A seesaw-limited razor head and a seesaw-limited razor

Abstract

The present invention discloses a seesaw-limited razor head and a seesaw-limited razor head. The seesaw-limited razor head includes a razor head housing, a blade assembly seat, a pressure member, a movable blade, and a stationary blade. A raised protrusion on the razor head housing contacts a swing-limiting groove formed by a bottom edge of one side of the blade assembly seat and a side edge of the movable blade, thereby limiting the horizontal swing position and providing support. This allows the movable blade to tilt toward the stationary blade at a fulcrum, and cooperates with a torsion spring to further improve the tightness of the movable blade's contact with the stationary blade. This allows the movable blade to swing along a straight line trajectory on both sides under the restriction of the protrusion, reducing friction between the movable blade and the stationary blade, stabilizing the interleaving distance between the cutting areas of the movable blade and the stationary blade, and improving cutting stability.

Description

Technical Field

[0001] The present invention relates to the technical field of razor head structures, and in particular to a seesaw-limited razor head and a seesaw-limited razor. Background Art

[0002] As a daily care tool for the people, electric shavers have become one of the essential daily necessities in the family.

[0003] Existing electric shavers mainly use reciprocating blades or rotating blades to cut beards. The reciprocating blade uses a moving blade that swings left and right to cooperate with a stationary blade to cut. However, in actual use, due to tolerances in the manufacturing of the moving blade, it is difficult to tightly fit the moving blade to the stationary blade by simply relying on a torsion spring. In addition, because the end of the torsion spring overlaps the moving blade, there is a lack of a supporting structure for the moving blade, causing the moving blade to swing in an arc trajectory. The cutting area of the moving blade often changes, resulting in poor cutting effect, large vibration, and serious heating of the stationary blade. Summary of the Invention

[0004] To this end, it is necessary to provide a seesaw-limited razor head and a seesaw-limited razor to solve the problem in the existing technology that the movable blade swings along the arc direction, the friction is large, and the arc swing and the tolerance of the movable blade cause the loose fit with the static blade, resulting in unstable cutting.

[0005] To achieve the above-mentioned purpose, the inventor provides a seesaw-limited razor head, comprising a head housing, a blade assembly seat, a pressure member, a movable blade, and a stationary blade;

[0006] The cutter head housing is provided with a protrusion and an abutting plane, wherein the protrusion is arranged toward the forward direction of the cutter head housing, and the abutting plane is arranged at the end portion of the protrusion in the forward direction;

[0007] The blade assembly seat is connected to the movable blade;

[0008] The pressure member contacts the top surface of the blade assembly seat;

[0009] The movable blade is in transmission connection with the power source, and a cutting area is provided on the movable blade, a side edge of the movable blade contacts the abutment plane, and the cutting area is in contact with the stationary blade;

[0010] The stationary blade is connected to the cutter head housing.

[0011] Furthermore, the blade assembly seat further includes a limiting rod, both ends of which are connected to both sides of the blade assembly seat, and the limiting rod is in contact with the top of the protrusion.

[0012] Furthermore, the movable blade also includes a blade transmission groove, which is arranged on the movable blade and is connected to the power source transmission. The bottom of the blade transmission groove and the movable blade form a swing limit groove, and the swing limit groove contacts the side and top surface of the abutment plane.

[0013] Furthermore, the cutting area of the movable blade is tilted toward the stationary blade.

[0014] Furthermore, a pressure member positioning groove is provided on the top surface of the blade assembly seat, and both ends of the groove body of the pressure member positioning groove are arranged toward the front-rear direction of the blade assembly seat.

[0015] Furthermore, the movable blade further includes a blade oil groove, which extends toward the stationary blade and contacts the stationary blade.

[0016] Furthermore, the pressure member is a torsion spring, which is sleeved on the cutter head housing. The torsion spring is provided with a pressure rod, and the bottom of the pressure rod is in contact with the top surface of the blade assembly seat.

