A slender linear high-frequency oscillator and electric toothbrush

Abstract

The utility model discloses a slender linear high-frequency oscillator and an electric toothbrush, wherein the linear high-frequency oscillator comprises a housing with an installation cavity formed by axially penetrating therein; a leaf spring assembly is provided at an opening at one end of the housing, and a coil winding module is provided at an opening at the other end, the coil winding module comprises an iron core, the iron core comprises a horizontal portion axially arranged in the installation cavity, the horizontal portion extends to the outside of the installation cavity at one end away from the leaf spring assembly, and is turned over to form a connecting portion; an insulating skeleton is sleeved on the portion of the iron core extending outside the installation cavity, one end of the insulating skeleton abuts against the end face of the housing away from the leaf spring assembly, and a coil is wound on the insulating skeleton; a mover module is axially slidably connected in the installation cavity, one end of the mover module is connected to the leaf spring assembly; the mover module at least partially overlaps with the horizontal portion, and a magnetic steel is provided on the end face facing the horizontal portion. The utility model effectively reduces the overall volume of the linear high-frequency oscillator so that it can be applied to products with smaller volumes.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an elongated linear high-frequency oscillator and an electric toothbrush. Background Art

[0002] An oscillator is a transmission device that converts electrical energy directly into linear motion mechanical energy without any intermediate conversion mechanism. An oscillator that obtains strong oscillations during high-frequency linear motion is called a linear oscillator (also called a linear motor or linear motor). Linear oscillators are widely used in health care products, cleaning products, massage products, electronic household appliances, etc.

[0003] Specifically, the linear oscillator is caused by the interaction between the permanent magnet and the electromagnet after power is applied. When the direction of the current changes, the magnetic poles of the electromagnet will also switch between the N pole and the S pole at any time. The changes in this interaction, when this high-frequency change occurs, will cause the motor to move back and forth left and right, thereby generating high-frequency oscillations.

[0004] The vibration structure of most existing linear oscillators usually includes a coil winding module (including an electromagnet) and a mover module (including a permanent magnet) in the same cross-section perpendicular to the axial direction, that is, the coil winding module is located directly above or below the mover module. As a result, after the casing wraps the periphery, the radial diameter of the overall oscillator is larger, resulting in a larger overall volume of the oscillator, which is inconvenient to use in smaller products (such as health care products, cleaning products, massage products, electronic daily appliances), and has a narrow scope of application. Utility Model Content

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the defects of the linear oscillator in the prior art, that is, the radial diameter is large, resulting in a large overall volume of the oscillator, which is inconvenient to be used in products with smaller volume and has a narrow scope of application, thereby providing a slender linear high-frequency oscillator and electric toothbrush.

[0006] According to the first aspect of the utility model, a slender linear high-frequency oscillator is provided, comprising:

[0007] The housing is penetrated in the axial direction to form a mounting cavity;

[0008] A leaf spring assembly is arranged at an opening at one end of the housing along the axial direction;

[0009] A coil winding module is arranged at an opening of one end of the housing away from the leaf spring assembly, the coil winding module comprises an iron core, the iron core comprises a horizontal portion and a connecting portion, the horizontal portion is axially arranged in the installation cavity, one end of the horizontal portion away from the leaf spring assembly extends to the outside of the installation cavity, and is turned over to form the connecting portion; an insulating frame is sleeved on the portion of the iron core extending outside the installation cavity, one end of the insulating frame abuts against the end surface of the housing away from the leaf spring assembly, a coil is wound on the insulating frame, and the wire ends at both ends of the coil are used to electrically connect to an external AC power supply to form a power supply circuit;

[0010] The mover module is axially slidably connected in the installation cavity, and one end is connected to the leaf spring assembly; the projection of the mover module in a direction perpendicular to the axial direction at least partially overlaps with the horizontal part, and a magnetic steel is provided on the end surface facing the horizontal part.

[0011] According to the utility model, a slender linear high-frequency oscillator has at least the following technical effects:

[0012] 1. The mover module with the magnetic steel is arranged in the installation cavity at one end close to the leaf spring assembly, and the coil winding module is arranged at the end of the housing away from the leaf spring assembly. One end of the horizontal part of the iron core extends into the installation cavity and overlaps with the magnetic steel at least partially. When alternating current is passed through the linear high-frequency oscillator, the horizontal part alternately forms N-level and S-level changes toward the end face of the magnetic steel. At this time, according to the principle that the same poles of the magnetic field repel each other and the opposite poles attract each other, the magnetic steel and the horizontal part will produce a phenomenon of attraction and repulsion (for example, when the same poles of two magnets approach each other, due to the mutual repulsion of the magnetic field, the two magnets of the same pole are like a force that separates them, while the two magnets of different poles will attract each other). In this way, because the alternating current is passed through the coil, the horizontal part faces the end face of the magnetic steel, and the horizontal part faces the end face of the magnetic steel. The magnetic poles formed on the end faces of the magnetic steel change alternately, so that the mover module can reciprocate in an axial straight line between the leaf spring assembly and the insulating frame, and the leaf spring assembly can effectively prevent the mover module from producing radial displacement, thereby ensuring the stability of the structure. In particular, when high-frequency alternating current is provided to produce high-frequency linear oscillations, the mover module always maintains axial straight line reciprocating motion without radial displacement, thereby achieving high-frequency linear oscillations on the basis of arranging the insulating frame and the magnetic steel axially staggered, thereby reducing the cross-sectional dimensions of the linear high-frequency oscillator perpendicular to the axial direction, thereby effectively reducing the overall volume of the linear high-frequency oscillator so that it can be applied to smaller products, with a wider range of applications and improved market competitiveness.

