JP2018097095A - Pin and imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pin capable of precisely coupling a coupling object member such as a base and a substrate of an imaging device while adjusting a position.SOLUTION: A pin is adopted having a cylindrical primary shaft unit with a central shaft as a center and an eccentricity head unit whose center varies in accordance with a position in a shaft direction. In particular, an imaging device is configured to include: a lens barrel for holding a lens; a substrate having an imaging unit for receiving light passing through the lens; a base for holding the lens barrel and the substrate; and the pin for coupling the substrate with the base.SELECTED DRAWING: Figure 6

Description

  One embodiment of the present invention relates to a pin, an imaging device, and the like.

  2. Description of the Related Art Conventionally, there is an adjustment mechanism that adjusts the position and inclination of a lens with respect to an image sensor in an optical device including a lens and an image sensor (see, for example, Patent Document 1 and Patent Document 2). In such an adjustment mechanism, the position and inclination of the lens and the image sensor are adjusted by moving the lens and the image sensor relative to each other and fixing them by using screws or an adhesive at a desired position. It was.

JP 2007-71908 A JP 2013-64848 A

  However, in the conventional adjustment mechanism described above, the relative position between the lens and the image sensor is mainly determined manually in the manufacturing process. Had problems. Further, there was no means for fixing the relative position of the two members with low cost and high accuracy.

  The present invention employs the following means in order to solve the above-described problems. In the following description, in order to facilitate understanding of the invention, reference numerals and the like in the drawings are appended in parentheses, but each component of the present invention is not limited to these appendices. It should be construed broadly to the extent that contractors can technically understand.

One means of the present invention is to
A cylindrical main shaft portion (51b) centering on the central axis;
An eccentric head (51a) whose center changes according to the position in the axial direction,
Pin (51).

  In the pin having the above configuration, the center position of the head cross section changes according to the amount of the pin inserted into the insertion hole, so that the relative position of the target member connected by the pin can be accurately changed.

In the pin, preferably
The center of the eccentric head (51a) changes continuously according to the position in the axial direction.

  According to the pin having the above configuration, the center position of the head section changes continuously according to the insertion amount of the pin into the insertion hole, so that the relative position of the target member connected by the pin can be changed with higher accuracy. It becomes possible.

In the pin, preferably
The main shaft portion (51b) has a thread (51c).

  According to the pin of the said structure, a connection object member can be connected using a screw thread. Thereby, a connection object member can be connected by simple structure, without using an adhesive agent or another connection mechanism.

In the pin, preferably
The eccentric head (51a) has a circular cross section perpendicular to the axial direction.

  According to the pin having the above configuration, since the cross section of the head is circular, the position can be changed smoothly according to the rotation, and the relative position of the target member connected by the pin can be changed more accurately. It becomes possible.

The present invention also provides:
A lens barrel (1) for holding the lens;
A substrate (4) having an imaging unit (4a) for receiving light that has passed through the lens;
A base (2) for holding the lens barrel and the substrate;
Any one of the pins (51, 52) connecting the substrate and the base;
An imaging device.

  According to the imaging apparatus having the above-described configuration, the position adjustment between the substrate and the base can be adjusted with high accuracy.

The external appearance perspective view of an imaging device. The exploded perspective view of an imaging device. The top view which looked at the imaging device from the back side of an optical axis direction. Sectional drawing of a base, a board | substrate, and an eccentric pin. Sectional drawing of a base, a board | substrate, and an eccentric pin. The top view from the head side and side surface side of an eccentric pin. The figure which shows the change of the center position of an eccentric pin.

  The imaging device according to the embodiment of the present invention is characterized by the configuration of an eccentric pin that connects the base and the substrate, and the relative position between the base and the substrate is adjusted by the amount of screwing of the eccentric pin. This is one of the features.

An embodiment according to the present invention will be specifically described according to the following configuration with reference to the drawings. However, the embodiment described below is merely an example of the present invention and does not limit the technical scope of the present invention. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and the description may be abbreviate | omitted.
1. Embodiment 2. FIG. 2. Features of the present invention Supplementary matter

<1. Embodiment>
First, the configuration of the imaging apparatus of the present invention will be specifically described. FIG. 1 is an external perspective view of the imaging apparatus according to the present embodiment. FIG. 2 is an exploded perspective view of the imaging apparatus according to the present embodiment. FIG. 3 is a plan view of the imaging apparatus according to the present embodiment as viewed from the rear side in the optical axis direction. In this specification, on the optical axis located at the center of the lens, the side on which the subject is located is referred to as “subject side” or “front in the optical axis direction”, and the opposite side is referred to as “imaging device side” or “light This is referred to as “axially rearward”.

  As shown in FIGS. 1 to 3, the imaging apparatus of the present embodiment includes a lens barrel 1, a base 2, a set screw 3, and a substrate 4. Further, as shown in FIGS. 2 and 3, the base 2 and the substrate 4 are connected by eccentric pins 51 and 52 and screws 61 and 62.

