Patent Description:
The existing electric shaver startup method generally includes a key switch and a toggle switch. The long-term use of the key switch and the toggle switch will cause the metal shrapnel of the internal components of the switch to fatigue and lose elasticity, and the switch will fail, thereby failing to maintain the reliability of the power supply.

An object of embodiments of the present invention is to provide a shaving head assembly, a handle assembly, and an inductive shaver, to solve the technical problem that long-term use of the key switch and the toggle switch of the existing electric shaver will affect the reliability.

An electric shaver is disclosed in Document <CIT>.

A cutter head connection structure, a cutter head, a handle and a shaver is disclosed in Document <CIT>.

The scope of the present invention is defined by the claims.

An embodiment of the present invention provides a shaving head assembly, which includes: a head cover; a holder, mounted on the head cover; a cutting unit, mounted on the holder, and the cutting unit comprising cutters mounted on the holder and a rotating cutter head arranged in cutters; and a connecting seat, configured for connecting to a handle assembly, and the connecting seat being electrically connected with the holder;
the holder is served as a first end of a first conductive path, and the first conductive path is configured for receiving a first inductive capacitor between the holder and the ground when the holder approaches or contacts human skin; or wherein the cutters are served as a first end of a first conductive path, and the first conductive path is configured for receiving a first inductive capacitor between the cutters and the ground when the cutters approach or contact human skin;wherein the shaving head assembly further comprises a gear frame aligned with the head cover, a cover plate mounted on one end of the gear frame, and a snap-fit member mounted on the cover plate and engaged with the head cover, the head cover is electrically connected with the snap-fit member and serves as a part of the first conductive path; wherein the shaving head assembly further comprises a floating pressing plate arranged in the gear frame, and a floating elastic member with two ends respectively abutting against the connecting seat and the floating pressing plate, the snap-fit member and the floating pressing plate are electrically connected through a first conductor, and the floating pressing plate, the floating elastic member, and the connecting seat are electrically connected in sequence and serve as a part of the first conductive path.

Optionally, when the holder is served as the first end of the first conductive path, the holder is configured as a conductor; or an outer surface of the holder is provided with a conductive layer; and
when the cutters are served as the first end of the first conductive path, the cutters are configured as conductors; or an outer surface of the cutters is provided with a conductive layer.

Optionally, the holder is provided with a mounting groove, the cutting unit is arranged in the mounting groove, the holder is mounted with a fixing plate configured for limiting the cutting unit, and the holder is electrically connected to the head cover and serves as a part of the first conductive path.

Optionally, the head cover is provided with a mounting hole, and the holder is swingably arranged in the mounting hole.

Optionally, a middle part of the cover plate is provided a positioning post, the snap-fit member is provided with a positioning hole configured for the positioning post passing through; the snap-fit member is provided with a plurality of positioning buckles circumferentially distributed, and the cover plate is provided with insertion holes configured for the positioning buckles to be inserted.

Optionally, the floating pressing plate is provided with a connecting post, the first conductor is elastic members, one end of the first conductor is sleeved on the connecting post, and the other end of the first conductor is abutted on the snap-fit member.

Optionally, the connecting seat is provided with a mounting cavity, an inner wall of the connecting seat is provided with a first positioning boss, and the floating pressing plate is provided with a second positioning boss, two ends of the floating elastic member are respectively sleeved on the first positioning boss and the second positioning boss.

An embodiment of the present invention provides a handle assembly configured for connecting the shaving head assembly above-mentioned, and the handle assembly includes: a casing; a motor, mounted in the casing and configured for powering the rotating cutter head; and a circuit board assembly, mounted in the casing; the circuit board assembly is electrically connected to a second end of the first conductive path and configured for activating the motor when receiving the first inductive capacitor.

Optionally, the circuit board assembly is provided with a first receiving end electrically connected to the second end of the first conductive path to receive the first inductive capacitor, the circuit board assembly is provided with a first capacitor electrically connected to the first receiving end and configured for determining a reference capacitor, the circuit board assembly comprises a controller configured for activating the motor when the first receiving end obtains the first inductive capacitor.

Optionally, the handle assembly further includes an upper cover mounted at an end port of the casing, the upper cover is provided with an insertion slot configured for the connecting seat to be inserted into, the connecting seat is detachably mounted on the upper cover, and the connecting seat is electrically connected to the upper cover and serves as a part of the first conductive path.

Optionally, a side wall of the insertion slot is provided with a through hole, and the handle assembly further comprises a latch fastener penetrated through the through hole and elastic members configured for pushing the latch fastener, the connecting seat is further provided with a latching position for the latch fastener to be engaged into, and the upper cover, the latch fastener, and the elastic member are electrically connected in sequence and serve as a part of the first conductive path.

