CN100476564C - Shutter for optical device, and the optical device with the shutter - Google Patents
Shutter for optical device, and the optical device with the shutter Download PDFInfo
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- CN100476564C CN100476564C CNB2004800224187A CN200480022418A CN100476564C CN 100476564 C CN100476564 C CN 100476564C CN B2004800224187 A CNB2004800224187 A CN B2004800224187A CN 200480022418 A CN200480022418 A CN 200480022418A CN 100476564 C CN100476564 C CN 100476564C
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- fanning strip
- door opening
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- fast door
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Abstract
A shutter (1) for an optical instrument, comprising a plurality of sectors (10), (20), and (30) having engagement cam holes (12), (22), and (32), disposed rotatably around fixed shafts (11), (21), and (31), and opening/closing a shutter opening (4) and an operating member (5) engaged with the cam holes to move the sectors. The cam holes (12) and (22) are so formed that, when the sectors (10) and (20) are moved to a position where the shutter opening (4) is closed by the operating member (5), the moving directions of the sectors (10) and (20) can be changed. In this shutter (1), since the moving direction of the sectors (10) and (20) are changed when the sectors (10) and (20) are moved to the position where the shutter opening is closed, hunching does not occur when the sectors are stopped.
Description
Technical field
The present invention relates to the shutter that a kind of optical device is used.Specifically, the shutter that relates to optical devices such as being suitable for digital camera and video camera.
Background technology
About the shutter of camera, for example record to some extent in patent documentation 1.This patent documentation 1 discloses and has utilized stepping motor to drive the upward technology of these two fanning strips switchings of aperture blades and following aperture blades.Figure 14 is the figure of the action of expression patent documentation 1 disclosed fanning strip in the past.The 1st fanning strip 101 can rotate with respect to stationary shaft 102, and the 2nd fanning strip 107 can rotate with respect to stationary shaft 108.These fanning strips 101,107 are configured to and can move in the position that opening and closing are formed at the fast door opening 100 of shutter substrate.
Specifically, be provided with opening 103, be provided with opening 109 at the 2nd fanning strip 107 equally at the 1st fanning strip 101.The operative pin of swinging by not shown stepping motor 105 connects and is fastened in these openings 103,109.Thus, as shown in figure 14, operative pin 105 is moved to predetermined direction, thereby can control the position of two fanning strips 101,107, form the state of little aperture, full cut-off, standard-sized sheet.
Patent documentation 1: Japanese Patent Application Laid-Open 2000-39646 communique
In above-mentioned patent documentation 1 disclosed shutter, the opening 103,109 of the 1st fanning strip 101 and the 2nd fanning strip 107 all is simple shapes, the position of attended operation pin 105 is moved upward, and utilizes above-mentioned the 1st fanning strip 101 and the 2nd fanning strip 107 to form the state of little aperture, full cut-off, standard-sized sheet.And, make operative pin 105 when mobile, form state in contrast to this downwards from full-gear.Herein, full-shut position is present between little aperture state and the full-gear.
When certain position moved to other positions, inertial force (inertia) worked at each fanning strip 101,107.Utilizing the operative pin 105 that drives by stepping motor, make fanning strip 101,107 when little aperture position moves to full close position, perhaps make fanning strip 101,107 when fully open position moves to full close position, according to the braking of inertial force that acts on fanning strip and stepping motor side, produce vibration (hunting) sometimes.That is,, work so cross the power of rotating (overrun) from full close position (stop position) because inertial force acts on from mobile status and stops on the fanning strip 101,107 of full close position.On the other hand, for the rotation that makes motor stops at the precalculated position, the damping force of electric or magnetic acts on by on the stepping motor of electric control.Thus, at full close position, because the conflict of above-mentioned inertial force and damping force produces the state of fanning strip 101,107 in moving direction vibration (vibration).When fanning strip 101,107 like this during vibration, fanning strip is from predetermined full cut-off position deviation, becomes the state that light enters opening 100 (hereinafter referred to as exposure status again).Like this, adopting and reliably in the optical devices such as camera of the shutter of shield light, can not carry out suitable shooting at original full close position.
In addition, in above-mentioned patent documentation 1, utilize two fanning strips to form the state of little aperture, full cut-off, standard-sized sheet.But, use the 3rd fanning strip as little aperture usefulness, identical when utilizing 3 fanning strips to constitute, also there is the shutter that forms little aperture, full cut-off, full-gear.Like this, use the shutter of 3 fanning strips, when fanning strip moves, also produce aforesaid oscillation problem.
In addition, think and to suppress above-mentioned vibration by electric control at full close position.For example, known following technology when the driving stepping motor moves fanning strip, was carried the electric braking pulse, oppositely the driving of control step motor before fanning strip is about to stop.But compared with the past, nearest shutter speed is at a high speed, and braking wide cut regularly is extremely narrow and small.And there are a lot of deviations in shutter between the individual products when producing.And braking regularly to each shutter of producing in enormous quantities, adjustment is unpractical.Therefore, it is very difficult to utilize electric control to be suppressed at the vibration that full close position produces, and actual conditions are to be not easy to solve the above-mentioned problem of exposure again.
Summary of the invention
Therefore, the objective of the invention is to solve above-mentioned a plurality of problems in the past, a kind of optical device shutter of the vibration when utilizing simple structure can prevent that fanning strip from stopping to be provided.