<Lens barrel 1>
The lens barrel 1 is disposed in front of the base 2 in the optical axis direction and accommodates a plurality of lenses while supporting them. The periphery of at least a part of the lens barrel 1 is covered with the base 2. The lens barrel 1 may accommodate a spacer, a filter, and the like in addition to a plurality of lenses. Note that the number of lenses and the like accommodated in the lens barrel 1 can be arbitrarily changed.

<Base 2>
The base 2 is held while covering at least a part of the lens barrel 1. The base 2 holds the substrate 4 by being connected by eccentric pins 51 and 52 and screws 61 and 62. The base 2 has holes into which eccentric pins 51 and 52 and screws 61 and 62 are inserted. The base 2 has a hole into which the set screw 3 is inserted. The position of the lens barrel 1 is fixed with respect to the base 2 by the set screw 3.

<Substrate 4>
The substrate 4 is mounted with the image sensor 4 a and other electronic components and is connected to the base 2. The substrate 4 has a long hole 4b into which the eccentric pin 51 is inserted, a round hole 4c into which the eccentric pin 52 is inserted, and a hole into which the screws 61 and 62 are inserted. As shown in FIGS. 2 and 3, the round hole 4c has a circular shape, and the long hole 4b has a long hole shape extending in the lateral direction. The imaging element 4a is a photoelectric conversion element that converts incident light into an electrical signal, such as a C-MOS or a CCD. The imaging element 5a is an example of the “imaging unit” in the present invention.

<Eccentric pins 51 and 52>
4 and 5 are cross-sectional views of the base 2, the substrate 4, and the eccentric pin 51, and show a state in which the eccentric pin 51 connects the base 2 and the substrate 4. Since the eccentric pin 52 has the same shape as the eccentric pin 51, the description thereof is omitted here. In contrast to FIG. 4, FIG. 5 shows a state in which the eccentric pin is inserted deeper into the base 2. FIG. 6 is a plan view of the eccentric pin 51 on the head side (left diagram) and side surface side (right diagram). As shown in FIG. 6, the eccentric pin 51 has an eccentric head portion 51a and a main shaft portion 51b. The main shaft portion 51b has a shaft 51d and a thread 51c. The shaft 51d has a cylindrical shape centered on the central axis A. The thread 51c is formed on at least a part of the outer periphery of the shaft 51d.

  The eccentric head 51a is centered on an axis B having a predetermined inclination with respect to an extension line of the central axis A of the main shaft 51b, and a plane perpendicular to the central axis A is the same regardless of the position of the cross section. It is formed in a circular shape. In the vicinity of the end of the eccentric head 51a, the cross section may not be the same cylindrical shape (see FIG. 6). The axis B has an inclination of, for example, 5 degrees with respect to the central axis A. That is, the eccentric head 51 a has a shape extending in an oblique direction with respect to the central axis A.

  As shown in FIGS. 4 and 5, the eccentric pin 51 is inserted into the hole of the base 2 through the long hole 4 b of the substrate 4 from the rear to the front in the optical axis direction. A screw thread is formed in the hole of the base 2 and can be screwed with the screw thread 51 c of the eccentric pin 51. When the eccentric pin 51 is rotated in a predetermined direction, the screw thread 51c is inserted while being screwed with the screw thread of the hole of the base 2. When the eccentric head 51 a of the eccentric pin 51 is inserted into the hole of the base 2, the position of the portion inserted into the long hole 4 b of the substrate 4 changes. The position changes. Specifically, the position of the substrate 4 is changed to the upper side of the drawing in FIG. 5 compared to FIG. That is, the amount of eccentricity of the eccentric head 51a can be changed according to the amount of insertion of the eccentric pin 51.

  FIG. 7 is a diagram showing the relationship between the rotation state of the eccentric pin 51 and the center position of the cross section of the eccentric head 51a. As shown in FIG. 7, when the eccentric pin 51 is rotated and inserted into the hole of the base 2, the center of the cross section of the eccentric pin 51 of the portion inserted into the long hole 4 b of the substrate 4 is long. From the initial position where the center of the cross section of the eccentric head 51a inserted into the hole 4b overlaps the central axis A, the spiral head changes in a spiral trajectory. As described above, since the axis B is inclined by 5 degrees with respect to the central axis A, θ in FIG. 7 is 5 degrees.

  When assembling the imaging apparatus, first, the base 2 and the lens barrel 1 are connected. And the base 2 and the board | substrate 4 are piled up, and the eccentric pins 51 and 52 are inserted in the elongate hole 4b and the round hole 4c. Since the eccentric pins 51 and 52 are not inserted into the same round hole but into the long hole 4b and the round hole 4c, the degree of freedom of position adjustment is increased. At this time, the relative position between the lens barrel 1 and the substrate 4 is adjusted to an appropriate position while changing the amount of insertion of the eccentric pins 51 and 52. When the adjustment by the eccentric pins 51 and 52 is completed, the position is fixed by connecting the base 2 and the lens barrel 1 with the screws 61 and 62. Note that the above assembly process is a part of the assembly process of the imaging apparatus.

