Linear motor

Abstract

The application discloses a linear motor, which comprises a shell, a vibrator assembly, a spring support arranged on the vibrator assembly, a damping piece arranged between the side wall of one end of the spring support and the vibrator assembly, a stator assembly, and a spring piece. One end of the spring piece is connected to the other end of the spring support, the outer side of one end of the spring piece is connected to the shell, and the other end of the spring piece is connected to the vibrator assembly. The spring support and the damping piece are matched to provide double damping for the product, the spring piece can provide the rebound force for the vibrator assembly, the required damping force and the mass of the mass block of the product are ensured, and the use reliability and stability of the product are improved. The spring support can also play the role of elastic limiting, and the spring piece and the shell can be better protected.

Description

Technical Field

[0001] This invention belongs to the field of electronic product technology, and in particular relates to a linear motor. Background Technology

[0002] Currently, traditional X-axis motor structures have the following two problems in use:

[0003] 1. In order to ensure the damping force required during product vibration, the mass of the mass block is usually sacrificed, resulting in lower vibration and poor performance.

[0004] 2. In order to ensure the performance of the product, the amplitude needs to be increased, which will greatly increase the risk of reliability failure.

[0005] Meanwhile, in traditional X-axis motors, there is a rigid limiting block between the mass block and the elastic structure. During operation, when the mass block reaches the limit position, it will collide with the inner wall of the housing, causing damage to the housing and the elastic structure, which in turn leads to a significant reduction in service life. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a linear motor that achieves dual damping, thereby ensuring both the required damping force for the product and the mass of the mass block, reducing amplitude, and improving product reliability.

[0007] The technical solution provided by the embodiments of the present invention is: a linear motor, including a housing;

[0008] An oscillator assembly is provided with an elastic support, and a damping element is provided between the side wall of one end of the elastic support and the oscillator assembly;

[0009] A stator assembly, an oscillator assembly, and the stator assembly are located within the housing, the stator assembly and the oscillator assembly interacting to drive the oscillator assembly to move;

[0010] A spring sheet, one inner end of which is connected to the other end of the elastic support, one outer end of which is connected to the housing, and the other end of which is connected to the oscillator assembly.

[0011] As an improvement, the oscillator assembly includes a mass block, and a suspension gap is provided between the other end of the elastic support and the mass block; one end of the spring plate is connected to the suspension end of the elastic support, and the other end is connected to the mass block.

[0012] As a further improvement, the elastic support is provided in two parts, which are distributed at one of the two corners of the mass block.

[0013] As a further improvement, the spring is U-shaped, and a buffer space is provided between the elastic bracket on the side where the damping element is arranged and the spring.

[0014] As a further improvement, the damping element is foam, and both sides of the foam are respectively bonded to the mass block and the elastic support.

[0015] As a further improvement, the elastic support is configured as an L-shape, and the mass block at the position corresponding to the elastic support has an L-shaped notch.

[0016] As a further improvement, a stop block is provided on the outer wall of the spring piece at the connection position with the mass block.

[0017] As a further improvement, the oscillator assembly also includes a central hole located in the central region of the mass block, and two magnets are arranged in the central hole;

[0018] It also includes a magnetic plate covering the central hole and attached to the top of the mass block, wherein both magnets are attached to the magnetic plate and the magnetic poles of the two magnets are different at the attachment positions.

[0019] As a further improvement, the stator assembly includes a flexible circuit board located directly below the central hole and bonded to the housing. A coil is bonded to the flexible circuit board, and both the coil and the flexible circuit board have core holes. An iron core bonded to the housing is arranged inside the core holes.

[0020] As a further improvement, the mass blocks located above and below the magnet are provided with receiving grooves that communicate with the central hole, and the magnetic plate and the coil are respectively arranged in one of the receiving grooves.

