Rotary telescopic mechanism

Abstract

The utility model discloses a rotary telescopic mechanism which comprises a shell, a driving assembly and a movable assembly, and the driving assembly comprises a power element and an eccentric wheel arranged on the power element; the movable assembly comprises a connecting cylinder and a rotating cylinder rotatably arranged on the connecting cylinder, one end of the rotating cylinder is provided with a pivoting shaft, and the pivoting shaft is assembled and connected with the connecting cylinder; a transmission part is hinged to the eccentric wheel, the other end of the transmission part is hinged to the connecting cylinder, and the power element drives the movable assembly to reciprocate along the inner cavity of the shell through the eccentric wheel and the transmission part. The inner wall of the shell is provided with a guide device used for enabling the rotating cylinder to rotate with the pivot joint shaft as a rotating center shaft, and the periphery of the rotating cylinder is provided with a first spiral groove and a second spiral groove which are matched with the guide device. According to the utility model, the power element of the driving assembly drives the transmission piece and the guide device through the eccentric wheel, so that the massage head rotates while reciprocating, and various massage actions are met.

Description

Technical field:

[0001] The utility model relates to the technical field of telescopic transmission machinery, in particular to a rotary telescopic mechanism. Background technology:

[0002] Massage devices are primarily used to treat muscle tension and fatigue by relaxing the body's soft tissues through high-frequency impacts.

[0003] In principle, most massage devices mainly use a specially designed high-speed motor inside to drive the massage head through a special transmission mechanism, moving it back and forth at a high strike rate per minute. The force exerted on the tissue through high-frequency vibration transmits the pressure layer by layer to the fat, superficial fascia, deep fascia, and muscles.

[0004] However, currently, massage equipment on the market generally chooses to use a bevel gear set as the transmission mechanism between the motor and the massage head, such as: the utility model patent application with patent announcement number CN219558030U discloses a multi-head vibration massage fascia gun, which includes: a crank shaft, the crank shaft includes at least two monomer crank bodies connected end to end, one end of one of the monomer crank bodies is provided with an integrated main shaft, and a universal joint is connected between two adjacent monomer crank bodies, and the middle part of the monomer crank body is sleeved with a rotating ring, and the lower end of the rotating ring is fixedly connected to a connecting rod, and the lower end of the connecting rod is rotatably mounted with a vibration rod through a second rotating pin, and the lower end of the vibration rod is fixedly connected to a vibration head. This scheme achieves the purpose of massaging different positions and avoids the situation where each vibration head must massage according to the set position.

[0005] However, this existing massage fascia gun has the following shortcomings:

[0006] This technical solution uses multiple single crank bodies for transmission, each of which is provided with a vibration head, which is driven by a driving structure. This increases the number of transmission levels from the driving structure to the vibration head, resulting in low transmission efficiency and easy wear of the universal joints between two adjacent single crank bodies. In addition, the vibration head can only be driven by the single crank body to perform reciprocating telescopic motion, but cannot satisfy the vibration head to perform rotational motion while telescoping, and the transmission direction between the driving structure and the vibration head needs to be changed through a bevel gear set. Such a structure occupies a large space, which increases the overall volume and is not very portable.

[0007] In view of this, the inventor proposes the following technical solution. Utility model content:

[0008] The utility model aims to overcome the deficiencies of the prior art and provide a rotating telescopic mechanism.

[0009] In order to solve the above technical problems, the utility model adopts the following technical scheme: the rotary telescopic machine includes a shell, a driving assembly installed in the shell and a movable assembly driven by the driving assembly, the driving assembly includes a power element and an eccentric wheel arranged on the power element; the movable assembly includes a connecting cylinder and a rotating cylinder rotatably arranged on the connecting cylinder, one end of the rotating cylinder is provided with a pivot shaft, and the pivot shaft is assembled and connected with the connecting cylinder; a transmission member is hinged on the eccentric wheel, and the other end of the transmission member is hinged to the connecting cylinder, the power element drives the movable assembly to reciprocate along the inner cavity of the shell through the eccentric wheel and the transmission member; the inner wall of the shell is provided with a guide device for making the rotating cylinder rotate with the pivot shaft as the rotation center axis, and the rotating cylinder is respectively provided with a first spiral groove and a second spiral groove matching the guide device.