[0013] 2. By winding the coil and setting it on the insulating frame outside the end of the housing away from the leaf spring assembly, compared with the prior art that sets the coil in the middle of the installation cavity or near the front end of the leaf spring assembly, on the one hand, the coil of the linear high-frequency oscillator basically does not directly participate in the mutual movement of the mover module and the leaf spring assembly, that is, it is basically not affected by the mutual movement of the mover module and the leaf spring assembly. When AC power is passed to the linear high-frequency oscillator, the risk of the mover module in a high-frequency vibration state acting on the coil, causing the structure of the two ends of the coil or the wire body to become loose and directly broken, can be avoided, thereby ensuring the service life of the linear high-frequency oscillator. On the other hand, when the linear high-frequency oscillator is connected to an external AC power supply, it is only necessary to directly connect the two ends of the coil to the external AC power supply to complete the assembly. The assembly is simple and the defective rate is reduced. There is no process of outputting through two welding or conduction in the middle, and there is no problem of selecting a customized PCB half for welding, thereby reducing the manufacturing cost of the linear high-frequency oscillator and improving its market competitiveness.

[0014] Preferably, the iron core includes two horizontal parts, the two horizontal parts are arranged opposite to each other along the thickness direction of the casing, and the connecting part is connected between the end surfaces of the two horizontal parts extending outside the mounting cavity to form a "U"-shaped structure; the mover module is at least partially located between the two horizontal parts, and the magnets are respectively arranged on the end surfaces facing the two horizontal parts; the magnetic poles of the two magnets at one end facing away from each other along the thickness direction of the casing are opposite.

[0015] Preferably, the insulating skeleton includes a first insulating part and a second insulating part which are separately arranged, and the first insulating part and the second insulating part are arranged opposite to each other along the width direction of the casing, and the first insulating part and the second insulating part are respectively recessed with a first groove and a second groove at one end facing each other, and the end surface of the first insulating part facing the second insulating part is provided with a plug-in hole, and the end surface of the second insulating part facing the first insulating part is provided with a plug-in column, and the plug-in column matches the plug-in hole; when the first insulating part and the second insulating part are assembled to form the insulating skeleton, the plug-in column is inserted into the plug-in hole, and the first groove and the second groove form an assembly cavity for accommodating the part of the iron core extending outside the installation cavity.

[0016] Preferably, a clamp is provided in the installation cavity, and the clamp is located between the mover module and the insulating frame, and an axial guide sleeve is provided through the clamp; a transmission shaft is connected between the mover module and the leaf spring assembly, and one end of the transmission shaft passes through the leaf spring assembly and extends to the outside of the casing, and is used to connect to an external structure; the other end of the transmission shaft passes through the mover module, and is axially slidably connected in the axial guide sleeve.

[0017] Preferably, the card is detachably inserted in the installation cavity, and positioning parts are convexly provided on the inner walls of both sides of the housing in the width direction, and the positioning parts abut against the end surface of the card facing the mover module; an inserting part is convexly provided at the four corners of the end surface of the insulating frame facing the housing, and the four inserting parts are used for interference fit insertion in the installation cavity, and the four inserting parts abut against the end surfaces of the card facing each other along the axial direction;

[0018] And / or, the axial guide sleeve is configured as a linear ball bearing.

[0019] Preferably, a first connecting groove is provided on the housing at a position corresponding to the horizontal portion, and the first connecting groove is used for embedding the horizontal portion;

[0020] And / or, a second connecting groove is recessed on the outer side wall of the clamp at a position corresponding to the horizontal portion, and the second connecting groove is used for embedding the horizontal portion.

[0021] Preferably, the end surface of the magnetic steel located at the relatively upper end of the movable module along the thickness direction of the casing, which is away from the other magnetic steel, is arranged with an N magnetic pole portion and an S magnetic pole portion along the axial interval, and the end surface of the magnetic steel located at the relatively lower end of the movable module along the thickness direction of the casing, which is away from the other magnetic steel, is arranged with an S magnetic pole portion and an N magnetic pole portion along the axial interval.

[0022] Preferably, the leaf spring assembly comprises at least one planar scroll leaf spring, and two flanges are arranged on the outer circumferential surface of the planar scroll leaf spring at a circumferential interval of ninety degrees, and the flanges are welded to the casing.

[0023] Preferably, an installation groove is recessed at the position corresponding to the two flanges on the end surface of the housing facing the leaf spring assembly, and during assembly, the flanges are clamped in the corresponding installation grooves.

[0024] According to the second aspect of the present invention, an electric toothbrush is provided, comprising the linear high-frequency oscillator provided in the first aspect.

