blade assembly

Abstract

A kind of blade assembly, including static knife, moving knife and connecting piece, the moving knife has connecting part, the connecting piece has limit compression part, the limit compression part is pre-pressed with the connecting part of moving knife, the limit compression part is compressed on static knife, by setting connecting piece, limit compression part on connecting piece can be compressed to moving knife, provide pre-pressure to moving knife, and the moving knife in the design itself is the structure with elasticity, therefore, when limit compression part compresses moving knife, moving knife can be deformed while generating elastic force, ensure that moving knife is always attached to static knife during cutting hair, so as to improve the sharpness of blade assembly when cutting hair, can more efficiently cut hair.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hair trimming device, in particular to a blade assembly. BACKGROUND

[0002] The dynamic knife support in the prior art is thin in thickness, which has the defect of high temperature rise during high-speed operation, and the connection strength between the dynamic knife support and the static knife support is not high. During the reciprocating movement of the dynamic knife, there is a gap between the dynamic knife and the static knife, which causes collision and noise, affecting the user experience. The shaving razor in the patent "reciprocating electric shaving razor head adopting rigid fixed knife" with application number 202020634242.7 is composed of a dynamic knife, a fixed knife, a fixed knife support, a dynamic knife support and an elastic element. The dynamic knife support is connected with the dynamic knife and presses the dynamic knife tightly on the fixed knife. Such a structure makes the dynamic knife unstable during reciprocating movement, resulting in that the dynamic knife and the static knife cannot be closely attached, so that a gap is formed, causing hair cutting to be stuck, affecting the user experience and reducing the hair cutting efficiency. SUMMARY

[0003] Therefore, the present application provides a blade assembly.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] A blade assembly comprises a static knife, a dynamic knife and a connecting piece. The dynamic knife has a cutting part and a connecting part. The connecting piece has a limiting and pressing part. The limiting and pressing part is pre-pressed with the connecting part of the dynamic knife.

[0006] Preferably, the connecting piece has a body part. The dynamic knife is movably arranged on the body part. The top of the body part is protruded to form a sliding connection part. The limiting and pressing part is arranged at the top of the sliding connection part. A guide sliding groove corresponding to the sliding connection part is arranged on the connecting part of the dynamic knife. The sliding connection part is connected with the dynamic knife by extending into the guide sliding groove. The limiting and pressing part pre-presses the part of the connecting part close to the guide sliding groove.

[0007] Preferably, the body part between the sliding connection parts is protruded to form an auxiliary guide end. An auxiliary guide groove corresponding to the auxiliary guide end is arranged on the connecting part of the dynamic knife. The auxiliary guide end is connected with the dynamic knife by extending into the auxiliary guide groove.

[0008] Preferably, the thickness of the body part of the connecting piece is less than the thickness of the limiting and pressing part. The thickness of the body part of the connecting piece is greater than or equal to 0.8mm.

[0009] Preferably, the connecting part of the moving blade is in the shape of a trapezoid, the cutting part is arranged on both sides of the connecting part, the fixed blade has a fixed blade tooth part and a fixed blade body part, the fixed blade tooth part is arranged on both sides of the fixed blade body part, and the fixed blade tooth part and the part of the fixed blade body part close to the fixed blade tooth part extend upwards to form a fixed blade limiting structure for limiting the position of the moving blade on the fixed blade.

[0010] Preferably, a pre-pressing part is arranged on the connecting piece, and the two ends of the pre-pressing part abut against the limiting and pressing part and the connecting part of the moving blade respectively.

[0011] Preferably, the pre-pressing part is integrally formed with the connecting piece, the pre-pressing part has a buckle end, a buckle groove is arranged on the connecting part, the buckle end extends into the buckle groove and is buckled with the moving blade, and the limiting and pressing part is arranged at the bottom of the buckle end and presses the part of the connecting part close to the buckle groove.

[0012] Preferably, a connecting hole is arranged at the top end of the connecting piece, the pre-pressing part has a connecting end and a pre-pressing end, the connecting end extends into the connecting hole and is connected with the connecting piece, and the bottom of the pre-pressing end presses the connecting part of the moving blade.

[0013] Preferably, the pre-pressing part is a ball, a ball groove is arranged on the side of the limiting and pressing part close to the moving blade, the upper part of the pre-pressing part extends into the ball groove and abuts against the limiting and pressing part, and the lower part of the pre-pressing part abuts against the connecting part of the moving blade.

[0014] Preferably, a through hole is arranged through the connecting piece, the pre-pressing part is a roller arranged in the through hole, the two ends of the pre-pressing part extend out of the through hole to form a pre-pressing end, the limiting and pressing part is arranged on the pre-pressing end, and the limiting and pressing part pre-presses the connecting part of the moving blade.

