Integrated reciprocating cutter head assembly and assembly process thereof

Abstract

The present invention relates to an integrated reciprocating cutter head assembly and its assembly process, which is characterized in that a limiting member is provided at the bottom of the outer tool holder to limit the reciprocating swing of the inner tool holder equipped with the inner blade within the swinging space; a floating mechanism and a removable auxiliary positioning mechanism are provided between the limiting member and the inner tool holder, the auxiliary positioning mechanism fixes the inner tool holder in the outer tool holder so that the highest point of the bending portion of the inner blade is at a predetermined height in the outer tool holder; the two ends of the outer blade are respectively connected to the outer tool holder and a bending portion is formed in the middle thereof based on the bending arc of the inner blade, so that the outer blade, the outer tool holder, the inner blade and the inner tool holder are combined into one and the auxiliary positioning mechanism is removed. The beneficial effect of the present invention is that the limiting member is used to limit the reciprocating swing of the inner tool holder and the inner blade within the outer tool holder, and the outer blade is bent and formed based on the bending portion of the inner blade, which can greatly ensure that the curvature of the outer blade and the inner blade is consistent, ensuring the fit while avoiding the occurrence of hair pulling and hair pulling.

Description

Technical Field

[0001] The present invention relates to a beard trimming device, and more particularly to an integrated reciprocating cutter head assembly and an assembly process thereof, which is mainly used in the fields of shavers and the like. Background Art

[0002] Existing reciprocating cutter head assembly such as the one in Chinese patent CN105328720B Figure 4 As shown in FIG. 2 , the present invention is basically composed of an independent outer blade assembly (41) and an inner blade assembly (42), wherein the outer blade assembly (41) is composed of an outer blade base (45) and an outer blade (44) bent into a U shape along the outer blade base (45); and the inner blade assembly (42) is composed of an inner blade base (47) and an inner blade (46) bent into a U shape along the inner blade base (47).

[0003] During assembly, the inner blade assembly (42) is placed inside the outer blade assembly (41), and in order to ensure the fit between the inner blade (46) and the outer blade (44) and improve the beard trimming performance, pressure springs (1A, 1B) are installed at both ends of the bottom of the inner blade assembly (42). The outer surface of the inner blade (46) is fitted with the inner surface of the outer blade (44) by utilizing the elastic force of the pressure springs (1A, 1B). In this way, not only can the beard trimming performance of the cutter head assembly be ensured, but also the pressure springs (1A, 1B) can be used to realize the inner blade (46) floating up and down and automatically resetting, thereby improving the use safety of the inner blade (46).

[0004] In order to ensure the working stability of the reciprocating cutter head assembly, the two ends of the outer blade assembly (41) are respectively connected to the blade mounting member (43), and the inner blade assembly (42) is placed in the outer blade assembly (41) and the top pressure spring (1A, 1B) is placed between the bottom plate of the blade mounting member (43) and the bottom of the inner blade assembly (42) to drive the inner blade assembly (42) to fit with the outer blade assembly (41), so that the reciprocating cutter head assembly forms an integral whole.

[0005] Since the existing reciprocating cutter head assembly is assembled in an integrated manner through the blade mounting member (43), the material cost of the reciprocating cutter head assembly is relatively increased and the assembly efficiency is reduced. Secondly, the U-shaped bend of the outer blade (44) and the U-shaped bend of the inner blade (41) are formed separately along the corresponding outer blade base (45) and the inner blade base (47), respectively. In this way, the consistency of the U-shaped curvature of the outer blade (44) and the inner blade (41) cannot be guaranteed, resulting in that the U-shaped curved surface of the inner blade (41) cannot be completely fitted with the U-shaped bottom surface of the outer blade (44) during assembly, thereby causing the reciprocating cutter head assembly to produce hair pulling or hair jamming during shaving, thereby reducing the hair cutting performance and use comfort of the cutter head assembly. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention provides an integrated reciprocating cutter head assembly and its assembly process. By optimizing the structure of the reciprocating cutter head assembly and improving the assembly process of the reciprocating cutter head assembly, not only can the integration of the reciprocating cutter head assembly be achieved and the material cost of the cutter head assembly be reduced, but also the fit between the inner blade and the outer blade can be ensured, thereby avoiding the phenomenon of hair pulling or hair jamming during shaving and improving the shaving efficiency.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is an integrated reciprocating cutter head assembly, including an outer blade, an outer blade holder, an inner blade and an inner blade holder. The middle of the inner blade is bent to form a bent portion, and its two ends are respectively connected to the two side walls of the inner blade holder, and the inner blade holder can be placed in the outer blade holder to swing back and forth horizontally. The outer blade holder is closed on all sides to form a swinging space. A limiting member is provided at the bottom of the outer blade holder to limit the reciprocating swing of the inner blade holder installed thereon to within the swinging space; a floating mechanism and a removable auxiliary positioning mechanism are provided between the limiting member and the inner blade holder. The auxiliary positioning mechanism fixes the inner tool holder in the outer tool holder so that the highest point of the curved portion of the inner blade installed on the inner tool holder is at a predetermined height in the outer tool holder; the two ends of the outer blade are respectively connected and fixed to the two side walls of the outer tool holder, and a curved portion is formed in the middle based on the curvature of the inner blade, so that the outer blade, the outer tool holder, the inner blade and the inner tool holder are combined into one and the auxiliary positioning mechanism is removed. The inner tool holder, supported by the floating mechanism, always keeps the outer surface of the curved portion of the inner blade in contact with the inner surface of the curved portion of the outer blade; wherein, the inner blade is made of metal or ceramic material.

