Coupling structure and shaving device

Abstract

A coupling structure and a shaving device according to the present invention. The coupling structure includes a first coupling member and a second coupling member. The first coupling member is provided with a connecting shaft, and the second coupling member is provided with a connecting cavity. The shape of the connecting shaft is adapted to the shape of the connecting cavity and can be connected or separated from each other. At least two protrusions protruding radially are provided on the connecting shaft, and spring catches corresponding to the positions of the protrusions are provided in the connecting cavity. When the connecting shaft is inserted into the connecting cavity, the protrusions force the corresponding spring catches to deform until they are latched with the spring catches. The spring catches can maintain the required elastic force, thereby ensuring that the first coupling member and the second coupling member can always maintain a stable connection state.

Description

Technical Field

[0001] The present invention belongs to the technical field of personal care products, and particularly relates to a connection structure and a shaving device. Background Art

[0002] Personal care products, such as shaving devices, generally include a cutter head and a handle. The cutter head and the handle are mostly detachably connected by buckling between a connecting buckle plate and a buckle plate base. However, in the existing such buckling method, if the shaving device is used for too long, the connecting buckle plate will have a weakened elasticity due to use fatigue, and thus it cannot maintain a stable buckling with the buckle plate base, resulting in a shortened service life of the shaving device. At the same time, during connection, when the connecting buckle plate contacts the buckle plate base and further buckling is required, the resistance is large and a relatively large force needs to be applied to complete it; during separation, a relatively large force also needs to be applied to separate the connecting buckle plate and the buckle plate base in the buckled state. Moreover, once the operation is not careful, the buckling position of the connecting buckle plate and the buckle plate base is prone to damage, resulting in the inability to continue connecting and using. Summary of the Invention

[0003] The purpose of the present invention is to provide a connection structure and a shaving device, aiming to solve the technical problem that personal care products such as shaving devices in the prior art are difficult to maintain a stable connection state after frequent assembly and disassembly.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: a connection structure, including a first connection component and a second connection component. At least one of the first connection component and the second connection component is provided with a connection shaft, and the other of the first connection component and the second connection component is provided with a connection cavity. The shape of the connection shaft is adapted to the shape of the connection cavity and can be connected or separated from each other;

[0005] At least two protruding buckles protruding radially are provided on the connection shaft, and elastic sheet buckles corresponding to the positions of the protruding buckles are provided in the connection cavity. When the connection shaft is inserted into the connection cavity, the protruding buckles force the corresponding elastic sheet buckles to deform until they are buckled with the elastic sheet buckles.

[0006] Advantages of the present invention: In the connection structure of the present invention, the connection or separation between the first connection component and the second connection component is achieved through the connection or separation between the connection shaft and the connection cavity, and the connection or separation between the connection shaft and the connection cavity is achieved through the buckling between the convex buckle and the elastic sheet buckle. Among them, the buckling between the convex buckle and the elastic sheet buckle is that when the connection shaft is inserted into the connection cavity, the convex buckle presses and forces the elastic sheet buckle to deform. As the depth of the connection shaft inserted into the connection cavity increases, the convex buckle releases the pressure on the elastic sheet buckle. At the same time, under the elastic force of the elastic sheet buckle, the elastic sheet restores its shape and restricts the convex buckle, so that the convex buckle and the elastic sheet buckle are buckled together. Since the connection or separation between the convex buckle and the elastic sheet buckle is achieved by forcing the elastic sheet buckle to deform, and the elastic sheet buckle itself is an elastic component structure, it will not show the phenomenon of elastic force fatigue due to its frequent deformation. Therefore, it can effectively ensure that even if the first connection component and the second connection component are frequently assembled and disassembled, the elastic sheet buckle can maintain its due elastic force, and further ensure that when the first connection component and the second connection component are in the connected state, they can always maintain a stable connection state. Moreover, the connection method of this connection structure is easy to implement. During the installation process, as long as a certain pressure is applied when the connection shaft is inserted into the connection cavity to force the elastic sheet buckle to deform through the convex buckle, the connection can be achieved; during the disassembly process, mainly apply a force to the connection shaft and pull it out axially, and force the elastic sheet buckle to deform again through the convex buckle until the convex buckle and the elastic sheet buckle are separated.

[0007] Another technical solution adopted by the present invention is: a shaving device, including a cutter head assembly and a handle assembly. The cutter head assembly includes at least one of the first connection component or the second connection component in the above connection structure, and the handle assembly includes the other first connection component or the second connection component in the above connection structure. The cutter head assembly and the handle assembly are connected or separated through the connection or separation between the first connection component and the second connection component.