[0017] Furthermore, the side edge of the stationary blade is adapted to the protrusion of the cutter head housing through a groove.

[0018] Furthermore, it also includes a movable blade reset spring, one end of which is in contact with the blade assembly seat, and the other end of which is in contact with the cutter head housing.

[0019] To achieve the above-mentioned purpose, the inventors also provide a seesaw-limited razor, comprising a razor body and a seesaw-limited razor head;

[0020] The shaver body is provided with a power source;

[0021] The movable blade of the seesaw position-limiting razor head is transmission-connected to the power source of the razor body, and the seesaw position-limiting razor head is the seesaw position-limiting razor head in the above embodiment.

[0022] Compared to existing technologies, the above-mentioned technical solution has the following advantages: by providing a protrusion and abutment plane on the cutter head housing, contacting the bottom edge of one side of the blade assembly seat and the swing limit groove formed by the side of the movable blade, the horizontal swing position is restricted and supported, allowing the movable blade to tilt toward the stationary blade at a fulcrum. The torsion spring further improves the tightness of the movable blade's contact with the stationary blade. This allows the movable blade to swing along a straight line on both sides within the confines of the abutment plane, reducing friction between the movable and stationary blades, stabilizing the interleaving distance between the cutting areas of the movable and stationary blades, and improving cutting stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the overall structure of a seesaw-type limiting razor head according to an embodiment of the present invention;

[0024] Figure 2 Schematic diagram of the cross-sectional structure of a seesaw-limited razor head in an embodiment of the present invention;

[0025] Figure 3 Schematic diagram of the internal structure of a seesaw-type limiting razor head according to an embodiment of the present invention;

[0026] Figure 4 Schematic diagram of the bottom structure of the cutter head housing in an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 10. Cutting head housing;

[0029] 11. Abutment plane;

[0030] 20. Blade assembly seat;

[0031] 21. Limit rod; 22. Positioning groove for pressure piece;

[0032] 30. Pressure piece;

[0033] 31. Pressure rod;

[0034] 40. Moving blade;

[0035] 41. Blade transmission slot; 43. Cutting area;

[0036] 44. Moving blade return spring;

[0037] 50. Static blade;

[0038] 60. Swing limit slot. DETAILED DESCRIPTION

[0039] In order to explain the technical content, structural features, achieved objectives and effects of the technical solution in detail, the following is a detailed description in conjunction with specific embodiments and accompanying drawings.

[0040] Please also refer to Figure 1 、 Figure 2 、 Figure 3 as well as Figure 4This embodiment discloses a rocker-limited razor head, comprising a head housing 10, a blade assembly seat 20, a pressure member 30, a movable blade 40, and a stationary blade 50. The head housing 10 is provided with a protrusion and an abutment plane 11, wherein the protrusion faces the forward direction of the head housing 10, and the abutment plane 11 is provided at the end of the protrusion. The blade assembly seat 20 is connected to the movable blade 40, and the side of the movable blade 40 contacts the side of the abutment plane 11; the pressure member 30 contacts the top surface of the blade assembly seat 20; the movable blade 40 is connected to the power source and is provided with a cutting area 43, which is provided in the forward direction of the movable blade 40, and the pressure member 30 abuts the top surface of the blade assembly seat 20 between the cutting area 43 and the swing limit groove 60. The cutting area 43 is in contact with the stationary blade 50; and the stationary blade 50 is connected to the head housing 10 by bolts.

