CN1870724A

CN1870724A - Camera module

Info

Publication number: CN1870724A
Application number: CNA2006100681855A
Authority: CN
Inventors: 真野伸之
Original assignee: SMK Corp
Current assignee: SMK Corp
Priority date: 2005-05-24
Filing date: 2006-03-20
Publication date: 2006-11-29
Also published as: KR20060121665A; TW200642448A; JP2006330121A

Abstract

Here is a kind of camera module whose cylinder (2) is screw joint with the base (5) fixed on the base plate (1), and adjust lenses' (25,25) focusing distance can be adjusted by changing screwing. Dent (31) bestriding the cylinder (2) and the base (5) is formed on at least one of them and can receive extra light, and by injecting photohardening adhesive (30) into the dent (31), the cylinder (2) and the base (5) can be fixed. The photohardening adhesive (30) can vulcanize in a short time and has so high viscosity that it will not immerge into the screwing part between the cylinder (2) and the base (5). This invention can cut the time for fixing the cylinder (2) and the base (5); thereby work time and cost are cut down.

Description

Camera module

Technical field

The present invention relates to be used for the camera module of mobile phone or portable terminal etc.

Background technology

Camera module in the past as shown in Figure 9, possess: be equipped with circuit substrate (the following substrate that only claims) 103, the support of lens 105,105 of imaging apparatus 101 cylinder 107, and screw togather with cylinder 107 and support cylinder 107 and be fixed in base 113 on the substrate 103 with bonding agent 109,111, adjust distance (being the focal length of lens 105,105) (for example with reference to patent documentation 1) between lens 105,105 and the imaging apparatus 101 by the amount of screwing togather of adjustment cylinder 107 and base 113.

The fixing of 113 of adjusted cylinder 107 and bases carries out (for example with reference to patent documentation 2) by the screw part 115 that for example bonding agent is injected 113 of cylinder 107 and bases.

[patent documentation 1] TOHKEMY 2004-297282 number

[patent documentation 2] TOHKEMY 2003-172859 number

Yet, in the past for 113 of cylinder 107 and bases is fixing and use thermmohardening type bonding agent as the bonding agent that injects screw part 115, so firm time long (for example 30 minutes～60 minutes), and the activity duration is long, causes the cost rising.

Summary of the invention

The present invention in view of the above-mentioned problems, purpose be to provide a kind of shorten cylinder (example of the 1st supporting member) and base (example of the 2nd supporting member) thus between the fixing required time shorten the activity duration so that the camera module that cost descends.

The camera module of technical scheme 1 possesses: the substrate that is equipped with imaging apparatus, the 1st supporting member of support of lens, screw togather with above-mentioned the 1st supporting member and support above-mentioned the 1st supporting member and be fixed in the 2nd supporting member on the aforesaid substrate, can utilize the amount of screwing togather of above-mentioned the 1st supporting member and above-mentioned the 2nd supporting member to adjust the focal length of said lens, it is characterized by: at least one side in above-mentioned the 1st supporting member and above-mentioned the 2nd supporting member, formation is across above-mentioned the 1st supporting member and above-mentioned the 2nd supporting member and can accept the recess of ambient light, and, above-mentioned the 1st supporting member and above-mentioned the 2nd supporting member are fixed by injecting the ray hardening type adhesive of above-mentioned recess.

Technical scheme 2 is in the invention of technical scheme 1, recess extends to the screw part of the 1st supporting member and the 2nd supporting member, and the ray hardening type adhesive that injects above-mentioned recess has the high viscosity of the degree of the screw part that can not immerse above-mentioned the 1st supporting member and above-mentioned the 2nd supporting member.

Technical scheme 3 is in the invention of technical scheme 2, the 1st supporting member possesses: form the male screw portion of male thread on the outer peripheral face of cylinder, with the upper plate of the upper end open portion obturation of this male screw portion, the 2nd supporting member possesses: the box thread portion that forms the box thread that can screw togather with the male thread of male screw portion at cylindric inner peripheral surface, recess is made of with a plurality of recesses that uniformly-spaced form along circumferencial direction the periphery at above-mentioned upper plate, and this recess extends to the male screw portion of the 1st supporting member.

