JP5184845B2 - Camera motor - Google Patents

Description

  The present invention relates to a configuration of a motor, and more particularly to a camera motor.

  With the development of mobile phones that can shoot with digital cameras, digital cameras must evolve into smaller sizes. In the future, digital cameras will be widely applied to more electronic products.

  A conventional camera module includes a columnar frame, a motor provided inside the frame, and a lens body driven by the motor. The motor includes a permanent magnet that surrounds the lens body, and a coil set that is wound around the stator core. When electricity is applied to the coil, the lens body is moved by the magnetic force of the coil and the permanent magnet. A circuit board is provided on the flange portion of the frame, and an imaging sensor is provided on the circuit board. In the process of moving the lens body, the imaging sensor measures the clarity of the image, and the circuit board adjusts the coil current according to the feedback signal of the imaging sensor to adjust the focus. The coil set is provided with a guide terminal for electrically connecting the coil and the power source. Since the guide terminal is disposed on the side surface of the frame, the terminal on the side surface of the frame and the circuit board on the flange portion of the frame can be electrically connected through an external guide wire.

Since the camera module achieves motor assembly through an external guide wire, the structure is complicated, assembly time is increased, cost is increased, and automatic assembly is difficult to realize.

  In view of the above-described problems, an object of the present invention is to provide a camera motor that is convenient to be assembled with a systemized structure.

A base, a lens body housed in the base, and a motor for driving the lens body, the motor including at least one coil sheet wound with a coil;
In a camera motor including a magnet surrounding an outer peripheral surface of a lens body, the coil sheet is provided with two guide terminals for guiding a coil terminal, and the base is electrically connected to the coil terminal, Two connecting terminals are provided which extend outside the base.

  A sheet, a lens barrel, a lens provided inside the lens barrel, a magnet provided to surround the outer peripheral surface of the lens barrel, an upper coil sheet provided on both sides of the magnet, a lower coil sheet, In a camera motor including an upper coil and a lower coil wound respectively on an upper coil sheet and a lower coil sheet, the lower coil sheet is fixed on the sheet, and a positive and negative electrode of a power source is electrically connected to the sheet. A first connection terminal and a second connection terminal to be connected are respectively provided, and two terminals of each coil are electrically connected to the first connection terminal and the second connection terminal, respectively.

  In the camera motor according to the present invention, since the coil is electrically connected to the power source by the guide terminal of the coil sheet and the connecting terminal of the base, it can be avoided that the coil is electrically connected by other electric wires, and the camera motor is automatically operated. Manufacturing and assembling can be simplified.

  Hereinafter, the configuration of a specific embodiment according to the present invention will be described in detail with reference to the drawings.

  Referring to FIGS. 1 to 3, the camera motor is a camera motor that adjusts the focus in a two-stage manner by moving the lens between a near focus and a far focus. The camera motor includes a base 10, a lens body 50 housed in the base 10, and an upper coil sheet 30 and a lower coil sheet 40 provided on both upper and lower sides of the lens body 50. An upper coil 35 and a lower coil 45 are wound around the upper coil sheet 30 and the lower coil sheet 40, respectively.

The base 10 includes a sheet 15, a cover 60, and a frame 70. The sheet 15 is a cubic frame provided with an opening (not shown) in the middle. At the four corners of the sheet 15, protruding portions that protrude upward are formed. The two corners 11 and 12 of adjacent sheets 15 to each other, the through holes 111 and 121 for accommodating the communicating contact terminals 21 and 22 are respectively provided. The two connecting terminals 21 and 22 is formed in a Z-shape, and the intermediate portion 21b to be inserted into the through-holes 111, 121, and 22b, the upper and lower end portions which are projected to the outside of the through hole 111 (121) 21a (22a) and 21c (22c). The upper end portions 21a and 22a are formed in a flat sector shape, and the lower end portions 21c and 22c are formed in a long strip shape.

  Upper ends 21a and 22a of the two connecting terminals 21 and 22 that are electrically connected to the two coils 35 and 45 are disposed on the two corners 11 and 12, respectively. Since the lower end portions 21c and 22c are arranged under the sheet 15 and connected to a circuit board (not shown), the coils 35 and 45 and the circuit board can be electrically connected. The other corner 13 of the sheet 15 is provided with a blind hole 131 for mounting the bent connection terminal 23. That is, one end of the connecting terminal 23 is accommodated in the blind hole 131 and the other end is disposed on the corner 13 to be electrically connected to the coils 35 and 45. Projections 14 are formed on the outer edges of the corners 11, 12, 13.

