A linear motor

Abstract

The present invention discloses a linear motor, belonging to the technical field of motors, comprising a housing with a receiving space, a stator and a vibrator received in the receiving space, the stator being fixedly connected to the housing, the vibrator being connected to the housing through an elastic component and suspended in the receiving space, the stator comprising a voice coil and a copper sheet, the vibrator comprising a mass block having a first blind hole and a second blind hole and a first group of magnetic steels and a second group of magnetic steels, the mass block being located between the copper sheet and the voice coil, the first blind hole and the second blind hole being spaced apart, the first blind hole being located between the copper sheet and the second blind hole, the first group of magnetic steels being arranged in the first blind hole, the second group of magnetic steels being arranged in the second blind hole, and the voice coil driving the vibrator to vibrate along the X-axis direction. The present invention achieves the technical effect of improving the space utilization rate of the linear motor and improving the performance.

Description

Technical Field

[0001] The invention belongs to the technical field of motors, and in particular relates to a linear motor. Background Art

[0002] A linear motor is a device that converts electrical energy directly into mechanical energy for linear motion. Linear motors are widely used in various devices that require linear motion.

[0003] At present, in the linear motor technology, the linear motor usually includes a shell with a receiving space, a vibration unit and a copper sheet located in the receiving space, an elastic member that fixes and suspends the vibration unit in the receiving space, and a coil assembly fixed to the shell. The vibration unit includes a mass block, a pole core and a magnet. The coil assembly includes a coil and an iron core, wherein the pole core is arranged between the magnet and the copper sheet, and the magnetic field generated by the coil interacts with the magnetic field generated by the vibration unit to drive the vibration unit to perform reciprocating linear motion. However, after the pole core is arranged between the magnet and the copper sheet, there will be a large gap between the magnet and the copper sheet, which requires a large accommodation space, which is not conducive to the miniaturization and integration of the linear motor. At the same time, it limits the weight of the lifting mass block and reduces the vibration performance and response speed of the motor.

[0004] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is the technical problem that the linear motor has low space utilization and poor performance.

[0006] To solve the above technical problems, the present invention provides a linear motor, comprising: a shell having a receiving space, a stator and a vibrator received in the receiving space, the stator being fixedly connected to the shell, the vibrator being connected to the shell through an elastic component and suspended in the receiving space, the stator comprising a voice coil and a copper sheet, the vibrator comprising a mass block having a first blind hole and a second blind hole and a first group of magnetic steels and a second group of magnetic steels, the mass block being located between the copper sheet and the voice coil, the first blind hole and the second blind hole being distributed at intervals, the first blind hole being located between the copper sheet and the second blind hole, the first group of magnetic steels being arranged in the first blind hole, the second group of magnetic steels being arranged in the second blind hole, and the voice coil driving the vibrator to vibrate along the X-axis direction.

[0007] Optionally, the first group of magnetic steels includes one or more magnetic steel units; the second group of magnetic steels includes two first magnetic steels and a second magnetic steel disposed between the two first magnetic steels.

[0008] Optionally, the magnetic steel unit includes a third magnetic steel, and the third magnetic steel has two magnetized regions distributed along the X-axis direction, each of the magnetized regions is magnetized along the Y-axis direction, and the magnetization directions of the two magnetized regions are opposite.

[0009] Optionally, the magnetic steel unit includes two fourth magnetic steels, and the two fourth magnetic steels are magnetized along the Y-axis direction and in opposite directions.

[0010] Optionally, the magnetic steel unit includes five or seven fifth magnetic steels.

[0011] Optionally, the magnetic steel unit includes two sixth magnetic steels and a seventh magnetic steel arranged between the two sixth magnetic steels, the two sixth magnetic steels are magnetized along the Y-axis direction and in opposite magnetization directions, the seventh magnetic steel is magnetized along the X-axis direction, the two first magnetic steels are magnetized along the Y-axis direction and in opposite magnetization directions, the second magnetic steel is magnetized along the X-axis direction, the magnetization direction of each of the first magnetic steels is the same as the magnetization direction of the corresponding sixth magnetic steel, and the magnetization direction of the second magnetic steel is opposite to the magnetization direction of the seventh magnetic steel.

[0012] Optionally, the first magnetic steel and the sixth magnetic steel have different sizes, and the second magnetic steel and the seventh magnetic steel have different sizes.

[0013] Optionally, the magnetic steel unit and the first magnetic steel are cross-distributed, and the first magnetic steel and the second magnetic steel are distributed in parallel.

