Reciprocating shaver head

Abstract

The application provides a reciprocating shaver head, which comprises an outer holder, a static cutter fixedly installed on the outer holder, a dynamic cutter assembly installed in the outer holder, a motor output shaft drives the dynamic cutter assembly in the outer holder to move through a transmission assembly, the dynamic cutter assembly comprises a dynamic cutter holder and a dynamic cutter installed on the dynamic cutter holder, the outer holder is integrally formed and comprises a main body frame and a plurality of bottom supports symmetrically arranged on both sides of the center of the bottom of the main body frame, the plurality of bottom supports are provided with guide grooves extending in the reciprocating direction, the dynamic cutter holder is fixedly provided with a guide column vertically extending downward and corresponding to the guide grooves, the guide column is inserted into the guide grooves and can slide along the guide grooves in the transverse direction. Since the movement direction of the dynamic cutter holder is guaranteed by the movement guide in the shaver head, the linear reciprocating movement of the dynamic cutter assembly can be realized under the condition that the motor is eccentrically connected to the dynamic cutter holder, the straightness is high, and the noise is small.

Description

Technical Field

[0001] This invention relates to a razor, and more particularly to a reciprocating razor head. Background Technology

[0002] Personal care products, such as shaving devices, include a shaving head and a handle. The cutting action is achieved by the relative movement of inner and outer blades within the shaving head. The inner and outer blades are each mounted on their respective blade holders. Typically, the inner blade holder, driven by a motor, is installed within a recess in the outer blade holder. The connection between the outer blade holder and the outer blade holder body secures the inner core of the shaving head within the outer casing. However, the positional relationship between the inner and outer blade holders is crucial for the inner core of the shaving head. The inner blade holder is typically driven by a motor that drives an eccentric shaft, which is connected to the inner blade holder via a drive unit. Reciprocating motion is achieved by a drive arm connected to the drive unit. The drive arm of the drive unit counteracts the driving force in the non-reciprocating direction, achieving vibration damping and noise reduction, and ensuring the stability of the inner blade holder's reciprocating motion. However, this necessitates the creation of a connection space and height between the cutter head and the motor eccentric shaft, resulting in significant space waste. Furthermore, since the drive unit relies on external correction of moving parts, even slight wear or connection misalignment can cause the moving tool post to wobble. Moreover, the more transmission components there are, the more connection points there are, leading to greater errors. The center of the overall transmission is very prone to misalignment, preventing the inner tool post (moving tool post) from achieving linear reciprocating motion, resulting in noise and vibration. Additionally, it also presents problems such as cumbersome assembly and high production costs. Summary of the Invention

[0003] This invention provides a reciprocating shaver head with high accuracy, compact structure, and low noise.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a reciprocating shaver head, the shaver head including an outer blade holder, a stationary blade fixedly installed on the outer blade holder, and a moving blade assembly installed inside the outer blade holder, the output shaft of the motor drives the moving blade assembly inside the outer blade holder to move through a transmission assembly, the moving blade assembly including a moving blade holder and a moving blade installed on the moving blade holder, the outer blade holder being integrally formed including a main frame forming a frame, and a plurality of base supports symmetrically distributed on both sides of the bottom center of the main frame, the plurality of base supports being provided with guide grooves extending in the reciprocating motion direction, all the guide grooves on the base supports being on the same straight line, the length of the guide grooves extending in the reciprocating motion direction being greater than the reciprocating motion stroke of the moving blade holder, the moving blade holder being fixedly provided with a guide post extending vertically downward and correspondingly cooperating with the guide groove, the guide post being inserted into the guide groove and sliding laterally along the guide groove within the guide groove.

[0005] As an improvement: the base support is in the shape of a boss, that is, the base support includes a seat body connecting the front and rear horizontal frames of the main body, a boss protruding from the center of the seat body and extending horizontally, the guide groove is opened along the length direction of the boss and has a certain depth, and the guide post is inserted into the guide groove and makes line contact with the front and rear walls of the guide groove.

[0006] As an improvement: symmetrical protrusions are provided on the front and rear sides of the boss on the base, which are parallel to the guide groove. The height of the protrusions on the base is lower than that of the boss. The outer tool holder and the moving tool holder are elastically supported by a spring. The spring connected to the moving tool holder abuts against the protrusion and makes point contact with the upper surface of the protrusion.

[0007] As an improvement: the projectile is made of sheet-like elastic material and includes a connecting part with a fastening structure and connected to the moving blade holder through the fastening structure, and a U-shaped spring pressing part. The U-shaped spring pressing part forks into two spring pressing arms. The spring pressing arms have downward protruding contact ribs near the free end. The upper surface of the protruding ribs is arc-shaped in cross-section, so that the projectile that is linked with the moving blade holder is pressed against the protruding ribs at point contact.

