Reciprocating motion mechanism and massage instrument

Abstract

The utility model relates to a massage instrument and an assembly in the field of nano-wafer massage infiltration promotion and micro-needle transdermal nursing, in particular to a reciprocating motion mechanism and a massage instrument using the reciprocating motion mechanism. Wherein the reciprocating motion mechanism comprises a driving motor; the eccentric wheel is provided with a base and a pushing part, and the pushing part is eccentrically arranged on the base; the transmission part is provided with a transmission seat and a transmission rod fixed on the transmission seat, the transmission seat is provided with a transmission inclined surface, and the transmission inclined surface faces the pushing part; the transmission rod sleeve is arranged at the end part of the transmission rod; the outer fixing piece is arranged outside the transmission piece; an elastic piece is arranged between the transmission rod sleeve and the outer fixing piece, the elastic piece has preset elastic force and can keep the transmission rod sleeve away from the outer fixing piece, and therefore the transmission inclined face and the pushing part are kept separated in the natural state. The mechanism can effectively reduce instrument noise, reduce abrasion between transmission parts and prolong the service life of the mechanism.

Description

[0001] This applicant has already filed an invention patent application for the same invention on the same day. Technical Field

[0002] The utility model relates to a massage instrument and a component in the field of nano-chip massage penetration promotion and micro-needle transdermal care, in particular to a reciprocating motion mechanism and a massage instrument using the mechanism. Background Art

[0003] Microneedle transdermal absorption technology uses microneedles to treat the skin's surface, improving drug absorption. Traditional microneedle treatments can cause bleeding, redness, and swelling, and require a long recovery period during which the skin must be kept away from moisture.

[0004] Nanochips are made of high-purity single-crystal silicon. Using a 3D etching process, they create an array of 80-nanometer-sized bumps on the surface of the silicon wafer. Nanochips are an innovative upgrade to traditional microneedle products. Using nanochips instead of microneedles for skin care significantly improves the transdermal absorption of active ingredients without causing bleeding, redness, swelling, or pain.

[0005] Microneedles or nanochips can be used in a variety of ways, one common use being as a device for skin penetration enhancement. These devices consist of a drive motor, a reciprocating transmission mechanism, and a vibrating rod, onto which the microneedles or nanochips are mounted. For example, the device disclosed in the authorized utility model patent "Skin Pen Massage Pen (CN211658693U)" promotes skin penetration. During use, the device drives the microneedles or nanochips to vibrate at high frequencies, providing frequent skin care.

[0006] However, existing penetration enhancement instruments have the following drawbacks: Once connected to the circuit, the instrument will continue to operate, generating a high level of noise that affects the user experience. Furthermore, the instrument's transmission mechanism will experience significant wear and tear over time, shortening its service life. Summary of the Invention

[0007] In order to solve the technical defects of existing massage instrument transmission mechanisms such as high wear, high operating noise, and short service life, the utility model provides a reciprocating motion mechanism. The reciprocating motion mechanism includes a drive motor electrically connected to a power source, and the drive motor has an output shaft;

[0008] an eccentric wheel, the eccentric wheel comprising a base and a pushing portion, the base being mounted on the output shaft and capable of rotating synchronously with the output shaft, the pushing portion being eccentrically disposed on the base and having a central axis thereof parallel to and not overlapping with the central axis of the output shaft;

[0009] a transmission member, the transmission member comprising a transmission seat and a transmission rod fixed to the transmission seat, the transmission seat having a transmission inclined surface, the transmission inclined surface facing the pushing portion and obliquely intersecting an extension line of a central axis of the pushing portion;

[0010] A transmission rod sleeve, the transmission rod sleeve being arranged at the end of the transmission rod;

[0011] an external fixing member, the external fixing member being arranged outside the transmission member;

[0012] An elastic member is provided between the transmission rod sleeve and the external fixing member. The elastic member has a preset elastic force and can keep the transmission rod sleeve away from the external fixing member, so that the transmission inclined surface and the pushing portion remain separated in a natural state.

[0013] The above technical solution is explained as follows.

[0014] Power source: The power source can be a wireless power source such as a disposable battery, a rechargeable battery, or a wired power source that needs to be connected to a wire or plug.

[0015] Elastic parts: Elastic parts can be springs, rubber sleeves, rubber rings, etc.