[0014] Optionally, the linear motor further comprises: a pole core, wherein the pole core is disposed between the first group of magnetic steels and the second group of magnetic steels, and the pole core is connected to the mass block.

[0015] Optionally, two ends of the pole core are respectively welded to the mass block, or two ends of the pole core are respectively glued to the mass block; the two ends of the pole core are at least partially projected on the mass block in a direction close to the voice coil.

[0016] Beneficial effects:

[0017] The present invention provides a linear motor, wherein a stator and a vibrator are contained in a receiving space of a shell, the stator is fixedly connected to the shell, the vibrator is connected to the shell through an elastic component and suspended in the receiving space, the stator comprises a voice coil and a copper sheet, the vibrator comprises a mass block having a first blind hole and a second blind hole and a first group of magnetic steels and a second group of magnetic steels, the mass block is located between the copper sheet and the voice coil, the first blind hole and the second blind hole of the mass block are arranged at intervals, the first blind hole is located between the copper sheet and the second blind hole, the first group of magnetic steels are arranged in the first blind hole, and the second group of magnetic steels are arranged in the second blind hole, and the voice coil drives the vibrator to vibrate along the direction of the X axis. In this way, the first group of magnetic steels and the second group of magnetic steels are respectively arranged in the first blind hole and the second blind hole, and the pole core is removed between the first group of magnetic steels and the copper sheet, which directly reduces the gap between the first group of magnetic steels and the copper sheet, and the required performance requirements can be met by using a smaller volume of the first group of magnetic steels and the second group of magnetic steels, and at the same time, the utilization rate of the magnetic field can be improved, the weight of the mass block can be increased, and the overall performance of the linear motor can be improved. Thus, the technical effect of improving the space utilization rate of the linear motor and improving the performance is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of a linear motor provided by an embodiment of the present invention.

[0020] Figure 2 A schematic diagram of the structure of a third magnetic steel in a linear motor provided in an embodiment of the present invention.

[0021] Figure 3 A schematic diagram of the structure of a fifth magnetic steel in a linear motor provided in an embodiment of the present invention.

[0022] Figure 4 A schematic structural diagram of a sixth magnetic steel and a seventh magnetic steel in a linear motor provided in an embodiment of the present invention.

[0023] Figure 5 A schematic structural diagram of a first magnetic steel and a second magnetic steel in a linear motor provided in an embodiment of the present invention.

[0024] Figure 6 A schematic diagram of the structure of a pole core in a linear motor provided in an embodiment of the present invention.

[0025] Figure 7A schematic structural diagram of a housing in a linear motor provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0027] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0028] In the embodiments of the present application, at least one refers to one or more; multiple refers to two or more. In the description of the present application, the words "first", "second", "third", etc. are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order.

[0029] References to "one embodiment" or "some embodiments" etc. described in this specification mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, in this specification, the terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. It should be noted that in the embodiments of the present application, "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0030] It should be pointed out that in the embodiments of the present invention, when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. At the same time, "connection" in the embodiments of the present application can also be understood as electrical connection, and the connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, A is connected to B, which can be either a direct connection between A and B or an indirect connection between A and B through one or more other electrical components. The terms "vertical", "horizontal", "left", "right" and similar expressions used in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the present invention.

[0031] A linear motor provided by an embodiment of the present invention is shown in Figure 1 The linear motor includes a housing 1, an elastic component 2, a stator 91 and a vibrator 92. The stator 91 is fixedly connected to the housing 1 and is located inside the receiving space 11 of the housing 1. The vibrator 92 is connected to the housing 1 through the elastic component 2 and is suspended inside the receiving space 11 of the housing 1. The stator 91 includes a copper sheet 3 and a voice coil 4. The vibrator 92 includes a mass block 5, a first group of magnetic steels 6 and a second group of magnetic steels 7. The elastic component 2, the copper sheet 3, the voice coil 4, the mass block 5, the first group of magnetic steels 6 and the second group of magnetic steels 7 are respectively arranged inside the receiving space 11. The mass block 5 is connected to the elastic component 2. The mass block 5 is located between the copper sheet 3 and the voice coil 4. The first blind hole 51 and the second blind hole 52 of the mass block 5 are spaced apart from each other. The first blind hole 51 is located between the copper sheet 3 and the second blind hole 52. The first group of magnetic steels 6 are arranged inside the first blind hole 51, and the second group of magnetic steels 7 are arranged inside the second blind hole 52. The vibrator 92 is driven to vibrate along the direction of the X-axis through the voice coil 4.