[0010] Furthermore, in the above technical solution, the guiding device includes a first ball bracket and a second ball bracket respectively arranged on the inner wall of the shell, and a first ball and a second ball respectively installed in the first ball bracket and the second ball bracket.

[0011] Furthermore, in the above technical solution, a bearing is provided in the connecting cylinder, and the pivot shaft is assembled in the bearing in an interference fit manner.

[0012] Furthermore, in the above technical solution, a bearing is sleeved on the pivot shaft, and an annular groove is formed on the end of the pivot shaft, the connecting tube is provided with a through hole for positioning the bearing, and a positioning piece for axially limiting the bearing is provided on the connecting tube. The connecting tube is also provided with a positioning cover for covering the end of the pivot shaft and limiting its axial position, and a protrusion matching the annular groove is protruded on the positioning cover.

[0013] Furthermore, in the above technical solution, a limiting column is protruded from the front end of the rotating cylinder, and a limiting hole is provided on the connecting cylinder. The limiting hole is bracket-shaped, and the limiting column is inserted into the limiting hole to limit the circumferential position of the rotating cylinder.

[0014] Furthermore, in the above technical solution, the transmission member is respectively formed with a first through hole and a second through hole, and correspondingly, the connecting tube is formed with a first hinge portion matching the first through hole, and the eccentric wheel is formed with a second hinge portion, and the transmission member is connected to the connecting tube by a first pin passing through the first hinge portion and the first through hole, and the transmission member is connected to the eccentric wheel by a second pin inserted into the second hinge portion and the second through hole.

[0015] Furthermore, in the above technical solution, the inner wall of the shell is respectively provided with a first guide rail and a second guide rail, and correspondingly, the two sides of the connecting tube are respectively provided with a first slider and a second slider for matching with the first guide rail and the second guide rail and guiding the connecting tube, and the cross-sectional shape of the first slider and the second slider are both T-shaped.

[0016] Furthermore, in the above technical solution, the rotating cylinder partially extends out of the shell, and a stepped groove for limiting the rotating cylinder is formed around the rotating cylinder. Correspondingly, a blocking portion for pressing and limiting the stepped groove is formed on the shell.

[0017] Furthermore, in the above technical solution, the rotating cylinder is formed with an inner cavity, a massage head is arranged in the inner cavity, and the massage head is partially exposed outside the rotating cylinder.

[0018] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art: in the utility model, the power element of the driving assembly drives the transmission member through the eccentric wheel, and the transmission member further drives the movable assembly to reciprocate. At the same time, the guide device acts between the inner wall of the shell and the rotating cylinder, so that the rotating cylinder rotates with the pivot axis as the rotation center axis, and the massage head is set on the rotating cylinder, so that the massage head can rotate while reciprocating, satisfying various massage actions. In addition, compared with the existing structure, the utility model avoids the use of bevel gear sets through the articulation of the eccentric wheel and the transmission member, reduces the transmission level, improves the transmission efficiency, and reduces the overall volume, enhancing the portability of the product. Description of the drawings:

[0019] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0020] Figure 2 It is an exploded schematic diagram of the utility model;

[0021] Figure 3 yes Figure 2 A magnified view at point A;

[0022] Figure 4 yes Figure 2 Enlarged view at B;

[0023] Figure 5 It is a schematic diagram of the assembly of the movable component and the bearing in the utility model. Specific implementation method:

[0024] The utility model is further described below in conjunction with specific embodiments and drawings.

[0025] See Figures 1 to 5As shown, a rotating telescopic mechanism is shown. In the first embodiment of the present utility model, the mechanism comprises a housing 1 , a driving assembly 2 installed in the housing 1 , and a movable assembly 3 driven by the driving assembly 2 .

[0026] The driving assembly 2 includes a power element 21 and an eccentric wheel 22 arranged on the power element 21; the movable assembly 3 includes a connecting cylinder 31 and a rotating cylinder 32 rotatably arranged on the connecting cylinder 31, and a pivot shaft 320 is arranged at one end of the rotating cylinder 32, and the pivot shaft 320 is assembled and connected with the connecting cylinder 31; a transmission member 4 is hinged on the eccentric wheel 22, and the other end of the transmission member 4 is hinged to the connecting cylinder 31, and the power element 21 drives the movable assembly 3 to reciprocate along the inner cavity of the shell 1 through the eccentric wheel 22 and the transmission member 4; in this embodiment, preferably, the power element 21 is a gear box.

