Reciprocating motion structure and massage device comprising same

Abstract

A reciprocating motion structure and a massage device (5) comprising same. The reciprocating motion structure comprises a main shaft (1), wherein a plurality of circular groove tracks (101) having an inclined and closed-loop structure are arranged at intervals in the axial direction of the circumferential wall face of the main shaft (1); a guide shaft (2), which is arranged on one side of the main shaft (1); action beads (3), which are sleeved on the guide shaft (2), wherein each action bead (3) is in sliding contact or rolling contact with one circular groove track (101); and a suspension support structure (4), which is arranged between each action bead (3) and the guide shaft (2). The present structure enables the area of friction between the action beads (3) and silicone to be reduced, so that, whilst it is ensured that the action beads (3) can provide relatively strong massage stimulation for the massage device (5), the friction force between the action beads (3) and the silicone can be reduced, leading to a reduction in the heat generated by friction, thus prolonging the service life of the silicone; the noise generated by movement can be minimized, and the power consumption of the massage device (5) can be reduced.

Description

Reciprocating motion structure and massage device comprising the same Technical Field

[0001] The present invention belongs to the technical field of massage devices, and relates to a technology for reducing friction of moving parts in a massage device, and particularly relates to a reciprocating motion structure and a massage device comprising the reciprocating motion structure. Background Art

[0002] Reciprocating motion is a repetitive up-and-down or back-and-forth linear movement. It is found in a wide variety of mechanical devices, including reciprocating engines and pumps. The two opposing motions that make up a single reciprocating cycle are called a stroke.

[0003] In the prior art, reciprocating motion can be achieved through various mechanical structures. The most common one is that a driving member (driving motor) drives a rotating rod having a reverse double helical groove to rotate, thereby driving a sliding body slidably connected to the reverse double helical groove to slide along the double helical groove, thereby driving the telescopic ring connected to the sliding body to move.

[0004] Massage products with this structure are common in the medical device or rehabilitation massage fields. For example, when used in rehabilitation and health massage products, the reciprocating motion of the telescopic ring causes the silicone rubber in the massage product to deform, thereby massaging various body parts to varying degrees. This helps women relax and soothe their lower back and abdomen after childbirth, thus achieving postoperative care and rehabilitation health.

[0005] However, it is foreseeable that the entire circumferential outer wall of the telescopic ring is in sliding contact with the protective silicone rubber on the exterior of the massage product, resulting in significant friction. Therefore, on the one hand, the movement of the telescopic ring will be subject to significant frictional resistance, thereby placing a significant load on the drive system. On the other hand, the friction will generate significant heat, affecting the lifespan and normal function of the product.

[0006] The above structure is one of the structures that can achieve massage. In other structures, the massage function is achieved by driving rotatable beads. However, since the beads are sleeved on an axis, the gap between the two will reduce the stability of the bead movement.

[0007] Summary of the Invention

[0008] In order to solve the above-mentioned problems in the prior art, the present invention provides a reciprocating motion structure and a massage device including the reciprocating motion structure.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is:

[0010] A reciprocating motion structure is provided, comprising:

[0011] A main shaft, wherein a plurality of track ring grooves having an inclined and closed-loop structure are arranged at intervals along the axial direction of the main shaft on the circumferential wall surface of the main shaft;

[0012] A guide shaft is arranged on one side of the main shaft in a state of being parallel to the main shaft;

[0013] an actuating ball, sleeved on the guide shaft, wherein the actuating ball is in sliding contact or rolling contact with the track ring groove, and when the main shaft is driven by a driving member to rotate, the actuating ball reciprocates along the axial direction of the guide shaft;

[0014] Also includes:

[0015] A suspension support structure is slidably arranged between the action bead and the guide shaft, and is used to apply an elastic force to the guide shaft so that the action bead can be maintained in a suspended state on the circumferential wall surface of the guide shaft.

[0016] Preferably, when the action bead is in sliding contact with the track ring groove, the action bead is eccentrically structured and sleeved on the guide shaft. Taking the central axis of the guide shaft as the reference line, the volume of the part of the action bead located on one side of the central axis and close to the track ring groove is recorded as V1, and the volume of the part of the action bead located on the other side of the central axis and away from the track ring groove is recorded as V2, and V1>V2.

[0017] Preferably, the suspension support structure is used to provide at least a first degree of freedom, a second degree of freedom and / or a third degree of freedom to the action bead;

[0018] In which, the first degree of freedom is configured to allow the action ball to undergo a first displacement X radially along the guide shaft; and the second degree of freedom is configured to allow the action ball to undergo a second displacement Y axially along the guide shaft; and / or the third degree of freedom is configured to allow the action ball to rotate about the axis of the guide shaft.

[0019] Preferably, the suspended support structure is at least partially elastic, and the elastic structure allows the first displacement X to occur by deforming; and the elastic structure has at least one contact point or one contact surface, and the contact point or the contact surface is in sliding contact with the circumferential wall surface of the guide shaft, allowing the second displacement Y to occur and the action bead to rotate by sliding.

[0020] Preferably, when the actuating bead is in sliding contact with the track ring groove, the first degree of freedom and the second degree of freedom provided by the suspension support structure to the actuating bead are retained, and the third degree of freedom is cancelled.

[0021] Preferably, the track ring groove has at least a first limiting surface that is in sliding contact with a circumferential wall surface of the action ball portion, and the first limiting surface is configured to apply a first force to the action ball and urge the action ball to move along the direction of the first force; and the track ring groove has at least a second limiting surface that is in sliding contact with a circumferential wall surface of the action ball portion, and the second limiting surface is configured to apply a second force to the action ball and urge the action ball to move along the direction of the second force;

[0022] The directions of the first acting force and the second acting force are consistent with the axial direction of the guide shaft, and the directions of the first acting force and the second acting force are opposite to each other, so as to form the reciprocating motion of the action ball.

[0023] Preferably, the area of ​​the outer wall of the action bead located on one side of the guide shaft and close to the track ring groove is S, the contact area between the first limiting surface and the circumferential wall of the action bead is S1, and the contact area between the second limiting surface and the circumferential wall of the action bead is S2, wherein S1+S2≤S.

[0024] Preferably, when the actuating bead is in rolling contact with the track ring groove, the first degree of freedom, the second degree of freedom and the third degree of freedom provided by the suspension support structure to the actuating bead are retained.

[0025] Preferably, the track ring groove has at least a third limiting surface that contacts a portion of the circumferential wall surface of the actuating ball, and the third limiting surface is configured to perform rolling friction with the actuating ball.

[0026] Preferably, the area of ​​the outer wall of the action ball located on one side of the guide shaft and close to the track ring groove is S, and the contact area between the third limiting surface and the circumferential wall of the action ball part is S3, wherein S3≤S.

[0027] Preferably, the actuating bead forms a through assembly hole, and the assembly hole is configured to be clearance-fitted with the guide shaft and to mount the suspension support structure.

[0028] Preferably, the assembly hole has a first installation station close to the edge of one end hole of the assembly hole, a second installation station close to the edge of the other end hole of the assembly hole, and a third installation station located at any position between the first installation station and the second installation station;

[0029] Wherein, the suspended support structure is arranged at the first installation station; and / or the suspended support structure is arranged at the second installation station; and / or the suspended support structure is arranged at the third installation station.

[0030] Preferably, the suspension support structure is composed of a first support member, and the first support member at least includes a connecting section and a contact section;

[0031] The connecting section has an arc-shaped structure, and an elastic adaptation space is formed between the connecting section and the circumferential wall surface of the guide shaft. When the actuating bead undergoes a first displacement X due to the first degree of freedom, the elastic adaptation space adapts to the occurrence of the first displacement X in a first elastic state or a second elastic state.