[0008] In the shaving device of the present invention, due to the use of the above connection structure, even if the cutter head assembly and the handle assembly are frequently assembled and disassembled, it is still possible to rely on the elastic component in the connection structure to ensure that the first connection component and the second connection component are in the connected state, and further enable the cutter head assembly and the handle assembly to always maintain a stable connection state. Moreover, the entire assembly and disassembly operation is very convenient and has strong practicability. Description of the Drawings

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0010] Figure 1 Structural schematic diagram of the connection structure provided by the embodiment of the present invention.

[0011] Figure 2 It is Figure 1 A sectional view taken along line A-A in

[0012] Figure 3 Exploded schematic diagram of the connection structure provided by the embodiment of the present invention Figure 1 .

[0013] Figure 4 Exploded schematic diagram of the connection structure provided by the embodiment of the present invention Figure 2 .

[0014] Figure 5 Structural schematic diagram of the first connection component of the connection structure provided by the embodiment of the present invention.

[0015] Figure 6 Structural schematic diagram of the second connection component of the connection structure provided by the embodiment of the present invention.

[0016] Figure 7 Structural schematic diagram of the elastic buckle, fixed plate and sealing ring of the connection structure provided by the embodiment of the present invention connected to each other.

[0017] Figure 8 It is Figure 7 A sectional view taken along line B-B in

[0018] Figure 9 Sectional view of the shaving device provided by the embodiment of the present invention.

[0019] Figure 10 Exploded schematic diagram of the shaving device provided by the embodiment of the present invention.

[0020] Among them, each reference numeral in the figure:

[0021] 10 - First connection component 11 - Connection shaft 12 - Trimming plane

[0022] 20 - Second connection component 21 - Connection cavity 22 - Limiting plane

[0023] 23 - Clearance position 30 - Convex buckle 40 - Elastic sheet buckle

[0024] 41 - Elastic part 42 - Fixed part 43 - Buckling position

[0025] 44 - Connection hole 50 - Fixed plate 51 - Connection column

[0026] 60 - Sealing ring 100 - Cutter head assembly 111 - Upper limit area

[0027] 200 - Handle assembly 211 - Lower limit area 411 - Vertical section

[0028] 412 - V-shaped section. Detailed implementation mode

[0029] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The following is through reference to the attached Figures 1 - 10 The described embodiments are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] As Figures 1 - 2 shown, a coupling structure provided by an embodiment of the present invention is applicable to personal care products such as shaving devices, etc. The personal care product can also be a trimmer, a beauty instrument, etc. The coupling structure includes a first coupling member 10 and a second coupling member 20. The first coupling member 10 and the second coupling member 20 can be respectively arranged on the cutter head assembly 100 and the handle assembly 200 of the personal care product (see Figures 9 - 10) for enabling the cutter head assembly 100 and the handle assembly 200 to be connected or separated. The first coupling member 10 and the second coupling member 20 can be a component in either the cutter head assembly 100 or the handle assembly 200 of a personal care product, or can be additional components added to enable connection or separation between the cutter head assembly 100 and the handle assembly 200.

[0034] Wherein, as Figure 2 shown, perforations corresponding to each other in position can be provided on the first coupling member 10 and the second coupling member 20 for communication. Through these perforations, other components of the cutter head assembly 100 and the handle assembly 200 can be installed or passed through. For example, the perforations can be used for the arrangement and installation of components such as a rotating shaft, a connecting shaft 11, and a cutter holder. The specific method is selected according to different structural designs of different personal care products.

[0035] Furthermore, as Figures 1 - 3 shown, at least one of the first coupling member 10 and the second coupling member 20 is provided with a connecting shaft 11, and the other of the first coupling member 10 and the second coupling member 20 is provided with a connecting cavity 21. That is, the first coupling member 10 is provided with the connecting shaft 11, and the second coupling member 20 is provided with the connecting cavity 21; or, the first coupling member 10 is provided with the connecting cavity 21, and the second coupling member 20 is provided with the connecting shaft 11. In this embodiment, the case where the first coupling member 10 is provided with the connecting shaft 11 and the second coupling member 20 is provided with the connecting cavity 21 is taken as an example for description.

[0036] As Figures 1 - 3 shown, the shape of the connecting shaft 11 is adapted to the shape of the connecting cavity 21 and can be connected or separated from each other; the connecting shaft 11 and the connecting cavity 21 can be mutually adapted to ensure that after the connecting shaft 11 and the connecting cavity 21 are adaptively connected, there will be no shaking or rotation that affects the use of the product, and to ensure that the connecting shaft 11 and the connecting cavity 21 after connection can be disassembled and separated under the action of an external force.

