JP2010237558A - Photographing module and assembling method of photographing module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a photographing module for further reducing the size of an element holder, and an assembling method of the photographing module. <P>SOLUTION: A first screw SC1 is intermittently formed on the inner circumferential surface of the element holder 11 in the circling direction. A second screw, which engages with the first screw, is provided on the outer circumferential surface close to the opening on the object side of a lens holder 10, and a cut part 10K where an outer circumferential wall surface is intermittently cut in the circling direction is provided close to the opening on the imaging side. When the lens holder 10 is inserted into the element holder 11, the cut part 10K of the lens holder 10 is placed over the first screw SC1 of the element holder 11 in the circling direction, and the lens holder 10 is inserted into a holding opening 111 of the element holder 11 from the opening on the imaging side. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a photographing module that forms an image of a subject on an image sensor with a photographing lens and generates image data representing the subject on the image sensor, and a method for assembling the photographing module.

  Most recent mobile phones have built-in photographing modules (see, for example, Patent Document 1). In such a photographing module, it is necessary to reduce the size as much as possible so that it can be mounted on a mobile phone.

  Patent Document 1 introduces an imaging module that achieves miniaturization by using two components, a lens holder and an element holder, as main components. In this patent document 1, the element holder is made into a hollow cylinder, a lens holder is inserted from an opening on one side of the element holder, and a substrate on which an imaging element is mounted is arranged at the opening end on the other side of the element holder. In addition, a screw is formed on the outer peripheral surface of the lens holder and the inner peripheral surface of the element holder, and the lens holder is rotated back and forth with respect to the element holder during focus adjustment. The lens module and the element holder are bonded and fixed with an adhesive after the image pickup element is positioned on the image pickup module, thereby reducing the size of the photographing module.

JP 2006-80961 A

  In recent years, it is sometimes necessary to increase the lens diameter for the purpose of increasing the amount of light captured from the subject to brighten the entire image or improving the resolution of the periphery of the subject captured by the lens. In such a case, if the configuration of Patent Document 1 is to be used as it is, the protruding end of the thread provided on the inner peripheral surface of the element holder must be matched with the outer diameter of the lens holder holding the lens having an increased lens diameter. As a result, the inner diameter of the element holder including the portion other than the screw is increased by the length of the crest and trough of the screw, and the element holder becomes larger.

  In view of the above circumstances, an object of the present invention is to provide an imaging module that can further reduce the size of an element holder, and an assembling method of the imaging module.

The photographing module of the present invention that achieves the above object is
A lens holder having an objective side opening and an imaging side opening and holding a photographing lens;
An element holder in which the lens holder enters and is held on the front surface and has an element arrangement opening which is closed by the image pickup element on the back surface and the image pickup element is fixed so as to close the element arrangement opening;
The element holder has a first screw that is intermittently formed in the circumferential direction on the inner peripheral surface and screwes the lens holder;
The lens holder has a cutout portion that is intermittently cut off in the circumferential direction on the outer peripheral wall surface near the image forming side opening to avoid interference with the first screw, and the objective is more than the cutout portion. It has the 2nd screw screwed together with the 1st above-mentioned screw on the peripheral face near the side opening.

  According to the photographing module of the present invention, the lens holder is positioned on the image-forming side opening in the holding opening of the element holder in a posture in which the notch of the lens holder is overlapped with the first screw of the element holder in the circumferential direction. Inserted from the side. For this reason, the outer diameter of the lens holder can be substantially matched with the inner diameter of the element holder while ignoring the thread valleys.

  This means that the lens diameter remains the same, and the first screw formed intermittently even if the inner diameter of the element holder is reduced to approximately the same as the outer diameter of the lens holder. If several notches are provided in accordance with the lens holder, when the lens holder is inserted, the lens holder can be easily inserted into the element holder by inserting the notch into a position overlapping the first screw. Can be inserted into the holder.

