KR102560336B1 - Vcm actuator with an opening - Google Patents

Abstract

The present invention relates to a VCM actuator having an opening.
The present invention, a fixed body in which a magnetic body having a hollow therein is accommodated; a movable body having a built-in coil member inserted into the hollow of the magnetic body; and a sliding coupling portion coupling the fixed body and the movable body and guiding movement of the movable body with respect to the fixed body, wherein the fixed body includes an opening provided at a front side portion, and the front side of the movable body is opened.

Description

VCM actuator having an opening {VCM ACTUATOR WITH AN OPENING}

The present invention relates to a VCM actuator with an opening.

A VCM actuator is an actuator using a voice coil motor (VCM), and is generally used where it is connected to a camera lens and the like to move the camera lens.

The above VCM uses Fleming's left hand rule, and therefore includes a magnetic material and a coil through which current flows.

That is, a device connected to the coil may linearly move by applying current to the coil, and a device connected to the coil may reciprocate by changing the direction of the current.

On the other hand, prior art Patent Publication No. 10-2007-0084961 (hereinafter referred to as the prior art) relates to a camera module package and a VCM type actuator used therein, and more specifically, to a lens unit; a bobbin coupled to the lens unit and having a guide hole; a plurality of magnets attached to the bobbin; a coil-yoke assembly installed to be spaced apart from the bobbin and magnet assembly; a holder coupled to an outer circumferential surface of the coil-yoke assembly; a lower case coupled to the holder and provided with a guide shaft inserted into a guide hole formed in the bobbin; And coupled to the lower part of the lower case, by including an image sensor module for capturing an image passing through the lens unit, it can be operated with a simple control method, the manufacturing process is simple, and the manufacturing cost can be reduced. In addition, the drop reliability is improved, and the magnetic efficiency and driving sensitivity performance are excellent.

However, this prior art has problems such as making it difficult to observe the inner space of the case with the naked eye, including a case (shield case) including a member such as a side plate surrounding a magnetic body (magnet), such as the holder 223.

The present invention has been made to solve the above problems, and provides a VCM actuator having an opening that adds straightness to a coil member moving with respect to a magnetic body, but allows easy observation of the magnetic body and the coil member with the naked eye.

Another object of the present invention is to provide a VCM actuator having an opening capable of suppressing head protrusion of a coupling member.

The present invention for the purpose of solving the above problems has the following configuration and characteristics.

A fixed body in which a magnetic body having a hollow inside is accommodated; a movable body having a built-in coil member inserted into the hollow of the magnetic body; and a sliding coupling portion coupling the fixed body and the movable body and guiding movement of the movable body with respect to the fixed body, wherein the fixed body includes an opening provided at a front side portion, and the front side of the movable body is opened.

In addition, the movable body may include left and right side plates, top plates and rear plates, and the sliding coupling part may be provided on the left and right side plates.

In addition, a coupling groove for inserting a coupling member is provided in the upper portion of the side plate, and a through hole through which the coupling member passes is provided in the upper plate, and the through hole is formed on the upper surface plate. It may have a shape corresponding to the head of the coupling member.

The present invention having the above configuration and characteristics has an effect of adding straightness of the coil member moving with respect to the magnetic body, but enabling easy observation of the magnetic body and the coil member with the naked eye.

In addition, the present invention has the effect of suppressing the protrusion of the head of the coupling member.

1 is a photograph for explaining a VCM actuator according to an embodiment of the present invention.
2 is a rear perspective view for explaining a VCM actuator according to an embodiment of the present invention.
3 is a view for explaining a state in which the movable body moves upward in FIG. 1;
4 is a view for explaining the first guiding means and the second guiding means.
5 is a diagram for explaining an additional embodiment of the present invention.

Since the present invention can have various changes and various forms, the implementation examples (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to a specific form disclosed, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and scope of the present invention.

Terms used in this specification are only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as ~comprises~ or ~consisting of are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but it should be understood that the existence or addition of one or more other features or numbers, steps, operations, components, parts, or combinations thereof is not excluded in advance.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application.