[0037] Furthermore, as Figures 1 - 2As shown, the direction of connection or separation between the connecting shaft 11 and the connecting cavity 21 is defined as the axial direction, and the center line of the axial direction is the central axis P. The central axis P mentioned above or below shall be referenced accordingly, and the direction perpendicular to this axial direction is defined as the radial direction. Among them, at least two buckles 30 protruding radially are provided on the connecting shaft 11, and elastic buckles 40 corresponding to the positions of the buckles 30 are provided in the connecting cavity 21. When the connecting shaft 11 is inserted into the connecting cavity 21, the buckles 30 force the corresponding elastic buckles 40 to deform until they are buckled with the elastic buckles 40. When the connecting shaft 11 is inserted into the connecting cavity 21 along the axial direction, the buckles 30 force the corresponding elastic buckles 40 to deform (in this embodiment, the elastic buckles 40 deform radially) until they are buckled with the buckles 30. After the elastic buckles 40 and the buckles 30 are buckled with each other, they can also prevent the first connecting member 10 and the second connecting member 20 from rotating around the central axis P, so as to indirectly maintain the stability of the buckle connection between the elastic buckles 40 and the buckles 30. The design is ingenious and highly practical.

[0038] The state after the buckles 30 and the corresponding elastic buckles 40 are buckled is to achieve upper and lower abutment in the direction of the central axis P. In this way, it is ensured that the buckles 30 and the elastic buckles 40 do not have relative displacement in the direction of the central axis P without external force.

[0039] As Figures 1 - 3 As shown, the specific process of connection and separation of the connection structure is that the mutual connection or separation between the first connecting member 10 and the second connecting member 20 is realized through the mutual connection or separation between the connecting shaft 11 and the connecting cavity 21, and the mutual connection or separation between the connecting shaft 11 and the connecting cavity 21 is realized through the buckling between the buckles 30 and the elastic buckles 40. Among them, the buckling between the buckles 30 and the elastic buckles 40 is that when the connecting shaft 11 is inserted into the connecting cavity 21, the buckles 30 press and force the elastic buckles 40 to deform. As the depth of the connecting shaft 11 inserted into the connecting cavity 21 increases, the buckles 30 release the pressure on the elastic buckles 40. At the same time, under the action of the elastic force of the elastic buckles 40, the elastic piece returns to its original shape and restricts the buckles 30. In this way, the buckles 30 and the elastic buckles 40 are buckled with each other. Since the connection or separation between the buckles 30 and the elastic buckles 40 is realized by forcing the elastic buckles 40 to deform, and the elastic buckles 40 themselves are elastic part structures and will not show the phenomenon of elastic force fatigue due to their frequent deformation, it can effectively ensure that even if the first connecting member 10 and the second connecting member 20 are frequently assembled and disassembled, the elastic buckles 40 can maintain the required elastic force, and then it can ensure that when the first connecting member 10 and the second connecting member 20 are in the connected state, they can always maintain a stable connection state.

[0040] That is to say, the disassembly and assembly between the first connecting component 10 and the second connecting component 20 in the connecting structure of this embodiment will not cause fatigue of the elastic clip 40 and affect its performance. During long-term use, the elastic clip 40 can still ensure the elastic force it originally has, that is, it can always reset and stably engage with the convex buckle 30. Preferably, the elastic clip 40 is an elastic clip made of metal. The elastic clip 40 made of metal has excellent elastic force and still has good elastic force after long-term use.

[0041] Of course, in other embodiments, the elastic member can also be a plastic elastic member, as long as it has sufficient elastic force to reset after deformation and still has sufficient good elastic force after frequent use.

[0042] Among them, the connection method of the connecting structure in this embodiment is easy to implement. During the installation process, as long as a certain pressure is applied when inserting the connecting shaft 11 into the connecting cavity 21, the buckle is forced to deform through the convex buckle 30 to achieve snap connection; during the disassembly process, mainly apply a force to the connecting shaft 11 and pull it out axially, and the elastic clip 40 is forced to deform again through the convex buckle 30 until the convex buckle 30 is separated from the elastic clip 40. It has the advantage of being easy to operate, and it will not be laborious during use, being relaxed and free.

[0043] Preferably, as Figure 2 and Figure 4 shown, two convex buckles 30 are provided on the connecting shaft 11, and the two convex buckles 30 are symmetrically arranged in the radial direction. The number of elastic clips 40 can be set to one, as long as it can simultaneously engage with the two convex buckles 30, so that the connecting shaft 11 can be restricted at least at two circumferential points. In this way, on the one hand, it can ensure that the relative rotation between the first connecting component 10 and the second connecting component 20 is avoided through the mutually engaged elastic clip 40 and convex buckle 30; on the other hand, it can also ensure the stability of the connection between the first connecting component 10 and the second connecting component 20, and there will be no looseness at the local position. At the same time, the number of convex buckles 30 is also set to the minimum, reducing the complexity of the connecting structure, reducing the structure, and being easy to manufacture.