[0025] An electric toothbrush according to the utility model has at least the following technical effects:

[0026] 1. The linear high-frequency oscillator is configured by arranging a mover module with a magnetic steel in an installation cavity at one end close to the leaf spring assembly, and a coil winding module at an end of the housing away from the leaf spring assembly. One end of the horizontal portion of the iron core extends into the installation cavity and overlaps at least partially with the magnetic steel. When alternating current is applied to the linear high-frequency oscillator, the horizontal portion alternately forms N-level and S-level changes toward the end face of the magnetic steel. At this time, according to the principle that the same poles of the magnetic field repel each other and the opposite poles attract each other, the magnetic steel and the horizontal portion will produce a phenomenon of attraction and repulsion (for example, when the same poles of two magnets approach each other, due to the mutual repulsion of the magnetic field, the two magnets of the same pole are like a force that separates them, while the two magnets of different poles will attract each other). In this way, because alternating current is applied to the coil, the horizontal portion faces the end face of the magnetic steel, and the magnetic steel and the horizontal portion are attracted to each other. The magnetic poles formed on the end faces of the magnetic steel change alternately, so that the mover module can reciprocate in an axial straight line between the leaf spring assembly and the insulating frame, and the leaf spring assembly can effectively prevent the mover module from producing radial displacement, thereby ensuring the stability of the structure. In particular, when high-frequency alternating current is provided to produce high-frequency linear oscillations, the mover module always maintains axial straight line reciprocating motion without radial displacement, thereby achieving high-frequency linear oscillations on the basis of arranging the insulating frame and the magnetic steel axially staggered, thereby reducing the cross-sectional size of the linear high-frequency oscillator perpendicular to the axial direction, thereby effectively reducing the overall volume of the linear high-frequency oscillator, making the volume of the electric toothbrush more compact, enriching the customer's selection range, and improving the customer's sense of use and experience.

[0027] 2. By winding the coil on an insulating frame located outside the end of the casing away from the leaf spring assembly, compared with the prior art in which the coil is set in the middle of the installation cavity or near the front end of the leaf spring assembly, the coil in the electric toothbrush basically does not directly participate in the mutual movement between the mover module and the leaf spring assembly, that is, it is basically not affected by the mutual movement between the mover module and the leaf spring assembly. When alternating current is passed through the linear high-frequency oscillator, the risk of the mover module in a high-frequency vibration state acting on the coil, resulting in loose structure and direct breakage of the wire ends or wire body of the coil, can be avoided, thereby ensuring the service life of the linear high-frequency oscillator and thus ensuring the service life of the electric toothbrush.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 This is a schematic diagram of the exploded structure of a slender linear high-frequency oscillator of this embodiment;

[0031] Figure 2 is a schematic diagram of a cross-sectional front view of a slender linear high-frequency oscillator of the present embodiment;

[0032] Figure 3 for Figure 2 Schematic diagram of the structure with the core removed;

[0033] Figure 4 A schematic top view of the structure of a slender linear high-frequency oscillator according to this embodiment;

[0034] Figure 5 It is a schematic structural diagram of an insulating skeleton in a slender linear high-frequency oscillator of this embodiment;

[0035] Figure 6 It is a schematic structural diagram of a first insulating portion in a slender linear high-frequency oscillator of this embodiment;

[0036] Figure 7 is a schematic structural diagram of a second insulating portion in an elongated linear high-frequency oscillator of this embodiment;

[0037] Figure 8 It is a structural schematic diagram of a card member in a slender linear high-frequency oscillator of this embodiment;

[0038] Fig. 9 It is a schematic structural diagram of a casing in a slender linear high-frequency oscillator of this embodiment;

[0039] Fig.10 It is a schematic structural diagram of a planar scroll leaf spring in a slender linear high-frequency oscillator of this embodiment.

[0040] Description of reference numerals:

[0041] 1-housing, 11-installation cavity, 12-positioning portion, 13-first connecting groove, 14-installation groove;

[0042] 2- iron core, 21- horizontal part, 22- connecting part;

[0043] 3-insulating skeleton, 31-first insulating part, 311-first groove, 312-plug hole, 32-second insulating part, 321-second groove, 322-plug column, 33-assembly cavity, 34-plug part;

[0044] 4- coil;

[0045] 5-motor module, 51-magnetic steel;

[0046] 6-clip, 61-axial guide sleeve, 62-second connecting groove;

[0047] 7- Transmission shaft;

[0048] 81- plane scroll leaf spring, 811- flange, 812- mounting hole, 82- compression spring. DETAILED DESCRIPTION

[0049] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0050] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship 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 therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0053] Embodiment 1

