Cutting unit and cutter head assembly

Abstract

The present invention provides a cutting unit and a cutter head assembly. The cutting unit includes a mounting frame, an outer blade, and a metal heat dissipation component. The mounting frame is provided with a blade cavity that passes through the upper and lower ends thereof. The outer blade is installed in the blade cavity and exposed to the upper end of the mounting frame. The metal heat dissipation component is provided on the mounting frame, and the metal heat dissipation component at least partially surrounds the circumference of the outer blade. The provided metal heat dissipation component is in contact with the skin, so that when the skin contacts the metal heat dissipation component, it will feel cool. In addition, the metal heat dissipation component is no longer in contact with other electric components that generate heat. Therefore, when the outer blade is working and generates high temperature that causes discomfort to the skin, the metal heat dissipation component effectively absorbs the heat on the skin and dissipates it, thereby improving the comfort of use.

Description

Technical Field

[0001] The present invention belongs to the technical field of personal care products, and in particular relates to a cutting unit and a cutter head assembly. Background Art

[0002] The blade assembly of a rotary shaver generally has one or more cutting units, and each cutting unit also has one or more cutting units sharing a common facing bracket. The one or more cutting units and the one or more facing brackets together constitute the skin contact surface. Most existing facing brackets are made of engineering plastics. The skin contact surface in the facing bracket also includes a large amount of plastic surface. Due to the objective properties of engineering plastics, when shaving, there will be a sticky and uncomfortable feeling when the skin contacts the plastic surface, and it will also cause skin redness and other phenomena, which seriously affect the shaving experience. In addition, when the shaver is working, the high-speed relative rotation and friction between the blades in the cutting unit causes the cutting unit to quickly heat up. When the skin contacts the cutting unit, this high temperature will cause skin discomfort.

[0003] A Chinese patent (publication number CN203831434U) discloses an ice-cool rotary head shaver, which achieves heat dissipation by providing a combination of a heat dissipation element, a thermocouple, and a cooling element. The thermocouple is connected to the power supply mechanism inside the shaver, and the cooling element is connected to the heat dissipation element via the thermocouple. The cooling element is exposed around the outer blades. The portion of the cooling element exposed to the outer blades is in contact with the skin. The heat is then transferred to the heat dissipation element via the thermocouple, and finally the heat is dissipated to the outside of the shaver via the heat dissipation element. However, this technical solution only ideally assumes that the heat in the cooling element will be transferred to the heat dissipation element via the thermocouple. In reality, since the thermocouple is connected to the power supply mechanism, a certain amount of heat will be generated when the thermocouple is in operation. Since both the heat dissipation element and the cooling element are connected to the thermocouple, part of the heat generated by the thermocouple will be transferred to the cooling element, resulting in direct heat transfer to the skin. In particular, when the shaver is used for a long time, this part of the heat will more obviously cause the skin to feel hot, reducing the user's comfort when shaving. Furthermore, the shaver with this structure requires a large amount of power due to the addition of a thermocouple, which in turn significantly reduces the usage time of the product. Summary of the Invention

[0004] The purpose of the present invention is to provide a cutting unit and a cutter head assembly, aiming to solve the technical problem of the prior art shaver causing skin discomfort due to the heat from the blade being transferred to the skin during use.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a cutting unit, including a mounting frame and an outer blade, the mounting frame is provided with a blade cavity running through its upper and lower ends, the outer blade is installed in the blade cavity and exposed to the upper end of the mounting frame, the cutting unit also includes a metal heat dissipation component, the metal heat dissipation component is provided on the mounting frame, and the metal heat dissipation component at least partially surrounds the circumference of the outer blade for contacting with human skin and reducing the thermal sensitivity of human skin.

[0006] A cutting unit includes a mounting frame and an outer blade, the mounting frame is provided with a blade cavity running through its upper and lower ends, the outer blade is installed in the blade cavity and exposed to the upper end of the mounting frame, and is characterized in that the upper end of the mounting frame is located on the peripheral side of the outer blade and is provided with a skin contact surface, and the skin contact surface is a metal surface used to contact human skin and reduce the thermal sensitivity of human skin.