[0044] Of course, in other embodiments, three or more convex buckles 30 are provided on the connecting shaft 11 and are equally spaced along the circumferential direction of the connecting shaft 11. Correspondingly, the number of elastic clips 40 provided in the connecting cavity 21 can be more than one. Such a design can also ensure that the first connecting component 10 can be frequently disassembled and assembled with the second connecting component 20 without affecting the stability after connection.

[0045] In this embodiment, as Figures 2 - 4As shown, at least one trimming plane 12 is provided on the connecting shaft 11, and a limiting plane 22 is provided on the connecting cavity 21, which cooperates with each trimming plane 12 and is used to limit the connecting shaft 11 to rotate around the central axis P within the connecting cavity 21. In the connected state of the connecting structure, at least one trimming plane 12 and one limiting plane 22 are arranged facing each other. Then, when there is an external force forcing the first connecting component 10 and the second connecting component 20 to rotate relative to each other around the central axis P, the limiting plane 22 and the trimming plane 12 can limit each other to prevent the first connecting component 10 and the second connecting component 20 from rotating relative to each other, thus avoiding the relative rotation of the first connecting component 10 and the second connecting component 20 from affecting the connection stability between the two or damaging local components on the first connecting component 10 and the second connecting component 20.

[0046] Preferably, as Figure 2 shown, the shapes of the connecting shaft 11 and the connecting cavity 21 are circular structures. The trimming plane 12 can be formed on the outer wall of the connecting shaft 11, and the limiting plane 22 can be formed on the inner wall of the connecting cavity 21.

[0047] More preferably, as Figures 5 - 6 shown, the number of trimming planes 12 is two, and the two trimming planes 12 are arranged radially symmetrically. Similarly, the number of limiting planes 22 is also two, and the two limiting planes 22 are arranged radially symmetrically. In this way, after the circular connecting shaft 11 and the connecting cavity 21 are respectively provided with two trimming planes 12 and two limiting planes 22, they form a rounded rectangular shape similar to a stadium (playground).

[0048] In this embodiment, as Figures 7 - 8 shown, the elastic clip 40 includes an elastic part 41 and a fixing part 42 connected to the elastic part 41. Preferably, the elastic part 41 and the fixing part 42 are integrally formed. Such a design can ensure the stable connection between the elastic part 41 and the fixing part 42 on the one hand, and on the other hand, it can ensure that after the elastic part 41 deforms, it can quickly reset with good elastic force to ensure that it can be buckled with the convex buckle 30.

[0049] Among them, the fixing part 42 is fixedly connected inside the connection cavity 21. According to the actual structure of the connection cavity 21, the fixing part 42 can be fixed on the cavity wall (bottom wall or side wall) of the connection cavity 21, or can be fixed on the central part fixedly connected to the second coupling member 20. This central part is located inside the connection cavity 21 or at the bottom of the connection cavity 21, etc., to ensure that the fixing part 42 is fixed at a position inside the connection cavity 21 in a fixed state and does not affect the installation of the connection shaft 11. The elastic part 41 extends into the connection cavity 21 to form a cantilever shape. The end of the elastic part 41 is in a free state, which is opposite to the fixed state of the fixing part 42. In this way, when the end of the elastic part 41 is deformed under the action of a force, due to the action of the fixing part 42, after the compressive force is removed, the elastic part 41 can be quickly reset in time. At this time, the buckle position 43 provided on the elastic part 41 that can be reset after being deformed by the pressing of the through buckle 30 and can be buckled with the buckle 30 realizes the buckling with the buckle 30.

[0050] Preferably, as Figures 7 - 8 shown, the spring clip 40 may include a plurality of elastic parts 41 and a fixing part 42 connected to each elastic part 41. The fixing part 42 is in a plate shape, and the elastic parts 41 are vertically connected to the periphery of the plate-shaped fixing part 42. For example, two elastic parts 41 are symmetrically connected to the periphery of a fixing part 42, or more than three elastic parts 41 are circumferentially and evenly spaced on the periphery of a fixing part 42.

[0051] More preferably, the plurality of elastic parts 41 are integrally formed with a fixing part 42, and a plurality of elastic parts 41 can be formed by stamping on a fixing part 42.

