vibration exciter

Abstract

The utility model belongs to exciter technical field discloses a kind of vibration exciters, including shell, magnetic circuit system and coil, shell includes shell main body and cover plate, shell main body is integrated structure, and including first shell part, second shell part and the cantilever structure connected between first shell part and second shell part, cantilever structure can occur elastic deformation;Cover plate is connected to second shell part;Magnetic circuit system is located in shell, and is connected to first shell part, and magnetic circuit system has magnetic gap;Coil is located in shell, and one end in coil axis direction is connected to cover plate, and the other end is inserted into magnetic gap, and magnetic circuit system can vibrate in first direction relative to coil.The vibration exciter provided by the utility model has fewer component quantities, simpler structure, fewer assembly steps, and higher assembly efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to exciter technical field especially relates to a vibration exciter. BACKGROUND

[0002] Electronic devices such as mobile phones, tablet computers, and handheld multimedia entertainment devices often use exciters to achieve system feedback, such as vibration feedback for mobile phones and game consoles.

[0003] In the prior art, electronic devices produce sound by vibrating the screen or the shell to avoid the open hole structure. The vibration source of the screen or the shell is an exciter. The exciter includes a shell, a magnetic circuit system, a coil, and an elastic member, all of which are arranged in the shell. The coil is connected to the shell and wound around the outer periphery of the magnetic circuit system. The coil generates a magnetic field when energized. The magnetic circuit system converts electrical energy into mechanical energy using electromagnetic induction. The magnetic circuit system is suspended in the shell by the elastic member. When the magnetic circuit system vibrates, it can drive the shell to vibrate, achieving vibration feedback. As can be seen, the exciter in the prior art requires a separate elastic member, resulting in a large number of components, a complex structure, and a large number of assembly steps, which reduces assembly efficiency. SUMMARY

[0004] The utility model aims to provide a kind of vibration exciter, to solve the problems of multiple components, complex structure, multiple assembly steps and low assembly efficiency of vibration exciter in the prior art.

[0005] Based on the above concept, the technical solution adopted by the utility model is as follows:

[0006] The vibration exciter comprises:

[0007] The shell comprises a shell body and a cover plate. The shell body is of an integrated structure and comprises a first shell part, a second shell part and a cantilever structure connected between the first shell part and the second shell part. The cantilever structure can be elastically deformed. The cover plate is connected to the second shell part.

[0008] The magnetic circuit system is connected to the first shell part and suspended in the shell through the cantilever structure. The magnetic circuit system has a magnetic gap.

[0009] The coil is arranged in the shell. One end of the coil in the axial direction is connected to the cover plate, and the other end extends into the magnetic gap. The magnetic circuit system can vibrate relative to the coil.

[0010] In one of the embodiments, the vibration exciter further comprises a stopper connected to the cover plate and / or the second shell part; the stopper is spaced apart from the magnetic circuit system and is used to limit the magnetic circuit system from contacting the coil in a characteristic direction; the characteristic direction is perpendicular to the thickness direction of the shell.

[0011] In one of the embodiments, the magnetic circuit system comprises a yoke and a magnet;

[0012] The yoke comprises a main body part and a plurality of extension parts connected to the main body part at an angle; the plurality of extension parts are spaced apart along the circumferential direction of the main body part; the main body part is connected to the first shell part; the magnet is connected to the main body part and cooperates with the extension parts to form the magnetic gap; the stopper is arranged on the side of the extension part away from the magnet and is used to limit the extension part from contacting the coil in the characteristic direction.

[0013] In one of the embodiments, the plurality of extension parts comprises two extension parts arranged opposite in a second direction and two extension parts arranged opposite in a third direction;

[0014] The stopper is annular; the plurality of extension parts are located within the ring of the stopper; the inner annular surface of the stopper can contact the extension parts to limit the upper limit of the distance between the extension parts and the coil; the notch is used for the lead-through of the lead wire of the coil.

[0015] In one of the embodiments, the plurality of extension parts comprises two first extension parts arranged opposite in a second direction and two second extension parts arranged opposite in a third direction; the stopper is provided in plurality; at least one stopper is arranged on each of the two opposite sides of the two first extension parts; at least one stopper is arranged on each of the two opposite sides of the two second extension parts.

[0016] In one of the embodiments, the cantilever structure comprises a plurality of first deformation parts; the plurality of first deformation parts are spaced apart along the circumferential direction of the first shell part; one end of the first deformation part is connected to the first shell part and the other end of the first deformation part is connected to the second shell part; the first deformation part can be elastically deformed.

[0017] In one of the embodiments, the connection position of the first deformation part to the first shell part is a first connection position; the connection position of the first deformation part to the second shell part is a second connection position; the first connection position and the second connection position are arranged staggered in the characteristic direction.

[0018] The yoke further comprises a deformation structure; the deformation structure can be elastically deformed; the extension part is connected to the shell through the deformation structure.