[0027] The inner wall of the housing 1 is provided with a guide device 5 for causing the rotating cylinder 32 to rotate about the pivot shaft 320 as the rotation center axis. The rotating cylinder 32 is provided with a first spiral groove 51 and a second spiral groove 52 matching the guide device 5 .

[0028] In this embodiment, the eccentric wheel 22 and the transmission member 4 are used for transmission. Specifically, the power element 21 of the driving assembly 2 drives the eccentric wheel 22 to rotate and drives the transmission member 4, and the transmission member 4 further drives the movable assembly 3 to reciprocate. At the same time, the guide device 5 acts between the inner wall of the housing 1 and the first spiral groove 51 and the second spiral groove 52 on the rotating cylinder 32, so that the rotating cylinder 32 rotates with the pivot shaft 320 as the rotation center axis, and the massage head 9 is set on the rotating cylinder 32, so that the massage head 9 can rotate while reciprocating, meeting multiple modes.

[0029] The guide device 5 includes a first ball bracket 11 and a second ball bracket 12 respectively arranged on the inner wall of the housing 1, and a first ball 53 and a second ball 54 respectively installed in the first ball bracket 11 and the second ball bracket 12. The first ball bracket 11 and the second ball bracket 12 are respectively located on both sides of the rotating cylinder 32, and the arrangement of the two sides can make the rotating cylinder 32 more uniformly stressed when rotating; the first ball 53 and the second ball 54 are respectively fixed to the housing 1 through the first ball bracket 11 and the second ball bracket 12, and when the rotating cylinder 32 is pushed by the connecting cylinder 31, the rotating cylinder 32 realizes the lifting and rotating functions under the action of the first ball 53 and the second ball 54 on both sides.

[0030] See Figure 1As shown, the connecting cylinder 31 is provided with a bearing 6, and the pivot shaft 320 is assembled in the bearing 6 in an interference fit manner. In this embodiment, the bearing 6 is integrally fixedly provided on the connecting cylinder 31, and the rotating cylinder 32 is pivotally connected to the connecting cylinder 31 in an interference fit manner through the pivot shaft 320, so that when the rotating cylinder 32 rotates, the connecting cylinder 31 does not rotate, but plays a role in driving the rotating cylinder 32 to rise and fall and preventing the rotating cylinder 32 from accidentally falling out.

[0031] See Figure 3 As shown, a limiting column 330 is formed protruding from the front end of the rotating cylinder 32, and a limiting hole 313 is provided on the connecting cylinder 31. The limiting hole 313 is in a bracket shape, and the limiting column 330 is inserted in the limiting hole 313 to limit the circumferential position of the rotating cylinder 32. The limiting hole 313 is provided to prevent the rotating cylinder 32 from rotating excessively, because when the device is running at a high speed, the first ball 53 and the second ball 54 may fall out of the first spiral groove 51 and the second spiral groove 52, which will cause damage to the machine body. Therefore, the limiting hole 313 and the limiting column 330 are provided to prevent similar situations from occurring, thereby enhancing the reliability of the device. The limiting hole 313 is in a bracket shape to adapt to the movement trajectory of the limiting column 330 when the rotating cylinder 32 rotates.

[0032] The transmission member 4 is respectively formed with a first through hole 41 and a second through hole 42, and correspondingly, the connecting tube 31 is formed with a first hinge portion 301 matching the first through hole 41, and the eccentric wheel 22 is formed with a second hinge portion 302, and the transmission member 4 is connected to the connecting tube 31 by passing the first hinge portion 301 and the first through hole 41 through the first pin 7, and the transmission member 4 is connected to the eccentric wheel 22 by inserting the second hinge portion 302 and the second through hole 42 through the second pin 8. In this embodiment, an eccentric wheel 22 is used in cooperation with the transmission member 4. Specifically, since the second hinge part 302 is eccentrically arranged, eccentric movement will be generated when the eccentric wheel 22 rotates. When the second hinge part 302 moves in a direction away from the movable component 3, a pulling force will be generated on the transmission member 4, further driving the movable component 3 to retract into the shell 1; after reaching the farthest point, the eccentric wheel 22 continues to rotate, and the second hinge part 302 moves in a direction close to the movable component 3, generating a thrust on the transmission member 4, driving the movable component 3 to extend out of the shell 1, and this cycle is repeated to realize the lifting function of the movable component 3.