[0008] As an improvement: the free end of the spring-loaded arm is bent along the direction opposite to the direction of the protruding contact rib.

[0009] As an improvement: the projectile is made of sheet-like elastic material and includes a connecting part with a fastening structure and connected to the moving blade holder through the fastening structure, and a U-shaped spring pressing part. The U-shaped spring pressing part forks into two spring pressing arms. The spring pressing arms have a downward protruding bubble-shaped contact near the free end. The upper surface of the protruding edge is flat. The bubble-shaped contact allows the projectile, which is linked with the moving blade holder, to be pressed against the protruding edge in point contact.

[0010] As an improvement: the free end of the spring-loaded arm is bent along the direction of the bend, and the direction of the bend is opposite to the direction of the contact protrusion.

[0011] As an improvement: when the moving tool holder reciprocates, the guide column reciprocates along the guide groove without touching the end walls on both sides of the guide groove.

[0012] As an improvement, the guide groove extends vertically through the boss to form a through hole.

[0013] As an improvement: several limiting protrusions are symmetrically arranged on the outer surfaces of the two horizontal frames of the moving tool holder. The limiting protrusions are located in the gap between the outer surfaces of the two horizontal frames of the moving tool holder and the inner wall of the main frame. The highest point of the limiting protrusions abuts against the inner wall of the main frame.

[0014] The beneficial effects provided by this invention are as follows: By employing a motion guide within the tool holder to ensure the direction of motion, it enables the reciprocating linear motion of the moving tool assembly even with an eccentric direct-drive connection between the motor and the tool holder. This results in high straightness retention, low noise, and the guide structure of the base can directly replace the drive unit, significantly reducing size, minimizing kinetic energy loss, and facilitating assembly. Furthermore, the guide structure of the base can supplement the drive unit by restricting the direction of motion, preventing non-linear swaying and twisting of the tool holder. The base and outer tool holder are integrally formed, with the outer tool holder providing internal conduction and buffering. The assembly and manufacturing of the guide groove and guide post are easier and less costly than existing drive unit structures. Several base supports are symmetrically arranged at the bottom of the outer tool holder in a discrete distribution. This arrangement at least partially closes the bottom of the outer tool holder's receiving groove, forming a unit-type tool head core, facilitating the unit-type assembly of multiple tool heads. Simultaneously, the gaps between the base supports facilitate dust removal and cleaning, simplifying assembly, maintenance, replacement, and cleaning. The base provides a load-bearing foundation and platform for modifying the internal structure of the cutter head, eliminating the need for support bases derived from the side wall of the outer tool holder, such as those for elastic or floating components. This significantly improves the stability of the internal support structure of the cutter head, making design expansion more convenient and flexible. The guide groove extends in the reciprocating motion direction for a length greater than the reciprocating stroke of the moving tool holder, effectively preventing collisions with the outer tool holder at the extreme points of motion, greatly reducing noise and vibration.

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the reciprocating razor head provided by the present invention.

[0017] Figure 2 yes Figure 1 A schematic diagram of the bottom structure.

[0018] Figure 3 yes Figure 1 A schematic diagram of the explosion structure.

[0019] Figure 4 This is a schematic diagram of the external tool holder.

[0020] Figure 5 This is a schematic diagram of the interaction between the moving tool holder and the projectile.

[0021] Figure 6 This is a schematic diagram of the projectile's structure. Detailed Implementation

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5, Figure 6 As shown, in one embodiment of the reciprocating shaver head of the present invention, the shaver head includes an outer shaver holder 1, a stationary blade 2 fixedly mounted on the outer shaver holder, and a moving blade assembly mounted inside the outer shaver holder. The motor output shaft drives the moving blade assembly inside the outer shaver holder to move through a transmission assembly. The moving blade assembly includes a moving shaver holder 3 and moving blades 4 mounted on the moving shaver holder 3. The outer shaver holder 1 is integrally formed and includes a main frame 11 forming a frame and two bottom supports 12 symmetrically arranged on both sides of the bottom center of the main frame 11. The two bottom supports 12 are provided with guide grooves 12.1 extending in the reciprocating motion direction. All guide grooves 12.1 on the bottom supports 12 are on the same straight line. The length of the guide grooves 12.1 extending in the reciprocating motion direction is greater than the reciprocating motion stroke of the moving shaver holder. The moving shaver holder 3 is fixedly provided with a guide post 3.1 extending vertically downward and correspondingly cooperating with the guide groove 12.1. The guide post 3.1 is inserted into the guide groove 12.1 and can slide laterally along the guide groove within the guide groove 12.1. In this embodiment, the guide groove extends vertically through the boss 12.3 to improve shaving efficiency, prevent shaving hair buildup within the guide groove, and ensure cleanliness and precise guidance. Alternatively, a shaving guide wall can be installed inside the moving blade holder to isolate the guide groove (not shown in the figure). During the reciprocating motion of the moving blade holder 3, the guide post 3.1 reciprocates along the guide groove 12.1 without touching the side walls of the guide groove 12.1. This further reduces vibration and noise, improving grip and shaving feel.