[0019] In one of the embodiments, the deformed structure is integrated with the extension; or the deformed structure is connected to the surface of the coil away from the extension.

[0020] In one of the embodiments, the vibration exciter further comprises a buffer layer, and the magnetic circuit system is provided with the buffer layer between the magnetic circuit system and the cover plate.

[0021] The buffer layer is connected to the magnetic circuit system and / or the cover plate.

[0022] The utility model discloses beneficial effect:

[0023] The utility model provides a vibration exciter, the shell includes shell main body and cover plate, and the shell main body includes integrally formed first shell part, second shell part and cantilever structure, and the magnetic circuit system is connected in the first shell part, so that the shell main body can realize the elastic movement of the magnetic circuit system and the cover plate and second shell part, need not set up separate spring in the shell, equivalent to the component of elastic deformation and support magnetic circuit system is integrated in one, and then on the basis of not influencing the normal function of vibration exciter, the component quantity of vibration exciter is reduced, and then the structure complexity degree of vibration exciter is reduced, makes the structure of vibration exciter be relatively simple, when assembling vibration exciter, the assembly step can be less, and the assembly efficiency of vibration exciter is improved.

[0024] And, because the component quantity of vibration exciter of vibration is less, can reduce the weight of vibration exciter, be favorable to the light weight of vibration exciter.

[0025] In addition, the vibration exciter provided by the utility model improves the structure of the shell main body, does not need to additionally set a spring, and reduces the cost of the vibration exciter. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment of the utility model will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the content of the embodiment of the utility model and the drawings without creating labor.

[0027] Figure 1 It is the first structure schematic view of the vibration exciter provided by the embodiment one of the utility model;

[0028] Figure 2 It is the second structure schematic view of the vibration exciter provided by the embodiment one of the utility model;

[0029] Figure 3is the exploded schematic view of the vibration exciter provided by the embodiment one of the utility model;

[0030] Figure 4 is the sectional view of the vibration exciter provided by the embodiment one of the utility model;

[0031] Figure 5 is the exploded view of the shell main body and the magnetic yoke provided by the embodiment one of the utility model;

[0032] Figure 6 is the exploded schematic view of the vibration exciter provided by the embodiment three of the utility model;

[0033] Figure 7 is the sectional view of the vibration exciter provided by the embodiment three of the utility model;

[0034] Figure 8 is the structural schematic view of the magnetic yoke provided by the embodiment three of the utility model;

[0035] Figure 9 is the exploded schematic view of the vibration exciter provided by the embodiment four of the utility model;

[0036] Figure 10 is the sectional view of the vibration exciter provided by the embodiment four of the utility model;

[0037] Figure 11 is the structural schematic view of the magnetic yoke provided by the embodiment four of the utility model;

[0038] Figure 12 is the exploded schematic view of the vibration exciter provided by the embodiment five of the utility model;

[0039] Figure 13 is the sectional view of the vibration exciter provided by the embodiment five of the utility model.

[0040] In the drawing:

[0041] 100, shell; 110, shell main body; 111, first shell part; 112, second shell part; 113, cantilever structure; 1131, first deformation piece; 11311, deformation part; 120, cover plate; 130, hollow hole; 140, through hole; 200, magnetic yoke; 210, main body part; 211, protrusion; 220, extension part; 2201, first extension part; 2202, second extension part; 230, deformation structure; 231, annular part; 232, second deformation piece; 2321, energy absorbing part; 233, inner ring part; 234, matching part; 300, magnet; 400, coil; 500, stop piece; 510, notch; 600, buffer layer; 700, magnetic conducting piece; 10, magnetic gap; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0042] In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the utility model will be further explained below in combination with the drawings and through specific embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, but not limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the parts related to the utility model are shown in the drawings, not all.

[0043] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0044] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrated; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0045] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature. In the description of the embodiment, if not specially stated, "a plurality of" specifically refers to two or more than two.

[0046] In the description of the present embodiment, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and other orientation or position relationships are based on the orientation or position relationships shown in the drawings, which are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0047] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a mediating element.

[0048] The technical solutions of the present utility model will be further described below in conjunction with the drawings and through specific embodiments.

[0049] Embodiment one

[0050] The vibration exciter provided in the present embodiment has a small number of components, a simple structure, fewer assembly steps, and high assembly efficiency.

[0051] The vibration exciter in the present embodiment can be applied in electronic devices such as mobile phones, tablet computers, and handheld multimedia entertainment devices, and is used to generate vibration feedback.

