CN115531154A

CN115531154A - Method for applying spiral spring to massage machine core

Info

Publication number: CN115531154A
Application number: CN202211228867.3A
Authority: CN
Inventors: 戴龙飞; 李桥海
Original assignee: Angelino Electronic Technology Co ltd
Current assignee: Angelino Electronic Technology Co ltd
Priority date: 2022-10-08
Filing date: 2022-10-08
Publication date: 2022-12-30

Abstract

The invention provides a method for applying a spiral spring to a massage movement, which comprises the following steps: assembling: a1: locking the spiral spring and the massage head to form a linkage end; a2: sleeving the spiral spring on the driving shaft, and matching the massage head on the driving shaft in a threaded manner; a3: the spiral spring is encircled on a convex ring at the bottom of the massage machine core, which is positioned at the bottom of the driving shaft, and an adjusting end is formed; and (3) adjusting: b1: controlling the massage head to contract; the driving shaft is driven to rotate reversely to enable the spiral spring to rotate reversely so that the adjusting end of the spiral spring is tightly held on the convex ring at the bottom, and the spiral spring exerts a braking effect on the massage head so that the massage head moves from the top end of the driving shaft to the bottom end of the driving shaft; b2: controlling the massage head to extend out; the driving shaft is driven to rotate positively by the helical spring; the adjusting end exerts a braking effect on the massage head so that the massage head moves from the bottom end of the driving shaft to the top end of the driving shaft to reset; and the spiral spring is positively rotated to gradually loosen the space between the adjusting end and the convex ring at the bottom so that the massage head synchronously rotates in situ along with the driving shaft.

Description

Method for applying spiral spring to massage machine core

Technical Field

The invention relates to the field of massage equipment, in particular to a method for applying a spiral spring to a massage machine core.

Background

With the continuous improvement of living standard of people, the pursuit of life of people is gradually shifted from physical life to mental life. The massage chair is a popular household and office furniture at present, when people use the chair for a long time, the people are easy to fatigue due to the fact that sitting postures are always fixed, and simultaneously feel ache and lack of strength; at this time, the massage function of the massage chair can massage and relax the body.

The massage chair on the existing market is usually provided with a massage machine core with a massage head in a chair back, and a user can relax the back after leaning on the chair by controlling the massage machine core to work; however, the existing massage chair has the following problems: the massage head of the massage seat massage movement protrudes out of the seat back, and a user can always feel the massage head as long as the user walks on the seat back; although the effect of massaging the back can be achieved, the back feels aching and uncomfortable after long-time leaning on the chair back; this violates the design philosophy of making the user comfortable. Moreover, the massage head is exposed outside the chair back very obviously, which causes the chair back to be unattractive. In summary, the method comprises the following steps: when the existing massage chair does not need massage, the massage head still exists on the chair back, so that the sitting feeling of the chair is very uncomfortable, and the chair cannot be used as a common chair; and is also very unattractive in structure.

Therefore, the massage heads of the existing massage machine cores can be telescopically adjusted, and the massage heads can be selectively controlled to extend out for use or retract and hide according to the requirements of users. The utility model discloses a massage head structure and a neck massager, such as CN201921526959.3, which comprises a massage head body, a main shaft, an elastic element, a first gear device, a rotating element and a driving element, wherein the first gear device comprises a first rotating shaft and a first gear fixedly sleeved on the outer side of the first rotating shaft; the main shaft is slidably arranged in the first rotating shaft in a penetrating way, the first end part of the main shaft is fixedly connected with the massage head body, and the elastic piece is sleeved outside the main shaft and is connected between the main shaft and the massage head body; the rotating piece is arranged in the first rotating shaft in a sliding fit mode and connected between the driving piece and the second end portion of the main shaft; the driving part is pushed to enable the rotating part to be matched in the first rotating shaft in a sliding mode, and the main shaft is driven to slide up and down in the first rotating shaft, so that the massage head body extends out or contracts. Although the massage head structure can realize the telescopic effect of the massage head, the massage head can be massaged only by matching a plurality of components and manually adjusting a driving piece by a user to control the telescopic action of the massage head and restarting the machine; undoubtedly, the structure is very complicated, and the manufacturing cost is high; and the operation is not simple enough.