[0032] The contact section has a straight-line structure and is in sliding contact with the circumferential wall of the guide shaft. When the action bead undergoes a second displacement Y due to the second degree of freedom, or when the action bead rotates due to the third degree of freedom, the contact section is in a first sliding state or a second sliding state to adapt to the occurrence of the second displacement Y or rotation action.

[0033] Preferably, the elastic adaptation space is compressed to form the first elastic state; and the elastic adaptation space is rebounded to form the second elastic state.

[0034] Preferably, the contact segment slides along the axis of the guide shaft to form the first sliding state; and the contact segment rotates about the axis of the guide shaft to form the second sliding state.

[0035] Preferably, when the elastic adaptation space transitions from the first elastic state to the second elastic state, the contact segment adapts to the dynamic change of the elastic adaptation space in a fourth sliding state;

[0036] The contact section slides along the axial direction of the guide shaft to form a fourth sliding state.

[0037] Preferably, the contact segment slides along the axial direction of the guide shaft to form the fourth sliding state.

[0038] Preferably, the suspension support structure is composed of a second support member, and the second support member includes at least a support claw that is partially elastic, and the support claw is in sliding contact with the circumferential wall surface of the guide shaft.

[0039] Preferably, the supporting claw has a claw end and a claw body, the claw body is of elastic structure, and the claw end is of hard structure and is in sliding contact with the circumferential wall surface of the guide shaft.

[0040] Preferably, the suspension support structure is composed of a third support member, and the third support member at least includes a ring member presenting a ring structure and an abutment member presenting a curved structure;

[0041] In which, the annular member is in sliding contact with the circumferential wall surface of the guide shaft, and the abutment member is connected to the assembly hole to form a first connection structure; or the annular member is connected to the assembly hole, and the abutment member is in sliding contact with the circumferential wall surface of the guide shaft to form a second connection structure.

[0042] Preferably, when the suspension support structure is in the first connection structure, the annular member is a hard material and the abutment member is an elastic material; and when the suspension support structure is in the second connection structure, the annular member is an elastic material and the abutment member is a hard material.

[0043] Preferably, the guide shaft is a cylindrical structure or a polygonal column structure;

[0044] Wherein, when the guide shaft is a cylindrical structure, the action ball is in rolling contact with the track ring groove;

[0045] When the guide shaft is a non-cylindrical structure, the actuating ball is in sliding contact with the track ring groove.

[0046] Preferably, when the guide shaft is a polygonal column structure, the suspension support structure is provided at least on each side of the polygonal column structure.

[0047] The present invention also provides a massage device, comprising at least:

[0048] Handle handle;

[0049] A driving member is disposed in the hand-held handle;

[0050] The reciprocating motion structure as described in any one of the above technical solutions is connected to the driving end of the driving member;

[0051] a housing connected to the hand-held handle, wherein the reciprocating motion structure is disposed in the housing, wherein the housing is provided with an opening for exposing the action bead;

[0052] The silicone sleeve is coated on the shell and contacts the action bead.

[0053] The present invention provides a reciprocating motion structure, and the beneficial effects of the present invention are embodied in:

[0054] Sliding friction occurs between the action beads and the track ring groove, and between the action beads and the silicone of the massage device. Compared to the situation in the prior art where the entire moving part (telescopic ring) slides against the silicone, this structure reduces the friction area between the action part, i.e., the action beads, and the silicone, thereby reducing the friction between the action part, i.e., the action beads and the silicone while ensuring that the action beads can provide a relatively strong massage stimulation to the massage device, thereby reducing the heat generated by friction and thus increasing the service life of the silicone; when the action beads and the track ring groove adopt rolling contact, the sliding friction is converted into rolling friction, thereby further reducing the friction between the action beads and the track ring groove and the action beads and the silicone while ensuring that the action beads move smoothly, thereby reducing the heat generated by friction and increasing the service life of the structure and the silicone. Correspondingly, the reciprocating motion of the action beads is smoother, and the noise generated by the motion can also be reduced, as well as the power consumption of the massage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] FIG1 is a perspective view of a reciprocating motion structure proposed by the present invention;

[0056] FIG2 is a front view of the reciprocating motion structure proposed by the present invention;

[0057] FIG3 is a perspective view of a massage device according to the present invention;

[0058] FIG4 is a second perspective view of the massage device proposed by the present invention (with the silicone sleeve hidden);

[0059] FIG5 is a front view of the massage device provided by the present invention;

[0060] FIG6 is a side view of the massage device provided by the present invention;

[0061] FIG7 is a schematic structural diagram of the reciprocating motion structure proposed by the present invention in which the suspended support structure is the first support member;

[0062] FIG8 is a schematic diagram of the structure in which the action bead in FIG7 is partially offset;

[0063] FIG9 is a schematic structural diagram of the reciprocating motion structure proposed by the present invention in which the suspended support structure is the second support member;

[0064] FIG10 is a schematic diagram of the structure in which the action bead in FIG9 is partially offset;

[0065] FIG11 is a schematic diagram of a structure in which the suspended support structure is a third support member in the reciprocating motion structure proposed by the present invention;

[0066] FIG12 is a schematic diagram of the structure in which the action bead in FIG11 is partially offset;

[0067] FIG13 is a second structural diagram of the reciprocating motion structure proposed by the present invention in which the suspended support structure is the third support member;

[0068] FIG14 is a schematic diagram of the structure in which the action bead in FIG13 is partially offset;

[0069] FIG15 is a schematic diagram of the structure of the reciprocating motion structure proposed by the present invention when the actuating ball and the track ring groove adopt sliding contact;

[0070] FIG16 is a schematic diagram of the structure of the reciprocating motion structure proposed by the present invention when the actuating ball and the track ring groove adopt rolling contact;

[0071] FIG17 is a schematic structural diagram of the action bead in the reciprocating motion structure proposed by the present invention.

[0072] Explanation of the accompanying drawings: 1. Main shaft; 101. Track ring groove; 1011. Highest point; 1012. Lowest point; 1013. First limiting surface; 1014. Second limiting surface; 1015. Third limiting surface; 2. Guide shaft; 3. Action bead; 301. Assembly hole; 3011. First installation station; 3012. Second installation station; 3013. Third installation station; 4. Suspended support structure; 401. First support member; 4011. Connecting section; 4012. Contact section; 402. Second support member; 4021. Claw end; 4022. Claw body; 403. Third support member; 4031. Ring member; 4032. Abutment member; 5. Massage device; 501. Handle; 502. Shell; 5021. Opening; 503. Silicone sleeve. DETAILED DESCRIPTION

[0073] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0074] Please refer to Figures 1 to 17 , the specific embodiments provided by the present invention are as follows:

[0075] As shown in FIG1 and FIG2 , the first embodiment of the present invention provides a reciprocating motion structure, comprising:

[0076] The main shaft 1 has a plurality of inclined and closed-loop track ring grooves 101 arranged at intervals along the axial direction of the main shaft 1 on its circumferential wall surface;

[0077] The guide shaft 2 is arranged on one side of the main shaft 1 in a state of being parallel to the main shaft 1;

[0078] The action ball 3 is sleeved on the guide shaft 2, wherein the action ball 3 is in sliding contact or rolling contact with the track ring groove 101. When the main shaft 1 is driven by a driving member to rotate, the action ball reciprocates along the axial direction of the guide shaft.

[0079] In this embodiment, one end of the main shaft 1 is connected to a driving member, such as a motor. When the driving end of the driving member rotates, the main shaft 1 is driven to rotate synchronously, thereby driving the actuating ball 3 to reciprocate along the path of the track ring groove 101.