[0052] In this embodiment, as Figure 3As shown, at least one convex buckle 30 is provided on a trimming plane 12. Preferably, one convex buckle 30 is provided on each trimming plane 12. The trimming plane 12 is arranged such that the spatial region of the outer wall of the connecting shaft 11 at the position of the trimming plane 12 is increased, providing an installation space that is more conducive to arranging the convex buckle 30. Similarly, at least one limiting plane 22 is provided with an avoidance space 23, and at least one elastic part 41 is located in the avoidance space 23. The arrangement of the limiting plane 22 increases the spatial region of the inner wall of the connecting cavity 21 at the position of the limiting plane 22, and further an avoidance space 23 is provided on the limiting plane 22. In this way, it provides an installation space that is more conducive to arranging the elastic part 41 of the elastic sheet buckle 40 and a space for the elastic part 41 to deform. Moreover, the provided trimming plane 12 corresponds to the limiting plane 22. When the connecting shaft 11 needs to be inserted into the connecting cavity 21, the trimming plane 12 and the limiting plane 22 achieve pre-positioning. It is realized that as long as the trimming plane 12 and the limiting plane 22 are aligned with each other, the alignment between the convex buckle 30 and the elastic part 41 of the elastic sheet buckle 40 can be completed. Then, when the connecting shaft 11 is inserted into the connecting cavity 21 without the need to separately correspond the convex buckle 30 and the elastic part 41 of the elastic sheet buckle 40, the convex buckle 30 and the elastic part 41 of the elastic sheet buckle 40 can finally achieve buckling connection.

[0053] Furthermore, the fixing part 42 is fixed to the bottom inside the connecting cavity 21. According to the actual structure of the connecting cavity 21, the fixing part 42 can be fixed on the bottom wall of the connecting cavity 21, or it can also be fixed on a central part fixedly connected to the second connecting component 20. This central part is located at the bottom position of the connecting cavity 21 to ensure the fixed state of the fixing part 42 without affecting the installation of the connecting shaft 11. As Figure 2 shown, the elastic part 41 is arranged to extend axially along a direction parallel to the central axis P to form a cantilever shape. The elastic part 41 extends axially from the bottom to the top, and its end is in a free state. In this way, the elastic part 41 can swing (after being subjected to force compression) with the connection point with the fixing part 42 as the origin, and after the acting force is removed, the elastic part 41 can quickly return to its original position in a timely manner, ensuring that the buckle position 43 provided on the elastic part 41 can achieve buckling connection with the convex buckle 30 or be separated from the buckling state.

[0054] Preferably, as Figure 4 and Figures 7 - 8As shown, the elastic part 41 includes a vertical section 411 and a V-shaped section 412. The bottom end of the vertical section 411 is connected to the fixed part 42, and the top end extends along the axial direction parallel to the central axis P. The V-shaped section 412 is connected to the top end of the vertical section 411, and the tip of the V-shaped section 412 extends in the radial direction perpendicular to the central axis P to form a buckling position 43. When the V-shaped section 412 is connected to the vertical section 411, the state is approximately perpendicular or vertical, that is, the extending direction of the tip or the opening of the V-shaped section 412 is approximately perpendicular or vertical to the extending direction of the vertical section 411. The V-shaped section 412 is connected to the fixed part 42 through the vertical section 411, and through the vertical section 411, the V-shaped section 412 is in a cantilever state. In this way, the buckling position 43 formed at the tip of the V-shaped section 412 can be pressed by the convex buckle 30, and at the same time, the vertical section 411 deforms. Thus, as the connecting shaft 11 continues to be inserted into the connecting cavity 21, the deformed vertical section 411 resets. At this time, the buckling position 43 of the V-shaped section 412 is buckled above the convex buckle 30, and the connecting shaft 11 and the connecting cavity 21 are completed for connection. Similarly, when a force is applied to pull out the connecting shaft 11, the convex buckle 30 presses the buckling position 43 at the tip of the V-shaped section 412 again, and at the same time, the vertical section 411 deforms. Thus, as the connecting shaft 11 continues to be pulled away from the connecting cavity 21, the deformed vertical section 411 resets. At this time, the buckling position 43 of the V-shaped section 412 is disengaged from the buckling connection with the convex buckle 30, and the connecting shaft 11 and the connecting cavity 21 are completed for separation.

[0055] In this embodiment, as Figures 7 - 8 shown, the tip of the V-shaped section 412 is a tip with an arc surface formed by a bending process. Specifically, the setting of the tip with an arc surface on the V-shaped section 412 is mainly used to reduce the frictional force when contacting the convex buckle 30. When the connecting shaft 11 is inserted into the connecting cavity 21, the convex buckle 30 abuts against the upper inclined surface of the V-shaped section 412. By continuously applying a force, the convex buckle 30 presses the upper inclined surface of the V-shaped section 412 to force the vertical section 411 to deform. Then, under the action of the arc surface at the tip, it is easier to achieve mutual sliding between the convex buckle 30 and the V-shaped section 412, and further easier to force the vertical section 411 to deform until the connecting shaft 11 is inserted into the connecting cavity 21 and is adaptively connected to the connecting cavity 21. When it is necessary to separate the connection between the connecting shaft 11 and the connecting cavity 21. Apply a force to pull out the connecting shaft 11 towards the outside. Similarly, at this time, the upper end surface of the convex buckle 30 on the connecting shaft 11 abuts against the lower inclined surface of the V-shaped section 412 and forces the vertical section 411 to deform. Then, still under the action of the arc surface at the tip, it is easier to achieve mutual sliding between the convex buckle 30 and the V-shaped section 412, and further easier to force the vertical section 411 to deform until the connecting shaft 11 is completely pulled out of the connecting cavity 21, so that the connecting shaft 11 and the connecting cavity 21 are separated.