[0032] See also Figure 1 and Figure 7 The interior of the receiving space 11 in the housing 1 has a space for accommodating the elastic component 2, the copper sheet 3, the voice coil 4, the mass block 5, the first group of magnetic steels 6 and the second group of magnetic steels 7. The elastic component 2 is used to suspend the mass block 5 in the interior of the receiving space 11. The copper sheet 3 and the voice coil 4 are respectively located at the top and bottom of the mass block 5. The housing 1 may include an upper shell 13 and a bottom plate 12, and the upper shell 13 and the bottom plate 12 enclose the receiving space 11. In addition, the directions of the X-axis and the Y-axis in a linear motor provided in an embodiment of the present invention are as follows: Figure 2 shown.

[0033] The first blind hole 51 has a space for accommodating the first group of magnetic steels 6, and the second blind hole 52 has a space for accommodating the second group of magnetic steels 7. The first group of magnetic steels 6 is located between the second group of magnetic steels 7 and the copper sheet 3, and the second group of magnetic steels 7 is located between the first group of magnetic steels 6 and the voice coil 4. After the first group of magnetic steels 6 are placed in the first blind hole 51 and the second group of magnetic steels 7 are placed in the second blind hole 52, there is a small gap between the first group of magnetic steels 6 and the copper sheet 3 fixed to the upper shell 13, which can reduce the space occupied, which is conducive to the miniaturization and integration of the linear motor, and is also conducive to providing a larger installation space for the mass block and increasing the weight of the mass block.

[0034] In this embodiment, the stator 91 and the vibrator 92 are accommodated in the receiving space 11 of the shell 1, the stator 91 is fixedly connected to the shell 1, the vibrator 92 is connected to the shell 1 through the elastic component 2 and is suspended in the receiving space 11, the stator 91 includes a voice coil 4 and a copper sheet 3, the vibrator 92 includes a mass block 5 having a first blind hole 51 and a second blind hole 52 and a first group of magnetic steels 6 and a second group of magnetic steels 7, the elastic component 2, the copper sheet 3, the voice coil 4 and the mass block 5 are respectively arranged in the receiving space 11 of the shell 1, the mass block 5 is connected to the elastic component 2, the mass block 5 is located between the copper sheet 3 and the voice coil 4, the first blind holes 51 and the second blind holes 52 located in the mass block 5 are distributed at intervals, the first blind hole 51 is located between the copper sheet 3 and the second blind hole 52, the first group of magnetic steels 6 is arranged in the first blind hole 51, and the second group of magnetic steels 7 is arranged in the second blind hole 52, and the voice coil 4 drives the vibrator 92 to vibrate along the direction of the X-axis. In this way, the first group of magnetic steels 6 and the second group of magnetic steels 7 are respectively arranged in the first blind hole 51 and the second blind hole 52. Removing the pole core 8 between the first group of magnetic steels 6 and the copper sheet 3 will directly reduce the gap between the first group of magnetic steels 6 and the copper sheet 3. The smaller volume of the first group of magnetic steels 6 and the second group of magnetic steels 7 can meet the required performance requirements, and at the same time, the utilization rate of the magnetic field can be improved, the weight of the mass block 5 can be increased, and the overall performance of the linear motor can be improved. Thereby, the technical effect of improving the space utilization rate of the linear motor and improving the performance is achieved.

[0035] As an embodiment, the first group of magnetic steels 6 includes one magnetic steel unit 61 or multiple magnetic steel units 61, the second group of magnetic steels 7 includes two first magnetic steels 71 and one second magnetic steel 72, the second magnetic steel 72 is arranged between the two first magnetic steels 71, the first magnetic steels 71 and the corresponding magnetic steel units 61 have opposite magnetic properties, and the magnetic properties of one end of the second magnetic steel 72 close to one first magnetic steel 71 and the magnetic properties of the other end of the second magnetic steel 72 close to another first magnetic steel 71 are opposite. The second group of magnetic steels 7 can be located below the first group of magnetic steels 6, the magnetic steel units 61 can be arranged alternately in magnetic properties, and the magnetic steel units 61 and the two first magnetic steels 71 of the second group of magnetic steels 7 and the second magnetic steel 72 located in the middle form a complementary magnetic pole configuration.