Optionally, the handle assembly further includes an inner shell mounted in the casing, a second conductor mounted on the inner shell, and a third conductor mounted on the inner shell and electrically connected to the second conductor, the circuit board assembly is mounted on the inner shell, the second conductor is abutted on one of the elastic members, and the third conductor is electrically connected to the first receiving end.

Optionally, the second conductor is arranged on an upper end of the inner shell; the third conductor is strip-shaped and arranged on an outer surface of the inner shell; the second conductor and the third conductor are electrically connected by screws passing through the inner shell.

Optionally, the handle assembly further includes a wake-up sensor for switching the motor to a standby state.

Optionally, the casing is a conductive casing; the circuit board assembly is provided with a second receiving end configured for receiving a second inductive capacitor between the casing and the ground when the casing approaches or contacts human skin, the circuit board assembly is provided with a second capacitor electrically connected to the second receiving end and configured for determining a reference capacitor; and the controller is further configured for controlling the motor being in a standby state when the second receiving end obtains the second inductive capacitor; and
the wake-up sensor comprises a second conductive path, the casing serves as a first end of the second conductive path, and a second end of the second conductive path is electrically connected to the second receiving end.

Optionally, the handle assembly further includes an inner shell mounted in the casing and a fourth conductor mounted on the inner shell, one end of the fourth conductor is abutted on the casing, and the other end is electrically connected to the second receiving end.

Optionally, the circuit board assembly further includes a touch signal processor, the first receiving end and the second receiving end are both arranged on the touch signal processor, and the controller is electrically connected to the touch signal processor.

An embodiment of the present invention provides an inductive shaver, which includes the shaving head assembly above-mentioned and the handle assembly above-mentioned, and the shaving head assembly is connected to the handle assembly.

The above-mentioned one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:
In the shaving head assembly, the connecting base is electrically connected with the holder, and when the connecting base is connected to the handle assembly, the holder or the cutters serves as the first end of the first conductive path. When shaving, the holder or the cutters are arranged approaching the human skin such as the chin and cheeks; because the human skin has a certain electric charge, when the human skin directly contacts or approaches the holder or cutters, the holder or cutters will absorb human skin capacitance formed between the approaching position and the ground, which is the first inductive capacitor, and the signal of the first inductive capacitor is served as the signal to activate the motor.

In the handle assembly, the second end of the first conductive path is connected to the circuit board assembly, and when the circuit board assembly receives the first inductive capacitor, the motor is activated to drive the rotating cutter head in the cutting unit to rotate.

The inductive shaver includes the above-mentioned shaving head assembly and the above-mentioned handle assembly. The shaver is configured with the first conductive path, the first end of the first conductive path is the holder or the cutters in the shaving head assembly, and the second end is connected to the circuit board assembly in the handle assembly. When shaving, the holder or the cutters are arranged approaching the human skin such as the chin and cheeks; because the human skin has a certain electric charge, when the human skin directly contacts or approaches the holder or cutters, the holder or cutters will absorb human skin capacitance formed between the approaching position and the ground, which is the first inductive capacitor. When the circuit board assembly receives the first inductive capacitor, the motor is activated to drive the rotating cutter head in the cutting unit to rotate, so as to achieve the purpose of inductive shaving and ensure long-term reliable use of the shaver.

In order to explain the embodiments of the present invention more clearly, a brief introduction regarding the accompanying drawings that need to be used for describing the embodiments of the present invention or the prior art is given below; it is obvious that the accompanying drawings described as follows are only some embodiments of the present invention, for those skilled in the art, other drawings can also be obtained according to the current drawings on the premise of paying no creative labor.

In order to make the purpose, the technical solution and the advantages of the present invention be clearer and more understandable, the present invention will be further described in detail below with reference to accompanying figures and embodiments. It should be understood that the specific embodiments described herein are merely intended to illustrate but not to limit the present invention.

In the description of the embodiments of the present invention, it needs to be understood that, directions or location relationships indicated by terms such as "length", "width", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and so on are the directions or location relationships shown in the accompanying figures, which are only intended to describe the present invention conveniently and simplify the description, but not to indicate or imply that an indicated device or component must have specific locations or be constructed and manipulated according to specific locations; therefore, these terms shouldn't be considered as any limitation to the present invention.

In addition, terms "the first" and "the second" are only used in describe purposes, and should not be considered as indicating or implying any relative importance, or impliedly indicating the number of indicated technical features. As such, technical feature(s) restricted by "the first" or "the second" can explicitly or impliedly comprise one or more such technical feature(s). In the description of the present invention, "a plurality of" means two or more, unless there is additional explicit and specific limitation.