[0056] More specifically, as Figures 7 - 8As shown, the arc surface at the tip of the V-shaped section 412 specifically refers to the arc surface transition formed between the upper inclined surface and the lower inclined surface of the V-shaped section 412. The design of this structure is beneficial to the connection and separation operations between the connecting shaft 11 and the connecting cavity 21, reduces the force applied when inserting and removing the connecting shaft 11, improves the convenience of use, and has strong practicability.

[0057] In this embodiment, as Figure 2 shown, a lower limit region 211 for accommodating the convex buckle 30 is formed between the V-shaped section 412 and the fixing portion 42. The lower limit region 211 is mainly used to limit the axial displacement of the convex buckle 30. The limiting height of the lower limit region 211 is the distance between the lower inclined surface of the V-shaped section 412 and the fixing portion 42. When the connecting shaft 11 is completely inserted into the connecting cavity 21, the convex buckle 30 is accommodated in the lower limit region 211, and the limiting height of the lower limit region 211 is greater than the thickness between the upper end surface and the lower end surface of the convex buckle 30. In this way, the lower limit region 211 can preferably adapt to accommodate the convex buckle 30. The lower inclined surface of the V-shaped section 412 is used to limit the upper end surface of the convex buckle 30, and the fixing portion 42 is used to limit the lower end surface of the convex buckle 30, so as to prevent the convex buckle 30 from having a large axial displacement (towards the lower inclined surface of the V-shaped section 412 or towards the fixing portion 42) without being affected by an external force.

[0058] Furthermore, as Figure 2 shown, an upper limit region 111 for accommodating the V-shaped section 412 is provided on the connecting shaft 11 above the convex buckle 30. When the V-shaped section 412 is accommodated in the upper limit region 111, the buckle position 43 on the V-shaped section 412 is always located within the upper limit region 111. The upper limit region 111 is mainly used to limit the axial displacement of the V-shaped section 412. The limiting height of the upper limit region 111 is the distance between the upper end surface of the convex buckle 30 and the stepped surface above the convex buckle 30 formed after the connecting shaft 11 is provided with the edge-cutting plane 12. When the connecting shaft 11 is completely inserted into the connecting cavity 21, the V-shaped section 412 is accommodated in the upper limit region 111, and the limiting height of the upper limit region 111 is greater than the maximum thickness between the upper inclined surface and the lower inclined surface of the V-shaped section 412. In this way, the upper limit region 111 can preferably adapt to accommodate the V-shaped section 412. The upper end surface of the convex buckle 30 is used to limit the lower inclined surface of the V-shaped section 412, and the stepped surface above the convex buckle 30 formed after the connecting shaft 11 is provided with the edge-cutting plane 12 is used to limit the upper inclined surface of the V-shaped section 412, so as to prevent the V-shaped section 412 from having a large axial displacement (towards the upper end surface of the convex buckle 30 or towards the stepped surface above the convex buckle 30 formed after the connecting shaft 11 is provided with the edge-cutting plane 12) without being affected by an external force. As Figure 2As shown, through the settings of the upper limit area 111 and the lower limit area 211, the buckle 43 of the V-shaped section 412 and the convex buckle 30 are engaged with each other after being buckled, forming a biting state, similar to the meshing between the female buckle and the male buckle in a zipper, with excellent connection stability. Without being affected by an axial external force, there is no need to worry about the separation of the buckle 43 of the V-shaped section 412 and the convex buckle 30. Furthermore, the stability of the first connecting component 10 and the second connecting component 20 after connection can be effectively guaranteed.

[0059] At the same time, the settings of the upper limit area 111 and the lower limit area 211 also have the function of indicating whether the connecting shaft 11 and the connecting cavity 21 are connected in place. When the connecting shaft 11 is inserted into the connecting cavity 21, as the depth of the connecting shaft 11 inserted into the connecting cavity 21 is continuously increased, it can be judged by hand feeling whether the convex buckle 30 abuts against the lower limit of the lower limit area 211 (i.e., the surface of the fixing part 42). At the same time, by applying an axial force to the connecting shaft 11 in the reverse direction, it can be judged by hand feeling whether the convex buckle 30 abuts against the upper limit of the lower limit area 211 (i.e., the lower inclined surface of the V-shaped section 412), so as to judge whether the connecting shaft 11 and the connecting cavity 21 are properly connected.