[0007] Beneficial effects of the present invention: The cutting unit of the present invention has a metal heat dissipation component (metal surface) provided on the mounting frame, and the metal heat dissipation component (metal surface) at least partially surrounds the circumference of the outer blade, thereby reducing the area of ​​the skin contacting the mounting frame, and the skin can be in contact with the metal heat dissipation component (metal surface). Due to the high thermal conductivity of the metal heat dissipation component (metal surface), that is, under normal circumstances, the temperature of the metal heat dissipation component (metal surface) is basically the same as the room temperature, and the human body temperature is usually higher than the room temperature, so when the skin contacts the metal heat dissipation component (metal surface), there will be a cool feeling. At the same time, because the metal heat dissipation component (metal surface) is no longer in contact with other electric components that generate heat, when the high temperature generated by the operation of the outer blade causes discomfort to the skin, the metal heat dissipation component (metal surface) can effectively absorb the heat on the skin and dissipate it, thereby cooling the skin and greatly improving the comfort of use.

[0008] Another technical solution adopted by the present invention is: a cutter head assembly, which includes a cutter head shell and at least one cutting unit, each cutting unit includes a mounting frame and an outer blade, each mounting frame is mounted on the cutter head shell, and each mounting frame is provided with a blade cavity running through its upper and lower ends, the outer blade is installed in the corresponding blade cavity and exposed to the upper end of the mounting frame; the cutter head assembly also includes a metal heat dissipation component, the metal heat dissipation component is provided at the upper end of the cutter head shell or the upper end of at least one mounting frame, and the metal heat dissipation component at least partially surrounds the circumference of at least one outer blade for contacting with human skin and reducing the thermal sensitivity of human skin.

[0009] The blade assembly of the present invention, because it utilizes at least one cutting unit as described above, allows the metal heat sink on the cutting unit to contact the skin, resulting in a cool sensation when the skin contacts the metal heat sink. Furthermore, because the metal heat sink is no longer in contact with other heat-generating electrical components, when the high temperatures generated by the operation of the outer blades cause discomfort to the skin, the metal heat sink can effectively absorb and dissipate the heat from the skin, thereby cooling the skin and significantly improving user comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 A schematic structural diagram of a cutting unit provided in an embodiment of the present invention.

[0012] Figure 2 For the Figure 1 Sectional view along line AA.

[0013] Figure 3 A schematic diagram of the structural decomposition of the cutting unit provided in an embodiment of the present invention.

[0014] Figure 4 A schematic structural diagram of a cutter head assembly provided in an embodiment of the present invention.

[0015] Figure 5 A schematic structural diagram of a metal heat dissipation component of a cutting unit provided in an embodiment of the present invention.

[0016] Figure 6 A schematic structural diagram of a mounting bracket for a cutting unit provided in an embodiment of the present invention.

[0017] Figure 7 A schematic structural diagram of another mounting bracket for a cutting unit provided in an embodiment of the present invention.

[0018] Figure 8 This is a thermal image of the cutting unit provided by an embodiment of the present invention during temperature testing.

[0019] Among them, the reference numerals in the figures are:

[0020] 10 - Mounting frame 11 - Blade cavity 12 - Mounting slot

[0021] 13—metal surface 20—outer blade 30—metal heat dissipation component

[0022] 31—Cooling surface 40—Cutter head housing. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. Figures 1 to 8 The described embodiments are exemplary and intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0024] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0026] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0027] Example 1.

[0028] like Figures 1 to 3 As shown, an embodiment of the present invention provides a cutting unit, which can be applied to, for example, a shaving device or a personal care product similar to a shaving device. Moreover, the cutting unit of this embodiment is mainly installed on a cutter head assembly of the shaving device.