[0016] The transmission inclined surface is obliquely intersected with the extension line of the central axis of the pushing portion; “obliquely intersected” means that the extension line of the central axis of the pushing portion is not perpendicular to the transmission inclined surface.

[0017] Natural state: The "natural state" refers to the state of the various components of a reciprocating mechanism when no external force is acting on them. For example, in a reciprocating mechanism, the transmission member is subject to the preset elastic force of the elastic member. When there is no external force acting on the reciprocating mechanism, the transmission member remains separated from the eccentric wheel, and the transmission ramp remains separated from the driving part.

[0018] This technical solution features a completely new design for the reciprocating mechanism. Through the synergistic action of a unique elastic member, a transmission rod sleeve, and an external fixing member, the transmission member can be separated from the eccentric wheel in its natural state. When the user needs to use the instrument, the transmission connection between the transmission member and the eccentric wheel can be restored by pressing down on the transmission rod. In this innovative design, the elastic member and other structures realize the function of a "clutch", and the components only contact each other when reciprocating motion is required. In the standby state without the introduction head assembled, the transmission member and the eccentric wheel and other components remain separated even when the mechanism is powered. This design can effectively reduce wear between components and instrument noise, while extending the service life of the entire reciprocating mechanism. In addition, in this structure, the elastic member is arranged between the transmission rod sleeve and the external fixing member. The position of this structure is staggered with the eccentric wheel and other components, which can effectively reduce the radial thickness of the reciprocating mechanism, making the reciprocating mechanism more slender and sophisticated as a whole.

[0019] Preferably, the external fixing member includes a limiting sleeve that is sleeved on the exterior of the transmission rod, with the end of the elastic member connected to the limiting sleeve. In this preferred technical solution, the limiting sleeve can further constrain the left-right swing amplitude of the transmission rod, allowing the transmission rod to maintain stable axial reciprocating motion, thereby improving the motion stability of the reciprocating mechanism.

[0020] Preferably, the transmission rod sleeve can be detachably assembled on the end of the transmission rod, or the transmission rod sleeve and the transmission rod are integrally formed.

[0021] Preferably, the transmission seat is an inverted cylinder, the wall of which is sleeved onto the exterior of the eccentric, and the inner bottom of the cylinder has the transmission ramp. In this preferred technical solution, the cylindrical transmission seat sleeved onto the exterior of the eccentric further constrains the left-right swing amplitude of the transmission member, enhancing the stability of the axial reciprocating motion. Furthermore, this structure prevents the pusher from disengaging from the transmission ramp during reciprocating motion, thereby improving the stability of the transmission connection between the transmission member and the eccentric.

[0022] Preferably, the external fixing member is sleeved on the outside of the cylinder and the eccentric wheel. In this preferred technical solution, the external fixing member can better protect the transmission member and the eccentric wheel, and enhance the reliability of the transmission structure.

[0023] Preferably, the external fixing member is tightly connected to the housing of the drive motor.

[0024] The reciprocating motion mechanism of the present invention is assembled in a massage instrument to drive the microneedles or nanochips to move at high frequency, which can conveniently and quickly care for the skin. Therefore, the present invention also provides a massage instrument. The massage instrument includes a housing having an assembly end;

[0025] An introduction head fixing seat, the introduction head fixing seat is arranged at the assembly end;

[0026] It also includes the reciprocating motion mechanism according to any of the above technical solutions, the reciprocating motion mechanism is assembled in the housing, and the transmission rod in the reciprocating motion mechanism extends toward the assembly end;

[0027] The introduction head can be detachably assembled in the introduction head fixing seat. When the introduction head is assembled in the introduction head fixing seat, the introduction head abuts against the transmission rod and compresses the elastic part, while keeping the transmission inclined surface in contact with the pushing part.

[0028] In this technical solution, the shell of the massager can be designed into a shape suitable for the user to hold, such as a pistol shape, a straight pen shape, an arc shape, an L shape, etc. Since the reciprocating motion mechanism is slender and delicate as a whole, when assembled in the massager, the appearance of the massager can be designed to be more slender and aesthetically pleasing, and it is also convenient for the user to carry. In this technical solution, the introduction head is used as a consumable, which can be detachably assembled on the introduction head fixing seat. When the introduction head is not assembled, the eccentric wheel and the transmission member in the reciprocating motion mechanism remain in a separated state. At this time, the instrument noise of the massager is low, the pushing part of the eccentric wheel and the transmission inclined surface of the transmission seat are in a separated state, and there is no wear between the two transmission members; only when the introduction head is installed on the instrument, the introduction head abuts against the transmission rod and causes the eccentric wheel and the transmission member to form a connected transmission state, at which time the reciprocating motion mechanism drives the introduction head into a working state. This technical solution ensures that the instrument is only in working condition when the user is using the product, and remains in standby mode when the introduction head is not installed. This design can significantly reduce the wear of various components in the reciprocating motion mechanism, reduce the noise of the instrument, optimize the user experience, and extend the service life of the instrument.

