A fascia gun

Abstract

The utility model relates to a fascia gun, including main part and massage head subassembly, the main part includes main casing, battery, motor and drive mechanism, the main casing includes the main cavity that sets up transversely and the handle cavity that is angularly arranged with main cavity, battery and motor electricity are connected and located handle cavity, motor is located battery top and partially exceeds handle cavity, massage head subassembly includes massage head, connecting part and with the piston that drive mechanism connects, connecting part includes first connecting part and second connecting part, and the connecting hole that second connecting part sets up is entered for first connecting part, one of first connecting part and second connecting part is fixed in massage head, and the other is fixed in the piston, first connecting part is provided with first spiral, and the connecting hole is provided with the second spiral that cooperates with first spiral, and the piston is detachably connected through the rotary connection of second spiral and first spiral to make massage head. The utility model can improve user experience.

Description

[0001] This application is a divisional application of Chinese patent application filed on March 15, 2024, with application number 202420516211X and invention title "A Massage Head Assembly and Fascia Gun". Technical Field

[0002] This utility model relates to the field of massage technology, and in particular to a fascia gun. Background Technology

[0003] Fascia guns, through the close contact between the massage head at the front end and the body's muscles, can effectively relieve muscle fatigue, promote blood circulation, and accelerate lactic acid metabolism. With the increasing popularity of fascia guns, users' demands for a better user experience are also rising. However, fascia gun massage heads currently on the market generally suffer from two problems: First, the connection point of the massage head is prone to wobbling after prolonged use, leading to instability. This wobbling not only affects the stability of the massage head but may also cause discomfort to the user and even damage the fascia gun with prolonged use. Second, the motor is often installed in the horizontal main cavity and coaxially with it, resulting in a relatively heavy main cavity that is prone to tipping over during use, causing discomfort. Summary of the Invention

[0004] This invention provides a massage head assembly and a fascia gun to improve the user experience.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A fascia gun includes a main body and a massage head assembly. The main body includes a main housing, a battery, a motor, and a drive mechanism. The main housing includes a horizontally arranged main cavity and a handle cavity angled to the main cavity. The battery and the motor are electrically connected and located within the handle cavity, with the motor positioned above the battery and partially extending beyond the handle cavity. The massage head assembly includes a massage head, a connecting portion, and a piston connected to the drive mechanism. The connecting portion includes a first connecting portion and a second connecting portion. The second connecting portion has a connecting hole for the first connecting portion to enter. One of the first connecting portion and the second connecting portion is fixed to the massage head, and the other is fixed to the piston. The first connecting portion has a first spiral, and the connecting hole has a second spiral that engages with the first spiral. The second spiral and the first spiral are rotatably connected to allow the massage head and the piston to be detachably connected.

[0007] Preferably, it further includes a limiting member, the limiting member including an elastic fixing part; the elastic fixing part is disposed between the first connecting part and the connecting hole, so that the first connecting part is interference-fitted with the connecting hole and / or the second spiral.

[0008] Preferably, the motor and the battery are coaxially distributed.

[0009] Preferably, the ratio of the portion of the motor extending beyond the handle cavity to the portion located within the handle cavity is 1 / 4.

[0010] Preferably, a shock-absorbing element is provided at the gap between the battery and the motor.

[0011] Preferably, the shock absorber has a hollow interior, a through hole at the top for the protrusion at the bottom of the motor to pass through, and an inwardly recessed clearance groove at the bottom, which provides space for the battery mounting structure.

[0012] Preferably, the bottom of the motor is provided with an insulating sleeve, and the shock absorber is provided with a receiving groove to accommodate the insulating sleeve; the shock absorber is also provided with a wire groove for the wire to pass through.

[0013] Preferably, the inner surface of the handle cavity has a plurality of fixing plates extending toward the battery, each of the fixing plates abutting against the battery.

[0014] Preferably, both the fixing plate and the battery are arranged along the length direction of the handle cavity, and the battery adopts a triangular battery pack. There are 3 fixing plates, and each fixing plate is respectively abutted against the center line of each side of the battery along the length direction of the handle cavity.

[0015] Preferably, a battery support base is fixed inside the handle cavity, and the battery support base abuts against the bottom of the battery.

[0016] Preferably, multiple battery support bases are provided, and the battery support bases and the fixing plate are staggered along the circumference of the handle cavity.

[0017] Preferably, the main cavity is composed of the internal space of the upper shell, and the upper shell includes an upper half shell, which is distributed in a multi-level stepped manner.

[0018] Preferably, the upper shell is arranged in three steps, including a zero-level step where the fascia gun head cover is located, a second-level step where the hump is located, and a first-level step where the upper surface of the upper shell is located between the head cover and the hump. The shell diameter of the zero-level step, the first-level step and the second-level step are arranged in ascending order.

[0019] Preferably, the hump has heat dissipation holes, the distance between the first-level step and the transverse axis of the main cavity is C, the distance between the second-level step and the first-level step is D, and C is 4.32 times D. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is an exploded view of the massage head assembly in Embodiment 1 of this utility model;

[0022] Figure 2 This is a schematic diagram of the blocking plate in Embodiment 1 of the massage head assembly of this utility model;

[0023] Figure 3 This is a schematic diagram of the mounting post in Embodiment 1 of the massage head assembly of this utility model;

[0024] Figure 4 This is a schematic diagram of the connecting part in Embodiment 2 of the massage head assembly of this utility model;

[0025] Figure 5 This is a schematic diagram of the massage head assembly in embodiment 4 of this utility model. Figure 1 ;

[0026] Figure 6 This is a schematic diagram of the massage head assembly in embodiment 4 of this utility model. Figure 2 ;

[0027] Figure 7 This is a schematic diagram of the massage head assembly in embodiment 4 of this utility model. Figure 3 ;

[0028] Figure 8 This is a schematic diagram of the massage head assembly in embodiment 5 of this utility model. Figure 1 ;

[0029] Figure 9 This is a schematic diagram of the massage head assembly in embodiment 5 of this utility model. Figure 2 ;

[0030] Figure 10 This is a schematic diagram of the overall structure of the massage head assembly in Embodiment 6 of this utility model;

[0031] Figure 11 This is a schematic diagram of the connection hole in Embodiment 6 of the massage head assembly of this utility model;

[0032] Figure 12 This is a schematic diagram of the overall structure of the massage head assembly in embodiment 7 of this utility model;

[0033] Figure 13This is a schematic diagram of the connection hole in Embodiment 7 of the massage head assembly of this utility model;

[0034] Figure 14 This is a schematic diagram of the triangular prism structure of the first connecting post, limiting groove, elastic fixing part and connecting hole in Embodiment 8 of the massage head assembly of this utility model;

[0035] Figure 15 This is a schematic diagram of a square column structure for the first connecting column, limiting groove, elastic fixing part and connecting hole in Embodiment 8 of the massage head assembly of this utility model;

[0036] Figure 16 This is a schematic diagram of the cross-shaped structure of the first connecting post, limiting groove, elastic fixing part and connecting hole in Embodiment 8 of the massage head assembly of this utility model;

[0037] Figure 17 This is an embodiment of the present utility model. Figure 16 Schematic diagram of the central cross column;

[0038] Figure 18 This is a schematic diagram of the fascia gun in this utility model. Figure 1 ;

[0039] Figure 19 This is a schematic diagram of the fascia gun in this utility model. Figure 2 ;

[0040] Figure 20 This is a cross-sectional view of the fascia gun in this utility model;

[0041] Figure 21 This is a schematic diagram of the fascia gun of this utility model (excluding the top cover).

[0042] Figure 22 This is a schematic diagram of the inner head cover of the fascia gun in this utility model. Figure 1 ;

[0043] Figure 23 This is a schematic diagram of the inner head cover of the fascia gun in this utility model. Figure 2 ;

[0044] Figure 24 This is a schematic diagram of the head cover and piston assembly in this utility model;

[0045] Figure 25 This is a schematic diagram of the inner upper shell of the fascia gun in this utility model;

[0046] Figure 26 This is a top view of the inner upper shell of the fascia gun in this utility model;

[0047] Figure 27 This is a diagram showing the dimensions and location of the upper hump on the upper shell of this utility model.

[0048] Figure 28 This is a schematic diagram of the lower inner shell of the fascia gun in this utility model. Figure 1 ;

[0049] Figure 29 In this utility model Figure 28 Enlarged diagram of A in the middle;

[0050] Figure 30 This is a schematic diagram of the lower inner shell of the fascia gun in this utility model. Figure 2 ;

[0051] Figure 31 In this utility model Figure 30 Enlarged diagram of B in the diagram;

[0052] Figure 32 This is a schematic diagram of the shock-absorbing component in this utility model;

[0053] Figure 33 This is a bottom view of the handle shell and battery in this utility model;

[0054] Figure 34 This is a top view of the handle shell and battery in this utility model.

