CN220421634U - Linear motor and health care apparatus - Google Patents

Abstract

The utility model discloses a linear motor and a health care instrument, wherein the linear motor comprises: the framework is provided with a sliding channel which is communicated with the framework along the axial direction of the framework; the magnet is movably arranged in the sliding channel; one end of the output shaft is connected with the magnet, and the other end of the output shaft extends to the outside of the sliding channel in a direction away from the magnet; and the coils are wound outside the framework along the circumferential direction of the framework, at least two coils are arranged, two adjacent coils are connected with each other and have opposite winding directions, and a magnetic field generated by energizing the coils drives the magnet to linearly move in the sliding channel. The technical scheme of the utility model provides the linear motor with a simple structure.

Description

Linear motor and health care apparatus

Technical Field

The utility model relates to the technical field of motors, in particular to a linear motor and a health care instrument.

Background

Many common health care apparatuses need to realize functions through linear motion, such as fascia guns, electric powder puff instruments, beating type massage instruments, water light guiding instruments and the like, and the products do linear motion when in work, and the health care apparatuses are generally carried about, so that the product size is required to be small.

Conventional health care devices generally convert the rotary motion of a rotary motor into linear motion by driving a link mechanism through an eccentric wheel or a cam. In this process, to ensure the operation efficiency of the motor, the motor generally operates at a higher slip level, and the rotation speed of the motor needs to be reduced by a reduction gearbox to increase the torque of the motor.

However, this driving form has a problem of complicated structure.

Disclosure of Invention

The utility model mainly aims to provide a linear motor and aims to provide a linear motor with a simple structure.

In order to achieve the above object, the present utility model provides a linear motor, comprising:

the framework is provided with a sliding channel which is communicated with the framework along the axial direction of the framework;

the magnet is movably arranged in the sliding channel;

an output shaft, one end of which is connected with the magnet, and the other end of which extends to the outside of the sliding channel in a direction away from the magnet; and

the coils are wound outside the framework along the circumferential direction of the framework, at least two coils are arranged, two adjacent coils are connected with each other and have opposite winding directions, and a magnetic field generated by energizing the coils drives the magnet to linearly move in the sliding channel.

Optionally, the number of magnets is one less than the number of coils.

Optionally, at least two magnets are arranged, and the same ends of the magnetic poles of two adjacent magnets are closely attached.

Optionally, the linear motor further includes a first end cover, where the first end cover is disposed at one end of the skeleton, seals the sliding channel, and is provided with a through hole through which the output shaft passes.

Optionally, the first end cover and the framework are of an integrated structure; and/or the number of the groups of groups,

the linear motor further comprises a supporting piece, the supporting piece is arranged on the inner wall of the through hole, and the output shaft penetrates through the supporting piece and is in sliding connection with the supporting piece.

Optionally, the linear motor further includes a second end cover, where the second end cover is disposed at an end of the skeleton facing away from the first end cover, and seals the sliding channel and is detachably connected with the skeleton.

Optionally, the linear motor further comprises a buffer member, wherein the buffer member is arranged between the first end cover and the magnet, and/or the buffer member is arranged between the second end cover and the magnet.

Optionally, the magnet has a gap with an inner wall of the sliding channel; and/or the number of the groups of groups,

the magnet is provided with a mounting hole, the magnet is sleeved on the periphery of the output shaft through the mounting hole, and the mounting hole is in interference fit with the output shaft.

Optionally, a partition part is arranged on the outer peripheral surface of the framework, and the partition part is arranged between two adjacent coils; and/or the number of the groups of groups,

the output shaft is made of non-magnetic material.

The utility model also proposes a health care device, characterized in that it comprises:

the linear motor; and

and the linear motor is in driving connection with the execution piece so as to enable the execution piece to move linearly.