[0029] Specifically, the cutting unit includes a mounting frame 10 and an outer blade 20. During the actual installation or assembly process, an inner blade (not shown) may be added to mate with the outer blade 20 as needed. The mounting frame 10 is provided with a blade cavity 11 extending through its upper and lower ends. The blade cavity 11 is provided to accommodate and support the outer blade 20 and also provides space for the outer blade 20 to move. The outer blade 20 is mounted in the blade cavity 11 and exposed at the upper end of the mounting frame 10. The outer blade 20 is generally mounted in the blade cavity 11 with a clearance fit. The portion of the outer blade 20 exposed at the upper end of the mounting frame 10 is designed to contact the human skin to achieve shaving. The cutting unit further includes a metal heat sink 30. The metal heat sink 30 is disposed on the mounting frame 10 and at least partially surrounds the outer blade 20 to contact the human skin and reduce the skin's thermal sensitivity. In other words, the metal heat sink 30 can be disposed around the outer blade 20, either partially or fully surrounding it.

[0030] In the cutting unit of the embodiment of the present invention, a metal heat sink 30 is provided on the mounting frame 10, and the metal heat sink 30 at least partially surrounds the outer blade 20. This reduces the area of ​​skin contact with the mounting frame 10, allowing skin to contact the metal heat sink 30. Due to the high thermal conductivity of the metal heat sink 30, the temperature of the metal heat sink 30 is generally approximately the same as room temperature, while human body temperature is generally higher than room temperature. Therefore, when the skin contacts the metal heat sink 30, it feels cool. Furthermore, because the metal heat sink 30 no longer contacts other heat-generating electrical components, for example, the cutting unit of this embodiment does not require a thermocouple, completely preventing the heat generated by the thermocouple from being transferred to the metal heat sink 30. This ensures that when the outer blade 20 generates high temperatures that could cause discomfort to the skin, the metal heat sink 30 can effectively absorb and dissipate the heat from the skin, thereby cooling the skin and greatly improving user comfort.

[0031] Furthermore, when the cutting unit of this embodiment is applied to a shaving apparatus, it does not need to increase power consumption, thereby ensuring that the shaving apparatus can be used for a longer time within a limited power consumption.

[0032] Preferably, the metal heat sink 30 is made of aluminum, iron, or stainless steel. In other words, the metal heat sink 30 is formed from aluminum, iron, or stainless steel. All of these materials can reduce the thermal sensitivity of human skin when in contact with the skin, absorbing and dissipating heat from the skin, thereby improving user comfort.

[0033] Of course, in other embodiments, the metal heat dissipation component 30 may also be made of other metal materials, such as aluminum alloy, etc., which are not listed here one by one.

[0034] Furthermore, the metal heat dissipation component 30 can be manufactured by die casting, forging, etc. according to actual needs.

[0035] In this embodiment, Figure 3 and Figure 6 As shown, the upper end surface of the mounting frame 10 is provided with a mounting groove 12 on the circumference of the outer blade 20. The mounting groove 12 is located on the circumference of the opening above the blade cavity 11 opened on the mounting frame 10, that is, there is a certain distance between the mounting groove 12 and the opening above the blade cavity 11. The distance can be set according to production requirements. Part of the metal heat dissipation component 30 is embedded in the mounting groove 12. The metal heat dissipation component 30 is embedded in the mounting groove 12 and remains stable. The size of the mounting groove 12 can be adjusted according to actual needs, as long as it ensures that the metal heat dissipation component 30 is stable after being embedded and installed, and is not easy to fall off during use or after long-term use. Specifically, the lower end of the metal heat dissipation component 30 and part of the structure near its lower end are embedded in the mounting groove 12. This ensures that the upper end of the metal heat dissipation component 30 and part of the structure near its upper end are exposed to the upper end of the mounting frame 10. In this way, the metal heat dissipation component 30 has a portion that can effectively contact the skin after installation. At the same time, the embedded method can effectively improve the stability of the metal heat dissipation component 30 after installation.