[0021] By adopting the technical solution described above, the beneficial effects of the linear motor provided by the embodiments of the present invention are as follows:

[0022] Because the linear motor includes a housing; an oscillator assembly with an elastic support on the oscillator assembly, and a damping element between the side wall of one end of the elastic support and the oscillator assembly; a stator assembly, with the oscillator assembly and stator assembly located inside the housing; and a spring, with one end of the spring connected to the other end of the elastic support, one end of the spring connected to the housing, and the other end of the spring connected to the oscillator assembly, the linear motor, during use, causes the mass block in the oscillator assembly to reciprocate through the cooperation of the stator assembly and the oscillator assembly. Specifically, the cooperation between the coil in the stator assembly and the magnet in the oscillator assembly generates a Lorentz force band. The moving mass block reciprocates. During this reciprocating motion, the elastic support and damping components work together to provide dual damping for the product (firstly, the damping components provide damping, and secondly, the elastic support itself is an elastic body with built-in damping). At the same time, the spring plate provides a rebound force to the oscillator assembly, ensuring the required damping force and mass block mass, thus improving the product's reliability and stability. In addition, the elastic support acts as an elastic limiter, which, compared to traditional rigid limiters, better protects the spring plate and housing, effectively ensuring the service life of the linear motor. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0025] Figure 2 yes Figure 1 Top view (excluding the housing);

[0026] Figure 3 yes Figure 1 Exploded view;

[0027] In the diagram, 1-plate-type lower shell; 2-box-type upper shell; 3-mass block; 301-notch; 302-center hole; 303-receiving groove; 304-protrusion; 4-oscillator assembly; 401-magnet; 402-magnetic plate; 5-stator assembly; 501-flexible circuit board; 502-coil; 503-core hole; 504-core; 6-elastic bracket; 7-damping component; 8-suspension spacing; 9-spring; 901-avoidance part; 10-buffer space; 11-stop block. Detailed Implementation

[0028] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0029] like Figures 1 to 3 As shown, a linear motor includes a housing, an oscillator assembly 4, a stator assembly 5, and a spring 9. The housing includes a lower plate-type shell 1 and an upper box-type shell 2, which together form the housing. The oscillator assembly 4 and the stator assembly 5 are located inside the housing. The stator assembly 5 interacts with the oscillator assembly 4 to drive the oscillator assembly 4 to move. An elastic support 6 is provided on the oscillator assembly 4, and a damping element 7 is provided between the side wall of one end of the elastic support 6 and the oscillator assembly 4. The inner side of one end of the spring 9 is connected to the other end of the elastic support 6, the outer side of one end of the spring 9 is connected to the housing, and the other end of the spring 9 is connected to the oscillator assembly 4. The elastic support 6 itself is elastic and has a damping effect. Combined with the damping effect provided by the damping element 7, it can provide a double damping effect for the product. Moreover, the elastic support 6 can also play a role in elastic limiting, better protecting the spring 9 and the housing.

[0030] Specifically, the upper shell 2 contains an oscillator assembly 4, which includes a mass block 3. A stator assembly 5 is located on the lower shell 1 below the central area of ​​the mass block 3. The stator assembly 5 includes a coil 502. The oscillator assembly 4 also includes a magnet 401 fixed to the mass block 3. When the coil 502 is energized, it interacts with the magnet 401 to drive the oscillator assembly 4 to move. The mass block 3 has an L-shaped elastic support 6. A damping element 7 is provided between the side wall of one end of the elastic support 6 and the mass block 3. A suspension gap 8 is provided between the other end of the elastic support 6 and the mass block 3. Spring pieces 9 are disposed at both ends of the mass block 3 and are U-shaped. The inner side of one end of the spring piece 9 is connected to the side wall of the other end of the elastic support 3 by welding. The outer side of one end of the spring piece 9 is connected to the inner wall of the upper shell 2 by welding.

[0031] Preferably, a buffer space 10 is provided between the side wall of the elastic support 6 on the side where the damping element 7 is arranged and the spring piece 9. Thus, during the reciprocating movement of the mass block 3, part of the force acting on the elastic support 6 is released through the buffer space 10, which is beneficial to the protection of the spring piece 9. An L-shaped notch 301 is provided on the mass block 3 at the position corresponding to the elastic support 6, so that the elastic support 6 can be arranged at the position of the notch 301, so that the elastic support 6 does not occupy the original space, effectively improving the space utilization rate inside the shell.

[0032] In this design, two elastic supports 6 are provided and distributed at one pair of corners of the mass block 3. The inner side of one end of the spring piece 9 is connected to the side wall of the suspended elastic support 6 by welding, and the other end of the spring piece 9 is connected to the mass block 3 by welding. The damping element 7 is foam, and the two sides of the foam are respectively bonded to the mass block 3 and the elastic support 6. Thus, the use of foam can not only reduce the cost of use, but also facilitate the installation and provide good damping effect.