In the present invention, unless there is additional explicit stipulation and limitation, terms such as "mount", "connect with each other", "connect", "fix", and so on should be generalizedly interpreted, for example, "connect" can be interpreted as being fixedly connected, detachably connected, or connected integrally; "connect" can also be interpreted as being mechanically connected or electrically connected; "connect" can be further interpreted as being directly connected or indirectly connected through intermediary, or being internal communication between two components or an interaction relationship between the two components. For the one of ordinary skill in the art, the specific meanings of the aforementioned terms in the present invention can be interpreted according to specific conditions.

Referring to <FIG> and <FIG>, an embodiment of the present invention provides an inductive shaver, including a shaving head assembly <NUM> and a handle assembly <NUM>, and the shaving head assembly <NUM> is mounted on the handle assembly <NUM>. The shaving head assembly <NUM> includes a head cover <NUM>, a holder <NUM> mounted on the head cover <NUM>, a cutting unit <NUM> mounted on the holder <NUM>, and a connecting seat <NUM> for connecting with the handle assembly <NUM>. The connecting seat <NUM> is electrically connected with the holder <NUM>. The cutting unit <NUM> includes cutters <NUM> mounted on the holder <NUM> and a rotating cutter head <NUM> arranged in the cutters <NUM> and used for cutting. The cutters <NUM> are in contact with the holder <NUM> so that the two are electrically connected. The holder <NUM> or the cutters <NUM> is served as the first end of the first conductive path <NUM>, and the first conductive path <NUM> is used to receive a first inductive capacitor Cf1 between holder <NUM> (or the cutters <NUM>) and the ground (GND) when the holder <NUM> (or the cutters <NUM>) approaches of contacts the human skin <NUM>. The handle assembly <NUM> includes a casing <NUM>, a motor <NUM> mounted in the casing <NUM> and used to provide power to the rotating cutter head <NUM>, and a circuit board assembly <NUM> mounted in the casing <NUM>. The circuit board assembly <NUM> is electrically connected to the second end of the first conductive path <NUM> and is used to activate the motor <NUM> when receiving the first inductive capacitor Cf1.

Compared with the prior art, the inductive shaver provided by the present invention, referring to <FIG>, <FIG> and <FIG>, the inductive shaver includes the shaving head assembly <NUM> and the handle assembly <NUM>. The shaver is configured with the first conductive path <NUM>, the first end of the first conductive path <NUM> is the holder <NUM> or the cutters <NUM> in the shaving head assembly <NUM>, and the second end is connected to the circuit board assembly <NUM> in the handle assembly <NUM>. When shaving, the holder <NUM> (or the cutters <NUM>) is arranged approaching the human skin <NUM> such as the chin and cheeks; because the human skin <NUM> has a certain electric charge, when the human skin <NUM> directly contacts or approaches the holder <NUM> (or the cutters <NUM>), the holder <NUM> (or the cutters <NUM>) will absorb human skin capacitance formed between the approaching position and the ground, which is the first inductive capacitor Cf1. When the circuit board assembly <NUM> receives the first inductive capacitor Cf1, the motor <NUM> is activated to drive the rotating cutter head <NUM> in the cutting unit <NUM> to rotate, so as to achieve the purpose of inductive shaving and ensure long-term reliable use of the shaver.

Specifically, when no human skin <NUM> approaches the holder <NUM> (or cutters <NUM>), there is no first inductive capacitor Cf1 between the human skin <NUM> and the ground; when the human skin <NUM> approaches the holder <NUM> (or the cutters <NUM>), a first inductive capacitor Cf1 is formed between the holder <NUM> (or the cutters <NUM>) and the ground. Before and after the human skin <NUM> approaches the holder <NUM> (or the cutters <NUM>), the circuit board assembly <NUM> receives the change signal of the first inductive capacitor Cf1, and at this time, the motor <NUM> is activated.

Referring to <FIG> and <FIG>, an embodiment of the present invention provides a shaving head assembly <NUM>, which includes a head cover <NUM>, a holder <NUM> mounted on the head cover <NUM>, a cutting unit <NUM> mounted on the holder <NUM>, and a connecting seat <NUM> configured for connecting the handle assembly <NUM>. The connecting seat <NUM> is electrically connected with the holder <NUM>, the holder <NUM> (or the cutters <NUM>) is served as the first end of the first conductive path <NUM>, and the first conductive path <NUM> is used to receive the first inductive capacitor Cf1 between the holder <NUM> (or the cutters <NUM>) and the ground (GND) when the holder <NUM> (or the cutters <NUM>) approaches or contacts the human skin <NUM>.