[0055] Explanation of reference numerals in the attached figures:

[0056] 1. Massage head; 1001. Striking part; 2. Connecting part; 201. Boss; 202. First connecting post; 203. Second connecting post; 204. Connecting hole; 205. Elastic fixing part; 206. Elastic abutment part; 207. Limiting groove; 208. Arc-shaped groove; 3. Piston; 4. First spiral; 5. Second spiral; 6. Baffle plate; 61. First vent hole; 62. Positioning post; 7. Connecting rod; 8. Mounting post; 81. First mounting groove; 82. Positioning hole; 83. Second vent hole; 9. First internal thread; 10. First external thread; 11. Protrusion; 12. Spiral groove; 13. Limiting protrusion; 14. Limiting plate; 15. Shock absorption structure; 151. Hard ball bearing; 152. Soft buffer part; 16. Fixing ring;

[0057] 17. Upper housing; 171. Limiting post; 172. Upper connecting post; 173. Sealing edge; 174. Display structure mounting groove; 175. Upper baffle; 18. Lower housing; 181. Head cover connecting ring; 182. Annular mounting groove; 183. Head cover connecting hole; 184. Upper cover limiting groove; 185. Second mounting groove; 186. Lower connecting post; 1861. Mounting wall; 1862. Connecting groove; 1863. Lower connecting hole; 187. Sealing groove; 188. Lower baffle; 19. Head cover; 191. Third connecting post; 192. Annular groove; 193. Annular boss; 194. Reinforcing plate; 195. Wear-resistant ring; 196. Fourth connecting post; 197. Fastener Components; 20. Hump; 2001. Lateral heat dissipation hole; 2002. Longitudinal heat dissipation hole; 2003. Semi-annular groove; 21. Handle shell; 2111. Fixing plate; 2112. Battery support base; 2113. Charging board mounting post; 22. Battery; 23. Motor; 24. Motor fixing plate; 2411. Drive groove; 25. Insulating sleeve; 26. Shock absorber; 2611. Clearance groove; 2612. Receiving groove; 2613. Wire groove; 27. Eccentric wheel; 28. Bearing; 29. ​​Annular flange; 30. Display control board; 31. Tail cover; 32. Display board; 33. Arc structure; 34. Bottom cover structure; 3411. Charging cover; 3412. Charging board. Detailed Implementation

[0058] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0059] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0061] This utility model provides a massage head assembly for use in a fascia gun, such as... Figure 1 As shown, the fascia gun specifically includes a massage head 1, a connecting part 2, and a piston 3. A connecting rod 7 is also provided inside the fascia gun, and the piston 3 is connected to the connecting rod 7. The massage head 1 has a striking part 1001, which is used for muscle massage, physiotherapy, etc. The shape of the striking part 1001 includes, but is not limited to, a cylindrical structure, a prism structure, a spherical structure, a wave structure, a flat plate structure, or a combination of the above structures. The piston 3 is connected to one end of the connecting rod 7, and the other end of the connecting rod 7 is connected to the driving end of the drive assembly inside the fascia gun. The connecting part 2 connects the piston 3 and the massage head 1, so that the drive assembly inside the fascia gun can drive the connecting rod 7, which in turn drives the piston 3 to reciprocate linearly. The piston 3, through the connecting part 2, drives the massage head 1 to reciprocate, thus achieving massage.

[0062] A common problem with existing massage head assemblies for fascia guns is that the connection between the massage head 1 and the piston 3 tends to wobble after prolonged use, leading to unstable connections. This wobble not only affects the stability of the massage head 1 but can also cause discomfort to the user and may even damage the fascia gun due to long-term use. In this embodiment, the connecting part 2 in the massage head assembly is used to connect the massage head 1 and the piston 3. The connecting part 2 specifically includes a first connecting part and a second connecting part. One of the first connecting part and the second connecting part is connected to the massage head 1, and the other is connected to the piston 3. It should be noted that the connection here can be separate and then fixed by the structure or directly integrated. The first connecting part has a first spiral 4, and the second connecting part has a connecting hole 204 for the first connecting part to enter. The connecting hole 204 has a second spiral 5 that mates with the first spiral 4. The first connecting part is inserted into the connecting hole 204 through the rotational connection of the first spiral 4 and the second spiral 5, thereby realizing the detachable connection between the massage head 1 and the piston 3. It can be seen that both the first spiral 4 and the second spiral 5 have corresponding protrusions and grooves that mate with each other. If they are both continuous spiral structures, then the first spiral 4 can be regarded as an external thread and the second spiral 5 as an internal thread. The two are connected by rotation to realize the connection between the massage head 1 and the piston 3. Therefore, the specific structure of the first spiral 4 and the specific structure of the second spiral 5 can be as long as they can achieve the rotational engagement to realize the rotational connection between the massage head 1 and the piston 3. In the above, the first spiral 4 and the second spiral 5 are essentially equivalent to the threaded connection of the internal thread and the external thread. The threaded connection has a longer fastening path at the connection point, making it less prone to loosening. On the other hand, it makes it easier to disassemble the massage head 1 and the piston 3, which is convenient for maintenance and replacement.

[0063] Furthermore, to make the connection between the piston 3 and the massage head 1 more stable, the connecting part 2 also includes an elastic fixing part 205, wherein the elastic fixing part 205 is made of an elastic material, has elasticity, and can be squeezed and stretched, specifically a rubber sleeve; when the piston 3 and the massage head 1 are connected, the first connecting part is located in the connecting hole 204, and the first spiral 4 and the second spiral 5 are connected in a cooperative manner. At this time, the elastic fixing part 205 is located between the first connecting part and the connecting hole 204, so that the first connecting part and / or the second spiral 5 are interference-fitted. Specifically, this includes the following situations: First: the elastic fixing part 205 is sleeved on the first connecting part except for the first spiral 4. The outer wall of the first connecting part excluding the location of the first spiral 4, the outer wall of the elastic fixing part 205 abuts against the inner wall of the connecting hole 204 excluding the location of the second spiral 5, and the elastic fixing part 205 is compressed so that the first connecting part and the connecting hole 204 are indirectly interference-fitted; the second type: the elastic fixing part 205 is sleeved on the outer wall of the first connecting part excluding the location of the first spiral 4, the outer wall of the elastic fixing part 205 abuts against the protrusion of the second spiral 5, and the elastic fixing part 205 is compressed so that the first connecting part and the connecting hole 204 are indirectly interference-fitted; the third type: the elastic fixing part 205 is sleeved on the outer wall of the first connecting part excluding the location of the first spiral 4. On the outer sidewall, part of the elastic fixing part 205 abuts against the protrusion of the second spiral 5, and another part abuts against the inner sidewall of the connecting hole 204. The elastic fixing part 205 is compressed, causing the first connecting part and the connecting hole 204 to be indirectly interference-fitted. Fourthly, the elastic fixing part 205 is located on the inner sidewall of the connecting hole 204, the protrusion of the first spiral 4 abuts against the inner sidewall of the elastic fixing part 205, and the elastic fixing part 205 is compressed, causing the first connecting part and the connecting hole 204 to be indirectly interference-fitted. In summary, all four installation methods of the elastic fixing part 205 ensure an interference fit between the first connecting part and the connecting hole 204, which on the one hand... This seals the connection, preventing moisture, dust, and other impurities from entering. Furthermore, friction enhances connection stability and provides axial or circumferential shock absorption, effectively reducing impact and vibration during operation. The elastic fixing part 205 circumferentially wraps around the outer wall of the first connection, mitigating the force exerted by the human body on the gun body and preventing bending at the connection. This protects the connection from damage and extends its lifespan. Moreover, the flexibility of the elastic fixing part 205 makes it easier to detach during disassembly, reducing friction and damage during disassembly.

[0064] The first connecting part includes a first connecting post 202 and a boss 201. A first spiral 4 is disposed on the first connecting post 202. The connecting part 2 also includes an elastic abutment part 206, which is made of an elastic material and is elastic and can be compressed. Specifically, it can be a rubber sleeve. When the massage head 1 and the piston 3 are connected, the first connecting post 202 enters the connecting hole 204. At this time, the boss 201 is located outside the connecting hole 204. The elastic abutment part 206 is sleeved on the outside of the first connecting post 202 and is located between the boss 201 and the second connecting part. The elastic abutment part 206 is compressed to fill the gap between the boss 201 and the second connecting part, making the connection structure between the massage head 1 and the piston 3 more compact, limiting the axial and circumferential movement of the massage head 1, and preventing shaking. It should be noted that the elastic fixing part 205 and the elastic abutment part 206 can be separate and spaced apart, or they can be integrated. Preferably, they are arranged as follows: Figure 1 The structure shown.

[0065] In summary, the massage head 1 in this utility model is first connected by a first connecting part and a second connecting part, that is, the rotational connection of the first spiral 4 and the second spiral 5, which serves as a threaded connection, making the connection more stable. Then, by setting an elastic fixing part 205, the first connecting part is installed in the connecting hole 204, which increases the friction and enhances the connection stability, reducing the wear between the connecting part 2 and the connecting hole 204. Furthermore, an elastic abutment part 206 is set to fill the connection gap between the first connecting part and the second connecting part, making the connection structure more compact and limiting the axial and circumferential movement of the massage head 1 to prevent shaking. Thus, the three parts work together to make the connection between the massage head 1 and the piston 3 more stable, increasing the service life of the massage head 1 and the user experience.