[0033] A stop block 11 is welded to the outer wall of the spring piece 9 at the connection position with the mass block 3, thereby protecting the spring piece 9 through the transition of the stop block 11; in order to prevent the stop block 11 from protruding too much, a straight notch (2 and 2 in the figure) is provided on the mass block 3 at the connection position with the spring piece 9. Figure 3 (It is shown in the figure, but not in the form of labels).

[0034] The oscillator assembly 4 also includes a central hole 302 located in the central region of the mass block 3, in which two magnets 401 are arranged; it also includes a magnetic guide plate 402 covering the central hole 302 and attached to the top of the mass block 3, wherein the two magnets 401 are both attached to the magnetic guide plate 402, and the magnetic poles of the two magnets 401 at the attachment positions are different (i.e., one of the two magnets 401 at the attachment positions to the magnetic guide plate 402 is the S pole and the other is the N pole).

[0035] The stator assembly 5 includes a flexible circuit board 501 located directly below the central hole 302 and bonded to the plate-type lower shell 1. A coil 502 is bonded to the flexible circuit board 501. Both the coil 502 and the flexible circuit board 501 are provided with iron core holes 503. An iron core 504 bonded to the plate-type lower shell 1 is arranged in the iron core hole 503.

[0036] In this design, the mass block 3 located above and below the magnet 401 has receiving grooves 303 communicating with the central hole 302. The magnetic plate 402 and the coil 502 are respectively arranged in one receiving groove 303. Thus, through the cooperation of the magnetic plate 402 and the coil 502 with the receiving groove 303, the overall thickness of the linear motor can be effectively reduced, resulting in a compact arrangement and facilitating the miniaturization of the product. Both ends of the mass block 3 have protrusions 304, and the spring piece 9 at the corresponding position of the protrusions 304 has a clearance part 901. Thus, through the cooperation of the clearance part 901 and the protrusions 304, not only is the normal reciprocating movement of the mass block 3 during operation guaranteed, but the compactness of the arrangement is further improved.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A linear motor, characterized in that, Includes the casing; An oscillator assembly is provided with an elastic support, and a damping element is provided between the side wall of one end of the elastic support and the oscillator assembly; A stator assembly, an oscillator assembly, and the stator assembly are located within the housing, the stator assembly and the oscillator assembly interacting to drive the oscillator assembly to move; A spring sheet, one inner end of which is connected to the other end of the elastic support, one outer end of which is connected to the housing, and the other end of which is connected to the oscillator assembly; The oscillator assembly includes a mass block, and a suspension gap is provided between the other end of the elastic support and the mass block; one end of the spring plate is connected to the suspension end of the elastic support, and the other end is connected to the mass block.

2. The linear motor according to claim 1, characterized in that, Two elastic supports are provided and distributed at one of the two corners of the mass block.

3. The linear motor according to claim 1, characterized in that, The spring is U-shaped, and a buffer space is provided between the elastic bracket on the side where the damping element is located and the spring.

4. The linear motor according to claim 1, characterized in that, The damping element is foam, and both sides of the foam are respectively bonded to the mass block and the elastic support.

5. The linear motor according to claim 2, characterized in that, The elastic support is L-shaped, and the mass block at the position corresponding to the elastic support has an L-shaped notch.

6. The linear motor according to claim 1, characterized in that, A stop is provided on the outer wall of the spring piece at the location where it connects with the mass block.

7. The linear motor according to any one of claims 1 to 6, characterized in that, The oscillator assembly also includes a central hole located in the central region of the mass block, and two magnets are arranged inside the central hole; It also includes a magnetic plate covering the central hole and attached to the top of the mass block, wherein both magnets are attached to the magnetic plate and the magnetic poles of the two magnets are different at the attachment positions.

8. The linear motor according to claim 7, characterized in that, The stator assembly includes a flexible circuit board located directly below the central hole and bonded to the housing. A coil is bonded to the flexible circuit board. Both the coil and the flexible circuit board have iron core holes, and an iron core bonded to the housing is arranged inside the iron core holes.

9. The linear motor according to claim 8, characterized in that, The mass blocks located above and below the magnet have receiving grooves that communicate with the central hole, and the magnetic plate and the coil are respectively arranged in one of the receiving grooves.

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