Compact reciprocating power mechanism and massager thereof

Abstract

The utility model relates to the technical field of massagers, in particular to a compact reciprocating power mechanism and a massager thereof. Comprising a reciprocating working head and a crank connecting rod power mechanism in transmission connection with the reciprocating working head, the crank connecting rod power mechanism comprises a fixed base plate, a motor mounting seat arranged at the lower end of the fixed base plate, a power motor fixedly mounted on the motor mounting seat, a power synchronizing wheel in power connection with the power motor, and a first speed reduction synchronizing wheel rotationally connected to the lower end of the fixed base plate; the first speed reduction synchronizing wheel is arranged on the fixed base plate, the second speed reduction synchronizing wheel is arranged on the fixed base plate and coaxially connected with the first speed reduction synchronizing wheel, the crank synchronizing wheel is rotationally connected to the upper end of the fixed base plate, and the first synchronous belt is arranged between the power synchronizing wheel and the first speed reduction synchronizing wheel in a sleeving mode. And the crank synchronizing wheel can have higher power to drive the connecting rod to act, so that the power of the reciprocating working head can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of massagers, in particular to a compact reciprocating power mechanism and a massager thereof. Background Art

[0002] With the continuous economic development and social progress, people are increasingly valuing health. Traditional medicine demonstrates that massage, as a highly meaningful health activity, is widely favored. Given the excellent results achieved with massage devices, a wide variety of massagers have emerged on the market. Traditionally, massages have typically been performed with manual instruments, repeatedly applying pressure to acupuncture points or other body parts. However, this method can easily lead to hand fatigue and soreness during prolonged massage. This has led to the development of electrically powered massagers.

[0003] The core components of the internal power mechanism of existing massagers primarily consist of a motor and a crank-connecting rod mechanism driven by the motor. This crank-connecting rod mechanism is connected to a massage head mounted on the massager, which is driven by the motor to reciprocate. When the massage head acts on acupuncture points or muscles on the body, a massage function is achieved. To generate more powerful power, the motor and crank-connecting rod mechanism are typically connected via a synchronous pulley mechanism. Specifically, the motor shaft is connected to a synchronous pulley with a smaller number of teeth, while the crank-connecting rod mechanism is equipped with a synchronous pulley with a larger number of teeth. This achieves both speed reduction and increased force. However, this conventional synchronous pulley mechanism only provides a single deceleration effect. If the difference in the number of teeth between the two synchronous pulleys is too large, the synchronous belt often slips. If the difference in the number of teeth between the two synchronous pulleys is too small, the effective speed reduction and force increase effect cannot be achieved. Therefore, an improved technical solution is urgently needed to address these challenges. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0005] A compact reciprocating power mechanism includes a reciprocating working head and a crank-connecting rod power mechanism that is transmission-connected to the reciprocating working head. The crank-connecting rod power mechanism includes a fixed base plate, a motor mounting seat arranged at the lower end of the fixed base plate, a power motor fixedly mounted on the motor mounting seat, a power synchronous wheel connected to the power motor, a first reduction synchronous wheel rotatably connected to the lower end of the fixed base plate, a second reduction synchronous wheel arranged on the fixed base plate and coaxially connected to the first reduction synchronous wheel, a crank synchronous wheel rotatably connected to the upper end of the fixed base plate, a first synchronous belt sleeved between the power synchronous wheel and the first reduction synchronous wheel, a second synchronous belt sleeved on the second reduction synchronous wheel and the crank synchronous wheel, and a connecting rod rotatably connected to the crank synchronous wheel, wherein one end of the connecting rod is eccentrically connected to the crank synchronous wheel, and the other end of the connecting rod is rotationally connected to the reciprocating working head.

[0006] Preferably, the number of teeth of the power synchronous wheel is smaller than that of the first reduction synchronous wheel, the number of teeth of the first reduction synchronous wheel is larger than that of the second reduction synchronous wheel, and the number of teeth of the second reduction synchronous wheel is smaller than that of the crank synchronous wheel.

