shape of the stationary cutter 110 can be square or arc-shaped, which is not limited herein.

[0049] The setting of the avoidance space 170 is beneficial to the closer contact between the shearing portion 111 of the stationary cutter 110 and the serrated portion 122 of the movable cutter 120. For example, when the first substrate 112 and the second substrate 121 are in direct contact, the slight unevenness between the two planes will cause the contact to be not tight. The machining error and assembly tolerance will cause the contact surfaces of the first substrate 112 and the second substrate 121 not to fully match. The slight gap between the first substrate 112 and the second substrate 121 will cause the serrated portion 122 and the shearing portion 111 not to fully contact, affecting the shaving effect. Secondly, the metal material will expand due to heat during the working process. Direct contact will cause thermal expansion and deformation to affect the degree of contact. Uneven thermal expansion will cause deformation between the first substrate 112 and the second substrate 121. The thermal expansion and deformation of the first substrate 112 and the second substrate 121 will cause the change of the gap between the serrated portion 122 and the shearing portion 111, making the degree of contact worse and affecting the shaving effect. In addition, when the first substrate 112 and the second substrate 121 are in direct contact, the contact area between the two is too large, resulting in an increase in the frictional force between the two. In the long run, it will cause serious wear of the stationary cutter 110 and the second substrate 121, reducing the service life of the stationary cutter 110 and the movable cutter 120.

[0050] In one embodiment, the middle part of the first substrate 112 arches away from the second substrate 121; and / or, the middle part of the second substrate 121 bulges in the direction close to the stationary cutter 110 to form a connecting portion 123, and the jack 124 is opened in the connecting portion 123.

[0051] In this embodiment, by setting the middle part of the first substrate 112 to arch upward in an arc shape, while forming an avoidance space 170 between the first substrate 112 and the second substrate 121, the shearing part 111 is not affected by the arching. The shearing part 111 and the serrated part 122 always maintain a fitting state, improving the fitting tightness between the two. Secondly, the stationary cutter 110 directly contacts the user's skin. The arc-shaped surface makes the user feel more comfortable, avoids possible scratches or discomfort, and improves the safety of shaving.

[0052] Secondly, the connecting part 123 has a larger thickness compared to the edge of the second substrate 121, improving the rigidity of the connecting part 123, ensuring that the second substrate 121 will not be deformed or damaged due to the formation of the insertion hole 124, and further causing the deformation of the serrated part 122, improving the flatness of the movable cutter 120, and making the serrated part 122 and the shearing part 111 fit tightly.

[0053] In one embodiment, the second substrate 121 further includes an avoidance part 125 located between the insertion part 132 and the serrated part 122. The surface of the avoidance part 125 facing the stationary cutter 110 is lower than the surface of the serrated part 122 facing the stationary cutter 110. This structure is beneficial to making the serrated part 122 and the shearing part 111 fit more tightly. For example, if the avoidance part 125 is flush with or protrudes from the surface of the serrated part 122 facing the stationary cutter 110, it may cause the contact surface between the stationary cutter 110 and the movable cutter 120 to be irregular or there to be additional gaps. Such an irregular contact surface will cause the razor to not reach an ideal fitting state during operation, affecting the shaving effect.

[0054] In one embodiment, please refer to Figure 4 , the mounting bracket 130 further includes a bottom plate 134 connected between the two mounting walls 131. The bottom plate 134 and the two mounting walls 131 enclose an installation groove 133; the transmission part 142 is connected to the bottom wall of the guiding part 141. The guiding part 141 is installed in the installation groove 133 and is fixedly connected to the bottom plate 134. The transmission part 142 penetrates through the bottom plate 134.

[0055] In this embodiment, the mounting bracket 130 forms an installation groove 133 through the bottom plate 134 and the two mounting walls 131. This design provides a stable support and fixing structure. The formation of the installation groove 133 ensures that the guiding part 141 of the knife holder 140 can be accurately installed and fixed in the mounting bracket 130 and is not prone to movement or loosening. And the two mounting walls 131 can play a certain limiting role. If the installation of the guiding part 141 and the bottom plate 134 is not stable enough, the two mounting walls 131 can limit the guiding part 141 to prevent the guiding part 141 from moving to other positions of the cutter head assembly 100, improving the safety of the electric razor.

[0056] In one embodiment, the cutter head assembly 100 further includes a guide rail 180 fixedly connected to the side of the stationary cutter 110 close to the movable cutter 120; the movable cutter 120 is provided with a guide hole 126 extending in the second direction, and the guide rail 180 penetrates through the guide hole 126 and is slidably connected to the guiding portion 141.