  The frame 70 is a hollow columnar body. One corner of the frame 70 is formed with a guide angle that abuts against the inner wall of a corner (not shown) having no holes when the frame 70 is assembled on the sheet 15. The other three corners of the frame 70 are disposed on the protrusions 14 of the corners 11, 12 and 13 of the sheet 15, respectively. A space for accommodating the lens body 50, the upper coil sheet 30, and the lower coil sheet 40 is formed in the middle of the frame 70. The upper end of the frame 70 is covered with a cover 60 similar to the shape and size of the cross section of the frame 70. In the center of the cover 60, a circular hole (not shown) for extending and contracting the lens body 50 is provided.

  The upper coil sheet 30 and the lower coil sheet 40 are made of a magnetic material and include plate-like engaging portions 36 and 46 and annular coil portions 39 and 49, respectively. An upper coil 35 and a lower coil 45 are wound on the two coil portions 39 and 49. In this embodiment, the directions in which the two coils 35 and 45 are wound are contradictory. The two engaging portions 36 and 46 are generally rectangular, and a circular hole (not shown) is provided at the center thereof. The two coil portions 39, 49 are formed to extend from the inner edge of the circular hole in the axial direction, and two rectangular protrusions 494 protruding inward are formed symmetrically on the inner edge of the coil portion 49. Yes.

  The size of the engaging portion 46 of the lower coil sheet 40 is substantially the same as the size of the sheet 15. Four cutouts (not shown) adapted to the corners of the sheet 15 are formed at the four corners of the engaging portion 46, respectively. When the engaging portion 46 is assembled on the sheet 15, the cutouts are respectively engaged with the four corners of the sheet 15 and the lower coil sheet 40 is fixed on the sheet 15. . Two guide terminals formed integrally with the engaging portion 46 are formed at two adjacent corners of the engaging portion 46. That is, the outgoing terminal 43 and the incoming terminal 41 are formed in two adjacent corners, respectively. The shape of the engaging portion 36 of the upper coil sheet 30 is substantially the same as that of the cover 60. Two guide terminals are respectively formed at two opposite corners of the upper coil sheet 30. That is, the incoming line terminal 33 and the outgoing line terminal 32 are formed at two opposite corners, respectively. The guide terminals 32, 33, 41, 43 are long strips formed to extend at right angles to the engaging portions 36, 46, respectively.

  The lens body 50 is movably mounted between the upper coil sheet 30 and the lower coil sheet 40 and includes a lens barrel 51 and a lens 53. An inner thread is provided on the inner peripheral surface of the lens barrel 51, and an outer thread is also provided on the outer peripheral surface of the lens 53. The lens 53 is integrally fixed to the lens barrel 51 by screwing the inner thread of the lens barrel 51 and the outer thread of the lens 53 (see FIG. 4). A magnet 55 is provided around the outer peripheral surface of the lens barrel 51. Below the magnet 55, an annular convex edge 511 that supports the magnet 55 and separates the magnet 55 and the lower coil sheet 40 is formed so as to protrude integrally. Two tanks 514 are formed in the flange portion of the barrel 51 so as to be recessed in the axial center and symmetrical to each other. The positions and sizes of the two tanks 514 correspond to the protrusions 494 formed inside the coil portion 49 of the lower coil sheet 40. The position of the lens body 50 in the circumferential direction can be determined by the action of the protrusion 494 engaging the tank 514.

  Above the magnet 55, a ring-shaped spacer 57 made of copper or another nonmagnetic material and separating the magnet 55 and the upper coil sheet 30 is disposed. When the magnet 55 and the spacer 57 are fixed on the lens barrel 51 using an adhesive, the lens barrel 51, the lens 53, the magnet 55, and the spacer 57 are integrated. Then, while the camera motor is driven, the lens can be expanded and contracted to adjust the focus.

