Sensing structure and shaver

By designing the induction structure in the razor and sensing micro charges with the pin and circuit board, the automatic start and shutdown function is achieved without manual buttons, solving the problem of manual operation and high cost of existing razors, simplifying the use process and reducing costs.

CN222680989UActive Publication Date: 2025-03-28SHANGHAI FLYCO ELECTRICAL APPLIANCE
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Patent Information

Application Number
CN202420426647.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-06
Publication Date
2025-03-28
Estimated Expiration
2034-03-06

AI Technical Summary

Technical Problem

The existing razor uses button switches and toggle switches, which require manual operation and are cost-effective, and the physical keys are exposed and require a waterproof design.

Method used

A sensing structure is designed, and the first conduction needle is used to float and conduct the knife net. The second conduction needle is connected to the first conduction needle and the circuit board, so that the circuit board can sense the micro charge on the surface of the human skin to start the shaver, and release the knife net to automatically close it.

Benefits of technology

The operation without physical buttons is achieved, simplifies the use process, reduces costs, and avoids the complexity of the waterproof design.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of shavers, and provides an induction structure and a shaver, the induction structure comprises a first conduction elastic needle and a second conduction elastic needle, and the first conduction elastic needle is installed on an elastic knife rest in a floating mode and is suitable for being in contact conduction with a knife net; the second conduction vibrating needle is mounted on the main body shell and is suitable for conducting the first conduction vibrating needle and the circuit board; and after the knife net is pressed, the knife net floats and extrudes the first conduction vibrating needle, and the first conduction vibrating needle is communicated with the second conduction vibrating needle, so that the circuit board can identify human body micro-charges through the second conduction vibrating needle, the first conduction vibrating needle and the knife net. The shaver includes a sensing structure. According to the induction structure and the shaver, the first conduction vibrating needle is in floating conduction with the shaver net, and the second conduction vibrating needle is in conduction connection with the first conduction vibrating needle and the circuit board, so that after the shaver net is pressed, the circuit board can sense micro charges on the surface of the skin of the human body and start the shaver; when the shaver net is loosened, the circuit board automatically turns off the shaver, no entity key is arranged, and operation is simple and practical.
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Description

Technical Field

[0001] The utility model relates to the technical field of shavers, and further relates to an induction structure and a shaver. Background Art

[0002] Most existing shavers use push-button switches and toggle switches, which need to be manually operated to turn the shaver on and off when in use. Moreover, the push-button switch and toggle switch are exposed on the outside of the shaver, so the push-button switch and toggle switch need to be waterproofed, which is costly. Utility Model Content

[0003] In view of the above technical problems, the purpose of the utility model is to provide a sensing structure and a shaver, in which a first conductive spring pin is floatingly conductive with a blade net, and a second conductive spring pin is conductively connected to the first conductive spring pin and a circuit board, so that after pressing the blade net, the circuit board can sense the micro-charge on the surface of human skin and start the shaver; when the blade net is released, the circuit board automatically turns off the shaver. There are no physical buttons, and the operation is simple and practical.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a sensing structure installed on a shaver, wherein the shaver comprises a head cover, a blade net and a main body shell, wherein the head cover is detachably installed on the main body shell, an elastic blade holder which limits the blade net is also provided inside the head cover, and a circuit board is provided inside the main body shell; the sensing structure comprises a first conductive spring pin and a second conductive spring pin, wherein the first conductive spring pin is floatingly installed on the elastic blade holder and is suitable for contacting and conducting with the blade net; the second conductive spring pin is installed on the main body shell, and the second conductive spring pin is suitable for conducting between the first conductive spring pin and the circuit board; when in use, after the human skin presses the blade net, the blade net floats and squeezes the first conductive spring pin, and the first conductive spring pin is connected with the second conductive spring pin, so that the circuit board can identify the micro-charge of the human body through the second conductive spring pin, the first conductive spring pin and the blade net.

