Double-magnetic-steel voice coil motor

Abstract

The utility model relates to the technical field of voice coil motors, in particular to a double-magnetic-steel voice coil motor which comprises a shell, a shielding part and a magnetic assembly, the shell is provided with a sliding cavity, a heat dissipation hole and a first connecting hole, the heat dissipation hole penetrates through the shell and enables the heat dissipation hole to be communicated with the sliding cavity, the first connecting hole is located in the shell, the shielding part is rotationally installed on the shell, and the magnetic assembly is arranged on the shielding part. When the shielding piece rotates, the shielding piece covers or exposes each heat dissipation hole, the magnetic assembly comprises two pieces of magnetic steel, a magnetic pole and a coil framework, the magnetic pole is located between the two pieces of magnetic steel, the two faces of the magnetic pole are fixedly connected with the two pieces of magnetic steel respectively, the center of one end of the coil framework and the outer side wall of the coil framework are provided with a concave cavity and a winding groove respectively, and a coil is wound in the winding groove. According to the utility model, the heat dissipation holes are selectively covered by the shielding member, so that the heat dissipation holes are arranged at one end of the movable cavity, which is far away from the cavity opening, and the heat dissipation performance can be selectively improved according to the use situation.

Description

Technical Field

[0001] This application relates to the field of voice coil motor technology, and more specifically to a dual-magnet voice coil motor. Background Technology

[0002] Voice coil motors are a type of direct drive motor, characterized by simple structure, small size, high speed, and fast response. Their working principle is that the interaction between the energized coil and the internal magnetic group causes the moving parts inside the voice coil motor to perform linear or circular reciprocating high-frequency motion, and they are widely used in robotic arms.

[0003] There is a voice coil motor, such as Figure 1 As shown, the device includes a housing 90 and a magnetic assembly 91. The housing 90 has a sliding cavity 901 with an opening and several first connecting holes. The magnetic assembly 91 includes two magnets 911, a magnetic pole 912, and a coil frame 913. The magnetic pole 912 is located between the two magnets 911, and both sides of the magnetic pole 912 are fixedly connected to the two magnets 911 respectively. The coil frame 913 has a cavity and a winding groove at its center and outer side wall near the shielding member, respectively. A coil 914 is wound in the winding groove. The coil frame 913 is sleeved on the outside of the magnets 911 through the cavity. The other end of the coil frame 913 has several second connecting holes. It should be noted that the coil frame 913 is connected to the fixing member through the first connecting holes and to the actuating element through the second connecting holes. When the coil 914 is energized, the coil frame 913 reciprocates axially relative to the housing 90. However, since one end of the sliding cavity 901 is closed, and due to the presence of two magnets 911, the overall depth of the sliding cavity 901 is relatively deep. The coil 914 heats up after being energized, resulting in a higher air temperature closer to the bottom wall of the sliding cavity 901. Furthermore, during the movement of the coil frame 913, the end of the coil 914 closest to the bottom wall of the sliding cavity 901 remains within the sliding cavity 901, causing a higher temperature at that end or reducing the magnetic flux, thus affecting the overall performance of the voice coil motor.

[0004] Therefore, there is a need for a dual-magnet voice coil motor with a heat dissipation hole at the end of the sliding cavity away from the cavity opening, which can selectively improve heat dissipation performance according to the usage scenario. Summary of the Invention