An assembling method of the photographing module of the present invention that achieves the above object is as follows.
Prepare the lens holder and the element holder before the assembly constituting the photographing module of the present invention,
The lens holder is inserted into the holding opening of the element holder from the imaging side opening side, with the notch of the lens holder overlapped with the first screw of the element holder in the circumferential direction,
By adjusting the position of the lens holder in the optical axis direction while screwing the second screw of the lens holder into the first screw, the photographic lens held by the lens holder is attached to the element holder. The position in the optical axis direction with respect to the fixed imaging element is adjusted.

  According to the method for assembling the photographing module of the present invention, the notch of the lens holder is overlapped with the first screw of the element holder in the circumferential direction so that the lens holder is connected to the holding opening of the element holder. By inserting from the image side opening side, the lens holder holding the lens can be smoothly inserted into the element holder having an inner diameter substantially matched to the outer diameter of the lens holder.

  According to the present invention, an imaging module capable of further reducing the size of the element holder and an assembling method of the imaging module are realized.

It is a perspective view which shows the structure of the imaging | photography module to which this invention was applied. It is an exploded view showing a configuration of a photographing module to which the present invention is applied. It is sectional drawing which shows the structure of the imaging | photography module to which this invention was applied. It is sectional drawing seen from another angle which shows the structure of the imaging | photography module to which this invention was applied.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 4 are diagrams showing a configuration of a photographing module to which the present invention is applied.

  FIG. 1 shows a perspective view of the photographing module 1 after assembling. FIG. 2 shows an exploded view of the constituent elements obtained by disassembling the photographing module 1 shown in FIG. Has been. FIG. 3 is a cross-sectional view of the cut surface of the photographing module 1 shown in FIG. FIG. 4 shows a cross-sectional view of the surface of the photographing module 1 shown in FIG.

  As shown in FIG. 2, the imaging module 1 shown in FIG. 1 includes a lens holder 10, an element holder 11, an image sensor 12, a cover glass 13 that covers the object side surface of the image sensor, and an image sensor. And a fixed substrate 14.

  The lens holder 10 shown in FIG. 2 has an objective side opening 10A and an image forming side opening 10B, as shown in FIG. In the present embodiment, a photographing lens including four lenses of the first lens 101, the second lens 102, the third lens 103, and the fourth lens 104 is listed as an example. The imaging lens 100 shown in FIG. 3 is similar to Patent Document 1, for the purpose of increasing the amount of light captured from the subject to brighten the entire image or improving the resolution of the peripheral portion of the subject captured by the lens. The lens diameter is made larger than before.

  The element holder 11 shown in FIG. 2 has a holding opening 111 in which the lens holder 10 enters and is held on the front surface, and an element arrangement opening 112 which is closed by the image pickup device 12 on the back surface. In the element holder 11, as shown in FIG. 2, the first screw SC1 is intermittently formed in the circumferential direction on the inner peripheral surface 11S. The inner diameter of the element holder 11 is almost the same as the outer diameter of the lens holder 10 and is miniaturized.

  On the other hand, the lens holder 10 is formed with a second screw SC2 which is screwed with the first screw SC1 on the outer peripheral surface near the objective side opening. Further, a notch portion 10K that avoids interference with the first screw SC1, in which the outer peripheral wall surface 10S is intermittently cut in the circumferential direction, is provided near the image forming side opening of the lens holder 10. Of the four lenses 101 to 104, the lens 104 that is located at the most image forming side opening 10B and has the largest diameter is held in a portion of the outer peripheral wall surface 10S that is not cut out.

  In the present embodiment, the first screw SC <b> 1 is intermittently formed in the circumferential direction on the inner circumferential surface of the element holder 11, and the outer peripheral wall surface is intermittently cut in the circumferential direction near the imaging side opening of the lens holder 10. By providing the notched part 10K, the inner diameter of the element holder 10 is adjusted to the outer diameter of the lens holder 11 while avoiding interference of the first screw SC1 when the lens holder 10 is inserted into the element holder 11. It is possible to reduce the size to a minimum.