[0005] In some embodiments, the first conductive spring needle is always in contact with the knife net, the first conductive spring needle includes a first conductive block, a second conductive block and an elastic conductive member, the first conductive block is located at an end of the first conductive spring needle close to the knife net, the second conductive block is sleeved on an end of the first conductive block away from the knife net, and the elastic conductive member is arranged on the inner side of the second conductive block and connected to the first conductive block;

[0006] After pressing the knife net, the first conductive block is pushed to move relative to the second conductive block and squeeze the elastic conductive member to adapt to the floating of the knife net.

[0007] In some embodiments, the knife net includes a first mesh cover and a second mesh cover, the first mesh cover is arranged on the outside of the second mesh cover, the first conductive block is conductively connected to the second mesh cover; the second conductive block is conductively connected to the second conductive spring pin.

[0008] In some embodiments, the elastic knife holder is provided with a first mounting hole and a second mounting hole that are connected to each other, the first mounting hole is relatively close to the knife net, the second conductive block includes a mounting portion and an abutment portion, the mounting portion is fixedly installed in the first mounting hole, the abutment portion is fixedly installed in the second mounting hole, and the diameter of the second mounting hole is larger than that of the first mounting hole.

[0009] In some embodiments, a knife holder knob for fixing the elastic knife holder is provided at the center of the bottom of the elastic knife holder, a placement slot is provided at the top of the main body shell, and four first conductive spring pins are symmetrically arranged at the four corners of the knife holder knob along the length and width directions of the main body shell.

[0010] In some embodiments, an abutment frame is further provided on the top of the elastic knife holder, and the abutment frame abuts against the bottom of the head cover. A floating groove is also provided on the abutment frame, and the first mesh cover side wall of the knife net is suitable for floating in the floating groove.

[0011] In some embodiments, two of the second conductive spring pins are arranged on one side of the width direction of the main body shell and are spaced apart along the length direction of the main body shell. No matter whether the head cover is installed in either direction, the second conductive spring pin is always suitable for mutual conduction with the first conductive spring pin.

[0012] In some embodiments, two of the second conductive spring pins are spaced apart on both sides of the tool holder knob, and ends of the two second conductive spring pins away from the first conductive spring pin are connected to the circuit board through a connector.

[0013] In some embodiments, the tool holder knob is further provided with a first magnetic component, and the main body shell is further provided with a second magnetic component, and the first magnetic component and the second magnetic component match each other, so that the head cover can be detachably installed on the main body shell.

[0014] According to another aspect of the present application, a shaver is further provided, comprising any one of the sensing structures of the above preferred embodiments.

[0015] Compared with the prior art, the induction structure provided by the utility model has at least one of the following beneficial effects:

[0016] 1. The first conductive spring pin is connected to the blade net in a floating manner, and the second conductive spring pin is connected to the first conductive spring pin and the circuit board, so that after pressing the blade net, the circuit board can sense the micro-charge on the surface of the human skin and start the shaver; when the blade net is released, the circuit board automatically turns off the shaver. There is no physical button, and the operation is simple and practical.

[0017] 2. The first conductive block is movably installed on the second conductive block, so that the first conductive block and the knife net are floatingly conductive, with a simple structure and low cost; the bottom diameter of the second conductive block is larger than the top diameter, making the conduction between the first conductive spring pin and the second conductive spring pin easier and more convenient, and preventing the second conductive spring pin and the second conductive spring pin from being slightly misaligned due to tolerance and other reasons, so that the induction structure cannot be conductive.

[0018] 3. Four first conductive spring pins are symmetrically arranged at the four corners of the tool holder knob along the length and width directions of the main body shell. When the head cover is assembled forward and reverse, the first conductive spring pins are always arranged at the corresponding positions of the head cover and the main body shell, which is simple to assemble and convenient to disassemble and use.

[0019] 4. The second mesh cover of the knife net abuts against the first conductive spring pin, and the outer wall of the first mesh cover is arranged in the floating groove of the abutting frame on the elastic knife frame, so that the knife net floats up and down more stably.

