Electric fascia knife

Abstract

The utility model provides an electric fascia knife. The electric fascia knife comprises a shell, a knife body and a transmission assembly. The cutter body is driven by the transmission assembly to be movably arranged on the shell and can linearly move in a reciprocating mode in the set direction relative to the shell. An included angle is formed between the moving track of the cutter body and the length direction of the cutter body, and the cutter body comprises a base body part and a main body part arranged on the base body part. The two ends of the main body part are a connecting end used for being connected with the base body part and a contact end used for making contact with the skin of a user. In the thickness direction of the main body part, the two side surfaces of the main body part are inclined surfaces, and the thickness of the main body part is gradually reduced in the direction from the connecting end to the contact end. According to the electric fascia knife, the knife body is driven to move on the skin surface of a user in a reciprocating mode, the overall massage mode is milder, and the use comfort of the user is higher. Moreover, the massage effect can be effectively ensured while the use comfort of the user is ensured, so that the skin and muscles of the user can be effectively relaxed.

Description

TECHNICAL FIELD

[0001] The utility model relates to massage equipment technical field, especially a kind of electric fascia knife. BACKGROUND

[0002] Fascia gun is a kind of portable electric massage tool for relaxing muscle and fascia. At present, fascia gun on the market is with strong impact force, short stroke to the small range of organization area of human body, that is, with high frequency vibration or knock to help relieve muscle tension and fatigue.

[0003] However, the vibration force of fascia gun is usually large, improper use can cause adverse effects on physical health, such as damage to bones and joints, leading to bruising and muscle swelling. For people with muscle relaxation needs but sensitive to such injury risk (such as the elderly), fascia gun cannot meet their massage needs well. SUMMARY

[0004] One purpose of the utility model is to provide a kind of electric fascia knife that is more gentle to human body,

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An electric fascia knife, comprising:

[0007] A shell, which is internally arranged with a control circuit;

[0008] A tool body, which is movably arranged on the shell, and the tool body can reciprocate linearly along a set direction relative to the shell; the moving track of the tool body is arranged at an angle to the length direction of the tool body; the tool body comprises a base body portion and a main body portion arranged on the base body portion, two ends of the main body portion are respectively a connecting end and a contact end, the connecting end is used to connect with the base body portion, and the contact end is used to contact with user's skin; in the thickness direction of the main body portion, both side surfaces of the main body portion are inclined surfaces, and the thickness of the main body portion gradually decreases from the connecting end to the contact end.

[0009] A transmission assembly, which is arranged in the shell and connected to the control circuit and the tool body, and the transmission assembly is controlled by the control circuit and drives the tool body to reciprocate linearly along a set direction.

[0010] In one exemplary embodiment, the ratio of the thickness of the contact end to the thickness of the connecting end is less than or equal to 1:3.

[0011] In one exemplary embodiment, the end surface of the contact end is a contact surface, and the contact surface is arc-shapedly transitioned with the inclined surface.

[0012] In one example embodiment, the contact surface is a flat surface.

[0013] In one example embodiment, the contact surface is an arc surface, and the concave portion of the arc surface is directed away from the connection end.

[0014] In one example embodiment, the contact end is provided with a recess, which is formed by the surface of the contact end being recessed towards the base portion, and the surface of the blade body corresponding to the recess is an arc surface.

[0015] In one example embodiment, the two sides of the contact end in the length direction are arc chamfers; in the length direction of the blade body, the two side surfaces of the main body portion are transition surfaces, the transition surfaces are arc transitions with the inclined surfaces, and the transition surfaces are arc transitions with the contact surface.

[0016] In one example embodiment, the electric fascia knife comprises handles, and the handles and the blade body are respectively arranged on opposite sides of the shell.

[0017] In one example embodiment, the transmission assembly comprises a driving member, a linkage member, and a follower member, the driving member can drive the linkage member to rotate relative to the shell; the driving member is drivingly connected with the follower member, so that the follower member can move linearly relative to the shell; the blade body is connected with the follower member, so that when the linkage member rotates relative to the shell, the blade body can move relative to the shell following the follower member.