[0080] A plurality of track ring grooves 101 are spaced apart on the circumferential wall surface of the main shaft 1. The track ring grooves 101 have an inclined structure. Specifically, the track ring grooves 101 have a highest point 1011 and a lowest point 1012. The highest point 1011 and the lowest point 1012 form a height difference in the axial direction of the main shaft 1. The height of the highest point 1011 and the lowest point 1012 is the movement stroke of a single action bead 3. Therefore, it can be seen that when the action bead 3 is expected to have a larger movement stroke, the movement stroke of the action bead 3 can be increased by increasing the height difference between the highest point 1011 and the lowest point 1012. Correspondingly, due to the increase in the movement stroke of the action bead 3, its own movement cycle will also increase accordingly. When this structure is configured on a massage product, the increase in cycle will result in a relatively mild physical sensation feedback to the user from the massage product. When the action bead 3 is expected to have a smaller movement stroke, the movement stroke of the action bead 3 can be reduced by reducing the height difference between the highest point 1011 and the lowest point 1012. Correspondingly, due to the reduced travel of the motion beads 3, their cycle is also shortened. When this structure is deployed on a massage product, the shortened cycle results in a more intense physical sensation for the user. Therefore, the inclination angle of the track ring groove 101—that is, the height difference between its highest point 1011 and lowest point 1012—can be adjusted and optimized based on the desired degree of gentle or intense massage action provided by the massage product.

[0081] A guide shaft 2 is provided on one side of the main shaft 1. The guide shaft 2 is kept parallel to the main shaft 1 to ensure that the distance between the two is consistent at any point, thereby ensuring that the action bead 3 does not deviate from the expected path during action.

[0082] There are two forms of contact between the actuating ball 3 and the track ring groove 101 .

[0083] First, the action ball 3 is in sliding contact with the track ring groove 101. Under this contact form, the action process of the action ball 3 is as follows:

[0084] When the driver rotates the spindle 1, the track ring groove 101 exerts a force on the circumferential wall surface above or below the actuating ball 3, forcing the actuating ball 3 to reciprocate along the axis of the spindle 1. In other words, the actuating ball 3 loses its rotational state and only retains its linear motion.

[0085] It is foreseeable that sliding friction will occur between the actuating beads 3 and the track ring groove 101, as well as between the actuating beads 3 and the silicone rubber of the massage device 5. Compared to the prior art where the entire moving component (telescopic ring) slides against the silicone rubber, this structure reduces the friction area between the actuating member, i.e., the actuating beads 3, and the silicone rubber. This reduces the friction between the actuating member, i.e., the actuating beads 3, and the silicone rubber, while ensuring that the actuating beads 3 can provide a relatively strong massage stimulation to the massage device 5. This reduces the heat generated by friction and thus increases the service life of the silicone rubber.

[0086] Secondly, the action ball 3 is in rolling contact with the track ring groove 101. Under this contact form, the action process of the action ball 3 is as follows:

[0087] The driving member drives the main shaft 1 to rotate, and the actuating ball 3 rolls in the track ring groove 101 and reciprocates along the path of the track ring groove 101. In other words, the action of the actuating ball 3 retains both a rotational state and a linear action state.

[0088] Considering that sliding friction still exists between the action bead 3 and the track ring groove 101 in the first contact mode (i.e., sliding contact), and that the heat generated by sliding friction is higher than that generated by rolling friction, when the action bead 3 and the track ring groove 101 adopt the second contact mode (i.e., rolling contact), sliding friction is converted into rolling friction. This, while ensuring the smooth movement of the action bead 3, further reduces the friction between the action bead 3 and the track ring groove 101, and between the action bead 3 and the silicone rubber, thereby reducing the heat generated by friction and extending the service life of the structure and the silicone rubber. Correspondingly, the reciprocating motion of the action bead 3 is smoother, and mechanical noise and energy consumption of the massage device 5 are reduced.

[0089] The second embodiment of the present invention provides a reciprocating motion structure, and based on the first embodiment, further includes:

[0090] As shown in Figures 7 to 14, the suspension support structure 4 is slidably arranged between the action bead 3 and the guide shaft 2. The suspension support structure 4 is used to apply an elastic force to the guide shaft 2 so that the action bead 3 can be maintained in a suspended state on the circumferential wall of the guide shaft 2.

[0091] During the reciprocating motion of the actuating ball 3 , it is foreseeable that the size of the assembly gap between the actuating ball 3 and the guide shaft 2 will affect the stability of the actuating ball 3 .

[0092] When the assembly clearance is large, the reciprocating motion of the actuating bead 3 is subject to significant fluctuations in force, particularly from the track groove 101 or the silicone rubber. In this embodiment, fluctuation is defined as the ease with which the actuating bead 3 deviates from the predetermined direction (the axial direction of the guide shaft 2). When this fluctuation is significant, the reciprocating motion of the actuating bead 3 becomes relatively unstable.

[0093] When the assembly gap is small, the action bead 3 is subjected to force during the reciprocating motion, especially when the track ring groove 101 or the silicone exerts force on the action bead 3, it is very easy to rub against the guide shaft 2. On the one hand, it leads to an increase in the friction part of the structure, thereby increasing the heat generated by friction; on the other hand, it also causes the reciprocating motion of the action bead 3 to get stuck, thereby reducing the smoothness of the reciprocating motion.

[0094] Based on this, in this embodiment, a suspension support structure 4 is added between the action ball 3 and the guide shaft 2 .

[0095] The suspension support structure 4 creates an interaction force between the actuating bead 3 and the guide shaft 2. This interaction force helps keep the actuating bead 3 suspended, thereby further stabilizing its installed position. Furthermore, the force exerted on the actuating bead 3 by the track ring groove 101 or the silicone rubber is offset by this interaction force, maintaining the stability of the actuating bead 3 during its reciprocating motion.

[0096] From this, we can see that the suspended support structure 4 can reduce the impact of the assembly gap on the movement of the action bead 3, that is, the aforementioned technical problem, thereby ensuring the smoothness of the reciprocating motion of the action bead 3 and reducing the fluctuation of the force acting on the action bead 3.

[0097] It should be noted that the suspension support structure 4 can be single or multiple. When it is multiple, it can be 2 or 4. The 2 or 4 suspension support structures 4 are respectively arranged in different directions between the action ball 3 and the guide shaft 2. Each suspension support structure 4 is an independent component.

[0098] On the basis of the above, considering that the reciprocating motion of the action ball 3 includes both rotational and linear motion states, the suspension support structure 4 must be optimized in at least the following two aspects:

[0099] First, the force provided by the suspension support structure 4 is an elastic force. The suspension support structure 4 can adapt to the problem of unbalanced forces exerted by the track ring groove 101 and the silicone on the action bead 3 by deforming. As a counterexample, when the suspension support structure 4 provides a rigid force, when there is a difference between the force exerted by the track ring groove 101 on the action bead 3 and the force exerted by the silicone on the action bead 3, it is very easy to cause the suspension support structure 4 to break, thereby rendering the force it provides ineffective. Therefore, it is foreseeable that when the force provided by the suspension support structure 4 is an elastic force, it helps to consume the above-mentioned force, thereby allowing the action bead 3 to have a better dynamic adjustment ability for its own motion state.

[0100] Secondly, at least part of the suspension support structure 4 is in sliding contact with the guide shaft 2. When the actuating ball 3 reciprocates, whether it maintains a rotational state or a linear motion state, the form of sliding contact can satisfy the situation where the two states occur simultaneously or at different times.