[0023] In this embodiment, the base 12 is in the shape of a boss. Specifically, the base 12 includes a seat 12.2 connecting the front and rear horizontal frames of the main frame, and a boss 12.3 protruding from the center of the seat 12.2 and extending horizontally. The guide groove is formed along the length of the boss 12.3 and has a certain depth. The deep guide groove can more smoothly guide the guide post of the moving blade holder and is not restricted in the vertical direction, facilitating the floating setting of the moving blade assembly. This ensures close contact between the moving blade and the lower surface of the stationary blade, resulting in efficient and clean shaving without tugging or pulling hair. The guide post 3.1 is inserted into the guide groove and makes line contact with the front and rear walls of the guide groove. This line contact ensures smooth sliding and limits the front-rear offset of the moving blade holder, reducing vibration and noise. On the base 12.2, symmetrical protruding ribs 12.4 are provided on both the front and rear sides of the boss 12.3, parallel to the guide groove. The height of the protruding ribs 12.4 on the base 12.2 is lower than that of the boss 12.3. The outer tool holder 1 and the moving tool holder are elastically supported by a spring 5. The spring 5 connected to the moving tool holder abuts against the protruding rib and makes point contact with the upper surface of the protruding rib. The point contact between the spring 5 and the upper surface of the protruding rib reduces friction and power consumption. The structure of parallel protruding ribs on the front and rear sides of the boss 12.3 provides a stable support base for the moving tool holder, that is, four corner supports on at least two straight lines, making the pressure of the moving tool on the lower surface of the stationary tool more uniform.

[0024] To achieve point contact between the projectile 5 and the upper surface of the convex ridge, while simultaneously ensuring stable elastic support for the moving blade holder and moving blade assembly, the projectile 5 in this embodiment is made of sheet-like elastic material and includes a connecting part 5.1 with a fastening structure and connected to the moving blade holder via the fastening structure, and a U-shaped spring-loaded part 5.2. The U-shaped spring-loaded part 5.2 forks to form two spring-loaded arms 5.21. A downwardly protruding contact rib 5.22 is provided on the free end of each spring-loaded arm. The upper surface of the convex ridge has an arc-shaped protrusion in cross-section, thereby ensuring point contact between the projectile 5, which is linked to the moving blade holder, and the convex ridge 12.4. The free end of the spring-loaded arm 5.21 is bent in the opposite direction to the protrusion direction of the contact rib 5.22. The projectile 5 provides elastic force to the moving blade assembly, which is smoothly and elastically lifted by the projectile 5 and moves close to the stationary blade within the outer blade holder. Of course, if the upper surface of the protruding ridge is flat, a bubble-shaped contact protruding downwards can be provided on the spring-loaded arm near the free end to achieve point contact. The bubble-shaped contact allows the spring body 5, which is linked with the moving tool holder, to press against the protruding ridge 12.4 at point contact.

[0025] Several limiting protrusions 3.2 are symmetrically arranged on the outer surfaces of the two horizontal frames of the moving tool holder 3. The limiting protrusions are located in the gap between the outer surfaces of the two horizontal frames of the moving tool holder 3 and the inner wall of the horizontal frame of the main body frame 11. The highest point of the limiting protrusions 3.2 abuts against the inner wall of the horizontal frame of the main body frame 11. In this embodiment, the main body frame 11 of the outer tool holder abuts against the moving tool holder at multiple points in the front and rear, which further avoids the displacement and collision of the moving tool holder in the front and rear directions within the outer tool holder. The inner wall of the horizontal frame of the main body frame 11 and the moving tool holder 3 are in an adaptive rather than tight fit relationship. The inner wall of the horizontal frame of the main body frame 11 only forms a flat abutment restriction on the moving tool holder 3 in the front and rear, without clamping force, and does not affect the smooth reciprocating movement of the moving tool holder in the horizontal straight line, and is free in the vertical direction.

[0026] Although the present invention has been disclosed above with specific embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of the appended claims.