[0036] In some embodiments, see Figure 2 The magnetic steel unit 61 includes a third magnetic steel 611. The third magnetic steel 611 has two magnetized regions distributed along the direction of the X-axis. Each magnetized region is magnetized along the direction of the Y-axis, and the magnetization directions of the two magnetized regions are opposite, so that the magnetism of one end of the third magnetic steel 611 close to one first magnetic steel 71 and the other end of the third magnetic steel 611 close to another first magnetic steel 71 are opposite, that is, multi-stage magnetization of a single magnetic steel is performed, such as when the magnetic pole of one end close to one first magnetic steel 71 is an N pole, the magnetic pole of one end close to another first magnetic steel 71 is an S pole, and the N pole and the S pole are both located on the same side; or when the magnetic pole of one end close to one first magnetic steel 71 is an S pole, the magnetic pole of one end close to another first magnetic steel 71 is an N pole.

[0037] In some embodiments, the magnetic steel unit 61 includes two fourth magnetic steels, which are magnetized along the direction of the Y axis in opposite directions, so that one of the two fourth magnetic steels is close to one end of a first magnetic steel 71, and its magnetism is opposite to that of the other fourth magnetic steel is close to one end of the other first magnetic steel 71, that is, the two magnetic steels are unipolarly magnetized, such as when the magnetic pole of one fourth magnetic steel close to one end of a first magnetic steel 71 is the N pole, the magnetic pole of the other fourth magnetic steel close to one end of the other first magnetic steel 71 is the S pole; or when the magnetic pole of one fourth magnetic steel close to one end of a first magnetic steel 71 is the S pole, the magnetic pole of the other fourth magnetic steel close to one end of the other first magnetic steel 71 is the N pole.

[0038] In some embodiments, see Figure 3, the magnetic steel unit 61 includes five fifth magnetic steels 613, or the magnetic steel unit 61 includes seven fifth magnetic steels 613. Among the five or seven fifth magnetic steels 613, two fifth magnetic steels 613 located on both sides of one fifth magnetic steel 613 are magnetized along the Y-axis direction, and the one fifth magnetic steel 613 is magnetized along the X-axis direction. For example, when the magnetic steel unit 61 includes five fifth magnetic steels 613, the five fifth magnetic steels 613 are, from left to right, the fifth magnetic steel 6131, the fifth magnetic steel 6132, the fifth magnetic steel 6133, the fifth magnetic steel 6134, the fifth magnetic steel 6135, the fifth magnetic steel 6136, the fifth magnetic steel 6137, the fifth magnetic steel 6138, the fifth magnetic steel 6139, the fifth magnetic steel 6140, the fifth magnetic steel 6141, the fifth magnetic steel 6142, the fifth magnetic steel 6143, the fifth magnetic steel 6144, the fifth magnetic steel 6145, the fifth magnetic steel 6146, the fifth magnetic steel 6147, the fifth magnetic steel 6148, the fifth magnetic steel 6149, the fifth magnetic steel 6150, the fifth magnetic steel 6151, the fifth magnetic steel 6152, the fifth magnetic steel 6153, the fifth magnetic steel 6154, the fifth magnetic steel 6155, the fifth magnetic steel 6156, the fifth magnetic steel 6157, the fifth magnetic steel 6158, the fifth magnetic steel 6159, the fifth magnetic steel 6160, the fifth magnetic steel 6161 The magnetic steel 6134 and the fifth magnetic steel 6135 respectively magnetize the fifth magnetic steel 6132 and the fifth magnetic steel 6134 along the direction of the X-axis, and the magnetization directions are opposite, so that the magnetic pole of the fifth magnetic steel 6132 at one end close to the fifth magnetic steel 6131 is the S pole, the magnetic pole of the fifth magnetic steel 6132 at the other end close to the fifth magnetic steel 6133 is the N pole, the magnetic pole of the fifth magnetic steel 6134 at one end close to the fifth magnetic steel 6133 is the N pole, and the magnetic pole of the fifth magnetic steel 6134 at the other end close to the fifth magnetic steel 6135 is the S pole. The fifth magnetic steel 6131, the fifth magnetic steel 6133 and the fifth magnetic steel 6135 are magnetized along the Y-axis direction respectively, and the magnetization directions are opposite, so that the magnetism of the fifth magnetic steel 6131, the fifth magnetic steel 6133 and the fifth magnetic steel 6135 close to the copper sheet 3 can be the same. For example, the magnetism of the fifth magnetic steel 6131, the fifth magnetic steel 6133 and the fifth magnetic steel 6135 close to the copper sheet 3 is N pole, and the magnetism of the other end of the fifth magnetic steel 6131, the fifth magnetic steel 6133 and the fifth magnetic steel 6135 is S pole.

