Reciprocating knife head

Abstract

A reciprocating cutter head includes a mounting base, a stationary cutter integrally formed from a flexible metal sheet, a moving cutter adapted to the stationary cutter and equipped with a cutting edge, and a reciprocating transmission component. The mounting base is formed by two connecting units connected and fixed left and right. Each connecting unit includes a base with two connecting arms and a stop plate raised at the end of the base. The distance between the two connecting units corresponds to the length of the stationary cutter. A fixing platform protrudes from the inner side wall of the stop plate and is adapted to each of the two supports. The ends of the connecting arms are provided with insertion devices for inserting and fixing the two connecting units. The two connecting units are inserted and fixed through the insertion devices on the connecting arms. A limiting connecting device for fixing the stationary cutter is provided on the fixing platform. The suspension of the fixing platform can stably connect the stationary cutter while leaving more hollow cavity volume, avoiding the lower opening of the stationary cutter, and is friendly to stationary cutters with irregular cross-sections, especially those with curved cutting surfaces.

Description

Technical Field

[0001] This utility model relates to a reciprocating razor head for personal hygiene, and more particularly to an electric reciprocating razor head. Background Technology

[0002] Reciprocating razors on the market consist of a fixed blade, a plastic support base, and a moving blade assembly. The fixed blade support, used to hold the fixed blade in place, is typically a single unit to ensure stability. Installing the moving blade mechanism within this one-piece fixed blade support is space-constrained, and can only be assembled vertically. This assembly method is particularly unsuitable for fixed blades made of flexible, thin metal sheets, especially those with curved, skin-friendly surfaces and non-vertical side support surfaces. Vertical assembly disrupts the intended curvature, potentially causing the fixed blade to break, and increasing costs. Furthermore, one-piece fixed blade supports are inconvenient to transport. Existing separate fixed blade support connections are not stable enough and prone to disengagement. As for the blade head's oscillation, a Y-shaped support oscillation structure that engages with the left and right side walls of the fixed blade support is generally used. This structure limits the lateral length of the blade head; increasing the length of the cutting assembly inevitably increases the volume of the Y-shaped structure. The large space occupied by the Y-shaped support oscillation structure makes the entire razor appear particularly bulky. The blade is located in the middle of the Y-shaped support swing structure, between the two support arms of the Y-shaped support structure, which is not conducive to the cutting component protruding so as to facilitate contact with the skin for cutting. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a tool support that offers adequate support for stationary tools, has a good feel, stable structure, and is easy to process and assemble.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a reciprocating cutter head, comprising a mounting base, a stationary cutter integrally formed from a flexible metal sheet, a moving cutter adapted to the stationary cutter and equipped with a cutting edge, and a reciprocating transmission component. The mounting base is formed by two connecting units connected and fixed from the left and right. The moving cutter and the reciprocating transmission component are installed in a hollow cavity formed by the mounting base and the stationary cutter. The connecting unit includes a base with two connecting arms and a stop provided at the end of the base. The distance between the two connecting units corresponds to the length of the stationary cutter. A fixing platform adapted to the end of the stationary cutter is suspended on the inner side wall of the stop. The end of the connecting arm is provided with a plug-in device for inserting and fixing the two connecting units. The two connecting units are plugged and fixed through the plug-in device on the connecting arm. A central through hole is formed in the center of the mounting base for the lower part of the reciprocating transmission component to pass through. A limiting connecting device for fixing the stationary cutter is provided on the fixing platform.

[0005] As an improvement: the lower part of the base hoop is integrally formed with two symmetrical hanging lugs. A swing bracket is movably connected to the lower part of the two hanging lugs through a coupling structure. The swing bracket is provided with two opposing mounting arms. The mounting arms are rotatably connected to the mounting seat through the coupling structure. A transmission component for connecting the reciprocating transmission component and the external drive device is rotatably sleeved at the center of the swing bracket.

[0006] As an improvement: the transmission assembly includes a cylindrical rotating sleeve rotatably connected in the center hole of the swing bracket, an eccentric shaft fixed on the rotating sleeve, and a groove opened at the bottom of the rotating sleeve and connected to an external drive device for driving. The eccentric shaft cooperates with the reciprocating transmission component. The external drive device drives the rotating sleeve, and the rotation of the eccentric shaft drives the reciprocating transmission component to move left and right.