[0007] Preferably, a connecting column is connected between the fixed base plate and the motor mounting seat, and the fixed base plate and the motor mounting seat are separated by the connecting column spacing to form a space that can accommodate the power synchronous wheel. The power motor is installed at the lower end of the motor mounting seat, and the power motor has a motor shaft that passes through the motor mounting seat and is axially connected to the power synchronous wheel.

[0008] Preferably, a connecting shaft is provided through the fixed base plate, and the first reduction synchronous wheel and the second reduction synchronous wheel are coaxially connected via the connecting shaft.

[0009] Preferably, a shaft sleeve is formed on the first reduction synchronous wheel, the connecting shaft is fixedly connected in the shaft sleeve, the outside of the shaft sleeve is connected with a bearing, and the first reduction synchronous wheel is rotatably connected to the fixed base plate through the bearing.

[0010] Preferably, a through hole is provided on the fixed base plate, and a receiving groove matching the bearing is formed along the through hole at the lower end of the fixed base plate, the bearing is arranged in the receiving groove, and a fixing ring is fixedly installed on the through hole to constrain the bearing in the receiving groove.

[0011] Preferably, an eccentric portion is formed on the crank synchronous wheel, and a crank shaft is provided on the eccentric portion, and the connecting rod is rotatably connected to the crank shaft.

[0012] A massager includes the compact reciprocating power mechanism described above, as well as a main body shell and a massage head. The reciprocating working head has a fixed end and a sliding end that slides along the fixed end. The massage head is connected to the sliding end. The connecting rod is rotatably connected to the sliding end. The fixed end and the fixed base plate are both fixedly mounted inside the main body shell, and the massage head extends outside the main body shell.

[0013] Preferably, the front end of the main shell is provided with an opening for the massage head to extend out, the fixed end includes a connecting plate fixedly installed at the opening position, a first guide rod connected between the connecting plate and the fixed base plate, and a second guide rod connected between the connecting plate and the inside of the main shell, the first guide rod and the second guide rod cooperate with each other in parallel, the sliding end is slidably connected to the first guide rod and the second guide rod, and the sliding end is provided with multiple connecting rods that guide and pass through the connecting plate, and the massage head is connected to the ends of the multiple connecting rods.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] By adopting a laminated structure to set up a two-layer synchronous pulley mechanism, the power synchronous pulley, the first reduction synchronous pulley and the first synchronous belt are used as the first layer synchronous pulley mechanism, and the second reduction synchronous pulley, the crank synchronous pulley and the second synchronous belt are used as the second layer synchronous pulley mechanism. The first layer synchronous pulley mechanism and the second layer synchronous pulley mechanism are axially connected through the first reduction synchronous pulley and the second reduction synchronous pulley, so that when the electric motor drives the power synchronous pulley to rotate, the power synchronous pulley drives the first reduction synchronous pulley to rotate through the first synchronous belt, thereby achieving the purpose of one deceleration, and the first reduction synchronous pulley drives the second reduction synchronous pulley, and the crank synchronous pulley is driven to rotate by the second synchronous belt through the second reduction synchronous pulley, thereby achieving the purpose of the second deceleration. In this way, the effect of increasing the force on the connecting rod by deceleration can be met to a greater extent, so that the crank synchronous pulley can have higher power to drive the connecting rod to move, thereby improving the power of the reciprocating working head.

[0016] The first and second synchronous pulley mechanisms are respectively arranged at the upper and lower positions of a fixed base plate, which can greatly improve the compactness of the overall arrangement, thereby meeting the small space requirements of some massage equipment to accommodate the higher-powered compact reciprocating power mechanism.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 It is a structural diagram of the compact reciprocating power mechanism in the utility model;

[0020] Figure 2 This is a perspective structural diagram of the crank-connecting rod power mechanism in the utility model;

[0021] Figure 3 This is a structural schematic diagram of the crank-connecting rod power mechanism in the present invention from another perspective;

[0022] Figure 4 This is a schematic diagram of the exploded structure of the crank-connecting rod power mechanism in the utility model;

[0023] Figure 5 It is a structural schematic diagram of a cross section of the crank-connecting rod power mechanism of the present invention along the positions of the first reduction synchronous wheel and the second reduction synchronous wheel;

[0024] Figure 6 It is a structural diagram of the massager in the utility model;

[0025] Figure 7 This is a schematic diagram of the structure of the massager of the present invention after removing part of the main shell;

[0026] Figure 8 It is a structural schematic diagram of the reciprocating working head and the fixed base plate in the utility model.