Above-mentioned purpose is to reach with shutter by following optical device, and this optical device comprises with shutter: a plurality of fanning strips, and it has the cam hole of engaging usefulness, and is configured to and can rotates, and fast door opening is opened and closed; Be fastened on the functional unit that in the described cam hole described fanning strip is moved, described a plurality of fanning strip comprises single little aperture blades, the described cam hole of at least one fanning strip except described single little aperture blades in described a plurality of fanning strip forms, when this at least one fanning strip moved to the position of closing described fast door opening by described functional unit, the moving direction of this fanning strip was changed.
Can be achieved as follows structure according to the present invention, when predetermined fanning strip was closed the position of fast door opening in arrival, its moving direction was changed, so the vibration that produces can prevent to make the fanning strip that is in mobile status to stop reliably the time.Therefore, its moving direction is changed when being positioned at the shutter opening if a plurality of fanning strips are combined into, and the optical device shutter that can utilize simple structure can prevent described exposure problems more then can be provided.
Described fanning strip comprises blade, as long as this blade is formed with the cam hole shape, so that when it moves to the position of closing described fast door opening, the moving direction of this blade is changed to get final product.Like this, can not produce vibration from standard-sized sheet to full-shut position, shift swimmingly to full-shut position from little aperture.If described blade is positioned at same side for the position with respect to described fast door opening under full-gear and little aperture state, and sets described cam hole shape respectively, each fanning strip is moved.
And preferred described blade forms the cam hole shape, so as at described functional unit during a direction moves, described blade arrives and closes the position of fast door opening, and from this location change moving direction, avoids described fast door opening.Like this, during a direction moves, can utilize blade to form full-shut position and other states, can when full cut-off, suppress vibration at functional unit.And, when making functional unit mobile round about, can utilize blade to form equal state equally according to reverse procedure.
And, also can form, at described functional unit during a direction moves, described fanning strip moves, form full-gear, full-shut position, little aperture state successively, this fanning strip comprises blade, under each comfortable full-gear of described blade and the little aperture state, position with respect to described fast door opening is positioned at same side, described single little aperture blades is along with becoming full-gear, full-shut position, little aperture state and move to a direction towards described fast door opening, and described blade a little moves back and forth full-shut position as turning back.Under this situation, near fast door opening, blade only moves back and forth when full cut-off to be positioned at fast door opening single little aperture blades along with becoming standard-sized sheet, full cut-off, little aperture.Thus, can form the vibration when suppressing full cut-off, and make each fanning strip effectively move and form the optical device shutter of standard-sized sheet, full cut-off, little aperture state.
In addition, from described full-gear when described full-shut position shifts, also described single little aperture blades can be configured to cover the part of (filling in ぐ) described fast door opening prior to described blade.Like this, aperture blades plays a role when closing fast door opening, so can the quick closedown shutter.And at least one described blade can be configured to a part of covering described shutter opening under described little aperture state.Like this, can utilize blade to close fast door opening apace from little aperture state.In addition, preferred described functional unit constitutes by stepping motor and drives, and according to the order of full-gear, full-shut position, little aperture state described a plurality of fanning strip is moved according to position of rotation.
And, also can form, described fanning strip comprises two blades, these two blades are formed with the cam hole shape, so that when it moves to the position of closing described fast door opening, this blade moving direction is separately changed.Under this situation, utilize two fanning strips to form standard-sized sheet and full-shut position, when full cut-off, prevent the vibration of each fanning strip.And preferred described two blades are positioned at the position that described fast door opening is clipped in the middle when full-gear.Like this, can prevent vibration, and close fast door opening apace.
In addition, described fanning strip comprises a blade, and described blade is formed with the cam hole shape, so that when it moves to the position of closing described fast door opening, the moving direction of this blade is changed.Under this situation, when utilizing blade to form full-shut position, can suppress vibration, and can utilize two fanning strips to form standard-sized sheet, full cut-off and little aperture state.
In addition, also can constitute, follow moving of described functional unit, described blade and described single little aperture blades move, form full-gear, full-shut position, little aperture state successively, described blade and described single little aperture blades are positioned under full-gear described fast door opening are clipped in therebetween position, described single little aperture blades is along with becoming full-gear, full-shut position, little aperture state and move to a direction towards described fast door opening, and described blade a little moves back and forth full-shut position as turning back.Under this situation, can form following optical device shutter, that is, and the vibration when utilizing two fanning strip STRUCTURE DEPRESSION full cut-offs, and make each fanning strip effectively mobile, also can form little aperture state.
If form the shutter of said structure, then can not produce exposure status again, so, then can obtain distinct photographic images if contain the optical devices such as digital camera of this shutter.
The optical device shutter of the vibration that produces in the time of as mentioned above, can providing the inhibition fanning strip to move according to the present invention.
Description of drawings
Figure when Fig. 1 is fanning strip of expression driving (A) is the figure of expression prior art, (B) is expression figure of the present invention.
Fig. 2 is the figure of the situation of the shutter that relates to of expression embodiment 1 when being in full-gear.
Fig. 3 extracts the figure that the part of the structure that is comprised in the shutter shown in Figure 2 is represented.
Fig. 4 utilizes the synoptic diagram overlook the configuration relation of representing shutter substrate that shutter shown in Figure 2 has and stepping motor.