  FIG. 3 shows a cross-section at an angle passing through the notch 10K in a state where the lens holder 10 is inserted into the element holder 11, and FIG. 4 shows a non-notched portion in the same state as FIG. A cross-section at the passing angle is shown. FIG. 4 shows a state where the outer periphery of the lens holder 10 is in contact with the inner periphery of the element holder 11.

  That is, as shown in FIG. 4, even if the element holder is downsized so that the inner diameter Φ of the element holder 11 is substantially matched with the outer diameter of the lens holder, the lens holder holding the lens is intermittently formed with the notch 10K. Using the positional relationship with the first screw SC1 thus made, it can be skillfully inserted into the element holder 11.

  After the insertion of the lens holder 10 into the element holder 11, the focus adjustment can be performed finely while the second screw SC2 of the lens holder 10 is smoothly screwed into the first screw SC1 of the element holder 10. .

  As described above, an imaging module that can further reduce the size of the element holder is realized.

  Next, an assembling method of the photographing module 1 will be described with reference to FIG.

  When assembling the photographing module 1 in FIG. 1, first, the notch 10K in which the outer peripheral wall surface 10S of the lens holder 10 shown in FIG. 2 is cut is overlapped with the first screw SC1 of the element holder 11 in the circumferential direction, The holder 10 is inserted into the holding opening 111 of the element holder 11 from the imaging side opening 10B side. When the cutout portion is inserted so as to overlap the first screw SC1, interference with the first screw SC1 of the element holder 11 is avoided by the cutout portion 10K, and the lens holder 10 can be smoothly inserted into the element holder 11. .

  Next, the image sensor 12 is arranged so as to close the element arrangement opening 112, and the substrate 14 to which the image sensor 12 is fixed is bonded and fixed to the element holder 11.

  Thereafter, a jig for rotating the lens holder 10 is inserted into the concave portion P on the front surface of the lens holder 10, and the second screw SC 2 of the lens holder 10 is screwed to the first screw SC 1 of the element holder 11. However, by adjusting the position of the lens holder 10 in the optical axis direction, the position of the photographing lens 100 held by the lens holder 10 with respect to the imaging element 12 fixed to the element holder 11 is adjusted. At this time as well, the notch 10K preferably acts to enable smooth movement of the lens holder. Focus adjustment is performed while slightly moving the lens holder that can move smoothly in this manner along the optical axis. After the focus adjustment is completed, the lens holder 10 is bonded and fixed to the element holder 11 with an adhesive.

  In this way, even when the inner diameter Φ of the element holder 11 is made small enough to match the outer diameter of the lens holder, the lens holder 10 can be inserted into the element holder 11 and the focus adjustment can be performed precisely. .

  As described above, according to the present invention, an imaging module assembling method that can further reduce the size of the element holder is realized.

DESCRIPTION OF SYMBOLS 1 Image pick-up module 10 Lens holder 10K Notch part 11 Element holder 12 Image pick-up element 13 Cover glass 14 Board | substrate SC1 1st screw | thread SC2 2nd screw | thread

Claims (2)

A lens holder having an objective side opening and an imaging side opening and holding a photographing lens;
An element holder in which the lens holder enters and is held on the front surface and an element arrangement opening which is closed by the image pickup element on the back surface and the image pickup element is fixed so as to close the element arrangement opening;
The element holder has a first screw that is intermittently formed in the circumferential direction on the inner peripheral surface and screwes the lens holder;
The lens holder has a cutout portion that is intermittently cut off in the circumferential direction on the outer peripheral wall surface near the imaging side opening to avoid interference with the first screw. An imaging module comprising a second screw threadedly engaged with the first screw on an outer peripheral surface near the side opening. A lens holder and an element holder before the assembly constituting the photographing module of claim 1 are prepared,
The lens holder is inserted into the holding opening of the element holder from the imaging side opening, with the notch of the lens holder being overlapped with the first screw of the element holder in the circumferential direction,
By adjusting the position of the lens holder in the optical axis direction while screwing the second screw of the lens holder onto the first screw, the photographic lens held by the lens holder is attached to the element holder. A method of assembling an imaging module, comprising adjusting a position in an optical axis direction with respect to a fixed imaging device.

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