Linear motor

Abstract

The application provides a linear motor, which comprises a shell, a vibrator assembly, a stator assembly fixed to the shell, and an elastic member; the stator assembly comprises a core, a coil fixed to the core, and a conductive member for electrically connecting with the coil; the coil is provided with an incoming wire terminal and an outgoing wire terminal; one of the fixed end portions of the core at both ends along the vibration direction is provided with a wire passing groove; the incoming wire terminal and the outgoing wire terminal are both electrically connected with the conductive member through the wire passing groove; the vibrator assembly comprises a mass block and two first magnetic steels distributed and arranged on both sides of the coil along a first direction; and the projections of the incoming wire terminal and the outgoing wire terminal and the two first magnetic steels in a second direction perpendicular to the vibration direction and the first direction do not coincide. Compared with the related art, the linear motor has high internal space utilization and good vibration effect.

Description

Technical Field

[0001] This invention relates to a motor device, and more particularly to a linear motor. Background Technology

[0002] A linear motor is a drive device that directly converts electrical energy into linear motion mechanical energy. Due to its advantages such as fast response speed, high vibration accuracy, and relatively compact structure, it is widely used in consumer electronics products such as smartphones, wearable devices, and game consoles, primarily to implement vibration feedback functions and enhance the user experience. In the structure of a linear motor, the stator, as a fixed component, typically includes coils, a magnetic circuit frame, and other components. It receives electrical energy through connection with conductive parts (usually flexible printed circuit boards, FPCs), providing the power basis for the motor's normal operation. The oscillator, as a moving component, performs reciprocating linear motion under the magnetic force generated by the stator, thereby producing the desired vibration effect.

[0003] In existing linear motors, to achieve a stable electrical connection between the stator and the conductive components, the two output terminals of the stator are typically located on opposite sides of the stator. During actual assembly, these two output terminals are connected to the corresponding contact points on the conductive components through welding, plugging, or other methods to form a complete current loop.

[0004] However, since the lead-out terminals on both sides of the stator and the wiring sections formed by their connection with conductive components occupy a certain amount of space, a predetermined safety space must be reserved between the stator and the wiring sections to avoid collisions and interference between the oscillator and the wiring sections during reciprocating motion. This reserved space not only significantly reduces the internal space utilization of the motor, making it difficult to further miniaturize the overall motor size, but also restricts the effective vibration stroke and mass distribution of the oscillator, preventing them from meeting design expectations. This leads to a decline in the core vibration performance of the linear motor, such as vibration amplitude and frequency stability, making it difficult to meet the demands of consumer electronics products for superior vibration feedback.

[0005] Therefore, it is necessary to provide a new linear motor to solve the above problems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a linear motor with better vibration performance.

[0007] To solve the above-mentioned technical problems, the present invention provides a linear motor, which includes a housing having a receiving space, an oscillator assembly received in the receiving space, an elastic member elastically suspending the oscillator assembly in the housing, and a stator assembly fixed in the housing and driving the oscillator assembly to vibrate.

[0008] The stator assembly includes an iron core fixed to the housing, a coil wound around and fixed to the iron core, and a conductive element fixed to the housing; the coil is provided with an inlet terminal and an outlet terminal; the iron core includes two fixed ends that are spaced apart from each other along the vibration direction of the oscillator assembly and fixed to the housing, and a connecting portion that connects the two fixed ends and extends along the vibration direction; the coil is wound around the connecting portion; one of the fixed ends of the iron core has a wire groove; the inlet terminal and the outlet terminal are both electrically connected to the conductive element through the wire groove;

[0009] The oscillator assembly includes a mass block and magnets mounted on the mass block. The mass block has a through hole. The magnets include two first magnets housed in the through hole and spaced apart from each other along a first direction perpendicular to the vibration direction. The iron core is inserted into the through hole and disposed between the two first magnets. The projections of the input terminal and the output terminal onto the two first magnets in a second direction perpendicular to both the vibration direction and the first direction do not coincide.

