CN218124531U

CN218124531U - Voice coil motor, oscillator and breathing machine

Info

Publication number: CN218124531U
Application number: CN202221978127.7U
Authority: CN
Inventors: 张飞宇; 封志纯; 史源; 吴本清; 尹鹏; 邹栋
Original assignee: Shenzhen Comen Medical Instruments Co Ltd
Current assignee: Shenzhen Comen Medical Instruments Co Ltd
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2022-12-23
Anticipated expiration: 2032-07-28

Abstract

The embodiment of the utility model discloses voice coil motor, oscillator and breathing machine, voice coil motor include active cell and stator. The rotor comprises a support and a coil group fixedly connected to the support, the coil group comprises a coil framework and a coil, the coil framework is arranged in an annular mode, the coil is wound on the outer wall of the coil framework, one end of the coil framework is fixedly connected to the support, the wall thickness of the coil framework is smaller than or equal to 2mm, and a plurality of wall grooves are formed in the coil framework; the stator is fixed to be set up, and the stator can produce fixed magnetic field, stator and active cell swing joint for when circular telegram to the coil, the active cell can be followed the direction and moved under the effect in magnetic field. Through the arrangement, the rotor is lighter in weight, and the inertia of the rotor is smaller. Therefore, the mover can move back and forth under the action of the magnetic field more stably and is not easy to shake, so that the noise generated by shaking of the mover can be reduced, the deformation of the mover structure caused by shaking of the mover can be effectively avoided, and the service life of the voice coil motor is ensured.

Description

Voice coil motor, oscillator and breathing machine

Technical Field

The utility model relates to a breathing machine technical field especially relates to a voice coil motor, oscillator and breathing machine.

Background

The ventilator can ventilate a patient to achieve an expected treatment effect, and in some special treatment scenes, in order to achieve the required treatment effect, a high-frequency oscillation type ventilator needs to be used, the high-frequency oscillation type ventilator can generate oscillation airflow far higher than the normal breathing frequency through a high-frequency oscillator, and the oscillation airflow can act on the main airway of the ventilator, so that the high-frequency ventilation function of the ventilator is realized. The high-frequency oscillator of the existing high-frequency oscillation type breathing machine uses a linear actuator to drive a diaphragm to perform piston motion to generate oscillating airflow, and the linear actuator generally comprises a rotor and a stator, wherein the rotor moves relative to the stator to drive the diaphragm to vibrate.

However, in the related art, when the mover of the linear actuator moves, there is a possibility that the mover may shake due to insufficient stability, which may cause not only loud noise but also structural deformation due to the shake, which may damage the structure of the linear actuator and affect the life of the linear actuator.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a voice coil motor, an oscillator, and a ventilator that address the above problems.

On the one hand, the embodiment of the utility model provides a voice coil motor, voice coil motor includes:

the rotor comprises a support and a coil assembly fixedly connected to the support, the coil assembly comprises a coil framework and a coil, the coil framework is arranged in an annular mode, the coil is wound on the outer wall of the coil framework, one end of the coil framework is fixedly connected to the support, the wall thickness of the coil framework is smaller than or equal to 2mm, and a plurality of wall grooves are formed in the coil framework; and

the stator is fixedly arranged and can generate a fixed magnetic field, and the stator is movably connected with the rotor, so that when the coil is electrified, the rotor can move along one direction under the action of the magnetic field.

In some embodiments of a voice coil motor, the plurality of wall slots extend through a peripheral wall of the bobbin about the bobbin axis;

or the coil skeleton is internally provided with an inner cavity around the axis thereof, so that the peripheral wall of the coil skeleton is hollow.

In some embodiments of the voice coil motor, the support includes a base and a side wall, the side wall is annularly arranged on the edge of the base, so that the base and the side wall form a concave shape, and the coil bobbin is fixedly connected to the side wall.

In some embodiments of the voice coil motor, a sliding groove is formed in the stator, a shaft core for being in plug-in fit with the sliding groove is arranged on the base, and the rotor is movably connected with the stator by plugging the shaft core into the sliding groove.

In some embodiments of the voice coil motor, the stator is further provided with a guide groove along the moving direction of the shaft core, and when the shaft core moves in the slide groove, the coil assembly can be inserted into the guide groove.

In some embodiments of the voice coil motor, an abutting portion is convexly disposed at a position of the sliding groove, where one end of the stator faces the bracket, and the shaft core is provided with a flexible buffer.