[0008] Preferably, the auxiliary positioning mechanism includes a first hook fixedly connected to the limit member and a first slot provided on the inner side walls of the two end plates of the inner tool holder. When the floating mechanism supports the inner tool holder, the first hook is inserted into the first slot so that the highest bending point of the inner blade installed on the inner tool holder is at a predetermined height in the outer tool holder. The two ends of the outer blade are connected and fixed to the two side walls of the outer tool holder and the middle part is bent and formed based on the bending curvature of the inner blade. After the outer blade, outer tool holder, inner blade and inner tool holder are combined into one, the first hook is removed so that the inner tool holder can drive the curved part of the inner blade to always fit the curved part of the outer blade under the support of the floating mechanism.

[0009] Preferably, the auxiliary positioning mechanism includes a positioning column, a positioning hole, a limiting hole and a positioning rod, the positioning column is arranged on the inner surface of the end plate at one end of the outer tool holder, and the positioning hole is arranged in the end plate at the other end of the outer tool holder; the limiting holes are provided on two end plates coaxially arranged at both ends of the inner tool holder; the positioning column is inserted into one of the limiting holes of the inner tool holder, and the positioning rod is inserted into the other limiting hole and the positioning hole so that the highest point of the curved portion of the inner blade installed on the inner tool holder is at a predetermined height of the outer tool holder, and the two ends of the outer blade are respectively connected and fixed to the two side walls of the outer tool holder and the middle part thereof is bent and formed based on the curvature of the inner blade. After the outer blade, outer tool holder, inner blade and inner tool holder are combined into one, the positioning rod is removed and the positioning column is separated from the limiting hole, so that the inner tool holder can always keep the curved portion of the inner blade in contact with the inner surface of the curved portion of the outer blade under the support of the floating mechanism.

[0010] The cam is secured to the outside of the housing by means of a spring, and the cam is secured to the outside of the housing by means of a spring.

[0011] Preferably, the limiting member is integrally injection-molded with the outer tool holder or is detachably connected to the outer tool holder as one body.

[0012] Preferably, the limiting member is provided with two symmetrically arranged at the bottom of the swinging space of the outer tool holder and injection molded integrally with the outer tool holder, which includes a limiting block, each limiting block is respectively placed at the bottom of the swinging space of the outer tool holder and a swinging interval is formed between the two limiting blocks, and is respectively connected and fixed to the inner surface of the two side walls of the outer tool holder and the inner surface of the end plate at the corresponding end through a limiting plate.

[0013] Preferably, the floating mechanism is a pressure spring, and spring columns are respectively provided in the limit block of the limit member and the inner tool holder. The two ends of the pressure spring are respectively placed outside the spring column so that the inner tool holder drives the outer surface of the inner blade to keep in contact with the inner surface of the outer blade under the elastic force of the pressure spring.

[0014] Based on the above-mentioned integrated reciprocating cutter head assembly, the applicant has also proposed an assembly process for improving the fit between the inner blade and the outer blade and ensuring that the curvature of the outer blade and the inner blade is consistent, comprising the following steps:

[0015] S1: Produce outer blade, outer blade holder, inner blade, inner blade holder, floating mechanism, and auxiliary positioning mechanism according to technical requirements;

[0016] S2: Connecting the inner blade to the inner blade holder to form an inner blade component;

[0017] S3: placing the inner blade assembly into the outer tool holder, installing a floating mechanism between the inner tool holder and a limiter in the outer tool holder, and fixing the inner blade assembly in the outer tool holder through an auxiliary positioning mechanism so that the highest point of the curved portion of the inner blade is at a predetermined height in the outer tool holder;

[0018] S4: Connect and fix one side of the outer blade to the side wall corresponding to the outer tool holder, and bend the other side toward the other side of the outer tool holder based on the bending curvature of the inner blade and connect and fix it to the corresponding side of the outer tool holder. After the outer blade, outer tool holder, inner blade, inner tool holder and floating mechanism are combined into one, remove the auxiliary positioning mechanism.

[0019] The beneficial effects of the present invention are:

[0020] 1. By placing a stopper at the bottom of the outer blade holder, the inner blade and inner blade holder are integrated with the outer blade and outer blade holder within the constraints of the outer blade and the stopper. This not only facilitates assembly and installation of the cutter head, improving installation efficiency, but also allows the outer blade and outer blade holder to protect the inner blade, preventing damage to the outer blade or the inner blade's edge when the cutter head assembly is disassembled for cleaning after shaving.

[0021] 2. A floating mechanism is added between the stopper and the inner blade holder. When the outer blade is subjected to the reaction force generated by the hand pressing on the body, the reaction force is simultaneously transmitted to the inner blade and the inner blade holder. The force applied to the inner blade holder overcomes the elastic force of the floating mechanism, driving the inner blade downward. This creates a buffer for the deformation of the outer blade, preventing the outer blade from being crushed or damaging the inner blade's edge. This improves the safety of the cutter head assembly and extends its service life.