[0036] Furthermore, the mounting frame 10 can be made of a plastic material, and the metal heat dissipation component 30 can be integrally molded onto the mounting frame 10 during injection molding, so as to be embedded in the mounting groove 12 formed on the mounting frame 10. Alternatively, the mounting frame 10 having the mounting groove 12 can be injection molded first, and the metal heat dissipation component 30 can be embedded in the mounting groove 12 later by interference fit.

[0037] In this embodiment, Figure 2 As shown, the mounting slot 12 has a blind slot structure, and a spacing H is formed between the bottom wall of the mounting slot 12 and the lower end of the mounting frame 10. The depth of the mounting slot 12 is less than the height from the upper end to the lower end of the mounting frame 10. Specifically, the blind slot structure of the mounting slot 12 prevents the mounting slot 12 from penetrating the upper and lower ends of the mounting frame 10. The bottom-sealed mounting slot 12 structure prevents the metal heat sink 30 from coming into contact with other heat-generating electrical components (such as thermocouples), thereby preventing heat from outside the skin from being transferred to the metal heat sink 30, causing the metal heat sink 30 to overheat and be unable to absorb heat from the skin, thereby affecting the cooling effect of the metal heat sink 30 on the skin.

[0038] Furthermore, if Figure 2 and Figures 5-6 As shown, the shape of the mounting groove 12 is compatible with the shape of the metal heat sink 30. Furthermore, the width of the mounting groove 12 (i.e., the distance between the two opposing inner sidewalls within the mounting groove 12) is slightly larger than the width of the metal heat sink 30 (i.e., the distance between the two opposing outer sidewalls outside the metal heat sink 30). This allows the metal heat sink 30 to be embedded in the mounting groove 12, forming an interference fit with the mounting groove 12. This means that the metal heat sink 30 and the mounting groove 12 form a tight fit, greatly improving the stability and reliability of the metal heat sink 30 embedded in the mounting groove 12. The "slightly larger" in the "slightly larger" in width of the mounting groove 12 is based on the premise that the metal heat sink 30 can be embedded in the mounting groove 12 without damaging the structure of the mounting groove 12. The specific larger size is set according to needs. For example, the width of the mounting groove 12 can be greater than or less than 0.1 mm greater than the width of the metal heat sink 30.

[0039] In addition, the shape of the mounting groove 12 is compatible with the shape of the metal heat dissipation component 30, that is, when the overall shape of the metal heat dissipation component 30 is regular, the overall shape of the mounting groove 12 is also regular; when the overall shape of the metal heat dissipation component 30 is irregular, the overall shape of the mounting groove 12 is also irregular, thereby ensuring that the mounting groove 12 can be adapted to the shape of the metal heat dissipation component 30, making it easier for the metal heat dissipation component 30 to be embedded and installed in the mounting groove 12.

[0040] Of course, the width of the mounting groove 12 can be equal to the width of the metal heat sink 30, that is, the difference between the width of the mounting groove 12 and the width of the metal heat sink 30 is zero or negligible. This design also allows the metal heat sink 30 to be stably and reliably embedded in the mounting groove 12. For example, when the mounting frame 10 is injection molded, the metal heat sink 30 is placed in the mold and integrally formed with the mounting frame 10. The metal heat sink 30 is now embedded in the mounting groove 12 formed on the mounting frame 10, and the width of the mounting groove 12 is the same as that of the metal heat sink 30, or the difference is almost zero.

[0041] In this embodiment, Figure 2 and Figure 5As shown, the metal heat sink 30 includes a cooling surface 31 at its upper end. The cooling surface 31 is designed to contact the human skin and is arc-shaped. The arc-shaped cooling surface 31 increases the contact area between the metal heat sink 30 and the skin and reduces the contact area between the upper end surface of the mounting frame 10 and the skin. This improves the heat absorption effect of the metal heat sink 30 on the skin, thereby improving the heat dissipation effect on the skin and further accelerating the heat dissipation efficiency of the skin. On the other hand, the arc-shaped cooling surface 31 can improve the comfort of contact with the skin. In other words, the arc-shaped cooling surface 31 is smoother, which can effectively reduce the feeling of sticking and uneven contact between the skin and the contact surface during shaving, thereby improving the comfort of use.