In the shaving head assembly <NUM>, the connecting seat <NUM> is electrically connected with the holder <NUM>. When the connecting seat <NUM> is connected to the handle assembly <NUM>, the holder <NUM> (or the cutters <NUM>) serves as the first end of the first conductive path <NUM>. When shaving, the holder <NUM> (or the cutters <NUM>) is arranged approaching the human skin <NUM> such as the chin and cheeks; because the human skin <NUM> has a certain electric charge, when the human skin <NUM> directly contacts or approaches the holder <NUM> (or the cutters <NUM>), the holder <NUM> (or the cutters <NUM>) will absorb human skin capacitance formed between the approaching position and the ground, which is the first inductive capacitor Cf1, and the signal of the first inductive capacitor Cf1 is served as the signal to activate the motor <NUM>.

In another embodiment of the present invention, when the holder <NUM> or the cutters <NUM> is (are) served as the first end of the first conductive path <NUM>, the holder <NUM> is a conductor. It is easy to process the holder <NUM> by directly using the conductive material. Alternatively, the outer surface of the holder <NUM> is provided with a conductive layer. By arranging the holder <NUM> formed by the conductive layer on the outer surface of the plastic member, the weight will be lighter. Similarly, when the cutters <NUM> are served as the first end of the first conductive path <NUM>, the cutters <NUM> are conductors. Alternatively, the outer surfaces of the cutters <NUM> are provided with a conductive layer. Both fabrication methods can be served as the first end of the first conductive path <NUM>, and the holder <NUM> (or the cutters <NUM>) will absorb the human skin capacitance formed between it and the ground from a position approaching the human skin <NUM>.

Referring to <FIG>, <FIG>, in another embodiment of the present invention, the holder <NUM> is provided with a mounting groove <NUM>, the cutting unit <NUM> is penetrated through the mounting groove <NUM> and arranged in the mounting groove <NUM>, and the holder <NUM> is mounted with a fixing plate <NUM> for limiting the cutting unit <NUM>. With the structure of the cutting unit <NUM>, the holder <NUM> and the fixing plate <NUM>, the assembly is simple. Specifically, the cutting unit <NUM> is inserted into the mounting groove <NUM> of the holder <NUM> from bottom to top, and is limited by the bottom edge of the cutting unit <NUM> to fix the fixing plate <NUM> on the inner wall of the holder <NUM>. The holder <NUM> and the head cover <NUM> are abutted against each other so that the both are electrically connected and serve as a part of the first conductive path <NUM>.

In another embodiment of the present invention, the head cover <NUM> is provided with a mounting hole <NUM>, and the holder <NUM> is swingably disposed in the mounting hole <NUM>. The holder <NUM> is swingably arranged on the head cover <NUM>, so that the angle of the holder <NUM> can be automatically adjusted to fit the human skin <NUM> during shaving, which provides comfort and better shaving experience. Specifically, the holder <NUM> is assembled on the head cover <NUM> by swinging a positioning shaft <NUM> on the head cover <NUM>, and the positioning shaft <NUM> is inserted into the connecting hole <NUM> of the holder <NUM> to realize the movable mounting of the holder <NUM> on the head cover <NUM>.

Referring to <FIG> and <FIG>, in another embodiment of the present invention, the holders <NUM> are provided with three, the three holders <NUM> are distributed in a circumferential direction, and the three holders <NUM> are distributed in a triangle relative to the swing axis of the head cover <NUM>. In this way, the relative area with the human skin <NUM> can be increased, and when the user brings the holder <NUM> (or the cutters <NUM>) approaching the human skin <NUM>, the holder <NUM> (or the cutters <NUM>) can more easily absorb the human skin capacitance formed between the approaching position to the human skin <NUM> and the ground, and then transmitted to the circuit board assembly <NUM>.

Referring to <FIG>, <FIG>, and <FIG>, in another embodiment of the present invention, a gear transmission mechanism is provided between the motor <NUM> and the shaving head assembly <NUM>, and the gear transmission mechanism includes a driving gear <NUM> and a driven gear <NUM> meshed with the driving gear <NUM>, and the driven gear <NUM> is connected with a connecting shaft <NUM>. The shaving head assembly <NUM> further includes a gear frame <NUM> aligned with the head cover <NUM>, a cover plate <NUM> mounted on one end of the gear frame <NUM>, and a snap-fit member <NUM> mounted on the cover plate <NUM> and engaged with the head cover <NUM>, the snap-fit member <NUM> is configured to connect the head cover <NUM> and the cover plate <NUM>. When the shaving head assembly <NUM> is mounted on the handle assembly <NUM>, the motor <NUM> of the handle assembly <NUM> drives the driving gear <NUM> to rotate. The driven gear <NUM> is rotatably disposed on the gear frame <NUM>, and the connecting shaft <NUM> of the driven gear <NUM> passes through the cover plate <NUM> and is connected to the rotating cutter head <NUM> of the cutting unit <NUM> to drive the rotating cutter head <NUM> to rotate. The head cover <NUM> abuts against the snap-fit member <NUM> for electrical connection and serves as a part of the first conductive path <NUM>.