~First~, ~Second~, etc. described in this specification will only be referred to to distinguish different components from each other, regardless of the manufacturing order, and the names in the detailed description and claims of the invention may not match.

Throughout the present specification, when a part is said to be “connected” to another part, this includes not only the case of being “directly connected” but also the case of being “indirectly connected” with another element interposed therebetween.

1 is a photograph for explaining a VCM actuator according to an embodiment of the present invention. 2 is a rear perspective view for explaining a VCM actuator according to an embodiment of the present invention. 3 is a view for explaining a state in which the movable body moves upward in FIG. 1; 4 is a view for explaining the first guiding means and the second guiding means.

The VCM actuator (A) (VCM actuator having an opening) according to an embodiment of the present invention is intended to easily observe the internal device, and hereinafter, for convenience of description, will be referred to as the 'this device'.

1 to 4, the present device (VCM actuator (A) according to an embodiment of the present invention) includes a fixed body (1), a movable body (2) and a sliding coupling.

The fixed body 1 is to accommodate a magnetic body 5 having a hollow therein. The fixing body 1 may illustratively have a case shape in which a space is formed therein, an opening is formed in at least one of the front and rear, and the top is open.

Here, front means a left direction with reference to FIG. 4 , and rear means a right direction with reference to FIG. 4 , and the same will be applied in the following description.

More specifically, the fixing body 1 may include a pair of side wall parts 13, a front side part 12 connecting the front ends of the pair of side wall parts 13, and a rear side part disposed on the opposite side of the front side part 12 and connected to the rear end of the side wall part 13.

In addition, the fixing body 1 may include a pair of side wall portions 13 and a bottom portion connecting the lower end of the rear side portion of the front side portion 12 .

The fixing body 1 may have a case shape with an upper side open. The magnetic body 5 may be connected to the inside of the fixing body 1 by various known methods (eg, bolt coupling).

The movable body 2 has a built-in coil member 6 inserted into the hollow of the magnetic body 5. It may be a case in which a space is formed inside the movable body 2 and an opening is formed at at least one of the front and the rear, and the movable body 2 may have an open bottom unlike the fixed body 1.

More specifically, the movable body 2 may include a pair of side plates 21 and a rear plate 23 connecting rear ends of the pair of side plates 21 .

It may also include a top plate 22 connecting the upper ends of the pair of side plates 21 .

The above-described coil member 6 may be connected to an electric device so that current flows therethrough. The coil member 6 may be connected to the inside of the movable body 2 by various known methods (bolts, brackets, etc.).

Referring to FIGS. 3 and 4 , the sliding coupling unit couples the fixed body 1 and the movable body 2 and guides the movement of the movable body 2 relative to the fixed body 1 .

More specifically, the sliding coupling part may include a rail member 41 provided on one side surface (side wall portion 13) of the fixed body 1, protruding outwardly of the fixed body 1, and disposed vertically, and a second guide means 4 including a slide member 42 provided on an inner surface of the movable body 2 (inside the side plate 21) and moved by being constrainedly coupled with the rail member 41.

Illustratively, the rail member 41 may be an LM guide, and the slide member 42 may be a block that is coupled to the LM guide and reciprocates along the longitudinal direction (up and down direction) of the LM guide.

The rail member 41 may be provided on the outer surface of the fixed body 1, and the sliding member 42 may be connected to the inner surface of the movable body 2.

As described above, it is said that the lower part of the movable body 2 is open, and the fixed body 1 can be inserted through the lower opening of the movable body 2. 5) can be inserted into the inner hollow.

The above rail member 41 and the slide member 42 have been described by way of example, and are not limited to the above-described configuration, and may include various configurations as long as the movable body 2 is coupled to move up and down with respect to the fixed body 1.