Fig. 5 is the figure of the situation of shutter when being in full-shut position of expression embodiment 1.
Fig. 6 is the figure of the situation of the shutter of expression embodiment 1 when being in little aperture state.
Fig. 7 is the situation of shutter is midway shifted in expression to full cut-off from full-gear figure.
Fig. 8 is the situation of shutter is midway shifted in expression to full cut-off from little aperture state figure.
Fig. 9 is the figure of the situation of shutter when being in full-gear of expression embodiment 2.
Figure 10 is the figure of the situation of shutter when being in full-shut position of expression embodiment 2.
Figure 11 is the figure of the situation of shutter when being in full-gear of expression embodiment 3.
Figure 12 extracts the figure that the part of the structure that is comprised in the shutter shown in Figure 11 is represented.
Figure 13 is the figure that is illustrated in the variation of the fanning strip in the time of can confirming to shift successively into full-gear, full-shut position, little aperture state in the shutter of embodiment 3.
Figure 14 is the figure that represents fanning strip action in the past.
Embodiment
Below, with reference to description of drawings best mode of the present invention.Before explanation the specific embodiment of the present invention, for the ease of understanding the present invention, the key concept that explanation is adopted in the present invention with reference to Fig. 1.Fig. 1 is that expression uses cam mechanism to drive the figure of the situation of a fanning strip, and Fig. 1 (A) represents prior art, and Fig. 1 (B) represents the present invention.
In Fig. 1 (A), fanning strip 150 can rotate around stationary shaft 151.Be formed with the cam hole 152 that engages usefulness at fanning strip 150, in this cam hole 152, engaging operative pin 155 as functional unit.Operative pin 155 moves in the position range of 155-3 in the position from 155 by not shown stepping motor.Under the situation of structure shown in this Fig. 1 (A), when making fanning strip 150 move to the centre position, carry out following operation, that is, drive stepping motor, make operative pin 155 move to the position of 155-2 and stop.
, as noted, inertial force acts on the fanning strip 150 of mobile status.Therefore, when fanning strip 150 arrived centre position (155-2), even operative pin 155 stops action, shown in arrow X, the power that will cross (overrun) this position worked.Relative therewith, because apply damping force, so produce vibration from the stepping motor side.Under the situation of cam structure shown in this Fig. 1 (A), the centre position is by point, if fanning strip 150 is not appended damping force from stepping motor, then can freely move to right-hand member.Like this, when mobile fanning strip 150 was stopped, the structure that fanning strip self can move on moving direction forwards, backwards just became the main cause that produces vibration.The fanning strip of aforementioned patent documentation 1 (with reference to Figure 14) is exactly this structure, so produce vibration.
With respect to above-mentioned Fig. 1 (A), the structure that Fig. 1 (B) expression the present invention relates to.The parts that comprised among Fig. 1 (B) constitute identical with Fig. 1 (A).That is, fanning strip 160 can rotate around stationary shaft 161.Be formed with the cam hole 162 that engages usefulness at fanning strip 160, on this cam hole 162, engaging operative pin 165.Operative pin 165 moves in the position range of 165-3 in the position from 165 by not shown stepping motor.
But under the situation of structure shown in this Fig. 1 (B), the shape of cam hole 162 forms, and arrives when utilizing the centre position that dotted line represents at fanning strip 160, and moving direction is changed to original Y direction (different directions).Therefore, can not produce the vibration of pointing out above.Particularly under the situation of Fig. 1 (B), fanning strip 160 self carries out the action that will return round about, compare so stop at the situation of the Fig. 1 (A) in centre position with the damping force of only utilizing stepping motor, can make fanning strip 160 stop at desired position (full close position) accurately.
The present invention adopts the fanning strip structure shown in Fig. 1 (B), carries out the driving of camera with shutter.For the ease of understanding, Fig. 1 (B) expression makes the situation of a fanning strip action, but by making up a plurality of fanning strips they is moved simultaneously, can suitably form standard-sized sheet, full cut-off and the aperture state of fast door opening.In addition, illustrative fanning strip 160 illustrates for the ease of understanding notion of the present invention among Fig. 1 (B), so may not be as being used for the fanning strip shown optimal shape of optical device with shutter.
And the cam hole 162 that is formed at this fanning strip 160 forms linearity, but its shape is not limited thereto.The shape of cam hole (being cam face) is with reference to the shape of fanning strip and make the radius of turn, moving range etc. of the position of the stationary shaft that fanning strip rotates and operative pin, for example can suitably be designed to linearity, curve-like etc., so that the fanning strip that makes as described above changes moving direction from half-way (for example full close position).
Embodiment 1
Below, the shutter of embodiment 1 is described with reference to the accompanying drawings.Fig. 2～Fig. 6 represents the shutter of embodiment 1.Fig. 2 is the figure of the situation of the shutter 1 that relates to of expression embodiment 1 when being in full-gear.Fig. 3 extracts the figure that the part of the structure that is comprised in the shutter 1 shown in Figure 2 is represented.Fig. 4 is the figure that utilizes the configuration relation of shutter substrate that the shutter overlook presentation graphs 2 has and stepping motor.Fig. 5 is the figure of the situation of expression shutter 1 when being in full-shut position.Fig. 6 is the figure of the situation of expression shutter 1 when being in little aperture state.