[0052] As shown in Figures 1 to 5 The vibration exciter includes a shell 100 and a magnetic circuit system (not labeled in the figure), a coil 400, and a stop piece 500, all of which are disposed in the shell 100. The shell 100 has an inner cavity, and the magnetic circuit system, the coil 400, and the stop piece 500 are all disposed in the inner cavity. The material of the shell 100 in the present embodiment can be metal or non-metal, which is not limited in the present embodiment. The shape of the shell 100 in the present embodiment can be determined according to actual application. For example, the shell 100 can be square, cylindrical, or frustoconical. The present embodiment provides a shell 100 with a square cross section in the drawings. For ease of understanding, the thickness direction of the shell 100 is referred to as the first direction X, the length direction of the shell 100 is referred to as the second direction Y, and the width direction of the shell 100 is referred to as the third direction Z, that is, any two of the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0053] Exemplarily, the shell 100 in the present embodiment is of a split structure, specifically, Figure 2As shown, the shell 100 includes a shell body 110 and a cover plate 120. Among them, the shell body 110 is a one-piece structure, which can be obtained in one machining process. And the shell body 110 includes a first shell part 111, a second shell part 112 and a cantilever structure 113 connected between the first shell part 111 and the second shell part 112, the cantilever structure 113 can be elastically deformed, so that the relative position of the first shell part 111 and the second shell part 112 is variable, thereby providing conditions for the vibration of the magnetic circuit system. It should be noted that the cantilever structure 113 in the embodiment can be elastically deformed in the first direction X, and can also be elastically deformed in the second direction Y, and can also be elastically deformed in the third direction Z, which is not limited in the embodiment.

[0054] As shown in Figure 3 and Figure 4 The magnetic circuit system is connected to the first shell part 111 and suspended in the shell through the cantilever structure 113, so that when the magnetic circuit system vibrates, the cantilever structure 113 elastically deforms to ensure the normal work of the vibration exciter. And the magnetic circuit system has a magnetic gap 10. In the embodiment, one end of the coil 400 is connected to the cover plate 120, and the other end extends into the magnetic gap 10. The coil 400 can be electromagnetically inducted with the magnetic circuit system after being energized, and the magnetic circuit system can vibrate relative to the coil 400 under the action of electromagnetic induction, specifically in the first direction X relative to the coil 400, thereby driving the shell 100 to vibrate in the first direction X. The shell 100 is connected to the parts of the shell, screen and the like of the electronic device that can vibrate to realize the vibration feedback of the electronic device.

[0055] The vibration exciter provided by the embodiment, the shell 100 includes a shell body 110 and a cover plate 120, the shell body 110 includes a one-piece first shell part 111, a second shell part 112 and a cantilever structure 113, the magnetic circuit system is connected to the first shell part 111, so that the shell body 110 can realize the elastic movement of the magnetic circuit system, the cover plate 120 and the second shell part 112, without the need to set a separate spring in the shell 100, which is equivalent to integrating the components for elastic deformation and supporting the magnetic circuit system, thereby reducing the number of components of the vibration exciter without affecting the normal function of the vibration exciter, thereby reducing the structural complexity of the vibration exciter, making the structure of the vibration exciter relatively simple, and the assembly steps can be less when assembling the vibration exciter, thereby improving the assembly efficiency of the vibration exciter.

[0056] And, since the number of components of the vibration exciter of the embodiment is less, the weight of the vibration exciter can be reduced, which is beneficial to the lightweight of the vibration exciter.

[0057] In addition, the vibration exciter provided by the embodiment improves the structure of the shell body 110 without the need for additional springs, thereby reducing the cost of the vibration exciter.

[0058] In the embodiment, the vibration exciter further comprises a stopper 500 connected to the cover plate 120 and / or the second shell portion 112, that is, the stopper 500 is not directly connected to the cantilever structure 113 or the first shell portion 111. The stopper 500 is spaced apart from the magnetic circuit system in a direction perpendicular to the first direction X and is used to limit the magnetic circuit system from contacting the coil 400 in a characteristic direction, thereby avoiding the coil 400 from being hit and reducing the risk of displacement of the coil 400, thereby reducing the risk of separation of the coil 400 from the shell 100, and having higher reliability. The characteristic direction is perpendicular to the thickness direction of the shell 100 (i.e., the first direction X), that is, the characteristic direction can be the second direction Y, or the third direction Z, or both the second direction Y and the third direction Z, which is determined according to the actual installation position of the magnetic circuit system.

[0059] In some optional embodiments, the magnetic circuit system comprises a magnetic yoke 200 and a magnet 300. As shown in the Figure 3 , the magnetic yoke 200 comprises a main body portion 210 and a plurality of extension portions 220 connected to the main body portion 210 at an angle. As shown in the Figure 4 , the angle between the main body portion 210 and the extension portion 220 can be equal to 90 degrees, that is, the main body portion 210 and the extension portion 220 are connected perpendicularly. In other optional embodiments, the angle between the main body portion 210 and the extension portion 220 can be greater than or less than 90 degrees, which is not limited in the embodiment. The extension portion 220 in the embodiment is connected to the edge of the main body portion 210, and the plurality of extension portions 220 are spaced apart along the circumference of the main body portion 210.

