Double-coil voice coil motor

Abstract

The utility model relates to the technical field of stepping motors, in particular to a double-coil voice coil motor which comprises a shell, two sliding parts and two magnetic assemblies, the two ends of the shell are each provided with a first concave cavity, each first concave cavity is internally provided with one sliding part in a sliding mode, the opposite ends of the two sliding parts are each provided with a second concave cavity, and each second concave cavity is provided with a first magnetic assembly. A coil is arranged on the side face of each sliding part, a magnetic assembly is arranged in each first concave cavity and extends into the corresponding second concave cavity, each magnetic assembly comprises two magnetic steels and a magnetic pole, the two magnetic steels are located between the magnetic poles, and the two ends of the magnetic pole are connected with the two magnetic steels respectively; according to the utility model, the two coils share the housing area at the bottom wall of the first concave cavity, so that the motor is suitable for a plurality of execution objects, the installation space is small, and the motor structure is required to be more compact.

Description

Technical Field

[0001] The present application relates to the technical field of voice coil motors, and more specifically to a double-coil voice coil motor. Background Art

[0002] The voice coil motor is a direct drive motor with the characteristics of simple structure, small size, high speed and fast response. Its working principle is that the energized coil interacts with the internal magnetic group and makes the moving parts in the voice coil motor perform linear or circular reciprocating high-frequency motion. It is widely used in vibration tables or robotic arms.

[0003] Our company currently has a voice coil motor, such as Figure 1 As shown, it includes a shell 90, a sliding member 91 and a magnetic component 92. The shell 90 has a concave cavity 901. The sliding member 91 is slidably arranged in the concave cavity 901, and a coil 911 is sleeved on the sliding member 91. The sliding member 91 has a receiving cavity 912. One end of the magnetic component 92 is fixedly connected to the bottom wall of the concave cavity 901, and the other end of the magnetic component 92 extends into the receiving cavity 912. The shell 90 is connected to an external fixing member, and the sliding member 91 is connected to an external actuator. When the coil 911 is energized, the sliding member 91 reciprocates in the concave cavity 901 and drives the external actuator to move. However: In some situations where there are multiple execution objects and the installation space is narrow, the method of directly using two independent voice coil motors as described above is not compact enough and difficult to meet the installation requirements.

[0004] Therefore, there is a need to provide a dual-coil voice coil motor that is suitable for multiple execution objects and has a small installation space, and requires a more compact motor structure. Summary of the invention

[0005] The main purpose of the present application is to provide a dual-coil voice coil motor, wherein the dual-coil voice coil motor includes a shell, two sliding parts and two magnetic components, both ends of the shell have a first concave cavity, each of the first concave cavity has a sliding part slidably arranged, and the opposite ends of the two sliding parts have a second concave cavity, a coil is provided on the side of each sliding part, each of the first concave cavity has a magnetic component, and the magnetic component extends into the corresponding second concave cavity, each of the magnetic components includes two magnets and a magnetic pole, the two magnets are located between the magnetic poles, and the two ends of the magnetic pole are respectively connected to the two magnets, and the magnetic pole close to the bottom wall of the first concave cavity is connected to the shell, by making the two coils share the shell area at the bottom wall of the first concave cavity, compared with the prior art, it has the advantage of being suitable for installation scenarios with multiple execution objects and small installation space, requiring a more compact motor structure.

[0006] Another object of the present application is to provide a double-coil voice coil motor, wherein each of the magnetic components has a first through hole, and the first through hole extends from the end surface of one of the magnetic steels to the end surface of the other magnetic steel. The shell also has a second through hole, and the two ends of the second through hole are respectively connected to the two first concave cavities, and the first through hole is coaxially arranged with the second through hole. The bottom wall of each of the second concave cavities has a third through hole, and the third through hole is coaxially arranged with the first through hole. By providing the first through hole, the second through hole and the third through hole, it is helpful for the magnetic component to exchange heat with the outside air and facilitate the removal of overflowed glue.

[0007] In order to achieve at least one of the above-mentioned invention purposes, the present application provides a dual-coil voice coil motor, wherein the dual-coil voice coil motor comprises:

[0008] A shell, each of the two ends of the shell has a first cavity; and

[0009] Two sliding members, each of which has a sliding member slidably disposed in the first cavity, and each of the two sliding members has a second cavity at one opposite end, and a coil is disposed on the side of each sliding member; and

[0010] Two magnetic components, each of the first concave cavities is provided with a magnetic component, and the magnetic component extends into the corresponding second concave cavity, each of the magnetic components includes two magnets and a magnetic pole, the two magnets are located between the magnetic poles, and the two ends of the magnetic pole are respectively connected to the two magnets, and the magnetic pole close to the bottom wall of the first concave cavity is connected to the shell.