[0042] Preferably, if Figure 2 and Figure 5 As shown, the cooling surface 31 at the upper end of the metal heat dissipation component 30 is formed by rounding the angles between the two opposite outer side walls of the metal heat dissipation structure and the upper end surface. Furthermore, the transition between the rounded corners and the upper end surface of the metal heat dissipation component 30 is smooth and without sharp corners.

[0043] Furthermore, the metal heat dissipation component 30 can be a solid structure or a hollow structure. For example, the cross-section of the entire structure can be in an “n” shape.

[0044] The cooling surface 31 at the upper end of the metal heat dissipation component 30 can be processed by polishing or other processes to form a smooth surface.

[0045] Among them, Figure 2 As shown, the highest point a of the cooling surface 31 is lower than the highest point b of the outer blade 20, and the highest point a of the cooling surface 31 is spaced as far as possible from the upper end surface of the mounting frame 10. The highest points a and b listed above are all values ​​when the device is placed vertically and at rest. This design allows the cooling surface 31 to be positioned higher relative to the mounting frame 10, ensuring that the cooling surface 31 of the metal heat sink 30 can contact the skin before the upper end surface of the mounting frame 10. Furthermore, the cooling surface 31 of the metal heat sink 30 is lower than the surface of the outer blade 20. Since the outer blade 20 will float to a certain extent during use, it will remain as flush as possible with the cooling surface 31 when floating, allowing the cooling surface 31 of the metal heat sink 30 and the outer blade 20 to contact the skin more closely.

[0046] Furthermore, the metal heat sink 30 is closed around the circumference of the outer blade 20. The outer blade 20 is generally a regular circular or rectangular structure. Therefore, the metal heat sink 30 is closed around the outer circumference of the circular or rectangular outer blade 20, so the cooling surface 31 of the metal heat sink 30 can be designed with the largest area. In other words, the metal heat sink 30 is preferably a closed ring structure, and its shape is similar to the circumference of the outer blade 20.

[0047] Of course, the metal heat dissipation component 30 may also be a non-closed ring structure. The metal heat dissipation component 30 of the non-closed ring structure may be a strip structure, an arc structure or a dot structure with an interval design.

[0048] In addition, the metal heat sink 30 also includes an arc segment that is at least partially circular. The metal heat sink 30 can be formed by connecting a partially circular arc segment with a partially linear segment. The resulting metal heat sink 30 can have either a closed or open structure.

[0049] Of course, the metal heat dissipation component 30 also includes a straight line segment that is at least partially straight.

[0050] Furthermore, if Figure 7 As shown, the upper end of the mounting frame 10 is provided with a skin-contacting surface, located around the outer blade 20, and is a metal surface 13. By providing a metal skin-contacting surface at the upper end of the mounting frame 10, it can also achieve contact with the skin, thereby transferring heat from the skin and dissipating this heat, thereby reducing the skin's thermal sensitivity. Combined with the metal heat dissipation component 30, this can achieve an even better cooling effect.

[0051] The metal surface 13 may be the upper end surface of the entire mounting frame 10 , or may be a local portion of the upper end surface of the mounting frame 10 .

[0052] Specifically, mounting bracket 10 is made of a plastic material, and a metal sheet is injection molded onto the upper end of mounting bracket 10. Metal surface 13 is the upper end surface of the metal sheet. The metal sheet is placed in a mold during the injection molding of mounting bracket 10, thereby being integrally fixed to mounting bracket 10. The metal sheet is exposed on mounting bracket 10, thus forming metal surface 13.