[0101] The third embodiment of the present invention proposes a reciprocating motion structure. When the action bead 3 is in sliding contact with the track ring groove 101, the action bead 3 is eccentrically sleeved on the guide shaft 2. Taking the central axis of the guide shaft 2 as the reference line, the volume of the part of the action bead 3 located on one side of the central axis and close to the track ring groove 101 is recorded as V1, and the volume of the part of the action bead 3 located on the other side of the central axis and away from the track ring groove 101 is recorded as V2, V1>V2.

[0102] Since the contact between the action bead 3 and the track ring groove 101 is usually rigid-rigid (hereinafter referred to as rigid contact), the contact between the action bead 3 and the silicone of the massage device 5 is usually rigid-flexible (hereinafter referred to as semi-rigid contact).

[0103] When the actuating ball 3 is in sliding contact with the track ring groove 101, i.e., sliding friction occurs, the following points can be analyzed:

[0104] 1. From the perspective of structural wear caused by sliding friction, generally speaking, materials with higher hardness will experience less wear when sliding friction occurs, while materials with lower hardness will experience more wear when sliding friction occurs. Therefore:

[0105] In the rigid contact part, different materials can be selected for the two according to the expected wear amount of the action bead 3 or the track ring groove 101, so as to achieve the purpose of higher wear amount of the expected action bead 3 and lower wear amount of the track ring groove 101, or lower wear amount of the expected action bead 3 and higher wear amount of the track ring groove 101.

[0106] It should be noted that when the hardness of the actuating ball 3 and the track ring groove 101 is close, the wear of both is relatively high. Therefore, when selecting the materials of the two, the above problems should be avoided to reduce costs.

[0107] In the semi-rigid contact part, the wear of silicone is undoubtedly relatively high and it is relatively difficult to optimize this situation.

[0108] Therefore, under this analysis, the following conclusions can be drawn:

[0109] It is easier to adjust and optimize the rigid contact part, while it is more difficult to adjust and optimize the semi-rigid contact part.

[0110] 2. From the perspective of frictional heat generated by sliding friction.

[0111] In the rigid contact part, the contact area between the action bead 3 and the track ring groove 101 during the action process is relatively certain. The reason is that: since the action bead 3 and the track ring groove 101 are both made of hard materials, the actual contact area when the two contact each other is close to the nominal contact area (apparent contact area), that is, no matter how the interaction force between the action bead 3 or the track ring groove 101 changes, the contact area will not undergo a large deformation, which will lead to an increase in the friction area.

[0112] In the semi-rigid contact part, since silicone is an elastic material, it will cover the circumferential wall of the action bead 3 to a greater extent or over a larger area, and during the action of the action bead 3, the contact area of ​​the silicone will be deformed more or less, thereby increasing the contact area.

[0113] Therefore, under this analysis, the following conclusions can be drawn:

[0114] 1. Due to the change in friction area, the heat generated by the friction between the action bead 3 and the track ring groove 101 is theoretically less than the heat generated by the friction between the action bead 3 and the silicone rubber;

[0115] 2. The friction area of ​​the rigid contact part has more controllability than the friction area of ​​the semi-rigid contact part.

[0116] In summary, combined with the conclusions drawn from the above two analyses, we can further conclude that optimizing the rigid contact part is more feasible.

[0117] Therefore, this embodiment performs the following optimizations:

[0118] By configuring the actuating bead 3 with an eccentric structure, it creates a larger contact volume with the track ring groove 101, creating a larger friction area and increasing the frictional heat generated in this area. This, in turn, reduces the contact volume between the actuating bead 3 and the silicone rubber, reducing the frictional area between them and reducing the frictional heat generated in this area, ultimately achieving effective protection for the silicone rubber. In other words, the semi-rigid contact portion is preserved at the expense of the rigid contact portion, and optimization of the rigid contact portion is relatively easy, ensuring acceptable operability.

[0119] Furthermore, considering the problem of heat dissipation, the main shaft 1 can be made of a metal material with good thermal conductivity, so as to conduct or dissipate the heat generated by friction.

[0120] As shown in FIG8, FIG10, FIG12, and FIG14, when the operating bead 3 is an eccentric structure, it can be in the following form.

[0121] The elastic force applied by the suspension support structure 4 can be divided into two parts. One part acts on the part of the action bead 3 that contacts the track ring groove 101, which is recorded as F1. The other part acts on the part of the action bead 3 that contacts the silicone, which is recorded as F2. When F1 is greater than F2, it can be seen that the suspension support structure 4 is more inclined to act on the side close to the track ring groove 101, that is, the volume V1 of the action bead 3 close to the track ring groove 101 is greater than its volume V2 away from the track ring groove 101 (taking the central axis of the guide shaft 2 as the reference line, the volume of the part of the action bead 3 on one side of the central axis and close to the track ring groove 101 is recorded as V1, and the volume of the part of the action bead 3 on the other side of the central axis and away from the track ring groove 101 is recorded as V2). This constitutes a form of eccentric structure of the action bead 3.

[0122] The fourth embodiment of the present invention provides a reciprocating motion structure, wherein the suspension support structure 4 is used to provide at least a first degree of freedom, a second degree of freedom and / or a third degree of freedom to the action bead 3;

[0123] In which, the first degree of freedom is configured to allow the action ball 3 to undergo a first displacement X radially along the guide shaft 2; and the second degree of freedom is configured to allow the action ball 3 to undergo a second displacement Y axially along the guide shaft 2; and / or the third degree of freedom is configured to allow the action ball 3 to rotate about the axis of the guide shaft 2.

[0124] In this embodiment, the suspended support structure 4 can provide the action bead 3 with a first degree of freedom, a second degree of freedom and / or a third degree of freedom.

[0125] Specifically, when the actuating ball 3 is in sliding contact with the track ring groove 101 and reciprocating motion, as shown in the aforementioned state analysis, the actuating ball 3 is in a linear motion state. Therefore, when the second degree of freedom allows the actuating ball 3 to undergo a second displacement Y, the requirement for a linear motion state is met, thereby ensuring that the actuating ball 3 can move along the axial direction of the guide shaft 2.

[0126] Specifically, when the actuating ball 3 is in rolling contact with the track ring groove 101, and when the actuating ball 3 reciprocates, as shown in the aforementioned state analysis, the actuating ball 3 has both a linear motion state and a rotational state. Therefore, when the second degree of freedom allows the actuating ball 3 to undergo a second displacement Y, and the third degree of freedom allows the actuating ball 3 to undergo rotational motion, the requirements for both linear motion and rotational states are met, thereby ensuring that the actuating ball 3 can both perform linear motion along the axis of the guide shaft 2 and undergo rolling motion with the track ring groove 101.

[0127] On the basis of the above, regardless of whether the action bead 3 is in sliding contact or rolling contact with the track ring groove 101, when the force provided by the track ring groove 101 on the action bead 3 is unbalanced with the force provided by the silicone on the action bead 3, the action bead 3 will deviate from the expected reciprocating motion direction within a certain period of time. Therefore, when the first degree of freedom allows the action bead 3 to undergo a first displacement X, the above-mentioned deviation action requirement can be met, thereby making the reciprocating motion of the action bead 3 more stable, and avoiding the reciprocating motion of the action bead 3 from stopping or getting stuck due to the unbalanced action of the above-mentioned forces.

[0128] The fifth embodiment of the present invention proposes a reciprocating motion structure, in which the suspended support structure 4 is at least partially elastic, and the elastic structure allows the first displacement X to occur by deforming; and the elastic structure has at least one contact point or one contact surface, and the contact point or contact surface is in sliding contact with the circumferential wall surface of the guide shaft 2, allowing the second displacement Y to occur and allowing the action bead 3 to rotate by sliding.