In order to solve the above problems, a massage machine core needs to be designed, so that the massage machine core has a simple structure and can conveniently adjust the stretching action of the massage head.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a method for applying a spiral spring to a massage machine core; the spiral spring is sleeved on the driving shaft, so that the spiral spring is positioned between the massage machine core and the massage head; the self characteristics of reverse rotation tightening and forward rotation loosening of the adjusting end of the spiral spring are utilized, so that the massage head can be selectively braked; when the massage head is adjusted, the massage head can be controlled to extend out or contract only by controlling the driving shaft to rotate forwards or backwards; the operation is very convenient and fast, the device is simple and reliable, and the structural design is ingenious.

The technical scheme of the invention is realized as follows:

a method of applying a coil spring to a massage cartridge, comprising: assembling: a1: one end of the spiral spring and the massage head are locked to form a linkage end; a2: the spiral spring is sleeved on a driving shaft of the massage machine core, and the massage head is matched with the driving shaft in a threaded manner; the spiral spring is clamped between the massage machine core and the massage head; a3: the other end of the spiral spring is encircled on a convex ring at the bottom of the massage machine core, which is positioned at the bottom of the driving shaft, and an adjusting end is formed; an adjusting step: b1: controlling the massage head to contract; the driving shaft is driven to rotate reversely, the driving shaft drives the massage head to act on the spiral spring to rotate reversely, so that the adjusting end of the spiral spring is tightly held on the convex ring at the bottom, and the spiral spring exerts a braking action on the massage head, so that the massage head moves from the top end of the driving shaft to the bottom end of the driving shaft; b2: controlling the massage head to extend out; the driving shaft is driven to rotate positively, and the driving shaft drives the massage head to act on the helical spring to rotate positively; the adjusting end continuously exerts a braking effect on the massage head so that the massage head moves from the bottom end of the driving shaft to the top end of the driving shaft to reset; and the spiral spring is positively rotated to gradually loosen the space between the adjusting end and the convex ring at the bottom so as to stop braking the massage head, so that the massage head can synchronously rotate in situ along with the driving shaft after being reset to the top end of the driving shaft.

Preferably, in step B1, the coil spring is configured such that during the reverse rotation, the adjustment end is held tightly against the connection convex ring and generates a frictional braking force greater than a maximum static friction force between the massage head and the drive shaft to brake the massage head. The self-characteristic of tightening when the spiral spring reversely rotates is utilized, and the friction braking force between the adjusting end and the bottom convex ring is larger than the maximum static friction force between the massage head and the driving shaft, so that the massage head rotates relative to the driving shaft.

Preferably, in step B2, when the massage head is located at the top end of the driving shaft and the driving shaft is rotating positively, the adjusting end of the coil spring is loosened relative to the bottom convex ring and the frictional braking force between the adjusting end and the bottom convex ring is smaller than the maximum static friction force between the massage head and the driving shaft, and the massage head rotates synchronously with the driving shaft. When the massage head is extended out, the force applied to the massage head is less than the maximum static friction force between the massage head and the driving shaft, so that the massage head and the driving shaft synchronously move.

Preferably, in step B1, the massage head is contracted to compress the coil spring to place the coil spring in a compressed state, and both ends of the coil spring are pressed against the massage movement and the massage head, respectively. When the massage head is in a contraction state, the spiral spring is in a compression state, and two ends of the spiral spring respectively act on the massage head and the massage machine core in an extrusion manner; when the driving shaft rotates positively to cause the massage head to rotate and reset, the spiral spring can apply additional friction acting force to the massage head; so that the massage head can still receive a braking force for rotating it relative to the drive shaft, although the adjustment end will gradually loosen with the bottom convex ring.

Preferably, the massage head is provided with a massage part and a connecting column sleeve; in the step A1, the driving shaft is arranged in the connecting column sleeve in a penetrating way; the linkage end of the spiral spring is sleeved and locked on the connecting column sleeve. The connecting column sleeve is arranged, so that the connecting column sleeve is conveniently connected with the driving shaft and the spiral spring.

Preferably, the massage part has a massage protrusion protruding from a tip end; when the massage head extends out, the massage bulge protrudes out of the top end of the driving shaft; when the massage head is contracted, the massage bulge does not exceed the top end of the driving shaft. When the massage head extends out, the massage head rotates along with the driving shaft, and the massage bulge can massage the user; and the massage head is contracted, the massage bulge does not exceed the top end of the driving shaft, so that a user can not feel the existence of the massage head.