In some embodiments of the voice coil motor, the outer wall of the stator is further provided with a heat dissipation groove.

On the other hand, the embodiment of the utility model provides a still provide an oscillator, the oscillator includes:

the air cavity is sealed inside the body, the body is provided with air vents and air vents which are arranged at intervals, and the air vents are used for communicating the air cavity with the outside;

the diaphragm is arranged in the body and positioned between the vent hole and the exhaust hole, the diaphragm divides the air cavity into two sub-cavities which are not communicated, and the two sub-cavities are respectively communicated with the outside through the vent hole and the exhaust hole; and

the voice coil motor is arranged in the body and used for driving the diaphragm to vibrate.

In some embodiments of the oscillator, the oscillator further includes a pressing plate, a middle portion of the diaphragm is located between the pressing plate and the mover, and the pressing plate is connected to the mover through a screw to fix the middle portion of the diaphragm to the mover.

In another aspect, the present invention provides a breathing machine, which includes: a body and the oscillator described above, the oscillator being mounted in the body.

Adopt the embodiment of the utility model provides a, following beneficial effect has:

through fixing coil assembly on the support, when two kinds of electric currents of equidirectional not for coil assembly, can produce two kinds of different magnetic fields, under the cooperation of the different magnetic fields that coil assembly produced and stator fixed magnetic field, can realize drive coil assembly reciprocating motion, and then drive support reciprocating motion. And a plurality of wall grooves are arranged on the peripheral wall of the coil framework, and the wall thickness of the coil framework is limited to be less than or equal to 2mm, so that the mass of the coil framework in the application is less than that of the existing coil framework with the same volume, the mass of the whole rotor is lighter, the inertia of the rotor is smaller, and the motion state of the rotor is easier to change. Therefore, the mover can move back and forth under the action of the magnetic field more stably and is not easy to shake, noise generated by shaking of the mover can be reduced, deformation of the mover structure caused by shaking of the mover can be effectively avoided, and the service life of the voice coil motor is guaranteed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Wherein:

fig. 1 shows an exploded view of an oscillator according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram illustrating a coil bobbin of a voice coil motor according to an embodiment of the present invention;

fig. 3 is a cross-sectional view illustrating a bobbin of a voice coil motor according to an embodiment of the present invention;

fig. 4 shows a cross-sectional view of a stator of a voice coil motor according to an embodiment of the present invention;

fig. 5 shows a cross-sectional view of a cylinder of an oscillator according to an embodiment of the present invention;

fig. 6 shows a schematic structural diagram of a ventilator provided according to an embodiment of the present invention.

Description of the main element symbols:

100. an oscillator; 200. a main body; 300. an electromagnetic valve; 301. an air duct; 1. a mover; 11. a support; 111. a base; 112. a side wall; 12. a coil assembly; 121. a coil former; 1211. a wall groove; 1212. an inner cavity; 122. a coil; 13. a shaft core; 14. a buffer member; 2. a stator; 21. a heat sink; 22. a chute; 23. a guide groove; 24. an abutting portion; 30. a body; 31. a vent hole; 32. an exhaust hole; 33. a front plate; 331. a second cavity; 34. a cylinder body; 341. a first cavity; 40. a membrane; 401. connecting the outer edges; 50. and (7) pressing a plate.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In one aspect, the embodiment of the present invention provides a voice coil motor, which can provide driving force, for example in the embodiment of the present invention, the voice coil motor is used in the oscillator 100 to provide driving force for the operation of the oscillator 100. In an embodiment, referring to fig. 1, the voice coil motor includes a mover 1 and a stator 2, wherein the mover 1 includes a support 11 and a coil assembly 12 fixedly connected to the support 11, the coil assembly 12 includes a coil bobbin 121 annularly disposed and a coil 122 wound around a peripheral wall of the coil bobbin 121, and one end of the coil bobbin 121 can be fixed to the support 11.

The bobbin 121 has a plurality of wall grooves 1211 formed in a circumferential wall thereof, and the wall grooves may be formed in an outer wall or an inner wall of the bobbin 121. When the bobbin 121 is manufactured, the wall thickness of the bobbin 121 may be set to be 2mm or less, and the bobbin 121 may be manufactured with a low density, for example, the bobbin 121 may be made of a light alloy material such as an aluminum alloy, or the bobbin 121 may be made of kraft paper, and of course, the material for manufacturing the bobbin 121 is not limited to the above-mentioned material, and may be made of other suitable materials.