[0054] like Figures 1 to 4 The present embodiment shows a slender linear high-frequency oscillator, comprising a housing 1, wherein an installation cavity 11 is formed in the housing 1 along the axial direction; a leaf spring assembly is arranged at an opening at one end of the housing 1, and a coil winding module is arranged at an opening at one end of the housing 1 away from the leaf spring assembly, wherein the coil winding module comprises an iron core 2, wherein the iron core 2 comprises a horizontal portion 21 and a connecting portion 22, wherein the horizontal portion 21 is arranged in the installation cavity 11 along the axial direction, wherein the end of the horizontal portion 21 away from the leaf spring assembly extends to the outside of the installation cavity 11, and is turned inwardly along the thickness direction of the housing 1 to form the connecting portion 22. Part 22; the portion of the core 2 extending outside the installation cavity 11 is sleeved with an insulating skeleton 3, one end of the insulating skeleton 3 abuts against the end face of the housing 1 away from the leaf spring assembly, a coil 4 is wound on the insulating skeleton 3, and the wire ends at both ends of the coil 4 are used to electrically connect to an external AC power supply to form a power supply circuit; a mover module 5 is axially slidably connected in the installation cavity 11, one end of the mover module 5 is connected to the leaf spring assembly; the projection of the mover module 5 in a direction perpendicular to the axial direction at least partially overlaps with the horizontal portion 21, and a magnetic steel 51 is provided on the end face facing the horizontal portion 21. It can be understood that the axial direction mentioned in the text refers to Figure 1 The axial direction of the housing 1 is referred to as the thickness direction of the housing 1. Figure 1 The first direction in the text refers to the width direction of the housing 1. Figure 1 The second direction, perpendicular to the axial direction, is Figure 1 The first direction or the second direction in.

[0055] The linear high-frequency oscillator of this embodiment is achieved by setting the mover module 5 with the magnetic steel 51 in the installation cavity 11 at one end close to the leaf spring assembly, and the coil winding module is set at the end of the housing 1 away from the leaf spring assembly. One end of the horizontal portion 21 of the iron core 2 extends into the installation cavity 11 and overlaps with the magnetic steel 51 at least partially. When alternating current is passed through the linear high-frequency oscillator of this embodiment, the horizontal portion 21 alternately forms N-level and S-level changes toward the end face of the magnetic steel 51. At this time, according to the principle that the same poles of the magnetic field repel each other and the opposite poles attract each other, there will be a phenomenon of attraction and repulsion between the magnetic steel 51 and the horizontal portion 21 (for example, when the same poles of two magnets approach each other, due to the mutual repulsion of the magnetic field, the two magnets of the same pole are like a force that separates them, and the two magnets of different poles will attract each other). In this way, because the alternating current passed through the coil 4 is The current causes the magnetic poles formed by the horizontal portion 21 toward the end surface of the magnetic steel 51 to change alternately, so that the mover module 5 can reciprocate axially in a straight line between the leaf spring assembly and the insulating skeleton 3, and the leaf spring assembly can effectively prevent the mover module 5 from generating radial displacement, thereby ensuring the stability of the structure. In particular, when a high-frequency alternating current is provided to generate a high-frequency linear oscillation, the mover module 5 always maintains an axial straight line reciprocating motion without generating radial displacement, thereby achieving high-frequency linear oscillation on the basis of arranging the insulating skeleton 3 and the magnetic steel 51 axially staggered with each other, thereby reducing the cross-sectional dimension of the linear high-frequency oscillator of this embodiment perpendicular to the axial direction, so that the overall volume of the linear high-frequency oscillator of this embodiment is effectively reduced, so that it can be applied to products with smaller volume, with a wider range of applications, and improved market competitiveness. The coil 4 is also wound and arranged on the insulating frame 3 outside the end of the casing 1 away from the leaf spring assembly. Compared with the prior art in which the coil 4 is arranged in the middle of the installation cavity 11 or near the front end of the leaf spring assembly, on the one hand, the coil 4 of the linear high-frequency oscillator of this embodiment basically does not directly participate in the mutual movement between the mover module 5 and the leaf spring assembly, that is, it is basically not affected by the mutual movement between the mover module 5 and the leaf spring assembly. When alternating current is passed through the linear high-frequency oscillator of this embodiment, the risk of the mover module 5 in a high-frequency vibration state acting on the coil 4, resulting in loose structure and direct breakage of the wire ends or wire body of the coil 4 at both ends, can be avoided, thereby ensuring the service life of the linear high-frequency oscillator of this embodiment.On the other hand, compared with the prior art in which the coil 4 is arranged in the middle of the mounting cavity 11 or near the front end of the leaf spring assembly, the wire ends of the coil 4 need to be welded and fixedly connected to the customized PCB board through a conductive spring in order to achieve electrical connection with the external AC power supply, which has directional customization requirements for customer use and has poor versatility. The linear high-frequency oscillator of this embodiment is wound around the coil 4 and arranged outside the insulating frame 3 located outside the end of the casing 1 away from the leaf spring assembly. The assembly can be completed by directly connecting the wire ends of the two ends of the coil 4 to the external AC power supply. The assembly is simple and the defect rate is reduced. There is no process of outputting through two welding or conduction in the middle, and there is no problem of selecting a customized PCB half for welding. The manufacturing cost of the linear high-frequency oscillator of this embodiment is reduced and the market competitiveness is improved.