[0029] Preferably, the introduction head includes: a connecting tube capable of being connected to the introduction head fixing seat; an introduction rod disposed in the connecting tube, the upper end of the introduction rod being provided with a massage unit, the lower end of the introduction rod being capable of abutting against the transmission rod sleeve; and an elastic return member, one end of the elastic return member being connected to the connecting tube and the other end being connected to the introduction rod. In this preferred technical solution, when the transmission member reciprocates in pushing the introduction rod, the elastic return member can keep the introduction rod against the transmission member, thereby ensuring the stability of the reciprocating motion.

[0030] Preferably, the connecting tube is threadedly connected or clamped on the introduction head fixing seat.

[0031] Preferably, a limiting portion is provided on the connecting tube, and the limiting portion can limit the connection depth between the connecting tube and the introduction head fixing seat.

[0032] Preferably, a mounting platform is detachably provided on the upper end of the introduction rod, and the massage unit is provided on the mounting platform.

[0033] Preferably, the massage unit comprises a base and a microstructure arrayed on the surface of the base, wherein the microstructure comprises at least one of bumps, microneedles, microknives, and microblades. It should be noted that the microstructure may be conical, multi-faceted, or other suitable shapes. The apex of the microstructure is micrometer-scale or smaller. Alternatively, the apex of the microstructure is nanometer-scale, such as 80 nanometers, 100 nanometers, or the like.

[0034] Preferably, the massage unit is at least one of a nanochip, a microneedle chip, a microchip, and a microblade chip. It should be noted that microneedle chips, microblade chips, and microchips are traditional microneedle products with micron-scale tip dimensions. Nanochips are made of high-purity single-crystal silicon, with a 3D etching process to form an array of nanometer-scale bumps on the silicon wafer surface. Nanochips are an upgraded and innovative product of traditional microneedle products.

[0035] Preferably, the connecting tube has a hollow channel, the introduction rod passes through the hollow channel, a first connecting portion is provided at one end of the hollow channel, and a second connecting portion is provided on the introduction rod. The elastic return member is arranged in the hollow channel and sleeved on the outside of the introduction rod, with the two ends of the elastic return member respectively connected to the first connecting portion and the second connecting portion. In this preferred technical solution, the elastic return member sleeves on the introduction rod and is installed in the hollow channel. This design can better protect the elastic return member and make the structure of the introduction head more stable.

[0036] Preferably, the second connecting portion is located in the hollow channel and can slide back and forth relative to the hollow channel. In this preferred technical solution, the second connecting portion can constrain the left and right swing amplitude of the introduction rod, thereby improving the stability of the axial reciprocating motion of the introduction rod.

[0037] Preferably, a contact platform is provided at the lower end of the guide rod, the circumscribed radius of which is greater than the inner diameter of the hollow channel, and which is capable of abutting against the transmission rod sleeve. In this preferred technical solution, the abutment platform not only enhances the connection reliability between the guide head and the reciprocating mechanism, but also serves to limit the reciprocating range of the guide rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a structural diagram of an embodiment of the reciprocating motion mechanism and massager of the utility model when the massager is not equipped with an introduction head.

[0039] Figure 2 It is a structural schematic diagram of an embodiment of the reciprocating motion mechanism and massager of the utility model, in which the massager is assembled with an introduction head and the introduction head moves to a first position.

[0040] Figure 3 It is a structural schematic diagram of an embodiment of the reciprocating motion mechanism and massager of the present utility model, in which the massager is assembled with an introduction head and the introduction head moves to the second position.

[0041] Reference Signs List

[0042] T. Massager, T1. Reciprocating mechanism; T2. Housing, T21. Assembly end, T210. Introduction head fixing seat; T3. Introduction head, T31. Connecting tube, T311. Limiting portion, T312. Hollow channel, T313. First connecting portion; T32. Introduction rod, T321. Assembly platform, T322. Contact platform, T323. Second connecting portion; T33. Elastic reset element.