[0022] 3. The addition of a removable auxiliary positioning mechanism changes the traditional assembly sequence of the cutter head assembly. This not only allows for the integrated combination of the outer blade, outer blade holder, inner blade, and inner blade holder, but also protects the inner blade with the outer blade and outer blade holder, preventing breakage of the outer blade or damage to the inner blade's edge during cleaning of the cutter head assembly, thus ensuring the safety of the cutter head assembly and extending its service life. Furthermore, when assembling the outer blade, the outer blade is bent based on the inner blade's curved portion, ensuring maximum curvature consistency between the outer and inner blades, improving the fit between the inner and outer blades' outer surfaces and avoiding hair pulling and tugging caused by inconsistent curvature, which can reduce shaving performance.

[0023] 4. This assembly process differs from conventional razor head assembly processes in that an auxiliary positioning mechanism is used to first secure the inner blade holder within the outer blade holder. The curved portion of the inner blade forms the reference for the outer blade's bending and forming. This curved portion of the inner blade then shapes and constrains the outer blade during bending, ensuring that the curvature of the outer blade matches that of the inner blade. This eliminates the problem of hair pulling and tugging caused by the inconsistent curvatures of the outer and inner blades in existing razors, thereby improving the razor's user comfort and shaving performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional structural diagram of the first embodiment of the integrated reciprocating cutter head assembly of the present invention

[0025] Figure 2 A cross-sectional structural diagram of the assembly using the auxiliary positioning mechanism in the first embodiment

[0026] Figure 3 This is a cross-sectional view of the assembly structure of the first embodiment with the auxiliary positioning mechanism removed.

[0027] Figure 4 This is a longitudinal sectional structural diagram of the integrated reciprocating cutter head assembly of the present invention.

[0028] Figure 5 The bottom perspective structural diagram of the outer tool holder in the first embodiment

[0029] Figure 6 A three-dimensional structural diagram of the second embodiment of the integrated reciprocating cutter head assembly of the present invention

[0030] Figure 7 A cross-sectional structural diagram of the assembly using the auxiliary positioning mechanism in the second embodiment

[0031] Figure 8 The assembly cross-sectional view of the second embodiment with the auxiliary positioning mechanism removed

[0032] Figure 9A three-dimensional structural diagram of the third embodiment of the integrated reciprocating hair head assembly of the present invention

[0033] Figure 10 A cross-sectional structural diagram of the assembly using the auxiliary positioning mechanism in the third embodiment

[0034] Figure 11 This is a cross-sectional view of the assembly structure of the third embodiment with the auxiliary positioning mechanism removed.

[0035] Figure 12 A three-dimensional structural diagram of the auxiliary positioning mechanism in the third embodiment DETAILED DESCRIPTION

[0036] The embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0037] like Figure 1-12 As shown, the present invention is an integrated reciprocating cutter head assembly comprising an outer blade 1, an outer blade holder 2, an inner blade 3, and an inner blade holder 4. The inner blade 3 is curved in the middle to form a curved portion, with its ends connected to the side walls of the inner blade holder 4. To prevent technical issues such as the frequent assembly, shaving, disassembly, cleaning, and reassembly of the inner blade 3 and the outer blade 1 during daily shaving, which may cause the cutting edge of the inner blade 3 to be easily damaged by external factors, the outer blade holder 2 is enclosed on all sides to form a swing space. A limit member 5 is provided at the bottom of the outer blade holder 2 to restrict the reciprocating swing of the inner blade holder 4, equipped with the inner blade 3, within the swing space when driven by a drive mechanism (not shown). The limiting member 5 is set at the bottom of the outer blade holder 2, and the outer blade 1 needs to be installed on the top of the outer blade holder 2. Under the restriction of the outer blade 1 and the limiting member 5, the inner blade 3, the inner blade holder 4, the outer blade 1, the outer blade holder 2 and the floating mechanism 7 can be combined into one, which not only facilitates the assembly and installation of the cutter head and improves the installation efficiency; at the same time, the outer blade 1 and the outer blade holder 2 can also be used to protect the inner blade 3 to prevent the outer blade 1 from being damaged or the blade of the inner blade 3 from being damaged when the cutter head assembly is disassembled for cleaning after shaving is completed.