The linear motor comprises a framework, a magnet output shaft and a coil, wherein a sliding channel is arranged on the framework, the magnet and the output shaft are connected with a rotor which is formed into a motor, the magnet and the output shaft can slide in the sliding channel, the coil is wound on the outer peripheral surface of the framework, when the coil is electrified, the coil forms a magnetic field, the magnetic pole direction of the coil is arranged to repel the magnetic pole direction of the magnet, the magnet can move linearly along the sliding channel under the action of the magnetic field of the coil, the output shaft is driven to move linearly, the direction of the magnetic field is changed to enable the magnet to move linearly reversely, the structure for realizing linear movement is simple, the manufacturing is easy, the manufacturing size is smaller, and the linear motor is suitable for more products. In the scheme, at least two coils are arranged outside the framework, and the winding directions of the adjacent coils are opposite, so that after the coils are electrified, the magnetic pole directions of the adjacent coils are opposite. For example, in the case of two coils, it is assumed that the magnet has a first position and a second position inside the sliding channel, when the magnet is in the first position, the coil is energized to make the magnetic pole direction of the first coil in the first position repel the magnetic pole direction of the magnet, and at the moment, the magnetic pole direction of the second coil in the second position attracts the magnetic pole direction of the magnet, so that the magnet moves from the first position to the second position under the repulsive force of the first coil, and at the same time, the magnet is subjected to the attractive force of the second coil, so that the acting force of the magnetic field applied to the magnet is increased, and the thrust of an output shaft connected with the magnet is improved, and the thrust of the motor is also improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of an embodiment of a linear motor of the present utility model;

FIG. 2 is a schematic diagram of a linear motor according to an embodiment of the present utility model;

FIG. 3 is an exploded view of one embodiment of a linear motor according to the present utility model;

fig. 4 is a schematic structural diagram of a skeleton of an embodiment of a linear motor according to the present utility model.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				110	Skeleton frame	120	First end cap
130	Partition part	200	Magnet body
				300	Output shaft	400	Coil
500	Support member	600	Second end cap
				700	Buffer member

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides a linear motor.

Referring to fig. 1 to 3, fig. 1 is a cross-sectional view of an embodiment of the linear motor of the present utility model, fig. 2 is a schematic structural view of an embodiment of the linear motor of the present utility model, and fig. 3 is an exploded view of an embodiment of the linear motor of the present utility model.

In an embodiment of the present utility model, the linear motor includes:

a skeleton 110 provided with a sliding passage penetrating in the axial direction thereof;

a magnet 200 movably disposed inside the sliding channel;

an output shaft 300, one end of the output shaft 300 being connected to the magnet 200, the other end of the output shaft 300 extending to the outside of the sliding passage in a direction away from the magnet 200; and

the coils 400 are wound on the outside of the framework 110 along the circumferential direction of the framework 110, at least two coils 400 are arranged, two adjacent coils 400 are connected with each other, winding directions are opposite, and the magnetic field generated by energizing the coils 400 drives the magnet 200 to linearly move in the sliding channel.

The linear motor in one technical scheme of the embodiment of the utility model comprises a framework 110, an output shaft 300 of a magnet 200 and a coil 400, wherein a sliding channel is arranged on the framework 110, the magnet 200 and the output shaft 300 are connected with a rotor which is formed into a motor, the magnet 200 and the output shaft 300 can slide in the sliding channel, the coil 400 is wound on the peripheral surface of the framework 110, when the coil 400 is electrified, the coil 400 forms a magnetic field, the magnetic pole direction of the coil 400 is arranged to repel the magnetic pole direction of the magnet 200, the magnet 200 can perform linear motion along the sliding channel under the action of the magnetic field of the coil 400, and further the output shaft 300 is driven to perform linear motion, the direction of the magnetic field is changed to enable the magnet 200 to perform reverse linear motion, the structure form of the linear motion is simple, the linear motion is easy to manufacture, the size can be made smaller, and the linear motor is suitable for more products. In this embodiment, at least two coils 400 are arranged outside the framework 110, and winding directions of adjacent coils 400 are opposite, so that after the coils 400 are electrified, magnetic pole directions of the adjacent coils 400 are opposite. For example, in the case of two coils 400, assuming that the magnet 200 has a first position and a second position inside the sliding channel, when the magnet 200 is in the first position, the coil 400 is energized to make the magnetic pole direction of the first coil 400 at the first position repel the magnetic pole direction of the magnet 200, and when the magnetic pole direction of the second coil 400 at the second position attracts the magnetic pole direction of the magnet 200, the magnet 200 moves from the first position to the second position under the repulsive force of the first coil 400, and at the same time, the magnet 200 receives the attractive force of the second coil 400, so that the magnetic field acting force received by the magnet 200 increases, thereby increasing the thrust of the output shaft 300 connected to the magnet 200, and also increasing the thrust of the motor.