[0033] The inner wall of the housing 1 is provided with a first guide rail 101 and a second guide rail 102, respectively. Correspondingly, the two sides of the connecting tube 31 are provided with a first slider 315 and a second slider 316, respectively used to match the first guide rail 101 and the second guide rail 102 and guide the connecting tube 31, and the cross-sectional shapes of the first slider 315 and the second slider 316 are both T-shaped. Among them, the shape of the first slider 315 and the second slider 316 can guide the connecting tube 31, effectively avoiding the circumferential shaking of the movable component 3 under high-speed movement. In addition, the first guide rail 101 and the second guide rail 102 have cross-sectional shapes that are adapted to the first slider 315 and the second slider 316, and the first guide rail 101 and the second guide rail 102 are both matched.

[0034] See Figure 2 As shown, the rotating cylinder 32 partially extends out of the housing 1, and the rotating cylinder 32 is formed with a stepped groove 322 for limiting the rotating cylinder 32. Correspondingly, the housing 1 is formed with a blocking portion 13 for pressing and limiting the stepped groove 322. The cooperation between the stepped groove 322 and the blocking portion 13 can effectively prevent the rotating cylinder 32 from being stuck in the housing 1 during high-speed operation. In addition, a rubber ring 62 is arranged in the stepped groove 322, and the rubber ring 62 is used to prevent the stepped groove 322 from excessively colliding with the blocking portion 13 during high-speed operation to cause damage.

[0035] The rotating cylinder 32 is formed with an inner cavity 323 , in which a massage head 9 is disposed, and a portion of the massage head 9 is exposed outside the rotating cylinder 32 .

[0036] In this embodiment, a first sleeve 91 and a second sleeve 92 are respectively provided at the opening of the rotating cylinder 32. The first sleeve 91 and the second sleeve 92 can prevent foreign matter from entering the interior of the device, thus playing a protective and decorative role.

[0037] In the second embodiment of the present utility model, see Figure 3 and Figure 5As shown, a bearing 6 is sleeved on the pivot shaft 320, and an annular groove 321 is formed at the end of the pivot shaft 320. The connecting tube 31 is provided with a through hole 61 for positioning the bearing 6. The connecting tube 31 is provided with a positioning piece 310 for axially limiting the bearing 6. The connecting tube 31 is also provided with a positioning cover 311 for covering the end of the pivot shaft 320 and limiting its axial position. The positioning cover 311 is protrudingly formed with a protrusion 312 matching the annular groove 321. The bearing 6 is sleeved on the pivot shaft 320 and limited on the connecting tube 31 by the positioning piece 310. At the same time, the end of the pivot shaft 320 will pass through the through hole 61 and the positioning piece 310 to be exposed outward. The positioning cover 311 is fixed to the end of the pivot shaft 320 to prevent the bearing 6 from falling out, and to prevent the rotating tube 32 from accidentally falling out. Compared with the first embodiment, this embodiment is different only in the assembly method of the bearing 6, and the rest of the structures are the same, which will not be described in detail here.

[0038] In summary, in the present invention, the power element 21 of the driving assembly 2 drives the transmission member 4 through the eccentric wheel 22, and the transmission member 4 further drives the movable assembly 3 to reciprocate. At the same time, the guide device 5 acts between the inner wall of the housing 1 and the rotating cylinder 32, so that the rotating cylinder 32 rotates with the pivot shaft 320 as the rotation center axis, and the massage head 9 is arranged on the rotating cylinder 32, so that the massage head 9 can rotate while reciprocating, satisfying various massage actions. In addition, compared with the existing structure, the present invention avoids the use of a bevel gear set through the articulation of the eccentric wheel 22 and the transmission member 4, reduces the transmission level, improves the transmission efficiency, reduces the overall volume, and enhances the portability of the product.