Referring to <FIG> and <FIG>, in another embodiment of the present invention, the middle part of the cover plate <NUM> is provided with a positioning post <NUM>, and the snap-fit member <NUM> is provided with a positioning hole <NUM> through which the positioning post <NUM> passes. The snap-fit member <NUM> is provided with several positioning buckles <NUM> circumferentially distributed, and the cover plate <NUM> is provided with insertion holes <NUM> for the positioning buckles <NUM> to insert. The positioning hole <NUM> is aligned with the positioning post <NUM> at the bottom of the cover plate <NUM> and then sleeved on the positioning post <NUM>, then the positioning hole <NUM> is inserted into the insertion hole <NUM>, and then the snap-fit member <NUM> can be assembled on the cover plate <NUM>, the connection is reliable and stable.

In another embodiment of the present invention, the shaving head assembly <NUM> further includes a floating pressing plate <NUM> disposed in the gear frame <NUM>, and a floating elastic member <NUM> with two ends respectively abutting on the connecting seat <NUM> and the floating pressing plate <NUM>. The configuration of the connecting seat <NUM>, the floating pressing plate <NUM> and the floating elastic member <NUM> can make the cutting unit <NUM> move in the axial direction, thereby improving the shaving experience of the user. The snap-fit member <NUM> and the floating pressing plate <NUM> are electrically connected through the first conductor <NUM>. The floating pressing plate <NUM>, the floating elastic member <NUM>, and the connecting seat <NUM> are electrically connected in sequence and serve as a part of the first conductive path <NUM>. The snap-fit member <NUM>, the first conductor <NUM>, the floating pressing plate <NUM>, the floating elastic member <NUM>, and the connecting seat <NUM> are electrically connected in sequence, and the human skin capacitance between the holder <NUM> (or the cutters <NUM>) and the ground is transmitted to the circuit board assembly <NUM> in the handle assembly <NUM>. Specifically, the outer edge of the floating pressing plate <NUM> is provided with a limiting structure <NUM>, the floating pressing plates <NUM> are fixed together by the positioning grooves <NUM> on the gear frame <NUM>, and the limiting structure <NUM> can be engaged in the positioning groove <NUM>. A trim ring pressing plate <NUM> is assembled on the gear frame <NUM> by the positioning fit of the connecting seat <NUM>, and then being assembled together with floating elastic member <NUM> and the floating pressing plate <NUM> by the connecting seat <NUM>.

In another embodiment of the present invention, the floating pressing plate <NUM> is provided with a connecting post <NUM>, the first conductor <NUM> is elastic members, one end of the first conductor <NUM> is sleeved on the connecting post <NUM>, and the other end of the first conductor <NUM> is abutted on the connecting post <NUM>. By using the elastic first conductor <NUM>, the reliable electrical connection between the floating pressing plate <NUM> and the snap-fit member <NUM> can be ensured. The first conductor <NUM> is positioned and assembled on the floating pressing plate <NUM> by using the connecting post <NUM>, so that the connection between the first conductor <NUM> and the floating pressing plate <NUM> is reliable.

Referring to <FIG> and <FIG>, in another embodiment of the present invention, the connecting seat <NUM> is provided with a mounting cavity <NUM>, the inner wall of the connecting seat <NUM> is provided with a first positioning boss <NUM>, and the floating pressing plate <NUM> is provided with a second positioning boss <NUM>, two ends of the floating elastic member <NUM> are respectively sleeved on the first positioning boss <NUM> and the second positioning boss <NUM>. This assembly method ensures that the two ends of the floating elastic member <NUM> reliably abut on the connecting seat <NUM> and the floating pressing plate <NUM> to ensure reliable electrical connection.

Referring to <FIG> and <FIG>, in another embodiment of the present invention, a plurality of buckles <NUM> are provided on the head cover <NUM>, and the buckles <NUM> of the head cover <NUM> are aligned with the insertion holes <NUM> on the cover plate <NUM>, and the buckles <NUM> are tightly combined with the positioning buckles <NUM> of the snap-fit member <NUM> to achieve a detachable fit between the head cover <NUM> and the cover plate <NUM>.

Referring to <FIG> and <FIG>, an embodiment of the present invention provides a handle assembly <NUM>, and the handle assembly <NUM> is configured to connect the above-mentioned shaving head assembly <NUM>. The handle assembly <NUM> includes a casing <NUM>, a motor <NUM> mounted in the casing <NUM> and used to power the cutting unit <NUM>, and a circuit board assembly <NUM> mounted in the casing <NUM>. The circuit board assembly <NUM> is electrically connected to the second end of the first conductive path <NUM>, and is configured for activating the motor <NUM> when receiving the first inductive capacitor Cf1.