Preferably, the bottom convex ring is hollow, and the diameter of the bottom convex ring is larger than that of the connecting column sleeve; a circle of limiting ring is arranged in the bottom convex ring, and when the massage head contracts, the massage head moves to the connecting column to be sleeved in the bottom convex ring and is abutted against the limiting ring up and down. Thereby, when the massage head is contracted, the limit ring can limit the massage head.

Preferably, the bottom convex ring is made of plastic, and the connecting column sleeve is made of plastic. The spiral spring is made of metal, so the bottom convex ring and the connecting column sleeve are made of plastic, and noise is not generated when the metal and the plastic rub each other.

Preferably, the driving shaft is provided with an external thread; a through hole penetrating along the axial direction of the connecting column sleeve is formed in the connecting column sleeve, and an internal thread is arranged in the through hole; the driving shaft is penetrated through the bottom end of the connecting column sleeve and is connected in the through hole in a threaded manner; the top end of the massage part is correspondingly concavely provided with a sinking groove which is expanded relative to the through hole; a cap body connected to the top end of the driving shaft is arranged in the sunken groove, and the cap body is configured to limit the massage head to be separated from the driving shaft. A cap body is further arranged to limit the massage head to be separated from the driving shaft.

Preferably, the cap body is detachably connected with the driving shaft by adopting a screw; in the step A2, after the massage head is connected and matched with the driving shaft, the cap body is embedded into the sunken groove and connected to the top end of the driving shaft. The assembly is convenient, the massage head is connected with the driving shaft in advance, and then the cap body is further connected.

The design starting point, the idea and the beneficial effects of the invention adopting the technical scheme are as follows:

the invention relates to a method for applying a spiral spring to a massage machine core, which is characterized in that the spiral spring is arranged between a massage head and a bottom convex ring of the massage machine core, the linkage end of the spiral spring is in locking linkage with the massage head, and the adjusting end of the spiral spring is encircled on the bottom convex ring; by utilizing the self characteristics of the regulating end of the spiral spring for tightening in the reverse rotation and loosening in the forward rotation, when the driving shaft drives the spiral spring to rotate in the reverse rotation, the regulating end of the spiral spring is tightly held on the convex ring at the bottom and provides a friction braking force which is greater than the maximum static friction force between the massage head and the driving shaft, and the spiral spring can play a role in braking the massage head; so that the massage head will move from the top end of the driving shaft to the bottom end of the driving shaft. When the massage head is reset, only the driving shaft needs to be driven to rotate positively to act on the positive rotation of the spiral spring, and friction braking force still exists between the adjusting end of the spiral spring and the convex ring at the bottom, so that the friction force cannot disappear suddenly, and the spiral spring can continuously exert braking effect on the massage head to enable the massage head to move and extend out along the driving shaft; in the process, as the spiral spring is positively rotated, the friction braking force between the adjusting end and the bottom convex ring is gradually reduced and is smaller than the maximum static friction force between the massage head and the driving shaft, so that the massage head can synchronously rotate in situ along with the driving shaft after being reset to the top end of the driving shaft. Then, the helical spring is utilized, and the massage head can be controlled to extend out or contract only by controlling the driving shaft to rotate along different directions; the operation is very convenient and fast, and the device is simple and reliable, and the structural design is ingenious.

Drawings

Fig. 1 is a schematic perspective view of a massage movement according to an embodiment of the present invention;

FIG. 2 is a perspective view of the massage head of the present invention with its extended portion;

FIG. 3 is a schematic perspective view of the connection of the massage head, the coil spring and the driving shaft according to the embodiment of the present invention;

FIG. 4 is a schematic perspective view of a massage head and a coil spring according to an embodiment of the present invention;

FIG. 5 is a schematic view of the forward and reverse directions of the coil spring according to the embodiment of the present invention;

fig. 6 is a schematic perspective view of the massage head of the embodiment of the present invention when it is retracted.

