JP4640299B2 - Lens barrel - Google Patents

Description

  The present invention relates to a lens barrel including an electric substrate on which an electric component is mounted.

FIG. 7 is a diagram showing the first prior art.
The main CPU 116 is an in-lens CPU mounted on the electric board 110, in which a drive control program such as a motor or a data communication program is written.
The fixed cylinder 101A is formed so that the main CPU 116 and the inner wall do not interfere with each other by increasing the outer diameter.

FIG. 8 is a diagram showing a second prior art.
The connector 113 is a connection terminal mounted on the electric board 110. By connecting an FPC as shown in FIG. 8, a main CPU (not shown) or a non-volatile memory (not shown) is connected from a personal computer provided outside. Various programs or data can be written in the means.

In the above-described lens barrel according to the second prior art, it is necessary to remove the mount 111 and expose the electric board 110 and the connector 113 when writing a program into the CPU or writing data into the nonvolatile storage unit. Since the mounting accuracy of the mount 111 is important in order to ensure the optical performance of the photographing optical system, when mounting the mount 111 after the writing of the program or the like is completed, the mounting accuracy must be confirmed again. There was a problem that the assembly process increased and the cost was increased. This problem also occurs at the same time during repair.

An object of the present invention is to provide a lens barrel capable of easily performing communication such as program writing with respect to a built-in electric component.

The present invention solves the above problems by the following means. In addition, in order to make an understanding easy, although the code | symbol corresponding to the Example of this invention is attached | subjected and demonstrated, it is not limited to this.
The invention according to claim 1 is an electric board (10) that is provided along a plane substantially orthogonal to the optical axis of the photographing optical system (L1 to L4) and the photographing optical system, and provided outside the optical path of the photographing optical system. ) And a substantially cylindrical member that covers the electric substrate and forms an outer appearance surface, and has an outer cylinder (1) having a hole (1a) opened at a position corresponding to at least a part of the electric substrate. And a connector (13) mounted on the electric board and at a position corresponding to the hole portion and outside the optical path of the photographing optical system, and detachably provided in the hole portion. And a lid (12) that covers a part of the outer cylinder in the circumferential direction and closes the hole in a state of being attached to the hole.

A second aspect of the present invention is the lens barrel according to the first aspect, wherein the connector (13) is used for writing a program to the main CPU (16).
A third aspect of the present invention is the lens barrel according to the second aspect, wherein the connector (13) is used for writing information to the nonvolatile storage means.
According to a fourth aspect of the present invention, in the lens barrel according to any one of the first to third aspects, the electric board is disposed so as to be disposed outside the optical path of the photographing optical system (L1 to L4). (10) An electric element (16) mounted on the electric board is provided, the electric element is provided on the first surface of the electric board, and the connector (13) is provided on the second surface of the electric board. The lens barrel is characterized in that it is provided.

According to a fifth aspect of the present invention, in the lens barrel according to the fourth aspect, the electric element (16) is provided at a position adjacent to the back of the connector (13) with the electric board (10) interposed therebetween. A lens barrel.
According to a sixth aspect of the present invention, in the lens barrel according to any one of the first to fifth aspects, the lid portion (12) also serves as at least one of a nameplate, an operation member, and a switch. This is a lens barrel characterized by that.
According to a seventh aspect of the present invention, in the lens barrel according to any one of the first to sixth aspects, the electric substrate (10) is arranged around an optical path of the photographing optical system (L1 to L4). A lens barrel characterized by being a hard substrate disposed.
Note that the configuration described with reference numerals may be modified as appropriate, and at least a part of the configuration may be replaced with another component.

According to the present invention, the following effects can be obtained.
According to the first aspect of the present invention, since the connector mounted on the electric board at a position corresponding to the hole and the lid for closing the hole are provided, the lens barrel can be assembled or repaired. Even if it exists, it is not necessary to remove a mount etc., and can communicate easily.

According to the invention of claim 2, since the connector is used for writing a program to the main CPU, the program can be written easily.
According to the invention of claim 3, since the connector is used for writing information to the nonvolatile storage means, various set values can be easily adjusted and changed.
According to the invention of claim 4, since the electric element is provided on the first surface of the electric board and the connector is provided on the second surface of the electric board, the electric element and the connector are close to each other. It can arrange | position to this, and can be set as the arrangement | positioning using the same hole.

According to the invention of claim 5, since the electric element is provided at a position near the back of the connector across the electric board, the size of the opening as the hole can be reduced.
According to the sixth aspect of the present invention, since the lid serves as at least one of the nameplate, the operation member, and the switch, it is possible to provide an inexpensive lens barrel without requiring new parts. Further, since the user is not allowed to recognize that a part to be a lid is attached, the appearance quality can be improved without being accidentally removed.
According to the invention of claim 7, since the electric substrate is a hard substrate disposed around the optical path of the photographing optical system, the total length of the lens barrel can be shortened, and the degree of integration can be increased to further reduce the size. Can be realized.