[0018] In one example embodiment, the linkage member is in a wheel structure, the rotation axis direction of the linkage member is perpendicular to the moving direction of the blade body, and the outer periphery of the linkage member is provided with linkage teeth; one side of the follower member is formed with follower teeth which are engaged with the linkage teeth; the follower member is engaged with the linkage member; the linkage member rotates relative to the shell, so that the follower member can reciprocatingly move linearly in a direction perpendicular to the rotation axis of the linkage member, to drive the blade body to move relative to the shell; or,

[0019] the linkage member is in a rod structure, the linkage member can rotate along its own axis direction, the axis direction of the linkage member is consistent with the moving direction of the blade body; the outer periphery of the linkage member is provided with external threads; the follower member is sleeved on the outside of the linkage member, and the inner wall of the follower member is provided with internal threads which are screw-fitted with the external threads; when the driving member drives the linkage member to rotate relative to the shell, the follower member can reciprocatingly move linearly along the axis direction of the linkage member, to drive the blade body to move relative to the shell.

[0020] In one example embodiment, the electric fascia knife comprises a connecting piece, one end of the connecting piece is connected with the knife body, and the other end of the connecting piece can be detachably connected with the follower through the shell.

[0021] In one example embodiment, the knife body is provided with a plurality of knife bodies, and each of the plurality of knife bodies is connected with the follower; at least one end of the shell is provided with a notch in communication with the inside of the shell, and when the knife body moves relative to the shell, the end of the follower can be extended to the outside of the shell or enter the inside of the shell through the notch.

[0022] From the above technical solution, the utility model has at least the following advantages and positive effects:

[0023] The electric fascia knife comprises a shell, a knife body and a transmission assembly. The knife body is movably arranged on the shell and can reciprocatingly move linearly along a set direction relative to the shell under the driving of the transmission assembly. The moving track of the knife body is arranged at an angle with the length direction of the knife body, so that the knife body performs a "Gua Sha" action on the skin surface of a user. The knife body comprises a base body and a main body arranged on the base body. The two ends of the main body are respectively a connecting end for connecting the base body and a contact end for contacting the skin of the user. In the thickness direction of the main body, the two side surfaces of the main body are both inclined surfaces, and the thickness of the main body gradually decreases from the connecting end to the contact end.

[0024] Compared with the high-frequency vibration or knocking massage mode of the existing fascia gun, the electric fascia knife in the technical solution of the application performs reciprocating scraping motion on the skin of a user, and does not produce high-impact force like the existing fascia gun. The knife body of the application contacts the skin by reciprocating movement, and the overall massage mode is more gentle, and the user has higher comfort. Moreover, the gradually decreasing thickness of the main body and the inclined surfaces of the two side surfaces make the shape of the main body similar to a "blade", which can better scrape the human skin to act on the subcutaneous tissue of the human body, such as fascia and muscle, so as to ensure the massage effect while ensuring the use comfort, and make the skin and muscle of the user reach an effective relaxation state. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a perspective structural schematic view of the electric fascia knife of one embodiment of the utility model.

[0026] Figure 2 is Figure 1 is another perspective view of the electric fascia knife shown in the figure.

[0027] Figure 3 is Figure 1 is an exploded view of the electric fascia knife shown in the figure.

[0028] Figure 4 is Figure 1 A-A direction cross-sectional view of the electric fascia knife shown in the figure.

[0029] Figure 5 is Figure 1 B-B direction cross-sectional view of the electric fascia knife shown in the figure.

[0030] Figure 6 is the explosion view of the electric fascia knife of another embodiment of the utility model.

[0031] The reference signs are explained as follows: 1, electric fascia knife; 10, shell; 11, opening; 12, protruding part; 13, notch; 20, knife body; 21, base part; 22, main body part; 221, connecting end; 222, contact end; 223, inclined surface; 224, contact surface; 225, recessed position; 226, transition surface; 30, transmission assembly; 31, driving piece; 311, main body; 312, rotating shaft; 32, linkage piece; 321, linkage tooth; 33, follower; 331, threaded hole; 332, follower tooth; 40, handle; 41, holding part; 42, connecting part; 50, connecting piece. DETAILED DESCRIPTION

[0032] The typical embodiments embodying the features and advantages of the utility model will be described in detail in the following description. It should be understood that the utility model can have various changes on different embodiments, which are all within the scope of the utility model, and the description and drawings in essence are used for description, not to limit the utility model.