[0010] Preferably, the housing includes an upper cover and a lower cover that covers the upper cover and together with the upper cover forms the receiving space. The iron core and the conductive element are respectively fixed to the lower cover. The fixed end includes a bottom wall fixed to the lower cover and two side walls that bend and extend from the bottom wall and are arranged opposite each other along the first direction. The wire passage includes two, and the two wire passages are respectively disposed at the junction of the bottom wall and the two side walls. The inlet terminal and the outlet terminal extend to the conductive element through the two wire passages respectively.

[0011] Preferably, the housing includes an upper cover and a lower cover that covers the upper cover and together with the upper cover forms the receiving space. The iron core and the conductive element are respectively fixed to the lower cover. The fixed end includes a bottom wall fixed to the lower cover and two side walls that bend and extend from the bottom wall and are arranged opposite each other along the first direction. The wire passage includes two, and the two wire passages are respectively formed by the two side wall recesses. The inlet terminal and the outlet terminal extend to the conductive element through the two wire passages respectively.

[0012] Preferably, the housing includes an upper cover and a lower cover that covers the upper cover and together with the upper cover forms the receiving space. The iron core and the conductive element are respectively fixed to the lower cover. The fixed end includes a bottom wall fixed to the lower cover and two side walls that bend and extend from the bottom wall and are arranged opposite to each other along the first direction. The wire passage groove is one and is formed by the recess of the bottom wall. The inlet terminal and the outlet terminal both extend to the conductive element through the wire passage groove.

[0013] Preferably, the conductive element is located on the side of the iron core where the wire groove is formed and is arranged at intervals from the iron core along the vibration direction, and the projections of the conductive element and the two first magnets in the second direction do not coincide.

[0014] Preferably, the mass block includes two first mounting grooves formed by two first hole walls that are relatively spaced apart along the first direction and are respectively recessed along the first direction; the two first magnets are respectively housed and fixed in the two first mounting grooves.

[0015] Preferably, the magnet further includes two second magnets housed within the through hole and spaced apart from each other along the vibration direction, the iron core is disposed between the two second magnets, and the projections of the input terminal and the output terminal onto the two second magnets in the second direction do not coincide.

[0016] Preferably, the mass block includes two second mounting grooves formed by two second hole walls that are relatively spaced apart from each other along the vibration direction; the two second magnets are respectively housed and fixed in the two second mounting grooves.

[0017] Preferably, the mass block further includes two third mounting grooves formed by the recesses of its two end walls, which are respectively arranged opposite to each other along the vibration direction. The linear motor further includes two damping structures sandwiched between the housing and the mass block. The two damping structures are respectively embedded in the two third mounting grooves, and the two second mounting grooves and the two third mounting grooves are all located on the same straight line parallel to the vibration direction.

[0018] Preferably, the linear motor further includes two limiting blocks, which are fixed to the housing and distributed on opposite sides of the mass block along the vibration direction.

[0019] Compared with related technologies, the linear motor of the present invention includes a housing with a receiving space, an oscillator assembly housed within the receiving space, an elastic element that elastically suspends the oscillator assembly within the housing, and a stator assembly fixed within the housing and driving the oscillator assembly to vibrate along a vibration direction; the stator assembly includes an iron core fixed to the housing, a coil wound around and fixed to the iron core, and a conductive element fixed to the housing; the coil is provided with an inlet terminal and an outlet terminal, the iron core includes two fixed ends arranged at intervals along the vibration direction and fixed to the housing, and a connecting portion connecting the two fixed ends and extending along the vibration direction; the coil... The iron core, wound around the connecting portion, has a wire groove at one of its fixed ends. Both the input and output terminals are electrically connected to the conductive element via the wire groove. The oscillator assembly includes a mass block and magnets mounted on the mass block. The mass block has a through hole. The magnets include two first magnets housed within the through hole and spaced apart relative to each other along a first direction perpendicular to the vibration direction. The iron core is inserted into the through hole and positioned between the two first magnets. The projections of the input and output terminals onto the two first magnets in a second direction perpendicular to both the vibration direction and the first direction do not coincide. Compared to existing structures, this invention reduces the impact on the oscillator assembly by adjusting the position and direction of the coil wires, which is beneficial for setting a larger volume oscillator assembly in the linear motor and increasing the height of the magnets, thereby improving the utilization rate of the internal space of the linear motor and optimizing the vibration effect. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0021] Figure 1 This is a schematic diagram of the structure of a linear motor provided in an embodiment of the present invention;