[0005] The main objective of this application is to provide a dual-magnet voice coil motor, wherein the dual-magnet voice coil motor includes a housing, a shielding member, and a magnetic assembly. The housing has a sliding cavity with an opening, a plurality of heat dissipation holes, and a plurality of first connecting holes. The heat dissipation holes extend from the bottom wall of the sliding cavity toward the end opposite to the opening of the sliding cavity and penetrate the housing, communicating with the sliding cavity. The first connecting holes are located at the end of the housing with the heat dissipation holes. The shielding member is rotatably mounted on the end of the housing opposite to the opening of the sliding cavity. When the shielding member rotates, it covers or exposes each of the heat dissipation holes. The magnetic component includes two magnets, a magnetic pole, and a coil frame. The magnetic pole is located between the two magnets, and both sides of the magnetic pole are fixedly connected to the two magnets respectively. The coil frame has a cavity and a winding groove at the center and outer wall of one end near the shielding member, respectively. A coil is wound in the winding groove. The coil frame is sleeved on the outside of the magnet through the cavity. The other end of the coil frame has several second connection holes. The heat dissipation holes are selectively covered by the shielding member. Compared with the prior art, it has the advantage of having heat dissipation holes at the end of the sliding cavity away from the cavity opening, which can selectively improve heat dissipation performance according to the usage scenario.

[0006] Another objective of this application is to provide a dual-magnet voice coil motor, wherein the dual-magnet voice coil motor includes a plurality of snap-fit ​​structures, each snap-fit ​​structure being disposed at one end of the housing having the first connecting hole, each snap-fit ​​structure including a snap-fit ​​member, and the shielding member having a plurality of snap-fit ​​holes. When the shielding member rotates a predetermined angle, the snap-fit ​​member engages or disengages with the snap-fit ​​holes. When the snap-fit ​​member engages with the snap-fit ​​holes, each of the heat dissipation holes is exposed on the shielding member. By setting the snap-fit ​​structures, the shielding member is fixed after rotating a predetermined angle.

[0007] To achieve at least one of the above-mentioned objectives, this application provides a dual-magnet voice coil motor, wherein the dual-magnet voice coil motor comprises:

[0008] A housing having an open sliding cavity, a plurality of heat dissipation holes, and a plurality of first connecting holes, wherein the heat dissipation holes extend from the bottom wall of the sliding cavity toward an end opposite to the opening of the sliding cavity and penetrate the housing, and communicate with the sliding cavity; the first connecting holes are located at the end of the housing having the heat dissipation holes; and

[0009] A shielding member, rotatably mounted at one end of the housing opposite to the opening of the sliding cavity, wherein when the shielding member rotates, it covers or exposes each of the heat dissipation holes; and

[0010] A magnetic component includes two magnets, a magnetic pole, and a coil frame. The magnetic pole is located between the two magnets and its two sides are fixedly connected to the two magnets respectively. The coil frame has a cavity and a winding groove at the center and outer wall of one end near the shielding member, respectively. A coil is wound in the winding groove. The coil frame is sleeved on the outside of the magnet through the cavity. The other end of the coil frame has several second connecting holes.

[0011] In one or more embodiments of this application, the dual-magnet voice coil motor includes a plurality of snap-fit ​​structures. The snap-fit ​​structures are disposed at one end of the housing having the first connection hole. Each snap-fit ​​structure includes a snap-fit ​​member. The shielding member has a plurality of snap-fit ​​holes. When the shielding member rotates a predetermined angle, the snap-fit ​​member snaps into or separates from the snap-fit ​​holes. When the snap-fit ​​member snaps into the snap-fit ​​holes, the shielding member exposes each of the heat dissipation holes.

[0012] In one or more embodiments of this application, the housing has a plurality of receiving grooves at one end with the first connecting hole, and each of the snap-fit ​​structures further includes an elastic member. The snap-fit ​​member is slidably disposed in the receiving groove. The two ends of the elastic member are respectively connected to the snap-fit ​​member and the bottom wall of the receiving groove. The end of the snap-fit ​​member facing away from the elastic member has a ball head. When the elastic member is in an undeformed state, the ball head extends out of the groove opening of the receiving groove.

[0013] In one or more embodiments of this application, the housing has a through hole at the center of the end having the first connection hole.

[0014] In one or more embodiments of this application, the dual-magnet voice coil motor further includes a rotating shaft, a connecting plate, and a first torsion spring. The end of the through hole opposite to the magnetic component has a countersunk hole. The connecting plate is disposed in the countersunk hole and fixedly connected to the housing. The rotating shaft is rotatably mounted on the through hole, and after passing through the connecting plate, the rotating shaft is fixedly connected to the shielding member. The two ends of the first torsion spring are respectively connected to the connecting plate and the shielding member.