[0041] According to the above structure, during the assembly and operation of the rocker-limited razor head, the pressure member applies downward pressure from the top of the blade assembly seat. The movable blade connected to the blade assembly seat is subjected to the pressure of the pressure member, and the cutting area of the movable blade is pressed downward and contacts the area of the stationary blade corresponding to the guide groove. The cutting area of the movable blade contacts and is pressed against the stationary blade. The position where the pressure member abuts between the cutting area and the abutment plane causes the swing limit groove to tilt downward and contact the side of the abutment plane. The cutting area uses the swing limit groove and the position where the pressure member abuts the movable blade along the abutment plane as a fulcrum, causing the movable blade to swing within a limited range from the abutment plane. The movable blade tilts toward the cutting area and further toward the stationary blade, so that the cutting area of the movable blade is pressed tightly against the stationary blade, compressing any random deformation of the cutting area during manufacturing of the movable blade and preventing the formation of gaps. By providing a raised abutment surface on the cutter head housing, contacting the swing limit groove formed by the bottom edge of one side of the blade assembly seat and the side of the movable blade, the horizontal swing position is restricted and supported, allowing the movable blade to tilt toward the stationary blade at a fulcrum. The torsion spring further improves the tightness of the movable blade's contact with the stationary blade. The movable blade swings along a straight line on both sides under the restriction of the raised surface, reducing friction between the movable and stationary blades, stabilizing the interleaving distance between the cutting areas of the movable and stationary blades, and improving cutting stability.

[0042] Please also refer to Figure 1 、 Figure 2 as well as Figure 3In certain preferred embodiments, the blade assembly seat 20 further includes a limiting rod 21, the ends of which are connected to the two sides of the blade assembly seat 20. The bottom of the limiting rod 21, located between the two sides of the blade assembly seat 20, contacts the top of the protrusion. During operation of the rocker-limited razor head, the gap between the top of the protrusion and the bottom of the razor head housing forms a swinging space for the limiting rod. During use, when the blade assembly seat is pressed downward by the pressure of the pressure member, the contact area between the limiting rod and the top surface of the protrusion limits the downward stroke of the blade assembly seat. This prevents the movable blade and the blade assembly seat from being extended by the pressure member and rotating unrestricted toward the stationary blade during detachment of the stationary blade, thereby facilitating assembly and disassembly of the rocker-limited razor head. The swinging stroke of the movable blade is controlled by the razor head housing and the protrusion.

[0043] Please also refer to Figure 1 、 Figure 2 as well as Figure 3 The movable blade 40 also includes a blade drive slot 41, which is disposed on the movable blade 40 and is in driving connection with the eccentric shaft of the shaver body motor. The bottom surface of the blade drive slot 41 and the rearward edge of the movable blade 40 form a swing limit slot 60, which aligns with the side edges and top surface of the end of the abutment plane 11. (In this embodiment, the power source is the electric motor of the shaver body, which is equipped with a power output shaft. The power output shaft may be an eccentric shaft structure, or an eccentric drive shaft assembly may be provided on the power output shaft and be in driving connection with the blade drive slot 41.) The ends of the blade drive slot 41 are oriented in the front-to-back direction of the rocker-limited shaver head, so that the slots on both sides contact the eccentric shaft structure and swing, driving the movable blade to swing in both directions. By arranging the blade drive slot to contact the side and top surfaces of the abutment plane, the contact stability of the movable blade and the protrusion is improved, facilitating the power source to drive the movable blade to swing in both directions.

[0044] See also Figure 2 In certain preferred embodiments, the cutting area 43 of the movable blade 40 is tilted toward the stationary blade 50, and the cutting area 43 aligns with the guide groove area of the stationary blade 50. By providing a cutting area that is tilted and aligned with the stationary blade, the contact area of the end of the movable blade is reduced, avoiding the problem of the entire movable blade contacting the stationary blade, which would cause significant friction and affect the swing. The reduced contact area of the movable blade with the stationary blade allows for greater pressure on the movable blade's cutting area. This allows any curved areas of the movable blade's cutting area to be pressed against the stationary blade during the manufacturing process, avoiding the problem of gaps that would reduce cutting efficiency.