[0043] 1. Drive motor, 10. Power source, 11. Output shaft; 2. Eccentric wheel, 21. Base, 22. Pushing part; 3. Transmission member, 31. Transmission seat, 310. Transmission inclined plane, 311. Cylinder wall, 32. Transmission rod, 321. Transmission rod sleeve; 4. External fixing member, 40. Screw, 41. Limiting sleeve; 5. Elastic member. DETAILED DESCRIPTION

[0044] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be noted that the "connection" in the text includes direct connection, that is, the two structures are directly connected in contact; it also includes indirect connection, that is, the two structures are indirectly connected together through a third structure. The orientation or position relationship indicated by the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and is not intended to limit the scope of protection. The terms "first" and "second" in the text are only for the convenience of explanation and do not limit a specific order or limit the scope of protection. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0045] To address the technical shortcomings of existing massage instruments, such as high wear, high noise levels, and short service life, the present invention provides a reciprocating mechanism. This reciprocating mechanism can be incorporated into a massage instrument that, when used with a detachable insert consumable, provides users with a quick and convenient skincare experience. The following provides a detailed explanation of the technical solution using examples. Example

[0046] Figure 1 This is a structural diagram of an embodiment of the reciprocating motion mechanism and massager of the utility model when the massager is not equipped with an introduction head. Figure 2 It is a structural schematic diagram of an embodiment of the reciprocating motion mechanism and massager of the utility model, in which the massager is assembled with an introduction head and the introduction head moves to a first position. Figure 3 It is a structural schematic diagram of an embodiment of the reciprocating motion mechanism and massager of the present utility model, in which the massager is assembled with an introduction head and the introduction head moves to the second position.

[0047] Structure of massager T

[0048] like Figure 1 As shown, the massager T has a shell T2, which is generally in the shape of a straight pen. Alternatively, the shell T2 can also be designed in a pistol shape, an arc shape, an L shape, etc. to meet the user's various aesthetic needs and grip requirements. The shell T2 has an assembly end T21, and the introduction head T3 used in conjunction with the massager T can be detachably assembled on the assembly end T21. The optional assembly methods include screw connection, clamping connection, etc. In this embodiment, the assembly end T21 is provided with an introduction head fixing seat T210, as shown in FIG. Figure 1 and Figure 2 As shown, the guide head fixing seat T210 has a threaded structure, and the guide head T3 can be connected to the guide head fixing seat T210 through the thread.

[0049] like Figure 1 As shown, in this embodiment, the reciprocating mechanism T1 is assembled in the housing T2. The reciprocating mechanism T1 has a drive motor 1. The drive motor 1 can be a DC motor or other suitable motor types. The drive motor 1 is powered by a power source 10. The power source 10 can be a wireless power source such as a disposable battery, a rechargeable battery, or a wired power source that requires a wire or plug. Figure 1 As shown, the power source 10 is arranged at the lower part of the shell T2, in a position convenient for the user to hold, and the corresponding charging terminal can be set at the lower end or lower side of the shell T2.

[0050] The driving motor 1 has an output shaft 11. Figure 1 As shown, an eccentric wheel 2 is provided on the output shaft 11. The eccentric wheel 2 has a base 21 and a pusher 22. In this embodiment, the base 21 is cylindrical, and a socket that cooperates with the output shaft 11 is provided at the bottom of the base 21. The output shaft 11 is fastened to the base 21 through the socket. The pusher 22 is arranged at the top of the base 21. The central axis of the pusher 22 is parallel to and does not overlap with the central axis of the output shaft 11. The pusher 22 is eccentrically arranged on the base 21. When the output shaft 11 drives the eccentric wheel 2 to rotate, the pusher 22 will rotate in a circle with the central axis of the output shaft 11 as the center line.