[0060] As shown in the Figure 4 , the main body portion 210 is connected to the first shell portion 111 to achieve the connection between the magnetic yoke 200 and the shell 100. The magnet 300 in the embodiment is connected to the main body portion 210, so that the magnet 300 can be connected to the first shell portion 111 through the magnetic yoke 200. In the characteristic direction, the magnet 300 is spaced apart from and opposite to the extension portion 220 to form a magnetic gap 10 with the extension portion 220. As shown in the

[0061] In one embodiment, the stopper 500 is arranged on the side of the extension portion 220 away from the magnet 300 and is used to limit the extension portion 220 from contacting the coil 400 in the characteristic direction. In this way, when the extension portion 220 moves relative to the coil 400 in a direction perpendicular to the first direction X, the extension portion 220 will not touch the coil 400.

[0062] In other embodiments, the stopper 500 can also be arranged on the side of the extension 220 facing the magnet 300, and used to limit the extension 220 from contacting the coil 400, which is not limited in the embodiments.

[0063] It should be noted that the stopper 500 is arranged at a position cooperating with the extension 220, so as to prevent the extension 220 from contacting the coil 400.

[0064] For example, as shown in Figure 3 , the plurality of extensions 220 includes two extensions 220 arranged opposite in the second direction Y and two extensions 220 arranged opposite in the third direction Z. The stopper 500 is annular, and the plurality of extensions 220 are all located within the annulus of the stopper 500, that is, the stopper 500 is arranged outside the plurality of extensions 220. The inner annular surface of the stopper 500 can contact the extension 220, and when the stopper 500 contacts one of the extensions 220 in the second direction Y, it can limit the other extension 220 in the second direction Y from colliding with the coil 400, and when the stopper 500 contacts one of the extensions 220 in the third direction Z, it can limit the other extension 220 in the third direction Z from colliding with the coil 400, thereby limiting the movement of the extension 220 in the second direction Y and the third direction Z, and further limiting the upper limit of the distance between the extension 220 and the magnetic circuit system, avoiding the extension 220 from colliding with the coil 400, and having high reliability.

[0065] It should be noted that in order to avoid the lead of the coil 400, in the embodiments, as shown in Figure 5 , the stopper 500 has a notch 510 for the lead of the coil 400 to pass through. Of course, it can be understood that the stopper 500 can also not have the notch 510, but have a shallow groove, which is not limited in the embodiments.

[0066] The structure of the stopper 500 can be various, and the embodiments provide two structures of the stopper 500.

[0067] In one structure of the stopper 500, the stopper 500 is in the form of a sheet, and the large surface of the stopper 500 is perpendicular to the first direction X, that is, the stopper 500 is arranged perpendicular to the extension 220. In this way, the inner side of the stopper 500 is used to abut against the extension 220, and the outer side of the stopper 500 is used to connect the second housing 112 or the cover plate 120. In some optional embodiments, as shown in Figure 4 , the outer side of the stopper 500 is clamped between the second housing 100 and the cover plate 120.

[0068] In another structure of the stopper 500, the stopper 500 is in a columnar shape, and the axis direction of the stopper 500 is the first direction X, that is, the axis direction of the stopper 500 is the same as the extending direction of the extending part 220. One end of the stopper 500 in the axis direction is connected to the cover plate 120, and the other end is used to abut against the extending part 220.

[0069] The stopper 500 with the above two structures can limit the extending part 220 and prevent the extending part 220 from touching the coil 400.

[0070] The specific structure of the cantilever structure 113 can be various, and the embodiment provides a cantilever structure 113. As shown in Figure 5 The cantilever structure 113 includes a plurality of first deformation parts 1131. The plurality of first deformation parts 1131 are arranged at intervals in the circumferential direction of the first shell part 111, one end of the first deformation part 1131 is connected to the first shell part 111, the other end of the first deformation part 1131 is connected to the second shell part 112, and the first deformation part 1131 can be elastically deformed. By arranging the plurality of first deformation parts 1131, on the one hand, the connection strength and connection reliability of the first shell part 111 and the second shell part 112 can be ensured, and on the other hand, the deformation ability of the cantilever structure 113 can be improved, thereby increasing the movement range of the first shell part 111 relative to the second shell part 112 and improving the vibration amplitude of the magnetic circuit system.

[0071] It should be noted that the first deformation part 1131 can be elastically deformed in the first direction X, and can also be elastically deformed in the second direction Y or the third direction Z, so as to be able to buffer forces from different directions and have higher buffering capacity. The plurality of first deformation parts 1131 in the embodiment are arranged in the same layer as the first shell 100, the top surface (or the bottom surface) of the plurality of first deformation parts 1131 is coplanar with the top surface (or the bottom surface) of the first shell 100, so that the space occupied by the shell 100 in the first direction X is smaller on the basis of ensuring the buffering performance, which is beneficial to the thinning of the vibration exciter.