  3 is a perspective view showing that the camera motor of FIG. 2 without the frame 70 is assembled. 4 is a cross-sectional view taken along line IV-IV of the camera motor of FIG. As shown in FIGS. 3 and 4, when the camera motor is assembled, the coil sheet 30 and the coil sheet 40 are installed on the outer periphery of the lens barrel 51 and the upper and lower ends of the magnet 55, respectively. Then, the guide terminals 33 and 32 of the upper coil sheet 30 correspond to the corner portions 13 and 12 of the sheet 15, respectively, and the guide terminals 41 and 43 of the lower coil sheet 40 correspond to the corner portions 11 and 13 of the sheet 15. Correspond to each. One end of the upper coil 35 is wound around the incoming terminal 33 of the upper coil sheet 30, and the other end is wound around the outgoing terminal 32 of the upper coil sheet 30. One end of the lower coil 45 is wound around the incoming terminal 41 of the lower coil sheet 40, and the other end is wound around the outgoing terminal 43 of the lower coil sheet 40.

In addition, one end of the upper coil 35 wound around the outgoing wire terminal 32 is welded to the upper end portion 22a of the connecting terminal 22, and one end of the lower coil 45 wound around the incoming wire terminal 41 is connected to the upper end of the connecting terminal 21. It welds to the part 21a. The other end of the upper coil 35 and the other end of the lower coil 45 are all welded to the terminal 23, and the lower end portion 21c of the connecting terminal 21 and the lower end portion 22c of the connecting terminal 22 are respectively used as a cathode and an anode of a power source. Connect. Then, the upper coil 35 and the lower coil 45 constitute a series circuit.

Initially, when the lens body 50 is located at a near focus, the convex edge 511 of the lens barrel 51 is brought into contact with the coil portion 49 of the lower coil sheet 40, and the spacer 57 and the coil portion 39 of the upper coil sheet 30. A gap is formed between the two. The height of the gap is equal to the focal distance.

When the camera motor is energized, the winding directions of the coil 35 and the coil 45 are opposite to each other. Therefore, the polarities of the lower end of the upper coil 35 and the upper end of the lower coil 45 are the same. The polarity of the lower end of the lower coil 45 is the same. After energizing the camera motor, the upper end of the upper coil 35 and the lower end of the lower coil 45 become N poles, and the lower end of the upper coil 35 and the upper end of the lower coil 45 become S poles. When changed, the upper end of the upper coil 35 and the lower end of the lower coil 45 become S poles, and the lower end of the upper coil 35 and the upper end of the lower coil 45 become N poles.

In the present embodiment, it is assumed that the upper side of the magnet 55 is the N pole and the lower side is the S pole. When the upper coil 35 and the lower coil 45 are energized, the lower end of the upper coil 35 and the upper end of the lower coil 45 are all S poles. The S pole of the upper coil 35 and the N pole of the magnet 55 are attracted, and the S pole of the lower coil 45 and the S pole of the magnet 55 are repelled, so that the lens body 50 is moved from below to the far focus. The That is, after the motor moves the lens body 50 from the near focus to the far focus, the spacer 57 is brought into contact with the coil portion 39 of the upper coil sheet 30, and the convex edge 511 of the lens barrel 51 and the lower edge are contacted. Coil part 49 of coil sheet 40
A gap (position shown in FIG. 4) is formed between them.

When the lens body 50 is located at the far focus, the lens body 50 can be moved from the far focus to the near focus. When a current in which the directions of the upper coil 35 and the lower coil 45 are opposite to each other is applied, the lower end of the upper coil 35 and the upper end of the lower coil 45 all become N poles. The N pole of the upper coil 35 and the N pole of the magnet 55 repel each other, and the N pole of the lower coil 45 and the S pole of the magnet 55 attract each other, so that the lens body 50 is moved from the top to the bottom near focus. .

  Further, it may be assumed that the upper side of the magnet 55 is the S pole and the lower side is the N pole. At this time, when the upper coil 35 and the lower coil 45 are energized, the lower end of the upper coil 35 and the upper end of the lower coil 45 all become S poles. The S pole of the upper coil 35 and the S pole of the magnet 55 repel each other, and the S pole of the lower coil 45 and the N pole of the magnet 55 attract each other, so that the lens body 50 is moved from the top to the bottom near focus. . If currents having opposite directions are applied to the upper coil 35 and the lower coil 45, the lower end of the upper coil 45 and the upper end of the lower coil 45 are all N poles. The N pole of the upper coil 35 and the S pole of the magnet 55 are attracted, and the N pole of the lower coil 45 and the N pole of the magnet 55 are repelled, so that the lens body 50 is moved from the bottom to the far focus. The