[0066] Specifically, the structure of the massage head assembly is shown below:

[0067] Example 1

[0068] like Figure 1-3As shown, the massage head assembly in this embodiment specifically includes a massage head 1, a connecting part 2, and a piston 3. A connecting rod 7 is also provided inside the fascia gun. The piston 3 is connected to the connecting rod 7. The connecting part 2 includes a first connecting part and a second connecting part. The first connecting part includes a boss 201 and a first connecting post 202. The boss 201 is integrally fixedly connected to or detachably connected to the side wall of the massage head 1 away from the striking part. The first end of the first connecting post 202 is fixedly or detachably connected to the side wall of the boss 201 away from the massage head 1. The detachable connection can be a bolt connection. The massage head 1, the boss 201, and the first connecting post 202 are all coaxially arranged. The boss 201 has a certain thickness, and its outer diameter is larger than the diameter of the first connecting post 202. The second connecting part is close to the outer diameter of the end of the massage head 1. This makes the connection between the first connecting post 202 and the massage head 1 more secure, reduces the gap between the massage head 1 and the piston 3, enhances stability, and is more aesthetically pleasing. The outer periphery of the connecting post 202 has a first spiral 4, which has a certain length in the axial direction and preferably forms more than one turn of the first spiral. The second connecting part includes a second connecting post 203, which is connected to the piston 3. The side wall of the second connecting post 203 near the massage head 1 is recessed to form a connecting hole 204 coaxial with the piston 3. The connecting hole 204 has a second spiral 5 that cooperates with the first spiral 4. The second spiral 5 has a certain length in the axial direction and forms at least one turn of the second spiral. Through the rotational cooperation of the first spiral 4 and the second spiral 5, the first connecting post 202 is inserted into the connecting hole 204, realizing the detachable connection between the first connecting part and the second connecting part. Moreover, the end of the first spiral 4 preferably extends to the end of the connecting hole 204 near the massage head 1, and the end of the second spiral 5 preferably extends to the end of the connecting hole 204 near the massage head 1, thereby reducing the shaking of the two at the beginning of the connection, preventing damage to the threads, and increasing the connection firmness. It should be noted that the positions of the first connecting part and the second connecting part in the above description of this embodiment 1 can also be interchanged. That is, the way in which the boss 201 and the first connecting post 202 are connected to the piston 3 and the second connecting post 203 is connected to the massage head 3 is another implementation method.

[0069] Preferably, in order to facilitate the insertion of the first connecting post 202 into the connecting hole 204, the second end of the first connecting post 202 is provided with a rounded corner or a chamfer.

[0070] Both the first spiral 4 and the second spiral 5 have a certain length in the axial direction. The spiral thread can be a trapezoidal thread. When the first spiral 4 includes multiple spiral turns and the second spiral 5 includes multiple spiral turns, then both the first spiral 4 and the second spiral 5 have corresponding protrusions and grooves. Preferably, the width ratio of the protrusion to the groove in the first spiral 4 is between 2 and 5 times. Correspondingly, the protrusion and groove of the second spiral 5 are arranged to satisfy the rotational connection between the first spiral 4 and the second spiral 5. This arrangement has the following advantages: 1. Improved load-bearing capacity of the massage head assembly: The wide spiral portion can distribute the load, making the massage head assembly less prone to loosening or damage when subjected to greater pressure or tension, thus improving the stability and load-bearing capacity of the massage head assembly; 2. Improved anti-slip performance of the massage head assembly: The wide spiral can increase the friction between the first and second spirals, preventing the massage head from loosening or falling off due to vibration during movement, thus improving the anti-slip performance of the massage head assembly; 3. Convenient disassembly and assembly: The wide spiral makes it easier to align the massage head during disassembly and assembly, reducing operational difficulty and improving work efficiency; 4. Enhanced aesthetics of the massage head assembly: The wide spiral design makes the surface of the massage head assembly look more beautiful, improving the overall appearance quality of the product.

[0071] Correspondingly, the connecting part 2 also includes a limiting member, which includes an elastic fixing part 205 and an elastic abutment part 206. The elastic fixing part 205 and the elastic abutment part 206 are coaxially arranged, and the elastic abutment part 206 is located at the end of the elastic fixing part 205 and the two are integrally formed. Correspondingly, a limiting groove 207 is provided circumferentially at the end of the first connecting post 202 near the boss 201. Both the elastic fixing part 205 and the elastic abutment part 206 are sleeve structures. During installation, they are sleeved on the outer periphery of the limiting groove 207 to axially limit the elastic fixing part 205 and the elastic abutment part 206. Preferably, the axial length of the limiting member formed by the elastic fixing part 205 and the elastic abutment part 206 does not exceed and is close to the axial length of the limiting groove 207, and the length error between the two does not exceed 0.1 cm. Specifically, the outer diameter of the elastic fixing part 205 is not less than the inner groove of the second spiral 5. The small diameter d1 of the elastic abutment 206 is larger than the diameter of the connecting hole 204, preferably equal to it. When the massage head 1 is connected to the piston 3, the first connecting post 202 is screwed into the connecting hole 204 through the rotational connection of the first spiral 4 and the second spiral 5. At this time, the elastic fixing part 205 is located between the outer wall of the limiting groove 207 and the second spiral 5, and is squeezed by the protrusion of the second spiral 5, filling the fitting gap between the protrusion of the second spiral 5 and the limiting groove 207. This results in an indirect interference fit between the first connecting post 202 and the connecting hole 204, forming a sealed space in the connecting hole 204 to prevent moisture, dust and other impurities from entering. At the same time, the friction between the connecting hole 204 and the first connecting post 202 is significantly enhanced. Moreover, at this time, the elastic abutment 206 is located outside the connecting hole 204 and between the boss 201 and the second connecting post 203, and is squeezed. Preferably, the top of the elastic fixing part 205 facing the connecting hole 204 can be appropriately designed as a chamfer or rounded corner, and / or the opening of the connecting hole 204 is flared or chamfered or rounded corner, which makes it easier for the elastic fixing part 205 to be inserted into the connecting hole 204.

[0072] In this embodiment, the first connecting part is fixed to the massage head, and the second connecting part is fixed to the piston. Correspondingly, the second connecting post 203 is integrally formed with the piston 3. The second connecting post 203 is located at the end of the piston 3 near the massage head 1, and the connecting hole 204 penetrates the entire piston 3. Specifically, the two ends of the piston 3 have different diameters, forming a step. A circumferential ring-shaped limiting plate 14 is also formed at the step. The end of the piston 3 away from the massage head 1 is fitted with a shock-absorbing structure 15, which, when installed inside the fascia gun, can counteract the lateral swaying during the operation of the connecting rod. The connecting rod 7 is used to drive the piston 3. In this embodiment, the first end of the connecting rod 7 is connected to the drive assembly of the fascia gun, and the second end is provided with a mounting post 8. The mounting post 8 is provided with a first mounting groove 81 on the side wall near the massage head 1. In order to facilitate the installation of the end of the piston 3 away from the massage head 1 in the first mounting groove 81, a blocking plate 6 is provided at the end of the piston 3 away from the massage head 1. The blocking plate 6 is used to close the connection hole 204. When connecting, the end of the piston 3 away from the massage head 1 is installed in the first mounting groove 81. The blocking plate 6 is connected to the bottom of the first mounting groove 81 by bolts. At this time, the two side walls of the shock absorption structure 15 are respectively abutted by the limiting plate 14 and the side wall of the mounting post 8, and are clamped in the middle. The blocking plate 6 is provided with a first mounting hole, and the bottom of the corresponding first mounting groove 81 is provided with a corresponding threaded hole. The blocking plate 6 is connected to the bottom of the first mounting groove 81 by bolts. Of course, the threaded hole at the bottom of the first mounting groove 81 can also be a smooth hole. When using screws or bolts for fixing, the threads of the screws or bolts rotate on the surface of the hole to form threads.

[0073] Furthermore, when the first connecting post 202 is screwed into the connecting hole 204, the air inside the connecting hole 204 is compressed due to the sealing effect of the elastic fixing part 205, and the air pressure inside the connecting hole 204 will increase. In order to facilitate the smooth screwing of the first connecting post 202 into the connecting hole 204, a first vent hole 61 is provided at the bottom of the baffle plate 6. Correspondingly, a second vent hole 83 is provided at the bottom of the first mounting groove 81. The first vent hole 61 and the second vent hole are in the same position and preferably arranged opposite to each other along the length of the fascia gun. During the process of installing the piston 3 end into the first mounting groove 81, the air in the connecting hole 205 can be discharged through the first vent hole 61 and the second vent hole 83. After the piston 3 is installed, during the process of the first connecting post 202 being screwed into the connecting hole 204, the air in the connecting hole 204 can be discharged to the external environment through the first vent hole 61 and the second vent hole 83, which facilitates the screwing of the first connecting post 202 into the connecting hole 204. Of course, the first vent 61 can also be set on the wall of the connecting hole 204, as long as it is connected to the outside. The corresponding second connecting hole 204 should also be set to ensure that the connecting hole 204 and the second connecting hole 204 can be connected after the piston 3 is installed.