[0027] The reference numerals and names in the figures are as follows:

[0028] Reciprocating working head 10, fixed end 11, connecting plate 111, first guide rod 112, second guide rod 113, sliding end 12, connecting rod 13, crank-connecting rod power mechanism 20, fixed base plate 21, motor mounting seat 22, power motor 23, power synchronous wheel 24, first reduction synchronous wheel 25, second reduction synchronous wheel 26, crank synchronous wheel 27, first synchronous belt 28, second synchronous belt 29, connecting rod 30, connecting column 31, connecting shaft 32, sleeve 33, bearing 34, accommodating groove 35, fixing ring 36, eccentric part 37, crank shaft 38, main body shell 40, massage head 41. DETAILED DESCRIPTION

[0029] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1-5In the embodiment of the present invention, a compact reciprocating power mechanism includes a reciprocating working head 10 and a crank-connecting rod power mechanism 20 connected to the reciprocating working head 10, the crank-connecting rod power mechanism 20 includes a fixed base plate 21, a motor mounting seat 22 provided at the lower end of the fixed base plate 21, a power motor 23 fixedly mounted on the motor mounting seat 22, a power synchronous wheel 24 connected to the power motor 23, a first reduction synchronous wheel 25 rotatably connected to the lower end of the fixed base plate 21, a motor mounting seat 22 provided at the lower end of the fixed base plate 21, a power motor 23 fixedly mounted on the motor mounting seat 22, a power synchronous wheel 24 connected to the power motor 23, a first reduction synchronous wheel 25 rotatably connected to the lower end of the fixed base plate 21, a motor mounting seat 22 provided at the lower end of the fixed base plate 21, a motor mounting seat 22 fixedly mounted on the motor mounting seat 22, a power synchronous wheel 24 connected to the power motor 23, a motor mounting seat 2 ... A second reduction synchronous wheel 26 coaxially connected to the first reduction synchronous wheel 25, a crank synchronous wheel 27 rotatably connected to the upper end of the fixed base plate 21, a first synchronous belt 28 sleeved between the power synchronous wheel 24 and the first reduction synchronous wheel 25, a second synchronous belt 29 sleeved on the second reduction synchronous wheel 26 and the crank synchronous wheel 27, and a connecting rod 30 rotatably connected to the crank synchronous wheel 27, wherein one end of the connecting rod 30 is eccentrically connected to the crank synchronous wheel 27, and the other end of the connecting rod 30 is rotatably connected to the reciprocating working head 10.

[0031] By adopting a laminated structure to set up a two-layer synchronous pulley mechanism, the power synchronous pulley 24, the first reduction synchronous pulley 25 and the first synchronous belt 28 are used as the first layer synchronous pulley mechanism, and the second reduction synchronous pulley 26, the crank synchronous pulley 27 and the second synchronous belt 29 are used as the second layer synchronous pulley mechanism. The first layer synchronous pulley mechanism and the second layer synchronous pulley mechanism are axially connected through the first reduction synchronous pulley 25 and the second reduction synchronous pulley 26, so that when the electric motor drives the power synchronous pulley 24 to rotate, the power synchronous pulley 24 drives the first reduction synchronous pulley 25 to rotate through the first synchronous belt 28, thereby achieving the purpose of one deceleration, and the second layer synchronous pulley mechanism is axially connected through the first reduction synchronous pulley 25 and the second reduction synchronous pulley 26. A reduction synchronous wheel 25 drives a second reduction synchronous wheel 26, which in turn drives a crank synchronous wheel 27 to rotate via a second synchronous belt 29, thereby achieving the purpose of a second deceleration. In this way, the effect of deceleration on increasing the force on the connecting rod 30 can be met to a greater extent, so that the crank synchronous wheel 27 can have a higher power to drive the connecting rod 30 to move, thereby increasing the power of the reciprocating working head 10. For example, in massage equipment with a high massage intensity requirement, this high-powered reciprocating working head 10 can stimulate muscles more deeply, relieve fatigue and tension, and provide a more effective massage experience. Moreover, this multi-layer deceleration design can make the power output more stable and reduce the adverse effects of excessive instantaneous impact on the equipment and the human body.