[0056] like Figure 1 and Figure 2 As shown, optionally, the iron core 2 includes two horizontal portions 21, and the two horizontal portions 21 are arranged relatively to each other along the thickness direction of the casing 1, and the connecting portion 22 is connected between the end surfaces of the two horizontal portions 21 extending outside the mounting cavity 11 to form a "U"-shaped structure; the mover module 5 is at least partially located between the two horizontal portions 21, and the magnetic steels 51 are respectively arranged on the end surfaces facing the two horizontal portions 21; the magnetic poles of the two magnetic steels 51 at one end facing away from each other along the thickness direction of the casing 1 are opposite. Because when alternating current is passed through the coil winding module, the magnetic poles of the ends of the two horizontal parts 21 facing each other are opposite, so by setting the magnetic poles of the end faces of the two magnets 51 facing away from each other to be opposite, when alternating current is passed through the coil winding module, the two horizontal parts 21 can simultaneously apply basically the same repulsive force or attractive force to the two ends of the movable module 5 along the thickness direction of the casing 1, so that the forces on the movable module 5 in the thickness direction of the casing 1 are balanced, avoiding the movable module 5 from offsetting in the thickness direction of the casing 1, ensuring structural stability, especially when high-frequency alternating current is provided to generate high-frequency linear oscillations, the movable module 5 always maintains axial linear reciprocating motion, and does not generate offset in the thickness direction of the casing 1; thereby achieving stable output of axial reciprocating oscillations while reducing the unnecessary waste of power consumption of the linear high-frequency oscillator of this embodiment, and improving the power endurance of the product equipped with the linear high-frequency oscillator of this embodiment while improving the customer's sense of use and experience.

[0057] Optionally, the end face of the magnet 51 located at the relatively upper end of the mover module 5 along the thickness direction of the casing 1, which faces away from the other magnet 51, is arranged with an N magnetic pole portion and an S magnetic pole portion at intervals in the axial direction, and the end face of the magnet 51 located at the relatively lower end of the mover module 5 along the thickness direction of the casing 1, which faces away from the other magnet 51, is arranged with an S magnetic pole portion and an N magnetic pole portion at intervals in the axial direction. This arrangement makes it possible to drive the mover module 5 to perform linear reciprocating motion in the axial direction even if only one horizontal portion 21 faces one end of the magnet 51 and normally undergoes alternating magnetic pole changes when alternating current is applied. At the same time, the N magnetic pole portion and the S magnetic pole portion can be formed on the magnet 51 by magnetizing the magnet 51, which has a simple structure, and the processing technology is easier to implement and convenient for mass production. It can be understood that the relative upper end and the relative lower end along the thickness direction of the casing 1 described in the text are based on Figure 2 perspective.

[0058] like Figure 1 , Figure 5 , Figure 6 and Figure 7 As shown, optionally, the insulating skeleton 3 includes a first insulating part 31 and a second insulating part 32 which are separately arranged, and the first insulating part 31 and the second insulating part 32 are arranged relatively to each other along the width direction of the casing 1, and the first insulating part 31 and the second insulating part 32 are respectively recessed with a first groove 311 and a second groove 321 at one end facing each other, and the first insulating part 31 is provided with a plug hole 312 on the end face of the second insulating part 32, and the second insulating part 32 is provided with a plug column 322 on the end face of the first insulating part 31, and the plug column 322 matches the plug hole 312. By setting the insulating skeleton 3 as a first insulating part 31 and a second insulating part 32 that are detachably connected, in the process of assembling the coil winding module, it is only necessary to relatively set the first insulating part 31 and the second insulating part 32 on both sides of the connecting part 22 along the width direction of the casing 1, and align the plug post 322 and the plug hole 312, and then apply pressing force to accurately assemble the first insulating part 31 and the second insulating part 32 to form an insulating skeleton 3 with an assembly cavity 33, so that the insulating skeleton 3 is sleeved on the part of the iron core 2 extending outside the installation cavity 11, which is convenient for assembly.

[0059] Specifically, the insulating frame 3 is made of plastic material, which is light in weight and has good insulating effect.

[0060] like Figures 1 to 3 as well as Figure 8As shown, optionally, a clamp 6 is provided in the installation cavity 11, and the clamp 6 is located between the mover module 5 and the insulating frame 3, and an axial guide sleeve 61 is provided through the clamp 6; a transmission shaft 7 is connected between the mover module 5 and the leaf spring assembly, and one end of the transmission shaft 7 passes through the leaf spring assembly and extends to the outside of the housing 1, and is used to connect to an external structure (such as a toothbrush head, a massage head, etc.); the other end of the transmission shaft 7 passes through the mover module 5, and is axially slidably connected in the axial guide sleeve 61. The axial guide sleeve 61 is used to provide a fulcrum for the end of the transmission shaft 7 that is away from the external structure and can slide in an axial straight line. On the one hand, it can cooperate with the elastic deformation and elastic reset of the leaf spring assembly to ensure that the mover module 5 and the transmission shaft 7 always maintain axial straight line reciprocating motion without radial deviation, thereby ensuring the stability of the structure; on the other hand, it can greatly reduce the vibration generated by the rear end of the transmission shaft 7 that is axially away from the leaf spring assembly of the casing 1 when the linear high-frequency oscillator of this embodiment performs high-frequency linear motion, thereby preventing the casing 1 from vibrating intensively at the rear end of the leaf spring assembly that is axially away from the leaf spring assembly (i.e., the user's grip) and affecting use, thereby improving the user's sense of use and experience.