[0007] As an improvement: the upper part of the rotating sleeve is provided with several suspension feet extending out of the outer periphery of the rotating sleeve body, and the rotating sleeve body achieves rotatable installation of the rotating component in the central hole by the cooperation of the several suspension feet with the central hole on the swing bracket along the periphery.

[0008] As an improvement, the suspension foot and the center hole on the swing bracket are in line contact fit along the circumference.

[0009] As an improvement, an elastic structure is provided between the two hanging lugs and the swing bracket. The elastic structure is used to prevent the mounting seat from swinging relative to the swing bracket and to drive the mounting seat to swing back to its original position after the mounting seat rotates.

[0010] As an improvement: the bottom surface of the base is integrally formed with a hoop platform, which is arranged around the outer periphery of the central through hole. The clamping member is installed on the lower part of the base in a fully enclosed or semi-enclosed manner around the outer periphery of the hoop platform. That is, the clamping member at least partially encloses the left and right connecting units in the horizontal direction around the outer periphery of the hoop platform, and the two connecting units of the mounting base are locked by the clamping member.

[0011] As an improvement, the outer edge of the clamp is provided with several hooks facing upwards or towards the center through hole, thereby locking the clamping member in the mounting seat.

[0012] This utility model has the following advantages compared with the prior art:

[0013] 1. The mounting base adopts a left and right split connection and fixation, which facilitates the split transportation. In terms of assembly, it is assembled and fixed from both sides to the center sleeve, avoiding the lower opening of the stationary knife. It is friendly and adaptable to stationary knives with irregular cross sections, especially those with curved cutting skin-friendly surfaces.

[0014] 2. The suspension of the fixed platform can securely connect the stationary blade while leaving more hollow cavity volume, reducing unnecessary collisions between the cutting blade assembly and the mounting base, greatly reducing vibration and improving the feel.

[0015] 3. The limiting connection device for fixing the stationary knife is set on the suspended fixed platform, which facilitates the embedding of the limiting connection device, i.e., it is not exposed. The downward suspension of the fixed platform also allows the edge of the stationary knife to directly abut against the connection between the inner side of the stop and the fixed platform. Furthermore, due to the relationship between the left and right connecting mounting seats, a gap can be formed at the connection between the stop and the fixed platform, which hides and protects the side edge of the stationary knife. It is easy to process and implement.

[0016] 4. This utility model can ensure that the stationary blade is not damaged, the reciprocating blade head is assembled without screws, and even achieve glue-free and threadless connection. It is environmentally friendly and the connection is stable. The internal structure is clear, compact and reasonable.

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a reciprocating cutter head according to an embodiment of the present invention.

[0019] Figure 2 for Figure 1 A schematic diagram of the explosion structure.

[0020] Figure 3 This is a schematic diagram of the transmission assembly.

[0021] Figure 4 for Figure 3 A schematic diagram of the explosion structure. Detailed Implementation

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, one embodiment of the reciprocating cutter head of this utility model includes a mounting base 9, a stationary blade 1 integrally formed from a flexible metal sheet, a moving cutting blade 3 adapted to the stationary blade and equipped with a cutting edge, and a reciprocating transmission component 6. The mounting base 9 is formed by two connecting units connected and fixed on the left and right. The moving cutting blade 3 and the reciprocating transmission component 6 are installed in a hollow cavity formed by the mounting base and the stationary blade. The connecting unit includes a base 91 with two connecting arms and a stop 93 raised at the end of the base 91. The distance between the two connecting units corresponds to the length of the stationary blade. A fixing platform 92 adapted to the end side of the stationary blade or the end side of the stationary blade support is protruding and suspended on the inner side wall of the stop. The end of the connecting arm is provided with a plug-in device for plugging and fixing the two connecting units. The plug-in device includes plug-in holes and plug-in posts respectively provided on the two connecting arms of the connecting unit. The connecting arms of the left and right connecting units are staggered and plugged into the plug-in holes and plug-in posts to form a mounting base.