The camera module of technical scheme 4 possesses: the substrate that is equipped with imaging apparatus, the 1st supporting member of support of lens, screw togather with above-mentioned the 1st supporting member and support above-mentioned the 1st supporting member and be fixed in the 2nd supporting member on the aforesaid substrate, can utilize the focal length of the amount of the screwing togather adjustment said lens of above-mentioned the 1st supporting member and above-mentioned the 2nd supporting member, it is characterized by: one of them side in above-mentioned the 1st supporting member and above-mentioned the 2nd supporting member is shaped with light transmission section bar material, and pass through the ray hardening type adhesive of the screw part of above-mentioned the 1st supporting member of injection and above-mentioned the 2nd supporting member, above-mentioned the 1st supporting member and above-mentioned the 2nd supporting member are fixed.

Technical scheme 1 camera module be to possess substrate, the 1st supporting member and the 2nd supporting member, at least one side in the 1st supporting member and the 2nd supporting member, formation is across both and can accept the recess of ambient light, and the 1st supporting member and the 2nd supporting member are fixed by the ray hardening type adhesive that injects recess, the constant intensity of the 1st supporting member and adjusted the 1st supporting member of the 2nd supporting member amount of screwing togather and the 2nd supporting member is increased, and must not heat, can fix in the short time.

The invention of technical scheme 2 is in the invention of technical scheme 1, recess extends to the screw part of the 1st supporting member and the 2nd supporting member, and the ray hardening type adhesive that injects recess has the high viscosity that can not immerse the degree of screw part, therefore can enlarge the 1st supporting member that is formed by recess and make the constant intensity change with the fixed-area between the 2nd supporting member greatly.

The invention of technical scheme 3 is in the invention of technical scheme 2, the 1st supporting member possesses male screw portion and upper plate, the 2nd supporting member possesses box thread portion, recess is made of with a plurality of recess that uniformly-spaced forms the periphery at above-mentioned upper plate, therefore the constant intensity of the 1st supporting member and the 2nd supporting member stably can be become big.

The camera module of technical scheme 4 possesses substrate, the 1st supporting member and the 2nd supporting member, at least one side in the 1st supporting member and the 2nd supporting member is shaped with light transmission section bar material, and utilize the ray hardening type adhesive of the screw part that injects the 1st supporting member and the 2nd supporting member, therefore the 1st supporting member and the 2nd supporting member are fixed, be not required to be and fixed the 1st supporting member and the 2nd supporting member and form the recess of accumulating bonding agent.

Description of drawings

The section of Fig. 1 displayed map 2, Fig. 1 (a) are the amplification profiles along A-A line among Fig. 2, and Fig. 1 (b) is the part amplification profile along B-B line among Fig. 2.

Fig. 2 is the vertical view that shows one embodiment of the invention.

Fig. 3 is the front view of Fig. 2.

Fig. 4 is the stereogram (omitting bonding agent among the figure) of Fig. 2.

Fig. 5 is the stereogram of the cylinder 2 (endless elastomeric 4 engagings are kept, omit male screw portion 26) among displayed map 1～Fig. 4, and Fig. 5 (a) is the figure that watches from oblique upper, and Fig. 5 (b) is the figure that Fig. 5 (a) is reversed up and down.

Fig. 6 is the stereogram of the base 5 (omitting box thread portion 53) among displayed map 1～Fig. 4, and Fig. 6 (a) is the figure that watches from oblique upper, and Fig. 6 (b) is the figure that Fig. 6 (a) is reversed up and down.

Fig. 7 is the stereogram of the stationary plane of display base plate 1 and base 5, and Fig. 7 (a) shows the stationary plane 55 of base 5 (omitting box thread portion 53), the stationary plane 15 of Fig. 7 (b) display base plate 1 (omitting imaging apparatus 11 and circuit element 12～14).

Fig. 8 shows cylinder 2 and the profile that is fixed on the state before base 5 on the substrate 1 screws togather.