In addition, the sliding coupling part may include a slide groove 31 formed on the side surface (side wall portion 13) of the fixed body 1 and a first guide means 3 including a slide portion (not shown) protruding inward from the inner surface of the movable body 2 to be inserted into the slide groove 31.

As described above, the fixed body 1 and the movable body 2 have internal spaces in which the magnetic body 5 and the coil member 6 are respectively installed. The inner side means the side forming the inner space in each body, and the outer side means the outer side.

The sliding groove 31 is formed recessed inward from the side surface (outer surface) of the fixing body 1, and may have a length in a vertical direction.

The slide part of the first guide means 3 protrudes inward from the inner surface and is inserted into the slide groove 31 . The slide part is provided on the inner surface of the movable body 2 and is not shown in the drawings.

For example, the slide part may be formed by casting when it is made of a metal material like the movable body 2, or formed by injection molding when it is made of a resin material and integrally formed with the movable body 2.

When a unidirectional current is applied to the coil member 6 disposed adjacent to the magnetic body 5, it moves upward to the coil member 6 according to Fleming's left-hand rule, so that the movable body 2 can move upward relative to the fixed body 1.

Of course, when current is applied to the coil member 6 in a direction opposite to the one direction, the coil member 6 can move downward.

Meanwhile, referring to FIGS. 1 and 3 , the fixing body 1 may include an opening 11 provided on the front side. The opening 11 may be a hole formed in the front side portion 12 .

Also, the movable body 2 may have an open front side. That is, as described above, the movable body 2 may include a rear plate 23 connecting the rear ends of the pair of side plates 21, but the front side connecting the front ends of the pair of side plates 21. Since there is no front plate, the front side can be opened.

As described above, since the fixed body 1 includes the opening 11 and the front side of the movable body 2 is opened, each of the magnetic body 5 and the coil member 6 embedded in and installed in the fixed body 1 and the movable body 2 can be easily observed with the naked eye and maintainability can be improved.

Illustratively, the opening 11 and the front side of the movable body 2 may be covered with a transparent member such as glass, and in another exemplary embodiment, they may be completely opened to improve maintainability.

The fixing body 1 improves the ease of observation of the magnetic body 5 through the opening 11, and can easily protect the magnetic body 5 from external substances by including the front side portion 12.

Referring to FIG. 2 , a coupling groove (not shown) for inserting a coupling member 7 (see FIG. 1 ) may be provided at an upper portion of the side plate 21 .

In addition, the top plate 22 is provided with a through hole 222 through which the coupling member 7 (body portion having a screw thread) passes, and the through hole 222 is formed on the top of the top plate 22 and may include a receiving groove 221 having a shape corresponding to the head of the coupling member 7 (a portion provided at the top of the body portion and having a larger width (outer diameter) than the body portion).

That is, the top plate 22 may include an accommodating groove 221 recessed from the top to the bottom, and the through hole 222 may be formed to penetrate the bottom of the accommodating groove 221 and the lower surface of the upper plate 22.

At this time, as described above, the receiving groove 221 may have a shape corresponding to the head so that the head is inserted and accommodated.

Through this, the head of the coupling member 7 coupling the top plate 22 and the side plate 21 is suppressed from protruding to the top of the top plate 22, thereby improving the aesthetics and preventing other members from being caught on the head. There is an advantage in that the head can be prevented from being damaged from the outside.

On the other hand, the device may include a waterproofing material (GS) and a functional additive (G) applied to the outer surface of the movable body (2).

The waterproof material GS is applied to the outer surface of the movable body 2 and may include 5 parts by weight of urethane (compared to 0.1 parts by weight of polyurethane foam described later). The waterproof material GS adds waterproofness to the movable body 2 by including urethane.