[0033] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indication of direction or position relationship (such as up, down, left, right, front and back, etc.) is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation. When the position of these elements is changed, the indication of these directions is also changed accordingly.

[0034] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0035] The utility model provides a kind of electric fascia knife 1, compared with fascia gun, its massage mode is more gentle, specific scheme is explained by following embodiment.

[0036] Referring to Figure 1 As shown in the drawings, the electric fascia knife 1 comprises a housing 10, a blade body 20 and a transmission assembly 30. Among them, the transmission assembly 30 is arranged inside the housing 10, and the blade body 20 is arranged outside the housing 10. The blade body 20 is provided with a contact end 222 which is in contact with the skin of the user. And the blade body 20 is drivingly connected with the transmission assembly 30, so that the blade body 20 can move reciprocatingly and linearly along the set direction relative to the housing 10. That is, the contact end 222 of the blade body 20 performs reciprocating scraping motion on the skin of the human body to achieve the purpose of massage.

[0037] In combination Figure 1 And Figure 2 As shown in the drawings, the inside of the housing 10 is formed with a receiving space. The transmission assembly 30 is arranged in the receiving space. The bottom of the housing 10 is provided with an opening 11. The opening 11 extends along the length direction of the housing 10. One end of the blade body 20 can pass through the opening 11 to be connected with the transmission assembly 30 inside the housing 10. It can be understood that in the embodiment, the blade body 20 moves reciprocatingly and linearly along the length direction of the housing 10, and the maximum moving path of the blade body 20 is less than or equal to the length of the opening 11.

[0038] And, the opening 11 extending along the length direction of the housing 10 is beneficial to increase the moving path of the blade body 20, so that the acting area of the blade body 20 on the skin of the user can be increased, which helps to improve the massage efficiency and effectively improve the user's experience.

[0039] It should be noted that in other embodiments, the opening 11 can also be arranged in other directions of the housing 10, such as the width direction, the direction at a certain angle with the length direction of the housing 10, etc. The specific direction of the opening 11 can be arranged according to the overall shape of the housing 10 and other factors.

[0040] Continuing to refer to Figure 2 In the width direction of the housing 10, the width of the opening 11 is less than the length of the blade body 20. This arrangement can make the housing 10 be arranged in a relatively small volume structure, as long as it can accommodate the transmission assembly 30, and the blade body 20 can be arranged in a relatively large volume structure, which can provide a larger massage area for the user while making the overall structure of the electric fascia knife 1 compact and easy to carry and use by the user.

[0041] In some embodiments, the electric fascia knife 1 comprises a handle 40. The handle 40 is arranged on the housing 10. The handle 40 can be integrally formed with the housing 10. The user can hold the handle 40 and flexibly adjust the force and angle of the blade body 20 acting on the skin according to his own needs.

[0042] The handle 40 and the blade body 20 are respectively arranged on opposite sides of the shell 10. The handle 40 is arranged on the top of the shell 10. Compared with the handle 40 and the blade body 20 arranged at an angle, for example, the handle 40 is arranged on one end of the shell 10 along the length direction, the opposite arrangement of the handle 40 and the blade body 20 can ensure that the contact end 222 of the blade body 20 is more close to the skin of the user, effectively avoiding that the contact end 222 of the blade body 20 has an angle with the skin of the user when the user uses the electric fascia knife 1, and affecting the massage effect and the massage efficiency.

[0043] In some embodiments, the handle 40 includes a holding part 41 and connecting parts 42 arranged at both ends of the holding part 41. The connecting parts 42 are connected with the shell 10. The length extension direction of the holding part 41 can be the same as the movement track of the blade body 20, can be perpendicular to the movement track of the blade body 20, or can be arranged at an angle with the movement track of the blade body 20. The specific arrangement can be set according to actual needs, which is not limited herein.