[0129] In this embodiment, the elastic force of the suspended support structure 4 is provided by an elastic structure.

[0130] When part of the suspended support structure 4 presents an elastic structure, it can be expected that:

[0131] 1. When the actuating bead 3 is subjected to an unbalanced force, the elastic structure can deform to allow a first displacement X to occur, thereby ensuring the stability of the reciprocating motion;

[0132] 2. When the action ball 3 is performing reciprocating motion, the elastic structure can be connected to the circumferential wall surface of the guide shaft 2 in the form of point sliding contact or surface sliding contact, thereby allowing rotation and the occurrence of the second displacement Y to ensure the smoothness of the reciprocating motion.

[0133] Among them, when the elastic structure is in point contact, there is a relatively small friction area between it and the circumferential wall of the guide shaft 2, which can ensure the reduction of frictional heat between the action bead 3 and the guide shaft 2, thereby reducing the loss of the structure; however, it can be foreseen that the support force provided by the elastic structure to the action bead 3 is relatively weak at this time, which may cause instability in the reciprocating motion of the action bead 3.

[0134] When the elastic structure is in surface contact, there is a relatively large friction area between it and the circumferential wall of the guide shaft 2, which may cause relatively high friction heat between the action bead 3 and the guide shaft 2, thereby increasing the wear of the structure; however, it can be foreseen that at this time the support force provided by the elastic structure to the action bead 3 is relatively stable, thereby ensuring the stability of the reciprocating motion.

[0135] Therefore, whether the elastic structure and the guide shaft 2 are in point sliding contact or surface sliding contact can be adjusted according to the desired friction heat or reciprocating motion stability.

[0136] The sixth embodiment of the present invention proposes a reciprocating motion structure. When the actuating ball 3 is in sliding contact with the track ring groove 101, the first and second degrees of freedom provided by the suspension support structure 4 to the actuating ball 3 are retained, and the third degree of freedom is cancelled.

[0137] In this embodiment, as described above, the degree of freedom provided by the suspension support structure 4 to the motion bead 3 can be adjusted according to whether the motion bead 3 is in rolling contact or sliding contact with the track ring groove 101 .

[0138] Specifically, when the action bead 3 is in sliding contact with the track ring groove 101, since the action bead 3 no longer needs to roll, the third degree of freedom provided by the suspension support structure 4 to the action bead 3 can be cancelled, thereby reducing the total friction heat generated by the structure by reducing the number of friction structures, and ultimately achieving the purpose of reducing structural wear.

[0139] As shown in Figures 1, 2, and 15, the seventh embodiment of the present invention provides a reciprocating motion structure, wherein the track ring groove 101 has at least a first limiting surface 1013 that is in sliding contact with a portion of the circumferential wall surface of the actuating bead 3, and the first limiting surface 1013 is configured to apply a first force to the actuating bead 3 and cause the actuating bead 3 to move in the direction of the first force; and the track ring groove 101 has at least a second limiting surface 1014 that is in sliding contact with a portion of the circumferential wall surface of the actuating bead 3, and the second limiting surface 1014 is configured to apply a second force to the actuating bead 3 and cause the actuating bead 3 to move in the direction of the second force;

[0140] The directions of the first acting force and the second acting force are consistent with the axial direction of the guide shaft 2 , and the directions of the first acting force and the second acting force are opposite to each other, so as to form the reciprocating motion of the actuating ball 3 .

[0141] In this embodiment, when the actuating ball 3 is in sliding contact with the track ring groove 101 , since the actuating ball 3 is no longer in a rotating state, it is necessary to cause the actuating ball 3 to slide along the path of the track ring groove 101 and finally form a reciprocating motion.

[0142] Therefore, the track ring groove 101 has at least a first limiting surface 1013 and a second limiting surface 1014 .

[0143] When the action ball 3 moves along the first direction, which is defined as one of the strokes of the reciprocating motion, the first limiting surface 1013 ensures the aforementioned movement of the action ball 3 by applying a first force to a portion of the circumferential wall surface of the action ball 3 .

[0144] Similarly, when the action bead 3 moves along the second direction, which is defined as another stroke of the reciprocating motion, the second limiting surface 1014 ensures the aforementioned movement of the action bead 3 by applying a second force to a portion of the circumferential wall surface of the action bead 3.

[0145] Thus, the actuating ball 3 forms a complete reciprocating motion under the alternating action of the first force and the second force.

[0146] The eighth embodiment of the present invention proposes a reciprocating motion structure, in which the area of ​​the outer wall of the action ball 3 located on one side of the guide shaft 2 and close to the track ring groove 101 is S, the contact area between the first limiting surface 1013 and the partial circumferential wall of the action ball 3 is S1, and the contact area between the second limiting surface 1014 and the partial circumferential wall of the action ball 3 is S2, wherein S1+S2≤S.

[0147] In this embodiment, it can be seen that when the contact area between the first limiting surface 1013 and the actuating ball 3 is sufficiently large, the movement of the actuating ball 3 in the first direction becomes more stable. Correspondingly, when the contact area between the second limiting surface 1014 and the actuating ball 3 is sufficiently large, the movement of the actuating ball 3 in the second direction becomes more stable. Thus, as the sum of the areas of the first limiting surface 1013 and the second limiting surface 1014 approaches the area S of the outer wall of the actuating ball 3 located on the side of the guide shaft 2 and close to the track ring groove 101, the reciprocating motion of the actuating ball 3 becomes more stable.

[0148] Therefore, the stability of the movement of the action bead 3 can be ensured by adjusting the contact areas between the first limiting surface 1013 , the second limiting surface 1014 and the action bead 3 to a certain extent.

[0149] Of course, as the contact area between the first limiting surface 1013, the second limiting surface 1014 and the action bead 3 increases, the frictional heat will also increase accordingly. Therefore, based on the expectation of the movement stability or frictional heat of the action bead 3, the contact area between the first limiting surface 1013 and the second limiting surface 1014 and the action bead 3 can be adjusted within a certain range.

[0150] The ninth embodiment of the present invention proposes a reciprocating motion structure. When the actuating ball 3 is in rolling contact with the track ring groove 101 , the first degree of freedom, the second degree of freedom and the third degree of freedom provided by the suspension support structure 4 to the actuating ball 3 are retained.

[0151] In this embodiment, as before, the degree of freedom provided by the suspension support structure 4 to the movement can be adjusted according to whether the movement ball 3 is in sliding contact or rolling contact with the track ring groove 101 .

[0152] Specifically, when the action bead 3 is in rolling contact with the track ring groove 101, since the action bead 3 has both a rotational state and a linear motion state, the suspension support structure 4 is required to provide the action bead 3 with a first degree of freedom, a second degree of freedom and a third degree of freedom, so as to meet the requirements of the aforementioned two states, thereby ensuring the stability of the reciprocating motion of the action bead 3.

[0153] As shown in Figures 1, 2 and 16, the tenth embodiment of the present invention proposes a reciprocating motion structure, and the track ring groove 101 has at least a third limiting surface 1015 that contacts a portion of the circumferential wall surface of the action ball 3, and the third limiting surface 1015 is configured to roll and rub against the action ball 3.

[0154] The actuating ball 3 rolls along the path of the third limiting surface 1015 , thereby completing the reciprocating motion process of the actuating ball 3 .

[0155] Compared with the sliding contact between the action ball 3 and the track ring groove 101, the rolling contact generates lower friction heat, which can protect the structure to a certain extent and extend its service life.