Fig. 9 shows the profile of example in the past.

[main element symbol description]

1: substrate 2: cylinder (the 1st supporting member one example)

5: base (the 2nd supporting member one example) 7: supporting member 15: the stationary plane of substrate 1

16: the special-shaped part 17 in the stationary plane 15: the special-shaped part in the stationary plane 15

26: male screw portion 30: ray hardening type adhesive 31: recess 53: box thread portion

55: the stationary plane 56 of base 5: stopper portion 60: bonding agent

61: adhesive linkage 62: bonding fillet 63: bonding fillet

Embodiment

Fig. 1～Fig. 8 shows one embodiment of the invention, in these figure, symbol 1 is circuit substrate (to call substrate in the following text), and symbol 2 is the cylinder as an example of the 1st supporting member, symbol 4 is the endless elastomeric as elastic component one example, and symbol 5 is the base as the 2nd supporting member one example.

Cylinder 2 and base 5 support of lens 25,25, and form the supporting member 7 that is fixed on the substrate 1.

Substrate 1 is shown in Fig. 7 (b), and is roughly square tabular with synthetic resin formation, and forms the shape of four clipped corners.

Central portion on substrate 1, shown in Fig. 1 (a), be equipped with the imaging apparatus 11 of electric property ground connection and other circuit element 12～14 etc., and below the side of substrate 1 reaches, be equipped with outside terminal for connecting (omitting diagram) by Wiring pattern (omission diagram).

Periphery on substrate 1 forms the stationary plane 15 shown in Fig. 7 (b).

Stationary plane 15 is roughly square ring-types, and quadrangle becomes the tilted shapes of inclination 45 degree.

Four jiaos and central authorities on one side at stationary plane 15 form the big special-shaped part 16～16,17 of counterpart area than the stationary plane 55 (aftermentioned) of base 5.

Cylinder 2 is used forming synthetic resin, shown in Fig. 5 (a) and (b), possess: form the cylinder body 21 roughly cylindraceous and upper end open portion of this cylinder body 21 is inaccessible and make the outstanding annularly upper plate 22 of outer peripheral edges axle, and be formed with diaphragm hole 23 at this upper plate 22.

Keep two lens 25,25 in the inboard of cylinder body 21, and form male screw portion 26, have male thread at the outer peripheral face of this male screw portion 26 in the outside of cylinder body 21.

Lower ending opening side in cylinder body 21 forms engaging end difference 28, is used for endless elastomeric 4 engaging clampings.

At the periphery of upper plate 22, shown in Fig. 5 (a) and (b), equally spaced be formed with 4 recesses 31 along circumferencial direction, this recess 31 extends to the top of the male screw portion 26 of cylinder body 21.This recess 31 is used for accumulating the ray hardening type adhesive 30 that injects from the outside, the ray hardening type adhesive 30 that injects has the high viscosity of the degree of the screw part that can not immerse cylinder 2 and base 5, and can utilize ultraviolet ray or visible light in short time (for example 10 seconds front and back) sclerosis.

Endless elastomeric 4 is configured as circle by the elastomeric material of synthetic rubber one class with outer peripheral edges, and possesses integrally formed holding section 41 and abutting part 42.

The section of holding section 41 is pentagon shape roughly, can with cylinder body 21 engage end difference 28 engagings, and the section of abutting part 42 is semi-circular shape roughly.

Base 5 is used forming synthetic resin, and shown in Fig. 6 (a) and (b), possesses: form roughly cylindraceous go up wing base 51, and with should on the following wing base 52 of the continuous roughly quadrangular barrel shape of the downside of wing base 51.

On last wing base 51, form box thread portion 53 at its cylindric inner peripheral surface, and the box thread of this box thread portion 53 forms the shape that can screw togather with the male thread of the male screw portion 26 of cylinder body 21 with box thread.

In the inboard of last wing base 51 with the connecting portion of following wing base 52, be equipped with roughly circular stopper portion 56, the male screw portion 26 that is used to limit cylinder 2 is advanced the mobile limit positions of direction at spiral shell.

