Practical shaving and scraping knife head structure

Abstract

The utility model relates to an electric shaver, and aims to provide a practical shaver head structure which has the characteristics that a blade is not easy to wear and the noise is low. According to the technical scheme, the practical shaving and scraping knife head structure comprises a knife net and a knife head matched with the knife net and provided with a blade. The cutter net is provided with a positioning shaft, and the cutter head is provided with a positioning hole in running fit with the positioning shaft; the positioning device is characterized in that protruding edges are formed on the hole wall of the positioning hole, and the protruding edges are connected into a circular ring in the circumferential direction and are in running fit with the circumferential surface of the positioning shaft.

Description

Technical Field

[0001] The utility model relates to an electric shaver, in particular to a practical shaving head structure. Background Art

[0002] Electric shavers are a small household appliance that is comfortable, safe, convenient and fast to use, and have become popular in thousands of households. Electric shavers use the shearing principle, which is achieved by the close cooperation of the blade (also called the moving blade) on the blade head and the inner surface of the blade net (also called the static blade). The beard and hair extend from the outside of the blade net into the hole slot of the blade net, and the blade rotates at high speed or reciprocates, forming a relative motion with the blade net, thereby shearing off the extended beard and hair.

[0003] The existing electric shavers have the following defects: the shaver head makes unstable sound and noise when rotating; the blade part has unstable rotation contact when the moving blade rotates, the blade is easily worn and has poor sharpness, which easily causes beard pinching and affects shaving efficiency. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the above-mentioned background technology and provide a practical shaving head structure, which has the characteristics of a blade that is not easily worn and has little noise.

[0005] The technical solution provided by the utility model is:

[0006] A practical shaving head structure comprises a knife net and a knife head matched with the knife net and equipped with a blade; the knife net is provided with a positioning shaft, and the knife head is provided with a positioning hole which is rotatably matched with the positioning shaft; the characteristic is that a ridge is formed on the hole wall of the positioning hole, the ridge is connected to form a circular ring around the circumferential direction and is rotatably matched with the circumferential surface of the positioning shaft.

[0007] There are two protrusions, which are axially spaced a certain distance apart to form two circular rings, so as to ensure the stable rotation of the cutter head during operation.

[0008] The cross-sectional edge of the protrusion is in an arc shape to reduce the friction during rotational engagement.

[0009] The certain distance is 0.5-3 mm.

[0010] The beneficial effects of the utility model are:

[0011] 1. Due to the protrusions formed on the wall of the positioning hole, the friction surface between the positioning shaft and the positioning hole is greatly reduced, which also reduces the friction when the movable knife rotates, effectively reduces the output current of the motor, and extends the shaving time under the condition of the same battery capacity of the whole machine.

[0012] 2. A double-circle ring structure is used on the wall of the positioning hole, which greatly increases the stability during rotation; in the absence of lubricating oil, the sound during shaving rotation can remain basically unchanged (when shaving with existing razors, the blade head will produce various irregular angles according to the irregular shape of the skin surface, resulting in unstable sound).

[0013] 3. The double-circle ring structure can increase the stability of the cutter head during shaving rotation, and the blade will not produce large vibrations, thereby effectively ensuring the sharpness of the blade and greatly increasing the service life of the cutter head; it also reduces unnecessary waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a main structural schematic diagram of an embodiment of the utility model.

[0015] Figure 2 It is a schematic diagram of the top structure of an embodiment of the utility model.

[0016] Figure 3 yes Figure 1 AA cross-sectional structure schematic diagram.

[0017] Figure 4 It is a three-dimensional structural schematic diagram of the cutter head in the embodiment of the utility model.

[0018] Figure 5 yes Figure 3 Schematic diagram of the enlarged structure of part B in FIG.

[0019] Numbers in the figure: knife net 1, positioning shaft 1-1, knife head 2, transmission universal joint 2-1, upper cover 2-1-1, protrusion 2-1-11, spring 2-1-2, connecting part 2-1-3, blade assembly 2-2, blade 2-2-1. DETAILED DESCRIPTION

[0020] The following is a further detailed description in conjunction with the embodiments shown in the accompanying drawings.

[0021] The electric shaver shown in the attached drawings comprises a blade net 1 mounted on a shaver base and a blade head driven by a shaver motor shaft and capable of rotating with the blade net; the blade head comprises a blade assembly 2-2 and a transmission universal joint 2-1 detachably connected between the blade assembly and the shaver motor shaft (the top end of the transmission universal joint is connected to the blade assembly, and the bottom end is connected to the shaver motor shaft), and a plurality of blades 2-2-1 are made on the blade assembly; the transmission universal joint 2-1 is formed by an upper cover 2-1-1, a spring 2-1-2 and a connecting member 2-1-3; the three hooks of the connecting member hook the steps on the inner wall of the upper cover, and the spring is placed between the connecting member and the upper cover to adjust the height of the upper cover when in use. A positioning shaft 1-1 is arranged on the blade net, and a positioning hole is provided at the top end of the transmission universal joint to rotate with the positioning shaft.

[0022] The above structure is similar to the existing razor head (see CN215943018U).

[0023] The improvement made by the utility model is that: a ridge 2-1-11 is formed on the hole wall of the positioning hole, and the ridge is connected to form a ring around the circumferential direction, so as to rotate with the circumferential surface of the positioning shaft.

[0024] There are two protrusions, and the two protrusions are axially spaced a certain distance apart (that is, a certain distance apart in the axial direction of the positioning hole) to form two circles of rings, thereby ensuring the stable rotation of the cutter head during operation.

[0025] The cross-sectional edge of the protrusion is in an arc shape, which can reduce the sliding friction when rotating with the positioning shaft.

[0026] The certain distance is 0.5-3mm, which is determined according to the specific needs.

[0027] The working principle of the utility model is that after the positioning hole is plugged into the positioning shaft of the knife net, the positioning hole wall is only rotated with the circumferential surface of the positioning shaft at the ridged part. Since the friction surface is significantly reduced, the sliding friction resistance is significantly reduced. Since the two ridges are separated by a distance in the axial direction, the radial swing of the positioning shaft during rotation is limited, so the stability of the rotation is guaranteed, and the wear of the blade and the generation of noise are correspondingly reduced.

Claims

1. A practical shaving head structure, comprising a blade net (1) and a blade head (2) matched with the blade net; the blade net is provided with a positioning shaft (1-1), and the blade head is provided with a positioning hole rotatably matched with the positioning shaft; the characteristics are: A protrusion (2-1-11) is formed on the hole wall of the positioning hole, and the protrusion is connected to form a ring around the circumferential direction and is rotationally matched with the circumferential surface of the positioning shaft.

2. The practical shaving head structure according to claim 1, characterized in that: There are two protrusions, which are axially spaced a certain distance apart to form two circular rings, so as to ensure the stable rotation of the cutter head during operation.

3. The practical shaving head structure according to claim 2, characterized in that: The cross-sectional edge of the protrusion is in an arc shape to reduce the friction during rotational engagement.

4. The practical shaving head structure according to claim 3, characterized in that: The certain distance is 0.5-3 mm.

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