[0156] The eleventh embodiment of the present invention proposes a reciprocating motion structure, wherein the area of ​​the outer wall of the action ball 3 located on one side of the guide shaft 2 and close to the track ring groove 101 is S, and the contact area between the third limiting surface 1015 and the circumferential wall of the action ball 3 is S3, wherein S3≤S.

[0157] In this embodiment, it can be seen that when the contact area between the third limiting surface 1015 and the actuating ball 3 is sufficiently large, the rolling motion of the actuating ball 3 becomes more stable, that is, the reciprocating motion of the actuating ball 3 becomes more stable. Therefore, the reciprocating motion of the actuating ball 3 becomes more stable when the area of ​​the third limiting surface 1015 approaches the area S of the outer wall of the actuating ball 3 located on the side of the guide shaft 2 and close to the track ring groove 101.

[0158] Therefore, the stability of the movement of the action bead 3 can be ensured by adjusting the contact area between the third limiting surface 1015 and the action bead 3 to a certain extent.

[0159] Of course, as the contact area between the third limiting surface 1015 and the action bead 3 increases, the frictional heat will also increase accordingly. Therefore, based on the expectation of the movement stability or frictional heat of the action bead 3, the contact area between the third limiting surface 1015 and the action bead 3 can be adjusted within a certain range.

[0160] The twelfth embodiment of the present invention proposes a reciprocating motion structure, wherein the actuating ball 3 forms a through assembly hole 301 , and the assembly hole 301 is configured to be clearance-fitted with the guide shaft 2 and to mount the suspension support structure 4 .

[0161] As shown in FIG. 17 , in this embodiment, an assembly hole 301 is opened along the central axis of the actuating bead 3 .

[0162] The diameter of the assembly hole 301 is preferably large enough to accommodate the installation of the guide shaft 2 and the suspension support structure 4 .

[0163] The thirteenth embodiment of the present invention provides a reciprocating motion structure, wherein the assembly hole 301 includes a first installation station 3011 near the edge of one end hole of the assembly hole 301, a second installation station 3012 near the edge of the other end hole of the assembly hole 301, and a third installation station 3013 located at any position between the first installation station 3011 and the second installation station 3012.

[0164] The suspended support structure 4 is disposed at the first installation station 3011 ; and / or the suspended support structure 4 is disposed at the second installation station 3012 ; and / or the suspended support structure 4 is disposed at the third installation station 3013 .

[0165] In this embodiment, the assembly hole 301 has multiple installation positions to adapt to the installation of the suspended support structure 4 at different positions.

[0166] When the suspension support structure 4 is assembled at the first installation station 3011 , the elastic force provided by the suspension support structure 4 to the action bead 3 acts on one end of the action bead 3 .

[0167] When the suspension support structure 4 is assembled at the second installation station 3012 , the elastic force provided by the suspension support structure 4 to the action bead 3 acts on the other end of the action bead 3 .

[0168] It can be seen that regardless of whether the suspension support structure 4 is installed at the first installation station 3011 or the second installation station 3012, the other end of the actuating bead 3 suffers from greater fluctuations in the applied force due to the lack of elastic force. Therefore, considering this issue, the suspension support structure 4 is preferably installed simultaneously at the first installation station 3011 and the second installation station 3012. This can mitigate the fluctuation differences at the two ends of the actuating bead 3 to a certain extent, thereby ensuring that the reciprocating motion of the actuating bead 3 remains stable.

[0169] Furthermore, the suspended support structure 4 can also be assembled at the third mounting station 3013. Since the third mounting station 3013 is located anywhere between the first mounting station 3011 and the second mounting station 3012, and considering the aforementioned issue of whether the actuating bead 3 can maintain stable motion, the third mounting station 3013 is preferably located at the center of the mounting hole 301. This ensures that the elastic force does not excessively favor the upper or lower portions of the actuating bead 3, thereby ensuring more stable reciprocating motion of the actuating bead 3.

[0170] As shown in FIG7 and FIG8 , the fourteenth embodiment of the present invention provides a reciprocating motion structure, wherein the suspension support structure 4 is composed of a first support member 401 , and the first support member 401 includes at least a connecting section 4011 and a contact section 4012 ;

[0171] The connecting section 4011 has an arc-shaped structure, and an elastic adaptation space is formed between it and the circumferential wall surface of the guide shaft 2. When the actuating bead 3 undergoes a first displacement X due to the first degree of freedom, the elastic adaptation space adapts to the occurrence of the first displacement X in the first elastic state or the second elastic state.

[0172] The contact segment 4012 has a straight structure and is in sliding contact with the circumferential wall of the guide shaft 2. When the action bead 3 undergoes a second displacement Y due to the second degree of freedom, or when the action bead 3 rotates due to the third degree of freedom, the contact segment 4012 adapts to the occurrence of the second displacement Y or rotation action in the first sliding state or the second sliding state.

[0173] In this embodiment, a first specific structural form of the suspended support structure 4 is provided.

[0174] The suspension support structure 4 is composed of a first support member 401 , wherein the first support member 401 has at least a connecting section 4011 and a contact section 4012 .

[0175] When the actuating ball 3 is subjected to an unbalanced force, the elastic properties and curved shape of the connecting section 4011 cause the elastically adapted space formed between its inner wall and the circumferential wall of the guide shaft 2 to compress or rebound, dissipating or balancing the force. Simultaneously, the actuating ball 3 deflects to one side to further dissipate the force, ensuring that its reciprocating motion is not significantly affected.

[0176] It can be seen that the process of compression or rebound of the elastic adaptation space represents the occurrence of the first elastic state and the second elastic state.

[0177] When the action bead 3 rotates and moves linearly, the contact segment 4012 adapts to the occurrence of the above process by sliding contact with the guide shaft 2 and representing the occurrence of the first sliding state and the second sliding state to maintain the stability of the action bead 3.

[0178] The fifteenth embodiment of the present invention proposes a reciprocating motion structure, in which the elastic adaptation space is compressed to form a first elastic state; and the elastic adaptation space rebounds to form a second elastic state.

[0179] As shown in FIG. 7 and FIG. 8 , in this embodiment, as before, the elastic adaptation space has two elastic states.

[0180] Specifically, when the force exerted on the action bead 3 by the track ring groove 101 is greater than the force exerted on the action bead 3 by the silicone, the elastic adaptation space close to the track ring groove 101 tends to be compressed, that is, the first elastic state occurs, and the elastic adaptation space close to the silicone tends to rebound, that is, the second elastic state occurs to adapt to the imbalance of the force.

[0181] When the force exerted on the action bead 3 by the track ring groove 101 is less than the force exerted on the silicone, the elastic adaptation space close to the track ring groove 101 is more inclined to rebound, that is, the second elastic state occurs, and the elastic adaptation space close to the silicone is more inclined to compress, that is, the first elastic state occurs to adapt to the imbalance of the force.

[0182] The sixteenth embodiment of the present invention proposes a reciprocating motion structure, in which the contact segment 4012 slides along the axis of the guide shaft 2 to form a first sliding state, and the contact segment 4012 in the first sliding state does not move relative to the action bead 3; and the contact segment 4012 rotates with the axis of the guide shaft 2 as the rotation axis to form a second sliding state.

[0183] In this embodiment, as previously described, the contact segment 4012 has two sliding states. Specifically, when the actuating bead 3 moves linearly, the contact segment 4012 tends to slide along the axis of the guide shaft 2, i.e., enters the first sliding state to accommodate linear motion. When the actuating bead 3 rotates, the contact segment 4012 tends to rotate relative to the guide shaft 2, i.e., enters the second sliding state to accommodate rotational motion.