[0015] In one or more embodiments of this application, the dual-magnet voice coil motor further includes an indicator element, which is rotatably mounted on one end of the housing having the first connecting hole. The indicator element has a first indicator surface and a second indicator surface, which are arranged in a cross pattern. When the blocking member rotates by a predetermined angle, the indicator element is subjected to force and rotates by a predetermined angle, causing either the first indicator surface or the second indicator surface to face upwards. The first indicator surface and the second indicator surface are different colors.

[0016] In one or more embodiments of this application, the dual-magnet voice coil motor further includes a second torsion spring, the two ends of which are respectively connected to the schematic member and the housing.

[0017] In one or more embodiments of this application, the end of the housing having the first connecting hole also has two protrusions, each of which has a first connecting hole.

[0018] In this embodiment, the dual-magnet voice coil motor includes a housing, a shielding member, and a magnetic assembly. The housing has a sliding cavity, a heat dissipation hole, and a first connecting hole. The heat dissipation hole penetrates the housing and communicates with the sliding cavity. The first connecting hole is located at the end of the housing with the heat dissipation hole. The shielding member is rotatably mounted on the end of the housing away from the opening of the sliding cavity. When the shielding member rotates, it covers or exposes each heat dissipation hole. The magnetic assembly includes two magnets, a magnetic pole, and a coil frame. The magnetic pole is located between the two magnets, and both sides of the magnetic pole are fixedly connected to the two magnets respectively. The coil frame has a cavity and a winding groove at the center and outer wall of the end near the shielding member, respectively. A coil is wound in the winding groove. The coil frame is sleeved on the outside of the magnet through the cavity. The other end of the coil frame has several second connecting holes. The shielding member selectively covers the heat dissipation holes. Compared with the prior art, this method has the advantage of having a heat dissipation hole at the end of the sliding cavity away from the cavity opening, which can selectively improve heat dissipation performance according to the usage scenario. Attached Figure Description

[0019] These and / or other aspects and advantages of this application will become clearer and more readily understood from the following detailed description of embodiments of this application taken in conjunction with the accompanying drawings, wherein:

[0020] Figure 1 The diagram illustrates the structure of a conventional voice coil motor.

[0021] Figure 2 The figure shows a schematic diagram of the structure of a shielding component covering the heat dissipation hole of a dual-magnet voice coil motor at a certain angle according to this application;

[0022] Figure 3 The diagram shows... Figure 2 A rotated section view at CC;

[0023] Figure 4 The figure shows a schematic diagram of the structure of a shielding component exposing a heat dissipation hole at a certain angle in a dual-magnet voice coil motor according to this application;

[0024] Figure 5 The diagram shows a structural schematic of a voice coil motor with a double magnet at one end of the coil frame. Detailed Implementation

[0025] The terms and words used in the following specification and claims are not limited to their literal meaning, but are used solely by the inventors to enable a clear and consistent understanding of this application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of this application is provided for illustrative purposes only and not for the purpose of limiting the application as defined in the appended claims and their equivalents.

[0026] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0027] While ordinal numbers such as "first," "second," etc., will be used to describe various components, there is no limitation on which components are used herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the teachings of the utility model concept. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. It will also be understood that the terms “comprising” and / or “having” as used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.