Referring to Figure 5, the functional additive (G) is a first buffer material (G1) containing 0.1 parts by weight of polyurethane foam; an endothelial material (G2) including 0.1 part by weight of polypropylene with respect to 0.1 part by weight of the polyurethane foam and surrounding the first cushioning material (G1); an outer cover material (G3) containing 0.1 part by weight of latex, wrapped around the inner cover material (G2), but having a fibrous shape, and mixed with the waterproof material (GS); a second cushioning material (G4) containing 0.2 parts by weight of tetradecane and disposed between the inner cover material (G2) and the outer cover material (G3); A plurality of posts (G5) including 0.1 part by weight of aluminum and provided on the outer side of the outer covering material (G3); a plurality of coupling members (G6) including 0.1 parts by weight of styrene butadiene rubber, provided on the outside of each of the plurality of posts (G5) and having a width decreasing toward the outside; an anionic polymer material (G7) containing 0.1 part by weight of p-styrenesulfonic acid (SSNa) and provided at either end of both ends of the outer covering material (G3); and a cationic material (G8) including 0.1 part by weight of polyethyleneimine and provided at the other end of both ends of the outer covering material (G3).

The weight parts of the functional additive (G), such as polypropylene, latex, tetradecane, aluminum, styrene butadiene rubber, p-styrenesulfonic acid, and polyethyleneimine, are described based on 0.1 parts by weight of the polyurethane foam.

As described above, the first cushioning material G1 includes polyurethane foam and is disposed inside an inner covering material G2 to be described later. Polyurethane foam is used in various fields and is porous, so it was used to add buffer and sound insulation in the functional additive (G).

The above polyurethane foam is preferably included in 0.1 parts by weight. If it is less than 0.1 parts by weight, the above buffering and soundproofing effects cannot be sufficiently expected, and if it exceeds 0.1 parts by weight, there is a risk of leaking from the inner cover material G2 by bursting the inner cover material G2 described later.

The inner skin material G2 is disposed inside the outer skin material G3 to be described later, and includes 0.1 parts by weight of polypropylene as described above and surrounds the first cushioning material G1.

If the polypropylene is less than 0.1 parts by weight, the first buffer material (G1) may not be sufficiently wrapped, and the first buffer material (G1) may be lost.

The polypropylene described above may be manufactured in the form of a film and wrap the first cushioning material G1 by a method such as thermal fusion in a state of wrapping the first buffering material G1. That is, the first cushioning material G1 may be disposed inside the inner covering material G2.

The outer skin material G3 is an extensible material containing 0.1 part by weight of latex, and may be fibrous while wrapping the inner skin material G2 (the inner skin material G2 and the second cushioning material G4 to be described later). The above covering material (G3) is mixed with the above waterproofing material (GS).

Since the outer covering material (G3) is fibrous, it is possible to add toughness to the functional additive (G).

As will be described in more detail later in the description, the second buffer material G4 is disposed between the outer cover material G3 and the inner cover material G2, so the outer cover material G3 can cover the second buffer material G4. By excessively increasing the weight of the additive (G), the dispersibility of the functional additive (G) may be reduced.

The second buffer material G4 contains 0.2 parts by weight of tetradecane and is disposed between the inner cover material G2 and the outer cover material G3.

Tetradecane is a Phase Change Material (PCM) with a melting point of about 4-6°C.

Phase change materials are energy storage materials that can actively store and release heat without external factors in the form of latent heat without temperature change when the phase changes according to the surrounding temperature.

In general, when a phase change occurs, latent heat, which is heat entering and leaving without a temperature change, has a significantly higher calorific value than sensible heat, which is heat entering and exiting with a temperature change without accompanying a phase change. Using this feature, it can be used to store a high amount of thermal energy or to maintain temperature.

In order to change the melting point, the second buffer material (G4) includes undecane, dodecane, tridecane, pentadecane, hexadecane, heptadecane, octadecane, nonadecane, and Eicosane in addition to tetradecane. ane) and triacontane. The melting point of the second buffer material G4 may be controlled within the range of 1 to 30° C., which is room temperature.

The second cushioning material G4 may cover the inner covering material G2 in a solid state and may be accommodated inside the outer covering material G3. The latex may wrap the second cushioning material G4 in a solid state on a sheet and be fixed by various known methods such as adhesive or fusion (thermal fusion) to cover the second cushioning material G4.