[0044] Please refer to Figure 3 The length direction of the blade body 20 is arranged at an angle with the movement track of the blade body 20, which ensures that the blade body 20 can make a “Gua Sha” action on the skin of the user, rather than a “scratch” action, which is helpful to achieve the massage purpose.

[0045] In some embodiments, the movement track of the blade body 20 in the electric fascia knife 1 is perpendicular to the length direction of the blade body 20, so that the acting area of the blade body 20 on the skin of the user can be ensured to the maximum, which is helpful to improve the massage efficiency.

[0046] In some embodiments, the blade body 20 includes a base body part 21 and a main body part 22 arranged on the base body part 21. The base body part 21 and the main body part 22 can be integrally formed. The base body part 21 is connected with the transmission assembly 30. The two ends of the main body part 22 are respectively a connecting end 221 and a contact end 222. The connecting end 221 is used to connect with the base body part 21. The contact end 222 is used to contact with the skin surface of the user.

[0047] It should be noted that in other embodiments, the blade body 20 can not be provided with the base body part 21, but the connecting end 221 of the main body part 22 is directly connected with the transmission assembly 30.

[0048] Please refer to Figure 4In the thickness direction of the main body 22, both sides of the main body 22 are inclined surfaces 223, and the thickness of the main body 22 gradually decreases from the connecting end 221 towards the contact end 222. This design makes the shape of the main body 22 resemble a "blade," thereby enabling better scraping of human skin and allowing the blade 20 to act on subcutaneous tissues such as fascia and muscles, thus achieving a better massage effect and effectively relaxing the user's muscles and other tissues. Furthermore, this design also ensures the connection strength between the main body 22 and the base 21 or between the main body 22 and the transmission assembly 30.

[0049] For ease of description, Figure 4 The thickness of the contact end 222 is denoted by 'a', and the thickness of the connecting end 221 is denoted by 'b'. In some embodiments, the ratio of the thickness 'a' of the contact end 222 to the thickness 'b' of the connecting end 221 is less than or equal to 1:3. This means the ratio of the thickness 'a' of the contact end 222 to the thickness 'b' of the connecting end 221 can also be 1:4, 1:7, 1:8, 1:10, 1:12, etc. This design ensures that the user receives a scraping sensation while effectively preventing the contact end 222 from being too sharp and affecting the user experience.

[0050] The end face of the contact end 222 is the contact surface 224, and the contact surface 224 transitions to the inclined surface 223 in an arc shape. During the reciprocating linear movement of the blade body 20, especially when the blade body 20 changes from one direction to another, the arc transition between the contact surface 224 and the inclined surface 223 can effectively reduce the sharpness of the blade body 20 acting on the surface of human skin when changing direction, thereby providing users with a better user experience.

[0051] In some embodiments, the contact surface 224 can be a plane, which is particularly suitable for massaging large muscle areas, such as the waist, the back of the thighs, etc.

[0052] In some embodiments, the contact surface 224 can be an arc-shaped surface. The concave portion of the arc-shaped surface faces away from the connecting end 221. This configuration allows the pressure of the electric fascia knife 1 to be more concentrated, making it particularly suitable for massaging pain points, nodules, etc.

[0053] In some embodiments, a recess 225 is provided on the contact end 222. The recess 225 is formed by the surface of the contact end 222 being recessed towards the base portion 21, and the surface of the blade body 20 corresponding to the recess 225 is an arc-shaped surface. The recess 225 makes the electric fascia knife 1 particularly suitable for massaging areas such as the arms, shoulders, and neck.

[0054] Combination Figure 3 and Figure 5The two sides of the length direction of the contact end 222 are arc chamfers. In the length direction of the cutter body 20, the two side faces of the main body part 22 are transition faces 226, which are arc transitions with the inclined faces 223 and the contact faces 224. The arc transition between the faces makes the main body part 22 smooth and free of edges, which is less likely to damage the skin surface of the user, thereby providing a better use experience for the user.