In the handle assembly <NUM>, the circuit board assembly <NUM> is electrically connected to the second end of the first conductive path <NUM>. When the circuit board assembly <NUM> receives the first inductive capacitor Cf1, the motor <NUM> is activated to drive the rotating cutter head <NUM> in the cutting unit <NUM> to rotate.

Referring to <FIG> at the same time, in another embodiment of the present invention, the circuit board assembly <NUM> is provided with a first receiving end 211a that is electrically connected to the second end of the first conductive path <NUM> to receive the first inductive capacitor Cf1, and the circuit board assembly <NUM> is provided with a first capacitor <NUM> electrically connected to the first receiving end 211a and used for determining the reference capacitor Cp1, the circuit board assembly <NUM> includes a controller <NUM> for activating the motor <NUM> when the first receiving end 211a obtains the first inductive capacitor Cf1. The first inductive capacitor Cf1 and the reference capacitor Cp1 are connected in parallel to the first receiving end 211a. When there is no human skin <NUM> approaching the holder <NUM> (or cutters <NUM>), there is no the first inductive capacitor Cf1 formed between the human skin <NUM> and the ground, only the reference capacitor Cp1 on the circuit board assembly <NUM>; when there is human skin <NUM> approaching the holder <NUM> (or cutters <NUM>), the first inductive capacitor Cf1 is formed between the holder <NUM> (or cutters <NUM>) and the ground. Since Cf1 and Cp1 are connected in parallel, before and after the human skin <NUM> approaches the holder <NUM> (or the cutters <NUM>), the total capacitor produces a capacitance change after entering the first receiving end <NUM> a. That is, when the first receiving end 211a obtains the change signal of the first inductive capacitor Cf1, the controller <NUM> activates the motor <NUM> to drive the rotating cutter head <NUM> in the cutting unit <NUM> to rotate.

Referring to <FIG>, <FIG> and <FIG>, in another embodiment of the present invention, the handle assembly <NUM> further includes an upper cover <NUM> mounted at an end port of the casing <NUM>, and the upper cover <NUM> has an insertion slot <NUM> for the connecting seat <NUM> to be inserted, the connecting seat <NUM> is detachably mounted on the upper cover <NUM>, and the connecting seat <NUM> is electrically connected with the upper cover <NUM> as a part of the first conductive path <NUM>. The structure in which the connecting seat <NUM> is detachably mounted on the upper cover <NUM> is adopted, so that the shaving head assembly <NUM> can be easily disassembled for cleaning.

Referring to <FIG> and <FIG>, in another embodiment of the present invention, a side wall of the insertion slot <NUM> is provided with a through hole <NUM>, and the handle assembly <NUM> further includes a latch fastener <NUM> penetrated through the through hole <NUM> and elastic members <NUM> configured for pushing the latch fastener <NUM>, referring to <FIG> together, the connecting seat <NUM> is provided with a latching position <NUM> for the latch fastener <NUM> to be engaged into. When inserting the connecting seat <NUM> into the insertion slot <NUM> of the upper cover <NUM>, and under the action of the elastic member <NUM>, the latch fastener <NUM> is engaged into the latching position <NUM> of the connecting seat <NUM> to lock the connecting seat <NUM> on the upper cover <NUM>. Disassembly is accomplished by pulling out the handle assembly <NUM>. The assembly and disassembly are very convenient. When the connecting seat <NUM> is mounted on the upper cover <NUM>, the connecting seat <NUM> is abutted on the upper cover <NUM> to be electrically connected, and the upper cover <NUM>, the latch fastener <NUM>, and the elastic member <NUM> are electrically connected in sequence and serve as a part of the first conductive path <NUM>. The human skin capacitance is transmitted to the inside of the handle assembly <NUM>.

Referring to <FIG> and <FIG>, in another embodiment of the present invention, the handle assembly <NUM> further includes an inner shell <NUM> mounted in the casing <NUM>, a second conductor <NUM> mounted on the inner shell <NUM>, and a third conductor <NUM> mounted on the inner shell <NUM> and is electrically connected to the second conductor <NUM>. The circuit board assembly <NUM> is mounted on the inner shell <NUM>. The second conductor <NUM> is abutted on one of the elastic members <NUM>, and the third conductor <NUM> is electrically connected to the first receiving end 211a. The third conductor <NUM> may be assembled to the inner shell <NUM> by riveting or other mechanical connection. The use of the inner shell <NUM> facilitates the assembly of devices such as the circuit board assembly <NUM>. The signal is transmitted to the first receiving end 211a through the second conductor <NUM> and the third conductor <NUM>, and the assembly is convenient and the structure is compact.

