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CN-116270190-B - Transmission mechanism and fascia gun

CN116270190BCN 116270190 BCN116270190 BCN 116270190BCN-116270190-B

Abstract

The invention discloses a transmission mechanism and a fascia gun, wherein the transmission mechanism comprises a driving motor, a first rotating piece, a second rotating piece and a linkage shaft, the first rotating piece is provided with a first eccentric shaft, the second rotating piece is provided with a second eccentric shaft, the first rotating piece is in transmission connection with the driving motor, the first rotating piece is provided with a plug hole which is in circumferential limit fit with one end of the linkage shaft, the second rotating piece is provided with a threaded hole which is in threaded fit with the other end of the linkage shaft, and the distance between the bottom of the plug hole and the bottom of the threaded hole is larger than the length of the linkage shaft. According to the invention, the synchronous rotation or asynchronous rotation state switching of the first eccentric shaft and the second eccentric shaft can be realized by changing the rotation direction of the driving motor, so that the massage actions of the massage heads connected to the eccentric shafts through the connecting rod mechanism can be switched, and a user can adjust the two massage heads of the fascia gun to perform synchronous massage or asynchronous massage according to the self requirements, thereby improving the massage experience of the user.

Inventors

  • LI JINGHUA

Assignees

  • 四川千里倍益康医疗科技股份有限公司

Dates

Publication Date
20260508
Application Date
20230424

Claims (17)

  1. 1. The transmission mechanism is characterized by comprising a driving motor (100), a first rotating member (200), a second rotating member (300) and a linkage shaft (400), wherein a first eccentric shaft (210) is arranged on the first rotating member (200), a second eccentric shaft (310) is arranged on the second rotating member (300), the first rotating member (200) is in transmission connection with the driving motor (100), an inserting hole (220) which is in circumferential limit fit with one end of the linkage shaft (400) is formed in the first rotating member (200), a threaded hole (320) which is in threaded fit with the other end of the linkage shaft (400) is formed in the second rotating member (300), the distance between the bottom of the inserting hole (220) and the bottom of the threaded hole (320) is fixedly kept constant, the distance between the bottom of the inserting hole (220) and the bottom of the threaded hole (320) is larger than the length of the linkage shaft (400), and when the linkage shaft (400) is axially translated to be abutted against the bottom of the threaded hole (320), the first eccentric shaft (210) and the second eccentric shaft (310) are axially aligned.
  2. 2. The transmission mechanism of claim 1, wherein the gap between the coupling shaft (400) and the bottom of the plug hole (220) is a first gap when the coupling shaft (400) axially translates to abut against the bottom of the threaded hole (320), the gap between the coupling shaft (400) and the bottom of the threaded hole (320) is a second gap when the coupling shaft (400) axially translates to abut against the bottom of the plug hole (220), and the sum of the widths of the first gap and the second gap is equal to an odd multiple of half the pitch value of the threaded hole (320).
  3. 3. The transmission mechanism according to claim 2, further comprising a buffer block (230) disposed in the insertion hole (220), wherein the buffer block (230) is abutted against the bottom of the insertion hole (220), and wherein the gap between the buffer block (230) and the coupling shaft (400) is a first gap when the coupling shaft (400) axially translates to abut against the bottom of the threaded hole (320).
  4. 4. The transmission mechanism as set forth in claim 2, wherein the bottom of the threaded hole (320) is provided with a tapered surface recessed toward a direction away from the orifice of the threaded hole (320), and the axial gap between the coupling shaft (400) and the edge of the tapered surface is a second gap when the coupling shaft (400) axially translates to abut against the bottom of the insertion hole (220).
  5. 5. The transmission mechanism according to claim 1, wherein the cross section of one end of the coupling shaft (400) which is in limit fit with the first rotating member (200) is a non-circular cross section, and the hole shape of the inserting hole (220) is matched with the cross section shape of the coupling shaft (400).
  6. 6. The transmission mechanism according to claim 5, wherein the cross section of one end of the linkage shaft (400) which is in limit fit with the first rotating member (200) is rectangular, and the inserting hole (220) is a rectangular hole matched with the linkage shaft (400).
  7. 7. The transmission mechanism as claimed in any one of claims 1 to 6, further comprising a transmission member (500) disposed between the drive motor (100) and the first rotating member (200), the transmission member (500) being connected to the output end of the drive motor (100) and being eccentrically connected to the first eccentric shaft (210) on the first rotating member (200).
  8. 8. The transmission mechanism as set forth in claim 7, wherein the transmission member (500) is disposed coaxially with the output end of the driving motor (100), the first rotary member (200) and the second rotary member (300).
  9. 9. The fascia gun comprises a fascia gun shell (600) and massage heads (700) and is characterized by further comprising a transmission mechanism according to claim 7, wherein the transmission mechanism is arranged in the fascia gun shell (600), the first eccentric shaft (210) and the second eccentric shaft (310) are respectively connected with the massage heads (700) extending out of the fascia gun shell (600) through connecting rod mechanisms (800), and the two massage heads (700) are driven by the corresponding connecting rod mechanisms (800) to do synchronous reciprocating linear motion or asynchronous reciprocating linear motion.
  10. 10. The fascia gun according to claim 9, wherein the fascia gun housing (600) is provided with sliding sleeves (610) which are respectively in sliding fit with the massage heads (700), and the link mechanism (800) is connected with the corresponding massage heads (700) after passing through the sliding sleeves (610).
  11. 11. The fascia gun of claim 10, wherein the link mechanism (800) comprises a link (810) and a slide block (820), one end of the link (810) is rotatably connected with the slide block (820), the massage head (700) is detachably connected with the slide block (820), the other ends of the two links (810) in the two link mechanisms (800) are respectively rotatably sleeved on the first eccentric shaft (210) and the second eccentric shaft (310), and the two slide blocks (820) in the two link mechanisms (800) are respectively in sliding fit with the two slide sleeves (610).
  12. 12. The fascia gun according to claim 11, wherein the slider (820) is provided with a mounting hole for mounting the massage head (700), and the massage head (700) is inserted into the mounting hole of the corresponding slider (820) and detachably connected with the slider (820).
  13. 13. The fascia gun of claim 9, further comprising a motor fixing plate (620) fixed in the fascia gun housing (600), wherein the motor fixing plate (620) is provided with a through hole in clearance fit with the output end of the driving motor (100), and the driving motor (100) is detachably mounted on the motor fixing plate (620).
  14. 14. The fascia gun of claim 13, wherein the motor fixing plate (620) is provided with a bearing mounting groove, and the transmission member (500) is in transmission fit with the output end of the driving motor (100) through a transmission bearing (910) fixed in the bearing mounting groove.
  15. 15. The fascia gun of claim 9, further comprising a first stationary bearing (920) and a second stationary bearing (930) secured within the fascia gun housing (600), the first stationary bearing (920) and the second stationary bearing (930) being coaxially aligned, the first stationary bearing (920) being in transition engagement with the first rotatable member (200) and the second stationary bearing (930) being in transition engagement with the second rotatable member (300).
  16. 16. The fascia gun of claim 15, further comprising a first limiting member (240) disposed on the first rotary member (200) and a second limiting member (330) disposed on the second rotary member (300), wherein the first limiting member (240) abuts against the first fixed bearing (920) to form an axial limiting fit, and the second limiting member (330) abuts against the second fixed bearing (930) to form an axial limiting fit.
  17. 17. The fascia gun of claim 16, wherein the first limiting member (240) and the second limiting member (330) are snap springs, and the first rotating member (200) and the second rotating member (300) are provided with limiting grooves which are in clamping fit with the snap springs.