[0038] In order to avoid damage to the outer blade 1 or the inner blade 3 after being subjected to force and to improve the fit between the outer blade 1 and the inner blade 3, a floating mechanism 7 and a removable auxiliary positioning mechanism 6 are provided between the limiter 5 and the inner blade holder 4. The auxiliary positioning mechanism 6 fixes the inner blade holder 4 in the outer blade holder 2 so that the highest point of the curved part of the inner blade 3 installed on the inner blade holder 4 is at a predetermined height in the outer blade holder 2; the two ends of the outer blade 1 are respectively connected and fixed to the two side walls of the outer blade holder 2, and a curved part is formed in the middle based on the curvature of the inner blade 3, so that the outer blade 1, the outer blade holder 2, the inner blade 3 and the inner blade holder 4 are combined into one and the auxiliary positioning mechanism 6 is removed. With the support of the floating mechanism 7, the inner blade holder 4 always keeps the outer surface of the curved part of the inner blade 3 in fit with the inner surface of the curved part of the outer blade 1. During the shaving process, the outer blade 1 comes into contact with the skin surface when the user presses the body with his hand (not shown in the figure). Under the influence of the reaction force of the hand pressing, the outer blade 1 will deform toward the inside of the cutter head assembly, and the inner blade 3 is in contact with the outer blade 1. Under the reaction force and the top pressure of the inner blade 3, the outer blade 1 is very likely to be compressed and damaged or the blade of the inner blade 3 is damaged. A floating mechanism 7 is added between the limiter 5 and the inner blade holder 4. When the outer blade 1 is subjected to the reaction force generated by the hand pressing the body, the reaction force will be synchronously transmitted to the inner blade 3 and the inner blade holder 4. The force on the inner blade holder 4 will overcome the elastic force of the floating mechanism 7 and drive the inner blade 3 to move downward, leaving buffer space for the deformation of the outer blade 1, avoiding the outer blade 1 from being compressed and damaged or damaging the blade of the inner blade 3, thereby improving the safety of the cutter head assembly and extending the service life of the cutter head assembly. Secondly, the addition of a removable auxiliary positioning mechanism 6 can change the assembly order of the traditional cutter head assembly, which can not only realize the integrated combination of the outer blade 1, the outer blade holder 2, the inner blade 3 and the inner blade holder 4, but also use the outer blade 1 and the outer blade holder 2 to protect the inner blade 3, to prevent the outer blade 1 from being damaged or the blade of the inner blade 3 from being damaged when the outer blade holder 2 and the outer blade 1 are disassembled for cleaning after shaving is completed, thereby ensuring the safety of the cutter head assembly and extending its service life; and when assembling the outer blade 1, the inner blade 3 can be bent and formed based on the curved portion of the inner blade 3, to ensure the consistency of the curvature of the curved portions of the outer blade 1 and the inner blade 3 to the greatest extent, to improve the fit between the outer surface of the inner blade 3 and the inner surface of the outer blade 1, to avoid defects such as hair pulling, hair tugging or hair jamming due to different curvatures, and to ensure the shaving performance and comfort of the cutter head assembly.

[0039] Special note: Removable means that after the outer blade 1 is installed, the outer blade 1, the outer blade holder 2, the inner blade 3, the inner blade holder 4 and the floating mechanism 7 are combined into one, and then the auxiliary positioning mechanism 6 is removed to prevent the auxiliary positioning mechanism 6 from interfering with the operation of the inner blade holder 4 and the inner blade 3.

[0040] Under the above concept of using the auxiliary positioning mechanism 6 to ensure the consistency of the curvature of the curved portions of the outer blade 1 and the inner blade 3, and to improve the fit of the outer blade 1 and the inner blade 3 and to realize an integrated reciprocating cutter head assembly, the applicant also proposes the following three implementation methods of the auxiliary positioning mechanism 6:

[0041] Example 1

[0042] like Figure 1-5 As shown, the auxiliary positioning mechanism 6 includes a first hook 61 fixedly connected to the limit member 5 and a first slot 62 set on the inner side wall of the two end plates 21 of the inner tool holder 4. When the floating mechanism 7 supports the inner tool holder 4, the first hook 61 is inserted into the first slot 62 to place the highest bending point of the inner blade 3 installed on the inner tool holder 4 at a predetermined height in the outer tool holder 2. The two ends of the outer blade 1 are connected and fixed to the two side walls of the outer tool holder 2, and the middle part is bent and formed based on the bending curvature of the inner blade 3. After the outer blade 1, the outer tool holder 2, the inner blade 3 and the inner tool holder 4 are combined into one, the first hook 61 is removed so that the inner tool holder 4 drives the curved portion of the inner blade 3 to always fit the curved portion of the outer blade 1 under the support of the floating mechanism 7. In actual production, the first hook 61 is fixed to the stopper 5. After the outer blade 1 is bent and formed based on the curved portion of the inner blade 3 and secured to the outer blade holder 2, the first hook 61 fixed to the stopper 5 is cut using a tool such as scissors. Once the inner blade holder 4 loses the restraint of the first hook 61, the floating mechanism 7 takes effect, supporting the inner blade holder 4 so that the outer surface of the inner blade 3 always maintains contact with the inner surface of the outer blade 1. During shaving, the floating mechanism 7 not only ensures the contact between the inner blade 3 and the outer blade 1, improving shaving performance and efficiency, but also preventing hair pulling and ripping, thereby enhancing the user comfort of the razor. Furthermore, when the outer blade 1 is subjected to significant skin pressure, it can contract downward, driving the inner blade holder 4 and the inner blade 3 downward, providing a buffer for deformation of the outer blade 1. This prevents the outer blade 1 from being broken by the inner blade 3 under pressure and damaging the cutting edge of the inner blade 3, thereby improving the safety of the outer blade 1 and the inner blade 3. Secondly, the inner blade holder 4 and the inner blade 3 are restricted in the outer blade holder 2 and combined into one by the cooperation of the outer blade 1 and the limit member 5. When the outer blade holder 2 and the outer blade 1 are disassembled for cleaning after shaving, the outer blade holder 2 of the outer blade 1 can effectively protect the inner blade 3, effectively preventing damage to the outer blade 1 or damage to the blade of the inner blade 3, ensuring the safety of the use of the cutter head assembly and extending its service life.