Referring to <FIG>, in another embodiment of the present invention, the second conductor <NUM> is disposed on the upper surface of the upper end platform <NUM> of the inner shell <NUM>; the third conductor <NUM> is strip-shaped and disposed on the outer surface of the inner shell <NUM>, and one end of the third conductor <NUM> is located on the lower surface of the upper end platform <NUM> of the inner shell <NUM>; the second conductor <NUM> and the third conductor <NUM> are respectively provided with a round hole, and the screws <NUM> pass through the round hole of the second conductor <NUM>, the round hole of the upper end platform <NUM>, and the round hole of the third conductor <NUM>, to fixedly connect the third conductor <NUM>, the inner shell <NUM>, and the second conductor <NUM>. The second conductor <NUM> and the third conductor <NUM> are electrically connected by screws <NUM> passing through the inner shell <NUM>. The fixing buckle <NUM> of the upper cover <NUM> is assembled together with the engagement hole <NUM> on the top edge of the inner shell <NUM>, so that one of the elastic members <NUM> is connected to the second conductor <NUM>.

Referring to <FIG> and <FIG>, in another embodiment of the present invention, when the holder <NUM> is served as the first end of the first conductive path <NUM>, the first conductive path <NUM> of the inductive shaver passes through the holder <NUM>, the head cover <NUM>, the snap-fit member <NUM>, the first conductor <NUM>, the floating pressing plate <NUM>, the floating elastic member <NUM>, the connecting seat <NUM>, the upper cover <NUM>, the latch fastener <NUM>, the elastic member <NUM>, the second conductor <NUM>, the screws <NUM>, and the third conductor <NUM> and finally transmitted to the first receiving end 211a of the circuit board assembly <NUM>.

When the cutters <NUM> are served as the first end of the first conductive path <NUM>, the first conductive path <NUM> of the inductive shaver passes through the cutters <NUM>, the holder <NUM>, the head cover <NUM>, the snap-fit member <NUM>, the first conductor <NUM>, the floating pressing plate <NUM>, the floating elastic member <NUM>, the connecting seat <NUM>, the upper cover <NUM>, the latch fastener <NUM>, the elastic member <NUM>, the second conductor <NUM>, the screws <NUM>, and the third conductor <NUM> and finally transmitted to the first receiving end 211a of circuit board assembly <NUM>.

Specifically, the surfaces of the above parts are treated with a conductive coating to achieve a conductive state, and are assembled into a complete first conductive path <NUM> through structural cooperation between the parts.

Referring to <FIG> and <FIG>, in another embodiment of the present invention, the circuit board assembly <NUM> further includes a touch signal processor <NUM>, the first receiving end <NUM> a is arranged on the touch signal processor <NUM>, and the controller <NUM> is electrically connected with the touch signal processor <NUM>. The touch signal processor <NUM> belongs to the prior art, and the touch signal processor <NUM> can receive electrical signals, determine the magnitude of the capacitance change, and then output a trigger signal to the controller <NUM>. Specifically, a touch signal processor <NUM> with a model of ASC8022S or BS83A02C can be used. When there is no human skin <NUM> approaching the holder <NUM> (or cutters <NUM>), there is no capacitor Cf1 formed between the human skin <NUM> and the ground, only the reference capacitor Cp1 on the circuit board assembly <NUM>; when there is human skin <NUM> approaching the holder <NUM> (or cutters <NUM>), the first inductive capacitor Cf1 is formed between the holder <NUM> (or cutters <NUM>) and the ground, the Cf1 and Cp1 are connected in parallel. Before and after the human skin <NUM> approaches the holder <NUM> (or the cutters <NUM>), the total capacitor produces a capacitance change after entering the touch signal processor <NUM>. This total capacitance change causes the change of the internal oscillation frequency or charging and discharging time of the touch signal processor <NUM>, so that the touch signal processor <NUM> can detect the touch signal TI, and the touch signal processor <NUM> thus generates the trigger signal TO (touch output level signal) to the controller <NUM>; when there is no touching or approaching, TO has no valid signal outputting. When the controller <NUM> detects a valid signal TO, the controller <NUM> outputs relevant signals to the motor <NUM> through an internal interrupt processing, thereby, the motor is controlled to rotate and then to rotate the rotating cutter head <NUM> in the cutting unit <NUM>. The controller <NUM> is connected to the power source <NUM> to power the various devices. The power source <NUM> can be a battery provided within the casing <NUM>.

Referring to <FIG>, in another embodiment of the present invention, the handle assembly <NUM> further includes a wake-up sensor for switching the motor <NUM> to a standby state. The arrangement of the wake-up sensor can avoid the situation that only the first conductive path <NUM> is provided and the motor <NUM> will be activated by mistake. When in use, the motor <NUM> must be in the standby state by the wake-up sensor first, and then the first conductive path <NUM> can realize the induction of the human skin <NUM> approaching the holder <NUM> (or the cutters <NUM>) to activate the motor <NUM>.