[0061] Optionally, the axial guide sleeve 61 is configured as a linear ball bearing. The linear ball bearing can provide a fulcrum for the end of the transmission shaft 7 away from the external structure to slide along the axial line, and even if the transmission shaft 7 rotates around the axial direction, it can be converted into axial linear motion to reduce energy consumption.

[0062] like Figures 1 to 7 as well as Fig. 9 As shown, optionally, the clamp 6 can be detachably inserted into the installation cavity 11, and the inner walls on both sides of the casing 1 along the width direction are provided with positioning portions 12, and the positioning portions 12 abut against the end faces of the clamp 6 facing the mover module 5; the four corners of the end face of the insulating skeleton 3 facing the casing 1 are provided with an insert portion 34, and the four insert portions 34 are used for interference fit and insertion in the installation cavity 11, and the four insert portions 34 abut against the end faces of the clamp 6 facing each other along the axial direction. By positioning the depth of the card 6 inserted into the installation cavity 11 through the positioning portion 12, the position of the card 6 assembled in the installation cavity 11 can be accurately determined. At the same time, the structure surrounded by four insertion portions 34 is inserted into the installation cavity 11 in an interference fit manner, so that the freedom of the card 6 to move axially away from the mover module 5 is restricted on the basis of assembling the coil winding module and the casing 1 into one body, thereby assembling the card 6 and the casing 1 into one body on the basis of assembling the coil winding module and the casing 1 into one body, simplifying the assembly process and improving the product yield.

[0063] like Figures 1 to 4 as well as Fig. 9As shown, optionally, a first connecting groove 13 is provided on the casing 1 at a position corresponding to the horizontal part 21, and the first connecting groove 13 is used for the horizontal part 21 to be embedded, so as to position the installation position of the horizontal part 21, so as to ensure the accuracy of the positional relationship between the horizontal part 21 and the magnetic steel 51, thereby improving the product assembly yield.

[0064] like Figure 1 , Figure 3 and Figure 8 As shown, optionally, a second connecting groove 62 is recessed on the outer wall of the clamp 6 at a position corresponding to the horizontal portion 21. The second connecting groove 62 is used for the horizontal portion 21 to be embedded, and plays a role in positioning the installation position of the horizontal portion 21, so as to ensure the accuracy of the positional relationship between the horizontal portion 21 and the magnetic steel 51, and improve the product assembly yield. At the same time, by observing whether the second connecting groove 62 is aligned with the first connecting groove 13, it is convenient to intuitively judge whether the position of the clamp 6 assembled in the installation cavity 11 is accurate.

[0065] like Figures 1 to 3 as well as Fig. 9 and Fig.10 As shown, optionally, the leaf spring assembly includes at least one plane scroll leaf spring 81, preferably one plane scroll leaf spring 81, and two flanges 811 are arranged at intervals of ninety degrees in the circumferential direction on the outer circumference of the plane scroll leaf spring 81, and the flanges 811 are welded to the housing 1. The plane scroll leaf spring 81 can better bear the deflection force in the direction perpendicular to the axial direction, and the structure is more stable, which can not only improve the reset and positioning effect on the mover module 5, but also reduce the friction and noise generated when the mover module 5 slides, and effectively prolong the service life; at the same time, by arranging two flanges 811 as welding convex points at intervals of ninety degrees in the circumferential direction on the outer circumference of each plane scroll leaf spring 81, and establishing the leaf spring assembly as a thin sheet structure composed of a single plane scroll leaf spring 81, the rebound resistance of the leaf spring assembly can be effectively reduced, and a sharp vibration sense along the axial straight line can be achieved, and energy consumption can be reduced. The plane scroll leaf spring 81 is welded to the housing 1 at two points, which is easy to install. It ensures that the plane scroll leaf spring 81 has sufficient connection stability and increases the axial movement range of the plane scroll leaf spring 81 at the front of elastic failure.

[0066] like Fig.10 As shown, specifically, a mounting hole 812 is formed in the middle of the plane scroll leaf spring 81 along the axial direction, and the transmission shaft 7 passes through the mounting hole 812 and is fixedly connected to the plane scroll leaf spring 81. Considering that the mounting hole 812 is provided in the middle of the plane scroll leaf spring 81, the connection strength at this position is slightly reduced. In order to ensure the connection strength between the plane scroll leaf spring 81 and the transmission shaft 7, as shown in FIG. Figures 1 to 4 As shown, more specifically, a compression spring 82 is protruded from the middle portion of the planar spiral leaf spring 81 .

[0067] In specific applications, the number of the planar scroll leaf springs 81 in the leaf spring assembly is reasonably increased or decreased according to the actual vibration requirements of the linear high-frequency oscillator, such as the vibration frequency and vibration amplitude. For example, in other embodiments, the leaf spring assembly includes two, three, four or five planar scroll leaf springs 81.