[0072] As shown in Figure 5 In the circumferential direction of the first shell part 111, two adjacent deformation parts 11311 and the first shell part 111 and the second shell part 112 form a through hole 140 therebetween, and the through hole 140 provides a movement space for the first deformation part 1131, so as to ensure the buffering performance and suction performance of the cantilever structure 113.

[0073] The specific structure of the first deformation part 1131 can be various, and the embodiment provides a first deformation part 1131. As shown in Figure 5As shown, the first deformable member 1131 includes at least two deformable portions 11311 connected end-to-end, with the two connected deformable portions 11311 arranged at an obtuse angle. Thus, by providing multiple deformable portions 11311, the length of the first deformable member 1131 can be relatively long, resulting in a larger deformation amplitude in the first direction X, further improving the buffering performance of the cantilever structure 113 and thereby enhancing the impact resistance of the vibration exciter. Furthermore, the obtuse angle arrangement of the two connected deformable portions 11311 ensures that the size of the first deformable member 1131 in the direction perpendicular to the first direction X (e.g., the second direction Y or the third direction Z) is not excessive, allowing for a smaller length and width of the vibration exciter, which is beneficial for miniaturization.

[0074] To further increase the number of first deformable members 1131 between the first shell portion 111 and the second shell portion 112, in one possible embodiment, the connection position between the first deformable member 1131 and the first shell portion 111 is designated as the first connection position, and the connection position between the first deformable member 1131 and the second shell portion 112 is designated as the second connection position. The first connection position and the second connection position are staggered in the characteristic direction, that is, the first connection position and the second connection position corresponding to one first deformable member 1131 are not opposite each other in the second direction Y or the third direction Z. In this way, while ensuring that the length of the first deformable member 1131 is relatively long, multiple first deformable members 1131 can be fitted together, so that multiple first deformable members 1131 can be provided in a small space, and the arrangement of multiple first deformable members 1131 can be relatively regular.

[0075] Optionally, the cover plate 120 can be made of non-ferromagnetic stainless steel, copper, or other non-magnetic alloys. The shell body 110 can be made of stainless steel such as SUS304 or SUS430F, so that the shell body 110 has both strength and elastic cushioning functions. The shell body 110 may or may not be magnetic, and this embodiment does not limit this.

[0076] In some alternative embodiments, to further reduce the weight of the vibration actuator, such as... Figure 5 As shown, the first shell portion 111 of the shell body 110 has a perforated hole 130, and the surface of the main body portion 210 of the magnetic yoke 200 facing away from the extension portion 220 has a protrusion 211 that extends into the perforated hole 130. The perforated hole 130 reduces the weight of the first shell portion 111, improving the lightweight design of the vibration exciter. The protrusion 211 extending into the perforated hole 130 facilitates the alignment and installation of the magnetic yoke 200 and the first shell portion 111, reducing the assembly difficulty of the magnetic yoke 200 and the first shell 100.

[0077] To further improve the impact resistance of the vibration exciter, such as Figure 3 and Figure 4As shown, the vibration exciter further comprises a buffer layer 600, which has the function of energy-absorbing buffering.

[0078] Exemplarily, the buffer layer 600 is arranged between the magnetic circuit system and the cover plate 120, so that the buffer layer 600 can buffer the impact between the magnetic circuit system and the cover plate 120, avoid the magnetic circuit system directly impacting on the cover plate 120, reduce the risk of damage of the magnetic circuit system, and also avoid the cover plate 120 being impacted out of the pit, affecting the appearance of the vibration exciter.

[0079] Optionally, the buffer layer 600 can be made of elastic material, and exemplarily, the buffer layer 600 can include one or more layers. For example, the buffer layer 600 includes a buffer material layer and an anti-sticking layer, wherein the buffer material layer can be made of PSA (pressure sensitive double-sided adhesive), and the anti-sticking layer can be made of PET (thermoplastic polyester). The buffer material layer mainly plays a buffering role, and the anti-sticking layer is used for anti-sticking of the buffer layer 600.

[0080] In one embodiment, as shown in Figure 4 The buffer layer 600 is connected to the inner wall of the cover plate 120 and is arranged in a spaced manner with the magnetic circuit system. In this way, the buffer layer 600 can not only avoid the magnetic circuit system directly impacting on the cover plate 120, but also will not increase the weight of the magnetic circuit system.

[0081] In other embodiments, the buffer layer 600 is connected to the magnetic circuit system and is arranged in a spaced manner with the cover plate 120, so as to also achieve the purpose of avoiding the magnetic circuit system directly impacting on the cover plate 120.

[0082] In some optional embodiments, as shown in Figure 3 The magnetic circuit system further comprises a magnetic conducting piece 700, which is arranged on the side of the magnet 300 away from the yoke 200, and the buffer layer 600 is arranged between the magnetic conducting piece 700 and the cover plate 120.

[0083] It should be noted that the buffer layer 600 can also be arranged between the extension part 220 and the cover plate 120 to prevent the extension part 220 from directly colliding with the cover plate 120.