  When the lens body 50 is placed at a far focus or near focus, the magnet 55 attracts the coil sheet 30 or the coil sheet 40 made of a magnetic material, so that the lens body 50 stops at this position even if a power failure occurs. Can be. Therefore, since it is not necessary to apply a current, power can be saved. In addition, since the spacer 57 and the convex edge 511 are provided, the magnet 55 can be prevented from coming into direct contact with the upper coil sheet 30 or the lower coil sheet 40. This is because it is avoided that the magnet 55 is in direct contact with the upper coil sheet 30 or the lower coil sheet 40 and is not easily separated by a large attractive force.

In the present embodiment, the upper coil sheet 30 and the lower coil sheet 40 include guide terminals 3
2, 33, 41, 43 are formed, and the connection terminal 21, 22 penetrating the sheet 15 is also formed in the sheet 15. The connection terminals 21 and 22 are extended to the outside of the sheet 15 and connected to a circuit board under the sheet 15. Since the terminals of the coils 35 and 45 are electrically connected to the circuit board by the terminals 32, 33, 41, 21 and 22, it is possible to avoid being electrically connected by other electric wires. Therefore, the camera motor can be manufactured automatically and the assembly process can be simplified.

  As described above, the upper coil sheet 30, the lower coil sheet 40, the upper coil 35, the lower coil 45, and the magnet 55 constitute a camera motor, and the upper coil sheet 30 and the lower coil sheet 45 The provided guide terminals 32, 33, 41, 43 are applied to a two-stage camera motor. Such guide terminals 32, 33, 41, 43 and connecting terminals 21, 22, 23 can also be applied to other motors such as stepping motors. At this time, the number and position of such terminals can be adjusted to a constant according to the arrangement of the coil sets and the electrical connection method. For example, as shown in FIG. 5, the coil 35 and the coil 45 can be connected in parallel, the position of the terminal of the coil and the terminal can be modified, and the connection between the terminal of the coil and the cathode or anode of the power source can be modified. .

  In the embodiment as shown in FIG. 5, the incoming terminal 33 a of the upper coil sheet 30 is provided at a corner corresponding to the corner 11 of the sheet 15, and the outgoing terminal 43 a of the lower coil sheet 40 is connected to the corner 12 of the sheet 15. Provide in the corresponding corner. One end of the upper coil 35 is wound around the outgoing line terminal 32 of the upper coil sheet 30, and the other end is wound around the incoming line terminal 33 a of the upper coil sheet 30. One end of the lower coil 45 is wound around the outgoing terminal 43 a of the lower coil sheet 40, and the other end is wound around the incoming terminal 41 of the upper coil sheet 40. The terminal of the upper coil 35 wound around the outgoing wire terminal 32 and the terminal of the lower coil 45 wound around the outgoing wire terminal 43 a are all welded onto the upper end portion 22 a of the connecting terminal 22. The terminal of the upper coil 35 wound around the incoming wire terminal 33 a and the terminal of the lower coil 45 wound around the incoming wire terminal 41 are all welded to the upper end portion 21 a of the connecting terminal 21. The lower ends 21c and 22c of the connection terminals 21 and 22 are connected to the cathode and the anode of the power source, respectively. Thus, the upper coil 35 and the lower coil 45 are configured in a parallel circuit. Such a connection method does not require the connection terminal 23, so that the structure of the camera motor can be simplified.

It is a disassembled perspective view of the best embodiment of the motor for cameras of the present invention. FIG. 3 is a three-dimensional assembly diagram of the camera motor shown in FIG. 1. It is a perspective view of a structure inside the motor for cameras shown in FIG. FIG. 4 is a cross-sectional view of the camera motor shown in FIG. 2 taken along line IV-IV. It is an intention to show the configuration of another embodiment of the camera motor of the present invention.