[0184] Furthermore, the fact that the contact segment 4012 in the first sliding state does not move relative to the actuating bead 3 should be understood as follows: since the first and second sliding states of the contact segment 4012 are premised on the motion state of the actuating bead 3, they are not affected by the elastic state of the elastic adaptation space. Specifically, when the actuating bead 3 performs linear reciprocating motion, it drives the contact segment 4012 to move synchronously, thus forming the first sliding state of the contact segment 4012. Since the actuating bead 3 and the contact segment 4012 maintain the same motion state, relative motion between the contact segment 4012 and the actuating bead 3 is not observed, relative to the contact segment 4012.

[0185] The seventeenth embodiment of the present invention proposes a reciprocating motion structure. When the elastic adaptation space transitions from the first elastic state to the second elastic state, the contact segment 4012 adapts to the dynamic changes of the elastic adaptation space in a fourth sliding state, and the contact segment 4012 in the fourth sliding state moves relative to the action bead 3; wherein, the contact segment 4012 slides along the axial direction of the guide shaft 2 to form the fourth sliding state.

[0186] In this embodiment, the transition between the first and second elastic states of the elastic adapting space simultaneously causes the contact segment 4012 to change state. Specifically, when the elastic adapting space compresses or rebounds, the contact segment 4012 also slides slightly along the axis of the guide shaft 2 to adapt to the change in the state of the elastic adapting space. This fourth sliding state helps further dissipate the applied force, thereby weakening the effect of the applied force on the actuating bead 3.

[0187] Furthermore, the relative motion between the contact segment 4012 and the actuating bead 3 in the fourth sliding state should be understood as occurring due to the influence of the elastic adaption space. Specifically, when the elastic adaption space compresses or rebounds, the connecting segment 4011 exerts a certain force on the contact segment 4012, causing the contact segment 4012 to slide slightly along the axis of the guide shaft 2, thereby adapting to the deformation of the elastic adaption space. Therefore, with the actuating bead 3 as a reference, the contact segment 4012 and the actuating bead 3 will experience relative motion.

[0188] As shown in Figures 9 and 10, the eighteenth embodiment of the present invention proposes a reciprocating motion structure, and the suspended support structure 4 is composed of a second support member 402, and the second support member 402 includes at least a partially elastic support claw, and the support claw is in sliding contact with the circumferential wall of the guide shaft 2.

[0189] In this embodiment, a second specific structural form of the suspended support structure 4 is provided.

[0190] The suspended support structure 4 is composed of a second support member 402 .

[0191] Specifically, the second support member 402 has an elastic support claw. The elastic portion of the support claw satisfies the requirement of providing elastic force to the actuating ball 3. In addition, the support claw also satisfies the requirement of reciprocating motion of the actuating ball 3 by forming a sliding contact with the guide shaft 2.

[0192] As shown in Figures 9 and 10, the nineteenth embodiment of the present invention proposes a reciprocating motion structure, in which the supporting claw has a claw end 4021 and a claw body 4022, the claw body 4022 is an elastic structure, and the claw end 4021 has a hard structure and is in sliding contact with the circumferential wall of the guide shaft 2.

[0193] In this embodiment, the supporting claw has a claw end 4021 and a claw body 4022 .

[0194] Considering that hard materials have less friction and less wear than elastic materials, when the claw end 4021 is made of a hard material, less frictional heat and less wear can be generated during the sliding process between the claw end 4021 and the guide shaft 2, thereby ensuring that the suspended support structure 4 has a longer service life.

[0195] Since the claw body 4022 does not directly contact the guide shaft 2 and does not cause sliding friction, when the claw body 4022 is made of an elastic material, the need for providing elastic force can be met without having to consider the problem of friction heat or friction loss.

[0196] As shown in Figures 11, 12, 13 and 14, the twentieth embodiment of the present invention provides a reciprocating motion structure, wherein the suspended support structure 4 is composed of a third support member 403, and the third support member 403 includes at least an annular member 4031 having an annular structure and an abutting member 4032 having a curved structure;

[0197] In which, the annular member 4031 is in sliding contact with the circumferential wall of the guide shaft 2, and the abutment member 4032 is connected to the assembly hole 301 to form a first connection structure; or the annular member 4031 is connected to the assembly hole 301, and the abutment member 4032 is in sliding contact with the circumferential wall of the guide shaft 2 to form a second connection structure.

[0198] In this embodiment, a third specific structural form of the suspension support structure 4 is provided.

[0199] The suspended support structure 4 is composed of a third support member 403 .

[0200] The third supporting member 403 has an annular member 4031 and an abutting member 4032 .

[0201] The different installation positions of the annular member 4031 and the abutting member 4032 constitute two connection forms.

[0202] First, the annular member 4031 serves as a connecting structure and is assembled on the inner wall surface of the assembly hole 301 , and the abutting member 4032 serves as a sliding structure and forms a sliding contact with the circumferential wall surface of the guide shaft 2 .

[0203] The advantages of this structure are: the connection area between the annular member 4031 and the assembly hole 301 is relatively large, thereby providing a strong connection between the suspension support structure 4 and the actuating bead 3. In addition, the contact area between the abutment member 4032 and the guide shaft 2 is small, thereby generating less frictional heat and reducing structural losses.

[0204] Secondly, the abutment member 4032 serves as a connecting structure and is assembled on the inner wall surface of the assembly hole 301 , and the annular member 4031 serves as a sliding structure and forms a sliding connection with the circumferential wall surface of the guide shaft 2 .

[0205] The advantage of this structure is that the contact area between the annular member 4031 and the guide shaft 2 is large, so the force distribution is relatively uniform, which can ensure the stability of the reciprocating motion of the action ball 3.

[0206] The twenty-first embodiment of the present invention proposes a reciprocating motion structure, when the suspended support structure 4 is in the first connection structure, the annular member 4031 is a hard material and the abutment member 4032 is an elastic material; and when the suspended support structure 4 is in the second connection structure, the annular member 4031 is an elastic material and the abutment member 4032 is a hard material.

[0207] In this embodiment, considering the two installation forms of the third support member 403 , the materials of the annular member 4031 and the abutting member 4032 need to be adjusted accordingly.

[0208] Specifically, when the abutment member 4032 and the guide shaft 2 come into sliding contact, considering that hard materials have less friction and less wear than elastic materials, when the abutment member 4032 is made of a hard material, less frictional heat and less wear are generated during the sliding process between the abutment member 4032 and the guide shaft 2, thereby ensuring a longer service life for the suspended support structure 4.

[0209] On the contrary, when the annular member 4031 is in sliding contact with the guide shaft 2, a hard material is used due to the same principle.

[0210] The twenty-second embodiment of the present invention proposes a reciprocating motion structure, wherein the guide shaft 2 is a cylindrical structure or the guide shaft 2 is a polygonal column structure;

[0211] When the guide shaft 2 is a cylindrical structure, the actuating ball 3 is in rolling contact with the track ring groove 101;

[0212] When the guide shaft 2 is a non-cylindrical structure, the actuating ball 3 is in sliding contact with the track ring groove 101 .

[0213] In this embodiment, the guide shaft 2 has two structural forms.

[0214] First, the guide shaft 2 is cylindrical. This structure is relatively conventional and can satisfy the requirements for rolling or sliding contact between the actuating ball 3 and the track ring groove 101. However, given that the cylindrical guide shaft 2 provides relatively little constraint on the actuating ball 3, when the actuating ball 3 is in sliding contact, the reduced degree of constraint from the guide shaft 2 results in greater force acting on the actuating ball 3, leading to unexpected rolling friction and, to a certain extent, increased frictional heat generation.