[0055] Continuing to refer to Figure 3 The transmission assembly 30 in the electric fascia knife 1 includes a driving member 31, a linkage member 32, and a follower member 33. The driving member 31 can drive the linkage member 32 to rotate relative to the housing 10. The linkage member 32 also drives the follower member 33 to move linearly relative to the housing 10. The cutter body 20 is connected to the follower member 33. When the linkage member 32 is driven by the driving member 31 to rotate relative to the housing 10, the follower member 33 moves linearly relative to the housing 10, so that the cutter body 20 can move relative to the housing 10 along with the follower member 33.

[0056] The driving member 31 can be a motor. The housing 10 can be provided with a protrusion 12 on one side. The driving member includes a main body 311 and a rotating shaft 312. The main body 311 can be arranged in the protrusion 12. The linkage member 32 is mounted on the rotating shaft 312. The driving member 31 adjusts the rotating direction of the rotating shaft 312 at a certain period, so that the linkage member 32 can drive the follower member 33 to move linearly reciprocally along with the rotation of the rotating shaft 312, thereby realizing the reciprocating linear movement of the cutter body 20. It can be understood that the driving member 31 moves at different periods, which can realize different movement strokes of the cutter body 20.

[0057] Specifically in this embodiment, the linkage member 32 is in a wheel structure. The rotating shaft 312 of the linkage member 32 is perpendicular to the moving direction of the cutter body 20. The outer periphery of the linkage member 32 is provided with linkage teeth 321. One side of the follower member 33 is provided with follower teeth 332 which are engaged with the linkage teeth 321. Therefore, through the engagement between the follower member 33 and the linkage member 32, the follower member 33 can move linearly reciprocally along a direction perpendicular to the rotating shaft 312 of the linkage member 32 to drive the cutter body 20 to move relative to the housing 10.

[0058] In combination Figure 3 And Figure 4 The electric fascia knife 1 includes a connecting member 50, one end of which is connected to the cutter body 20, and the other end of which can pass through the housing 10 to be detachably connected to the follower member 33. In other words, the cutter body 20 is detachably connected to the follower member 33. The detachable connection of the cutter body 20 facilitates the user to replace the cutter body 20 with different forms of contact ends 222 according to the user's own needs. Moreover, this arrangement also makes the electric fascia knife 1 easy to disassemble, which can effectively reduce the storage space occupied.

[0059] It can be understood that in the embodiment, the linkage 32 is a gear. In other embodiments, the linkage 32 can also be a cam. The cam is arranged on the rotating shaft 312 of the linkage 32, and the distance from one end of the cam to the other end gradually increases with respect to the axis of the rotating shaft 312. The follower 33 can be a push rod. The cam is arranged on one side of the push rod and abuts against the push rod. The cam is driven to rotate one circle by the driving member 31, so as to enable the push rod to make one-time reciprocating linear movement.

[0060] In some embodiments, the connecting member 50 can be a stud, a stud, etc. The threaded hole 331 is arranged on the follower 33, and the connecting member 50 can be screwed on the follower 33. It should be noted that in other embodiments, the connecting member 50 and the follower 33 can also be connected in other ways, such as bonding, clamping, etc.

[0061] Referring to Figure 6 In some embodiments, the threaded hole 331 on the follower 33 can be provided with a plurality of threaded holes. The threaded hole 331 can be arranged on the end face of the follower 33 close to the opening 11, and / or arranged on the two side faces of the follower 33 along the moving direction of the follower 33. The connecting member 50 can be selectively installed in one threaded hole 331 of the follower 33, which means that the position of the cutter body 20 is not unique.

[0062] In some embodiments, the cutter body 20 can also be provided with a plurality of cutter bodies 20, and the plurality of cutter bodies 20 are simultaneously and spacedly arranged on the transmission assembly 30. That is, the connecting member 50 on the cutter body 20 is correspondingly installed in one threaded hole 331.

[0063] In some embodiments, the connecting member 50 can be arranged on one side face of the cutter body 20 along the thickness direction of the cutter body 20. At least one end of the housing 10 is provided with a notch 13 which is in communication with the inside of the housing 10, so that the end of the connecting member 50 can pass through the notch 13 and be connected to the follower 33.