[0029] Schematic illustration of a dual-magnet voice coil motor, reference. Figures 2 to 5According to a preferred embodiment of the present invention, a dual-magnet voice coil motor includes a housing 10, a shielding member 20, and a magnetic assembly 30. The housing 10 has a sliding cavity 101 with an opening, a plurality of heat dissipation holes 102, and a plurality of first connecting holes 103. The heat dissipation holes 102 extend from the bottom wall of the sliding cavity 101 toward the end opposite to the opening of the sliding cavity 101 and penetrate the housing 10, thereby communicating with the sliding cavity 101. The first connecting holes 103 are located at the end of the housing 10 with the heat dissipation holes 102. The shielding member 20 is rotatably mounted on the end of the housing 10 opposite to the opening of the sliding cavity 101. When the shielding member 20 rotates... The shielding member 20 covers or exposes each of the heat dissipation holes 102. The magnetic component 30 includes two magnets 301, a magnetic pole 302, and a coil frame 303. The magnetic pole 302 is located between the two magnets 301, and both sides of the magnetic pole 302 are fixedly connected to the two magnets 301 respectively. The coil frame 303 has a cavity 3031 and a winding groove 3032 at the center of one end near the shielding member 20 and on the outer side wall respectively. A coil (not shown in the figure) is wound in the winding groove 3032. The coil frame 303 is sleeved on the outside of the magnet 301 through the cavity 3031. The other end of the coil frame 303 has several second connecting holes 3033.

[0030] It should be noted that when the dual-magnet voice coil motor is not working or is operating at low intensity, the operator can cover the heat dissipation hole 102 with the shield 20 to prevent external dust or foreign objects from entering the sliding cavity 101 through the heat dissipation hole 102 and affecting the performance or use of the dual-magnet voice coil motor. However, when the dual-magnet voice coil motor is operating at high intensity for a long time, the operator can rotate the shield 20 to expose the heat dissipation hole 102, so that the outside air can exchange heat with the air near the bottom wall of the sliding cavity 101. Compared with the prior art, where the air at the bottom wall of the sliding cavity 101 can only flow to the cavity opening of the sliding cavity 101, which is farther away, and exchange heat, this application has the advantage of having a heat dissipation hole 102 at the end of the sliding cavity 101 away from the cavity opening, which can selectively improve the heat dissipation performance according to the usage scenario.

[0031] It should also be noted that the housing 10 is fixedly connected to the external fastener through the first connecting hole 103, and the coil frame 303 is fixedly connected to the external actuator through the second connecting hole 3033. When the coil is energized, the coil frame 303 will reciprocate within the sliding cavity 101 under the action of magnetic force, and drive the external actuator to move.

[0032] It should also be noted that the shielding member 20 normally covers the heat dissipation hole 102. In order to enable the shielding member 20 to expose the heat dissipation hole 102 without external force after rotating the shielding member 20 by a predetermined angle, the dual magnet voice coil motor includes several snap-fit ​​structures 40. The snap-fit ​​structures 40 are provided at the end of the housing 10 with the first connection hole 103. Each snap-fit ​​structure 40 includes a snap-fit ​​member 401. The shielding member 20 has several snap-fit ​​holes 201. When the shielding member 20 is rotated by a predetermined angle, the snap-fit ​​member 401 snaps into or separates from the snap-fit ​​hole 201. When the snap-fit ​​member 401 snaps into the snap-fit ​​hole 201, the shielding member 20 exposes each of the heat dissipation holes 102.

[0033] Specifically, the housing 10 has a plurality of receiving grooves 104 at one end of the first connecting hole 103. Each of the snap-fit ​​structures 40 further includes an elastic member 402. The snap-fit ​​member 401 is slidably disposed in the receiving groove 104. The two ends of the elastic member 402 are respectively connected to the snap-fit ​​member 401 and the bottom wall of the receiving groove 104. The end of the snap-fit ​​member 401 facing away from the elastic member 402 has a ball head 4011. When the elastic member 402 is in an undeformed state, the ball head 4011 extends out of the groove of the receiving groove 104.