Central portion at a sidewall that descends wing base 52 is formed with otch 57, the upside of this otch 57, downside and outer openings.

The lower surface of following wing base 52 then is and the stationary plane 55 of 1 of substrate, and this stationary plane 55 is square ring-type roughly, oblique 45 degree of four angle lappings, and the excision of the middle body on a limit shown in Fig. 7 (a).

The stationary plane 55 of base 5 and the stationary plane 15 of substrate 1 are by be fixed with the adhesive linkage 61 of bonding agent 60 formation and bonding fillet 62,63 (bonding).

The combine and assemble of camera module below is described.

(1) the real stationary plane 15 that the substrate 1 of imaging apparatus 11 and circuit element 12～14 is housed, and the stationary plane 55 of base 5 at least one side's adhesive-applying 60, and make the central shaft of the face of accepting of imaging apparatus 11 consistent with the central shaft of last wing base 51, under this state, make stationary plane 15 and stationary plane 55 across bonding agent 60 driving fits, with base 5 mountings on substrate 1.This bonding agent 60 can be any in thermmohardening type, normal temperature hardened, the photo-hardening type.

Then, by making bonding agent 60 sclerosis, part at stationary plane 15 and stationary plane 55 opposite faces base 5 of substrate 1 forms the adhesive linkage 61 that both are fixed, and is forming the bonding fillet 62～62,63 that both are fixed with the continuous predetermined portions of this adhesive linkage 61.

Bonding fillet 62 is the partial fixing adjacent with special-shaped part 16 with the lateral wall of the special-shaped part 16 of the stationary plane 15 of substrate 1 and following wing base 52 shown in Fig. 1 (b).

Bonding fillet 63 illustrates as enlarged drawing 1 (a), is the partial fixing that the special-shaped part 17 of the special-shaped part 17 of the stationary plane 15 of substrate 1 and the lateral wall of following wing base 52 is adjacent.

As mentioned above, by adhesive linkage 61 and bonding fillet 62～62,63 that substrate 1 is fixing with base 5, even therefore the lengthwise of substrate 1 is wide with horizontal stroke is about 6mm, the thickness of slab (being the width of stationary plane 55) of the sidewall of wing base 52 is the miniature camera module of about 0.3mm down, also can obtain desirable constant intensity.For example, even when base 5 is shaped, be difficult to adhere to bonding agent, also can obtain desirable constant intensity by bonding fillet 62～62,63 because of stationary plane 55 produces warpage.

(2) then, shown in Fig. 5 (a) and (b), the engaging end difference 28 that the holding section 41 of endless elastomeric 4 is sticked in cylinder 2 shown in Fig. 8 and Fig. 1 (a), is screwed together in the male screw portion 26 of cylinder 2 the box thread portion 53 of base 5 then to keep endless elastomeric 4.

At this moment, the central shaft of lens 25,25 is consistent with the central shaft of last wing base 51, endless elastomeric 4 is crushed between the stopper portion 56 of the leading section of cylinder 2 and base 5 and strain takes place, under this state, for the focal length that makes lens 25,25 accurate, be pre-formed the shape of cylinder 2 and base 5, and set the number of threads of male screw portion 26 with box thread portion 53.

Therefore, in the amount of screwing togather of adjusting male screw portion 26 and box thread portion 53 so that after the focus of lens 25,25 cooperates imaging apparatus 11, endless elastomeric 4 just is sandwiched between the stopper portion 56 of the leading section of cylinder 2 and base 5 with the state of strain, and with the frictional force of its elastic force enhancing male screw portion 26 with box thread portion 53, and increase the fastening force that screws togather of cylinder 2 and base 5, thereby can prevent the skew of the focal length of the lens 25,25 that cause in the gap of screw part.

Again, get final product, therefore can avoid as routine in the past, causing maximization, thereby can realize miniaturization because of sandwiching crimping member and flat spring owing to only need make between the stopper portion 56 of leading section that endless elastomeric 4 is clipped in cylinder 2 and base 5.