[0064] The end of the follower 33 can pass through the notch 13. Specifically, when the cutter body 20 moves relative to the housing 10, the end of the follower 33 can be extended to the outside of the housing 10 or enter the inside of the housing 10 from the notch 13. Such arrangement helps to increase the movable distance of the follower 33 and effectively improve the action area of the cutter body 20 on the user's skin, so as to effectively improve the massage efficiency.

[0065] It should be noted that in other embodiments, the linkage 32 in the transmission assembly 30 can also be a rod structure. The linkage 32 is rotatable along its own axial direction, which is consistent with the moving direction of the blade body 20. The outer periphery of the linkage 32 is provided with external threads. At this time, the follower 33 is sleeved on the outside of the linkage 32, and the inner wall of the follower 33 is provided with internal threads that are adapted to be screwed with the external threads. The blade body 20 is connected to the follower 33, and the follower 33 is screwed with the linkage 32. The linkage 32 rotates relative to the housing 10, so that the follower 33 can reciprocatingly and linearly move along the axial direction of the linkage 32 to drive the blade body 20 to move relative to the housing 10.

[0066] In other embodiments, the transmission mode between the transmission assembly 30 and the blade body 20 can also be belt transmission, chain transmission, hydraulic transmission, pneumatic transmission, electromagnetic transmission, etc.

[0067] For example, when the transmission mode between the transmission assembly 30 and the blade body 20 is hydraulic transmission, the driving member 31 can be a hydraulic cylinder, and the linkage 32 and the follower 33 can be cancelled. The hydraulic cylinder includes a cylinder body provided on the housing 10 and a driving rod linearly and telescopically provided on the cylinder body. The driving rod is connected with the blade body 20, and the driving rod linearly extends and retracts, thereby driving the blade body 20 to move relative.

[0068] When the transmission mode between the transmission assembly 30 and the blade body 20 is pneumatic transmission, the driving member 31 can be a pneumatic cylinder, and the linkage 32 and the follower 33 can be cancelled. The pneumatic cylinder includes a cylinder body provided on the housing 10 and a driving rod linearly and telescopically provided on the cylinder body. The driving rod is connected with the blade body 20, and the driving rod linearly extends and retracts, thereby driving the blade body 20 to move relative.

[0069] The electric fascia knife 1 further includes a circuit board (not shown) provided in the housing 10. The circuit board is provided with a control circuit. The transmission assembly 30 is connected with the control circuit and controlled by the control circuit to generate an electrically controlled driving force, so that the blade body connected with the transmission assembly 30 can make reciprocating linear motion.

[0070] In some embodiments, a battery (not shown) can also be provided in the housing 10 to provide power required for the operation of the control circuit and the driving member 31 in the transmission assembly 30.

[0071] Further, the battery can be a rechargeable battery. The circuit board is provided with a charging interface. The housing 10 can be provided with an opening to expose the charging interface. The plug of an external charging device can be inserted through the opening to electrically connect the charging interface, thereby achieving charging of the rechargeable battery.

[0072] The electric fascia knife 1 in the technical scheme of the present application reciprocally scratches on the skin of the user, and does not generate high-intensity impact force like the existing fascia gun, the overall massage mode is more gentle, and the user has higher comfort in use. Moreover, through the structural arrangement of the shell 10 and the blade body 20, the electric fascia knife 1 can ensure that a larger massage area and comfortable massage effect can be provided for the user, and at the same time, the overall structure of the electric fascia knife 1 is compact and easy to carry and use for the user.

[0073] The above embodiments are only illustrative of the structure, and the structures in each embodiment are not fixedly combined. In the absence of structural conflicts, the structures in multiple embodiments can be arbitrarily combined for use.

[0074] Although the present application has been described with reference to several exemplary embodiments, it is understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present application can be embodied in various forms without departing from the spirit or essential characteristics thereof, it is understood that the above-described embodiments are not limited to any particular details, but are to be interpreted broadly within the spirit and scope of the appended claims, therefore all changes and modifications that fall within the meaning and range of equivalency of the claims are intended to be embraced by the appended claims.