In this embodiment, the outer periphery of the magnet 200 corresponds to the shape of the sliding channel, and the cross section of the sliding channel may be square or cylindrical, and in this embodiment, the sliding channel is cylindrical, and the magnet 200 and the output shaft 300 are cylindrical, so that the processing is easy. In this embodiment, the coil 400 is formed by one continuous winding, and no secondary wiring is needed, thereby reducing the manufacturing cost. In the embodiment, the linear motor is small in size, the general diameter is smaller than 30mm, the stroke is within 30mm, the thrust is within 20N, the weight is light, and the linear motor is convenient to apply to portable products.

Alternatively, the number of magnets 200 is one less than the number of coils 400.

Referring to fig. 1, in the present embodiment, the length of the magnet 200 in the axial direction of the sliding channel is equal to the length of the coil 400 in the axial direction of the sliding channel, and the number of magnets 200 is one less than the number of coils 400, for example: when the number of coils 400 is two, the number of magnets 200 is one; when the number of coils 400 is three, the number of magnets 200 is two; the sliding travel of the mover formed by the magnet 200 and the output shaft 300 in the sliding channel is the length of one coil 400 along the axial direction of the sliding channel, and the structure is simple and easy to manufacture.

Optionally, at least two magnets 200 are provided, and the ends of the adjacent two magnets 200 with the same magnetic pole are closely attached.

Referring to fig. 1 and 3, in this embodiment, at least two magnets 200 are provided, the same ends of the magnetic poles of two adjacent magnets 200 are tightly attached, the two magnets 200 can be connected together by glue adhesion, the two magnets 200 can be connected together by welding, and the relative positions of the magnets 200 and the output shaft 300 can be fixed by interference fit with the output shaft 300, so that the same ends of the magnetic poles of the two magnets 200 are tightly attached. In particular, in this embodiment, two magnets 200 are provided, three coils 400 are provided, and assuming that the mover formed by the magnets 200 and the output shaft 300 has a first position and a second position, when in the first position, the first magnet 200 corresponds to the first coil 400 in position, the second magnet 200 corresponds to the second coil 400 in position, no magnet 200 is provided at the third coil 400, at this time, the coils 400 are energized, so that the magnetic pole direction of the first coil 400 is repulsive to the magnetic pole direction of the first magnet 200, and since the adjacent two coils 400 are opposite in direction, and the same ends of the adjacent two magnets 200 are opposite in magnetic pole, the magnetic pole direction of the second coil 400 is also repulsive to the magnetic pole direction of the second magnet 200, and the magnetic pole direction of the third coil 400 is also attracted to the magnetic pole direction of the second magnet 200, at this time, under the repulsive force of the first coil 400, the second magnet 200 is under the repulsive force of the second coil 400 and the attractive force of the third coil 400, so that the mover moves to the second position, and the second coil 200 corresponds to the second coil 200; when the mover moves to the second position, the direction of the energizing of the coils 400 is changed, so that the second magnet 200 is under the repulsive force of the third coil 400, and the first magnet 200 is under the repulsive force of the second coil 400 and the attractive force of the first coil 400, so that the mover returns to the first position. In this embodiment, by tightly attaching the same ends of the magnetic poles of the two adjacent magnets 200, the magnetic force of the coil 400 applied to the magnets 200 is further enhanced, so as to improve the thrust of the motor.