(3) then, ray hardening type adhesive 30 is injected the recess 31～31 of cylinder 2, and as Fig. 1 (a), cylinder 2 and base 5 are fixed.

At this moment, because ray hardening type adhesive 30 has the high viscosity of the degree of the screw part that can not immerse cylinder 2 and base 5, therefore can be by ultraviolet ray or visible light in the short time (for example 10 seconds after) with ray hardening type adhesive 30 sclerosis so that cylinder 2 is fixing with base 5, be not immersed in the thread pitch of male screw portion 26 and box thread portion 53 and unhardened situation and ray hardening type adhesive 30 can not take place from recess 31.

The camera module of combine and assemble passes through connector for camera module use or directly is installed on the wired circuit board of mobile phone machine or portable terminal etc. as described above.

In the above-described embodiments, be that the recess that will accumulate ray hardening type adhesive equally spaced forms 4 in the top periphery portion of the 1st supporting member along circumferencial direction, but the present invention is defined in 4, also 1, or along circumferencial direction uniformly-spaced or unequal interval ground form 4 in addition a plurality of.

In the above-described embodiments, be on the 1st supporting member, to form the recess of accumulating ray hardening type adhesive, but the present invention is defined in this, also can form on the 2nd supporting member, or on the 1st supporting member and the 2nd supporting member, forms.

In the above-described embodiments, in order to enlarge fixed-area, the recess of accumulating ray hardening type adhesive is the screw part that extends to the 1st, the 2nd supporting member, but the present invention is defined in this, also can not extend to the screw part of the 1st, the 2nd supporting member.

In the above-described embodiments, the 1st, the 2nd supporting member is to be shaped with lighttight material (for example synthetic resin), but the invention is not restricted to this, and also at least one side in the 1st, the 2nd supporting member is shaped with the light-transmission type material.

In this occasion, owing to there is not recess can make ambient light be mapped to the screw part of the 1st, the 2nd supporting member, the therefore formation that can omit recess can be injected screw part with ray hardening type adhesive and at short notice the 1st supporting member and the 2nd supporting member fixed.

The camera module of the foregoing description is that the elastic component that is used for preventing the focal length skew of lens is made the endless elastomeric that possesses holding section and abutting part, and its holding section engaging is remained in the engaging end difference of the 1st supporting member, but the present invention is defined in this, also can utilize and screw togather the generation strain between the 1st supporting member and the 2nd supporting member, and increase the fastening force that screws togather of the 1st supporting member and the 2nd supporting member with its elastic force, to prevent the focal length skew of lens.

For example, elastic component can be the endless elastomeric (for example O ring) of section circle, and the part of its 1st supporting member side engages with annular recess in the front end face formation of the 1st supporting member when screwing togather.

Perhaps, the 1st supporting member of camera module can be to possess integrally formed threaded portion and annular resilient body, and forms the threaded portion with the high material of rigidity, and forms the annular resilient body and as elastic component with elastomeric material.In this occasion, automatically elastic component (annular resilient body) is packed into as long as the 1st supporting member and the 2nd supporting member just screwed togather, the combine and assemble engineering can be simplified.

In the camera module of the foregoing description, be that elastic component is clipped between the 1st supporting member and the 2nd supporting member, but the present invention is defined in this, does not also press from both sides elastic component (camera module in the past for example shown in Figure 9) between the 1st supporting member and the 2nd supporting member.

In the camera module of the foregoing description, in order to increase the constant intensity of substrate and the 2nd supporting member, the stationary plane of substrate and the 2nd supporting member with special-shaped part corresponding shape all be that with square ring-type four jiaos make 45 degree, but the present invention is defined in this, also can make four jiaos of the stationary plane of substrate circular-arc or rectangular-shaped, and four jiaos of the 2nd supporting member are made circular-arc, thereby become the more broad special-shaped part of counterpart at the quadrangle of the stationary plane of substrate than the stationary plane of the 2nd supporting member.