At first, in Fig. 2, this shutter 1 is the shutter that utilizes 3 fanning strips to constitute.Shutter 1 has shutter substrate 3 and 3 fanning strips 10,20,30.Fanning strip 10 is the 1st blades, and fanning strip 20 is the 2nd blades.Fanning strip 30 is the aperture blades with little diaphragm hole.,, utilize long dotted line to represent the relevant portion of the 2nd fanning strip 20 herein, utilize dotted line to represent the relevant portion of the 3rd fanning strip 30 in order to confirm to utilize solid line to represent the relevant portion of the 1st fanning strip 10 by each fanning strip easily.In addition, the central authorities at shutter substrate 3 are formed with fast door opening 4.
The 1st fanning strip 10 constitutes and can rotate around stationary shaft 11, has cam hole 12.The 2nd fanning strip 20 constitutes and can rotate around stationary shaft 21, has cam hole 22.The 3rd fanning strip 30 constitutes and can rotate around stationary shaft 31, has cam hole 32 and little aperture openings 33.Engaging operative pin (functional unit) 5 in above-mentioned 3 cam holes 12,22,32, the not shown from here stepping motor of this operative pin 5 drives in preset range.That is, 1 operative pin 5 connects 3 cam holes 12,22,32, and by means of moving of this operative pin 5, all fanning strips 10,20,30 all move to the precalculated position.
Fig. 3 extracts the figure that the structure of each several part shown in Figure 2 is represented in order to confirm easily.(A) expression the 1st fanning strip 10, (B) expression the 2nd fanning strip 20, (C) expression the 3rd fanning strip 30.(D) amplify the moving range of representing operative pin 5.The position of 5-1 is a fully open position shown in Figure 2.The position of 5-2 is a full close position shown in Figure 5 after this.The position of 5-3 is a little aperture position shown in Figure 6 after this.In this shutter 1, during a direction moves, utilize each fanning strip 10,20,30 to form the state of standard-sized sheet, full cut-off, little aperture at operative pin 5.Particularly at operative pin 5 during a direction moves, the 1st fanning strip 10 and the 2nd fanning strip 20 moving direction when being positioned at shutter opening 4 and forming full-shut position is changed.About this point, will be clearer and more definite according to the action specification of back.In addition, Fig. 3 (D) expression drives the stepping motor 7 of operative pin 5 and the arm 8 that extends from this stepping motor 7.Operative pin 5 is fixed on the other end of arm 8.Thus, when stepping motor 7 rotated in preset range, the operative pin 5 of arm 8 front ends was swung according to being shown in the preset range.
Fig. 4 utilizes the synoptic diagram overlook the configuration relation of representing shutter substrate 3 that shutter 1 shown in Figure 2 has and stepping motor 7.Stepping motor 7 has the U word shape stator 703 of rotor 702 and its periphery.Fig. 3 represents the end side of this stator 703.On this stator 703, twining two coils 704,705.These coils 704,705 by control circuit 706 drive controlling.
Though in this Fig. 4, can not confirm the position in hole, the 1st fanning strip 10 have be located at substrate 3 on the hole that engages of stationary shaft 11 and the hole that engages with operative pin 5 on the rotor 707 that is connected stepping motor 7.And, the 2nd fanning strip 20 have be located at substrate 3 on the chimeric hole of stationary shaft 21 and the hole that engages with aforesaid operations pin 5.Equally, the 3rd fanning strip 30 also have be located at substrate 3 on the chimeric hole of stationary shaft 31 and the hole that engages with aforesaid operations pin 5.These fanning strips 10,20,30 as previously described, the rotational action of attended operation pin 5 is being drawn track alone respectively and is being swung.The action of these fanning strips 10,20,30 will be clearer and more definite with reference to Fig. 5～Fig. 8 shown in the back.
On the rotor 707 of the stepping motor 7 of the rear side that is disposed at substrate 3, connecting the arm 8 that extends out at radial direction, be connected with the operative pin 5 that extends to opposition side by the fan shape opening 708 of being located at shutter substrate 3 sides from the end of this arm 8.Engaging the hole of being located at fanning strip 10,20,30 respectively being exposed on this operative pin 5 of front face side.Thus, when the rotor 707 of stepping motor 7 rotated, operative pin 5 was followed this rotation and is rotated, and fanning strip 10,20,30 is swung with projected path.
In this shutter 1, the 1st fanning strip 10 is designed to carry out the action identical with fanning strip illustrated in fig. 1 with the 2nd fanning strip 20.That is, the 1st fanning strip 10 and the 2nd fanning strip 20 are formed with the shape of cam hole 22 of shape, the 2nd fanning strip 20 of the cam hole 12 of the 1st fanning strip 10, so as when they to arrive full close position by means of moving of operative pin 5 the change moving direction.Describe with reference to Fig. 2 (standard-sized sheet), Fig. 5 (full cut-off) and Fig. 6 (little aperture).