The figures are numbered: a massage machine core 1; a drive shaft 2; a massage head 3; a massage section 3a; a connecting column sleeve 3b; a coil spring 4; a linkage end 4a; an adjustment end 4b; an external thread 5; a perforation 6; an internal thread 7; a sink tank 8; a cap body 9; a bottom bulge loop 10; a massage protrusion 11; a stop collar 12.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, the term "at least one" means one or more than one unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The specific embodiment of the invention is as follows:

as shown in fig. 1-6, the present invention provides a method for applying a coil spring to a massage machine core, wherein a driving shaft 2 is disposed on the massage machine core 1, and the massage machine core 1 can drive the driving shaft 2 to rotate circumferentially around any direction; the drive shaft 2 is connected with a massage head 3, and the massage head 3 is matched with the drive shaft 2 by screw thread connection, so that the massage head 3 can rotate and move relative to the drive shaft 2. And through set up coil spring 4 between massage head 3 and massage core 1 for under coil spring 4's effect, only need control drive shaft 2 rotation, can control massage head 3 shrink and stretch out, thereby make massage head 3 can switch between user state and hidden state.

The specific assembly steps are as follows: as shown in fig. 1-5, the massage head 3 has a massage part 3a at the top and a connection column sleeve 3b at the bottom; one end of the spiral spring 4 is sleeved on the connecting column sleeve 3b and locked with the connecting column sleeve 3b to form a linkage end 4a; so that the coil spring 4 can follow the massaging head 3 for rotational movement. The driving shaft 2 is provided with an external thread 5, correspondingly, a through hole 6 penetrating along the axial direction of the connecting column sleeve 3b is arranged in the connecting column sleeve, and an internal thread 7 is arranged in the through hole 6; when the massage head 3 is connected with the driving shaft 2, the spiral spring 4 is sleeved on the driving shaft 2, and then the driving shaft 2 is penetrated through the bottom end of the connecting column sleeve 3b and is connected in the through hole 6 by screw thread; a sunken groove 8 which is expanded outwards relative to the through hole 6 is concavely arranged at the top end of the massage part 3a, and the top end of the driving shaft 2 can penetrate out of the sunken groove 8; a cap body 9 detachably connected to the top end of the driving shaft 2 is also arranged in the sunken groove 8, and the cap body 9 is configured to limit the massage head 3 to be separated from the driving shaft 2; the method specifically comprises the following steps: the cap body 9 is detachably connected with the driving shaft 2 by screws; then after the massage head 3 is in threaded connection and matching with the driving shaft 2, the cap body 9 is embedded into the sunken groove 8 and is connected to the top end of the driving shaft 2 through a screw; the cap body 9 can be vertically abutted against the internal thread 7 so as to limit the massage head 3 from falling off the driving shaft 2; so that the massage head 3 can move only within the length range of the driving shaft 2; and the spiral spring 3a is always clamped between the massage movement 1 and the massage head 3.

In addition, the massage part 3a is provided with a massage bulge 11 protruding out of the top end thereof, and in the use state when the massage head 3 is extended out, the massage bulge 11 will protrude out of the top end of the driving shaft 2, so that in the use state, the massage bulge 11 can perform a massage effect on a user; when the massage head is contracted, the massage protrusion 11 does not protrude from the top end of the drive shaft 2, so that the user cannot feel the existence of the massage head 3. Further, the following steps are carried out: as shown in fig. 1 to 4, a protruded bottom convex ring 10 is provided at the root of the driving shaft 2 of the massage movement 1, and the bottom end of the coil spring 4 is looped around the bottom convex ring 10 and forms an adjusting end 4b. The massage head 3 and the bottom convex ring 10 are made of plastic, and the spiral spring 4 is made of metal, so that noise is not generated when the metal and the plastic are rubbed with each other.

As shown in fig. 5, the coil spring 4 has two opposite winding directions of forward rotation and reverse rotation; in the present invention, the coil spring 4 is configured such that: when the spiral spring 4 reversely rotates relative to the driving shaft 2, the adjusting end 4b of the spiral spring 4 will gradually hug the bottom convex ring 10, so that the friction force between the adjusting end 4b and the bottom convex ring 10 is gradually increased, and the friction braking force between the adjusting end 4b of the spiral spring 4 and the bottom convex ring 10 can play a braking role on the massage head 3 at the moment. In contrast, when the coil spring 4 is rotated positively relative to the driving shaft 2, the adjusting end 4b of the coil spring 4 will be gradually loosened relative to the bottom convex ring 10, so that the friction force between the two is gradually reduced, and the coil spring 4 will not exert a braking effect on the massage head 3. The phenomenon that the adjusting end 4b of the coil spring 4 is respectively tightly held or loosened with respect to the bottom convex ring 10 when the coil spring 4 rotates in different directions is a characteristic of the coil spring 4 itself, and is a prior art.