In the camera module of the foregoing description, the stationary plane of substrate and the 2nd supporting member forms roughly square ring-type, and four jiaos of the stationary plane of substrate and wherein on one side central authorities form the wider special-shaped part of counterpart area than the stationary plane of the 2nd supporting member, and partly form bonding fillet at this abnormity, but the present invention is defined in this, the a formation special-shaped part wider than the counterpart area of the stationary plane of the 2nd supporting member of stationary plane that also can be on substrate forms bonding fillet in this abnormity portion.

For example, can be shown in the double dot dash line of Fig. 7, on each sidewall of following wing base 52, form otch 57, thereby the central authorities on four jiaos of the stationary plane 15 of substrate 1 and each limit form than under the wide special-shaped part of counterpart area of stationary plane of wing base 52, bonding fillet is formed at these special-shaped part.

Perhaps, also can be among Fig. 7, being formed at the otch 57 of a sidewall of wing base 52 down to omit among the embodiment shown in the solid line, only the quadrangle at the stationary plane 15 of substrate 1 becomes special-shaped part 16～16 to form bonding fillet 62～62, perhaps, four jiaos of the stationary plane of base are made and the same shape of the stationary plane of substrate, only the central authorities on each limit of the stationary plane of substrate form special-shaped part, and form bonding fillet.

Claims

1. camera module, possess: be equipped with the 1st supporting member (2) of substrate (1), the support of lens (25,25) of imaging apparatus (11), screw togather with above-mentioned the 1st supporting member (2) and support above-mentioned the 1st supporting member (2) and be fixed in the 2nd supporting member (5) on the aforesaid substrate (1), this camera module can utilize above-mentioned the 1st supporting member (2) and the amount of screwing togather of above-mentioned the 2nd supporting member (5) to adjust the focal length of said lens (25,25), it is characterized in that:

At least one square in above-mentioned the 1st supporting member (2) and above-mentioned the 2nd supporting member (5) becomes across above-mentioned the 1st supporting member (2) and above-mentioned the 2nd supporting member (5) and can accept the recess (31) of ambient light, utilizes the ray hardening type adhesive (30) that is injected into above-mentioned recess (31) that above-mentioned the 1st supporting member (2) is fixed with above-mentioned the 2nd supporting member (5).

2. camera module as claimed in claim 1, it is characterized in that, recess (31) extends to the screw part of the 1st supporting member (2) and the 2nd supporting member (5), and the ray hardening type adhesive (30) that is injected into above-mentioned recess (31) has the high viscosity of the degree of the screw part that can not immerse above-mentioned the 1st supporting member (2) and above-mentioned the 2nd supporting member (5).

3. camera module as claimed in claim 2, it is characterized in that, the 1st supporting member (2) possesses: the male screw portion (26) that forms male thread at the outer peripheral face of cylinder, upper plate (22) with the upper end open portion obturation of this male screw portion (26), the 2nd supporting member (5) possesses: the box thread portion (53) that forms the box thread that can screw togather with the male thread of male screw portion (26) at cylindric inner peripheral surface, recess (31) is made of with a plurality of recesses (31) that uniformly-spaced form along circumferencial direction the periphery at above-mentioned upper plate (22), and this recess (31) extends to the box thread portion (53) of the 2nd supporting member (5).

4. camera module, possess: be equipped with the 1st supporting member (2) of substrate (1), the support of lens (25,25) of imaging apparatus (11), screw togather with above-mentioned the 1st supporting member (2) and support above-mentioned the 1st supporting member (2) and be fixed in the 2nd supporting member (5) on the aforesaid substrate (1), this camera module can utilize above-mentioned the 1st supporting member (2) and the amount of screwing togather of above-mentioned the 2nd supporting member (5) to adjust the focal length of said lens (25,25), it is characterized in that:

At least one side in above-mentioned the 1st supporting member (2) and above-mentioned the 2nd supporting member (5) uses light infiltration type material forming, the ray hardening type adhesive of the screw part by being injected into above-mentioned the 1st supporting member (2) and above-mentioned the 2nd supporting member (5) is fixed above-mentioned the 1st supporting member (2) with above-mentioned the 2nd supporting member (5).