Stator 2 is fixed to be set up, the embodiment of the utility model provides an in, stator 2 is magnet for produce fixed magnetic field, seted up radiating groove 21 on stator 2's the outer wall, in order to increase the radiating effect. The stator 2 is movably connected with the mover 1, when two currents in opposite directions are applied to the coil assembly 12, the coil assembly 12 generates two different magnetic fields, and under the action of the magnetic field generated by the coil assembly 12 and the fixed magnetic field of the stator 2, a driving force can be provided for the mover 1, where it should be noted that the moving direction of the mover 1 relative to the stator 2 is the same as the driving force, so that the driving force can drive the mover 1 to move.

Through fixing coil group 12 on support 11, when two kinds of electric currents of equidirectional not for coil group 12, can produce two kinds of different magnetic fields, under the cooperation of the different magnetic fields that coil group 12 produced and the fixed magnetic field of stator 2, can realize drive coil group 12 reciprocating motion, and then drive support 11 reciprocating motion. By providing the plurality of wall grooves 1211 on the circumferential wall of the coil bobbin 121 and limiting the wall thickness of the coil bobbin 121 to be less than or equal to 2mm, the mass of the coil bobbin 121 in the present application is less than that of the conventional coil bobbin 121 having the same volume, so that the entire mover 1 has a lighter mass, the inertia of the mover 1 is smaller, and the motion state of the mover 1 is easily changed. Therefore, the mover 1 can move back and forth under the action of the magnetic field more stably and is not easy to shake, noise generated by shaking of the mover 1 can be reduced, deformation of the mover 1 structure caused by shaking of the mover 1 can be effectively avoided, and the service life of the voice coil motor is guaranteed.

In an embodiment, referring to fig. 1 to 3, the wall slots 1211 are disposed on the peripheral wall of the bobbin 121 around the axis of the bobbin 121, the wall slots 1211 are disposed at intervals and are not connected to each other, and the wall slots 1211 are disposed through the peripheral wall of the bobbin 121, so that the bobbin 121 is hollowed out.

Alternatively, the inner cavity 1212 may be provided inside the bobbin 121 around the axis thereof so that the circumferential wall of the bobbin 121 is hollow. The entire inner cavity 1212 may be provided inside the circumferential wall of the bobbin 121, and a plurality of inner cavities 1212 may be provided at intervals inside the circumferential wall of the bobbin 121.

By providing the plurality of wall grooves 1211 on the bobbin 121 or providing the inner cavity 1212 in the circumferential wall of the bobbin 121, the material usage of the bobbin 121 can be reduced, which not only saves raw material for manufacturing the bobbin 121 and manufacturing cost, but also reduces the mass of the bobbin 121.

Alternatively, the coil assembly 12 may be provided with only the coil 122 without the bobbin 121, and one end of the coil 122 is directly fixedly connected to the bracket 11 through a molding process. In this way, the entire bobbin 121 is directly omitted, resulting in a lighter weight coil assembly 12.

In a specific embodiment, the bracket 11 includes a base 111 and a sidewall 112, the base 111 and the sidewall 112 are integrally formed, the base 111 can be in various shapes, such as a circle and a rectangle, in the embodiment of the present invention, the base 111 is integrally formed in a disc shape, the sidewall 112 is a thin-walled structure, the sidewall 112 is disposed around the edge of the base 111, and the sidewall 112 is perpendicular to the base 111, so that the base 111 and the sidewall 112 are enclosed to form a concave shape.

One end of the coil bobbin 121 can be sleeved at one end of the side wall 112 away from the base 111, the inner wall of the coil bobbin 121 is attached to the outer wall of the side wall 112, and the inner wall of the coil bobbin 121 is fixedly connected with the outer wall of the side wall 112 through a glue sealing process. Similarly, when the coil assembly 12 only includes the coil 122, one end of the coil 122 is sleeved on one end of the sidewall 112 far away from the base 111, and then the fixed connection manner between the coil 122 and the sidewall 112 is consistent with the connection manner between the coil bobbin 121 and the sidewall 112, which is not described herein again.