[0043] Example 2

[0044] like Figure 6-8As shown, the auxiliary positioning mechanism 6 includes a positioning column 63, a positioning hole 64, a limiting hole 65 and a positioning rod 66. The positioning column 63 is arranged on the inner surface of the end plate 21 at one end of the outer tool holder 2, and the positioning hole 64 is arranged in the end plate 21 at the other end of the outer tool holder 2; the limiting hole 65 is provided on two end plates 21 coaxially arranged at both ends of the inner tool holder 4; when assembling, first insert the positioning column 63 on one end plate 21 of the outer tool holder 2 into the limiting hole 65 on one end plate 21 of the inner tool holder 4 to fix one end of the inner tool holder 4 to the outer tool holder 2, and at the other end of the outer tool holder 2 and the inner tool holder 4, use the positioning rod 66 to insert the positioning hole 64 of the outer tool holder 2 and the limiting hole 65 of the inner tool holder 4 The other end of the inner blade holder 4 is fixed to the outer blade holder 2 in the hole 65, so that the inner blade holder 4 is completely fixed in the swing space of the outer blade holder 2, and the highest point of the curved portion of the inner blade 3 installed on the inner blade holder 4 is at a predetermined height in the outer blade holder 2. Then, the outer blade 1 is bent and formed based on the curved portion of the inner blade 3 and connected and fixed to the two side walls of the outer blade holder 2, so that the outer blade holder 2, the outer blade 1, the inner blade holder 4 and the inner blade 3 are combined into one. At this time, the positioning rod 66 is pulled out and the positioning column 63 is driven to separate from the limiting hole 65. In this way, the inner blade holder 4 can always keep the outer surface of the inner blade 3 in contact with the inner surface of the outer blade 1 under the support of the floating mechanism 7. During the shaving process, the floating mechanism 7 can not only ensure the fit between the inner blade 3 and the outer blade 1, but also improve the shaving performance and shaving efficiency, avoid the phenomenon of hair pulling and hair pulling, and improve the comfort of using the razor. Furthermore, when the outer blade 1 is subjected to greater pressure from the skin, it can contract downward, driving the inner blade holder 4 and the inner blade 3 to move downward, providing a certain buffer space for the deformation of the outer blade 1, thereby preventing the outer blade 1 from being broken by the inner blade 3 after being compressed and damaging the cutting edge of the inner blade 3, thereby improving the safety of the outer blade 1 and the inner blade 3. Secondly, through the cooperation of the outer blade 1 and the limiter 5, the inner blade holder 4 and the inner blade 3 are restrained in the outer blade holder 2 and combined into one. When the outer blade holder 2 and the outer blade 1 are removed for cleaning after shaving, the outer blade 1 and the outer blade holder 2 can effectively protect the inner blade 3, effectively preventing damage to the outer blade 1 or the cutting edge of the inner blade 3, ensuring the safety of the cutter head assembly and extending its service life.

[0045] Example 3

[0046] like Figure 9-12As shown, the auxiliary positioning mechanism 6 includes a limit plate 67, a limit rod 68 and a tension spring 69. The limit rod 68 is provided with two spaced-apart arrangements and respectively passes through the limit plate 67 so that its two ends are placed outside the limit plate 67. A second hook 681 is provided at the end of the outer surface of the upper end of the two limit rods 68, and a spring seat 682 is provided on the inner surface of the upper end. The two ends of the tension spring 69 are sleeved outside the spring seat 682 so that the upper end of the limit rod 68 is stretched open so that the second hook 681 is clamped into the second slot 683 provided on the inner tool holder 4, so that the highest point of the curved portion of the inner blade 3 installed on the inner tool holder 4 is at the outermost position. At a predetermined height inside the tool holder 2, the two ends of the outer blade 1 are respectively connected and fixed to the two side walls of the outer tool holder 2 and the middle part is bent and formed based on the bending curvature of the inner blade 3. After the outer blade 1, the outer tool holder 2, the inner blade 3 and the inner tool holder 4 are combined into one, the external force acts on the lower end of the limit rod 68 to overcome the elastic force of the tension spring 69 at the upper end of the limit rod 68, so that the second hook 681 is disengaged from the second slot 683 and the limit plate 67 and the limit rod 68 are removed. Under the support of the floating mechanism 7, the inner tool holder 4 drives the outer surface of the inner blade 3 to always keep in contact with the inner surface of the outer blade 1. During assembly, first fit the limit plate 67 with the bottom plane of the outer tool holder 2, and the limit rod 68 at the upper end of the limit plate 67 can pass through the swing groove between the two limit members 5 at the bottom of the outer tool holder 2 and be placed in the outer tool holder 2, and then place the floating mechanism 7 and the inner tool holder 4 in the swing space of the outer tool holder 2, and the upper end of the limit rod 68 opens the two limit rods 68 outward under the elastic force of the tension spring 69, so that the second hook 681 on the outer side surface of the end is inserted into the second slot 683 provided in the reinforcing wall of the inner tool holder 4, so that the inner tool holder 4 is fixed in the swing space of the outer tool holder 2 under the restriction of the limit rod 68, and at the same time, the inner tool holder 4 is fixed in the swing space of the outer tool holder 2 under the restriction of the limit rod 68. The highest point of the curved portion of the inner blade 3 on the holder 4 is at a predetermined height within the outer blade holder 2. Then, the outer blade 1 is installed, and the outer blade 1 is bent and formed based on the curved portion of the inner blade 3. After the outer blade holder 2, outer blade 1, inner blade 3, inner blade holder 4 and floating mechanism 7 are combined into one, the two limit rods 68 are pinched toward the center with the fingers to separate the second hook 681 from the second slot 683. At this time, the limit rod 68 and the limit plate 67 can be pulled out from the outer blade holder 2. The inner blade holder 4, supported by the floating mechanism 7, presses the inner blade 3 so that the outer surface of the inner blade 3 always remains in contact with the inner surface of the outer blade 1. During the shaving process, the floating mechanism 7 not only ensures the close contact between the inner blade 3 and the outer blade 1, improving the shaving performance and shaving efficiency, but also avoids the phenomenon of hair pulling and tugging, thereby improving the comfort of using the razor. Moreover, when the outer blade 1 is subjected to a greater skin squeezing pressure, it can contract downward to drive the inner blade holder 4 and the inner blade 3 to move downward, providing a certain buffer space for the deformation of the outer blade 1, thereby preventing the outer blade 1 from being broken by the inner blade 3 and damaging the blade of the inner blade 3 after being compressed, thereby improving the safety of use of the outer blade 1 and the inner blade 3.Secondly, the inner blade holder 4 and the inner blade 3 are restricted in the outer blade holder 2 and combined into one by the cooperation of the outer blade 1 and the limit member 5. When the outer blade holder 2 and the outer blade 1 are disassembled for cleaning after shaving, the outer blade 1 and the outer blade holder 2 can effectively protect the inner blade 3, effectively preventing the damage of the outer blade 1 or the blade of the inner blade 3, thereby ensuring the safety of the use of the cutter head assembly and extending its service life.