Still further, similar to the structural principle of the screw rod nut, a maximum static friction force with a constant magnitude exists between the massage head 3 and the driving shaft 2, and when the massage head 3 is acted by an external force greater than the maximum static friction force, the massage head 3 rotates relative to the driving shaft 2 to move along the driving shaft 2; when the massage head 3 is acted by an external force smaller than the maximum static friction force, the massage head 3 does not move relative to the driving shaft 2, and the two move synchronously.

Then the adjustment steps of the massage head 3 are as follows:

as shown in fig. 2, 5 and 6, when the massage head 3 needs to be controlled to contract, the driving shaft 2 is driven to rotate reversely, and the driving shaft 2 drives the massage head 3 to rotate, so that the spiral spring 4 is acted to rotate reversely; the adjusting end 4b will then hug the bottom convex ring 10, and the helical spring 4 is configured such that a frictional braking force greater than the above-mentioned maximum static friction force will be generated between the adjusting end 4b and the bottom convex ring 10, so as to exert a braking action on the massaging head 3; so that the massage head 3 can perform relative rotation movement with respect to the driving shaft 2, and then the massage head 3 will move from the top end of the driving shaft 2 to the bottom end of the driving shaft 2. In addition, the bottom convex ring 10 is hollow, and the diameter of the bottom convex ring 10 is larger than the diameter of the driving shaft 2 and the diameter of the connecting column sleeve 3b, so that the bottom end of the connecting column sleeve 3b can penetrate through the bottom convex ring 10; a circle of limiting rings 12 are also arranged in the bottom convex ring 10, when the massage head 3 moves to the bottom of the driving shaft 2 to be contracted, the bottom end of the connecting column sleeve 3b is pressed against the limiting rings 12 up and down, so that the massage head 3 is limited to move continuously; so that the massage head 3 stays at the bottom end of the drive shaft 2, keeping a hidden state at the time of contraction.

On the contrary, when the massage head 3 needs to be controlled to return from the contracted state and extend out again, the driving shaft 2 is driven to rotate positively, so that the driving shaft 2 acts on the massage head 3 to drive the spiral spring 4 to rotate positively; at the initial stage of the reset, a friction braking force still exists between the adjusting end 4b of the spiral spring 4 and the bottom convex ring 10, and the friction force does not disappear suddenly and only decreases gradually; then the adjusting end 4b of the coil spring 4 can still continue to exert the braking effect on the massage head 3, and then the massage head 3 can still rotate relative to the driving shaft 2, so that the massage head 3 moves towards the top end of the driving shaft 2 to be reset. In the resetting process, because the spiral spring 4 is positively rotated, the adjusting end 4b is gradually loosened relative to the convex ring 10 at the bottom, and the friction force between the adjusting end and the convex ring is gradually reduced, so that the braking effect of the spiral spring 4 on the massage head 3 is gradually weakened; however, in the process, because the spiral spring 4 is compressed before, two ends of the spiral spring 4 respectively act on the massage movement 1 and the massage head 3 in a squeezing way; when the driving shaft 2 is rotated positively to make the massage head 3 rotate and reset towards the top end, the extrusion elastic force of the spiral spring 4 can apply additional friction acting force to the massage head 3; so that the massage head 3 can receive a braking force sufficient to rotate it relative to the drive shaft 2, although the adjustment end 4b will gradually relax from the bottom convex ring 10.

Until the massage head 3 is reset to the top end of the driving shaft 2, the friction force between the adjusting end 4b and the bottom convex ring 10 is very small when the spiral spring 4 rotates positively, and is far smaller than the maximum static friction force; so that the adjustment end 4b will no longer brake the massage head 3 and then, when the drive shaft 2 is controlled to continue to rotate positively at this time, the massage head 3 will follow the drive shaft 2 to rotate synchronously in situ, so that the massage protrusions 11 can follow the rotation of the massage head 3 to perform a massage action on the user.