[0051] like Figure 1 As shown, a transmission member 3 is also matched above the eccentric wheel 2. The transmission member 3 includes a transmission seat 31 and a transmission rod 32. Figure 1 As shown, in this embodiment, the transmission seat 31 is an inverted cylinder, and the cylinder wall 311 of the cylinder is sleeved on the outside of the eccentric wheel 2. The inner bottom of the cylinder forms a transmission inclined surface 310, which is obliquely intersected with the extension line of the central axis of the pushing part 22, and the angle between the two is not equal to 90 degrees. Figure 1As shown, the transmission rod 32 is arranged on the transmission seat 31, the lower end of the transmission rod 32 is fixedly connected to the transmission seat 31, and the upper end of the transmission rod 32 extends toward the assembly end T21. A transmission rod sleeve 321 is installed on the upper end of the transmission rod 32. In this embodiment, the transmission rod sleeve 321 is detachably installed on the upper end of the transmission rod 32, and the optional connection methods are snap connection, screw connection, etc. Figure 1 As shown, in order to facilitate the assembly of the transmission rod sleeve 321, the upper end of the transmission rod 32 is radially reduced to form a neck to facilitate the insertion of the transmission rod sleeve 321. It should be noted that the transmission sleeve 321 can also be integrally formed with the upper end of the transmission rod 32.

[0052] like Figure 1 As shown, in this embodiment, an external fixing member 4 is further provided on the outside of the transmission member 3. The external fixing member 4 is fastened to the housing of the drive motor 1 by a screw 40. It is easy to understand that the external fixing member 4 can also be fixedly connected to the drive motor 1 by other suitable means such as snaps and welding. In addition, the external fixing member 4 can also be fixed on the shell T2 and maintain a fixed relative position with the drive motor 1. In this embodiment, the external fixing member 4 is sleeved on the outside of the cylinder of the transmission seat 31 and the outside of the eccentric wheel 2. The external fixing member 4 and the drive motor 1 cooperate with each other to protect the transmission seat 31 and the eccentric wheel 2, making the entire structure more closed, safe and stable. As shown Figure 1 As shown, the external fixing member 4 also has a limiting sleeve 41, which is sleeved on the outside of the transmission rod 32 to constrain the left and right swing amplitude of the transmission rod 32, so that the movement of the transmission rod 32 is more concentrated on the axial reciprocating motion.

[0053] An elastic member 5 is also provided between the external fixing member 4 and the transmission rod sleeve 321. The elastic member 5 can be a spring, a rubber sleeve, a rubber ring, etc. Figure 1 As shown, in this embodiment, the elastic member 5 is a spring, which is sleeved on the transmission rod 32 , with one end of the elastic member 5 connected to the transmission rod sleeve 321 and the other end connected to the limiting sleeve 41 .

[0054] The elastic member 5 has a preset elastic force that can keep the transmission rod sleeve 321 away from the external fixing member 4, so that the transmission inclined surface 310 and the pushing portion 22 remain separated in the natural state. In other words, when the reciprocating mechanism T1 is not subjected to external forces, the preset elastic force of the elastic member 5 keeps the transmission rod sleeve 321 pushed upward, so that the entire transmission member 3 remains separated from the eccentric wheel 2. At this time, the rotation of the eccentric wheel 2 does not contact the transmission member, and there is no wear between the two, and no operating noise is generated. This state is similar to the disengaged state in a clutch. When the transmission member 3 is subjected to downward pressure, the transmission member 3 moves downward and the elastic member 5 is compressed. At this time, the transmission inclined surface 310 maintains abutting contact with the pushing portion 22 of the eccentric wheel 2. When the eccentric wheel 2 rotates, the end of the pushing portion 22 will slide circumferentially on the transmission inclined surface 310. Since the transmission inclined surface 310 is obliquely intersected with the extension line of the central axis of the pushing portion, the pushing portion 22 pushes the transmission member 3 to move back and forth in the axial direction when sliding against the transmission inclined surface 310, thereby converting the rotation of the drive motor 1 into reciprocating linear motion.

[0055] Import header T3 structure

[0056] The introduction head T3 used in conjunction with the massager T includes a connecting tube T31, an introduction rod T32, and an elastic reset member T33. A threaded structure matching the introduction head fixing seat T210 is provided on the connecting tube T31, and the introduction head can be fixedly mounted on the massager T by screwing the thread. It is easy to understand that the connecting tube T31 can also be connected to the introduction head fixing seat T210 by snapping or plugging. Figure 2 As shown, a limiting portion T311 is further provided on the outer peripheral wall of the connecting tube T31. In this embodiment, the limiting portion T311 can be an annular boss, or a limiting bump or other suitable limiting structure. When the introduction head T3 is installed on the introduction head fixing seat T210, the limiting portion T311 can limit the engagement depth between the introduction head T3 and the introduction head fixing seat T210. Figure 2 or Figure 3 As shown, the connecting tube T31 in this embodiment further has an elongated hollow channel T312. A first connecting portion T313 is provided on the hollow channel T312.