Optionally, the linear motor further includes a first end cover 120, where the first end cover 120 is disposed at one end of the skeleton 110, seals the sliding channel, and is provided with a through hole for the output shaft 300 to pass through.

Referring to fig. 1, in the present embodiment, the linear motor further includes a first end cover 120, the first end cover 120 is disposed at one end of the frame 110, so as to conveniently block the mover formed by the magnet 200 and the output shaft 300 from escaping from the sliding channel, and a through hole is formed in the first end cover 120, and the shape of the through hole corresponds to the shape of the output shaft 300.

Optionally, the first end cap 120 is of unitary construction with the backbone 110; and/or the number of the groups of groups,

the linear motor further comprises a support piece 500, the support piece 500 is arranged on the inner wall of the through hole, and the output shaft 300 penetrates through the support piece 500 and is in sliding connection with the support piece 500.

Referring to fig. 1 and fig. 4, in the present embodiment, the first end cover 120 and the framework 110 are in an integral structure, so that the problem of the reduced assembly accuracy of the motor caused by the poor assembly of the first end cover 120 and the framework 110 is avoided, and meanwhile, the structure is simple, the molding is easy, and in the present embodiment, the plastic material is adopted, so that the material cost is reduced.

Referring to fig. 1 and 3, in the present embodiment, a support 500, which may be a linear bearing or a copper bush, etc., is provided at an inner wall of the through hole, supports the output shaft 300 to move linearly and reduces friction with the output shaft 300. In this embodiment, a copper sleeve is used as the supporting member 500, which has small size, low cost and strong wear resistance.

Optionally, the linear motor further includes a second end cover 600, where the second end cover 600 is disposed at an end of the frame 110 facing away from the first end cover 120, and seals the sliding channel and is detachably connected to the frame 110.

In this embodiment, the linear motor further includes a second end cover 600, where the second end cover 600 is detachably connected to the frame 110, and may be fixed by a fastening or screwing manner, so as to facilitate assembling the output shaft 300 and the magnet 200 into the sliding channel. In particular, in this embodiment, the second end cover 600 is further provided with an assembly hole, so that the assembly is convenient when the linear motor is assembled to the related components, and the occupied space of the linear motor is reduced.

Optionally, the linear motor further includes a buffer 700, wherein the buffer 700 is disposed between the first end cap 120 and the magnet 200, and/or the buffer 700 is disposed between the second end cap 600 and the magnet 200.

In this embodiment, the linear motor further includes a buffer member 700, where the buffer member 700 may be a spring, or may be a buffer pad made of an elastic material, and the elastic material may be rubber or nylon. The buffer member 700 may be provided between the first end cap 120 and the magnet 200 such that a rigid collision between the magnet 200 and the first end cap 120 becomes a flexible collision, reducing collision impact, and improving the service life of the motor; the buffer member 700 may be provided between the second end cap 600 and the magnet 200 so that the rigid collision between the magnet 200 and the second end cap 600 becomes a flexible collision, reducing collision impact, and improving the service life of the motor.

Alternatively, the magnet 200 has a gap with the inner wall of the sliding channel; and/or the number of the groups of groups,

the magnet 200 is provided with a mounting hole, the magnet 200 is sleeved on the periphery of the output shaft 300 through the mounting hole, and the mounting hole is in interference fit with the output shaft 300.

In this embodiment, the magnet 200 and the inner wall of the sliding channel have a gap, so that there is no contact between the magnet 200 and the inner wall of the sliding channel, and the friction force applied when the magnet 200 slides under the action of the magnetic field is reduced, thereby improving the smoothness of sliding of the magnet 200 and improving the thrust of the motor.