[Embodiment]
Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings.
FIG. 1 is a cross-sectional view of a lens barrel according to an embodiment of the present invention, taken along the main CPU 16.
The fixed cylinder 1 is a member that becomes a base that does not move regardless of the positions of the lens groups L1 to L4, and is an external appearance cylinder in which a part of the outer peripheral surface is exposed to the outside to form an external appearance surface.
The movable members 8 and 9 that can move in the optical axis direction are fitted on the inner peripheral side of the fixed cylinder 1, and the movable members 8 and 9 hold the lens groups L3 and L4, respectively. A moving member 7 that can move in a direction substantially orthogonal to the optical axis is held at the tip of the fixed cylinder 1, and the moving member 7 holds the lens group L <b> 2.

  Further, a cam ring 2 is fitted on the outer peripheral side of the fixed cylinder 1, and only rotation around the optical axis is allowed. A moving member 3 having a helicoid screw at the tip is fitted to the outer peripheral side of the cam ring 2, and a holding member 4 for holding the lens unit L1 is screwed through the helicoid screw.

  Further, a focus operation ring 5 and a zoom operation ring 6 are rotatably fitted to the fixed cylinder 1. When the focus operation ring 5 is rotated, the holding member 4 is rotated, and the lens group L1 is moved in the optical axis direction by the helicoid screw so that the subject can be focused. The focus operation ring 5 can be operated manually or can be driven by a lens drive motor (not shown). When the zoom operation ring 6 is rotated, the cam ring 2 is rotated by a connection key (not shown), and the lens groups L1, L3, and L4 are moved in the optical axis direction by the cam groove of the cam ring 2 and the rectilinear groove of the fixed cylinder. Scaling operation is possible.

  The lens group L2 is driven in a direction to cancel out camera shake detected by a camera shake detection sensor (not shown) and in a direction substantially orthogonal to the optical axis by a camera shake correction motor (not shown). The electric substrate 10 is a hard substrate that is fixed to the fixed cylinder 1 with screws 14 in a direction along a plane substantially orthogonal to the optical axis, and is arranged in a substantially annular shape (a so-called donut shape) around the optical path. By arranging the electric substrate 10 in a substantially annular shape as described above, the entire length of the lens barrel can be shortened. Further, by using a hard substrate, a further reduction in size can be realized by increasing the degree of integration as a multilayer structure substrate.

The electric board 10 includes a driving control circuit for a lens driving motor (not shown) that drives the lens group L1, a driving control circuit for a blur correction motor (not shown) that drives the lens group L2, and a camera (not shown). A circuit for data communication with the body is formed.
The mount 11 is fixed to the fixed cylinder 1 with a screw (not shown), and has a terminal (not shown) that performs data communication with a camera body (not shown).

FIG. 2 is a view showing a CC cross section in FIG.
As shown in FIGS. 1 and 2, a hole 1 a is provided at a position behind the fixed cylinder 1 (on the mount 11 side) and close to the electric substrate 10, and the switch block is used as a lid for closing the hole 1 a. 12 is detachably provided on the fixed cylinder 1. The switch block 12 is provided with a switch for switching between auto focus and manual focus, a switch for determining whether or not to perform camera shake correction, and the like.

The main CPU 16 is an in-lens CPU (electrical element) mounted on the surface (first surface) on the mount 11 side of the electric substrate 10, and a drive control program such as a motor and a data communication program are written therein. . The lens barrel in this embodiment includes an autofocus mechanism and a shake correction mechanism, and the main CPU 16 that performs these controls is between the inner wall of the fixed cylinder 1 and the optical path of the photographing optical system (L1 to L4). The outer shape is larger than the space provided in the.
The main CPU 16 is disposed on the electric board 10 in the vicinity of the hole 1a for the switch block 12 described above. Since the main CPU 16 has a large outer shape, the electric board 10 also has a protruding portion corresponding to the main CPU 16. The protruding portion is disposed so as to be inserted into the hole 1 a of the fixed cylinder 1.

  In the lens barrel according to the prior art described above, the fixed barrel 101A is disposed on the outer peripheral side of the projecting portion, leading to an increase in the size of the lens barrel. However, in the present embodiment, only the protruding portion of the electric board 10 is covered with the switch block 12. For this reason, the outer diameter of the lens barrel is increased only at the minimum necessary portion, thereby preventing the conventional lens barrel from becoming large. Further, since the switch block 12 is used to cover the cover, there is no need to add another member, and it does not appear unnaturally popping out.

FIG. 3 is a cross-sectional view of the embodiment of the lens barrel according to the present invention cut along the vicinity of the connector 13.
FIG. 4 is a view showing an AA section in FIG.
The connector 13 is a connection terminal member mounted on the subject-side surface (second surface) of the electric board 10 and is provided near the hole 1a. The connector 13 is a member that inserts an FPC (Flexible Printed Circuits) 15 (see FIGS. 5 and 6) when writing a program to the main CPU 16 and enables communication with the outside.
Further, in the present embodiment, the main CPU 16 and the connector 13 are provided at positions near the back (true back) of each other with the electric board 10 interposed therebetween. By arranging in this way, it is not necessary to enlarge the hole 1a or provide a sub-number.