[0022] Figure 2 An exploded view of the linear motor provided in an embodiment of the present invention;

[0023] Figure 3 For along Figure 1 Sectional view of line AA in the middle;

[0024] Figure 4 This is a schematic diagram of the location of the wire groove provided in Embodiment 1 of the present invention;

[0025] Figure 5This is a schematic diagram of the location of the wire groove provided in Embodiment 2 of the present invention;

[0026] Figure 6 This is a schematic diagram of the location of the wire groove provided in Embodiment 3 of the present invention;

[0027] Figure 7 An exploded view of another linear motor provided in an embodiment of the present invention;

[0028] Figure 8 For along Figure 1 Another cross-sectional view of line AA in the middle. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1

[0031] Please see Figure 1-4 As shown, Embodiment 1 of the present invention provides a linear motor 100, which includes a housing 1 having a receiving space, an oscillator assembly 2 received in the receiving space, an elastic member 4 elastically suspending the oscillator assembly 2 in the housing 1, and a stator assembly 3 fixed in the housing 1 and driving the oscillator assembly 2 to vibrate along the vibration direction.

[0032] The stator assembly 3 includes an iron core 32 fixed to the housing 1, a coil 31 wound around and fixed to the iron core 32, and a conductive element 33 fixed to the housing 1. The coil 31 is provided with an inlet terminal 311 and an outlet terminal 312. The iron core 32 includes two fixed ends 321 that are spaced apart from each other along the vibration direction of the oscillator assembly 2 and fixed to the housing 1, and a connecting portion 322 that connects the two fixed ends 321 and extends along the vibration direction. The coil 31 is wound around the connecting portion 322. One of the fixed ends 321 of the iron core 32 has a wire groove 3211. The inlet terminal 311 and the outlet terminal 312 are both electrically connected to the conductive element 33 through the wire groove 3211.

[0033] The oscillator assembly 2 includes a mass block 21 and magnets 22 mounted on the mass block 21. The mass block 21 has a through hole 211 extending through it. The magnets 22 include two first magnets 221 that are housed in the through hole 211 and are spaced apart from each other along a first direction perpendicular to the vibration direction. The iron core 32 is inserted into the through hole 211 and is disposed between the two first magnets 221. The projections of the input terminal 311 and the output terminal 312 onto the two first magnets 221 in a second direction perpendicular to both the vibration direction and the first direction do not coincide.

[0034] In embodiments of the present invention, such as Figure 2 As shown, the extension direction of the connecting portion 322 of the iron core 32 is parallel to the vibration direction (x-axis direction) of the oscillator assembly 2, the first direction being the y-axis direction and the second direction being the z-axis direction. In the above structure, the terminals of the coil 31 are all located on one side of the iron core 32. Compared with the structure where the terminals are located on opposite sides of the iron core 32, the space required for terminal wiring is reduced. This space can be used to increase the volume and weight of the oscillator assembly 2 to optimize the vibration effect. Furthermore, since the terminals of the coil 31 are all located on one side of the iron core 32, it can prevent the magnet 22 from contacting the terminals of the coil 31 when the oscillator assembly 2 vibrates, thereby ensuring the stability of the linear motor 100.