[0074] Preferably, at least one positioning post 62 is provided on the side wall of the baffle plate 6 away from the massage head 1, and a corresponding number of positioning holes 82 are provided in the first mounting groove 81. During installation, the positioning post 62 is installed in the corresponding positioning hole 82 to achieve the positioning installation of the piston 3. Moreover, the positioning post 62 also has a circumferential limiting function to prevent the piston 3 from rotating circumferentially in the first mounting groove 81, so that the installation of the piston 3 and the connecting rod 7 is more stable.

[0075] Correspondingly, the shock-absorbing structure 15 specifically includes a hard ball bearing 151 and a soft buffer part 152. The soft buffer part 152 is sleeved on the piston 3, and the hard ball bearing 151 is rolled and embedded in the soft buffer part 152 and partially protrudes from the outer wall of the soft buffer part 152. The soft buffer part 152 is an elastic sleeve, which has a good shock absorption effect, low cost, and is easy to obtain. Specifically, the outer periphery of the elastic sleeve is provided with a ball bearing mounting groove for mounting the hard ball bearing 151. The hard ball bearing 151 is rolled and positioned in the ball bearing mounting groove, and the area of ​​the hard ball bearing 151 exposed in the ball bearing mounting groove is not greater than the area located in the ball bearing mounting groove, so as to prevent the hard ball bearing 151 from falling out of the ball bearing mounting groove.

[0076] Specifically, the elastic sleeve has a split structure, including a first part and a second part. The first part has a first half-groove, and the second part has a second half-groove. The first and second half-grooves form a ball bearing mounting groove, facilitating the installation of the hard ball bearing 151. The first and second parts can be fixed by adhesive bonding, and can be fixed together under the action of the mounting structure. Of course, in other embodiments, the elastic sleeve is a one-piece structure, and the ball bearing mounting groove is a deformable structure. When it is necessary to insert the hard ball bearing 151 into the ball bearing mounting groove, force is applied to enlarge the opening of the ball bearing mounting groove. After the hard ball bearing 151 is inserted, the opening of the ball bearing mounting groove automatically shrinks, thereby confining the hard ball bearing 151 in the ball bearing mounting groove.

[0077] Example 2

[0078] like Figure 4 As shown, the difference between this embodiment and embodiment 1 is that the limiting member only includes the elastic fixing part 205, the inner diameter of the elastic fixing part 205 does not exceed the large diameter D2 of the inner protrusion of the first spiral 4, and correspondingly, the connecting column in this embodiment is not provided with a limiting groove 207.

[0079] Specifically, in this embodiment, the elastic fixing part 205 is located at the end of the connecting hole 204 away from the massage head 1. When the first connecting post 202 is installed in the connecting hole 204, after the first spiral 4 and the second spiral 5 are engaged, the first spiral 4 at the end of the first connecting post 202 away from the massage head 1 will be inserted into the elastic fixing part 205, thereby squeezing the elastic fixing part 205, indirectly causing the end of the first connecting post 202 away from the massage head 1 to be interference-fitted with the end of the connecting hole 204 away from the massage head 1. The difference from Embodiment 1 is that in this embodiment, the elastic fixing part 205 causes the end of the first connecting post 202 away from the massage head 1 to be interference-fitted with the end of the connecting hole 204 away from the massage head 1, while in Embodiment 1, the elastic fixing part 205 causes the end of the first connecting post 202 away from the massage head 1 to be interference-fitted with the end of the connecting hole 204 near the massage head 1.

[0080] Example 3

[0081] The difference between this embodiment and embodiment 1 is that the limiting member only includes the elastic abutment part 206. After installation, the elastic abutment part 206 is located between the boss 201 and the second connecting post 203, and the elastic abutment part 206 is squeezed, thereby reducing the shaking between the massage head 1 and the piston 3 to a certain extent.

[0082] Example 4

[0083] like Figure 5-7As shown, the massage head assembly in this embodiment specifically includes a massage head 1, a connecting part 2, and a piston 3. The piston 3 is connected to the connecting rod 7 in the drive mechanism inside the fascia gun. The connecting part 2 includes a first connecting part and a second connecting part. The first connecting part includes a first connecting post 202 and a boss. In this embodiment, the first connecting post 202 is disposed at the end of the piston 3 near the massage head 1 and is integrally formed. A fixing ring 16 is threadedly connected to the outer wall of the piston 3. The outer diameter of the fixing ring 16 is larger than the outer diameter of the first connecting post 202. When threadedly connected to the outer wall of the piston 3, it is equivalent to the aforementioned boss. A first helix 4 is formed on the outer wall of the first connecting post 202. In this embodiment, it is configured as a first external thread 10. The first external thread 10 extends to the end side wall of the first connecting post 202 near the massage head 1. The second connecting part includes a second connecting post 203, which is connected to the massage head 1. A connecting hole 204, coaxial with the second connecting post 203, is formed in the recessed side wall away from the massage head 1. A second spiral 5 is provided in the connecting hole 204, which is configured as a first internal thread 9 in this embodiment. The first internal thread 9 does not extend to the end side wall of the connecting hole 204 away from the massage head 1. The end of the connecting hole 204 away from the massage head 1 is a smooth hole with a diameter larger than the minor diameter of the first internal thread 9. The outer diameter of the elastic fixing part 205 is not smaller than the diameter of the smooth hole. When the massage head 1 is connected to the piston 3, it is only necessary to insert the end of the first connecting post 202 close to the massage head 1 into the connecting hole 204 and connect them together through the first external thread 10 and the first internal thread 9. At this time, the fixing ring 16 abuts against the outer side wall of the second connecting post 203. The elastic fixing part 205 is located between the outer side wall of the limiting groove 207 and the smooth hole and is squeezed by the side wall of the smooth hole, filling the fitting gap between the smooth hole and the limiting groove 207.

[0084] Furthermore, the connecting part 2 also includes a limiting member, which includes an elastic fixing part 205 and an elastic abutment part 206. The elastic fixing part 205 and the elastic abutment part 206 are coaxially arranged, and the elastic abutment part 206 is located at the end of the elastic fixing part 205 and the two are integrally formed. Correspondingly, the fixing ring 16 and the first external thread 10 are spaced apart, and a limiting groove 207 is provided on the outer wall of the piston 3 between the first external thread 10 and the fixing ring 16. During installation, the limiting member is sleeved on the outer periphery of the limiting groove 207, which can axially limit the elastic fixing part 205 and the elastic abutment part 206. Preferably, the axial length of the limiting member formed by the elastic fixing part 205 and the elastic abutment part 206 is equal to the axial length of the limiting groove 207, and the length error between the two does not exceed 0.1 cm. Specifically, the outer diameter of the elastic fixing part 205 is not less than the minor diameter of the first internal thread 9, and the outer diameter of the elastic abutment part 206 is the diameter of the hole 204. Thus, when the massage head 1 and the piston 3 are connected, the elastic fixing part 205 is located between the outer wall of the limiting groove 207 and the first internal thread 9, and is squeezed by the first internal thread 9, filling the fitting gap between the first internal thread 9 and the limiting groove 207. This results in an indirect interference fit between the end of the piston 3 (the first connecting post 202) and the connecting hole 204, forming a sealed space in the connecting hole 204 to prevent moisture, dust and other impurities from entering. At the same time, the friction at the connection point is significantly enhanced. Moreover, at this time, the elastic abutment part 206 is located outside the connecting hole 204 and between the fixing ring 16 and the second connecting post 203, and is squeezed. To facilitate the insertion of the first connecting post 202 into the connecting hole 204, the end of the first connecting post 202 near the massage head 1 is provided with a chamfer or rounded corner; the top of the elastic fixing part 205 facing the connecting hole 204 can be appropriately designed as a chamfer or rounded corner, and / or the opening of the connecting hole 204 is flared or provided with a chamfer or rounded corner, which makes it easier for the elastic fixing part 205 to be inserted into the connecting hole 204.

[0085] Of course, in another embodiment, the first internal thread 9 extends to the end side wall of the connecting hole 204 away from the massage head 1, and the outer diameter of the elastic fixing part 205 is not less than the aperture of the light hole. Thus, when the massage head 1 and the piston 3 are connected, the elastic fixing part 205 is located between the outer side wall of the limiting groove 207 and the first internal thread 9 and is squeezed to fill the fitting gap between the first internal thread 9 and the limiting groove 207.

[0086] The first end of the connecting rod 7 is connected to the drive component in the drive mechanism, and the second end is provided with a mounting post 8. The end of the piston 3 away from the massage head 1 is fixedly connected to the mounting post 8. The outer wall of the piston 3 is fitted with a shock-absorbing structure 15. The shock-absorbing structure 15 in this embodiment is the same as the shock-absorbing structure 15 in embodiment 1. When the connection is completed, the two side walls of the soft buffer part 152 in the shock-absorbing structure 15 abut against the mounting post 8 and the fixing ring 16 respectively.