Under full-gear shown in Figure 2, operative pin 5 is positioned at the left end of moving range, and at this moment, each fanning strip 10,20,30 moves to the position of opening fast door opening 4 according to the shape of cam hole 12,22,32.According to shown in Figure 5, when operative pin 5 moved to the position corresponding with full cut-off, each fanning strip 10,20,30 also moved to the position of closing fast door opening 4 then.At this moment, in this shutter 1, the position of the cam hole 12 of operative pin 5 and the 1st fanning strip 10 and the cam hole 22 of the 2nd fanning strip 20 relation has feature ground and changes.That is, fanning strip 10,20 is being directed near fast door opening 4 by means of the mobile of operative pin 5 when Fig. 2 (standard-sized sheet) is changed to Fig. 5 (full cut-off)., in case when arriving Fig. 5 (full cut-off) position, cam hole 12 and cam hole 22 just change with respect to the position relation of operative pin 5, the direction that the 1st fanning strip 10 and the 2nd fanning strip 20 continue to move thus becomes opposite direction, away from (avoiding) door opening 4 soon.Thus, fanning strip 10,20 can not vibrate as in the past, but stably the stop at Fig. 5 position of (full cut-off).
And, in this shutter 1, when the operative pin 5 that makes the full-shut position position that is in Fig. 5 continues to move right, discharge fast door opening 4 by means of the 1st fanning strip 10 that oppositely returns and the 2nd fanning strip 20.At this moment, the 3rd fanning strip 30 is positioned at fast door opening 4, thereby forms little aperture state.And, as described above, the 1st fanning strip 10 and the 2nd fanning strip 20 a little move back and forth full-shut position as turning back, but the 3rd fanning strip 30 is along with becoming full-gear, full-shut position, little aperture state, and move to a direction towards described fast door opening 4, finally form little aperture state.Thus, in this shutter 1, can utilize the operative pin 5 that moves to a direction to suppress vibration, and mobile effectively fanning strip, the state of formation standard-sized sheet, full cut-off, little aperture.
As mentioned above, there is full close position at an operative pin 5 midway in the shutter 1 of embodiment 1 to what a direction moved, but when arriving this full close position, the moving direction of the 1st fanning strip 10 and the 2nd fanning strip 20 changes, so when becoming full-shut position, that is, when making the 1st fanning strip 10 and the 2nd fanning strip 20 move to the position of closing fast door opening 4, can as in the past, not produce vibration.Thus, can not be created in the problem of exposure again of this full close position.Therefore, according to the optical devices such as digital camera of this shutter, can take distinct image as a part.And, in this shutter 1, can as in the past, not produce vibration, so can realize can not applying the structure of excessive load in the lump to the stepping motor that produces damping force.
In addition, Fig. 7 represents that from the figure of full-gear to the situation of full cut-off transfer above-mentioned shutter 1 midway, Fig. 8 is the situation of above-mentioned shutter 1 is midway shifted in expression to full cut-off from little aperture state figure.In this shutter 1, from full-gear when full cut-off moves, as shown in Figure 7, set little aperture blades 30 (fanning strip 30) for move in advance to the direction of closing fast door opening 4.That is, in this shutter 1, fanning strip 30 is carried out the action of a part of covering fast door opening 4 in advance than original fanning strip 10,20.This action can utilize the profile of fanning strip 30 and the shape of cam hole 32 to realize.In this shutter 1, become full-shut position shown in Figure 5 from the state of this Fig. 7.Like this, little aperture blades 30 of this shutter 1 and original blade 10,20 cooperative action form full-shut position.Thus, can close fast door opening 4 more quickly.
And Fig. 8 represents from little aperture state shown in Figure 6 state midway to full-shut position transfer shown in Figure 5.When being conceived to fanning strip 10,20, under the little aperture state of Fig. 6, these fanning strips are not in order to interfere with little aperture openings 33 and to avoid, but a part of covering fast door opening 4.Thus, in this shutter 1, can shift to full cut-off from little aperture state rapidly.That is, this shutter 1 has the structure of closing fast door opening 4 from little aperture state more quickly.
According to Fig. 9 and Figure 10 the embodiment 2 that the present invention relates to is described.In previous embodiment 1, comprise 3 fanning strips, one of them is little aperture blades.Present embodiment represents to utilize two blades to constitute the shutter 2 of fanning strip.The 1st fanning strip 50 constitutes and can rotate around stationary shaft 51, has cam hole 52.The 2nd fanning strip 60 constitutes and can rotate around stationary shaft 61, has cam hole 62.In above-mentioned two cam holes 52,62, engaging driven operative pin 5 in preset range.That is, in the present embodiment, an operative pin 5 connects two cam holes 52,62, and by means of moving of an operative pin 5, two fanning strips 50,60 move to the precalculated position.
In this shutter 2, the 1st fanning strip 50 and the 2nd fanning strip 60 are designed to carry out fanning strip action illustrated in fig. 2.That is, the 1st fanning strip 50 and the 2nd fanning strip 60 are formed with the shape of cam hole 62 of shape, the 2nd fanning strip 60 of the cam hole 52 of the 1st fanning strip 50, so as when to arrive full close position by means of moving of operative pin 5 the change moving direction.Thus, identical with the situation of embodiment 1, these fanning strips 50,60 are being directed near fast door opening 4 by means of the mobile of operative pin 5 when Fig. 9 (standard-sized sheet) is changed to Figure 10 (full cut-off)., in case when becoming Figure 10 (full cut-off) state, cam hole 52 and cam hole 62 just change with respect to the position relation of operative pin 5, the 1st fanning strip 50 and the 2nd fanning strip 60 become opposite direction by the direction that it continues to move, away from fast door opening 4.Thus,, fanning strip is stably stopped under the full-shut position, can not vibrate according to present embodiment.In addition, as shown in Figure 9, the 1st fanning strip 50 and the 2nd fanning strip 60 are positioned at the position that described fast door opening 4 is clipped in the middle when full-gear.By such design, when full cut-off, each fanning strip is approaching fast door opening 4 from both sides, so can rapidly it be closed.