[0035] like Figure 4 As shown, in Embodiment 1 of the present invention, the housing 1 includes an upper cover 11 and a lower cover 12 that covers the upper cover 11 and together with the upper cover 11 forms the receiving space. The iron core 32 and the conductive element 33 are respectively fixed to the lower cover 12. The fixed end 321 includes a bottom wall 3212 fixed to the lower cover 12 and two side walls 3213 that bend and extend from the bottom wall 3212 and are arranged opposite to each other along the first direction. There are two wire passage grooves 3211a. The two wire passage grooves 3211a are respectively disposed at the junction of the bottom wall 3212 and the two side walls 3213. The inlet terminal 311 and the outlet terminal 312 extend to the conductive element 33 through the two wire passage grooves 3211a.

[0036] Fixing the stator assembly 3 and the oscillator assembly 2 to the lower cover 12 and the upper cover 11 respectively facilitates easy component replacement and optimizes the assembly process.

[0037] Specifically, in this embodiment of the invention, the conductive element 33 is located on the side of the iron core 32 where the wire groove 3211a is provided and is arranged at intervals with the iron core 32 along the vibration direction. The projections of the conductive element 33 and the two first magnets 221 in the second direction do not coincide. The contact points between the coil terminals and the conductive element 33 require a certain amount of space. Therefore, by designing that the projections of the conductive element 33 and the two first magnets 221 do not coincide in the second direction, the space required for the terminal wiring of the coil 31 can be reduced. This optimized space can be used to increase the volume and weight of the oscillator assembly 2, thereby further optimizing the vibration effect.

[0038] Furthermore, the mass block 21 includes two first mounting grooves 212 formed by two first hole walls that are relatively spaced apart along the first direction of the through hole 211 and are respectively recessed along the first direction; the two first magnets 221 are respectively housed and fixed in the two first mounting grooves 212. By slotting the first hole wall and installing the first magnets 221, the distance between the iron core 32 and the mass block 21 can be controlled, which is beneficial to ensuring the working stability of the linear motor 100. At the same time, the integrated design of the magnets 22 and the mass block 21 can also ensure the vibration balance of the oscillator assembly 2, thereby optimizing the vibration effect.

[0039] Preferably, the mass block 21 further includes two third mounting grooves 214 formed by the recesses of its two end walls, which are respectively recessed along the vibration direction. The linear motor 100 also includes two damping structures 5 sandwiched between the housing 1 and the mass block 21, with the two damping structures 5 respectively embedded in the two third mounting grooves 214. The mass block 21 itself serves as a weight-adding structure, increasing the mass and volume of the oscillator assembly 2. The damping structures 5 provide an auxiliary effect on the repeated vibration of the oscillator assembly 2, helping to maintain the continuity of vibration and improving the user experience.

[0040] The linear motor 100 also includes two limiting blocks 6, which are fixed to the housing 1 and distributed on opposite sides of the mass block 21 along the vibration direction. The limiting blocks 6 limit the vibration degree of the oscillator assembly 2 and ensure vibration balance.

[0041] Example 2

[0042] like Figures 4 to 6 As shown, in this embodiment of the invention, the position of the through groove 3211 can be implemented in a variety of ways.

[0043] In Example 2, as Figure 5As shown, the wire passage groove 3211b includes two, and the two wire passage grooves 3211b are respectively formed by the two sidewalls 3213. The inlet terminal 311 and the outlet terminal 312 extend to the conductive member 33 through the two wire passage grooves 3211b respectively.

[0044] Example 3

[0045] like Figure 6 As shown, in Embodiment 3, the wire channel 3211c is a single channel formed by the recess of the bottom wall 3212, and both the inlet terminal 311 and the outlet terminal 312 extend to the conductive element 33 via the wire channel 3211c.