[0034] It should be noted that, in this embodiment, the elastic element 402 is preferably a spring, the blocking element 20 has two snap-fit ​​holes 201, the number of snap-fit ​​structures 40 is two, the number of heat dissipation holes 102 is two, and both heat dissipation holes 102 are through-holes. The blocking element 20 is generally in the shape of an "I". When the operator rotates the blocking element 20 by a predetermined angle, the side wall of the blocking element 20 contacts the ball head 4011 of the snap-fit ​​element 401, and... When a downward force is applied to the ball head 4011, the snap-fit ​​member 401 is inserted into the receiving groove 104, so that the blocking member 20 can rotate further. When the blocking member 20 rotates further by a predetermined angle and the ball head 4011 is directly facing the snap-fit ​​hole 201, the ball head 4011 is snapped into the snap-fit ​​hole 201 under the elastic force of the elastic member 402, thereby fixing the position of the blocking member 20 so that the heat dissipation hole 102 can be exposed without external force.

[0035] Furthermore, to eliminate the possibility of a small protrusion at the center of the sliding cavity 101 during processing, which would hinder the bonding connection between the magnet 301 and the bottom wall of the sliding cavity 101, it should be noted that the magnet 301 and the magnetic pole 302 are also bonded together with adhesive. The housing 10 has a through hole 105 at the center of the end with the first connecting hole 103. By processing the through hole 105, the small protrusion at the center caused by processing is eliminated.

[0036] Furthermore, to ensure that the shielding member 20 normally covers the heat dissipation hole 102, the dual-magnet voice coil motor also includes a rotating shaft 501, a connecting plate 502, and a first torsion spring 503. The end of the through hole 105 facing away from the magnetic component 30 has a countersunk hole. The connecting plate 502 is disposed in the countersunk hole and fixedly connected to the housing 10. The rotating shaft 501 is rotatably mounted on the through hole 105 through a bearing, and the rotating shaft 501 is fixedly connected to the shielding member 20 after passing through the connecting plate 502. The two ends of the first torsion spring 503 are respectively connected to the connecting plate 502 and the shielding member 20.

[0037] In addition, the housing 10 has a protrusion 106 at one end of the first connection hole 103. When the shielding member 20 covers the heat dissipation hole 102, one side of the shielding member 20 abuts against the protrusion 106.

[0038] Furthermore, to remind the dual-magnet voice coil motor, an indicator element 60 is also included. The indicator element 60 is rotatably mounted on one end of the housing 10 having the first connecting hole 103. The indicator element 60 has a first indicator surface 601 and a second indicator surface 602, which are arranged in a cross pattern. When the blocking member 20 rotates by a predetermined angle, the indicator element 60 is subjected to force and rotates by a predetermined angle, causing either the first indicator surface 601 or the second indicator surface 602 to face upwards. The first indicator surface 601 and the second indicator surface 602 are different colors.

[0039] In addition, the dual-magnet 301 voice coil motor also includes a second torsion spring (not shown in the figure), the two ends of which are connected to the schematic member 60 and the housing 10, respectively.

[0040] It should be noted that the indicator component 60 is generally T-shaped. The first indicator surface 601 is located on one side of the vertical segment of the T, and the second indicator surface 602 is located on the top surface of the horizontal segment of the T. Under the torque of the second torsion spring, the indicator component 60 is normally arranged horizontally, with the first indicator surface 601 facing upwards and its color being green. When the operator rotates the cover component 20, the cover component 20 applies a force to one end of the indicator component 60 during rotation, causing it to flip. When the cover component 20 engages with the snap-fit ​​structure 40, the indicator component 60 rotates exactly 90°, causing the second indicator surface 602 to face upwards and its color to be red. When the operator stops the dual-magnet voice coil motor, the red second indicator surface 602 serves as a warning to rotate the cover component 20 so that it rotates under the torque of the first torsion spring 503 and covers the heat dissipation hole 102.

[0041] Furthermore, to avoid interference between the external fastener and the shielding member 20, the end of the housing 10 with the first connecting hole 103 also has two protrusions 107, each of which has a first connecting hole 103.

[0042] In summary, the dual-magnet voice coil motor described in the embodiments of this application is explained, which provides advantages such as a heat dissipation hole at the end of the sliding cavity away from the cavity opening, and the ability to selectively improve heat dissipation performance according to the usage scenario.