Claims

1. An electric fascia cutter characterized by, The electric motorized fascia knife comprises a shell, a control circuit arranged inside the shell, a blade body movably arranged on the shell, the blade body being capable of reciprocating linear movement in a set direction relative to the shell, the movement track of the blade body being arranged at an angle to the length direction of the blade body, the blade body comprising a base body part and a main body part arranged on the base body part, two ends of the main body part being a connecting end and a contact end respectively, the connecting end being used for connecting with the base body part, and the contact end being used for contacting with the skin of a user, in the thickness direction of the main body part, both sides of the main body part are inclined surfaces, and the thickness of the main body part gradually decreases from the connecting end to the contact end. A transmission assembly is arranged inside the shell and connected with the control circuit and the blade body, the transmission assembly being controlled by the control circuit and driving the blade body to reciprocate linear movement in a set direction. The ratio of the thickness of the contact end to the thickness of the connecting end is less than or equal to 1:

3. The end surface of the contact end is a contact surface, and the contact surface and the inclined surface are arc-shaped transitions.

2. The motorized fascia knife of claim 1, wherein, The contact surface is a plane.

3. The motorized fascia knife of claim 1, wherein, The contact surface is an arc-shaped surface, and the concave part of the arc-shaped surface faces away from the connecting end.

4. The motorized fascia knife of claim 3, wherein, A recess is arranged on the contact end, the recess being recessed from the surface of the contact end towards the base body part, and the surface of the blade body corresponding to the recess is an arc-shaped surface.

5. The motorized fascia knife of claim 3, wherein, Both sides of the contact end in the length direction are arc-shaped chamfers; in the length direction of the blade body, both sides of the main body part are transition surfaces, the transition surfaces and the inclined surfaces are arc-shaped transitions, and the transition surfaces and the contact surface are arc-shaped transitions.

6. The motorized fascia knife of claim 1, wherein, The electric motorized fascia knife comprises a handle, the handle and the blade body being arranged on opposite sides of the shell respectively.

7. The motorized fascia knife of claim 3, wherein, The transmission assembly comprises a driving member, a linkage member and a follower, the driving member being capable of driving the linkage member to rotate relative to the shell; 8. The motorized fascia knife of claim 1, wherein, The driving member and the follower are drivingly connected, so that the follower is capable of linear movement relative to the shell; 9. The motorized fascia knife of claim 1, wherein, The blade body is connected with the follower, so that when the linkage member rotates relative to the shell, the blade body can follow the follower to move relative to the shell. The linkage member is in a wheel structure, the rotation axis direction of the linkage member being perpendicular to the movement direction of the blade body, the outer periphery of the linkage member being provided with linkage teeth; one side of the follower is formed with follower teeth meshing with the linkage teeth; the follower and the linkage member are meshingly connected; the linkage member rotates relative to the shell, so that the follower can reciprocatingly linearly move in a direction perpendicular to the rotation axis of the linkage member, to drive the blade body to move relative to the shell; or, ​ 10. The motorized fascial knife of claim 9, wherein, ​ The linkage is a rod-shaped structure, the linkage can rotate along its own axial direction, the axial direction of the linkage is consistent with the moving direction of the cutter body; the outer periphery of the linkage is provided with external threads; the follower is sleeved on the outside of the linkage, and the inner wall of the follower is provided with internal threads which are adapted to be screwed with the external threads; when the driving member drives the linkage to rotate relative to the shell, the follower can reciprocatingly and linearly move along the axial direction of the linkage to drive the cutter body to move relative to the shell.

11. The motorized fascia knife of claim 10, wherein, The electric fascia knife comprises a connecting member, one end of the connecting member is connected with the cutter body, and the other end of the connecting member can be detachably connected with the follower through the shell.

12. The motorized fascial knife of claim 11, wherein, The cutter body is provided with a plurality of cutter bodies, and the plurality of cutter bodies are connected to the follower; at least one end of the shell is provided with a notch which is in communication with the inside of the shell, and when the cutter body moves relative to the shell, the end portion of the follower can be extended to the outside of the shell or entered into the inside of the shell through the notch.

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