[0068] like Fig. 9 and Fig.10 As shown, optionally, a mounting groove 14 is recessed at the position of the two flanges 811 on the end surface of the casing 1 facing the leaf spring assembly. When the plane scroll leaf spring 81 is assembled and connected to the casing 1, positioning is performed through the position of the mounting groove 14 and the flange 811, so that the plane scroll leaf spring 81 can be installed at the accurate position of the opening of the casing 1 for laser welding and fixation; and the contact connection area between the plane scroll leaf spring 81 and the casing 1 is increased, and the connection strength between the plane scroll leaf spring 81 and the casing 1 is increased, thereby ensuring the movement stability of the mover module 5.

[0069] Embodiment 2

[0070] like Figures 1 to 10 The figure shows an electric toothbrush provided in this embodiment, including the linear high-frequency oscillator described in the first embodiment.

[0071] The linear high-frequency oscillator of the electric toothbrush of the present embodiment is achieved by setting the mover module 5 with the magnetic steel 51 in the installation cavity 11 at one end close to the leaf spring assembly, and the coil winding module is set at the end of the housing 1 away from the leaf spring assembly. One end of the horizontal portion 21 of the iron core 2 extends into the installation cavity 11 and overlaps with the magnetic steel 51 at least partially. When alternating current is passed through the linear high-frequency oscillator, the horizontal portion 21 alternately forms N-level and S-level changes toward the end face of the magnetic steel 51. At this time, according to the principle that like poles of the magnetic field repel each other and unlike poles attract each other, there will be a phenomenon of attraction and repulsion between the magnetic steel 51 and the horizontal portion 21 (for example, when the same poles of two magnets approach each other, due to the mutual repulsion of the magnetic field, the two magnets of the same pole are like a force that separates them, and the two magnets of different poles will attract each other). In this way, because alternating current is passed through the coil 4, , so that the magnetic poles formed by the end surface of the horizontal portion 21 toward the magnetic steel 51 change alternately, so that the mover module 5 reciprocates in an axial straight line between the leaf spring assembly and the insulating skeleton 3, and the leaf spring assembly can effectively prevent the mover module 5 from producing radial deviation, ensuring the stability of the structure, especially when providing high-frequency alternating current to produce high-frequency linear oscillations, the mover module 5 always maintains axial straight line reciprocating motion without radial deviation, thereby achieving high-frequency linear oscillations on the basis of arranging the insulating skeleton 3 and the magnetic steel 51 axially staggered, and then reducing the cross-sectional size of the linear high-frequency oscillator perpendicular to the axial direction, so that the overall volume of the linear high-frequency oscillator is effectively reduced, making the volume of the electric toothbrush of this embodiment more miniaturized, enriching the customer's selection range, and improving the customer's sense of use and experience.

[0072] The electric toothbrush of the present embodiment also winds the coil 4 around the insulating frame 3 located outside the end of the housing 1 away from the leaf spring assembly. Compared with the prior art in which the coil 4 is located in the middle of the mounting cavity 11 of the housing 1 or near the front end of the leaf spring assembly, on the one hand, the coil 4 in the electric toothbrush of the present embodiment basically does not directly participate in the mutual movement between the mover module 5 and the leaf spring assembly, that is, it is basically not affected by the mutual movement between the mover module 5 and the leaf spring assembly. When alternating current is passed through the linear high-frequency oscillator, the risk of the mover module 5 in a high-frequency vibration state acting on the coil 4, resulting in loose structure and direct breakage of the wire ends or wire body of the coil 4, can be avoided, thereby ensuring the service life of the linear high-frequency oscillator and thus ensuring the service life of the electric toothbrush of the present embodiment. On the other hand, compared with the prior art in which the coil 4 is arranged in the middle of the mounting cavity 11 or near the front end of the leaf spring assembly, the wire end of the coil 4 needs to be welded and fixedly connected to the customized PCB board through a conductive spring in order to achieve electrical connection with the external AC power supply, which has directional customization requirements for customer use and has poor versatility; the linear high-frequency oscillator in the electric toothbrush of this embodiment is wound around the coil 4 and arranged outside the insulating frame 3 located outside the end of the casing 1 away from the leaf spring assembly. The assembly can be completed by directly connecting the wire ends of the coil 4 at both ends to the external AC power supply. The assembly is simple and the defect rate is reduced. There is no process involved in the middle to output through two welding or conduction mode, and there is no problem of selecting a customized PCB half for welding. The manufacturing cost of the linear high-frequency oscillator in the electric toothbrush of this embodiment is reduced and the market competitiveness is improved.

[0073] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A slender linear high frequency oscillator, characterized in that: include: The housing (1) is formed with a mounting cavity (11) extending therethrough in the axial direction; A leaf spring assembly is arranged at an opening at one end of the housing (1) along the axial direction; A coil winding module is arranged at an opening of one end of the housing (1) away from the leaf spring assembly, the coil winding module comprises an iron core (2), the iron core (2) comprises a horizontal portion (21) and a connecting portion (22), the horizontal portion (21) is axially arranged in the installation cavity (11), the end of the horizontal portion (21) away from the leaf spring assembly extends to the outside of the installation cavity (11) and is turned over to form the connecting portion (22); an insulating frame (3) is sleeved on the portion of the iron core (2) extending outside the installation cavity (11), one end of the insulating frame (3) abuts against the end surface of the housing (1) away from the leaf spring assembly, a coil (4) is wound on the insulating frame (3), and the wire ends at both ends of the coil (4) are used to electrically connect to an external AC power supply to form a power supply circuit; A mover module (5) is slidably connected in the installation cavity (11) along the axial direction, and one end is connected to the leaf spring assembly; a projection of the mover module (5) along a direction perpendicular to the axial direction at least partially overlaps with the horizontal portion (21), and a magnetic steel (51) is provided on the end surface facing the horizontal portion (21).