[0057] The introduction rod T32 on the introduction head T3 is arranged in the connecting tube T31. Figure 2 or Figure 3As shown, in this embodiment, the introduction rod T32 passes through the hollow channel T312, and the introduction rod T32 can reciprocate along its own axis relative to the connecting tube T31. An assembly platform T321 is detachably provided on the upper end of the introduction rod T32, and a massage unit (not shown in the figure) is mounted on the assembly platform T321. The massage unit has a base and a microstructure arrayed on the surface of the base. The microstructure can be conical, polygonal or other suitable shapes. The size of the vertex of the microstructure is at the micron level or below. Optionally, the size of the vertex of the microstructure is at the nanometer level, such as 80 nanometers, 100 nanometers, etc. In this embodiment, the microstructure includes at least one of bumps, microcrystals, microneedles, micro knives, and micro blades. The massage unit can be a nano chip, a microneedle chip, a micro chip, a micro knife chip, etc. The material of the massage unit can be single crystal silicon, ceramics, polymers, metals, etc. The assembly platform T321 serves the function of carrying, replacing and assembling different massage units. As Figure 2 or Figure 3 As shown, the lower end of the guide rod T32 is provided with a contact platform T322, and the contact platform T322 can be formed integrally with the guide rod T32. Figure 2 As shown, a second connecting portion T323 is further provided on the introduction rod T32.

[0058] The elastic reset member T33 on the guide head is installed between the connecting tube T31 and the guide rod T32. The elastic reset member T33 can be a spring, a rubber sleeve, etc. Figure 2 or Figure 3 As shown, in this embodiment, the elastic return member T33 is sleeved on the guide rod T32, and one end thereof is connected to the first connection portion T313, and the other end is connected to the second connection portion T323.

[0059] Assembly and working process

[0060] When the guide head T3 is installed on the massager T, the connecting tube T31 is tightly connected to the guide head fixing seat T210, and the contact platform T322 at the lower end of the guide rod T32 abuts against the transmission rod sleeve 321 and presses the transmission member 3 as a whole downward, so that the transmission inclined surface 310 is in close contact with the pushing part 22. At this time, the guide head is assembled. In this state, the elastic member 5 and the elastic reset member T33 are both in a compressed state. The power source 10 supplies power to the drive motor 1 and during operation, the drive motor 1 drives the eccentric wheel 2 to rotate periodically, and the pushing part 22 abuts against the transmission inclined surface 310 and slides along the circumference of the transmission inclined surface, causing the transmission member 3 to reciprocate in the axial direction. Since the guide rod T32 is in close contact with the transmission member 3, the guide rod T32 will reciprocate synchronously with the transmission member 3, thereby driving the massage unit to reciprocate. The reciprocating motion of the transmission member 3, the guide rod T32 and the massage unit has an extreme position. For the convenience of explanation, Figure 2The position shown is the first position. In this embodiment, when the transmission member is in the first position, the massage unit is retracted into the interior of the connecting tube T31. Figure 3 The position shown is the second position. When the transmission member is in the second position, the massage unit extends out of the port of the connecting tube T31 and can effectively contact the skin.

[0061] like Figure 2 and Figure 3 As shown, in this embodiment, the assembly platform T321 is larger than the hollow channel T312, and the circumscribed radius of the contact platform T322 is larger than the inner diameter of the hollow channel T312. The assembly platform T321 and the contact platform T322 cooperate to limit the reciprocating range of the guide rod T32. This structure effectively prevents the guide rod T32 from detaching from the connecting tube T31. Furthermore, because the end surface area of ​​the contact platform T322 is larger than the cross-sectional area of ​​the guide rod T32, the contact platform T322 can more securely abut the transmission rod sleeve T321, thereby enhancing the stability of the transmission structure.

[0062] like Figure 2 and Figure 3 As shown, in this embodiment, the first connection portion T313 is disposed at the upper end of the hollow channel T312, and the second connection portion T323 is always located within the hollow channel T312. The first connection portion T313 and the second connection portion T323 cooperate with each other to effectively constrain the left and right swing amplitude of the introduction rod, thereby improving the stability of the introduction rod's axial reciprocating motion.