[0046] The design of the wire groove 3211 in Embodiments 1, 2, and 3 is only related to the shape of the fixed end 321 of the iron core 32 itself. Apart from this, the other structures in the stator assembly 3 are the same, and the installation position of the conductive element 33 is also the same. All different implementations ensure that the two terminals of the coil 31 are located on the same side of the iron core 32. Compared with a structure where the terminals are located on opposite sides of the iron core 32, the volume of the housing space occupied by the terminal wiring can be reduced.

[0047] Example 4

[0048] Please refer to Figure 7 , 8 Based on the original design with only the first magnet 221, in embodiment four, the magnet 22 further includes two second magnets 222 housed within the through hole 211 and spaced apart relative to each other along the vibration direction. The iron core 32 is disposed between the two second magnets 222. The projections of the inlet terminal 311 and the outlet terminal 312 onto the two second magnets 222 in the second direction do not coincide. The mass block 21 includes two second mounting grooves 213 formed by the recesses of the two second hole walls of the through hole 211, which are spaced apart relative to each other along the vibration direction. The two second magnets 222 are respectively housed and fixed within the two second mounting grooves 213.

[0049] In Embodiment 4, the two second mounting slots 213 and the two third mounting slots 214 are all located on the same straight line parallel to the vibration direction.

[0050] In terms of appearance, the linear motor 100 of Embodiment 4 is similar to... Figure 1 The shapes shown are the same, the difference being that the oscillator assembly 2 has two more second magnets 222, so that the four magnet structures forming the oscillator assembly 2 in the linear motor 100 surround the coil of the stator assembly. It can be understood that the design of multiple magnets is beneficial to increase the magnetic field strength, thereby improving the vibration performance of the linear motor 100.

[0051] Based on this, the shape of the conductive element 33 can also be changed to a certain extent. The shape of the conductive element 33 can be made at an angle between the first magnet 221 and the second magnet 222, so that the projections of the first magnet 221, the second magnet 222, and the conductive element 33 in the second direction do not overlap, thereby reducing unnecessary displacement of the magnet structure and ensuring the magnet volume as much as possible.

[0052] Compared with related technologies, the linear motor of the present invention includes a housing with a receiving space, an oscillator assembly housed within the receiving space, an elastic element that elastically suspends the oscillator assembly within the housing, and a stator assembly fixed within the housing and driving the oscillator assembly to vibrate along a vibration direction; the stator assembly includes an iron core fixed to the housing, a coil wound around and fixed to the iron core, and a conductive element fixed to the housing; the coil is provided with an inlet terminal and an outlet terminal, the iron core includes two fixed ends arranged at intervals along the vibration direction and fixed to the housing, and a connecting portion connecting the two fixed ends and extending along the vibration direction; the coil... The iron core, wound around the connecting portion, has a wire groove at one of its fixed ends. Both the input and output terminals are electrically connected to the conductive element via the wire groove. The oscillator assembly includes a mass block and magnets mounted on the mass block. The mass block has a through hole. The magnets include two first magnets housed within the through hole and spaced apart relative to each other along a first direction perpendicular to the vibration direction. The iron core is inserted into the through hole and positioned between the two first magnets. The projections of the input and output terminals onto the two first magnets in a second direction perpendicular to both the vibration direction and the first direction do not coincide. Compared to existing structures, this invention reduces the impact on the oscillator assembly by adjusting the position and direction of the coil wires, which is beneficial for setting a larger volume oscillator assembly in the linear motor and increasing the height of the magnets, thereby improving the utilization rate of the internal space of the linear motor and optimizing the vibration effect.