[0047] Under the overall concept of combining the outer tool holder 2, the outer blade 1, the inner tool holder 4, and the inner blade 3 into one, the position limiting member 5 can be integrally injection molded with the outer tool holder 2 or detachably connected to the outer tool holder 2. Each method has its own advantages and disadvantages. The position limiting member 5 and the outer tool holder 2 are produced by an integral injection molding process. The production efficiency of the outer tool holder 2 is relatively high, but it is only applicable to the outer tool holder 2 made of plastic. If the outer tool holder 2 is made of metal, it is more appropriate to use a detachable position limiting member 5. Although the position limiting member 5 and the outer tool holder 2 can also be connected as one through a welding process, this will relatively increase the production and processing costs. Therefore, the specific method of connecting the position limiting member 5 to the outer tool holder 2 can be determined according to the user's requirements and is not further restricted in this embodiment.

[0048] To improve the production efficiency of the outer tool holder 2, the stopper 5 includes two symmetrically positioned at the bottom of the swinging space of the outer tool holder 2 and is integrally injection-molded with the outer tool holder 2. Each stopper 51 is positioned at the bottom of the swinging space of the outer tool holder 2, forming a swinging gap between the two stoppers 51. The stoppers 51 are connected and secured to the inner surfaces of the two side walls of the outer tool holder 2 and the inner surface of the end plate 21 at the corresponding end via stopper tabs 52. Two stoppers 51 are provided, spaced apart. During installation, the drive shaft of the drive mechanism can be positioned in the swinging gap between the two stoppers 51, linked to the inner tool holder 4, and drive the inner tool holder 4 and inner blade 3 to reciprocate within the swinging space. To ensure the strength of the connection between the stoppers 51 and the outer tool holder 2, in actual production, stoppers 52 are provided on three sides of the stopper 51, each stopper tab 52 being integrally molded with the inner surfaces of the two side walls of the outer tool holder 2 and the inner surface of the end plate 21 at the corresponding end. Of course, depending on the desired purpose, the positioning pieces 52 can also be provided on opposite sides of the positioning block 51 to securely connect the positioning block 51 to the outer blade holder 2. However, providing the positioning pieces 52 in three directions provides a higher connection strength, and therefore, this embodiment is the preferred embodiment. In actual production, the first hook 61 of the auxiliary positioning mechanism 6 in Example 1 is integrally injection molded with the positioning piece 52 that connects the positioning block 51 to the end plates 21 at both ends of the outer blade holder 2. After the outer blade 1 is installed, it can be cut off using a tool such as scissors.

[0049] During shaving, to prevent the outer blade 1 from being subjected to excessive force and being broken or damaged by the inner blade 3, the floating mechanism 7 is a pressure spring. A spring column 41 is provided in the limit block 51 of the limit member 5 and the inner blade holder 4. The two ends of the pressure spring are respectively placed outside the spring column 41, so that the inner blade holder 4 is driven by the elastic force of the pressure spring to keep the outer surface of the inner blade 3 in contact with the inner surface of the outer blade 1. To achieve the up and down floating function of the inner blade 3 and the inner blade holder 4, the pressure spring can be omitted. For example, a metal spring can also be provided to achieve the purpose. However, since the spring is a standard part, its cost is relatively low. Therefore, the embodiment of this embodiment is the preferred embodiment.

[0050] On the basis of the above-mentioned integrated reciprocating cutter head assembly, an assembly process is proposed to improve the fit between the inner blade 3 and the outer blade 1 and ensure the consistency of the curvature of the curved portion of the outer blade 1 and the curved portion of the inner blade 3, including the following steps:

[0051] S1: According to technical requirements, different materials, sizes and processes are selected to manufacture the outer blade 1, the outer blade holder 2, the inner blade 3, the inner blade holder, the floating mechanism 7 and the auxiliary positioning mechanism 6. Since the existing outer blade 1, the outer blade holder 2, the inner blade 3, the inner blade holder 4 and the floating mechanism 7 are mature process components of existing razors, they will not be described in detail here. The difference between this step and the process of existing razors is that the auxiliary positioning mechanism 6 is added to facilitate the subsequent assembly of the inner blade holder 4 and the outer blade 1;

[0052] S2: Connect the inner blade 3 to the inner blade holder 4 to form the inner blade 3 component. The inner blade 3 used in existing razors is generally made of metal material. Therefore, it needs to be bent and formed before being fixed to the two side walls of the inner blade holder 4. However, some razors use ceramic materials as the inner blade 3. If ceramic materials are used, the inner blade 3 is integrally formed and does not require bending.