[0057] In this embodiment, the guide rail 180 is fixedly connected to the side of the stationary cutter 110 close to the movable cutter 120, making the structure of the overall cutter head assembly 100 more compact. Secondly, the movable cutter 120 is provided with a guide hole 126 extending in the second direction, and the guide rail 180 penetrates through the guide hole 126 and is slidably connected to the guiding portion 141, simplifying the assembly process of the cutter head assembly 100. At the same time, it provides a reliable guiding and motion control mechanism, enabling the movable cutter 120 to accurately move in the second direction during shaving.

[0058] Preferably, to provide a definite stroke to limit the movement path of the cutter base 140, the length of the guide hole 126 in the second direction is greater than the length of the guide rail 180 in the second direction.

[0059] Furthermore, a guide groove 143 is provided on the wall surface of the guiding portion 141 facing the movable cutter 120 corresponding to the guide hole 126, and the guide groove 143 extends in the second direction. The guide rail 180 is accommodated in the guide groove 143. This setting can make the cooperation between the guide rail 180 and the guiding portion 141 more convenient, ensuring that the cutter base 140 drives the movable cutter 120 to move in the second direction, while avoiding lateral movement.

[0060] Furthermore, the guide groove 143 has two guiding walls opposite to each other in the first direction, and a plurality of guiding protrusions 144 are convexly provided on the opposite wall surfaces of the two guiding walls. The guide rail 180 is arranged between the two guiding protrusions 144 in the first direction. The guide rail 180 is arranged between these guiding protrusions 144, effectively restricting the swaying and unnecessary lateral movement of the guiding portion 141 in the first direction, enabling the guide rail 180 to maintain a stable position and direction during shaving, improving the cutting precision and consistency of the razor, and thus optimizing the shaving effect. At the same time, the setting of the guiding protrusions 144 reduces the contact area between the guiding portion 141 and the guide rail 180, reduces the friction force, and improves the service life of the cutter base 140 and the guide rail 180. Secondly, restricting the swaying of the guiding portion 141 in the first direction can prevent the movable cutter 120 from swaying in the first direction, further improving the fitting degree between the cutting portion 111 and the serrated portion 122, so that the two always maintain a fitting state.

[0061] In one embodiment, please refer to Figure 5 and Figure 8, on the opposite ends of the wall surface of the guiding portion 141 away from the moving blade 120 in the second direction, a plurality of hot melt columns 145 are respectively provided. The bottom plate 134 is provided with a plurality of mounting holes 135 corresponding to the hot melt columns 145. The hot melt columns 145 pass through the mounting holes 135 and are hot melt welded to the mounting frame 130.

[0062] In this embodiment, the guiding portion 141 can be made of plastic material, and the mounting frame 130 is made of metal material. The guiding portion 141 and the hot melt columns 145 can be integrally formed, which simplifies the manufacturing process. And compared with the traditional mechanical fixation, the hot melt welding can complete the assembly without complex tools. At the same time, it maintains strong stability and can resist the vibration and impact that may be encountered during the use of the razor. Compared with other fixation methods, the cost of hot melt welding is low, which is beneficial to reducing the production cost of the electric razor.

[0063] In one embodiment, please refer to Figure 4 , the cutter head assembly 100 further includes a stationary knife holder 150 and an elastic member 160. The stationary knife 110 is fixedly connected to the stationary knife holder 150. The stationary knife holder 150 is arranged on the side of the mounting frame 130 away from the moving blade 120; the elastic member 160 is arranged between the moving blade 120 and the stationary knife holder 150. Specifically, the elastic member 160 includes two elastic support arms 161 opposite to each other in the first direction. One end of the elastic support arm 161 is connected to the stationary knife holder 150, and the other end elastically abuts against the connection part of the second substrate 121 and the serrated portion 122.

[0064] In this embodiment, the elastic member 160 abuts against the connection part of the second substrate 121 and the serrated portion 122 through the elastic support arms 161, providing elastic support in the thickness direction of the moving blade 120. The elastic force of the elastic support arms 161 enables the serrated portion 122 of the moving blade 120 to always be in close contact with the shearing portion 111 of the stationary knife 110, improving the shaving effect. Secondly, the presence of the elastic member 160 can reduce the vibration transmission between the moving blade 120 and the stationary knife holder 150. Vibration may generate noise and unstable shaving effect during the operation of the razor. The elastic support arms 161 can absorb and reduce these vibrations, improving the shaving experience and making it more stable and comfortable. In other embodiments, the elastic member 160 can also be a spring. At least two springs are arranged between the moving blade 120 and the stationary knife holder 150. The elastic force of the springs enables the serrated portion 122 of the moving blade 120 to always be in close contact with the shearing portion 111 of the stationary knife 110.