[0053] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A linear motor comprising a housing having a receiving space, an oscillator assembly received within the receiving space, an elastic member elastically suspending the oscillator assembly within the housing, and a stator assembly fixed within the housing and driving the oscillator assembly to vibrate; characterized in that, The stator assembly includes an iron core fixed to the housing, a coil wound around and fixed to the iron core, and a conductive element fixed to the housing; the coil is provided with an inlet terminal and an outlet terminal; the iron core includes two fixed ends that are spaced apart from each other along the vibration direction of the oscillator assembly and fixed to the housing, and a connecting portion that connects the two fixed ends and extends along the vibration direction; the coil is wound around the connecting portion; one of the fixed ends of the iron core has a wire groove; the inlet terminal and the outlet terminal are both electrically connected to the conductive element through the wire groove; The oscillator assembly includes a mass block and magnets mounted on the mass block. The mass block has a through hole. The magnets include two first magnets housed in the through hole and spaced apart from each other along a first direction perpendicular to the vibration direction. The iron core is inserted into the through hole and disposed between the two first magnets. The projections of the input terminal and the output terminal onto the two first magnets in a second direction perpendicular to both the vibration direction and the first direction do not coincide.

2. The linear motor according to claim 1, characterized in that, The housing includes an upper cover and a lower cover that covers the upper cover and together with the upper cover forms the receiving space. The iron core and the conductive element are respectively fixed to the lower cover. The fixed end includes a bottom wall fixed to the lower cover and two side walls that bend and extend from the bottom wall and are arranged opposite each other along the first direction. There are two wire passages, which are respectively disposed at the junction of the bottom wall and the two side walls. The inlet terminal and the outlet terminal extend to the conductive element through the two wire passages.

3. The linear motor according to claim 1, characterized in that, The housing includes an upper cover and a lower cover that covers the upper cover and together with the upper cover forms the receiving space. The iron core and the conductive element are respectively fixed to the lower cover. The fixed end includes a bottom wall fixed to the lower cover and two side walls that bend and extend from the bottom wall and are arranged opposite to each other along the first direction. The wire passage includes two, and the two wire passages are respectively formed by the two side wall recesses. The inlet terminal and the outlet terminal extend to the conductive element through the two wire passages respectively.

4. The linear motor according to claim 1, characterized in that, The housing includes an upper cover and a lower cover that covers the upper cover and together with the upper cover forms the receiving space. The iron core and the conductive element are respectively fixed to the lower cover. The fixed end includes a bottom wall fixed to the lower cover and two side walls that bend and extend from the bottom wall and are arranged opposite to each other along the first direction. The wire passage groove is one and is formed by the recess of the bottom wall. The inlet terminal and the outlet terminal both extend to the conductive element through the wire passage groove.

5. The linear motor according to any one of claims 2-4, characterized in that, The conductive element is located on the side of the iron core where the wire groove is opened and is arranged at intervals with the iron core along the vibration direction. The projections of the conductive element and the two first magnets in the second direction do not coincide.

6. The linear motor according to claim 1, characterized in that, The mass block includes two first mounting grooves formed by two first hole walls that are relatively spaced apart along the first direction and are respectively recessed along the first direction; the two first magnets are respectively housed and fixed in the two first mounting grooves.

7. The linear motor according to claim 1, characterized in that, The magnet also includes two second magnets housed within the through hole and spaced apart from each other along the vibration direction. The iron core is disposed between the two second magnets. The projections of the input terminal and the output terminal onto the two second magnets in the second direction do not coincide.

8. The linear motor according to claim 7, characterized in that, The mass block includes two second mounting grooves formed by two second hole walls that are relatively spaced apart from each other along the vibration direction; the two second magnets are respectively housed and fixed in the two second mounting grooves.

9. The linear motor according to claim 8, characterized in that, The mass block also includes two third mounting grooves formed by the recesses of its two end walls, which are respectively arranged opposite each other along the vibration direction. The linear motor also includes two damping structures sandwiched between the housing and the mass block. The two damping structures are respectively embedded in the two third mounting grooves, and the two second mounting grooves and the two third mounting grooves are all located on the same straight line parallel to the vibration direction.

10. The linear motor according to claim 1, characterized in that, The linear motor also includes two limiting blocks, which are fixed to the housing and distributed on opposite sides of the mass block along the vibration direction.

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