[0020] 5. The first magnetic part and the second magnetic part match each other, so that the head cover can be detachably installed on the main body shell, which is convenient for disassembly and has a good operating experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0022] Figure 1 It is the overall picture of the razor;

[0023] Figure 2 It is a cross-section of a razor;

[0024] Figure 3 It is a diagram of the structure of the skull;

[0025] Figure 4 It is the structural diagram of the main shell;

[0026] Figure 5 It is an exploded view of the skull;

[0027] Figure 6 It is the position diagram of the knife net and the first conductive spring needle;

[0028] Figure 7 It is a structural diagram of the first conductive spring needle;

[0029] Figure 8It is a structural diagram of the elastic tool holder;

[0030] Fig. 9 It is the internal view of the main body shell;

[0031] Fig.10 This is the connection diagram between the second conductive spring pin and the circuit board.

[0032] Description of Figure Numbers:

[0033] Head cover 1, elastic knife holder 11, first mounting hole 111, second mounting hole 112, knife holder knob 113, first magnetic member 1131, abutment frame 114, floating groove 1141, first conductive spring pin 12, first conductive block 121, second conductive block 122, mounting portion 1221, abutment portion 1222, knife net 2, first mesh cover 21, second mesh cover 22, main body shell 3, placement slot 30, second conductive spring pin 31, second magnetic member 32, connector 4, circuit board 5. DETAILED DESCRIPTION

[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0035] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0036] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0037] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0038] In addition, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. It should be noted that the above embodiments can be freely combined as needed. The above are only preferred implementations of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the scope of protection of the utility model.

[0039] refer to Figure 1 to Figure 2 The utility model provides a sensing structure, which is installed on a shaver. The shaver includes a head cover 1, a blade net 2 and a main body shell 3. The head cover 1 is detachably installed on the main body shell 3. An elastic blade holder 11 for limiting the blade net 2 is also provided inside the head cover 1. A circuit board 5 is provided inside the main body shell 3. The sensing structure includes a first conductive spring pin 12 and a second conductive spring pin 31. The first conductive spring pin 12 is floatingly installed on the elastic blade holder 11 and is suitable for contacting and conducting with the blade net 2. The second conductive spring pin 31 is installed on the main body shell 3. The second conductive spring pin 31 is suitable for conducting the first conductive spring pin 12 and the circuit board 5. When in use, human skin presses the blade net 2, the blade net 2 floats and squeezes the first conductive spring pin 12, and the first conductive spring pin 12 is connected with the second conductive spring pin 31, so that the circuit board 5 can identify human micro-charges through the second conductive spring pin 31, the first conductive spring pin 12 and the blade net 2.

[0040] In this embodiment, the first conductive spring pin 12 is floatingly conductive with the blade net 2, and the second conductive spring pin 31 is conductively connected to the first conductive spring pin 12 and the circuit board 5, so that after pressing the blade net 2, the circuit board 5 can sense the micro-charge on the surface of the human skin and start the shaver; when the blade net 2 is released, the circuit board 5 automatically turns off the shaver. There is no physical button, and the operation is simple and practical.

[0041] Specifically, the first conductive spring pin 12 plays a role in both floating the knife net 2 and conducting. The first conductive spring pin 12 is installed on the elastic knife holder 11 and relatively located below the knife net 2. The end of the first conductive spring pin 12 away from the knife net 2 is in conduction with the second conductive spring pin 31.

[0042] It is worth noting that in this embodiment, when the knife net 2 is pressed, the elastic knife holder 11 will also float slightly, but the elastic knife holder 11 does not play a major floating role, and the floating of the knife net 2 still mainly depends on the compression of the first conductive elastic pin 12. At the same time, the first conductive elastic pin 12 and the knife net 2 can both abut against each other, so that the first conductive elastic pin 12 and the knife net 2 are always conductive, and after pressing the knife net 2, the first conductive elastic pin 12 is compressed, and a slight gap can be left between the first conductive elastic pin 12 and the knife net 2. After pressing the knife net 2, the knife net 2 floats and abuts against the first conductive elastic pin 12 for conduction. The positional relationship between the first conductive elastic pin 12 and the knife net 2 is not further limited by the present utility model, and all of this is within the protection scope of this application.