[0039] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A rotary telescopic mechanism, comprising a housing (1), a driving assembly (2) installed in the housing (1), and a movable assembly (3) driven by the driving assembly (2), characterized in that: The driving assembly (2) comprises a power element (21) and an eccentric wheel (22) arranged on the power element (21); The movable assembly (3) comprises a connecting cylinder (31) and a rotating cylinder (32) rotatably arranged on the connecting cylinder (31); a pivot shaft (320) is arranged at one end of the rotating cylinder (32), and the pivot shaft (320) is assembled and connected with the connecting cylinder (31); A transmission member (4) is hingedly connected to the eccentric wheel (22), and the other end of the transmission member (4) is hingedly connected to the connecting tube (31). The power element (21) drives the movable component (3) to reciprocate along the inner cavity of the housing (1) through the eccentric wheel (22) and the transmission member (4). The inner wall of the housing (1) is provided with a guide device (5) for causing the rotating cylinder (32) to rotate about the pivot shaft (320) as the central axis of rotation, and the rotating cylinder (32) is provided with a first spiral groove (51) and a second spiral groove (52) matching the guide device (5) respectively around its periphery.

2. A rotating and telescopic mechanism according to claim 1, characterized in that: The guide device (5) comprises a first ball bracket (11) and a second ball bracket (12) respectively arranged on the inner wall of the housing (1), and a first ball (53) and a second ball (54) respectively installed in the first ball bracket (11) and the second ball bracket (12).

3. A rotating and telescopic mechanism according to claim 1, characterized in that: A bearing (6) is arranged in the connecting cylinder (31), and the pivot shaft (320) is assembled in the bearing (6) in an interference fit manner.

4. The rotating and telescopic mechanism according to claim 1, characterized in that: A bearing (6) is sleeved on the pivot shaft (320), and an annular groove (321) is formed on the end of the pivot shaft (320). The connecting tube (31) is provided with a through hole (61) for positioning the bearing (6). The connecting tube (31) is also provided with a positioning sheet (310) for axially limiting the bearing (6). The end of the pivot shaft (320) is covered with a positioning cover (311) for axially limiting the pivot shaft (320), and a protrusion (312) matching the annular groove (321) is protruded on the positioning cover (311).

5. The rotary telescopic mechanism according to claim 1, characterized in that: A limiting column (330) is formed protruding from the front end of the rotating cylinder (32), and a limiting hole (313) is provided on the connecting cylinder (31). The limiting hole (313) is in a bracket shape, and the limiting column (330) is inserted into the limiting hole (313) to limit the circumferential position of the rotating cylinder (32).

6. The rotating and telescopic mechanism according to claim 1, characterized in that: The transmission member (4) is respectively formed with a first through hole (41) and a second through hole (42), and correspondingly, the connecting tube (31) is formed with a first hinged portion (301) matching the first through hole (41), and the eccentric wheel (22) is formed with a second hinged portion (302), the second hinged portion (302) is eccentrically arranged, and the transmission member (4) is connected to the connecting tube (31) by passing through the first hinged portion (301) and the first through hole (41) via a first latch (7), and the transmission member (4) is connected to the eccentric wheel (22) by inserting the second hinged portion (302) and the second through hole (42) via a second latch (8).

7. The rotary telescopic mechanism according to claim 1, characterized in that: The inner wall of the housing (1) is respectively provided with a first guide rail (101) and a second guide rail (102), and correspondingly, the two sides of the connecting tube (31) are respectively provided with a first slider (315) and a second slider (316) for matching with the first guide rail (101) and the second guide rail (102) and guiding the connecting tube (31), and the cross-sections of the first slider (315) and the second slider (316) are both T-shaped.

8. A rotating and telescopic mechanism according to any one of claims 1 to 7, characterized in that: The rotating cylinder (32) partially extends out of the shell (1), and a stepped groove (322) for limiting the position of the rotating cylinder (32) is formed around the rotating cylinder (32). Correspondingly, a blocking portion (13) for pressing against the stepped groove (322) for limiting the position is formed on the shell (1).

9. A rotating and telescopic mechanism according to any one of claims 1 to 7, characterized in that: The rotating cylinder (32) is formed with an inner cavity (323), a massage head (9) is arranged in the inner cavity (323), and a portion of the massage head (9) is exposed outside the rotating cylinder (32).

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