[0087] Example 5

[0088] like Figure 8-9 As shown, compared to Embodiment 4, the following differences exist: the entire connecting hole 204 is a smooth hole, and the end of the first connecting post 202 near the massage head 1 is not provided with the first external thread 10, and is a smooth post. When connecting the massage head 1 and the piston 3 together, it is only necessary to insert the end of the piston 3 near the massage head 1 into the connecting hole 204. The elastic fixing part 205 in the corresponding limiting member will be located between the side wall of the end hole of the connecting hole 204 away from the massage head 1 and the first connecting post 202. It is also known that the major diameter of the elastic fixing part 205 is not greater than the diameter of the connecting hole 204. The elastic fixing part 205 is squeezed and deformed, which indirectly makes the piston 3 and the connecting hole 204 interference fit. Compared with directly making the piston 3 and the connecting hole 204 interference fit, it is easier to install and disassemble the first connecting post 202 and the connecting hole 204. At this time, the elastic abutment part 206 is located between the fixing ring 16 and the second connecting post 203, which is used to fill the gap between the two and play the role of shock absorption and limiting. To facilitate the insertion of the first connecting post 202 into the connecting hole 204, the piston 3 has a chamfer or rounded corner at the end near the massage head 1.

[0089] Example 6

[0090] like Figure 10-11As shown, the massage head assembly in this embodiment specifically includes a massage head 1, a connecting part 2, and a piston 3. The piston 3 is connected to the connecting rod 7 in the drive mechanism inside the fascia gun. The connecting part 2 includes a first connecting part and a second connecting part. The first connecting part includes a first connecting post 202 and a boss 201. The boss 201 is integrally fixedly connected to or detachably connected to the side wall of the massage head 1 away from the striking part 1001. The first end of the first connecting post 202 is fixedly or detachably connected to the side wall of the boss 201 away from the massage head 1. The detachable connection can be a bolt connection. The massage head 1, the boss 201, and the first connecting post 202 are all coaxially arranged. The first spiral 4 on the first connecting post 202 is set small so that the first spiral 4 can be regarded as a protrusion 11 relative to the second spiral 5. The second connecting part includes a second connecting post 203. The second connecting post 203 is disposed at the end of the piston 3 near the massage head 1. The second connecting post 203 is located near the side wall of the massage head 1. A recessed connection hole 204 is formed, within which a second spiral 5 is formed. The second spiral 5 extends to the end sidewall of the connection hole 204 near the end of the massage head 1. The protrusion 11 can travel within the second spiral 5. A limiting protrusion 13 that cooperates with the protrusion 11 is provided at the end of the groove of the second spiral 5. The limiting protrusion 13 is positioned in two ways: first, the limiting protrusion 13 is spaced apart from the bottom sidewall of the end of the second spiral 5, thus forming a storage space for the protrusion 11. When the massage head 1 and the piston 3 are connected, the protrusion 11 travels to the end of the second spiral 5 and passes the limiting protrusion 13, finally settling in the storage space; second, the limiting protrusion 13 is located at the bottom sidewall of the end of the second spiral 5. When the massage head 1 and the piston 3 are connected, the protrusion 11 travels to the end of the second spiral 5 and is located between the limiting protrusion 13 and the side groove wall of the second spiral 5. Of course, in this embodiment, the second spiral 5 is a spiral groove 12.

[0091] The connecting part 2 also includes a limiting member, which includes an elastic fixing part 205 and an elastic abutment part 206. The elastic fixing part 205 and the elastic abutment part 206 are coaxially arranged. The elastic abutment part 206 is located at the end of the elastic fixing part 205 and the two are integrally formed. Correspondingly, the end of the first connecting column 202 near the boss 201 is provided with a limiting groove 207 in the circumferential direction. Both the elastic fixing part 205 and the elastic abutment part 206 are sleeve structures. During installation, the limiting member is sleeved on the outer periphery of the limiting groove 207, which can axially limit the elastic fixing part 205 and the elastic abutment part 206. Preferably, the axial length of the limiting member formed by the elastic fixing part 205 and the elastic abutment part 206 is equal to the axial length of the limiting groove 207, and the length error between the two does not exceed 0.1cm. Specifically, the outer diameter of the elastic fixing part 205 is not less than the minor diameter of the second spiral 5, and the outer diameter of the elastic abutting part 206 is not less than the diameter of the connecting hole 204. Thus, when the massage head 1 and the piston 3 are connected, the elastic fixing part 205 is located between the outer wall of the limiting groove 207 and the groove of the second spiral 5, and is squeezed, filling the fitting gap between the second spiral 5 and the limiting groove 207. This results in an indirect interference fit between the first connecting post 202 and the connecting hole 204, forming a sealed space in the connecting hole 204 to prevent moisture, dust, and other impurities from entering. At the same time, the friction between the connecting hole 204 and the first connecting post 202 is significantly enhanced. Moreover, at this time, the elastic abutting part 206 is located outside the connecting hole 204 and between the boss 201 and the second connecting post 203, and is squeezed. The top of the elastic fixing part 205 facing the connecting hole 204 can be appropriately designed as a chamfer or rounded corner, and / or the opening of the connecting hole 204 is flared or chamfered or rounded corner, which makes it easier for the elastic fixing part 205 to be inserted into the connecting hole 204.

[0092] In this embodiment, the specific connection structure between the connecting rod 7 and the piston 3 is the same as that between the connecting rod 7 and the piston 3 in the massage head assembly in Embodiment 1, and will not be described again. Similarly, the outer wall of the piston 3 is fitted with a shock-absorbing structure 15. In this embodiment, the installation position and specific structure of the shock-absorbing structure 15 are also as described in Embodiment 1.

[0093] As another possible implementation, both the first spiral 4 and the second spiral 5 are configured as spirals with more than one turn. A limiting protrusion 13 is provided on the inner wall of the end of the first spiral 4 and / or the second spiral 5 away from each other. When the massage head 1 is installed on the piston 3, the corresponding second spiral 5 and / or first spiral 4 are press-fitted against the limiting protrusion 13, thereby further improving the stability of the massage head 1 installation.

[0094] Example 7

[0095] like Figure 12-13As shown, the difference between this embodiment and embodiment 6 is that, in this embodiment, the outer wall of the second connecting post 203 away from the massage head 1 is provided with an arc-shaped groove 208 that communicates with the end of the second spiral 5 in the connecting hole 204. The limiting protrusion 13 is preferably located at the end of the arc-shaped groove 208. There are two possible positions for the limiting protrusion 13 in the arc-shaped groove 208: the first is that the limiting protrusion 13 is spaced apart from the bottom sidewall of the end of the arc-shaped groove 208, thus forming a... In one configuration, the protrusion 11 is positioned in a storage space. When the massage head 1 is connected to the piston 3, the protrusion 11 moves to the end within the second spiral 5 and finally enters the arc-shaped groove 208, passing the limiting protrusion 13 and ending in the storage space. In another configuration, the limiting protrusion 13 is located on the bottom side wall of the end of the arc-shaped groove 208. When the massage head 1 is connected to the piston 3, the protrusion 11 moves to the end within the second spiral 5 and finally enters the arc-shaped groove 208, located between the limiting protrusion 13 and the side wall of the arc-shaped groove 208, and is fixed by an interference fit.

[0096] Example 8

[0097] like Figure 14-17 As shown, in this embodiment, the massage head assembly includes a massage head 1, a connecting part 2, and a piston 3. The piston is connected to the connecting rod 7 of the fascia gun. The connecting part 2 includes a first connecting part, a second connecting part, and a limiting member. The first connecting part includes a boss 201 and a first connecting post 202. The second connecting part includes a second connecting post 203. The limiting member includes an elastic fixing part 205 and an elastic abutting part 206. The connection method and structure of each component in this embodiment differ from those in Embodiment 1 only in that the first connecting post 202 is not provided with a first spiral 4, the connecting hole 204 is not provided with a second spiral, and the shapes of the first connecting post 202, the limiting groove 207, the elastic fixing part 205, and the connecting hole 204 are different, resulting in different connection relationships. All other aspects are the same. For details, please refer to Embodiment 1 above. For example, the connection structure of the connecting rod 7 and the piston 3 is the same.

[0098] Specifically, the first connecting post 202, the limiting groove 207, the elastic fixing part 205, and the connecting hole 204 are all mutually cooperating. In Embodiment 1, the first connecting post 202, the limiting groove 207, the elastic fixing part 205, and the connecting hole 204 are all cylindrical. However, in this embodiment, the first connecting post 202, the limiting groove 207, the elastic fixing part 205, and the connecting hole 204 can be set as a prism, a square prism, or a cross prism. The first connecting post 202 and the connecting hole 204 are also changed to directly insert the first connecting post 202 into the connecting hole 204.