Claims

1. A reciprocating shaving head, said shaving head comprising an outer holder (1), a static cutter (2) fixedly mounted on the outer holder, a dynamic cutter assembly mounted in the outer holder, the dynamic cutter assembly being driven by a motor output shaft through a transmission assembly to move in the outer holder, said dynamic cutter assembly comprising a dynamic holder (3) and a dynamic cutter (4) mounted on the dynamic holder (3), characterized in that: The outer tool holder (1) is integrally formed and comprises a main frame (11) and a plurality of bottom supports (12) symmetrically arranged at the bottom center of the main frame (11), the bottom supports (12) are provided with guide grooves (12.1) extending in the reciprocating direction, the guide grooves (12.1) on all the bottom supports (12) are on the same straight line, the guide grooves (12.1) extend in the reciprocating direction and have a length greater than the reciprocating stroke of the movable tool holder, the movable tool holder (3) is provided with a guide column (3.1) extending vertically downward and corresponding to the guide grooves (12.1), the guide column (3.1) is inserted into the guide grooves (12.1) and is slidable in the guide grooves (12.1) in the transverse direction, the bottom support (12) is in the form of a boss, that is, the bottom support (12) comprises a seat body (12.2) connecting the front and rear two horizontal frames of the main frame, and a boss (12.3) protruding at the center of the seat body (12.2) and extending in the transverse direction, the guide grooves are provided on the boss (12.3) in the length direction and have a certain depth, the guide column (3.1) is inserted into the guide grooves and is in line contact with the front and rear walls of the guide grooves, the seat body (12.2) is symmetrically provided with a convex edge (12.4) arranged in parallel with the guide grooves on the front and rear sides of the boss (12.3), the height of the convex edge (12.4) on the seat body (12.2) is lower than that of the boss (12.3), the outer tool holder (1) and the movable tool holder are elastically supported by the elastic body (5), the elastic body (5) connected to the movable tool holder abuts on the convex edge and is in point contact with the upper surface of the convex edge.

2. The reciprocating shaving razor head of claim 1, wherein: The elastic body (5) is made of sheet elastic material and comprises a connecting portion (5.1) provided with a buckling structure and connected to the movable tool holder through the buckling structure, and a U-shaped elastic pressing portion (5.2), the U-shaped elastic pressing portion (5.2) is bifurcated to form two elastic pressing arms (5.21), the elastic pressing arms are provided with downward protruding contact springs (5.22) at the free end positions, the upper surface of the convex edge is arc protruded in the cross section, so that the elastic body (5) connected to the movable tool holder is in point contact and pressed on the convex edge (12.4).

3. The reciprocating shaver head of claim 2, wherein: The free end of the elastic pressing arm (5.21) is bent in the direction opposite to the protruding direction of the contact spring (5.22).

4. The reciprocating shaver head of claim 1, wherein: The elastic body (5) is made of sheet elastic material and comprises a connecting portion (5.1) provided with a buckling structure and connected to the movable tool holder through the buckling structure, and a U-shaped elastic pressing portion (5.2), the U-shaped elastic pressing portion (5.2) is bifurcated to form two elastic pressing arms (5.21), the elastic pressing arms are provided with downward protruding contact springs (5.22) at the free end positions, the upper surface of the convex edge is arc protruded in the cross section, so that the elastic body (5) connected to the movable tool holder is in point contact and pressed on the convex edge (12.4).

5. The reciprocating shaver head of claim 4, characterized in that: The free end of the elastic pressing arm (5.21) is bent in the direction opposite to the protruding direction of the contact spring (5.22).

6. The reciprocating shaving razor head of claims 1 or 2 or 3 or 4 or 5, wherein: The guide grooves are through holes penetrating the boss (12.3) in the up-down direction. The guide grooves are through holes penetrating the boss (12.3) in the up-down direction.

7. The reciprocating shaver head of claims 1 or 2 or 3 or 4 or 5, characterized in that: The two lateral frame walls of the moving cutter holder (3) are symmetrically provided with a plurality of limiting protrusions (3.2) on the outer surfaces, which are located in the gap between the outer surfaces of the two lateral frame walls of the moving cutter holder (3) and the inner wall of the horizontal frame of the main body frame (11), and the highest points of the limiting protrusions (3.2) abut against the inner wall of the horizontal frame of the main body frame (11).

8. The reciprocating shaver head of claim 6, characterized by: The two lateral frame walls of the moving cutter holder (3) are symmetrically provided with a plurality of limiting protrusions (3.2) on the outer surfaces, which are located in the gap between the outer surfaces of the two lateral frame walls of the moving cutter holder (3) and the inner wall of the horizontal frame of the main body frame (11), and the highest points of the limiting protrusions (3.2) abut against the inner wall of the horizontal frame of the main body frame (11).

9. The reciprocating shaver head of claims 1 or 2 or 3 or 4 or 5, characterized in that: When the moving cutter holder (3) reciprocates, the guide column (3.1) reciprocates along the guide groove (12.1) without touching the end walls on both sides of the guide groove (12.1).

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