5 and 6 are diagrams showing a state in which the program is written by inserting the FPC 15 into the connector 13 in FIGS.
In this embodiment, the connector 13 is exposed through the hole 1a and the FPC 15 can be easily inserted simply by removing the switch block 12. Therefore, since it is not necessary to modify the mount 11, the mounting accuracy attached in the process is maintained as it is, and readjustment and re-inspection after writing the program are unnecessary.

According to this embodiment, the switch block 12 covers only the protruding portion of the electric board 10 on which the CPU 16 is mounted. Therefore, the outer diameter of the lens barrel is increased only at the minimum necessary part, and the lens barrel can be reduced in size. Moreover, since it is covered with the switch block 12, it is not necessary to add another member, and the cost is not increased.
Furthermore, the program can be written only by removing the switch block 12, and the mount 11 need not be changed. For this reason, the attachment accuracy attached in the process can be maintained as it is, readjustment after program writing and re-inspection become unnecessary, and the cost can be reduced. Furthermore, when repairing, the workability is good and the repair can be made inexpensive.

[Deformation]
The present invention is not limited to the embodiment described above, and various modifications and changes are possible, and these are also within the equivalent scope of the present invention.
(1) In this embodiment, the hole 1a provided in the fixed cylinder 1 is an example of a hole for the switch block 12, and the present invention is not limited to this. That is, the present invention can be applied to any structure as long as the hole is structured so as to cover and cover other parts in the finished product state. For example, not a switch block but a product name plate or a non-slip rubber ring may be used.

(2) In the present embodiment, an example in which the main CPU 16 is provided as an electric element having a large shape has been described.
(3) In the present embodiment, the connector 13 has been described as a connector for writing a program and data to the main CPU 16, but the present invention is not limited to this. For example, data communication such as writing or reading data to an EEPROM or CPU It may be a connector for performing the above.
(4) In the present embodiment, the example in which the main CPU 16 and the connector 13 are provided separately on both surfaces of the substrate 10 near the hole 1a is shown. However, the present invention is not limited to this example. May be arranged, or another hole may be provided at a position different from the hole 1a. Further, only the main CPU 16 or only the connector 13 may be disposed near the hole 1a.

FIG. 3 is a cross-sectional view of an embodiment of a lens barrel according to the present invention cut along the vicinity of a main CPU 16. It is a figure which shows CC cross section in FIG. FIG. 3 is a cross-sectional view of an embodiment of a lens barrel according to the present invention, cut in the vicinity of a connector 13. It is a figure which shows the AA cross section in FIG. In FIG. 3, it is a figure which shows the state which inserts FPC15 in the connector 13 and has written the program. In FIG. 4, it is a figure which shows the state which inserts FPC15 in the connector 13 and has written the program. It is a figure which shows the 1st prior art. It is a figure which shows the 2nd prior art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Fixed cylinder: 1a Hole part: 2 Cam ring: 3, 7, 8, 9 Moving member: 4 Holding member: 5 Focus operation ring: 6 Zoom operation ring: 10 Electric board: 11 Mount: 12 Switch block: 13 Connector: 14 Screw: 15 FPC: 16 Main CPU: L1-L4 Lens group

Claims (7)

Photographic optics,
An electrical board provided along the plane substantially orthogonal to the optical axis of the photographing optical system and provided outside the optical path of the photographing optical system;
A substantially cylindrical member that covers the electrical substrate and forms an exterior surface, the exterior tube having a hole that is open at a position corresponding to at least a portion of the electrical substrate;
A connector that is mounted on the electrical board and at a position corresponding to the hole and outside the optical path of the photographing optical system, and enables communication with the outside by being connected through the hole ,
A lid part that is detachably provided in the hole part and covers a part in a circumferential direction of the outer appearance cylinder and closes the hole part in a state of being attached to the hole part;
A lens barrel comprising: The lens barrel according to claim 1,
The connector is used for writing a program to the main CPU,
A lens barrel characterized by The lens barrel according to claim 2,
The connector is used for writing information to the nonvolatile storage means;
A lens barrel characterized by In the lens barrel according to any one of claims 1 to 3,
An electrical element mounted on the electrical board so as to be disposed outside the optical path of the imaging optical system, the electrical element is provided on a first surface of the electrical board, and the connector includes the connector Being provided on the second surface of the electrical substrate;
A lens barrel characterized by The lens barrel according to claim 4,
The electrical element is provided at a position adjacent to the back of the connector across the electrical board;
A lens barrel characterized by In the lens barrel according to any one of claims 1 to 5,
The lid portion also serves as at least one of a nameplate, an operation member, and a switch;
A lens barrel characterized by In the lens barrel according to any one of claims 1 to 6,
The electrical substrate is a hard substrate disposed around an optical path of the photographing optical system;
A lens barrel characterized by

Images