[0053] S3: Place the inner blade 3 component into the outer tool holder 2, install a floating mechanism 7 between the inner blade holder 4 and the limiter 5 in the outer tool holder 2, and fix the inner blade 3 component in the outer tool holder 2 through the auxiliary positioning mechanism 6, so that the highest point of the bent portion of the inner blade 3 is at a predetermined height in the outer tool holder 2, and use the auxiliary positioning mechanism 6 to fix the inner tool holder in the outer tool holder 2, so that the bent portion of the inner blade 3 installed on the inner tool holder 4 can form a reference for the bending forming of the outer blade 1 during assembly;

[0054] S4: One side of the outer blade 1 is connected and fixed to the side wall corresponding to the outer blade holder 2, and the other side is bent and formed toward the other side of the outer blade holder 2 based on the curvature of the inner blade 3 and connected and fixed to the corresponding side of the outer blade holder 2. The outer blade 1, outer blade holder 2, inner blade 3, inner blade holder 4 and floating mechanism 7 are combined into one body, and the auxiliary positioning mechanism 6 is removed (for the removal of the auxiliary positioning mechanism 6, please refer to the above three embodiments, which will not be repeated here). The connection and fixation refers to providing a plurality of rivet columns 22 on the two side walls of the outer blade holder 2, providing rivet holes at corresponding positions at both ends of the outer blade 1, and riveting the two ends of the outer blade 1 to the two side walls of the outer blade holder 2 through a hot riveting process. The curvature of the outer blade 1 is based on the curvature of the inner blade 3. When the outer blade is bent and formed, the curvature of the outer blade 1 and the curvature of the inner blade 3 are effectively guaranteed to be consistent. In addition, with the support of the floating mechanism 7, the outer surface of the inner blade 3 can always keep in contact with the inner surface of the outer blade 1. In this way, during the shaving process, it can effectively prevent the inner blade 3 and the outer blade 1 from pulling or tugging hair, thereby improving the comfort of using the razor.

[0055] The difference between this assembly process and the traditional assembly process of the cutter head assembly is that the auxiliary positioning mechanism 6 is used to first fix the inner blade holder 4 in the outer blade holder 2, and the curved portion of the inner blade 3 forms a reference for the bending of the outer blade 1, and the curved portion of the inner blade 3 is used to shape and constrain the bending of the outer blade 1, thereby ensuring that the curvature of the outer blade 1 is consistent with the curvature of the inner blade 3, solving the problem of hair pulling and tugging caused by the inconsistent curvature caused by the separate bending of the outer blade 1 and the inner blade 3 of the existing razor, thereby improving the shaving performance and comfort of the razor.

[0056] The above embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims

1. An integrated reciprocating cutter head assembly, comprising an outer blade (1), an outer blade holder (2), an inner blade (3) and an inner blade holder (4), wherein the inner blade (3) is bent in the middle to form a curved portion, and its two ends are respectively connected to the two side walls of the inner blade holder (4), and the inner blade holder (4) can be placed in the outer blade holder (2) so as to swing back and forth horizontally; characterized in that The outer tool holder (2) is enclosed on all sides to form a swinging space inside. A limiting member (5) is provided at the bottom of the outer tool holder (2) to limit the reciprocating swing of the inner tool holder (4) equipped with the inner blade (3) within the swinging space. A floating mechanism (7) and a removable auxiliary positioning mechanism (6) are provided between the limiting member (5) and the inner tool holder (4). The auxiliary positioning mechanism (6) fixes the inner tool holder (4) in the outer tool holder (2) so that the highest point of the curved portion of the inner blade (3) installed on the inner tool holder (4) is at a predetermined height in the outer tool holder (2). The outer blade (1) is fixed at both ends to the two side walls of the outer blade holder (2), and a curved portion is formed at the middle thereof based on the curved curvature of the inner blade (3), so that the outer blade (1), the outer blade holder (2), the inner blade (3) and the inner blade holder (4) are combined into one body and the auxiliary positioning mechanism (6) is removed. The inner blade holder (4) is supported by the floating mechanism (7) so that the outer surface of the curved portion of the inner blade (3) always fits the inner surface of the curved portion of the outer blade (1); wherein the inner blade (3) is made of metal or ceramic material.

2. The integrated reciprocating cutter head assembly according to claim 1, characterized in that The auxiliary positioning mechanism (6) comprises a first hook (61) fixedly connected to the limiting member (5) and a first slot (62) provided on the inner side wall of the two end plates (21) of the inner blade holder (4); when the floating mechanism (7) supports the inner blade holder (4), the first hook (61) is engaged with the first slot (62) so that the highest bending point of the inner blade (3) installed on the inner blade holder (4) is at a predetermined height in the outer blade holder (2); the two ends of the outer blade (1) are connected and fixed to the two side walls of the outer blade holder (2); the middle part thereof is bent and formed based on the bending curvature of the inner blade (3); after the outer blade (1), the outer blade holder (2), the inner blade (3) and the inner blade holder (4) are combined into one, the first hook (61) is removed so that the inner blade holder (4) is driven by the floating mechanism (7) to always keep the bending portion of the inner blade (3) in contact with the bending portion of the outer blade (1).