In summary, the present invention utilizes the characteristics of the coil spring 4 by disposing the coil spring 4 between the massage head 3 and the bottom convex ring 10 of the massage movement 1, so that the coil spring 4 can selectively exert a braking effect on the massage head 3 when the driving shaft 2 rotates forward or backward. Then the extension or contraction of the massage head 3 can be conveniently adjusted only by controlling the rotation direction of the driving shaft 2; the operation is very convenient and fast; the device is simple and reliable, and the structural design is ingenious.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Claims

1. A method of applying a coil spring to a massage movement, comprising:

assembling:

a1: one end of the spiral spring and the massage head are locked to form a linkage end;

a2: the spiral spring is sleeved on a driving shaft of the massage machine core, and the massage head is matched with the driving shaft in a threaded manner; the spiral spring is clamped between the massage movement and the massage head;

a3: the other end of the spiral spring is encircled on a convex ring at the bottom of the massage machine core, which is positioned at the bottom of the driving shaft, and an adjusting end is formed;

and (3) adjusting:

b1: controlling the massage head to contract; the driving shaft is driven to rotate reversely, the driving shaft drives the massage head to act on the spiral spring to rotate reversely, so that the adjusting end of the spiral spring is tightly held on the convex ring at the bottom, and the spiral spring exerts a braking action on the massage head to enable the massage head to move from the top end of the driving shaft to the bottom end of the driving shaft;

b2: controlling the massage head to extend out; the driving shaft is driven to rotate positively, and the driving shaft drives the massage head to act on the spiral spring to rotate positively; the adjusting end continuously exerts a braking effect on the massage head so that the massage head moves from the bottom end of the driving shaft to the top end of the driving shaft to reset; and the spiral spring is positively rotated to gradually loosen the space between the adjusting end and the convex ring at the bottom so as to stop braking the massage head, so that the massage head can synchronously rotate in situ along with the driving shaft after being reset to the top end of the driving shaft.

2. A method of applying a coil spring to a massage movement according to claim 1, wherein: in step B1, the spiral spring is configured to be clamped on the connecting convex ring during the reverse rotation process, and generates a friction braking force which is larger than the maximum static friction force between the massage head and the driving shaft so as to brake the massage head.

3. A method of applying a coil spring to a massage movement according to claim 2, characterized in that: in step B2, when the massage head is positioned at the top end of the driving shaft and the driving shaft rotates positively, the adjusting end of the spiral spring is loosened relative to the convex ring at the bottom, the friction braking force between the adjusting end and the convex ring at the bottom is smaller than the maximum static friction force between the massage head and the driving shaft, and the massage head rotates synchronously along with the driving shaft.

4. A method of applying a coil spring to a massage movement according to claim 1, characterized in that: in step B1, the massage head contracts to extrude the spiral spring to enable the spiral spring to be in a compressed state, and two ends of the spiral spring respectively extrude and act on the massage movement and the massage head.

5. A method of applying a coil spring to a massage movement according to claim 1, characterized in that: the massage head is provided with a massage part and a connecting column sleeve; in the step A1, the driving shaft is arranged in the connecting column sleeve in a penetrating way; the linkage end of the spiral spring is sleeved and locked on the connecting column sleeve.

6. A method of applying a coil spring to a massage movement according to claim 5, wherein: the massage part is provided with a massage bulge protruding out of the top end; when the massage head extends out, the massage bulge protrudes out of the top end of the driving shaft; when the massage head is contracted, the massage bulge does not exceed the top end of the driving shaft.

7. A method of applying a coil spring to a massage movement according to claim 5, wherein: the bottom convex ring is hollow, and the diameter of the bottom convex ring is larger than that of the connecting column sleeve; a circle of limiting ring is arranged in the bottom convex ring, and when the massage head contracts, the massage head moves to the connecting column to be sleeved in the bottom convex ring and is abutted against the limiting ring up and down.

8. A method of applying a coil spring to a massage movement according to claim 5, wherein: the bottom convex ring is made of plastic, and the connecting column sleeve is made of plastic.

9. A method of applying a coil spring to a massage movement according to claim 5, characterized in that: the driving shaft is provided with an external thread; a through hole penetrating along the axial direction of the connecting column sleeve is formed in the connecting column sleeve, and an internal thread is arranged in the through hole; the driving shaft is penetrated through the bottom end of the connecting column sleeve and is connected in the through hole in a threaded manner; the top end of the massage part is correspondingly concavely provided with a sinking groove which is expanded relative to the through hole; a cap body connected to the top end of the driving shaft is arranged in the sunken groove, and the cap body is configured to limit the massage head to be separated from the driving shaft.

10. A method of applying a coil spring to a massage movement according to claim 9, wherein: the cap body is detachably connected with the driving shaft by screws; in the step A2, after the massage head is connected and matched with the driving shaft, the cap body is embedded into the sunken groove and connected to the top end of the driving shaft.