In a specific embodiment, please refer to fig. 4, the stator 2 may be rectangular, or may be in the shape of a cylinder, etc., in the embodiment of the present invention, the stator 2 is a cylinder as a whole. The stator 2 is provided with a sliding groove 22, the base 111 is provided with a shaft core 13 which is used for being in plug-in fit with the sliding groove 22, it should be noted that the sliding groove 22 is a cylindrical groove, the shaft core 13 is a cylindrical rod which is matched with the sliding groove 22, the axis of the sliding groove 22 coincides with the axis of the stator 2, and the axis of the shaft core 13 coincides with the axis of the base 111. The shapes of the sliding groove 22 and the shaft core 13 are not limited to the cylindrical shape, and may be other shapes such as a rectangular shape. The shaft core 13 is inserted into the sliding groove 22, so that the rotor 1 is movably connected with the stator 2.

It should be mentioned that, a guide groove 23 is further formed in the end of the stator 2 facing the mover 1 along the moving direction of the shaft core 13, the guide groove 23 is an annular groove, and the shaft diameter of the annular groove is consistent with the shaft diameter of the coil assembly 12, so that when the shaft core 13 moves in the sliding groove 22, the coil assembly 12 can be inserted and adapted in the guide groove 23. Through setting up guide way 23, increase a space of stepping down on stator 2 to when axle core 13 amplitude of movement is great, coil assembly 12 can peg graft in guide way 23, and then increase the motion range of active cell 1.

In addition, if the movement amplitude of the base 111 is too large during the movement toward the stator 2, the base 111 and the stator 2 may collide. At this time, an abutting portion 24 is protruded at a position of the sliding groove 22 at one end of the stator 2 facing the bracket 11, a flexible buffer 14 is sleeved at one end close to the base 111 on the outer wall of the shaft core 13, and the buffer 14 may be made of a material such as rubber. By providing the cushion member 14, when the base 111 moves toward the stator 2, it can abut against the abutting portion 24, and a rigid collision between the stator 2 and the base 111 can be avoided.

On the other hand, referring to fig. 1, an embodiment of the present invention further provides an oscillator 100, where the oscillator 100 is used in a ventilator to generate a high-frequency oscillating airflow in the ventilator, and the oscillator 100 includes a body 30, a diaphragm 40, and the above-mentioned voice coil motor. The inside of body 30 has inclosed air cavity, has air vent 31 and the exhaust hole 32 that the interval set up on the body 30, and air vent 31 and exhaust hole 32 all are used for communicating air cavity and external world, and body 30 is as the overall structure of oscillator 100, and its inside air cavity is used for providing the space for the installation of air business turn over and spare part, and air vent 31 and exhaust hole 32 all can be business turn over the air, and the air cavity also provides the installation environment for voice coil motor and diaphragm 40 simultaneously.

Specifically, referring to fig. 5, the body 30 includes a cylinder 34 and a front plate 33 mounted on the cylinder 34, and the front plate 33 can be detachably connected to the cylinder 34 by screws or by buckling, or by clipping. The cylinder 34 has a first cavity 341 inside, the front plate 33 has a second cavity 331 inside for communicating with the first cavity 341, when the front plate 33 is connected with the cylinder 34, the first cavity 341 and the second cavity 331 communicate to form an air chamber, the vent hole 31 penetrates on the front plate 33, and the exhaust hole 32 penetrates on the cylinder 34.

The diaphragm 40 is arranged in the body 30 and located between the vent hole 31 and the exhaust hole 32, the edge of the diaphragm 40 is annularly provided with the connecting outer edge 401, the connecting outer edge 401 of the diaphragm 40 can be clamped at the connecting position of the front plate 33 and the cylinder 34, the connecting outer edge 401 is clamped when the front plate 33 and the cylinder 34 are connected, the first cavity 341 and the second cavity 331 are further separated by the diaphragm 40 and are not communicated with each other, at the moment, the first cavity 341 is communicated with the outside through the exhaust hole 32, and the second cavity 331 is communicated with the outside through the vent hole 31.

Voice coil motor installs in body 30 for drive diaphragm 40 vibration, concrete voice coil motor's stator 2 passes through the fix with screw on the inside inner wall of keeping away from front bezel 33 of cylinder body 34, and voice coil motor's active cell 1 and diaphragm 40's middle part fixed connection, and then can drive diaphragm 40 vibration when making active cell 1 move.