In this embodiment, the magnet 200 is provided with a mounting hole, and is in interference fit with the output shaft 300 to achieve relative fixation, so that the relative fixation is easy to achieve, the manufacturing cost is low, and compared with modes such as welding or bonding, the influence on the center of gravity of the output shaft 300 is small, so that the smoothness of the output shaft 300 in linear motion is ensured.

Alternatively, the outer circumferential surface of the bobbin 110 is provided with a partition portion 130, and the partition portion 130 is provided between two adjacent coils 400; and/or the number of the groups of groups,

the output shaft 300 is made of a non-magnetic material.

Referring to fig. 4, in the present embodiment, a blocking portion 130 is provided on the outer circumferential surface of the bobbin 110, and the blocking portion 130 blocks two adjacent coils 400, thereby preventing adjacent coils 400 from interfering with each other by contact. Specifically, in the present embodiment, the partition 130, the skeleton 110, and the first end cap 120 are integrally formed.

In this embodiment, the output shaft 300 is made of a non-magnetic material, which may be plastic or aluminum, so as to prevent the magnetic field of the coil 400 from magnetically attracting the output shaft 300, thereby preventing the output shaft 300 from performing linear motion.

The utility model also provides a health care instrument which comprises an executing piece and a linear motor, wherein the specific structure of the linear motor refers to the embodiment, and as the health care instrument adopts all the technical schemes of all the embodiments, the health care instrument at least has all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted. Wherein, the linear motor drives and connects the actuating member so as to make the actuating member move linearly. The health care instrument can be of various types, such as fascia gun, beating type massage instrument, electric powder puff instrument, water light leading-in instrument and the like, and the massage piece is connected with the linear motor in a detachable mode according to the specific design of the health care instrument, such as clamping connection or screw connection and the like, and the massage piece is driven by the linear motor to conduct linear motion.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. A linear motor, comprising:

the framework is provided with a sliding channel which is communicated with the framework along the axial direction of the framework;

the magnet is movably arranged in the sliding channel;

an output shaft, one end of which is connected with the magnet, and the other end of which extends to the outside of the sliding channel in a direction away from the magnet; and

the coils are wound outside the framework along the circumferential direction of the framework, at least two coils are arranged, two adjacent coils are connected with each other and have opposite winding directions, and a magnetic field generated by energizing the coils drives the magnet to linearly move in the sliding channel.

2. The linear motor of claim 1, wherein the number of magnets is one less than the number of coils.

3. The linear motor of claim 2, wherein at least two magnets are provided, and adjacent ones of said magnet poles are closely attached at the same end.

4. The linear motor of claim 1, further comprising a first end cap disposed at one end of the frame, sealing the sliding channel and having a through hole through which the output shaft passes.

5. The linear motor of claim 4, wherein the first end cap is of unitary construction with the armature; and/or the number of the groups of groups,

the linear motor further comprises a supporting piece, the supporting piece is arranged on the inner wall of the through hole, and the output shaft penetrates through the supporting piece and is in sliding connection with the supporting piece.

6. The linear motor of claim 4, further comprising a second end cap disposed at an end of the frame facing away from the first end cap, the second end cap sealing the sliding channel and removably coupled to the frame.

7. The linear motor of claim 6, further comprising a buffer member disposed between the first end cap and the magnet and/or the buffer member disposed between the second end cap and the magnet.

8. The linear motor of claim 1, wherein the magnet has a gap from an inner wall of the sliding channel; and/or the number of the groups of groups,

the magnet is provided with a mounting hole, the magnet is sleeved on the periphery of the output shaft through the mounting hole, and the mounting hole is in interference fit with the output shaft.

9. The linear motor of claim 1, wherein the outer circumferential surface of the bobbin is provided with a partition portion provided between two adjacent coils; and/or the number of the groups of groups,

the output shaft is made of non-magnetic material.

10. A health care device, comprising:

a linear motor as claimed in any one of claims 1 to 9; and

and the linear motor is in driving connection with the execution piece so as to enable the execution piece to move linearly.