According to the embodiment 3 that Figure 11～Figure 13 explanation the present invention relates to.Present embodiment and the foregoing description 2 are identical to be the shutter that utilizes two fanning strips to constitute.This shutter 70 has each one of blade and little aperture blades.Figure 11 is the figure of the situation of shutter 70 when being in full-gear of expression embodiment 3.Figure 12 extracts the figure that the part of the structure that is comprised in the shutter 70 of Figure 11 is represented.Figure 13 is the figure that is illustrated in the variation that can confirm the fanning strip when shifting to full-gear, full-shut position, little aperture state successively in the shutter 70.
The 1st fanning strip 80 constitutes and can rotate around stationary shaft 81, has cam hole 82 and little diaphragm hole 83.The 2nd fanning strip 90 constitutes and can rotate around stationary shaft 91, has cam hole 92.In above-mentioned two cam holes 82,92, identically with previous embodiment engaging operative pin (functional unit) 5, this operative pin 5 is being driven in preset range by not shown stepping motor.That is, an operative pin 5 connects two cam holes 82,92, and by means of moving of this operative pin 5, two fanning strips 80,90 move to the precalculated position.
Figure 12 extracts the figure that each several part structure shown in Figure 11 is represented in order to confirm easily.Figure 12 (A) represents the 1st fanning strip 80, and Figure 12 (B) represents the 2nd fanning strip 90.Fanning strip 80 is the aperture blades with little diaphragm hole 83, moves to the position of closing fast door opening 74 when full-shut position.And the 2nd fanning strip 90 has the area that can independently cover fast door opening 74.Figure 12 (C) amplifies the moving range of expression operative pin 5.The position of 5-A is the position of full-gear shown in Figure 11.Shown in Figure 13 after this, 5-B is the position of full-shut position, and 5-C is the position of little aperture state.
In addition, in Figure 12 (C), stepping motor 7 that drives operative pin 5 and the arm 8 that extends from this stepping motor 7 are shown.Operative pin 5 is fixed on the other end of arm 8.On shutter substrate 73, be formed with the opening 9 of fan-shaped, so that this operative pin 5 protrudes in face side from rear side.Thus, when stepping motor 7 rotated in preset range, the operative pin 5 of arm 8 front ends was according to swinging in the preset range that is shown in the fan-shaped opening 9.
In this shutter 70, during a direction moved, above-mentioned two fanning strips 80,90 were being drawn projected path and are being swung, and form full-gear, full-shut position, little aperture state successively at aforesaid operative pin 5.At this moment, the 1st fanning strip 80 demonstrates different actions with the 2nd fanning strip 90.The 1st fanning strip 80 with little diaphragm hole 83 is along with becoming full-gear, full-shut position, little aperture state, and moves to a direction towards described fast door opening 74.When little aperture state, little diaphragm hole 83 is positioned at fast door opening 74.
On the other hand, the 2nd fanning strip 90 be positioned at the position of the described fast door opening 74 of sealing, but along with become little aperture state from full-shut position, the 2nd fanning strip 90 moves in the mode of avoiding fast door opening 74 when full-gear becomes full-shut position.That is, the 2nd fanning strip 90 a little moves back and forth full-shut position as turning back.In addition, when operative pin 5 incoming terminals (the 5-C position among Figure 12 (C)) also returned thus, the 1st, the 2nd fanning strip 80,90 carried out and above-mentioned opposite action.
The position of stationary shaft 81,91 of each blade is supported in the action of above-mentioned fanning strip 80,90 by axle and the shape that is formed at the cam hole 82,92 of each blade limits.Particularly the cam hole 92 of the 2nd fanning strip 90 that full-shut position is a little moved back and forth as turning back forms, by means of moving of operative pin 5, and change moving direction when arriving full close position.More particularly, the shape of cam hole 92 is designed to, and when the position of fast door opening 74 was covered in 90 arrival of the 2nd fanning strip, the position transition of cam hole 92 was a predetermined direction, when operative pin 5 continued to advance, the 2nd fanning strip 90 became the state of avoiding from fast door opening 74.
The action of Figure 13 continuous representation this shutter with said structure 70 from full-gear to little aperture state.Describe with reference to this Figure 13.The full-gear that Figure 13 (A) expression is shown in Figure 11.Under this full-gear, operative pin 5 is positioned at the right-hand member (the 5-A position of Figure 12 (C)) of moving range, and at this moment, each fanning strip 80,90 moves to the position of opening fast door opening 74 according to the shape of cam hole 82,92.In addition, in this shutter 70, shown in this Figure 13 (A), fanning strip 80,90 is configured to fast door opening 74 is clipped in the middle, and is positioned at about it.
Then, shown in Figure 13 (B), at operative pin 5 when direction moves left from right-hand member, two fanning strips 80,90 from both sides near to close fast door opening 74.And, shown in Figure 13 (C), utilize two fanning strips 80,90 to form full-shut position.