[0053] Of course, the entire mounting frame 10 can be made of metal. In this way, the upper end surface of the mounting frame 10 is a metal surface 13, which can also absorb the heat on the skin through contact with the skin and dissipate it during the contact, effectively reducing the thermal sensitivity on the skin.

[0054] In this embodiment, the mounting frame 10 and the metal sheet can be made of aluminum, iron or stainless steel.

[0055] Preferably, the metal heat sink 30 is built with a semiconductor cooling chip (not shown). The semiconductor cooling chip can be built into the metal heat sink 30 to absorb heat more quickly, further improving the metal heat sink 30's ability to quickly absorb and dissipate heat generated in the skin when in contact with the skin, thereby achieving rapid cooling of the skin.

[0056] See below for test data on the cutting unit of this embodiment:

[0057]

[0058] It can be seen from the above data that the temperature of the metal heat dissipation component 30 is significantly lower than the temperature on the outer blade. Therefore, when the temperature of the outer blade 20 is transferred to the skin, the metal heat dissipation component 30 can effectively absorb the temperature on the skin, thereby reducing the skin's thermal sensitivity.

[0059] See also the attached Figure 8 , which is a thermal image of the cutting unit, in which the color of the metal heat dissipation component 30 is obviously lighter, indicating a lower temperature, and HS indicates the temperature hot spot 1 of the outer blade 20, M1 indicates the temperature between the outer blade 20 and the metal heat dissipation component 30, and CS indicates the temperature cold spot 1 of the outside world (non-cutting unit).

[0060] Example 2.

[0061] The present embodiment provides a cutter head assembly, which includes a cutter head housing 40 and at least one cutting unit as described above. Each cutting unit is mounted on the cutter head housing 40. That is, according to actual needs, multiple cutting units can be designed, for example, two cutting units are arranged side by side, or three cutting units are arranged in a ring (see Figure 4 ).

[0062] The cutter head assembly of this embodiment is mainly used in personal care products such as shaving devices or similar shaving devices. During assembly, the cutter head assembly is connected to the handle assembly of the personal care product.

[0063] Since the blade assembly of this embodiment utilizes at least one cutting unit as described above, the metal heat sink 30 on the cutting unit contacts the skin, providing a cool sensation when the skin comes into contact with the metal heat sink 30. Furthermore, since the metal heat sink 30 is no longer in contact with other heat-generating electrical components, when the outer blade 20 generates high temperatures that could cause discomfort to the skin, the metal heat sink 30 can effectively absorb and dissipate the heat from the skin, thereby cooling the skin and significantly improving user comfort.

[0064] The rest of this embodiment is the same as that of the first embodiment. The features not explained in this embodiment are all based on the explanations of the first embodiment and will not be described in detail here.

[0065] Example 3.

[0066] A cutter head assembly is provided in this embodiment, which includes a cutter head housing 40 and at least one cutting unit. Each cutting unit includes a mounting frame 10 and an outer blade 20. Each mounting frame 10 is mounted on the cutter head housing 40, and each mounting frame 10 is provided with a blade cavity 11 passing through its upper and lower ends. The outer blade 20 is installed in the corresponding blade cavity 11 and exposed to the upper end of the mounting frame 10.

[0067] Among them, the main difference between the cutter head assembly of this embodiment and the cutter head assembly of Example 2 is that the cutter head assembly also includes a metal heat dissipation component 30, which is arranged at the upper end of the cutter head shell 40 or the upper end of at least one mounting frame 10, and the metal heat dissipation component 30 at least partially surrounds the circumference of at least one outer blade 20 for contacting with human skin and reducing the thermal sensitivity of human skin.

[0068] The blade assembly of this embodiment is in contact with the skin through the metal heat sink 30, which provides a cool sensation when the skin touches the metal heat sink 30. Furthermore, since the metal heat sink 30 is no longer in contact with other heat-generating electrical components, when the high temperature generated by the operation of the outer blade 20 causes discomfort to the skin, the metal heat sink 30 can effectively absorb the heat from the skin and dissipate it, thereby cooling the skin and greatly improving the user's comfort.