3. The integrated reciprocating cutter head assembly according to claim 1, characterized in that The auxiliary positioning mechanism (6) includes a positioning column (63), a positioning hole (64), a limiting hole (65) and a positioning rod (66). The positioning column (63) is arranged on the inner surface of the end plate (21) at one end of the outer tool holder (2), and the positioning hole (64) is arranged in the end plate (21) at the other end of the outer tool holder (2); the limiting holes (65) are arranged on two end plates (21) coaxially arranged at both ends of the inner tool holder (4); the positioning column (63) is inserted into one of the limiting holes (65) of the inner tool holder (4), and the positioning rod (66) is inserted into the other limiting hole (65) and the positioning hole (64) so ​​as to be installed on the inner tool holder The highest point of the curved portion of the inner blade (3) on (4) is at a predetermined height of the outer blade holder (2), the two ends of the outer blade (1) are respectively connected and fixed to the two side walls of the outer blade holder (2), and the middle part thereof is bent and formed based on the curvature of the inner blade (3). After the outer blade (1), the outer blade holder (2), the inner blade (3) and the inner blade holder (4) are combined into one, the positioning rod (66) is removed and the positioning column (63) is separated from the limiting hole (65), so that the inner blade holder (4) can always keep the curved portion of the inner blade (3) in contact with the inner surface of the curved portion of the outer blade (1) under the support of the floating mechanism (7).

4. The integrated reciprocating cutter head assembly according to claim 1, characterized in that The auxiliary positioning mechanism (6) includes a limit plate (67), a limit rod (68) and a tension spring (69). The limit rod (68) is provided with two spaced-apart rods that respectively pass through the limit plate (67) so that both ends are placed outside the limit plate (67). A second hook (681) is provided at the outer surface end of the upper end of the two limit rods (68). A spring seat (682) is provided on the inner surface of the upper end. The two ends of the tension spring (69) are sleeved outside the spring seat (682) so that the upper end of the limit rod (68) is stretched open so that the second hook (681) is clamped into the second slot (683) provided on the inner tool holder (4) so ​​that the highest point of the curved portion of the inner blade (3) installed on the inner tool holder (4) is located on the outer tool holder. (2) At a predetermined height, the two ends of the outer blade (1) are respectively connected and fixed to the two side walls of the outer blade holder (2) and the middle part thereof is bent and formed based on the bending curvature of the inner blade (3). After the outer blade (1), the outer blade holder (2), the inner blade (3) and the inner blade holder (4) are combined into one, an external force acts on the lower end of the limit rod (68) to overcome the elastic force of the tension spring (69) at the upper end of the limit rod (68) so that the second hook (681) is separated from the second slot (683) and the limit plate (67) and the limit rod (68) are removed. Under the support of the floating mechanism (7), the inner blade holder (4) drives the outer surface of the inner blade (3) to always keep in contact with the inner surface of the outer blade (1).

5. The integrated reciprocating cutter head assembly according to claim 1, characterized in that The limiting member (5) is integrally injection-molded with the outer tool holder (2) or is detachably connected to the outer tool holder (2) as a whole.

6. The integrated reciprocating cutter head assembly according to claim 1, characterized in that The limiting member (5) is provided with two symmetrically arranged at the bottom of the swing space of the outer tool holder (2) and is integrally injection-molded with the outer tool holder (2), and includes a limiting block (51), each limiting block (51) is respectively placed at the bottom of the swing space of the outer tool holder (2) and a swing interval is formed between the two limiting blocks (51), and is respectively connected and fixed to the inner surface of the two side walls of the outer tool holder (2) and the inner surface of the end plate (21) at one end corresponding to the limiting piece (52).

7. The integrated reciprocating cutter head assembly according to any one of claims 1 to 6, characterized in that The floating mechanism (7) is a pressure spring. A spring column (41) is provided in the limit block (51) of the limit member (5) and the inner blade holder (4). Both ends of the pressure spring are respectively sleeved outside the spring column (41) so that the inner blade holder (4) drives the outer surface of the inner blade (3) to keep in contact with the inner surface of the outer blade (1) under the elastic force of the pressure spring.

8. The assembly process of the integrated reciprocating cutter head assembly is characterized by The following steps are involved: S1: Producing an outer blade (1), an outer blade holder (2), an inner blade (3), an inner blade holder, a floating mechanism (7) and an auxiliary positioning mechanism (6) according to technical requirements; S2: connecting the inner blade (3) and the inner blade holder (4) to form an inner blade (3) component; S3: placing the inner blade (3) component into the outer blade holder (2), installing a floating mechanism (7) between the inner blade holder (4) and the limiting member (5) in the outer blade holder (2), and fixing the inner blade (3) component in the outer blade holder (2) through the auxiliary positioning mechanism (6) so that the highest point of the curved portion of the inner blade (3) is at a predetermined height in the outer blade holder (2); S4: One side of the outer blade (1) is connected and fixed to the side wall corresponding to the outer blade holder (2), and the other side is bent and formed toward the other side of the outer blade holder (2) based on the curvature of the inner blade (3) and connected and fixed to the corresponding side of the outer blade holder (2), and the outer blade (1), the outer blade holder (2), the inner blade (3), the inner blade holder (4) and the floating mechanism (7) are combined into one body, and the auxiliary positioning mechanism (6) is removed.

Images