[0043] Further, refer to Figures 3 to 7 The first conductive spring pin 12 is always in contact with the knife net 2. The first conductive spring pin 12 includes a first conductive block 121, a second conductive block 122 and an elastic conductive member. The first conductive block 121 is located at an end of the first conductive spring pin 12 close to the knife net 2, and the second conductive block 122 is sleeved on an end of the first conductive block 121 away from the knife net 2. The elastic conductive member is arranged on the inner side of the second conductive block 122 and connected to the first conductive block 121; after pressing the knife net 2, the first conductive block 121 is pushed to move relative to the second conductive block 122 and squeeze the elastic conductive member to adapt to the floating of the knife net 2.

[0044] In this embodiment, the first conductive block 121 is movably mounted on the second conductive block 122, so that the first conductive block 121 and the knife net 2 are floatingly conductive, with a simple structure and low cost.

[0045] Specifically, the elastic knife holder 11 is provided with a first mounting hole 111 and a second mounting hole 112 which are connected to each other. The first mounting hole 111 is relatively close to the knife net 2. The second conductive block 122 includes a mounting portion 1221 and abutting portion 1222. The mounting portion 1221 is fixedly mounted on the first mounting hole 111, and the abutting portion 1222 is fixedly mounted on the second mounting hole 112. The diameter of the second mounting hole 112 is larger than that of the first mounting hole 111, and the corresponding abutting portion 1222 of the first conductive elastic pin 12 has a larger diameter than that of the mounting portion 1221, so that the conduction between the first conductive elastic pin 12 and the second conductive elastic pin 31 is easier and more convenient, and prevents the second conductive elastic pin 31 from being slightly misaligned with each other due to tolerance and other reasons, so that the sensing structure cannot be turned on. Moreover, the diameter of the abutment portion 1222 of the first conductive elastic pin 12 is larger than the diameter of the mounting portion 1221, so that the installation of the first conductive elastic pin 12 and the elastic knife holder 11 is more stable, and the conduction between the first conductive elastic pin 12 and the second conductive elastic pin 31 is more stable. The first conductive elastic pin 12 will not be misaligned or moved away due to the abutment of the second conductive elastic pin 31, thereby avoiding poor contact between the first conductive elastic pin 12 and the second conductive elastic pin 31. Among them, the second conductive elastic pin 31 and the first conductive elastic pin 12 can have the same structure or different structures. Correspondingly, the second conductive block 122 and the second conductive elastic pin 31 can be connected after the elastic knife holder 11 floats, or the second conductive block 122 and the second conductive elastic pin 31 are always connected. After pressing the knife net 2, the knife net 2 floats and squeezes the first conductive elastic pin 12, and the elastic knife holder 11 floats and squeezes the second conductive elastic pin 31.

[0046] It is worth noting that the knife net 2 includes a first mesh cover 21 and a second mesh cover 22. The first mesh cover 21 is arranged on the outside of the second mesh cover 22. The first conductive block 121 is always conductive with the second mesh cover 22; the second conductive block 122 is conductive with the second conductive spring pin 31. Elastic conductive parts include but are not limited to elastic structures such as springs. The specific structure of the first conductive spring pin 12 and the second conductive spring pin 31 includes but is not limited to the present embodiment, and can also be an ultra-large flow structure similar to a probe connector, a bevel plus ball structure, a bevel structure, a reverse drilling structure, and a double contact structure, which are all commonly used technologies by those skilled in the art and are within the protection scope of this application.

[0047] Further, refer to Figure 3 A knife holder knob 113 for fixing the elastic knife holder 11 is provided at the center of the bottom of the elastic knife holder 11, a placement groove is provided at the top of the main body shell 3, and four first conductive spring pins 12 are symmetrically arranged at the four corners of the knife holder knob 113 along the length direction and width direction of the main body shell 3.