[0084] The vibration exciter provided in the embodiment has the advantages that the first shell part 111, the second shell part 112 and the cantilever structure 113 are integrated, the overall structural strength is stronger than that of a split structure, and the integrated elastic structure reduces other components, simplifies the assembly process of the vibration exciter, reduces material cost, improves product yield, and greatly reduces the price cost of the whole product. The inner side of the cover plate 120 in the embodiment is attached with the buffer layer 600, so that the safety of falling and impact is greatly improved.

[0085] Embodiment Two

[0086] The embodiment provides a vibration exciter, which is different from the vibration exciter in the first embodiment in the structure of the stopper 500.

[0087] Specifically, as shown in the figure, Figure 3 The plurality of extension parts 220 in the embodiment include two first extension parts 2201 oppositely arranged in the second direction Y and two second extension parts 2202 oppositely arranged in the third direction Z. The stopper 500 is arranged on the two opposite sides of the two first extension parts 2201 and the two opposite sides of the two second extension parts 2202. In an embodiment, the stopper 500 is split, and the plurality of stoppers 500 include two first stoppers (not shown in the figure) and two second stoppers (not shown in the figure). The two first stoppers are arranged on the opposite sides of the two first extension parts 2201 and correspond to the two first extension parts 2201 oppositely in the second direction Y, and the two second stoppers are arranged on the opposite sides of the two second extension parts 2202 and correspond to the two second extension parts 2202 oppositely in the third direction Z.

[0088] When one of the first stoppers contacts the corresponding first extension part 2201 in the second direction Y, the other first extension part 2201 in the second direction Y is prevented from colliding with the coil 400, and when one of the second stoppers contacts the corresponding second extension part 2202 in the third direction Z, the other extension part 220 in the third direction Z is prevented from colliding with the coil 400, so that the movement of the extension part 220 in the second direction Y and the third direction Z is limited, the upper limit of the distance between the extension part 220 and the magnetic circuit system is limited, the extension part 220 is prevented from colliding with the coil 400, and the reliability is high.

[0089] The other structures in the embodiment are similar to the corresponding structures in the first embodiment and have similar beneficial effects, which will not be described here.

[0090] Embodiment three

[0091] The embodiment provides a vibration exciter, which is different from the vibration exciter in the first embodiment and the second embodiment in the specific structure of the magnetic yoke 200.

[0092] In the embodiment, as shown in the figure, Figures 6 to 8 The plurality of extension parts 220 of the magnetic yoke 200 are sequentially connected to form a whole in the shape of a ring. As shown in the figure, Figures 6 to 8As shown, the magnetic yoke 200 further comprises a deformation structure 230, the extension 220 is connected to the shell 100 through the deformation structure 230. In the embodiment, the deformation structure 230 can be connected to at least one of the first shell part 111 and the second shell part 112, and the embodiment is not limited in this regard.

[0093] Optionally, the deformation structure 230 can have various specific structures, and the embodiment provides two kinds of deformation structures 230 as follows.

[0094] In one implementation of the deformation structure 230, as shown in Figure 8 The deformation structure 230 comprises an annular part 231 and a plurality of second deformation members 232. The plurality of second deformation members 232 are arranged in a circumferential direction of the main body part 210, one end of each second deformation member 232 is connected to the extension 220, the other end of each second deformation member 232 is connected to the annular part 231, and the second deformation member 232 can elastically deform. The annular part 231 is connected to the shell 100.

[0095] It should be noted that the second deformation member 232 can elastically deform in the first direction X, and can also elastically deform in a direction perpendicular to the first direction X (i.e., the second direction Y and the third direction Z), so as to be able to buffer forces from different directions, and have a higher buffering capacity. The plurality of second deformation members 232 in the embodiment are arranged in the same layer as the annular part 231, so that the space occupied by the magnetic yoke 200 in the first direction X is smaller on the basis of ensuring the buffering performance, which is beneficial to the thinning of the vibration exciter.

[0096] For example, two second deformation members 232 adjacent in the circumferential direction of the main body part 210 form a hole structure with the extension 220 and the annular part 231, which provides a moving space for the second deformation member 232, so as to ensure the buffering performance and suction performance of the deformation structure 230.

[0097] The specific structure of the second deformation member 232 can have various structures, and the embodiment provides a second deformation member 232. As shown in Figure 8 The second deformation member 232 comprises at least two energy-absorbing parts 2321 connected end to end, and the two connected energy-absorbing parts 2321 are arranged at an obtuse angle. In this way, by arranging a plurality of energy-absorbing parts 2321, the length of the second deformation member 232 can be longer, so that the second deformation member 232 has a larger deformation amplitude in the first direction X, further improving the buffering performance of the deformation structure 230, thereby improving the anti-collision ability of the vibration exciter. Moreover, the two connected energy-absorbing parts 2321 are arranged at an obtuse angle, so that the size of the second deformation member 232 in the direction perpendicular to the first direction X is not too large, so that the length and width of the vibration exciter can be smaller, which is beneficial to the miniaturization of the vibration exciter.