[0043] It is worth mentioning that, in this embodiment, the dual-magnet voice coil motor has a simple structure, does not involve complex manufacturing processes or expensive materials, and is highly economical. At the same time, for manufacturers, the dual-magnet voice coil motor provided in this application is easy to produce and inexpensive, which is more conducive to controlling production costs and further facilitates product promotion and use.

[0044] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from these principles.

Claims

1. A dual-magnet voice coil motor, characterized in that: The dual-magnet voice coil motor includes A housing having an open sliding cavity, a plurality of heat dissipation holes and a plurality of first connecting holes, wherein the heat dissipation holes extend from the bottom wall of the sliding cavity toward an end opposite to the opening of the sliding cavity and penetrate the housing, and the heat dissipation holes communicate with the sliding cavity, and the first connecting holes are located at the end of the housing having the heat dissipation holes; as well as A shielding member is rotatably mounted on one end of the housing away from the opening of the sliding cavity. When the shielding member rotates, it covers or exposes each of the heat dissipation holes. as well as A magnetic component includes two magnets, a magnetic pole, and a coil frame. The magnetic pole is located between the two magnets and its two sides are fixedly connected to the two magnets respectively. The coil frame has a cavity and a winding groove at the center and outer wall of one end near the shielding member, respectively. A coil is wound in the winding groove. The coil frame is sleeved on the outside of the magnet through the cavity. The other end of the coil frame has several second connecting holes.

2. The dual-magnet voice coil motor according to claim 1, characterized in that: The dual-magnet voice coil motor includes several snap-fit ​​structures. Each snap-fit ​​structure is located at the end of the housing with the first connecting hole. Each snap-fit ​​structure includes a snap-fit ​​member. The shielding member has several snap-fit ​​holes. When the shielding member rotates a predetermined angle, the snap-fit ​​member engages with or disengages from the snap-fit ​​holes. When the snap-fit ​​member engages with the snap-fit ​​holes, the shielding member exposes each of the heat dissipation holes.

3. The dual-magnet voice coil motor according to claim 2, characterized in that: The housing has a plurality of receiving grooves at one end with the first connecting hole. Each of the snap-fit ​​structures further includes an elastic member. The snap-fit ​​member is slidably disposed in the receiving groove. The two ends of the elastic member are respectively connected to the snap-fit ​​member and the bottom wall of the receiving groove. The end of the snap-fit ​​member facing away from the elastic member has a ball head. When the elastic member is in an undeformed state, the ball head extends out of the groove opening of the receiving groove.

4. The dual-magnet voice coil motor according to claim 2, characterized in that: The housing has a through hole at the center of the end with the first connecting hole.

5. The dual-magnet voice coil motor according to claim 4, characterized in that: The dual-magnet voice coil motor further includes a rotating shaft, a connecting plate, and a first torsion spring. The end of the through hole opposite to the magnetic component has a countersunk hole. The connecting plate is disposed in the countersunk hole and fixedly connected to the housing. The rotating shaft is rotatably mounted on the through hole, and after passing through the connecting plate, the rotating shaft is fixedly connected to the shielding member. The two ends of the first torsion spring are respectively connected to the connecting plate and the shielding member.

6. The dual-magnet voice coil motor according to claim 1, characterized in that: The dual-magnet voice coil motor also includes an indicator component, which is rotatably mounted on one end of the housing having the first connecting hole. The indicator component has a first indicator surface and a second indicator surface, which are arranged in a cross pattern. When the blocking component rotates by a predetermined angle, the indicator component is subjected to force and rotates by a predetermined angle, causing either the first indicator surface or the second indicator surface to face upwards. The first indicator surface and the second indicator surface are different colors.

7. The dual-magnet voice coil motor according to claim 6, characterized in that: The dual-magnet voice coil motor also includes a second torsion spring, the two ends of which are connected to the schematic component and the housing, respectively.

8. The dual-magnet voice coil motor according to claim 1, characterized in that: The end of the housing with the first connecting hole also has two protrusions, each of which has a first connecting hole.

Images