[0099] Specifically, when the first connecting post 202, the limiting groove 207, the elastic fixing part 205, and the connecting hole 204 are configured as prisms, the prism can be a triangular prism, a square prism, or an octagonal prism, etc., and all sides of the prism are of equal length. For example... Figure 14 As shown, in this embodiment, the first connecting post 202, the limiting groove 207, the elastic fixing part 205, and the connecting hole 204 are all specifically designed as triangular prisms. The first connecting post 202 is designed as a triangular prism, and a triangular prism-shaped limiting groove 207 is provided on the outer wall of one end of the first connecting post 202 near the boss 201. The limiting groove 207 is provided at the connection between the boss 201 and the first connecting post 202 and has a certain axial width. The elastic fixing part 205 and the elastic abutment part 206 are both provided with triangular prism-shaped inner holes. When stationary, the limiting member is sleeved on the outer periphery of the limiting groove 207, and the limiting groove 207 restricts the limiting member on the first connecting post 202 to prevent the limiting member from falling off. The outer shape of the elastic fixing part 205 is designed as follows: The elastic fixing part 205 is shaped like a triangular prism. Its external dimensions are not less than those of the first connecting post 202 and are larger than those of the connecting hole 204. This allows the elastic fixing part 205 to be positioned between the first connecting post 202 and the connecting hole 204 when the piston 3 is connected to the massage head 1, forming an interference fit. This significantly enhances the surface friction between the first connecting post 202 and the connecting hole 204, allowing the massage head 1 to be firmly fixed in the connecting hole 204. More preferably, the top of the elastic fixing part 205 facing the connecting hole 204 can be appropriately designed as a chamfer or rounded corner, and / or the opening of the connecting hole 204 can be flared or chamfered or rounded, making it easier for the elastic fixing part 205 to be inserted into the connecting hole 204. More preferably, the error between the outer dimensions of the elastic fixing part 205 and the outer dimensions of the first connecting post 202, and the error between the outer dimensions of the elastic fixing part 205 and the dimensions of the connecting hole 204, are all no more than 0.1 cm. This error dimension setting can facilitate the elastic fixing part 205 to be inserted into the connecting hole 204 of the piston 3 and prevent the piston 3 from falling off.

[0100] Specifically, such as Figure 15As shown, when the first connecting post 202, the limiting groove 207, the elastic fixing part 205, and the connecting hole 204 are set as square posts, the four sides of the square post are of equal length. The first connecting post 202 is set as a square post, and a square post-shaped limiting groove 207 is provided on the outer wall of one end of the first connecting post 202 near the boss 201. The limiting groove 207 is set at the connection between the boss 201 and the first connecting post 202 and has a certain axial width. The elastic fixing part 205 and the elastic abutment part 206 are both provided with square post-shaped inner holes. When stationary, the limiting member is sleeved on the outer periphery of the limiting groove 207, and the limiting groove 207 restricts the limiting member on the first connecting post 202 to prevent the limiting member from falling off. The elastic fixing part 205 is set as a square post shape, and the external dimensions of the elastic fixing part 205 are not small. The outer dimensions of the first connecting post 202 are larger than the dimensions of the connecting hole 204. Therefore, when the piston 3 is connected to the massage head 1, the elastic fixing part 205 can be positioned between the first connecting post 202 and the connecting hole 204, forming an interference fit. This significantly enhances the surface friction between the first connecting post 202 and the connecting hole 204, firmly fixing the massage head 1 to the piston 3. More preferably, the top of the elastic fixing part 205 facing the connecting hole 204 can be appropriately designed with a chamfer or rounded corner, and / or the opening of the connecting hole 204 is flared or chamfered or rounded, making it easier for the elastic fixing part 205 to be inserted into the connecting hole 204. Even more preferably, the difference between the outer dimensions of the elastic fixing part 205 and the outer dimensions of the first connecting post 202, and the difference between the outer dimensions of the elastic fixing part 205 and the dimensions of the connecting hole 204, do not exceed 0.1 cm. This difference setting facilitates the insertion of the elastic fixing part 205 into the connecting hole 204 and prevents the first connecting post 202 from falling out.

[0101] Specifically, such as Figure 16-17As shown, when the first connecting post 202, the limiting groove 207, the elastic fixing part 205, and the connecting hole 204 are configured as a cross post, the length of segment a of the cross post is half the length of segment b, and the length of segment b is half the length of segment c. The first connecting post 202 is configured as a cross post, and a cross-shaped limiting groove 207 is provided on the outer wall of one end of the first connecting post 202 near the boss 201. The limiting groove 207 is located at the connection between the boss 201 and the first connecting post 202 and has a certain axial width. The elastic fixing part 205 and the elastic abutment part 206 both have cross-shaped inner holes. When stationary, the limiting member is sleeved on the outer periphery of the limiting groove 207, and the limiting groove 207 restricts the limiting member on the first connecting post 202 to prevent the limiting member from falling off. The outer shape of the elastic fixing part 205 is configured as a cross post, and the outer dimension of the elastic fixing part 205 is not less than that of the first connecting post 202. The external dimension of the connecting post 202 is larger than the dimension of the connecting hole 204, so that when the piston 3 is connected to the massage head 1, the elastic fixing part 205 can be located between the first connecting post 202 and the connecting hole 204, forming an interference fit. This significantly enhances the surface friction between the first connecting post 202 and the connecting hole 204 of the piston 3, firmly fixing the massage head 1 to the piston 3. More preferably, the top of the elastic fixing part 205 facing the connecting hole 204 can be appropriately designed as a chamfer or rounded corner, and / or the opening of the connecting hole 204 is flared or chamfered or rounded, making it easier for the elastic fixing part 205 to be inserted into the connecting hole 204. More preferably, the difference between the external dimension of the elastic fixing part 205 and the external dimension of the first connecting post 202, and the difference between the external dimension of the elastic fixing part 205 and the dimension of the connecting hole 204, do not exceed 0.1 cm. This difference setting facilitates the insertion of the elastic fixing part 205 into the connecting hole 204 of the piston 3 and prevents the piston 3 from falling out.

[0102] This utility model also discloses a fascia gun, such as Figure 18-21As shown, the fascia gun includes a main body and the massage head assembly described above. The main body includes a housing and a battery 22, a motor 23 and a drive mechanism disposed within the housing. The housing includes a head cover 19, a tail cover 31, an upper housing 17, a lower housing 18 and a handle housing 21. The upper housing 17 and the lower housing 18 form a main cavity. The handle housing 21 is integrally connected to the lower side wall of the lower housing 18 and has a handle cavity inside. The front end of the main cavity forms a first through hole and the rear end forms a second through hole. The head cover 19 is provided with a third through hole. The head cover 19 is connected to the first through hole, and the third through hole is coaxial with the first through hole. The upper end of the motor 23 is located in the main cavity, and the lower end of the motor 23 is located in the handle cavity. The output end of the motor 23 faces upward and is located in the main cavity. The output end of the motor 23 is connected to the drive assembly. The massage head assembly includes a massage head 1 and a connecting part 2. The main cavity is also provided with a piston 3, a shock absorption structure 15, and a drive mechanism. The drive mechanism includes a drive assembly and a connecting rod 7. The massage head 1 is located outside the head cover 19. The drive assembly is connected to one end of the connecting rod 7. The other end of the connecting rod 7 passes through the first through hole and is connected to the piston 3 located in the third through hole to perform reciprocating motion.

[0103] Specifically, such as Figure 22-31 The head cover 19 has an annular structure. The outer diameter of the front end of the head cover 19 is smaller than the outer diameter of the rear end, and the front end of the head cover 19 transitions to the rear end in an arc shape. A head cover connecting ring 181 is formed at the front end of the lower shell 18. An annular mounting groove 182 is formed at the front end of the head cover connecting ring 181. At least one head cover connecting hole 183 is provided on the annular mounting groove 182. At least one third connecting post 191 with internal threads is provided on the inner side wall of the rear end of the head cover 19. During connection, the rear end of the head cover 19 is inserted into the annular mounting groove 182 and then fixed by bolts. In order to facilitate the positioning and installation of the head cover 19, that is, the alignment of the head cover connecting hole 183 with the threaded hole, the outer diameter of the lower part of the head cover connecting ring 181 is larger than the outer diameter of the upper part, forming two external steps. The inner diameter of the lower part is larger than the inner diameter of the upper part, thus forming two internal steps. The outer side wall of the upper part of the rear end of the head cover 19... The outer diameter is smaller than the outer diameter of the lower outer wall, thus forming two steps. When the tail end of the head cover 19 is installed in the annular mounting groove 182, the two steps formed at the tail end of the head cover 19 correspond to and abut with the two internal steps formed at the upper and lower parts of the head cover connecting ring 181, thereby determining the installation position of the head cover 19. In order to facilitate the installation of the upper cover, an upper cover limiting groove 184 is provided at the steps formed at the upper and lower outer walls of the head cover connecting ring 181. Correspondingly, the inner diameter of the front end of the upper shell 17 is smaller than the inner diameter of the front end of the lower shell 18, but the outer diameters are equal. The lower side wall of the front end of the upper shell 17 is provided with a corresponding limiting post 171 that cooperates with the upper cover limiting groove 184. By inserting the limiting post 171 into the upper cover limiting groove 184, the upper shell 17 is installed on the upper part of the head cover connecting ring 181, thus achieving the cooperation and installation of the upper shell 17 and the lower shell 18.