[0032] Furthermore, by disposing the first and second synchronous pulley mechanisms above and below the fixed base plate 21, the overall configuration is significantly more compact, thereby accommodating the compact, higher-powered reciprocating mechanism in the limited space of some massage devices. For example, in space-constrained devices such as portable massagers, the compact design makes the device more lightweight and portable, making it convenient for users to use anytime, anywhere. Furthermore, the compact structure helps reduce the production cost of the device, improve production efficiency, and enhance the product's market competitiveness.

[0033] Please refer to Figure 1-4 In the embodiment of the present invention, it is further proposed that the number of teeth of the power synchronous wheel 24 is smaller than the number of teeth of the first reduction synchronous wheel 25, the number of teeth of the first reduction synchronous wheel 25 is greater than the number of teeth of the second reduction synchronous wheel 26, and the number of teeth of the second reduction synchronous wheel 26 is smaller than the number of teeth of the crank synchronous wheel 27; when the power motor 23 is started, it drives the power synchronous wheel 24 with the smaller number of teeth to rotate. Since the number of teeth of the power synchronous wheel 24 is smaller than that of the first reduction synchronous wheel 25, the first deceleration is achieved and the torque is increased through the transmission of the first synchronous belt 28. When the first reduction synchronous wheel 25 rotates, it drives the second reduction synchronous wheel 26 with the smaller number of teeth coaxial with it to rotate, and then, Transmission is then transmitted through a second synchronous belt 29. The second reduction synchronous wheel 26 with a smaller number of teeth drives the crank synchronous wheel 27 with a larger number of teeth to rotate, further reducing speed and further increasing torque. Ultimately, the crank synchronous wheel 27 drives the connecting rod 30, causing the reciprocating working head 10 to reciprocate. This limited number of teeth makes the deceleration process smoother and more effective. In massage equipment, it can ensure uniform output of massage force and avoid sudden changes in force causing discomfort to the user. It also greatly increases torque, allowing the reciprocating working head 10 to obtain sufficient power to provide a strong massage effect when treating areas requiring greater massage force. In addition, due to the multiple effective deceleration and torque increase, the power requirement of the power motor 23 is reduced, allowing the selection of a smaller, more energy-efficient motor, reducing costs and energy consumption. The specific size relationship of the number of teeth on each synchronous wheel further optimizes the compactness of the entire mechanism. For example, in the case of a small massager, it can achieve more powerful functions within a limited space, making it easy to carry and use.

[0034] Please refer to Figure 3-4In the embodiment of the present invention, it is further proposed that a connecting column 31 is connected between the fixed base plate 21 and the motor mounting seat 22. The fixed base plate 21 and the motor mounting seat 22 are separated by the connecting column 31 to form a space capable of accommodating the power synchronous wheel 24. The power motor 23 is mounted at the lower end of the motor mounting seat 22. The power motor 23 has a motor shaft that passes through the motor mounting seat 22 and is axially connected to the power synchronous wheel 24. Since the fixed base plate 21 and the motor mounting seat 22 are separated by the connecting column 31, a space for accommodating the power synchronous wheel 24 is formed, which provides sufficient space for the rotation of the power synchronous wheel 24 and avoids interference with other components. This structural design makes the installation of the power motor 23 more stable, reduces the vibration and noise of the motor during operation, and can maintain smooth operation when the massage device works for a long time without affecting the user experience; the space separated by the connecting column 31 effectively accommodates the power synchronous wheel 24, ensuring the smooth operation of the transmission system, reducing the jamming or friction loss caused by insufficient space, and extending the service life of the synchronous wheel and transmission belt in massage equipment used frequently; enhancing the compactness and integrity of the entire mechanism, thereby achieving a reasonable layout in a limited space, making the equipment more miniaturized and lightweight, and suitable for more application scenarios with space requirements.