[0048] In this embodiment, the four first conductive spring pins 12 are symmetrically arranged at the four corners of the tool holder knob 113 along the length direction and the width direction of the main shell 3. When the head cover 1 is assembled forward and reverse, the corresponding positions of the head cover 1 and the main shell 3 are always provided with the first conductive spring pin 12 and the second conductive spring pin 31 connected to the shell, which is simple to assemble and convenient to disassemble and use.

[0049] Specifically, refer to Fig. 9 and Fig.10 , two second conductive spring pins 31 are arranged at intervals on both sides of the tool holder knob 113, and the ends of the two second conductive spring pins 31 away from the first conductive spring pin 12 are connected through the connector 4 and connected to the circuit board 5. The connector 4 inputs the conductive charge to the inductive element of the circuit board 5. This connector 4 can also be set at any position of the two second conductive spring pins 31, including but not limited to being set at one end away from the first conductive spring pin 12. The two second conductive spring pins 31 are arranged on one side in the width direction of the main body shell 3 and are arranged at intervals along the length direction of the main body shell 3. No matter whether the head cover 1 is installed in any positive or negative direction, the second conductive spring pins 31 are always suitable for mutual conduction with the first conductive spring pin 12. It is worth noting that the two second conductive spring pins 31 can also be arranged on one side in the length direction of the main body shell 3 and are arranged at intervals along the width direction of the main body shell 3. The number of the first conductive spring pins 12 and the second conductive spring pins 31 is not limited in this application, as long as they can be mutually conductive, they are within the protection scope of this application. The two second conductive spring pins 31 can also be connected to the circuit board 5 separately, which belongs to the variant embodiment of the present application. In the present embodiment, two knife nets 2 are provided on the head cover 1, so four first conductive spring pins 12 are provided. In another embodiment, three knife nets 2 can be provided on the head cover 1, that is, six first conductive spring pins 12 are provided. The present application does not further limit the number of the first conductive spring pins 12, as long as they can match the second conductive spring pins 31.

[0050] In a modified embodiment, there may be four second conductive spring pins 31 and the positions thereof correspond to those of the first conductive spring pins 12. In another modified embodiment, there may be one or two first conductive spring pins 12, and a misplacement structure is provided on the head cover 1, so that the first conductive spring pins 12 and the second conductive spring pins 31 are conductive.

[0051] Further, refer to Figure 8 Abutment frame 114 is also provided on the top of the elastic knife holder 11 , and the abutment frame 114 abuts against the bottom of the head cover 1 . A floating groove 1141 is also provided on the abutment frame 114 , and the side wall of the first net cover 21 of the knife net 2 is suitable for floating in the floating groove 1141 .

[0052] In this embodiment, the second mesh cover 22 of the knife net 2 abuts against the first conductive elastic pin 12, and the outer wall of the first mesh cover 21 is arranged in the floating groove 1141 of the abutting frame 114 on the elastic knife frame 11, so that the knife net 2 floats up and down more stably.

[0053] Furthermore, the tool holder knob 113 is also provided with a first magnetic component 1131 , and the main body shell 3 is also provided with a second magnetic component 32 . The first magnetic component 1131 and the second magnetic component 32 match each other, so that the head cover 1 can be detachably installed on the main body shell 3 .

[0054] In this embodiment, the first magnetic member 1131 and the second magnetic member 32 match each other, so that the head cover 1 can be detachably installed on the main body shell 3, which is convenient for disassembly and has a good operating experience.

[0055] Specifically, a magnetic groove is provided at one end of the knife holder knob 113 away from the knife net 2, a first magnetic member 1131 is arranged in the magnetic groove, and a second magnetic member 32 is arranged inside the main body shell 3 and relatively located outside the bottom of the placement groove. The first magnetic member 1131 and the second magnetic member 32 include but are not limited to magnetic materials such as magnets and iron. It is worth noting that in this embodiment, the head cover 1 and the main body shell 3 are installed in the direction of magnetic attraction, but they can also be assembled by buckles, slots and other structures, which are easy to think of by those skilled in the art, and will not be further elaborated in this application.