[0069] The rest of this embodiment is the same as that of the first embodiment. The features not explained in this embodiment are all based on the explanations of the first embodiment and will not be described in detail here.

[0070] Example 4.

[0071] The present embodiment provides a cutter head assembly, which includes a cutter head housing 40 and a cutting unit. The cutting unit includes a mounting frame 10 and at least one outer blade 20. The mounting frame 10 is installed on the cutter head housing 40, and the mounting frame 10 is provided with blade cavities 11, the number of which is the same as the number of outer blades 20 and which pass through the upper and lower ends thereof. Each outer blade 20 is respectively installed in each blade cavity 11 and exposed to the upper end of the mounting frame 10.

[0072] Among them, the main difference between the cutter head assembly of this embodiment and the cutter head assembly of embodiment 2 is that the cutting unit also includes a metal heat dissipation component 30, which is arranged at the upper end of the cutter head shell 40 or the upper end of the mounting frame 10, and the metal heat dissipation component 30 at least partially surrounds the circumference of at least one outer blade 20 for contacting with human skin and reducing the thermal sensitivity of human skin.

[0073] The blade assembly of this embodiment is in contact with the skin through the metal heat sink 30, which provides a cool sensation when the skin touches the metal heat sink 30. Furthermore, since the metal heat sink 30 is no longer in contact with other heat-generating electrical components, when the high temperature generated by the operation of the outer blade 20 causes discomfort to the skin, the metal heat sink 30 can effectively absorb the heat from the skin and dissipate it, thereby cooling the skin and greatly improving the user's comfort.

[0074] The rest of this embodiment is the same as that of the first embodiment. The features not explained in this embodiment are all based on the explanations of the first embodiment and will not be described in detail here.

[0075] Example 5.

[0076] This embodiment provides a shaving device, which includes a handle assembly and the above-mentioned cutter head assembly, wherein the cutter head assembly is mounted on the handle assembly. The cutter head assembly can adopt the cutter head assembly of the above-mentioned embodiment 2, embodiment 3 or embodiment 4.

[0077] The shaving device of the present invention, since it uses the above-mentioned cutter head assembly, can make the metal heat dissipation component 30 on the cutting unit contact the skin when the shaving device is in use, so that the skin will feel cool when it contacts the metal heat dissipation component 30. In addition, the metal heat dissipation component 30 can also effectively absorb heat from the skin and dissipate it, thereby cooling the skin and greatly improving the comfort of use.

[0078] The rest of this embodiment is the same as that of Example 1, Example 2, Example 3 or Example 4. The features not explained in this embodiment are all based on the explanations of Example 1, Example 2, Example 3 or Example 4 and will not be repeated here.

[0079] Example 6.

[0080] This embodiment provides a cutting unit, see Figure 7 Combined with Figure 1As shown, the cutting unit includes a mounting frame 10 and an outer blade 20. The mounting frame 10 is provided with a blade cavity 11 extending through its upper and lower ends. The outer blade 20 is mounted in the blade cavity 11 and exposed at the upper end of the mounting frame 10. The upper end of the mounting frame 10 is provided with a skin contact surface located on the side of the outer blade 20. The skin contact surface is a metal surface 13 for contacting human skin and reducing the thermal sensitivity of the human skin. By providing a metal skin contact surface at the upper end of the mounting frame 10, it can achieve contact with the skin and transfer heat from the skin, thereby dissipating the heat, reducing the thermal sensitivity of the skin, and achieving a good cooling effect.

[0081] The metal surface 13 may be the upper end surface of the entire mounting frame 10 , or may be a local portion of the upper end surface of the mounting frame 10 .

[0082] Specifically, mounting bracket 10 is made of a plastic material, and a metal sheet is injection molded onto the upper end of mounting bracket 10. Metal surface 13 is the upper end surface of the metal sheet. The metal sheet is placed in a mold during the injection molding of mounting bracket 10, thereby being integrally fixed to mounting bracket 10. The metal sheet is exposed on mounting bracket 10, thus forming metal surface 13.