2. A slender linear high frequency oscillator according to claim 1, characterized in that: The iron core (2) comprises two horizontal portions (21), the two horizontal portions (21) are arranged opposite to each other along the thickness direction of the housing (1), and the connecting portion (22) is connected between the end surfaces of the two horizontal portions (21) extending outside the mounting cavity (11) to form a "U"-shaped structure; the mover module (5) is at least partially located between the two horizontal portions (21), and the magnetic steels (51) are respectively arranged on the end surfaces facing the two horizontal portions (21); the magnetic poles of the two magnetic steels (51) at one end facing away from each other along the thickness direction of the housing (1) are opposite.

3. A slender linear high frequency oscillator according to claim 2, characterized in that: The insulating frame (3) comprises a first insulating portion (31) and a second insulating portion (32) which are separately arranged. The first insulating portion (31) and the second insulating portion (32) are arranged opposite to each other along the width direction of the housing (1). The first insulating portion (31) and the second insulating portion (32) are respectively provided with a first groove (311) and a second groove (321) on one end facing each other. The end surface of the first insulating portion (31) facing the second insulating portion (32) is provided with a plug-in hole (312). (32) A plug post (322) is provided on the end surface facing the first insulating part (31), and the plug post (322) matches the plug hole (312); when the first insulating part (31) and the second insulating part (32) are assembled to form the insulating skeleton (3), the plug post (322) is inserted into the plug hole (312), and the first groove (311) and the second groove (321) form an assembly cavity (33) for accommodating the portion of the iron core (2) extending outside the installation cavity (11).

4. A slender linear high frequency oscillator according to any one of claims 1 to 3, characterized in that: A clamp (6) is provided in the installation cavity (11), the clamp (6) is located between the mover module (5) and the insulating frame (3), and an axial guide sleeve (61) is provided through the clamp (6); a transmission shaft (7) is connected between the mover module (5) and the leaf spring assembly, one end of the transmission shaft (7) passes through the leaf spring assembly and extends to the outside of the housing (1) and is used for connecting to an external structure; the other end of the transmission shaft (7) passes through the mover module (5) and is axially slidably connected in the axial guide sleeve (61).

5. A slender linear high frequency oscillator according to claim 4, characterized in that: The clamp (6) is detachably inserted into the installation cavity (11); positioning portions (12) are protrudingly provided on the inner walls of both sides of the housing (1) in the width direction; the positioning portions (12) abut against the end surface of the clamp (6) facing the mover module (5); an insert portion (34) is protrudingly provided at the four corners of the end surface of the insulating frame (3) facing the housing (1); the four insert portions (34) are used for interference fit insertion into the installation cavity (11); the four insert portions (34) abut against the end surfaces of the clamp (6) facing each other in the axial direction; And / or, the axial guide sleeve (61) is configured as a linear ball bearing.

6. A slender linear high frequency oscillator according to claim 4, characterized in that: A first connecting groove (13) is provided on the housing (1) at a position corresponding to the horizontal portion (21), and the first connecting groove (13) is used for embedding the horizontal portion (21); And / or, a second connecting groove (62) is recessed on the outer wall of the clamp (6) at a position corresponding to the horizontal portion (21), and the second connecting groove (62) is used for embedding the horizontal portion (21).

7. A slender linear high frequency oscillator according to claim 2 or 3, characterized in that: The end surface of the magnetic steel (51) located at the upper end of the movable module (5) along the thickness direction of the housing (1) facing away from the other magnetic steel (51) is arranged with an N magnetic pole portion and an S magnetic pole portion at intervals in the axial direction, and the end surface of the magnetic steel (51) located at the lower end of the movable module (5) along the thickness direction of the housing (1) is arranged with an S magnetic pole portion and an N magnetic pole portion at intervals in the axial direction.

8. A slender linear high frequency oscillator according to any one of claims 1 to 3, characterized in that: The leaf spring assembly comprises at least one planar scroll leaf spring (81), and two flanges (811) are arranged on the outer peripheral surface of the planar scroll leaf spring (81) at a circumferential interval of ninety degrees, and the flanges (811) are welded to the casing (1).

9. A slender linear high frequency oscillator according to claim 8, characterized in that: An installation groove (14) is recessed at the position of the two flanges (811) on the end surface of the housing (1) facing the leaf spring assembly. During assembly, the flanges (811) are clamped in the corresponding installation grooves (14).

10. An electric toothbrush, characterized in that: A linear high frequency oscillator comprising any one of claims 1 to 9.

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