[0023] The two connecting units are plugged and fixed by the plugging device on the connecting arm, and a central through hole 99 is formed in the center of the mounting base 9 for the lower part of the reciprocating transmission component 6 to pass through. A limiting connecting device for fixing the stationary knife is provided on the fixing platform.

[0024] The base 91 has an integrally formed clamping platform 95 on its lower surface. The clamping platform 95 is located around the outer periphery of the central through hole 99. The clamping member 8 is installed on the lower part of the base 91 in a fully or partially enclosed manner around the outer periphery of the clamping platform 95. That is, the clamping member 8 at least partially encloses the left and right connecting units laterally around the outer periphery of the clamping platform 95, locking the two connecting units of the mounting base 9 through the clamping member. The clamping platform facilitates the assembly of the clamping member 8. For ease of indication, the clamping platform in this embodiment is exposed to the clamping member. In practice, it can be hidden or covered to improve aesthetics. The clamping member 8 can be a bent spring. In this embodiment, the outer edge of the clamping platform 95 has several hooks 98 facing upwards or towards the central through hole 99, thereby locking the clamping member to the mounting base 9. The hooks 98 serve to position the clamping member 8. Based on the plug-in device, the clamping member 8 adds an extra layer of security for lateral stable connection.

[0025] In this embodiment, the base 91 and the lower part of the clamp 95 are integrally formed with two symmetrical hanging lugs 96. A swing bracket 5 is movably connected to the two hanging lugs 96 below the base via a coupling structure. The swing bracket 5 has two opposing mounting arms 51, which are rotatably connected to a mounting base 9 via the coupling structure. A transmission assembly for connecting the reciprocating transmission component 6 and the external drive device is rotatably fitted at the center of the swing bracket 5. This embodiment uses two hanging lugs 96 in the middle of the bottom of the mounting base, forming a swingable support connection through the swing bracket. This design minimizes space usage, highlights the skin-friendly cutting component, improves contact performance with the skin, and has a simple structure that is easy to implement and reduces costs.

[0026] The transmission assembly includes a cylindrical rotating sleeve 71 rotatably connected within the central hole of the swing bracket 5, an eccentric shaft 72 fixed to the rotating sleeve, and a groove 73 located at the bottom of the rotating sleeve 71 and connected to an external drive device for driving. The eccentric shaft 72 cooperates with the reciprocating transmission component 6. The external drive device drives the rotating sleeve 71, which in turn rotates via the eccentric shaft 72 to drive the reciprocating transmission component 6 to move left and right. An elastic structure is provided between the two hanging lugs 96 and the swing bracket. This elastic structure prevents the mounting base from swinging relative to the swing bracket and drives the mounting base to swing back to its original position after rotation. The leaf spring formed by bending the elastic structure in this embodiment allows the upper cutting component of the blade to swing within a certain angle range and automatically reset. When mounted on the handle, it facilitates shaving different parts of the body at different angles while holding the handle. The swinging motion provides a certain degree of damping flexibility, greatly reducing the stiffness of the swing and improving the shaving feel.

[0027] The rotating sleeve 71 has three suspension feet 74 extending outward from its outer periphery. In this embodiment, the suspension feet 74 are integrally formed with the rotating sleeve 71, while the eccentric shaft 72 can be fixed and extended through internal limiting of the rotating sleeve. The rotating sleeve 71 achieves rotatable installation of the rotating component within the central hole of the swing bracket through the circumferential engagement of the suspension feet 74 with the central hole of the swing bracket. The lower bottom surface of the suspension feet 74 is arc-shaped, and the suspension feet 74 and the central hole of the swing bracket are in line contact or point contact engagement. Of course, the sleeve groove 73 and the lower bottom surface of the swing bracket 5 can also be in line contact or point contact. This design features low power loss, smooth operation, low noise, convenient assembly, compact and simple structure, aesthetic appeal, and easy manufacturing.