Be described more specifically the full-shut position shown in this Figure 13 (C).The 2nd fanning strip 90 forms the size that can independently cover fast door opening 74.Thus, can only utilize this fanning strip 90 to close fast door opening 74.And when the 2nd fanning strip 90 moved to the position of closing fast door opening 74, the relationship characteristic ground, position of operative pin 5 and cam hole 92 changed.That is, when the 2nd fanning strip 90 is changed to Figure 13 (C) (full-shut position) in (full-gear) from Figure 13 (A), be directed near fast door opening 74 by means of the mobile of operative pin 5., in case when arriving (full-shut position) position of Figure 13 (C), the relation between operative pin 5 and the cam hole 92 is variation just.The direction that operative pin 5 continues to move becomes makes the direction of the 2nd fanning strip 90 away from fast door opening 74 (reinstatement).Thus, the 2nd fanning strip 90 stably stops at (full-shut position) position of Figure 13 (C), and can not vibrate.
And, in this shutter 70, when becoming full-shut position, have the 1st fanning strip 80 parallel the moving of little diaphragm hole 83 to cover fast door opening 74.As previously described,, move to the position of closing fast door opening 74, can shorten the time of covering, promptly realize the high speed of shutter speed by making the 1st fanning strip 80 though the 2nd fanning strip 90 can independently be closed fast door opening 74.In order to obtain this effect, in this shutter, the 1st fanning strip 80 and the 2nd fanning strip 90 are configured in the both sides of fast door opening 74, and fast door opening 74 is clipped in the middle.
As identifiable, carry out the action of closing assisted opening 74 though mainly utilize the 2nd fanning strip 90 to close fast door opening 74, the 1 fanning strips 80 from opposition side, so can realize the high speed of shutter speed by Figure 13 (B), (C).And, shown in Figure 13 (C), finish under the situation of full-shut position the 2nd fanning strip 90 independent states that cover fast door opening 74 that form.Therefore, even the little diaphragm hole of the 1st fanning strip 80 83 exists and a part of superposed part MT of fast door opening 74, owing to the 1st fanning strip 80 is closed fast door opening 74 fully, so the situation that light leaks can not take place.Thus, as long as the 1st fanning strip 80 has the area that can form little aperture state at least, so can form lessly.
And in shutter 70, when the full-shut position of Figure 13 (C) continued that direction moves left, shown in Figure 13 (D), the 1st fanning strip 80 continued to move towards fast door opening 74 in order to form little aperture state at operative pin 5.In contrast, the 2nd fanning strip 90 becomes the action that fast door opening 74 is turned back and avoids as terminal point.In Figure 13, utilize arrow R to represent the situation of change of the moving direction of the 1st fanning strip 80, utilize arrow L to represent the situation of change of the moving direction of the 2nd fanning strip 90.
At last, shown in Figure 13 (E), when operative pin 5 arrived left end, the little diaphragm hole 83 of the 1st fanning strip 80 was positioned on the fast door opening 74, forms little aperture state.At this moment, the 2nd fanning strip 90 moves to not the position of interfering with little diaphragm hole 83.
As mentioned above, this shutter 70 makes two fanning strips effectively mobile, in the process that a direction moves, forms full-gear, full-shut position, little aperture state at operative pin 5.Thus, can simplify the fanning strip structure.And when forming full-shut position, two fanning strip cooperative action are closed fast door opening 74, so can make the shutter speed high speed.And, when full cut-off, mainly be that the 2nd fanning strip 90 plays a role, the 1st fanning strip 80 carries out auxiliary movement, does not therefore need to control accurately the position of two fanning strips, so can simplified control system.In addition, the 2nd fanning strip 90 is formed with cam hole 92, so that change moving direction when becoming full-shut position.That is, the 2nd fanning strip 90 becomes reverse direction at full close position with moving direction, away from fast door opening 74.Thus, when being in full-shut position, can not exist fanning strip 90 to produce the problem of exposure again through fast door opening 74.Therefore, according to the optical devices such as digital camera of this shutter, can take distinct image as a part.
In addition, in previous embodiment 1, when standard-sized sheet becomes full cut-off, the moving direction of the 1st fanning strip 10 and the 2nd fanning strip 20 is changed to reverse direction, thereby prevents vibration.And the moving direction of the direction after this conversion when being changed to little aperture state from full cut-off is consistent.Thus, can carry out standard-sized sheet, full-shut position, little aperture and even action in contrast to this reliably swimmingly.
And in present embodiment 2, for full cut-off and this two states of standard-sized sheet, when the standard-sized sheet from Fig. 9 became the full cut-off of Figure 10, the moving direction of the 1st fanning strip 50 and the 2nd fanning strip 60 was transformed to reverse direction.In shutter structure,, dispose the butt parts sometimes in order to limit the angle of inclination of fanning strip.When fanning strip is resisted against on these parts powerfully, rebounded sometimes or breakage powerfully.If adopt the structure of present embodiment 2, can obtain to suppress effect with the butt power of butt parts.
More than, be described in detail a preferred embodiment of the present invention, but the invention is not restricted to specific embodiment, can in the aim scope of the present invention of claims record, carry out various distortion, change.