Referring to <FIG> and <FIG>, in another embodiment of the present invention, the casing <NUM> is a conductive casing; the circuit board assembly <NUM> is provided with a second receiving end 211b configured for receiving a second inductive capacitor Cf2 between the casing <NUM> and the ground (GND) when the casing <NUM> approaches or contacts the human skin <NUM>' (hand), the circuit board assembly <NUM> is provided with a second capacitor <NUM> that is electrically connected to the second receiving end 211b and configured for determining a reference capacitor Cp2; the controller <NUM> is also configured for controlling the motor <NUM> being in a standby state When the second receiving end 211b obtains the second inductive capacitor Cf2; the wake-up sensor includes a second conductive path <NUM>, the casing <NUM> is served as the first end of the second conductive path <NUM>, and the second end of the second conductive path <NUM> is electrically connected to the second receiving end 211b. When in used, the casing <NUM> of the handle assembly <NUM> is held by hand firstly, and due that the human skin <NUM>' (hand) has a certain electric charge, when the human skin <NUM>' directly touches or approaches the conductive casing <NUM>, the casing <NUM> absorbs the human skin capacitance between the approaching or contacting position and the ground, that is, the second inductive capacitor Cf2. The second sensing capacitor Cf2 and the reference capacitor Cp2 are connected in parallel to the second receiving end 211b, and when the second receiving end 211b obtains the second inductive capacitor Cf2, the controller <NUM> wakes up the motor <NUM> to switch to the standby state. Specifically, the second receiving end 211b is provided on the above-mentioned touch signal processor <NUM>, and the connection between the second conductive path <NUM>, the second capacitor <NUM> and the second receiving end 211b is similar to that of the first conductive path <NUM>, the first capacitor <NUM> and the first receiving end 211a.

Specifically, when there is no human skin <NUM>' (hand) approaching the casing <NUM>, there is no second inductive capacitor Cf2 between the human skin <NUM>' and the ground, and only the reference capacitor Cp2 on the circuit board assembly <NUM>; when there is human skin <NUM> ' approaching the casing <NUM>, the second inductive capacitor Cf2 is formed between the casing <NUM> and the ground. Since Cf2 and Cp2 are connected in parallel, before and after the human skin <NUM>' approaches the casing <NUM>, the total capacitance produces a capacitance change after entering the second receiving end 211b. That is, the second receiving end 211b obtains the change signal of the second sensing capacitor Cf2, and at this time, the controller <NUM> controls the motor <NUM> in a standby state.

Claim 1:
A shaving head assembly (<NUM>), comprising:
a head cover (<NUM>);
a holder (<NUM>), mounted on the head cover (<NUM>);
a cutting unit (<NUM>), mounted on the holder (<NUM>), and the cutting unit (<NUM>) comprising cutters (<NUM>) mounted on the holder (<NUM>) and a rotating cutter head (<NUM>) arranged in cutters (<NUM>); and
a connecting seat (<NUM>), configured for connecting to a handle assembly (<NUM>), and the connecting seat (<NUM>) being electrically connected with the holder (<NUM>);
wherein the holder (<NUM>) is served as a first end of a first conductive path (<NUM>), and the first conductive path (<NUM>) is configured for receiving a first inductive capacitor (Cf1) between the holder (<NUM>) and the ground when the holder (<NUM>) approaches or contacts human skin (<NUM>); or
wherein the cutters (<NUM>) are served as a first end of a first conductive path (<NUM>), and the first conductive path (<NUM>) is configured for receiving a first inductive capacitor (Cf1) between the cutters (<NUM>) and the ground when the cutters (<NUM>) approach or contact human skin (<NUM>);
wherein the shaving head assembly (<NUM>) further comprises a gear frame (<NUM>) aligned with the head cover (<NUM>), a cover plate (<NUM>) mounted on one end of the gear frame (<NUM>), and a snap-fit member (<NUM>) mounted on the cover plate (<NUM>) and engaged with the head cover (<NUM>), the head cover (<NUM>) is electrically connected with the snap-fit member (<NUM>) and serves as a part of the first conductive path (<NUM>);
wherein the shaving head assembly (<NUM>) further comprises a floating pressing plate (<NUM>) arranged in the gear frame (<NUM>), and a floating elastic member (<NUM>) with two ends respectively abutting against the connecting seat (<NUM>) and the floating pressing plate (<NUM>), the snap-fit member (<NUM>) and the floating pressing plate (<NUM>) are electrically connected through a first conductor, and the floating pressing plate (<NUM>), the floating elastic member (<NUM>), and the connecting seat (<NUM>) are electrically connected in sequence and serve as a part of the first conductive path (<NUM>).