[0039] In some embodiments, see Figure 4The magnetic steel unit 61 includes two sixth magnetic steels 614 and one seventh magnetic steel 615. The seventh magnetic steel 615 is arranged between the two sixth magnetic steels 614, and magnetizes the two sixth magnetic steels 614 in the direction of the Y axis respectively, and the magnetization directions of the two sixth magnetic steels 614 are opposite; the seventh magnetic steel 615 is magnetized in the direction of the X axis; at the same time, the two first magnetic steels 71 are magnetized in the direction of the Y axis, and the magnetization directions of the two first magnetic steels 71 are opposite; the second magnetic steel 72 is magnetized in the direction of the X axis, the magnetization direction of each first magnetic steel 71 is the same as the magnetization direction of the corresponding sixth magnetic steel 614, and the magnetization direction of the second magnetic steel 72 is opposite to the magnetization direction of the seventh magnetic steel 615, that is, the magnetization direction of one first magnetic steel 71 is the same as the magnetization direction of the sixth magnetic steel 614 facing the first magnetic steel 71, and the magnetization direction of another first magnetic steel 71 is the same as the magnetization direction of the sixth magnetic steel 614 facing the first magnetic steel 71. This will make the magnetic properties of one end of the seventh magnetic steel 615 close to one sixth magnetic steel 614 and the other end of the seventh magnetic steel 615 close to another sixth magnetic steel 614 opposite, that is, among the two ends of the seventh magnetic steel 615 located in the horizontal direction, when the magnetic pole of one end close to one sixth magnetic steel 614 is the N pole, the magnetic pole of the other end close to the other sixth magnetic steel 614 is the S pole; or when the magnetic pole of one end close to one sixth magnetic steel 614 is the S pole, the magnetic pole of the other end close to the other sixth magnetic steel 614 is the N pole. And the magnetic properties of one end of the seventh magnetic steel 615 close to one sixth magnetic steel 614 are opposite to the magnetic properties of one end of the second magnetic steel 72 close to one first magnetic steel 71, for example, when the magnetic pole of one end of the seventh magnetic steel 615 close to one sixth magnetic steel 614 is the S pole, the magnetic pole of one end of the second magnetic steel 72 close to one first magnetic steel 71 is the N pole; the magnetic properties of the other end of the seventh magnetic steel 615 close to another sixth magnetic steel 614 are opposite to the magnetic properties of the other end of the second magnetic steel 72 close to another first magnetic steel 71, for example, when the magnetic pole of the other end of the seventh magnetic steel 615 close to another sixth magnetic steel 614 is the N pole, the magnetic pole of the other end of the second magnetic steel 72 close to another first magnetic steel 71 is the S pole, so that the magnetic poles of the seventh magnetic steel 615 and the second magnetic steel 72 on the same side are opposite.

[0040] As an implementation, please continue to see Figure 4, the size of the magnetic steel refers to the width of the magnetic steel along the X-axis direction, the length along the Y-axis direction, and the height along the Z-axis direction. The difference in size between the first magnetic steel 71 and the sixth magnetic steel 614 refers to the difference in the width of the first magnetic steel 71 and the width of the sixth magnetic steel 614, or the difference in the length of the first magnetic steel 71 and the length of the sixth magnetic steel 614, or the difference in the height of the first magnetic steel 71 and the height of the sixth magnetic steel 614. The difference in size between the second magnetic steel 72 and the seventh magnetic steel 615 refers to the difference in the width of the second magnetic steel 72 and the width of the seventh magnetic steel 615, or the difference in the length of the second magnetic steel 72 and the length of the seventh magnetic steel 615, or the difference in the height of the second magnetic steel 72 and the height of the seventh magnetic steel 615.

[0041] As an implementation, see Figure 5 The cross distribution of the magnetic steel unit 61 and the first magnetic steel 71 means that the placement direction of the magnetic steel unit 61 is along the Y-axis direction, and the placement direction of the first magnetic steel 71 is along the X-axis direction. The parallel distribution of the first magnetic steel 71 and the second magnetic steel 72 means that the placement direction of the first magnetic steel 71 and the placement direction of the second magnetic steel 72 are the same, such as the first magnetic steel 71 and the second magnetic steel 72 are both placed along the X-axis direction.