[0011] In one or more embodiments of the present application, each of the magnetic components has a first through hole, which extends from the end surface of one of the magnetic steels to the end surface of another magnetic steel. The shell also has a second through hole, and the two ends of the second through hole are respectively connected to the two first concave cavities, and the first through hole and the second through hole are coaxially arranged. The bottom wall of each of the second concave cavities has a third through hole, and the third through hole is coaxially arranged with the first through hole.

[0012] In one or more embodiments of the present application, each of the magnetic components also includes a connecting shaft, which passes through the first through hole, and one end of the connecting shaft is connected to the bottom wall of the first concave cavity, and the side surface of the connecting shaft is connected to the magnet and the magnetic pole.

[0013] In one or more embodiments of the present application, each of the connecting shafts has a through heat dissipation hole, and the heat dissipation hole is connected to the second through hole.

[0014] In one or more embodiments of the present application, each of the sliding members has an annular groove for placing the coil at one end close to the bottom wall of the first cavity.

[0015] In one or more embodiments of the present application, each of the sliding members further has a wire placement groove, which extends from one end of the sliding member away from the bottom wall of the first cavity toward the other end and is connected to the annular groove.

[0016] In one or more embodiments of the present application, one side of the shell has a plurality of first connection holes.

[0017] In one or more embodiments of the present application, the two ends of the magnetic pole are respectively bonded to the corresponding magnetic steel, and the hole wall of the first through hole is bonded to the side of the connecting shaft, and the magnetic steel near the bottom wall of the first concave cavity is bonded to the bottom wall of the first concave cavity.

[0018] In an embodiment of the present application, a dual-coil voice coil motor includes a shell, two sliding parts and two magnetic components, both ends of the shell have a first concave cavity, a sliding part is slidably arranged in each first concave cavity, and the opposite ends of the two sliding parts have a second concave cavity, a coil is provided on the side of each sliding part, a magnetic component is provided in each first concave cavity, and the magnetic component extends into the corresponding second concave cavity, each magnetic component includes two magnets and a magnetic pole, the two magnets are located between the magnetic poles, and the two ends of the magnetic pole are respectively connected to the two magnets, and a magnetic pole close to the bottom wall of the first concave cavity is connected to the shell, by making the two coils share the shell area at the bottom wall of the first concave cavity, compared with the prior art, it has the advantage of being suitable for installation scenarios with multiple execution objects and small installation space, requiring a more compact motor structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] These and / or other aspects and advantages of the present application will become clearer and easier to understand from the following detailed description of the embodiments of the present application in conjunction with the accompanying drawings, in which:

[0020] Figure 1 The figure shows a structural schematic diagram of an existing voice coil motor;

[0021] Figure 2 The figure shows a schematic structural diagram of a double-coil voice coil motor of the utility model from a certain viewing angle;

[0022] Figure 3 The figure shows a structural schematic diagram of a double-coil voice coil motor from another perspective. DETAILED DESCRIPTION

[0023] The terms and words used in the following specification and claims are not limited to the literal meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of the present application is provided for illustrative purposes only and not for the purpose of limiting the present application as defined by the appended claims and their equivalents.

[0024] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0025] Although ordinals such as "first," "second," and the like will be used to describe various components, those components are not limited 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 likewise, 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 associated listed items.

[0026] The terms used herein are only used for the purpose of describing various embodiments and are not intended to be limiting. As used herein, singular forms are intended to also include plural forms, unless the context clearly indicates an exception. In addition, it will be understood that the terms "including" and / or "having" when 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.

[0027] Application Overview

[0028] In some situations where there are multiple execution objects and the installation space is narrow, directly using two independent voice coil motors as described above is not compact enough and difficult to meet the installation requirements.

[0029] Based on the above technical problems, the present application proposes a dual-coil voice coil motor, wherein the dual-coil voice coil motor has a simple structure, does not involve complex manufacturing processes and expensive materials, and has high economy. At the same time, for manufacturers, the dual-coil voice coil motor provided by the present application is easy to produce and low-cost, which is more conducive to controlling production costs and further conducive to product promotion and use.

[0030] Schematic double coil voice coil motor,

[0031] refer to Figures 2 to 3 According to a preferred embodiment of the utility model, a double-coil voice coil motor includes a housing 10 , two sliding members 20 and two magnetic components 30 .