[0028] 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 cutter head, comprising a mounting base (9), a stationary cutter (1) integrally formed from a flexible metal sheet, a moving cutter (3) adapted to the stationary cutter and having a cutting edge, and a reciprocating transmission component (6), characterized in that: The mounting base (9) is formed by connecting and fixing two connecting units on the left and right. The cutting moving blade (3) and the reciprocating transmission component (6) are installed in the hollow cavity formed by the mounting base and the stationary blade. The connecting unit includes a base (91) with two connecting arms and a baffle (93) raised at the end of the base (91). The distance between the two connecting units corresponds to the length of the stationary blade. A fixing platform (92) adapted to the end of the stationary blade is suspended on the inner side wall of the baffle. The end of the connecting arm is provided with a plug-in device for plugging and fixing the two connecting units. The two connecting units are plugged and fixed by the plug-in device on the connecting arm. A central through hole (99) is formed in the center of the mounting base (9) for the lower part of the reciprocating transmission component (6) to pass through. A limiting connecting device for fixing the stationary blade is provided on the fixing platform.

2. The reciprocating cutter head according to claim 1, characterized in that: The base (91) is integrally formed with two symmetrical hanging ear blocks (96) on the lower part. A swing bracket (5) is movably connected to the base below the two hanging ear blocks (96) through a coupling structure. The swing bracket (5) is provided with two opposing mounting arms (51). The mounting arms (51) are rotatably connected to the mounting seat (9) through the coupling structure. A transmission component for connecting the reciprocating transmission component (6) and the external drive device is rotatably sleeved at the center of the swing bracket (5).

3. The reciprocating cutter head according to claim 2, characterized in that: The transmission assembly includes a cylindrical rotating sleeve (71) rotatably connected in the center hole of the swing bracket (5), an eccentric shaft (72) fixed on the rotating sleeve, and a groove (73) opened at the bottom of the rotating sleeve (71) and connected to the external drive device for driving. The eccentric shaft (72) cooperates with the reciprocating transmission component (6). The external drive device drives the rotating sleeve (71) to rotate through the eccentric shaft (72) to drive the reciprocating transmission component (6) to move left and right.

4. The reciprocating cutter head according to claim 3, characterized in that: The upper part of the rotating sleeve (71) is provided with several hanging feet (74) extending out of the outer periphery of the rotating sleeve (71). The rotating sleeve (71) is rotatably installed in the center hole by the cooperation of several hanging feet (74) with the center hole of the swing bracket along the periphery.

5. The reciprocating cutter head according to claim 4, characterized in that: The suspension foot (74) is in line contact with the center hole on the swing bracket along the circumference.

6. The reciprocating cutter head according to claim 2, 3, 4, or 5, characterized in that: An elastic structure is provided between the two hanging lugs (96) and the swing bracket. The elastic structure is used to prevent the mounting seat from swinging relative to the swing bracket and to drive the mounting seat to swing back after the mounting seat rotates.

7. The reciprocating cutter head according to claim 1, 2, 3, 4, or 5, characterized in that: The base (91) is integrally formed with a hoop (95) on its bottom surface. The hoop (95) is arranged along the outer periphery of the central through hole (99). The clamping member (8) is installed on the lower part of the base (91) in a fully enclosed or semi-enclosed manner along the outer periphery of the hoop (95). That is, the clamping member (8) at least partially encloses the left and right connecting units in the horizontal direction along the outer periphery of the hoop (95), and the two connecting units of the mounting base (9) are locked by the clamping member.

8. The reciprocating cutter head according to claim 6, characterized in that: The base (91) is integrally formed with a hoop (95) on its bottom surface. The hoop (95) is arranged along the outer periphery of the central through hole (99). The clamping member (8) is installed on the lower part of the base (91) in a fully enclosed or semi-enclosed manner along the outer periphery of the hoop (95). That is, the clamping member (8) at least partially encloses the left and right connecting units in the horizontal direction along the outer periphery of the hoop (95), and the two connecting units of the mounting base (9) are locked by the clamping member.

9. The reciprocating cutter head according to claim 7, characterized in that: The outer edge of the clamp (95) is provided with several hooks (98) facing upward or towards the center through hole (99), thereby locking the clamping member to the mounting base (9).

10. The reciprocating cutter head according to claim 8, characterized in that: The outer edge of the clamp (95) is provided with several hooks (98) facing upward or towards the center through hole (99), thereby locking the clamping member to the mounting base (9).

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