The above-described first cushioning material G1 may contract or expand as the temperature changes, and in particular, the volume of air accommodated in the pores may also contract or expand. When the first shock absorbing material G1 is contracted, the shock absorbing effect of mitigating shock is reduced.

At this time, the second cushioning material G4 supplies latent heat to the first buffering material G1 to suppress thermal contraction of the second buffering material G4, thereby suppressing deterioration of the buffering properties of the second buffering material G4.

In addition, since the second cushioning material G4 absorbs external heat, the first buffering material G1 expands as the temperature rises, damages the inner covering material G2, and can be suppressed from being discharged to the outside.

As described above, the second buffer material G4 has a melting point of 4 to 6 ° C., so that the waterproof material GS can be prevented from falling below 0 ° C., thereby preventing dew condensation, and the waterproof material GS can be prevented from being wrinkled or cracked.

It is preferable that the second buffer material G4 is disposed on the outside of the first buffer material G1. Since the first buffer material G1 has thermal insulation performance, the second buffer material G4 is disposed inside the first buffer material G1. When disposed inside, it is difficult to expect the above-described effect by interfering with heat exchange between the waterproof material GS and the second buffer material G4.

As described above, the second buffer material (G4) includes 0.2 parts by weight of tetradecane. If it is less than 0.2 parts by weight, it is difficult to expect a heat buffering effect, and if it exceeds 0.2 parts by weight, it is difficult to be disposed inside the outer covering material (G3).

The anionic polymer material (G7) is provided at either end (the left end in FIG. x) of both ends of the outer shell (G3), and may include p-styrenesulfonic acid, and may further include a hydrogel pre-polymer. The anionic polymer material (G7) may be a mixture of p-styrenesulfonic acid and a hydrogel pre-polymer (1:19 ratio) and UV curing.

P-styrenesulfonic acid is preferably included in an amount of 0.1 part by weight, but when less than 0.1 part by weight is used, the negative charge is not sufficient, and when it exceeds 0.1 part by weight, the weight of the functional additive (G) is excessively increased to reduce dispersibility. There is a problem.

The cationic material G8 may be provided at the other end (right end in FIG. x) of both ends of the cover material G3.

Polyethyleneimine included in the cationic material (G8) is a polymer polymerized with ethyleneimine and is known to have the highest cation density among existing materials.

Illustratively, each of the cationic material (G8) and the anionic polymer material (G7) may be thermally fused with the outer cover material (G3) in a state of being stacked on a polyethylene (PE) film or latex, or attached by an adhesive, etc., and provided on the outside of the outer cover material (G3).

The posts G5 include 0.1 part by weight of aluminum, but are provided on the outside of the cover material G3, may have a column shape, and may be arranged in plurality at predetermined intervals on the outer surface of the cover material G3. Aluminum is used because it is a light metal, and when it exceeds 0.1 parts by weight, the functional additive (G) becomes too heavy and dispersibility deteriorates, and when it is less than 0.1 parts by weight, its length or width is excessively reduced, resulting in reduced durability.

Illustratively, the inner end of the post G5 may be attached to the outer side of the outer covering material G3 by a known adhesive or the like. As another example, the outer cover material (G3) may be formed with a fitting groove formed recessed inward from the outer surface, and the inner end of the post (G5) may be inserted into the fitting groove and fitted.

Each of the plurality of coupling members (G6) is provided on the outside of each of the plurality of posts (G5), but the width may decrease toward the outside.

Here, the inner side may mean the center side of the functional additive (G), and the outer side may mean the radial direction side from the center side.

A plurality of units (GU) of the functional additive (G) may be included in the waterproofing material (GS). When stirring in the waterproofing material (GS), neighboring units (GU) are separated by shear force. The agitation of the waterproofing material (GS), functional additives (G) and other additives can be improved.