Specifically, the oscillator 100 further includes a pressing plate 50, the middle portion of the diaphragm 40 is located between the pressing plate 50 and the base 111, and the pressing plate 50 is connected to the base 111 through screws to fix the middle portion of the diaphragm 40 to the base 111.

When the mover 1 drives the diaphragm 40 to move toward the first cavity 341, air inside the first cavity 341 is squeezed and exhausted from the exhaust hole 32, and at this time, air is sucked into the second cavity 331 through the vent hole 31; when the mover 1 drives the diaphragm 40 to move toward the second cavity 331, the air inside the second cavity 331 is compressed and exhausted from the vent hole 31, and at this time, the air inside the first cavity 341 is sucked through the exhaust hole 32.

It should be noted that the first cavity 341 is to provide an installation and movement space for the mover 1, and the vent hole 32 is provided to enable the air flow to enter and exit the first cavity 341 through the vent hole 32 when the diaphragm 40 vibrates back and forth, so as to stabilize the air pressure inside the first cavity 341.

In practical application, the vent hole 31 is connected to an external device requiring high-frequency airflow, and when the diaphragm 40 vibrates back and forth, airflow is stored in the second cavity 331 through the vent hole 31 and released to increase airflow of the external device.

In another aspect, please refer to fig. 1 and fig. 6, an embodiment of the present invention further provides a ventilator, which includes a main body 200 and the oscillator 100, wherein the oscillator 100 is installed in the main body 200. The oscillator 100 is further provided with an electromagnetic valve 300, the electromagnetic valve 300 has an air passage 301, and the air hole 31 of the oscillator 100 can communicate with a path for delivering air to a user through the main air passage of the ventilator via the electromagnetic valve 300.

The electromagnetic valve 300 is equivalent to a switch between the vent hole 31 and the main airway of the respirator, when the electromagnetic valve 300 is closed, the main airway of the respirator and the vent hole 31 are correspondingly closed, and the respirator delivers gas to the patient through the main airway of the respirator according to a normal frequency.

When the electromagnetic valve 300 is opened, the main airway of the respirator is communicated with the vent hole 31 through the electromagnetic valve 300, when the voice coil motor is opened to drive the diaphragm 40 to move towards the first cavity 341, the airflow of the main airway can be sucked into the second cavity 331, and when the diaphragm 40 is driven to move back to the first cavity 341, the airflow in the second cavity 331 can be sent back to the main airway at a certain pressure, so that high-frequency airflow is provided for the main airway in the respirator.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A voice coil motor, comprising:

2. The voice coil motor of claim 1, wherein the plurality of wall slots extend through a peripheral wall of the bobbin about the bobbin axis;

alternatively, the interior of the bobbin is provided with an inner cavity around its axis so that the circumferential wall of the bobbin is hollow.

3. The voice coil motor of claim 2, wherein the support comprises a base and a sidewall, the sidewall is annularly arranged on the edge of the base, so that the base and the sidewall form a concave shape, and the bobbin is fixedly connected to the sidewall.

4. The voice coil motor of claim 3, wherein the stator has a sliding slot, the base has a shaft core adapted to be inserted into the sliding slot, and the rotor is movably connected to the stator by inserting the shaft core into the sliding slot.

5. The voice coil motor of claim 4, wherein the stator further comprises a guide slot along a moving direction of the shaft core, and when the shaft core moves in the sliding slot, the coil assembly can be inserted into the guide slot.

6. The voice coil motor of claim 4, wherein an abutting portion is protruded at a position of the sliding groove at one end of the stator facing the bracket, and a flexible buffer member is disposed on the shaft core.

7. The voice coil motor of claim 1, wherein the outer wall of the stator is further provided with a heat sink.

8. An oscillator, comprising:

the air-conditioning device comprises a body, a plurality of air chambers and a plurality of air outlets, wherein the body is internally provided with a closed air chamber, the body is provided with air holes and air outlets which are arranged at intervals, and the air holes and the air outlets are used for communicating the air chambers with the outside;

a voice coil motor as claimed in any one of claims 1 to 7, mounted in the body for causing the diaphragm to vibrate.

9. The oscillator of claim 8, further comprising a pressure plate, wherein a middle portion of the diaphragm is located between the pressure plate and the mover, and the pressure plate is coupled to the mover by a screw to fix the middle portion of the diaphragm to the mover.

10. A ventilator, comprising:

a main body; and

the oscillator of any one of claims 8 to 9, mounted in the body.