[0104] An annular groove 192 is provided on the inner sidewall of the front end of the head cover 19. An annular boss 193 is provided at the front end of the annular groove 192. A radially and circumferentially distributed reinforcing plate 194 is formed between the annular groove 192 and the inner surface of the front end of the head cover 19 to increase the strength of the annular groove 192 and prevent deformation during operation. When the installation is completed, the shock-absorbing structure 15 is located in the annular groove 192. In order to reduce the wear between the shock-absorbing structure 15 in the massage component assembly and the groove wall of the annular groove 192, a wear-resistant ring 195 is provided in the annular groove 192. Part of the reinforcing plate 194 is provided with a fourth connecting post 196 with a threaded hole. In use, the fastener 197 is fixed on the fourth connecting post 196. One side of the wear-resistant ring 195 is fixed by the fastener 197, while the other side of the wear-resistant ring 195 is limited by the annular boss 193. Specifically, the fastener 197 can be a structure such as a large nut screw, and the wear-resistant ring 195 is fixed by the edge of the nut.

[0105] It should be noted that during installation, the front side of the wear-resistant ring 195 should first be abutted against the inner surface of the annular boss 193 at the front end of the head cover 19. Then, the wear-resistant ring 195 should be fixed in the annular groove 192 using fasteners 197. Subsequently, the rear end of the head cover 19 and the boss of the head cover connecting ring 181 should be aligned and initially fixed. Fasteners 197 should be driven into the threaded hole of the third connecting post 191 from the head cover connecting hole 183 inside the body to fix the head cover 19. Then, the limiting post 171 with a protruding setting at the bottom of the front end of the upper housing 17 should be inserted into the upper cover limiting groove 184 to achieve the snap-fit ​​between the upper housing 17 and the lower housing 18.

[0106] Specifically, the lower housing 18 also includes at least one second mounting groove 185 on its outer surface. The second mounting groove 185 has a lower connecting hole 1863 that penetrates the lower housing 18. A lower connecting post 186 extending vertically upwards is provided on the inner surface of the lower housing 18 corresponding to the lower connecting hole 1863, and the lower connecting hole 1863 extends through the lower connecting post 186. A connecting groove 1862 coaxial with the lower connecting hole 1863 is provided on the end sidewall of the lower connecting post 1862. The end sidewall of the connecting groove 1862 extends outwards to form a mounting wall 1861, and the inner diameter of the mounting wall 1861 gradually increases from the inside to the outside, forming a tapered hole. Correspondingly, the upper housing 17 extends vertically downwards from its inner surface to form an upper connecting post 172 with an upper connecting hole. The number of upper connecting posts 172 and the number of lower connecting posts 186 are... Correspondingly, the outer diameter of the upper connecting post 172 is slightly smaller than the inner diameter of the connecting groove 1862, so that during installation, the end of the upper connecting post 172 can be embedded inside the connecting groove 1862 and abut against the bottom wall of the connecting groove 1862. The upper connecting hole is a screw hole. When the upper housing 17 and the lower housing 18 are connected, the bolt is inserted from the second mounting groove 185 of the lower housing 18 to the lower connecting hole 1863 to the upper connecting hole, thereby connecting the upper housing 17 and the lower housing 18 together. After the upper housing 17 and the lower housing 18 are connected, the second mounting groove 185 can be sealed with a sealing plug, which can play a role in waterproofing, dustproofing and protection. Moreover, for better connection, the sum of the lengths of the upper connecting post 172 and the lower connecting post 186 should be appropriate, so that the housing can fit perfectly when connected, and achieve limiting and pre-fixing during installation.

[0107] Furthermore, the upper housing 17 has a continuous or segmented sealing edge 173 at the connection with the lower housing 18, and the lower housing 18 has a sealing groove 187 corresponding to the sealing edge 173 at the connection with the upper housing 17. In other embodiments, the upper housing 17 has a continuous or segmented sealing groove 187 at the connection with the lower housing 18, and the lower housing 18 has a sealing edge 173 corresponding to the sealing groove 187 at the connection with the upper housing 17. When the two housing parts are installed, the sealing edge 173 can be embedded in the sealing groove 187 of the other housing, thereby achieving a seal. These two structures also enable pre-fixing and pre-sizing before screw fixing. In other embodiments, the sealing groove 187 and the sealing edge 173 can also be stepped to further increase the sealing performance.

[0108] The upper housing 17 protrudes above the motor 23 to form a hump 20. The entire hump 20 is located in front of the vertical line at the end of the handle housing 21. In the side view of this fascia gun, the upper housing of the entire fascia gun has three steps: the zero step at the head cover 19, the second step where the hump 20 is located, and the first step at the upper surface of the upper housing 17 between the head cover 19 and the hump 20. The diameter of the housing increases progressively from the zero step, the first step, and the second step. The hump 20 extends from the connection between the first step and the second step towards the tail end of the fascia gun, forming a peak in the middle. Specifically, the side of the peak facing the front end of the fascia gun is the front slope, and the other side is the rear slope. The slope of the front slope is slightly gentler than that of the rear slope, and the entire hump 20 is located in front of the vertical line at the end of the handle housing 21. The connection between the front slope and the rear slope is arc-shaped. The front slope of the hump 20 has multiple transverse heat dissipation holes 2001 sequentially formed along the projection line of the transverse axis of the main cavity onto the front slope. To prevent deformation of the transverse heat dissipation holes 2001 during use, several semi-annular grooves 2003 are provided on the outer periphery of the transverse heat dissipation holes 2001 to increase their service life. Furthermore, the rear slope has multiple longitudinal heat dissipation holes 2002 formed along the projection line perpendicular to the transverse axis of the main cavity onto the rear slope. The longitudinal heat dissipation holes are symmetrically arranged with the transverse axis of the main cavity as the central axis. The transverse heat dissipation holes 2001 and longitudinal heat dissipation holes 2002 constitute a heat dissipation structure. In this fascia gun, the distance from the outer surface of the upper shell 17 to the transverse axis of the main cavity is C, and D, where C is 4.32 times D. During operation, the fascia gun generates a large amount of heat within the main cavity, causing hot air to rise. The shape and height of the hump 20 facilitate the accumulation of hot air, and the heat dissipation holes formed according to the above method have higher heat dissipation efficiency.

[0109] Specifically, the handle housing 21 has a handle cavity, and the battery 22 is located entirely within the handle cavity, specifically at the bottom of the handle cavity. The inner surface of the handle cavity has multiple fixing plates 2111 extending toward the battery 22. In this embodiment, the battery 22, viewed from the bottom, is a triangular battery pack with rounded corners on three sides, formed by binding together three batteries. There are three fixing plates 2111, each abutting near the midline of the three sides of the battery 22. A battery support base 2112 is provided between every two adjacent fixing plates 2111. The three battery support bases 2112 are respectively used to abut at the three rounded corners of the bottom of the battery 22. The bottom of the fixing plate 2111 is not lower than the plane of the support base and not higher than the plane of the lower surface of the motor 23.

[0110] Specifically, the lower part of the motor 23 is located inside the handle cavity and above the battery 22, while the upper part is located inside the main cavity. A motor fixing plate 24 for fixing the upper end of the motor 23 is provided within the main cavity. The motor fixing plate 24 has fixing holes, and a fixing post extends upward from the bottom side wall of the lower housing 18. The fixing holes of the motor fixing plate 24 are fitted onto the fixing post. The upper end of the battery 22 is fixed to the motor fixing plate 24 with bolts. In this embodiment, the distance from the mounting plane of the motor 23 (the plane where the motor fixing plate 24 is located) to the lower surface of the main cavity is E, and the distance from the lower surface of the motor 23 to the upper surface of the handle cavity is F. It can be seen that the ratio of the portion of the motor 23 extending beyond the handle cavity to the portion located within the handle cavity is approximately 1 / 4, i.e., the ratio of E to F is approximately 1 / 4. Preferably, during installation, the center lines of the battery 22 and the motor 23 are collinear, which helps reduce vibration during fascia gun operation. Furthermore, since the lower end face of the motor 23 has output wires, which have contacts and are prone to detachment, an L-shaped insulating sleeve 25 is provided on the lower end face of the battery 22 to protect them and provide insulation. To improve the stability of the battery 22, a shock-absorbing component 26 is also provided in the gap between the battery 22 and the motor 23, such as... Figure 32 As shown, the shock absorber 26 has a hollow interior with a through hole at its center. A raised edge surrounds the through hole to enhance its stability. The through hole allows the protrusion at the bottom of the motor 23 to pass through. The bottom edge of the shock absorber 26 is recessed inward to form a clearance groove 2611, which allows space for the fixing plate 2111 of the battery 22 to be fixed below, preventing collision between the fixing plate 2111 and the bottom of the shock absorber 26 during use. Furthermore, to facilitate the accommodation of the insulating sleeve 25, a through-hole accommodating groove 2612 is provided inside the shock absorber 26. The outer raised edge of the shock absorber 26 has a notch, which is a wire groove 2613, facilitating the passage of wires and making the wire harness neater. In another embodiment, the shock absorber 26 can be made of sponge.