[0065] The present utility model further provides an electric shaver, which includes a driving device and the cutter head assembly 100 as described above. The specific structure of the cutter head assembly 100 refers to the above-mentioned embodiments. Since this electric shaver adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated herein one by one. Among them, the output shaft of the driving device is connected to the transmission part 142 of the cutter holder 140 to drive the movable cutter 120 to perform reciprocating motion.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A cutter head assembly for an electric shaver, characterized in that, The cutter head assembly includes a stationary cutter, a movable cutter, a mounting frame and a cutter seat, wherein: The stationary knife covers the movable knife, and the stationary knife fits the movable knife; The mounting frame is arranged on a side of the movable blade away from the stationary blade, and the mounting frame has mounting walls that are opposite and spaced apart in a first direction, and the mounting walls are fixedly connected to the movable blade; The blade holder includes a guide portion and a transmission portion that are connected to each other. The guide portion is fixedly connected to the mounting frame and is located between the two mounting walls. The transmission portion is passed through the mounting frame and is used to connect to the driving device of the electric shaver to drive the movable blade to reciprocate relative to the stationary blade along a second direction. The first direction, the second direction, and the thickness direction of the movable blade intersect with each other.

2. The cutter head assembly according to claim 1, wherein The mounting wall is provided with plug-in parts at two opposite ends in the second direction, and the movable knife is provided with a plug-in hole for plugging and matching with the plug-in part.

3. The cutter head assembly according to claim 2, wherein, The mounting frame and the movable knife are both made of metal, and the plug-in portion is fixed to the socket by welding.

4. The cutter head assembly according to claim 2, wherein, The stationary knife includes a first substrate and two shearing portions respectively connected to the first substrate on opposite sides in the first direction; the movable knife includes a second substrate and two serrated portions respectively connected to the second substrate on opposite sides in the first direction; the two shearing portions are respectively fitted with the two serrated portions; the two opposite wall surfaces of the first substrate and the second substrate are spaced apart to form a avoidance space.

5. The cutter head assembly according to claim 4, characterized in that The middle portion of the first substrate is arched away from the second substrate; And / or, a middle portion of the second substrate is raised in a direction close to the static blade to form a connecting portion, and the insertion hole is provided in the connecting portion.

6. The cutter head assembly according to claim 5, wherein, The second substrate further includes a clearance portion located between the inserting portion and the serrated portion, wherein a surface of the clearance portion facing the static blade is lower than a surface of the serrated portion facing the static blade.

7. The cutter head assembly according to claim 1, characterized in that, The mounting frame further includes a bottom plate connected between the two mounting walls, wherein the bottom plate and the two mounting walls enclose a mounting groove; The transmission part is connected to the bottom wall of the guide part, the guide part is installed in the installation groove and fixedly connected to the bottom plate, and the transmission part passes through the bottom plate.

8. The cutter head assembly according to any one of claims 1 to 7, characterized in that, The cutter head assembly further includes a guide rail, which is fixedly connected to a side of the stationary cutter close to the movable cutter; The movable knife is provided with a guide hole extending along the second direction, and the guide rail passes through the guide hole and is slidably connected to the guide portion.

9. The cutter head assembly according to claim 8, wherein, A guide groove is formed on a wall of the guide portion facing the movable knife and corresponding to the guide hole. The guide groove extends along the second direction, and the guide rail is accommodated in the guide groove.

10. The cutter head assembly according to claim 9, wherein, The guide groove has two guide walls facing each other in the first direction, and a plurality of guide protrusions are convexly provided on the facing wall surfaces of the two guide walls. The guide rail is arranged between the two guide protrusions in the first direction.

11. The cutter head assembly according to claim 7, wherein The wall of the guide portion facing away from the movable knife is provided with a plurality of heat-melt columns at opposite ends in the second direction, and the bottom plate is provided with a plurality of mounting holes corresponding to the heat-melt columns. The heat-melt columns are passed through the mounting holes and are heat-melted to the mounting frame.

12. The cutter head assembly according to claim 7, wherein The cutter head assembly further includes a stationary cutter holder and an elastic member. The stationary cutter is fixedly connected to the stationary cutter holder, and the stationary cutter holder is disposed on a side of the mounting bracket away from the moving cutter; the elastic member is disposed between the moving cutter and the stationary cutter holder.

13. An electric shaver, characterized in that, It includes a driving device and the cutter head assembly according to any one of claims 1 to 12, and an output shaft of the driving device is connected to the tool holder of the cutter head assembly.

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