[0098] To further increase the number of second deformation pieces 232 between the extension 220 and the annular portion 231, optionally, the connecting position between the second deformation piece 232 and the extension 220 is a third connecting position, the connecting position between the second deformation piece 232 and the annular portion 231 is a fourth connecting position, and the third connecting position and the fourth connecting position are arranged in a direction perpendicular to the first direction X, that is, the third connecting position and the fourth connecting position corresponding to one second deformation piece 232 are not arranged opposite to each other in the second direction Y and the third direction Z. In this way, while ensuring that the length of the second deformation piece 232 is relatively long, the plurality of second deformation pieces 232 can be matched in concave-convex, so that a plurality of second deformation pieces 232 can be arranged in a small space, and the arrangement of the plurality of second deformation pieces 232 can be more regular.

[0099] In another embodiment of the deformation structure 230, the deformation structure 230 can not be provided with the annular portion 231, and specifically, the deformation structure 230 includes a plurality of connecting pieces (not shown in the figure). The plurality of connecting pieces are arranged at intervals along the circumference of the main body portion 210, one end of each connecting piece is connected to the extension 220, the other end of each connecting piece is connected to the shell 100, and the connecting piece can be elastically deformed. In this way, the elastic deformation of the connecting piece can achieve the buffering performance and the suction performance of the deformation structure 230. It should be noted that the shape of the connecting piece can be similar to that of the second deformation piece 232, for example, the connecting piece includes at least two connecting portions connected end to end, and the two connecting portions connected are arranged at an obtuse angle, so that the connecting piece can be relatively long.

[0100] It should be noted that, as shown in Figure 7 The deformation structure 230 and the cantilever structure 113 are arranged opposite to each other in the first direction X, so that the vibration exciter is a double-layer elastic structure. In this way, the rotational rigidity of the vibration exciter can be increased, so as to suppress the swing problem of the vibration exciter, and thus the magnetic gap 10 of the magnetic circuit system can be reduced, and the reliability and vibration performance of the vibration exciter can be improved.

[0101] To further reduce the number of components of the vibration exciter, in an embodiment, the deformation structure 230 and the extension 220 are an integral structure. In this way, the number of components can be reduced, the assembly process of the vibration exciter is simplified, so as to reduce the material cost, improve the product yield, and greatly reduce the cost of the entire vibration exciter.

[0102] It should be noted that the second deformation piece 232 and the stopper 500 can be arranged opposite to each other in the first direction X and do not interfere with each other. For example, the second deformation piece 232 can be closer to the cover plate 120 than the stopper 500. The second deformation piece 232 can also be clamped between the cover plate 120 and the second shell portion 112, and the present embodiment does not limit this.

[0103] When the second deformation part 232 is arranged on the side of the stopper 500 facing the cover plate 120, a buffer layer 600 can be arranged between the deformation structure 230 and the cover plate 120 to prevent the deformation structure 230 from directly colliding with the cover plate 120.

[0104] The other structures of this embodiment are similar to the corresponding structures in Embodiment One or Embodiment Two and have similar beneficial effects. This embodiment will not be described again here.

[0105] Embodiment Four

[0106] This embodiment provides a vibration exciter, which differs from Embodiment Three in that the deformation structure 230 and the extension part 220 are not a one-piece structure but a split structure.

[0107] Specifically, as shown in Figures 9 to 11 , the surface of the deformation structure 230 and the extension part 220 faces away from the coil 400. In this way, the extension part 220 can also be connected to the shell 100.

[0108] In some optional embodiments, on the basis of Embodiment Three, the deformation structure 230 not only includes the annular part 231 and the energy-absorbing part 2321, but also includes an inner annular part 233 in the shape of a ring and a matching part 234 connected to the inner annular part 233, as shown in Figure 11 . The inner annular part 233 is arranged in the same layer as the annular part 231, and the second deformation part 232 is connected between the inner annular part 233 and the annular part 231. The matching part 234 extends along the first direction X and is connected to the inner annular part 233. The matching part 234 is arranged in close contact with the extension part 220 and is connected to the extension part 220 to have a larger connection area and improve the connection reliability.

[0109] In this embodiment, the material of the matching part 234 is a magnetic material, for example, low-carbon steel SPCC, cold-rolled steel SPCG, etc. In this way, there are more magnetic components in the magnetic circuit system, which can improve the magnetic induction intensity of the vibration exciter. At this time, the material of the deformation structure 230 can be 304 stainless steel.

[0110] The other structures of this embodiment are similar to the corresponding structures in Embodiment Three and have similar beneficial effects. This embodiment will not be described again here.