[0035] Please refer to Figure 4-5 In the embodiment of the utility model, it is further proposed that a connecting shaft 32 is provided on the fixed base plate 21, and the first reduction synchronous wheel 25 and the second reduction synchronous wheel 26 are coaxially connected through the connecting shaft 32, providing a stable coaxial connection support for the first reduction synchronous wheel 25 and the second reduction synchronous wheel 26, ensuring the synchronous rotation of the first reduction synchronous wheel 25 and the second reduction synchronous wheel 26, and improving the accuracy and stability of the transmission; the support of the connecting shaft 32 reduces the shaking and offset of the two synchronous wheels when rotating at high speed, and reduces the wear and energy loss caused by asynchronous or eccentric rotation; this coaxial connection method simplifies the transmission structure, improves space utilization, and makes the entire mechanism more compact.

[0036] The first reduction synchronous wheel 25 is formed with a sleeve 33, in which the connecting shaft 32 is fixedly connected. A bearing 34 is connected to the outside of the sleeve 33. The first reduction synchronous wheel 25 is rotatably connected to the fixed base plate 21 via the bearing 34. The sleeve 33 formed on the first reduction synchronous wheel 25 provides a fixed position for the connecting shaft 32. The connecting shaft 32 is firmly connected to the sleeve 33, ensuring the accuracy of power transmission. The bearing 34 connected to the outside of the sleeve 33 enables the first reduction synchronous wheel 25 to rotate smoothly relative to the fixed base plate 21. When power is transmitted to the first reduction synchronous wheel 25, it can rotate stably and with low friction under the support of the bearing 34, thereby achieving efficient reduction transmission. The presence of the bearing 34 greatly reduces the frictional resistance of the first reduction synchronous wheel 25 during rotation, improving energy transmission efficiency and reducing energy consumption. It also reduces wear between the first reduction synchronous wheel 25 and the fixed base plate 21, extending the service life of the components.

[0037] A through-hole is provided on the fixed base plate 21, and a receiving groove 35 matching the bearing 34 is formed along the through-hole at the lower end of the fixed base plate 21. The bearing 34 is arranged in the receiving groove 35, and a fixing ring 36 is fixedly installed on the through-hole to restrain the bearing 34 in the receiving groove 35; the through-hole on the fixed base plate 21 provides an installation channel for the connecting shaft 32 and the bearing 34, and the receiving groove 35 formed at the through-hole provides an accurate installation position for the bearing 34, so that the bearing 34 can be stably embedded therein. The fixing ring 36 is installed on the through-hole to firmly restrain the bearing 34 in the receiving groove 35 to prevent the bearing 34 from being displaced or falling off during operation. When the first reduction synchronous wheel 25 rotates, the bearing 34 operates stably in the receiving groove 35, ensuring smooth transmission.

[0038] Please refer to Figure 1-4 In the embodiment of the present invention, it is further proposed that an eccentric portion 37 is formed on the crank synchronous wheel 27, and a crank shaft 38 is provided on the eccentric portion 37, and the connecting rod 30 is rotatably connected to the crank shaft 38; when the crank synchronous wheel 27 rotates, the eccentric portion 37 formed thereon and the crank shaft 38 provided thereon deviate from the center of the crank synchronous wheel 27, thereby causing the crank shaft 38 to produce eccentric motion; the connecting rod 30 is rotatably connected to the crank shaft 38, converting this eccentric motion into reciprocating motion of the connecting rod 30, and finally realizing the reciprocating action of the reciprocating working head 10.