[0056] Furthermore, the utility model provides a shaver, comprising the sensing structure in any of the above embodiments.

[0057] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred implementations of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

Claims

1. A sensing structure installed on a shaver, the shaver comprising a head cover, a blade net and a main body shell, the head cover is detachably installed on the main body shell, an elastic blade holder for limiting the blade net is provided inside the head cover, and a circuit board is provided inside the main body shell, characterized in that: include: A first conductive spring pin, which is floatingly mounted on the elastic knife holder and is suitable for contacting and conducting with the knife net; A second conductive spring pin, the second conductive spring pin is installed on the main body shell, and the second conductive spring pin is suitable for conducting the first conductive spring pin and the circuit board; When in use, after the human skin presses the knife net, the knife net floats and squeezes the first conductive elastic pin, and the first conductive elastic pin is connected to the second conductive elastic pin, so that the circuit board can identify human micro-charges through the second conductive elastic pin, the first conductive elastic pin and the knife net.

2. The sensing structure according to claim 1, characterized in that: The first conductive spring needle is always in contact with the knife net, and the first conductive spring needle includes a first conductive block, a second conductive block and an elastic conductive member, the first conductive block is located at an end of the first conductive spring needle close to the knife net, the second conductive block is sleeved on an end of the first conductive block away from the knife net, and the elastic conductive member is arranged on the inner side of the second conductive block and connected to the first conductive block; After pressing the knife net, the first conductive block is pushed to move relative to the second conductive block and squeeze the elastic conductive member to adapt to the floating of the knife net.

3. The sensing structure according to claim 2, characterized in that: The knife net comprises a first mesh cover and a second mesh cover, wherein the first mesh cover is arranged on the outside of the second mesh cover, the first conductive block is conductively connected to the second mesh cover, and the second conductive block is conductively connected to the second conductive spring pin.

4. The sensing structure according to claim 3, characterized in that: The elastic knife holder is provided with a first mounting hole and a second mounting hole which are connected to each other. The first mounting hole is relatively close to the knife net. The second conductive block includes a mounting portion and an abutting portion. The mounting portion is fixedly mounted on the first mounting hole. The abutting portion is fixedly mounted on the second mounting hole. The diameter of the second mounting hole is larger than that of the first mounting hole.

5. The sensing structure according to claim 2, characterized in that: A knife holder knob for fixing the elastic knife holder is provided at the center of the bottom of the elastic knife holder, a placement slot is provided at the top of the main shell, and four first conductive spring pins are symmetrically arranged at the four corners of the knife holder knob along the length and width directions of the main shell.

6. The sensing structure according to claim 3, characterized in that: The top of the elastic knife holder is also provided with an abutment frame, the abutment frame abuts against the bottom of the head cover, and the abutment frame is also provided with a floating groove, and the first net cover side wall of the knife net is suitable for floating in the floating groove.

7. The sensing structure according to claim 5, characterized in that: The two second conductive spring pins are arranged on one side of the width direction of the main body shell and are spaced apart along the length direction of the main body shell. No matter whether the head cover is installed in either direction, the second conductive spring pin is always suitable for mutual conduction with the first conductive spring pin.

8. The sensing structure according to claim 7, characterized in that: The two second conductive spring pins are spaced apart on both sides of the tool holder knob, and one end of the two second conductive spring pins away from the first conductive spring pin is connected to the circuit board through a connector.

9. The sensing structure according to claim 5, characterized in that: The tool holder knob is also provided with a first magnetic component, and the main body shell is also provided with a second magnetic component. The first magnetic component and the second magnetic component match each other, so that the head cover can be detachably installed on the main body shell.

10. A razor, characterized in that: A sensing structure comprising any one of claims 1-9.