  In the present embodiment, the imaging device has been described as a specific example. However, the eccentric pin of the present invention is not necessarily used only in the imaging device, and two members whose relative positions are desired to be accurately changed. It can also be used for the connection. However, in the imaging apparatus, since it is necessary to adjust the positions of the lens and the imaging element with particularly high accuracy, the eccentric pin of the present embodiment can be used particularly effectively.

  In the present embodiment, the example in which the axis B is inclined by 5 degrees with respect to the central axis A and the eccentricity changes continuously and at a constant change amount has been described. However, the present embodiment is limited to such a form. Is not to be done. That is, there may be a point where the amount of eccentricity does not change continuously but changes discontinuously, and the change of the amount of eccentricity may not be constant. In this case, the relationship between the central axis A and the axis B does not have a predetermined angle but may be an arbitrary relationship.

  Further, the angle and direction of the inclination of the axis B with respect to the central axis A can be arbitrarily changed. For example, the axis B may be inclined with respect to the central axis A in a direction opposite to the direction described in FIG.

  In the present embodiment, the eccentric pin 51 has the screw thread 51c, but the eccentric pin 51 may have a structure without the screw thread 51c. In this case, since the base 2 and the substrate 4 cannot be fixedly connected by screw threads, the base 2 and the substrate 4 are fixedly connected using an adhesive or the like. The eccentric pin 51 of the present embodiment having the thread 51c may be referred to as an “eccentric screw”.

<2. Features of the present invention>
The pin of the present invention used in the imaging device of the above embodiment includes a cylindrical main shaft portion (51b) centered on the central axis A and an eccentric head (51a) whose center changes according to the position in the axial direction. ). For this reason, since the center position of the head section changes according to the amount of insertion of the pin into the insertion hole, the relative position of the target member (for example, the base 2 and the substrate 4) connected by the pin can be accurately changed. Become.

  Moreover, since the center of the eccentric head (51a) of the pin of the present invention changes continuously according to the position in the axial direction, the section of the head section is continuously changed according to the amount of the pin inserted into the insertion hole. The center position changes, and the relative position of the target member connected by the pin can be changed with higher accuracy.

  Moreover, since the main shaft portion (51b) of the pin of the present invention has a screw thread (51c), the connection target member can be connected using the screw thread. Thereby, a connection object member can be connected by simple structure, without using the adhesive agent or another connection mechanism, or reducing the usage-amount of an adhesive agent.

  Moreover, since the eccentric head (51a) of the pin of the present invention has a circular cross section perpendicular to the axial direction, the position can be changed smoothly according to the rotation, and the target member connected by the pin The relative position can be changed with higher accuracy.

  The imaging device of the present invention holds a lens barrel (1) that holds a lens, a substrate (4) that has an imaging unit (4a) that receives light that has passed through the lens, and a lens barrel and a substrate. A base (2) to be connected, and eccentric pins (51, 52) for connecting the substrate and the base. According to the imaging apparatus of the present invention, it is possible to provide a configuration that can adjust the position adjustment between the substrate and the base in the imaging apparatus with high accuracy.

<3. Supplementary items>
The specific description of the embodiment of the present invention has been given above. In the above description, the description is merely an embodiment, and the scope of the present invention is not limited to this embodiment, but is broadly interpreted to the extent that a person skilled in the art can grasp.

  The pin of the present invention is suitably used as an eccentric pin for fixing a base of an imaging apparatus such as a digital camera and a substrate.

DESCRIPTION OF SYMBOLS 1 ... Lens barrel 2 ... Base 3 ... Screw 4 ... Board | substrate 4a ... Image pick-up element 4b ... Long hole 4c ... Round hole 51 ... Eccentric pin 51a ... Eccentric head 51b ... Main shaft part 51c ... Thread 51d ... Shaft 52 ... Eccentric pin 61 ... Screw

Claims (5)

A columnar main shaft centered on the central axis;
An eccentric head whose center changes according to the position in the axial direction,
pin. The center of the eccentric head continuously changes according to the position in the axial direction.
The pin according to claim 1. The main shaft portion has a thread;
The pin according to claim 1 or claim 2. The eccentric head has a circular cross section perpendicular to the axial direction.
The pin according to any one of claims 1 to 3. A lens barrel that holds the lens;
A substrate having an imaging unit for receiving light that has passed through the lens;
A base for holding the lens barrel and the substrate;
The pin according to any one of claims 1 to 4, which connects the substrate and the base.
Imaging device.

Images