[0039] Please refer to Figure 6-8In an embodiment of the present invention, a massager is further provided, comprising the compact reciprocating power mechanism described above, a main body housing 40, and a massage head 41. The reciprocating work head 10 has a fixed end 11 and a sliding end 12 that slides along the fixed end 11. The massage head 41 is connected to the sliding end 12, and a connecting rod 30 is rotatably connected to the sliding end 12. The fixed end 11 and the fixed base plate 21 are both fixedly mounted within the main body housing 40, while the massage head 41 extends outside the main body housing 40. The power motor 23 in the compact reciprocating power mechanism is activated, driving the power synchronous pulley 24 to rotate. After the two-layer synchronous pulley mechanism reduces torque and increases torque, the crank synchronous pulley 27 rotates. The crank shaft 38 of the eccentric portion 37 of the crank synchronous pulley 27 drives the connecting rod 30 to move. The connecting rod 30 is rotatably connected to the sliding end 12 of the reciprocating work head 10, thereby forcing the sliding end 12 to slide along the fixed end 11. The massage head 41 connected to the sliding end 12 then reciprocates, extending out of the main body housing 40 to massage the human body. Through this setting, efficient, stable and powerful massage actions can be provided. The compact reciprocating power mechanism can be reasonably arranged inside the main shell 40, reducing the overall volume of the massager and making it convenient to carry and use; the stable transmission structure ensures that the movement of the massage head 41 is precise and controllable, providing users with a more comfortable and consistent massage experience; the fixed installation method of internal components enhances the durability of the massager and reduces the occurrence rate of failures; this integrated design facilitates the assembly and maintenance of the massager, reduces production and after-sales costs, and has significant economic advantages for massager products produced and sold on a large scale.

[0040] Please refer to Figure 7-8In the embodiment of the present invention, it is further proposed that the front end of the main shell 40 is provided with an opening for the massage head 41 to extend out, the fixed end 11 includes a connecting plate 111 fixedly installed at the opening position, a first guide rod 112 connected between the connecting plate 111 and the fixed base plate 21, and a second guide rod 113 connected between the connecting plate 111 and the inside of the main shell 40, the first guide rod 112 and the second guide rod 113 cooperate with each other in parallel, the sliding end 12 is slidably connected to the first guide rod 112 and the second guide rod 113, and the sliding end 12 is provided with a plurality of connecting rods 13 that guide and pass through the connecting plate 111, and the massage head 41 is connected to the end of the plurality of connecting rods 13; when the compact reciprocating power mechanism is in operation, the sliding end 12 of the reciprocating working head 10 is pushed to slide along the first guide rod 112 and the second guide rod 113. The multiple connecting rods 13 on the sliding end 12 are guided and passed through the connecting plate 111, driving the massage head 41 to move accordingly. The massage head 41 extends through the opening at the front end of the main shell 40 to achieve a massage action; the parallel cooperation of the first guide rod 112 and the second guide rod 113 provides a stable and precise sliding guide for the sliding end 12, ensuring the accuracy of the movement trajectory of the massage head 41; the cooperation between the multiple connecting rods 13 and the connecting plate 111 further enhances the stability of the movement of the sliding end 12, reduces shaking and deviation; this guiding structure helps to disperse the pressure generated when the sliding end 12 moves, reduce component wear, and extend service life.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. A compact reciprocating power mechanism, characterized in that: The invention comprises a reciprocating working head (10) and a crank-connecting rod power mechanism (20) connected to the reciprocating working head (10) in a transmission manner, wherein the crank-connecting rod power mechanism (20) comprises a fixed base plate (21), a motor mounting seat (22) arranged at the lower end of the fixed base plate (21), a power motor (23) fixedly mounted on the motor mounting seat (22), a power synchronous wheel (24) connected to the power motor (23), a first reduction synchronous wheel (25) rotatably connected to the lower end of the fixed base plate (21), and a first reduction synchronous wheel (25) arranged on the fixed base plate (21) and coaxially connected to the first reduction synchronous wheel (25). a second reduction synchronous wheel (26) connected to the crank synchronous wheel (27) rotatably connected to the upper end of the fixed base plate (21), a first synchronous belt (28) sleeved between the power synchronous wheel (24) and the first reduction synchronous wheel (25), a second synchronous belt (29) sleeved on the second reduction synchronous wheel (26) and the crank synchronous wheel (27), and a connecting rod (30) rotatably connected to the crank synchronous wheel (27), wherein one end of the connecting rod (30) is eccentrically connected to the crank synchronous wheel (27), and the other end of the connecting rod (30) is rotatably connected to the reciprocating working head (10).