After mixing or in the process of applying the waterproofing material (GS) to the movable body (2) or after being applied to the movable body (2), the adjacent units (GU) are brought closer to each other by the electrostatic attraction between the anionic polymer material (G7) and the cationic material (G8), and any one of the adjacent units (GU) (hereinafter referred to as the first unit) is elastically deformed (compressed) by the coupling member (G6) containing styrene butadiene rubber (SBR). deformed) to enter between the plurality of coupling members G6 provided on the outside of the other one of the adjacent unit bodies GU (hereinafter referred to as the second unit body).

When the coupling member G6 of the first unit passes between the coupling members G6 of the second unit, the anionic polymer material G7 of the first unit and the cationic material G8 of the second unit can be attached to each other by electrostatic attraction, and the coupling member G6 of the first unit can be elastically restored to have an original shape in which the width decreases toward the outside.

At this time, the inner end of the coupling member G6 of the first unit unit and the inner end of the coupling member G6 of the second unit body are mutually supported and hung (interlocking coupling), so that the first unit unit and the second unit unit are prevented from being separated from each other, and the adjacent unit units GU are mutually coupled, and the expansion of the waterproof material GS by heat is suppressed by the electrostatic attraction of the neighboring unit units GU, and toughness can be added to the waterproof material GS.

The present invention described above with reference to the accompanying drawings can be variously modified and changed by those skilled in the art, and these modifications and changes should be construed as being included in the scope of the present invention.

VCM Actuator: A
Fixed Body: 1 Opening: 11
Front side part: 12 Side wall part: 13
Movable body: 2 Side plate: 21
Top plate: 22 Accommodation groove: 221
Through hole: 222 Rear plate: 23
1st guide means: 3 slide grooves: 31
Second guide means: 4 rail members: 41
Slide member: 42 Magnetic body: 5
Coil member: 6 Combination member: 7

Claims (4)

A fixed body in which a magnetic body having a hollow inside is accommodated;
a movable body having a built-in coil member inserted into the hollow of the magnetic body; and
a sliding coupling portion coupling the fixed body and the movable body and guiding movement of the movable body relative to the fixed body;
including,
The fixed body includes an opening provided on the front side, and the movable body has an open front side,
The movable body includes left and right side plates, top plates and rear plates, and the sliding coupling part is provided on the left and right side plates,
An upper portion of the left and right side plates is provided with a coupling groove for inserting a coupling member,
The upper plate is provided with a through hole through which the coupling member passes,
The through hole is formed in the receiving groove formed on the top of the top plate and having a shape corresponding to the head of the coupling member,
A waterproof material (GS) and a functional additive (G) applied to the outer surface of the movable body, wherein the waterproof material (GS) is applied to the outer surface of the movable body,
The functional additive (G) is,
A first cushioning material (G1) containing 0.1 parts by weight of polyurethane foam;
an endothelial material (G2) including 0.1 part by weight of polypropylene with respect to 0.1 part by weight of the polyurethane foam and surrounding the first cushioning material (G1);
an outer cover material (G3) containing 0.1 part by weight of latex, wrapped around the inner cover material (G2), but having a fibrous shape, and mixed with the waterproof material (GS);
a second cushioning material (G4) containing 0.2 parts by weight of tetradecane and disposed between the inner cover material (G2) and the outer cover material (G3);
A plurality of posts (G5) including 0.1 part by weight of aluminum and provided on the outer side of the outer covering material (G3);
a plurality of coupling members (G6) including 0.1 parts by weight of styrene butadiene rubber, provided on the outside of each of the plurality of posts (G5) and having a width decreasing toward the outside;
an anionic polymer material (G7) containing 0.1 part by weight of p-styrenesulfonic acid (SSNa) and provided at either end of both ends of the outer covering material (G3); and
A cationic material (G8) containing 0.1 part by weight of polyethyleneimine and provided at the other end of both ends of the outer covering material (G3);
including,
The waterproofing material (GS) is a VCM actuator, characterized in that it comprises 5 parts by weight of urethane.
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