[0032] Specifically, Figure 2 As shown, both ends of the housing 10 have a first cavity 101, and each of the first cavity 101 has a sliding member 20 slidably disposed therein; in addition, a coil 201 is disposed on the side of each sliding member 20, and in order to realize that when the coil 201 is energized, it generates a magnetic field force with the magnetic component 30 and causes the sliding member 20 to move, the two sliding members 20 have a second cavity 202 at the opposite ends, and each of the first cavity 101 has a magnetic component 30, and one end of the magnetic component 30 is connected to the bottom wall of the first cavity 101, and the other end of the magnetic component 30 extends into the second cavity 202. More specifically, each of the magnetic components 30 includes two magnets 301 and a magnetic pole 302, the two magnets 301 are located between the magnetic poles 302, and the two ends of the magnetic pole 302 are respectively connected to the two magnets 301, and the magnetic pole 302 close to the bottom wall of the first cavity 101 is connected to the housing 10.

[0033] It should be noted that, under the magnetic force of the magnetic component 30, the outer wall of the sliding part 20 is spaced apart from the wall of the first cavity 101, and the wall of the second cavity 202 is spaced apart from the side of the magnetic component 30, thereby making the voice coil motor have the advantages of high speed, fast response, and no wear.

[0034] In addition, in order to realize the connection between the housing 10 and the external fixing member, as shown in FIG. Figure 2 As shown, one side of the housing 10 has a plurality of first connection holes 102, and the first connection holes 102 are located between the two first concave cavities 101; in addition, in order to realize the connection between each of the sliding members 20 and the external actuator, as shown in FIG. Figure 3 As shown, the side surface of each sliding member 20 has a plurality of second connection holes 203. When the coil 201 in the corresponding first cavity 101 is energized, the housing 10 is stationary, and the corresponding sliding member 20 reciprocates in the first cavity 101, driving the external actuator to move.

[0035] It is obvious that, compared with the voice coil motor with only a single coil in the prior art, if two independent single-coil voice coil motors are used, the thickness of the shell 10 of each single-coil voice coil motor at the bottom wall of the first cavity 101 is limited by the outer diameter of the first connecting hole 102 and is within a predetermined size. After placing two independent single-coil voice coil motors, the thickness at the bottom wall of the first cavity 101 is doubled, which leads to a longer overall length of the two independent single-coil voice coil motors. In the embodiment of the present application, in fact, the area of ​​the two coils 201 at the bottom wall of the first cavity 101 is shared, and the wall thickness only needs to be slightly larger than the outer diameter of the connecting hole. This makes the overall length of the double-coil voice coil motor shorter than that of the two independent single-coil voice coil motors, and the structure is more compact. Compared with the prior art, it has the advantage of being suitable for installation scenarios with multiple execution objects and small installation space, requiring a more compact motor structure.

[0036] Furthermore, in order to improve the heat dissipation capability of the magnetic component 30, as Figure 2 As shown, each of the magnetic components 30 has a first through hole 3011, and the first through hole 3011 extends from the end surface of one of the magnetic steels 301 to the end surface of another magnetic steel 301. The shell 10 also has a second through hole 103, and the two ends of the second through hole 103 are respectively connected to the two first concave cavities 101, and the first through hole 3011 and the second through hole 103 are coaxially arranged. The bottom wall of each of the second concave cavities 202 has a third through hole 2021, and the third through hole 2021 is coaxially arranged with the first through hole 3011.

[0037] It should be noted that, by providing the first through hole 3011 , the second through hole 103 and the third through hole 2021 , the heat emitted from the magnetic component 30 can be heat exchanged with the external air, thereby reducing the impact of high temperature on the performance of the magnetic component 30 .

[0038] Furthermore, since only one end of the magnetic component 30 is connected to the housing 10 and the other end is suspended, in order to increase the support force of the magnetic component 30, Figure 2 As shown, each of the magnetic components 30 further includes a connecting shaft 303, the connecting shaft 303 passes through the first through hole 3011, and one end of the connecting shaft 303 is connected to the bottom wall of the first cavity 101, and the side of the connecting shaft 303 is connected to the magnetic steel 301 and the magnetic pole 302. In addition, each of the connecting shafts 303 has a through heat dissipation hole 3031, and the heat dissipation hole 3031 is connected to the second through hole 103.

[0039] It should be noted that, in addition to relying on their own magnetic force to attract each other, the magnet 301 and the magnetic pole 302 are further bonded and connected by bonding, that is, the two ends of the magnetic pole 302 are respectively bonded and connected to the corresponding magnet 301; in addition, in order to achieve the connection between the magnet 301, the magnetic pole 302 and the connecting shaft 303, the hole wall of the first through hole 3011 is bonded and connected to the side of the connecting shaft 303; in addition, in order to achieve the connection between the magnet 301 and the shell 10, an end face of the magnet 301 close to the bottom wall of the first concave cavity 101 is bonded and connected to the bottom wall of the first concave cavity 101 by bonding.