[0045] Please also refer to Figure 1 、 Figure 2 as well as Figure 3In certain preferred embodiments, a pressure member positioning groove 22 is provided on the top surface of the blade assembly seat 20, with both ends of the pressure member positioning groove 22 facing the front-to-back direction of the blade assembly seat 20. The pressure member 30 is a torsion spring, which is sleeved on the cutter head housing 10 and provided with a pressure rod 31. The bottom of the pressure rod 31 contacts the pressure member positioning groove 22 provided on the top surface of the blade assembly seat 20. The pressure member positioning groove provided in the front-to-back direction allows the bottom surface of the pressure rod of the torsion spring, which acts as a pressure member, to apply pressure to the blade assembly seat and the movable blade. During the downward pressure process, the bottom surface of the pressure rod of the torsion spring contacts the pressure member positioning groove, avoiding the blade assembly deviation caused by the different lengths of the pressure rod ends when the ends of the two pressure rods of the torsion spring are connected to the pressure member positioning groove. The sliding structure of the bottom surface of the pressure rod avoids the problem of the pressure rod end driving the movable blade to make an arc movement when the end limit swings. Furthermore, by opening a pressure piece positioning groove downward on the top surface of the blade assembly seat, the structural strength of the groove body is ensured and the service life of the structure is ensured.

[0046] Please also refer to Figure 1 、 Figure 2 as well as Figure 3 In certain preferred embodiments, the movable blade 40 further includes a movable blade oil groove connected to the movable blade, extending toward the stationary blade 50, and contacting the upper surface of the stationary blade 50. During operation, the blade oil groove stores lubricating oil and contacts the stationary blade through the lubricating oil. This provides support for the movable blade during its swing, reduces friction caused by the increased contact surface, improves the swing efficiency of the movable blade, and reduces vibration and heat generation.

[0047] In some preferred embodiments, a groove is provided on the side of the static blade, and a protrusion that matches the groove is provided on the cutter head housing. During the assembly and fixation of the static blade, the groove and the protrusion overlap with each other, so that the assembly of the static blade and the cutter head housing has an anti-fool function and realizes the positioning of the assembly position.

[0048] In the above embodiment, the cutter head housing is threadedly connected to the static blade, and specifically, can be fixed by bolts or screws.

[0049] In certain preferred embodiments, a movable blade return spring 44 is further included, one end of which contacts the blade assembly 20 and the other end contacts the cutter head housing 10. During use, a support structure is provided within the razor body that allows for linear progressive positioning, with the end of the support structure contacting the blade assembly. During use, when the cutting position of the movable blade on the stationary blade needs to be adjusted, the support structure of the razor body advances or retracts along the length of the return spring. The blade assembly, overcoming or under the action of the spring force, drives the movable blade to move on the stationary blade, thereby adjusting the overlap between the cutting area of the movable blade and the area of the stationary blade corresponding to the guide groove.

[0050] In the above embodiment, the pressure member adopts a torsion spring structure. In some preferred embodiments, the pressure member may also adopt a spring or spring plate structure, and the two ends of the spring or spring plate structure respectively abut against the cutter head housing and the blade assembly seat.

[0051] Please also refer to Figure 1 、 Figure 2 as well as Figure 3 In the above embodiment, the blade assembly seat 20 is a U-shaped frame structure, with the limiting rods 21 arranged across both sides of the U-shaped frame. The U-shaped blade assembly seat facilitates the use of the hollow portion of the U-shaped frame to make way for the blade transmission slot connected to the movable blade. The U-shaped frame is then connected to the movable blade via the connecting structure between the two sides, achieving a transmission connection to the movable blade. Mounting holes for the blade return spring are provided at the ends of the two side structures of the U-shaped frame. The blade return spring is placed in the mounting holes, fully utilizing the frame structure and reducing space occupied within the cutter head.

[0052] In the above embodiment, the shaver body of the seesaw limit type shaver can adopt a handle structure with a power supply and a motor, the handle structure is provided with a shaver head assembly area, the limit type shaver head is assembled on the assembly area of the handle, and the movable blade of the seesaw limit type shaver head and the power source of the seesaw limit type shaver are connected.