Description

Transmission mechanism and fascia gun Technical Field The invention relates to the technical field of massage equipment, in particular to a transmission mechanism and a fascia gun comprising the transmission mechanism. Background The fascia gun is a massage device which relaxes soft tissues of the body by high-frequency impact of muscles through a massage head on the fascia gun body. The fascia gun is powered by a built-in battery, which generally employs a rechargeable battery to enhance the cruising ability of the fascia gun. The double-end fascia gun adopts two massage heads, so that the massage effect and the massage efficiency of the fascia gun can be improved. The Chinese patent document with the bulletin number of CN215821631U discloses a double-head fascia gun which comprises a shell, wherein a driving mechanism and a power supply structure connected with the driving mechanism are arranged in the shell, one end of the shell forms a handle part, the other end of the shell is provided with two massage heads, the straight line where the central axes of the two massage heads are positioned forms an included angle, the driving mechanism is connected with the massage heads through a power reversing transmission mechanism and can drive the massage heads to axially and synchronously reciprocate or asynchronously reciprocate along the massage heads, and the driving mechanism and the power supply structure are connected with a control circuit. The utility model has the advantages of asynchronous beating, good massage effect and the like. The Chinese patent document with the bulletin number of CN216702926U discloses an unsynchronized double-end fascia gun, which comprises a gun body, a handle, a battery, a motor, a transmission mechanism and a massage head, wherein the handle is arranged on one side of the gun body, the battery is arranged in the handle, a containing cavity is arranged in the gun body, the motor is arranged in the containing cavity and is electrically connected with the battery, the number of the transmission mechanisms is two, the transmission mechanisms are respectively connected with output shafts on two sides of the motor, the number of the massage heads is two, the transmission mechanism comprises an eccentric wheel, a rotating shaft and a transmission rod, the eccentric wheel is sleeved on the output shaft of the motor, the rotating shaft is arranged on the eccentric wheel, the two transmission mechanisms drive the two massage heads to reciprocate in a crossed manner, the transmission rod is sleeved on the rotating shaft, and the massage heads are connected with the transmission rod. The battery is arranged in the handle, the motor is provided with the accommodating cavity, the size of the handle is reduced, the handle is convenient for a user to hold, the two eccentric wheels are arranged on the motor output shaft to adjust the angle positions, the two massage heads do not synchronously move, the massage effect is achieved, and the two massage heads are arranged, so that the massage efficiency can be improved. The utility model discloses a double-head fascia gun, which relates to the technical field of fascia relaxing equipment, and comprises a fascia gun and a handle vertically connected with the fascia gun, wherein a motor powered by a battery is arranged in the handle, two transmission shafts capable of reciprocating are slidably arranged on the fascia gun, detachable massage heads are arranged on the two transmission shafts, a transmission mechanism in transmission connection with the output end of the motor is arranged in the fascia gun, the motor can make the two transmission shafts do crossed reciprocating motion through the transmission mechanism, the two transmission shafts are driven by the same motor to do crossed reciprocating motion, so that the two massage heads are driven to achieve a striking or knocking effect, the two massage heads are utilized to massage the same large muscle group, the massaging effect is enhanced by one time, and the muscle recovery time is further shortened. The above patent documents disclose a technical scheme that two driving parts are used for driving two massage heads to move respectively to achieve synchronous striking or asynchronous striking, or a technical scheme that one driving part is used for driving two massage heads to move alternately to achieve asynchronous striking, but the whole driving mechanism is complex in structure and unfavorable for controlling the production cost when the two driving parts are used, and only one driving part can only perform single-action striking work, so that the switching between synchronous striking and asynchronous striking of the massage heads cannot be achieved. Disclosure of Invention The invention aims to solve the technical problem of providing a transmission mechanism which has a simple structure and is convenient to switch transmission modes. The technical scheme includes that the transmission