[0060] Of course, during the above operation process, it can also be judged by hand feeling whether the V-shaped section 412 abuts against the lower limit of the upper limit area 111 (the upper end surface of the convex buckle 30). At the same time, by applying an axial force to the connecting shaft 11 in the reverse direction, it can be judged by hand feeling whether the V-shaped section 412 abuts against the upper limit of the upper limit area 111 (i.e., the step surface above the convex buckle 30 formed after the connecting shaft 11 is provided with the cutting edge plane 12), so as to judge whether the connecting shaft 11 and the connecting cavity 21 are properly connected.

[0061] Moreover, the settings of the upper limit area 111 and the lower limit area 211 are respectively realized by using the limit plane 22 and the cutting edge plane 12, without the need for independent design, avoiding structural complexity, effectively utilizing the advantages of the original structure, and further optimizing the design to form the upper limit area 111 and the lower limit area 211.

[0062] Preferably, as Figure 5 shown, each convex buckle 30 is in a wedge shape, that is, the front end of the convex buckle 30 has a certain tapered tip. After the wedge-shaped convex buckle 30 and the buckle 43 of the V-shaped section 412 are buckled with each other, when an axial force is applied, it can be forced to separate the convex buckle 30 from the buckle 43 of the locking V-shaped section 412, so as to realize the detachable connection between the buckle 43 of the V-shaped section 412 and the convex buckle 30.

[0063] In this embodiment, the elastic buckle 40 is made by integrally molding the elastic part 41 and the fixing part 42 with a metal material. The metal material has good elasticity and will not show fatigue even after long-term and frequent use, and still has good elastic restoring force. This can avoid the decrease in the buckling stability between the convex buckle 30 and the elastic buckle 40 due to the increase in the number of uses.

[0064] Furthermore, the convex buckle 30 and the connecting shaft 11 can be integrally molded with a plastic material. When manufacturing and molding the connecting shaft 11, the convex buckle 30 is integrally manufactured and molded at the same time, that is, the convex buckle 30 and the connecting shaft 11 are of an integral structure. This structural design can effectively improve the stability of the convex buckle 30. Even if the volume of the connecting shaft 11 is small, the structure stability of the convex buckle 30 can still be ensured. Moreover, this structural design can also ensure that when there is a space in the axial direction of the connecting shaft 11, it will not affect the use and performance of the convex buckle 30.

[0065] In this embodiment, as Figure 2 shown, the connecting cavity 21 is a through structure. A fixing plate 50 is provided below the through structure of the connecting cavity 21. The fixing part 42 of the elastic buckle 40 is arranged at the bottom of the connecting cavity 21 and is fixedly connected to the fixing plate 50. The fixing plate 50, as a centering element, can be used for the connecting of the fixing part 42 of the elastic buckle 40 and provides a supporting structure for the installation of the fixing part 42 of the elastic buckle 40. In this way, it can be ensured that the fixing part 42 of the elastic buckle 40 can always be in a fixed state (as a fixed end) after the installation is completed. The fixing plate 50 can be connected to the second connecting component 20 or fixedly connected to other exteriors (the cutter head assembly 100 or the handle assembly 200). All in all, the provided fixing plate 50 realizes the installation and fixation of the fixing part 42 of the elastic buckle 40.

[0066] Preferably, as Figure 7 shown, a plurality of connecting holes 44 are provided on the fixing part 42, and a plurality of connecting columns 51 are provided on the fixing plate 50, which respectively pass through the fixing holes to fix the fixing part 42. For example, the connecting column 51 can be in interference fit with the connecting hole 44, so that the fixing plate 50 and the fixing part 42 are fixedly connected. Another example is that the connecting column 51 can be riveted to the connecting hole 44 (the connecting column 51 is made of plastic material and is riveted to the fixing part 42 by heating and melting; the connecting part is made of metal material and is fixed to the fixing part 42 by pressing deformation), so as to fixedly connect the fixing plate 50 and the fixing plate 50. Another example is that the connecting column 51 can be a metal part fixed and abutted against the fixing part 42 by bending, so that the fixing part 42 and the fixing plate 50 can be fixedly connected.

[0067] In this embodiment, as Figure 2As shown, a sealing ring 60 is embedded in the periphery of the fixing plate 50. The sealing ring 60 can be made of plastic material or silicone material, and its main function is to seal, reducing the entry of dust and moisture into the connection cavity 21 at the edge of the fixing plate 50 or at the gap between the fixing plate 50 and the second connecting component 20, and improving the reliability and stability of the structure.