Claims

1. A reciprocating motion mechanism, comprising: a drive motor electrically connected to a power source and having an output shaft; an eccentric wheel, the eccentric wheel comprising a base and a pushing portion, the base being mounted on the output shaft and capable of rotating synchronously with the output shaft, the pushing portion being eccentrically disposed on the base and having a central axis thereof parallel to and not overlapping with the central axis of the output shaft; a transmission member, the transmission member comprising a transmission seat and a transmission rod fixed to the transmission seat, the transmission seat having a transmission inclined surface, the transmission inclined surface facing the pushing portion and obliquely intersecting an extension line of a central axis of the pushing portion; A transmission rod sleeve, the transmission rod sleeve being arranged at the end of the transmission rod; an external fixing member, the external fixing member being arranged outside the transmission member; It is characterized in that an elastic member is provided between the transmission rod sleeve and the external fixing member, the elastic member has a preset elastic force and can keep the transmission rod sleeve away from the external fixing member, so that the transmission inclined surface and the pushing part remain separated in a natural state.

2. The reciprocating motion mechanism according to claim 1, characterized in that: The external fixing member has a limiting sleeve, the limiting sleeve is sleeved on the outside of the transmission rod, and the end of the elastic member is connected to the limiting sleeve.

3. The reciprocating motion mechanism according to claim 1, characterized in that: The transmission rod sleeve can be detachably assembled on the end of the transmission rod, or the transmission rod sleeve and the transmission rod are integrally formed.

4. The reciprocating motion mechanism according to claim 1, characterized in that: The transmission seat is an inverted cylinder, the cylinder wall of the cylinder is sleeved on the outside of the eccentric wheel, and the inner cylinder bottom of the cylinder is provided with the transmission inclined surface.

5. The reciprocating motion mechanism according to claim 4, characterized in that: The external fixing member is sleeved on the outside of the cylinder and the eccentric wheel.

6. The reciprocating motion mechanism according to claim 5, characterized in that: The external fixing member is tightly connected to the housing of the driving motor.

7. A massager, comprising: a housing having a mounting end; The guide head fixing seat is arranged at the assembly end; the massager further includes The reciprocating mechanism according to any one of claims 1 to 6, wherein the reciprocating mechanism is assembled in the housing, and a transmission rod in the reciprocating mechanism extends toward the assembly end; The introduction head can be detachably assembled in the introduction head fixing seat. When the introduction head is assembled in the introduction head fixing seat, the introduction head abuts against the transmission rod and compresses the elastic part, while keeping the transmission inclined surface in contact with the pushing part.

8. The massager according to claim 7, characterized in that The import header includes: A connecting tube, which can be connected to the guide head fixing seat; an introduction rod, the introduction rod being disposed in the connecting cylinder, the upper end of the introduction rod being provided with a massage unit, and the lower end of the introduction rod being capable of abutting against the transmission rod sleeve; and An elastic reset member, one end of which is connected to the connecting tube, and the other end of which is connected to the guide rod.

9. The massager according to claim 8, characterized in that The connecting tube is threadedly connected or clamped on the introduction head fixing seat.

10. The massager according to claim 9, characterized in that A limiting portion is provided on the connecting tube, and the limiting portion can limit the connection depth between the connecting tube and the introducing head fixing seat.

11. The massager according to claim 8, characterized in that An assembly platform is detachably provided on the upper end of the introduction rod, and the massage unit is provided on the assembly platform.

12. The massager according to claim 11, characterized in that The massage unit comprises a base and a microstructure arrayed on the surface of the base, wherein the microstructure comprises at least one of a convex point, a microneedle, a microknife, and a microblade.

13. The massager according to claim 11, characterized in that The massage unit is at least one of a nano wafer, a microneedle wafer, a micro wafer, and a micro knife wafer.

14. The massager according to claim 8, characterized in that The connecting tube has a hollow channel, the introduction rod passes through the hollow channel, a first connection portion is provided at one end of the hollow channel, a second connection portion is provided on the introduction rod, the elastic return member is arranged in the hollow channel and sleeved on the outside of the introduction rod, and the two ends of the elastic return member are respectively connected to the first connection portion and the second connection portion.

15. The massager according to claim 14, characterized in that The second connecting portion is located in the hollow channel, and the second connecting portion can slide back and forth relative to the hollow channel.

16. The massager according to claim 14, characterized in that A contact platform is provided at the lower end of the introduction rod. The radius of the circumscribed circle of the contact platform is greater than the inner diameter of the hollow channel. The contact platform can abut against the transmission rod sleeve.

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