[0053] Here, we define the directions of front and back, both sides, side edges, top surface and bottom surface. The forward direction is the direction pointed by the moving blade cutting area, and the rear direction is the opposite direction to the forward direction on the horizontal plane. In actual use, the direction in which the moving blade cutting area moves on the skin during the user's pushing is the forward direction, and the rear of the front and back direction is the direction opposite to the forward direction; the two sides are the two directions perpendicular to the front and back directions on the horizontal plane; the sides are the abutting plane and the side surfaces of the moving blade facing the front and back direction, the top surface is the top side of the front and back direction in the height direction, and the bottom surface is the bottom side of the front and back direction in the height direction.

[0054] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection of the present invention. Therefore, based on the innovative concept of the present invention, changes and modifications to the embodiments described herein, or equivalent structural or equivalent process transformations made using the contents of the present invention's specification and drawings, and direct or indirect application of the above technical solutions to other related technical fields, are all included in the scope of patent protection of the present invention.

Claims

1. A seesaw limited razor head, characterized in that: It includes a cutter head housing, a blade assembly seat, a pressure piece, a moving blade and a stationary blade; The cutter head housing is provided with a protrusion and an abutting plane, wherein the protrusion is arranged toward the forward direction of the cutter head housing, and the abutting plane is arranged at the end of the protrusion; The blade assembly seat is connected to the movable blade, and a pressure member positioning groove is provided on the top surface of the blade assembly seat, and both ends of the groove body of the pressure member positioning groove are arranged toward the front and rear directions of the blade assembly seat; The blade assembly seat further includes a limiting rod, the two ends of which are connected to the two sides of the blade assembly seat, the limiting rod contacts the top of the protrusion, and the gap between the top of the protrusion and the bottom of the cutter head housing forms a swing space for the limiting rod; The movable blade further comprises a blade transmission groove, which is provided on the movable blade and is transmission-connected to the power source, wherein the bottom of the blade transmission groove and the rearward edge of the movable blade form a swing limiting groove, and the swing limiting groove contacts the side edge and the top surface of the abutting plane; The pressure member contacts the top surface of the blade assembly seat; The movable blade is transmission-connected to the power source, and a cutting area is provided on the movable blade. The side of the movable blade contacts the abutment plane, and the cutting area is in contact with the stationary blade. The position where the pressure member located between the cutting area and the abutment plane abuts causes the swing limit groove to tilt downward, so that the movable blade is limited and swung by the abutment plane, and the movable blade tilts toward the cutting area and further toward the stationary blade. The stationary blade is connected to the cutter head housing.

2. The rocker-limited razor head according to claim 1, characterized in that: The cutting area of the movable blade is tilted toward the stationary blade.

3. The rocker-limited razor head according to claim 1, characterized in that: The movable blade further includes a blade oil groove, which extends toward the stationary blade and contacts the stationary blade.

4. The rocker-limited razor head according to claim 1, characterized in that: The pressure member is a torsion spring, which is sleeved on the cutter head housing. The torsion spring is provided with a pressure rod, and the bottom of the pressure rod contacts the top surface of the blade assembly seat.

5. The rocker-limited razor head according to claim 1, characterized in that: The side edge of the stationary blade is matched with the protrusion of the cutter head housing through the groove.

6. The rocker-limited razor head according to claim 1, characterized in that: The movable blade reset spring is also included. One end of the movable blade reset spring is in contact with the blade assembly seat, and the other end is in contact with the cutter head housing.

7. A seesaw-type limiting shaver, characterized in that: It includes a razor body and a rocker-limited razor head; The shaver body is provided with a power source; The movable blade of the seesaw-limited razor head is transmission-connected to the power source of the razor body, and the seesaw-limited razor head is the seesaw-limited razor head according to any one of claims 1-6.

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