[0111] Embodiment Five

[0112] This embodiment provides a vibration exciter, which differs from Embodiments One, Two, Three, and Four in that the connection relationship of the buffer layer 600 is different.

[0113] Specifically, as shown in Figure 12 and Figure 13As shown, the buffer layer 600 in the embodiment is in contact with the magnetic circuit system and the cover plate 120. The buffer layer 600 in the embodiment has elasticity, and the buffer layer 600 is in contact with the inner wall of the cover plate 120 and the magnetic conducting member 700 of the magnetic circuit system. By arranging the buffer layer 600 with elasticity, the buffer layer 600 does not interfere with the movement of the magnetic circuit system in the first direction X, and the generation and transmission of vibration are ensured.

[0114] The other structures in the embodiment are similar to the corresponding structures in the embodiments one, two, three and four, and have similar beneficial effects, which will not be described here.

[0115] It should be noted that the above are only the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A vibration exciter, characterised in that, The application relates to a vibration exciter. The vibration exciter comprises a shell (100) and a magnetic circuit system. The shell (100) comprises a shell body (110) and a cover plate (120). The shell body (110) is a one-piece structure and comprises a first shell part (111), a second shell part (112) and a cantilever structure (113) connected between the first shell part (111) and the second shell part (112).

2. The vibration exciter of claim 1, wherein The cantilever structure (113) can be elastically deformed.

3. The vibration exciter of claim 2, wherein The cover plate (120) is connected to the second shell part (112). The magnetic circuit system is connected to the first shell part (111) and is suspended in the shell (100) through the cantilever structure (113).

4. The vibration exciter of claim 3, wherein The magnetic circuit system has a magnetic gap (10). A coil (400) is arranged in the shell (100). One end of the coil (400) in the axial direction is connected to the cover plate (120), and the other end extends into the magnetic gap (10). The magnetic circuit system can vibrate relative to the coil (400). The vibration exciter further comprises a stopper (500) connected to the cover plate (120) and / or the second shell part (112). The stopper (500) is spaced apart from the magnetic circuit system and is used to limit the magnetic circuit system from contacting the coil (400) in a characteristic direction. The characteristic direction is perpendicular to the thickness direction of the shell (100). The magnetic circuit system comprises a magnetic yoke (200) and a magnet (300). The magnetic yoke (200) comprises a main body part (210) and a plurality of extension parts (220) connected to the main body part (210) at an angle. The plurality of extension parts (220) are spaced apart along the circumference of the main body part (210). The main body part (210) is connected to the first shell part (111). The magnet (300) is connected to the main body part (210) and cooperates with the extension parts (220) to form the magnetic gap (10). The stopper (500) is arranged on the side of the extension parts (220) away from the magnet (300) and is used to limit the extension parts (220) from contacting the coil (400) in the characteristic direction. The plurality of extension parts (220) comprise two extension parts (220) arranged opposite to each other in a second direction (Y) and two extension parts (220) arranged opposite to each other in a third direction (Z). The stopper (500) is annular. The plurality of extension parts (220) are located in the ring of the stopper (500). The inner annular surface of the stopper (500) can contact the extension parts (220) to limit the upper limit of the distance between the extension parts (220) and the coil (400).

5. The vibration exciter of claim 3, wherein The plurality of extension portions (220) include two first extension portions (2201) oppositely arranged in the second direction (Y) and two second extension portions (2202) oppositely arranged in the third direction (Z); the stopper (500) is provided in plurality, and at least one stopper (500) is arranged on each of the two opposite sides of the two first extension portions (2201), and at least one stopper (500) is arranged on each of the two opposite sides of the two second extension portions (2202).

6. The vibration exciter of claim 1, wherein The cantilever structure (113) comprises a plurality of first deformation members (1131), and the plurality of first deformation members (1131) are arranged at intervals in the circumferential direction of the first shell portion (111). One end of the first deformation member (1131) is connected to the first shell portion (111), and the other end of the first deformation member (1131) is connected to the second shell portion (112). The first deformation member (1131) can be elastically deformed.

7. The vibration exciter of claim 6, wherein The first deformation member (1131) and the first shell portion (111) are connected at a first connection position, and the first deformation member (1131) and the second shell portion (112) are connected at a second connection position. The first connection position and the second connection position are arranged in a staggered manner in the characteristic direction.

8. The vibration exciter of claim 3, wherein The magnetic yoke (200) further comprises a deformation structure (230), and the extension portion (220) is connected to the shell (100) through the deformation structure (230).

9. The vibration exciter of claim 8, wherein The deformation structure (230) and the extension portion (220) are in an integrated structure, or the deformation structure (230) and the surface of the extension portion (220) away from the coil (400) are connected.

10. The vibration exciter of claim 1, wherein The vibration exciter further comprises a buffer layer (600), and the magnetic circuit system and the cover plate (120) are provided with the buffer layer (600). The buffer layer (600) is connected to the magnetic circuit system and / or the cover plate (120).

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