[0015] Preferably, the connecting piece and the fixed blade are arranged in a split structure, and the connecting piece and the fixed blade are fixed by being adhered.

[0016] Preferably, the fixed blade and the connecting piece are integrally formed by injection molding.

[0017] The present application has the advantages that the limiting and pressing part of the connecting piece can press the moving blade and provide pre-pressure for the moving blade, the moving blade itself has a resilient structure in the present design, and thus the moving blade can generate elastic force while deforming when the limiting and pressing part presses the moving blade, so that the moving blade can always adhere to the fixed blade during the process of cutting hair, thereby improving the sharpness of the blade assembly when cutting hair and enabling more efficient cutting of hair. BRIEF DESCRIPTION OF DRAWINGS

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Appendix Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Appendix Figure 2 For the appendix Figure 1 Top view;

[0021] Appendix Figure 3 For the appendix Figure 1 Structural breakdown diagram;

[0022] Appendix Figure 4 For the appendix Figure 2 Sectional view at point AA;

[0023] Appendix Figure 5 This is a schematic diagram of another embodiment;

[0024] Appendix Figure 6 For the appendix Figure 5 Top view;

[0025] Appendix Figure 7 For the appendix Figure 5 Structural breakdown diagram;

[0026] Appendix Figure 8 For the appendix Figure 6 Sectional view at point BB;

[0027] Appendix Figure 9 This is a schematic diagram of another embodiment;

[0028] Appendix Figure 10 For the appendix Figure 9 Structural breakdown diagram;

[0029] Appendix Figure 11 This is a schematic diagram of another embodiment;

[0030] Appendix Figure 12 For the appendix Figure 11 Structural breakdown diagram;

[0031] Appendix Figure 13 This is a schematic diagram of another embodiment;

[0032] Appendix Figure 14 For the appendix Figure 13 Structural breakdown diagram;

[0033] Appendix Figure 15 For the appendix Figure 13Middle C-C cross-sectional view. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only 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 a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0035] The present application will be further described below with reference to the drawings in the description.

[0036] The present application provides the following technical solutions:

[0037] As shown in the accompanying Figures 1-15 The present application discloses a blade assembly, which comprises a static blade 1, a dynamic blade 2 and a connecting piece 3. The dynamic blade 2 has a cutting part 4 and a connecting part 5. The connecting piece 3 has a limiting and pressing part 6, which is in pre-pressing cooperation with the connecting part 5 of the dynamic blade 2. Specifically, in the present design, the limiting and pressing part 6 on the connecting piece 3 can press the dynamic blade 2 to provide a pre-pressing force for the dynamic blade 2. Moreover, the dynamic blade 2 itself in the present design is a structure with elasticity. Therefore, when the limiting and pressing part 6 presses the dynamic blade 2, the dynamic blade 2 can be deformed while generating an elastic force, so that the dynamic blade 2 can always adhere to the static blade 1 during the process of cutting hair, thereby improving the sharpness of the blade assembly when cutting hair and enabling more efficient cutting of hair.

[0038] Further, the connecting piece 3 has a body part 7. The dynamic blade 2 is movably arranged on the body part 7. The body part 7 has two sliding connecting parts 8 protruding from the top ends of the body part 7. The limiting and pressing part 6 is arranged at the top end of the sliding connecting part 8. The connecting part 5 of the dynamic blade 2 is provided with a guide sliding groove 9 corresponding to the sliding connecting part 8. The sliding connecting part 8 extends into the guide sliding groove 9 to connect with the dynamic blade 2. Moreover, the limiting and pressing part 6 pre-presses the part of the connecting part 5 close to the guide sliding groove 9.

[0039] Further, the body part 7 between the sliding connecting parts 8 has an auxiliary guide end 10 protruding therefrom. The connecting part 5 of the dynamic blade 2 is provided with an auxiliary guide groove 11 corresponding to the auxiliary guide end 10. The auxiliary guide end 10 extends into the auxiliary guide groove 11 to connect with the dynamic blade 2. Specifically, in the present embodiment, the auxiliary guide end 10 protruding from the top end of the body part 7 can extend into the auxiliary guide groove 11 on the connecting part 5 to slide with the dynamic blade 2, so that the position of the dynamic blade 2 on the connecting piece 3 is further limited by the auxiliary guide end 10, thereby ensuring that the dynamic blade 2 will not deviate during the reciprocating movement.