2. A compact reciprocating power mechanism according to claim 1, characterized in that: The number of teeth of the power synchronous wheel (24) is smaller than the number of teeth of the first reduction synchronous wheel (25), the number of teeth of the first reduction synchronous wheel (25) is larger than the number of teeth of the second reduction synchronous wheel (26), and the number of teeth of the second reduction synchronous wheel (26) is smaller than the number of teeth of the crank synchronous wheel (27).

3. A compact reciprocating power mechanism according to claim 1, characterized in that: A connecting column (31) is connected between the fixed base plate (21) and the motor mounting seat (22). The fixed base plate (21) and the motor mounting seat (22) are separated by the connecting column (31) to form a space capable of accommodating the power synchronous wheel (24). The power motor (23) is mounted at the lower end of the motor mounting seat (22). The power motor (23) has a motor shaft that passes through the motor mounting seat (22) and is axially connected to the power synchronous wheel (24).

4. A compact reciprocating power mechanism according to claim 1, characterized in that: A connecting shaft (32) is provided through the fixed base plate (21), and the first deceleration synchronous wheel (25) and the second deceleration synchronous wheel (26) are coaxially connected via the connecting shaft (32).

5. A compact reciprocating power mechanism according to claim 4, characterized in that: A shaft sleeve (33) is formed on the first reduction synchronous wheel (25), the connecting shaft (32) is fixedly connected in the shaft sleeve (33), the outside of the shaft sleeve (33) is connected to a bearing (34), and the first reduction synchronous wheel (25) is rotationally connected to the fixed base plate (21) through the bearing (34).

6. A compact reciprocating power mechanism according to claim 5, characterized in that: A through hole is formed on the fixed base plate (21), and a receiving groove (35) matching the bearing (34) is formed along the through hole at the lower end of the fixed base plate (21). The bearing (34) is arranged in the receiving groove (35), and a fixing ring (36) is fixedly installed on the through hole to constrain the bearing (34) in the receiving groove (35).

7. A compact reciprocating power mechanism according to claim 1, characterized in that: An eccentric portion (37) is formed on the crank synchronous wheel (27), and a crank shaft (38) is provided on the eccentric portion (37). The connecting rod (30) is rotationally connected to the crank shaft (38).

8. A massager, characterized in that: A compact reciprocating power mechanism comprising any one of claims 1 to 7, further comprising a main body shell (40) and a massage head (41), wherein the reciprocating working head (10) has a fixed end (11) and a sliding end (12) guided and sliding along the fixed end (11), the massage head (41) is connected to the sliding end (12), the connecting rod (30) is rotatably connected to the sliding end (12), the fixed end (11) and the fixed base plate (21) are both fixedly mounted inside the main body shell (40), and the massage head (41) extends outside the main body shell (40).

9. A massager according to claim 8, characterized in that: The front end of the main housing (40) is provided with an opening for the massage head (41) to extend out. The fixed end (11) includes a connecting plate (111) fixedly installed at the opening position, a first guide rod (112) connected between the connecting plate (111) and the fixed base plate (21), and a second guide rod (113) connected between the connecting plate (111) and the inside of the main housing (40). The first guide rod (112) and the second guide rod (113) are parallel to each other. The sliding end (12) is slidably connected to the first guide rod (112) and the second guide rod (113). The sliding end (12) is provided with a plurality of connecting rods (13) that are guided and penetrated through the connecting plate (111). The massage head (41) is connected to the ends of the plurality of connecting rods (13).

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