[0111] Specifically, the drive assembly includes an eccentric wheel 27. The upper surface of the motor mounting plate 24 is provided with a drive groove 2411 for mounting the eccentric wheel 27. The output shaft of the motor 23 passes through the motor mounting plate 24 and connects to the eccentric wheel 27 in the drive groove 2411. The end of the connecting rod 7 in the massage head assembly away from the massage head 1 is provided with a drive hole. A bearing 28 is provided in the drive hole. The bearing 28 is connected to the output shaft at the upper end of the eccentric wheel 27, thus forming a complete transmission system. That is, the motor 23 drives the eccentric wheel 27, the eccentric wheel 27 drives the connecting rod 7 through the bearing 28, and the connecting rod 7 drives the piston 3 to slide in the annular groove 192. At the same time, the shock absorption structure 15 plays a corresponding shock absorption role.

[0112] An annular flange 29 extends from the tail end formed by the upper housing 17 and the lower housing 18. The tail cover 31 is sleeved on the outside of the annular flange 29, and the inner wall of the annular flange 29 is provided with a tail cover 31 connecting post with a threaded hole. Correspondingly, the outer wall of the tail cover 31 is provided with a tail cover connecting hole that corresponds to the threaded hole in the tail cover connecting post. The tail cover 31 is connected to the annular flange 29 by bolts. Furthermore, an upper baffle 175 extends inward from the inner wall of the tail end of the upper housing 17, and a lower baffle 188 extends inward from the inner wall of the tail end of the lower housing 18. The baffles formed by the upper baffle 175 and the lower baffle 188 can separate the two cavities, preventing external debris or wires from entering the cavity where the transmission structure is located, thus preventing malfunctions. After the upper housing 17 and the lower housing 18 are connected, a baffle is formed between the upper baffle 175 and the lower baffle 188 and has a wire hole. The display control board 30 is installed in the space between the baffle and the tail cover 31. The wire hole facilitates the electrical connection between the display control board 30 and components such as the battery 22 in the main body. Moreover, the baffle can restrict the display control board 30 to be located inside the tail cover 31.

[0113] Furthermore, a display panel 32 is provided on the outer casing. This display panel 32 can be a logo plate or an electronic display screen, used to display parameters such as temperature and rotation speed, allowing the user to understand the usage status. Specifically, a display structure mounting groove 174 is provided at the junction of the upper casing 17 and the lower casing 18. The display structure mounting groove 174 is located directly above the handle casing 21. The upper wall of the display structure mounting groove 174 has axially distributed mounting protrusions, forming a groove for mounting the display panel between the mounting protrusions and the bottom wall of the display structure mounting groove 174. Correspondingly, the display panel 32 also has a corresponding protrusion. During installation, simply align the display panel 32 with the corresponding protrusion. The corresponding protruding edge is snapped into the groove. Since the display structure mounting groove 174 is composed of the upper housing 17 and the lower housing 18, that is, half of the display structure mounting groove 174 is located on the lower housing 18 and half is located on the upper housing 17. First, install the display plate 32 in the display structure mounting groove 174 of the lower housing 18, and then install the upper housing 17. The protruding edge of the display plate 32 can then be snapped into the groove. In order to ensure the stability of the connection, a sealing ring can be set at the connection between the display plate 32 and the display structure mounting groove 174 to enhance the sealing of the connection. It can also be fixed by one or more methods such as adhesive or snap-fit ​​to better ensure the sealing of the connection.

[0114] The connection between the lower housing 18 and the handle housing 21 of the fascia gun is designed with an arc-shaped structure 33, which can reduce the residue of dirt on the outer housing, increase aesthetics, and improve grip. Below the arc-shaped structure 33, there is also a polygonal area with a polygonal protrusion structure. The ends of the protrusions are chamfered or rounded, increasing safety and improving hand grip. Preferably, the arc-shaped structure 33 can be made of a sweat-absorbing and shock-absorbing material. The internal space of the arc-shaped structure 33 can be used to accommodate part of the motor 23.

[0115] Specifically, such as Figures 33-34 As shown, the bottom of the handle shell 21 is provided with a bottom cover structure 34, which includes a charging cover 3411 and a charging plate 3412. The battery 22 is completely located inside the handle shell 21. The charging plate 3412 and the charging cover 3411 are located at the bottom of the handle shell 21. The bottom of the handle shell 21 of the lower housing 18 is provided with a charging plate mounting groove. The charging plate mounting groove is provided with a charging plate mounting post 2113. The charging plate mounting post 2113 is located behind the battery support base 2112. The top of the charging plate mounting post 2113 is provided with a third mounting hole. At the same time, the outer surface of the top of the third mounting hole is also provided with a step. The step is used to abut against the charging plate 3412. The charging plate 3412 is electrically connected to the battery 22, the display control board 30, and the motor 23. 2. It also has a charging port and a main switch, which protrude outwards. In addition, the charging plate 3412 is provided with a mounting through hole corresponding to the charging plate mounting post 2113. This through hole allows the charging plate 3412 to extend into the charging plate mounting post 2113 and to abut against the step of the charging plate mounting post 2113. The outer and inner diameters of the charging cover 3411 are the same as the outer and inner diameters of the handle shell 21, and it has a through hole corresponding to the charging port and the main switch to accommodate the component. The charging cover 3411 should also have a mounting through hole corresponding to the charging plate mounting post 2113. During installation, the fastener 197 is passed through the mounting through hole of the charging cover 3411, the mounting through hole of the charging plate 3412 and the third mounting hole respectively to complete the fixation of the structure. Preferably, a stepped structure can be provided at the connection between the handle shell 21 and / or the charging cover 3411 near each other to enhance sealing and waterproofing.

[0116] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A fascia gun, comprising a main body and a massage head assembly, said main body comprising a main housing, a battery, a motor, and a drive mechanism, characterized in that, The main housing includes a horizontally arranged main cavity and a handle cavity arranged at an angle to the main cavity. The battery and the motor are electrically connected and located in the handle cavity. The motor is located above the battery and partially extends beyond the handle cavity. The massage head assembly includes a massage head, a connecting part, and a piston connected to the drive mechanism. The connecting part includes a first connecting part and a second connecting part. The second connecting part has a connecting hole for the first connecting part to enter. One of the first connecting part and the second connecting part is fixed to the massage head, and the other is fixed to the piston. The first connecting part is provided with a first spiral, and the connecting hole is provided with a second spiral that cooperates with the first spiral. The massage head and the piston are detachably connected by rotational connection of the second spiral and the first spiral.

2. The fascia gun according to claim 1, characterized in that, It also includes a limiting member, which includes an elastic fixing part; the elastic fixing part is disposed between the first connecting part and the connecting hole, so that the first connecting part is interference-fitted with the connecting hole and / or the second spiral.

3. The fascia gun according to claim 1, characterized in that, The motor and the battery are coaxially distributed.

4. The fascia gun according to claim 1, characterized in that, The ratio of the portion of the motor extending beyond the handle cavity to the portion located within the handle cavity is 1 / 4.

5. The fascia gun according to any one of claims 1-4, characterized in that, A shock-absorbing component is provided in the gap between the battery and the motor.

6. The fascia gun according to claim 5, characterized in that, The shock absorber has a hollow interior. The top of the shock absorber has a through hole for the protrusion at the bottom of the motor to pass through, and the bottom of the shock absorber has an inwardly recessed clearance groove, which provides space for the battery mounting structure.

7. The fascia gun according to claim 6, characterized in that, An insulating sleeve is provided at the bottom of the motor, and the shock absorber is provided with a receiving groove to accommodate the insulating sleeve; the shock absorber is also provided with a wire groove for the wire to pass through.

8. The fascia gun according to any one of claims 1-4, characterized in that, The inner surface of the handle cavity has a plurality of fixing plates extending toward the battery, each of the fixing plates abutting against the battery.

9. The fascia gun according to claim 8, characterized in that, Both the fixing plate and the battery are arranged along the length of the handle cavity, and the battery adopts a triangular battery pack. There are 3 fixing plates, and each fixing plate is respectively abutted against the center line of each side of the battery along the length of the handle cavity.

10. The fascia gun according to claim 9, characterized in that, A battery support base is fixed inside the handle cavity, and the battery support base abuts against the bottom of the battery.

11. The fascia gun according to claim 10, characterized in that, Multiple battery support bases are provided, and the battery support bases and the fixing plate are staggered along the circumference of the handle cavity.

12. The fascia gun according to any one of claims 1-4, characterized in that, The main cavity is composed of the internal space of the upper shell, which includes an upper half shell that is distributed in a multi-level stepped manner.

13. The fascia gun according to claim 12, characterized in that, The upper shell is arranged in three steps, including the zero step where the fascia gun head cap is located, the second step where the hump is located, and the first step where the upper surface of the upper shell is located between the head cap and the hump. The shell diameter of the zero step, the first step and the second step increases progressively.

14. The fascia gun according to claim 13, characterized in that, The hump has heat dissipation holes. The distance between the first-level step and the transverse axis of the main cavity is C, and the distance between the second-level step and the first-level step is D. C is 4.32 times D.

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