[0068] An embodiment of the present invention also provides a shaving device, which combines Figures 9 - 10 As shown, the shaving device includes a cutter head assembly 100 and a handle assembly 200. The cutter head assembly 100 is a component for realizing the operation, and the handle assembly 200 is a component for holding and providing installation of electric or power components. Further, the cutter head assembly 100 includes at least one first connecting component 10 or a second connecting component 20 in the above-mentioned connecting structure, and the handle assembly 200 includes the other first connecting component 10 or a second connecting component 20 in the above-mentioned connecting structure. The cutter head assembly 100 and the handle assembly 200 are connected or separated by the connection or separation between the first connecting component 10 and the second connecting component 20.

[0069] For the shaving device of the embodiment of the present invention, due to the use of the above-mentioned connecting structure, even if the cutter head assembly 100 and the handle assembly 200 are frequently assembled and disassembled, it is still possible to rely on the elastic member in the connecting structure to ensure that the first connecting component 10 and the second connecting component 20 are in a connected state. Furthermore, the cutter head assembly 100 and the handle assembly 200 can always maintain a stable connection state, and the entire assembly and disassembly operation is very convenient and highly practical.

[0070] In other embodiments, personal care products such as trimmers and beauty instruments can also include the above-mentioned connecting structure to ensure that the cutter head assembly 100 and the handle assembly 200 of the personal care product can be frequently assembled and disassembled without affecting the stability of the connection between the cutter head assembly 100 and the handle assembly 200.

[0071] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A coupling structure, comprising a first coupling member and a second coupling member, characterized in that: at least one of the first coupling member and the second coupling member is provided with a connecting shaft, the other of the first coupling member and the second coupling member is provided with a connecting cavity, the shape of the connecting shaft is adapted to the shape of the connecting cavity and can be connected or separated from each other; at least two buckles protruding radially are provided on the connecting shaft, and elastic buckles corresponding to the positions of the buckles are provided in the connecting cavity. When the connecting shaft is inserted into the connecting cavity, the buckles force the corresponding elastic buckles to deform until they are buckled with the elastic buckles; the elastic buckle includes an elastic part and a fixing part connected to the elastic part. The elastic part extends axially along a direction parallel to the central axis to form a cantilever shape, and a buckling position that can be reset and buckled with the buckle after being pressed and deformed by the buckle is provided on the elastic part. At least one cutting plane is provided on the connecting shaft, and at least one of the buckles is arranged on one of the cutting planes.

2. The coupling structure according to claim 1, characterized in that: a limiting plane is provided on the connecting cavity and is used for cooperating with each of the cutting planes to limit the connecting shaft from rotating around the central axis in the connecting cavity.

3. The coupling structure according to claim 2, characterized in that: the fixing part is fixedly connected to the inside of the connecting cavity.

4. The coupling structure according to claim 3, characterized in that: at least one of the limiting planes is provided with an avoidance position, and at least one of the elastic parts is located in the avoidance position.

5. The coupling structure according to claim 3, characterized in that: the fixing part is fixed to the bottom inside the connecting cavity.

6. The coupling structure according to claim 5, characterized in that: the elastic part includes a vertical section and a V-shaped section. The bottom end of the vertical section is connected to the fixing part, and the top end extends axially along a direction parallel to the central axis. The V-shaped section is connected to the top end of the vertical section, and the tip of the V-shaped section extends radially perpendicular to the central axis to form the buckling position.

7. The coupling structure according to claim 6, characterized in that: the tip of the V-shaped section is a tip with a curved surface formed by a bending process.

8. The coupling structure according to claim 6, characterized in that: a lower limiting area for accommodating the buckle is formed between the V-shaped section and the fixing part.

9. The coupling structure according to claim 6, characterized in that: an upper limiting area for accommodating the V-shaped section is provided above the buckle on the connecting shaft.

10. The coupling structure according to any one of claims 1 to 9, characterized in that: the elastic buckle is integrally formed by the elastic part and the fixing part with a metal material, and / or the buckle and the connecting shaft are integrally formed with a plastic material.

11. The coupling structure according to any one of claims 3 to 9, characterized in that: the connecting cavity is a through structure, a fixing plate is provided below the through connecting cavity, and the fixing part is arranged at the bottom of the connecting cavity and fixedly connected to the fixing plate.

12. The coupling structure according to claim 11, wherein: a plurality of connection holes are provided on the fixing portion, and a plurality of connection posts are provided on the fixing plate, each of which passes through the respective connection holes to fix the fixing portion.

13. The coupling structure according to claim 12, wherein: a sealing ring is embedded in the periphery of the fixing plate.

14. A shaving device, comprising a cutter head assembly and a handle assembly, wherein: the cutter head assembly includes at least one of the first coupling member or the second coupling member in the coupling structure according to any one of claims 1 to 13, the handle assembly includes the other of the first coupling member or the second coupling member in the coupling structure according to any one of claims 1 to 13, and the cutter head assembly and the handle assembly are connected or separated by the connection or separation between the first coupling member and the second coupling member.

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