[0215] Based on this, another possible form of guide shaft 2 is a polygonal column structure. For example, the guide shaft 2 can be in the form of a triangular column, a quadrilateral column, or a pentagonal column. It is foreseeable that a polygonal column structure will provide a relatively strong constraint on the actuating bead 3. When the actuating bead 3 is in a sliding configuration, it is less likely to generate unexpected rolling friction due to large forces, thereby reducing the generation of frictional heat to a certain extent.

[0216] The twenty-third embodiment of the present invention proposes a reciprocating motion structure. When the guide shaft 2 is a polygonal column structure, a suspension support structure 4 is provided on at least each side of the polygonal column structure.

[0217] In this embodiment, the suspension support structure 4 is provided on each side of the polygonal column structure to ensure that the suspension support structure 4 provides balanced elastic force to the action bead 3, thereby ensuring the stability of the reciprocating motion of the action bead 3.

[0218] As shown in FIG3 to FIG6 , the twenty-fourth embodiment of the present invention provides a massage device 5, comprising at least:

[0219] Handle 501;

[0220] A driving member is provided in the hand-held handle 501;

[0221] The reciprocating structure of any one of the above embodiments is connected to the driving end of the driving member;

[0222] The housing 502 is connected to the handle, and the reciprocating structure is disposed in the housing 502 . The housing 502 has an opening 5021 for exposing the action bead 3 .

[0223] The silicone sleeve 503 covers the housing 502 and contacts the actuating bead 3 .

[0224] The massage device 5 proposed in this embodiment has all the beneficial effects mentioned above, which will not be described in detail here.

[0225] In describing the embodiments of the present invention, the term "and / or" is used herein to describe a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " generally indicates that the associated objects are in an "or" relationship.

[0226] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A reciprocating motion structure, characterized in that: include: A main shaft, wherein a plurality of inclined and closed-loop track ring grooves are arranged at intervals on the circumferential wall surface of the main shaft and along the axial direction thereof; A guide shaft is arranged on one side of the main shaft in a state of being parallel to the main shaft; An action ball is sleeved on the guide shaft, wherein the action ball is in sliding contact or rolling contact with the track ring groove, and when the main shaft is driven by a driving member to rotate, the action ball reciprocates along the axial direction of the guide shaft; Also includes: A suspension support structure is slidably disposed between the action bead and the guide shaft, and is used to apply an elastic force to the guide shaft so that the action bead can be maintained on the circumferential wall surface of the guide shaft in a suspended state.

2. The reciprocating motion structure according to claim 1, characterized in that: When the action bead is in sliding contact with the track ring groove, the action bead is eccentrically structured and sleeved on the guide shaft. Taking the central axis of the guide shaft as the reference line, the volume of the action bead located on one side of the central axis and close to the track ring groove is recorded as V1, and the volume of the action bead located on the other side of the central axis and away from the track ring groove is recorded as V2, and V1>V2.

3. The reciprocating motion structure according to claim 2, characterized in that: The suspension support structure is used to provide at least a first degree of freedom, a second degree of freedom and / or a third degree of freedom to the action bead; Wherein, the first degree of freedom is configured to allow the actuating bead to undergo a first displacement X along the radial direction of the guide axis; and The second degree of freedom is configured to allow the actuating bead to be moved axially along the guide shaft. A second displacement Y occurs; and / or The third degree of freedom is configured to allow the actuating bead to rotate about the axis of the guide shaft.

4. The reciprocating motion structure according to claim 3, characterized in that: The suspended support structure at least partially exhibits an elastic structure, and the elastic structure allows the first displacement X to occur in a deformed manner; and The elastic structure has at least one contact point or one contact surface, and the contact point or the contact surface is in sliding contact with the circumferential wall surface of the guide shaft, allowing the second displacement Y to occur and the action ball to rotate in a sliding manner.

5. The reciprocating motion structure according to claim 3 or 4, characterized in that: When the actuating bead is in sliding contact with the track ring groove, the first degree of freedom and the second degree of freedom provided by the suspension support structure to the actuating bead are retained, and the third degree of freedom is cancelled.

6. The reciprocating motion structure according to claim 5, characterized in that: The track ring groove has at least a first limiting surface that is in sliding contact with a portion of the circumferential wall surface of the actuating ball, and the first limiting surface is configured to apply a first force to the actuating ball and cause the actuating ball to move along the direction of the first force; and The track ring groove has at least a second limiting surface that is in sliding contact with a portion of the circumferential wall surface of the action ball, and the second limiting surface is configured to apply a second force to the action ball and cause the action ball to move along the direction of the second force; The directions of the first acting force and the second acting force are consistent with the axial direction of the guide shaft, and the directions of the first acting force and the second acting force are opposite to each other, so as to form the reciprocating motion of the action ball.

7. The reciprocating motion structure according to claim 3 or 4, characterized in that: When the actuating bead is in rolling contact with the track ring groove, the first degree of freedom, the second degree of freedom and the third degree of freedom provided by the suspension support structure to the actuating bead are retained.

8. The reciprocating motion structure according to claim 7, characterized in that: The raceway annular groove has at least a third limiting surface that contacts a portion of the circumferential wall surface of the actuating ball, and the third limiting surface is configured to roll and rub against the actuating ball.

9. The reciprocating motion structure according to claim 3, characterized in that: The suspension support structure is composed of a first support member, which at least includes a connecting section and a contact section; Wherein, the connecting section presents an arc-shaped structure, and an elastic adaptation space is formed between the connecting section and the circumferential wall surface of the guide shaft. When the action bead undergoes a first displacement X due to the first degree of freedom, the elastic adaptation space adapts to the occurrence of the first displacement X in a first elastic state or a second elastic state; The contact segment has a straight structure and is in sliding contact with the circumferential wall of the guide shaft. When the action bead undergoes a second displacement Y due to the second degree of freedom, or when the action bead rotates due to the third degree of freedom, the contact segment is in a first sliding state or a second sliding state to adapt to the occurrence of the second displacement Y or rotation action.

10. The reciprocating motion structure according to claim 9, characterized in that: The elastic adaptation space is compressed to form the first elastic state; and The elastic adaptation space rebounds to form the second elastic state.

11. The reciprocating motion structure according to claim 3, characterized in that: The suspension support structure is composed of a second support member, and the second support member includes at least a partially elastic support claw, and the support claw is in sliding contact with the circumferential wall surface of the guide shaft.

12. The reciprocating motion structure according to claim 3, characterized in that: The suspension support structure is composed of a third support member, the third support member at least includes a ring member presenting a ring structure and an abutment member presenting a curved structure, and the action bead is formed with an assembly hole; wherein the annular member is in sliding contact with the circumferential wall surface of the guide shaft, and the abutment member is connected with the assembly hole to form a first connection structure; or The annular member is connected to the assembly hole, and the abutment member is in sliding contact with the circumferential wall surface of the guide shaft to form a second connection structure.

13. The reciprocating motion structure according to claim 2, characterized in that: The guide shaft is a cylindrical structure or the guide shaft is a polygonal column structure; Wherein, when the guide shaft is a cylindrical structure, the action ball is in rolling contact with the track ring groove; When the guide shaft is a non-cylindrical structure, the actuating ball is in sliding contact with the track ring groove.

14. A massage device, characterized in that: At least: Handle handle; A driving member, disposed in the hand-held handle; A reciprocating structure as claimed in any one of claims 1 to 13, connected to the driving end of the driving member; A shell connected to the hand-held handle, and the reciprocating structure is arranged in the shell, wherein the shell is provided with an opening for exposing the action bead of the reciprocating structure; The silicone sleeve is coated on the shell and is in contact with the action bead.

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