[0040] Further, the thickness of the body part 7 of the connecting piece 3 is less than the thickness of the limiting and pressing part 6, and the thickness of the body part 7 of the connecting piece 3 is greater than or equal to 0.8 mm. Specifically, in the embodiment, the preferred thickness of the body part 7 of the connecting piece 3 is 1.5±0.3 mm. In the thickness range, the body part 7 of the connecting piece 3 can ensure smooth support for the moving blade 2, and in the process of high-speed rotation, the temperature rise of the body part 7 of the connecting piece 3 is low and the noise is small.

[0041] Further, the connecting part 5 of the moving blade 2 is in a trapezoidal cross-section, the cutting part 4 is arranged on both sides of the connecting part 5, the static blade 1 has a static blade tooth part 12 and a static blade body part 13, the static blade tooth part 12 is arranged on both sides of the static blade body part 13, and the static blade tooth part 12 and the static blade body part 13 extend upwards from the part close to the static blade tooth part 12 to form a static blade limiting structure 14, which limits the position of the moving blade 2 on the static blade 1. Specifically, in the embodiment, the connecting part 5 in the trapezoidal cross-section has a horizontal part 15 in contact with the connecting piece 3, and two inclined parts 16 arranged on both sides of the horizontal part 15. The inclined direction of the inclined part 16 is inclined to the edge direction of the static blade 1. Such a structure can provide elasticity for the moving blade 2, so that when the moving blade 2 is subjected to the pre-pressure of the limiting and pressing part 6, the inclined part 16 can move away from the horizontal part 15, so that the moving blade 2 is elastically deformed to tightly fit the static blade 1. The static blade limiting structure 14 arranged on the static blade 1 can limit the position of the moving blade tooth part on the static blade 1, prevent the moving blade 2 from being deformed greatly under a large pressure, and prevent the moving blade 2 from being damaged due to the moving blade tooth part passing through the static blade tooth part 12.

[0042] Further, the connecting piece 3 is provided with a pre-pressing piece 17, the two ends of the pre-pressing piece 17 abut against the limiting and pressing part 6 and the connecting part 5 of the moving blade 2 respectively, and the limiting and pressing part 6 is formed on the pre-pressing piece 17. Specifically, in the embodiment, the pre-pressing piece 17 is arranged on the connecting piece 3, and the limiting and pressing part 6 is formed on the pre-pressing piece 17, so that the pre-pressing piece 17 has the effect of providing pre-pressure for the moving blade 2. Such a structure can reduce the contact between the connecting piece 3 and the connecting part 5, thereby reducing the wear of the connecting piece 3, and the limiting and pressing part 6 does not need to be formed on the connecting piece 3, thereby reducing the production and processing difficulty of the connecting piece 3.

[0043] Reference is made to the accompanying drawings Figures 9-10 Further, the pre-pressing piece 17 is integrally formed with the connecting piece 3, the pre-pressing piece 17 has a buckle end 18, the connecting part 5 is provided with a buckle groove 19, the buckle end 18 extends into the buckle groove 19 to buckle connect with the moving blade 2, and the limiting and pressing part 6 is arranged at the bottom of the buckle end 18, and the limiting and pressing part 6 presses the part of the connecting part 5 close to the buckle groove 19.

[0044] Referring to the drawings Figures 5-8 Further, the connecting piece 3 is provided with a connecting hole 20 at the top end, the pre-pressing piece 17 is provided with a connecting end 21 and a pre-pressing end 22, the connecting end 21 is inserted into the connecting hole 20 and connected with the connecting piece 3, and the bottom of the pre-pressing end 22 is pressed against the connecting part 5 of the moving knife 2. Specifically, in this embodiment, the pre-pressing piece 17 and the connecting piece 3 are arranged in a split structure, the connecting end 21 of the pre-pressing piece 17 penetrates through the connecting piece 3 and is connected with the moving knife 2, and the pre-pressing end 22 is pressed against the moving knife 2, and in this embodiment, the limiting and pressing part 6 is formed at the bottom of the pre-pressing end 22, and the pre-pressing end 22 is arranged in a disc structure, and the outer diameter of the pre-pressing end 22 is greater than the thickness of the body part 7 of the connecting piece 3, so as to achieve the limiting effect.

[0045] Referring to the drawings Figures 13-15 Further, the pre-pressing piece 17 is a ball, the limiting and pressing part 6 is provided with a ball groove 23 at the side close to the moving knife 2, the upper part of the pre-pressing piece 17 is inserted into the ball groove 23 and abuts against the limiting and pressing part 6, and the lower part of the pre-pressing piece 17 abuts against the connecting part 5 of the moving knife 2. Specifically, in this embodiment, the pre-pressing piece 17 arranged in a ball structure on the connecting piece 3 can press the connecting part 5 of the moving knife 2, and in this design, the pre-pressing piece 17 arranged in a ball structure can form a point contact with the connecting part 5 of the moving knife 2, so as to reduce the contact area with the moving knife 2, and the wear between the moving knife 2 and the pre-pressing piece 17 is reduced.