Explanation of symbols

10 base 11 corner 12 corner 13 corner 14 projecting portion 15 sheet 21 connecting terminal 21a upper end 21b intermediate portion 21c lower end portion 22 connecting terminal 22a upper end portion 22b intermediate portion 22c lower end portion 23 connecting terminal 30 upper coil sheet 32 outgoing line Terminal 33 Incoming terminal 33a Incoming terminal 35 Upper coil 36 Engaging part 39 Coil part 40 Lower coil sheet 41 Incoming terminal 43 Outgoing terminal 43a Outgoing terminal 45 Lower coil 46 Engaging part 49 Coil part 50 Lens body 51 Lens tube 53 Lens 55 Magnet 57 Spacer 60 Cover 70 Frame 111 Through hole 121 Through hole 131 Blind hole 494 Projection 511 Convex edge 514 Tank

Claims (10)

A base, a lens body housed inside the base, and a motor for driving the lens body,
The base includes a sheet disposed at a lower portion thereof, and a frame provided on the sheet,
The motor is a camera motor including at least one coil sheet around which a coil is wound and a magnet surrounding an outer peripheral surface of the lens body.
The coil sheet is provided with two guide terminals for guiding the terminal of the coil,
In the base, two connecting terminals are formed that are electrically connected to the terminal of the coil and extend outside the base,
The two connecting terminals are respectively provided on the sheet so as to be electrically connected to positive and negative electrodes of a power source,
The motor includes a first coil sheet and a second coil sheet provided on both sides of the magnet,
A first coil and a second coil are wound around the first coil sheet and the second coil sheet,
The connecting terminals that are electrically connected to one end of the two coils are disposed at two corners of the sheet, respectively.
3. The camera motor according to claim 1, wherein a third terminal that is electrically connected to the other end of the two coils is provided at the other corner of the sheet.   2. The camera motor according to claim 1, wherein a terminal of each coil is electrically connected to each of the two connecting terminals. Two through holes for accommodating the two connecting terminals are provided at two corners of the sheet corresponding to the connecting terminals,
The camera motor according to claim 1, wherein a blind hole for mounting the third terminal is provided at a corner corresponding to the third terminal. One guide terminal of each coil sheet corresponds to the third terminal,
2. The camera motor according to claim 1, wherein the other guide terminals respectively correspond to the two connecting terminals. Two guide terminals of the first coil sheet correspond to two adjacent corners of the sheet, respectively.
5. The camera motor according to claim 4, wherein the two guide terminals of the second coil sheet respectively correspond to two opposing corners of the sheet. The coil sheet is
An engaging portion;
A coil portion formed extending from the engagement portion,
The camera motor according to claim 1, wherein the guide terminal is formed to extend at right angles from the engaging portion. The base is
Sheet,
A cover,
A frame provided between the seat and the cover,
Protruding portions that protrude upward are formed at the four corners of the sheet,
The camera motor according to claim 6, wherein the four corners of the frame engage with the four corners of the sheet, respectively. The engagement portion of the coil sheet is formed in a rectangular shape,
The camera motor according to claim 7, wherein notches that engage with the four corners of the sheet are formed at the four corners of the engaging portion.   2. The camera motor according to claim 1, wherein each connecting terminal is formed in a Z shape and includes two end portions and a connecting portion connecting the two end portions. A base, a lens barrel accommodated in the base, a lens provided in the lens barrel, a magnet surrounding the outer peripheral surface of the lens barrel, and upper coil sheets provided on both sides of the magnet, respectively A camera coil including a lower coil sheet, an upper coil wound around the upper coil sheet and the lower coil sheet, and a lower coil,
The base includes a sheet disposed at a lower portion thereof, and a frame provided on the sheet,
The lower coil sheet is fixed on the sheet,
The sheet is provided with a first connection terminal and a second connection terminal that are electrically connected to positive and negative electrodes of a power source, respectively.
Two terminals of each coil are electrically connected to the first connection terminal and the second connection terminal, respectively;
The upper coil sheet is provided with two guide terminals for respectively guiding the two terminals of the upper coil,
Two ends of the upper coil are respectively wound around two guide terminals of the upper coil sheet,
The lower coil sheet is provided with two guide terminals for guiding the two terminals of the lower coil,
Two terminals of the lower coil are respectively wound around two guide terminals of the lower coil sheet,
The sheet is provided with a third connecting terminal,
The first connecting terminal is electrically connected to one end of the lower coil;
The second connecting terminal is electrically connected to one end of the upper coil;
The camera motor, wherein the third connecting terminal is electrically connected together to the other end of the upper coil and the other end of the lower coil.

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