[0042] As an implementation, see Figure 6 The linear motor also includes a pole core 8, which is arranged between the first group of magnetic steels 6 and the second group of magnetic steels 7. The pole core 8 is connected to the mass block 5. The pole core 8 can be made of magnetic conductive materials and non-magnetic conductive materials. The magnetic conductive materials include iron-cobalt, SPCD steel, 430 steel, etc. The non-magnetic conductive materials include tungsten-nickel alloy, 301 stainless steel, 304 stainless steel, etc.

[0043] In some embodiments, see Figure 6 , the two ends of the pole core 8 are welded to the mass block 5, or the two ends of the pole core 8 are glued to the mass block 5, that is, the pole core 8 and the mass block 5 are welded or glued to each other. At least part of the two ends of the pole core 8 are respectively located on the mass block 5 along the direction close to the voice coil 4 in the positive projection of the mass block 5. For example, two trapezoidal grooves are formed on the mass block 5, one end of the pole core 8 is partially placed on one trapezoidal groove, and the other end of the pole core 8 is partially placed on the other trapezoidal groove, so that the positive projection of one end of the pole core 8 on one trapezoidal groove in the mass block 5 along the direction close to the voice coil 4 is located in the trapezoidal groove, and the positive projection of the other end of the pole core 8 on the other trapezoidal groove in the mass block 5 along the direction close to the voice coil 4 is located in the trapezoidal groove, which is conducive to improving the firmness of the connection between the pole core 8 and the mass block 5.

[0044] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A linear motor, characterized in that: The linear motor comprises: a shell having a receiving space, a stator and a vibrator received in the receiving space, the stator being fixedly connected to the shell, the vibrator being connected to the shell through an elastic component and suspended in the receiving space, the stator comprising a voice coil and a copper sheet, the vibrator comprising a mass block having a first blind hole and a second blind hole and a first group of magnetic steels and a second group of magnetic steels, the mass block being located between the copper sheet and the voice coil, the first blind hole and the second blind hole being spaced apart, the first blind hole being located between the copper sheet and the second blind hole, the first group of magnetic steels being arranged in the first blind hole, the second group of magnetic steels being arranged in the second blind hole, the voice coil driving the vibrator to vibrate along the X-axis direction, and the first group of magnetic steels comprising one or more magnetic steel units.

2. The linear motor according to claim 1, characterized in that: The second group of magnetic steels includes two first magnetic steels and a second magnetic steel disposed between the two first magnetic steels.

3. The linear motor according to claim 2, characterized in that: The magnetic steel unit includes a third magnetic steel, and the third magnetic steel has two magnetized regions distributed along the X-axis direction. Each of the magnetized regions is magnetized along the Y-axis direction, and the magnetization directions of the two magnetized regions are opposite.

4. The linear motor according to claim 2, characterized in that: The magnetic steel unit includes two fourth magnetic steels, and the two fourth magnetic steels are magnetized along the Y-axis direction and in opposite directions.

5. The linear motor according to claim 2, characterized in that: The magnetic steel unit includes five or seven fifth magnetic steels.

6. The linear motor according to claim 2, characterized in that: The magnetic steel unit includes two sixth magnetic steels and a seventh magnetic steel arranged between the two sixth magnetic steels, the two sixth magnetic steels are magnetized along the Y-axis direction and in opposite magnetization directions, the seventh magnetic steel is magnetized along the X-axis direction, the two first magnetic steels are magnetized along the Y-axis direction and in opposite magnetization directions, the second magnetic steel is magnetized along the X-axis direction, the magnetization direction of each of the first magnetic steels is the same as the magnetization direction of the corresponding sixth magnetic steel, and the magnetization direction of the second magnetic steel is opposite to the magnetization direction of the seventh magnetic steel.

7. The linear motor according to claim 6, characterized in that: The first magnetic steel and the sixth magnetic steel have different sizes, and the second magnetic steel and the seventh magnetic steel have different sizes.

8. The linear motor according to claim 2, characterized in that: The magnetic steel unit is cross-distributed with the first magnetic steel, and the first magnetic steel and the second magnetic steel are distributed in parallel.

9. The linear motor according to claim 1, characterized in that: The linear motor further includes a pole core, which is disposed between the first group of magnetic steels and the second group of magnetic steels, and is connected to the mass block.

10. The linear motor according to claim 9, characterized in that: The two ends of the pole core are respectively welded to the mass block, or the two ends of the pole core are respectively glued to the mass block; the two ends of the pole core are at least partially projected on the mass block in a direction close to the voice coil.

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