[0046] Referring to the drawings Figures 11-12 Further, the connecting piece 3 is provided with a through hole 24, and the pre-pressing piece 17 is a roller arranged in the through hole 24, the two ends of the pre-pressing piece 17 extend out of the through hole 24 to form the pre-pressing end 22, the limiting and pressing part 6 is formed on the pre-pressing end 22, and the limiting and pressing part 6 pre-presses the connecting part 5 of the moving knife 2. Specifically, in this embodiment, the pre-pressing piece 17 arranged in a roller structure on the connecting piece 3 can press the connecting part 5 of the moving knife 2 through the pre-pressing end 22, and in this design, the pre-pressing end 22 is formed by extending from the two ends of the pre-pressing piece 17, so it also has a roller structure, and the pre-pressing piece 17 arranged in a roller structure can form a line contact with the connecting part 5 of the moving knife 2, so as to reduce the contact area with the moving knife 2, and the wear between the moving knife 2 and the pre-pressing piece 17 is reduced.

[0047] Further, the connecting piece 3 and the static knife 1 are arranged in a split structure, and the connecting piece 3 and the static knife 1 are fixed by adhesion. Specifically, the connecting piece 3 and the static knife 1 are also connected by welding, buckling, riveting, secondary injection molding, ultrasonic wave and the like, and the static knife 1 and the connecting piece 3 arranged in a split structure have low production cost and are easy to process.

[0048] In an embodiment, the static knife 1 and the connecting piece 3 are integrally formed by injection molding, and the integrally formed static knife 1 and the connecting piece 3 are stable in structure as a whole, so that the moving knife 2 is not prone to loosening during reciprocating movement on the connecting piece 3.

[0049] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A blade assembly, characterized in that: The device includes a stationary blade, a moving blade, and a connector. The moving blade has a connecting portion, and the connector has a limiting and clamping portion. The limiting and clamping portion is pre-pressed into the connecting portion of the moving blade, pressing the moving blade onto the stationary blade. The connector has a body portion, on which the moving blade is movably mounted. Sliding connecting portions protrude from both sides of the top of the body portion. The limiting and clamping portion is located at the top of the sliding connecting portion. A guide groove corresponding to the sliding connecting portion is formed on the connecting portion of the moving blade. The sliding connecting portion extends into the guide groove and connects with the moving blade, with the limiting and clamping portion close to the guide groove. The grooved portion is pre-compressed, and a pre-compressing component is provided on the connector. The two ends of the pre-compressing component abut against the limiting clamping part and the connecting part of the moving blade, respectively. The pre-compressing component is a ball bearing. A ball bearing groove is formed on the side of the limiting clamping part near the moving blade. The upper part of the pre-compressing component extends into the ball bearing groove and abuts against the limiting clamping part. The lower part of the pre-compressing component abuts against the connecting part of the moving blade. Alternatively, a through hole is provided on the connector. The pre-compressing component is a roller set in the through hole. The two ends of the pre-compressing component extend out of the through hole to form pre-compressing ends. A limiting clamping part is formed on the pre-compressing end. The limiting clamping part pre-compresses the connecting part of the moving blade.

2. The blade assembly according to claim 1, characterized in that: An auxiliary guide end protrudes from the main body between the sliding connecting parts, and an auxiliary guide groove is opened on the connecting part of the moving blade corresponding to the auxiliary guide end. The auxiliary guide end extends into the auxiliary guide groove and connects with the moving blade.

3. The blade assembly according to claim 1, characterized in that: The thickness of the main body of the connector is less than the thickness of the limiting and pressing part, and the thickness of the main body of the connector is ≥0.8mm.

4. The blade assembly according to claim 1, characterized in that: The connecting part of the moving blade has a trapezoidal cross-section, and moving blade teeth are provided on both sides of the connecting part. The stationary blade has stationary blade teeth and a stationary blade body. The stationary blade teeth are provided on both sides of the stationary blade body. The portions of the stationary blade teeth and the stationary blade body that are close to the stationary blade teeth extend upward toward the stationary blade to form a stationary blade limiting structure. The stationary blade limiting structure limits the position of the moving blade on the stationary blade.

5. The blade assembly according to claim 1, characterized in that: The connector and the stationary blade are separate structures, and the connector and the stationary blade are fixed by welding, snap-fitting, riveting or secondary injection molding.

6. The blade assembly according to claim 1, characterized in that: The stationary blade and the connecting part are integrally formed by injection molding.

Images