[0083] Of course, the entire mounting frame 10 can be made of metal. In this way, the upper end surface of the mounting frame 10 is a metal surface 13, which can also absorb the heat on the skin through contact with the skin and dissipate it during the contact, effectively reducing the thermal sensitivity on the skin.

[0084] In this embodiment, the mounting frame 10 and the metal sheet can be made of aluminum, iron or stainless steel.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cutting unit comprising a mounting frame and an outer blade, wherein the mounting frame is provided with a blade cavity extending through the upper and lower ends thereof, the outer blade being mounted in the blade cavity and exposed to the upper end of the mounting frame, characterized in that: The cutting unit further includes a metal heat dissipation component, which is provided on the mounting frame and at least partially surrounds the circumference of the outer blade so as to be in contact with human skin and reduce the thermal sensitivity of human skin; The upper end surface of the mounting frame is provided with a mounting groove on the peripheral side of the outer blade, and a portion of the metal heat dissipation component is embedded in the mounting groove; The bottom of the mounting groove is blocked, and a gap exists between the bottom wall of the mounting groove and the lower end of the mounting bracket; The metal heat dissipation component includes a cooling surface located at an upper end thereof, and the cooling surface is in an arc shape.

2. The cutting unit according to claim 1, characterized in that: The highest point of the cooling surface is lower than the highest point of the outer blade, and a distance exists between the highest point of the cooling surface and the upper end surface of the mounting frame.

3. The cutting unit according to claim 1 or 2, characterized in that: The metal heat dissipation component includes an arc segment that is at least partially in an arc shape.

4. The cutting unit according to claim 1 or 2, characterized in that: The upper end of the mounting frame is located on the peripheral side of the outer blade and is provided with a skin contact surface, which is a metal surface.

5. The cutting unit according to claim 1 or 2, characterized in that: The metal heat dissipation component is equipped with a semiconductor refrigeration sheet.

6. A cutting unit comprising a mounting frame and an outer blade, wherein the mounting frame is provided with a blade cavity extending through the upper and lower ends thereof, the outer blade being mounted in the blade cavity and exposed to the upper end of the mounting frame, characterized in that: The upper end of the mounting frame is provided with a skin contact surface on the peripheral side of the outer blade, and the skin contact surface is a metal surface of a metal heat dissipation component, and the metal surface is used to contact with human skin and reduce the thermal sensitivity of human skin; The upper end surface of the mounting frame is provided with a mounting groove on the peripheral side of the outer blade, and a portion of the metal heat dissipation component is embedded in the mounting groove; The bottom of the installation groove is blocked, and a gap exists between the bottom wall of the installation groove and the lower end of the installation frame.

7. The cutting unit according to claim 6, characterized in that: The mounting frame is made of metal material, and the metal surface is the upper end surface of the mounting frame.

8. A cutter head assembly, characterized in that: The cutting unit comprises a cutter head housing and at least one cutting unit, each of the cutting units comprising a mounting frame and at least one outer blade, each of the mounting frames being mounted on the cutter head housing, and the mounting frame being provided with blade cavities having the same number as the number of the outer blades and extending through the upper and lower ends thereof, the outer blades being mounted in the corresponding blade cavities and exposed to the upper end of the mounting frame; The cutter head assembly further includes a metal heat dissipation component, which is provided at an upper end of the cutter head housing or an upper end of at least one of the mounting brackets, and the metal heat dissipation component at least partially surrounds a circumference of at least one of the outer blades for contacting human skin and reducing the thermal sensitivity of human skin; The upper end surface of the mounting frame is provided with a mounting groove on the peripheral side of the outer blade, and a portion of the metal heat dissipation component is embedded in the mounting groove; The bottom of the installation groove is blocked, and a gap exists between the bottom wall of the installation groove and the lower end of the installation frame.

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