[0040] It should be pointed out that, since the magnetic steel 301 is connected to the shell 10, and the magnetic steel 301 is also connected to the connecting shaft 303, the position of the connecting shaft 303 is actually fixed. However, in the actual processing process, in order to improve the connection strength, glue is also applied to the end surface of the connecting shaft 303 close to the bottom wall of the first concave cavity 101, and one end of the connecting shaft 303 is also bonded and connected to the shell 10.

[0041] It should also be pointed out that another purpose of providing the heat dissipation hole 3031, the third through hole 2021 and the first through hole 3011 is that when glue flows out into the hole wall of the heat dissipation hole 3031, the processing personnel can use tools such as air guns to remove the overflowed glue.

[0042] Further, to place the coil 201, as Figure 2 As shown, each of the sliding members 20 has an annular groove 203 for accommodating the coil 201 at one end close to the bottom wall of the first cavity 101 , and the coil 201 is wound in the corresponding annular groove 203 .

[0043] Further, in order to facilitate electrical connection with the coil 201, as Figure 2 and Figure 3 As shown, each of the sliding members 20 further has a wire placement groove 204 , which extends from one end of the sliding member 20 away from the bottom wall of the first cavity 101 to the other end and is connected to the annular groove 203 .

[0044] In summary, the dual-coil voice coil motor based on the embodiment of the present application is explained, which provides the dual-coil voice coil motor with advantages such as being suitable for multiple execution objects and having a small installation space, requiring a more compact motor structure, etc.

[0045] It is worth mentioning that in the embodiment of the present application, the dual-coil voice coil motor has a simple structure, does not involve complex manufacturing processes and expensive materials, and has high economic efficiency. At the same time, for manufacturers, the dual-coil voice coil motor provided by the present application is easy to produce and has low cost, which is more conducive to controlling production costs and further conducive to product promotion and use.

[0046] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A double coil voice coil motor, characterized in that: The double-coil voice coil motor comprises A shell, each of the two ends of the shell has a first cavity; and Two sliding members, each of which has a sliding member slidably disposed in the first cavity, and each of the two sliding members has a second cavity at one opposite end, and a coil is disposed on the side of each sliding member; and Two magnetic components, each of the first concave cavities is provided with a magnetic component, and the magnetic component extends into the corresponding second concave cavity, each of the magnetic components includes two magnets and a magnetic pole, the two magnets are located between the magnetic poles, and the two ends of the magnetic pole are respectively connected to the two magnets, and the magnetic pole close to the bottom wall of the first concave cavity is connected to the shell.

2. The dual-coil voice coil motor according to claim 1, characterized in that: Each of the magnetic components has a first through hole, which extends from the end surface of one of the magnetic steels to the end surface of another magnetic steel. The shell also has a second through hole, and the two ends of the second through hole are respectively connected to the two first concave cavities, and the first through hole and the second through hole are coaxially arranged. The bottom wall of each of the second concave cavities has a third through hole, and the third through hole is coaxially arranged with the first through hole.

3. The dual-coil voice coil motor according to claim 2, characterized in that: Each of the magnetic components also includes a connecting shaft, which passes through the first through hole, and one end of the connecting shaft is connected to the bottom wall of the first cavity, and the side surface of the connecting shaft is connected to the magnetic steel and the magnetic pole.

4. The double-coil voice coil motor according to claim 3, characterized in that: Each of the connecting shafts has a through heat dissipation hole, and the heat dissipation hole is connected to the second through hole.

5. The dual-coil voice coil motor according to any one of claims 1 to 4, characterized in that: Each of the sliding members has an annular groove for accommodating the coil at one end close to the bottom wall of the first cavity.

6. The double-coil voice coil motor according to claim 5, characterized in that: Each of the sliding members also has a wire placement groove, which extends from one end of the sliding member away from the bottom wall of the first cavity to the other end and is connected with the annular groove.

7. The double-coil voice coil motor according to claim 6, characterized in that: One side of the shell is provided with a plurality of first connection holes.

8. The double-coil voice coil motor according to claim 3 or 4, characterized in that: The two ends of the magnetic pole are respectively bonded to the corresponding magnetic steel, and the hole wall of the first through hole is bonded to the side of the connecting shaft, and the magnetic steel close to the bottom wall of the first concave cavity is bonded to the bottom wall of the first concave cavity.

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