Claims (13)
1. optical device shutter comprises: a plurality of fanning strips, and it has the cam hole of engaging usefulness, and is configured to and can rotates, so that fast door opening is opened and closed; Be fastened on the functional unit that in the described cam hole described fanning strip is moved, it is characterized in that,
Described a plurality of fanning strip comprises single little aperture blades, the described cam hole of at least one fanning strip except described single little aperture blades in described a plurality of fanning strip forms, when this at least one fanning strip moves to the position of closing described fast door opening by described functional unit, change the moving direction of this at least one fanning strip.
2. optical device shutter according to claim 1, it is characterized in that described fanning strip comprises blade, this blade is formed with the cam hole shape, so that when this blade moves to the position of closing described fast door opening, the moving direction of this blade is changed.
3. optical device shutter according to claim 2 is characterized in that, the described cam hole shape of described blade is set at respectively, and the position with respect to described fast door opening under full-gear and little aperture state is positioned at same side.
4. optical device shutter according to claim 2, it is characterized in that, the cam hole shape of described blade forms, at described functional unit during a direction moves, described blade arrives closes the position of fast door opening, and from this location change moving direction, to avoid described fast door opening.
5. optical device shutter according to claim 1 is characterized in that, at described functional unit during a direction moves, described fanning strip move into, form full-gear, full-shut position, little aperture state successively, this fanning strip comprises blade, wherein
Under each comfortable full-gear of described blade and the little aperture state, be positioned at same side with respect to the position of described fast door opening,
Described single little aperture blades is along with becoming full-gear, full-shut position, little aperture state and move to a direction towards described fast door opening,
Described blade a little moves back and forth full-shut position as turning back.
6. optical device shutter according to claim 5 is characterized in that, from described full-gear when described full-shut position shifts, described single little aperture blades covers the part of described shutter opening prior to described blade.
7. optical device shutter according to claim 5 is characterized in that, at least one described blade covers described shutter opening under described little aperture state a part.
8. according to each described optical device shutter in the claim 1～7, it is characterized in that, described functional unit is driven by stepping motor, and according to the order of full-gear, full-shut position, little aperture state described a plurality of fanning strip is moved according to position of rotation.
9. optical device shutter according to claim 1, it is characterized in that, described fanning strip comprises two blades, these two blades are formed with the cam hole shape, so that when they move to the position of closing described fast door opening, described blade moving direction is separately changed.
10. optical device shutter according to claim 9 is characterized in that, described two blades are positioned at the position that described fast door opening is clipped in the middle when full-gear.
11. optical device shutter according to claim 1, it is characterized in that described fanning strip comprises a blade, described blade is formed with the cam hole shape, so that when this blade moves to the position of closing described fast door opening, the moving direction of this blade is changed.
12. optical device shutter according to claim 11 is characterized in that, follows moving of described functional unit, described blade and described single little aperture blades move, and form full-gear, full-shut position, little aperture state successively,
Described blade and described single little aperture blades are positioned at the position that described fast door opening is clipped in the middle under full-gear,
Described single little aperture blades is along with becoming full-gear, full-shut position, little aperture state and move to a direction towards described fast door opening,
Described blade a little moves back and forth full-shut position as turning back.
13. an optical device is characterized in that, comprises each described optical device shutter in the claim 1～12.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP283161/2003 | 2003-07-30 | ||
| JP2003283161 | 2003-07-30 | ||
| JP308149/2003 | 2003-08-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1833195A CN1833195A (en) | 2006-09-13 |
| CN100476564C true CN100476564C (en) | 2009-04-08 |
Family
ID=36994675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800224187A Expired - Fee Related CN100476564C (en) | 2003-07-30 | 2004-07-26 | Shutter for optical device, and the optical device with the shutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100476564C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4971257B2 (en) * | 2008-06-30 | 2012-07-11 | セイコープレシジョン株式会社 | Light amount adjusting device and optical apparatus |
| JP5759731B2 (en) * | 2011-01-21 | 2015-08-05 | 日本電産サンキョー株式会社 | Rotation drive |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000039646A (en) * | 1998-07-23 | 2000-02-08 | Canon Inc | Diaphragm and optical instrument provided with the same |
| US6123468A (en) * | 1993-08-17 | 2000-09-26 | Eastman Kodak Company | Magnetically biased electromagnetic shuttering device for controlling the shutter blades of a camera |
| JP2001033844A (en) * | 1999-07-15 | 2001-02-09 | Olympus Optical Co Ltd | Exposure adjusting device and electronic camera using the same |
| JP2001066660A (en) * | 1999-08-30 | 2001-03-16 | Nidec Copal Corp | Shutter device for camera |
| JP2001083568A (en) * | 1999-09-16 | 2001-03-30 | Seiko Precision Inc | Shutter for camera |
-
2004
- 2004-07-26 CN CNB2004800224187A patent/CN100476564C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6123468A (en) * | 1993-08-17 | 2000-09-26 | Eastman Kodak Company | Magnetically biased electromagnetic shuttering device for controlling the shutter blades of a camera |
| JP2000039646A (en) * | 1998-07-23 | 2000-02-08 | Canon Inc | Diaphragm and optical instrument provided with the same |
| JP2001033844A (en) * | 1999-07-15 | 2001-02-09 | Olympus Optical Co Ltd | Exposure adjusting device and electronic camera using the same |
| JP2001066660A (en) * | 1999-08-30 | 2001-03-16 | Nidec Copal Corp | Shutter device for camera |
| JP2001083568A (en) * | 1999-09-16 | 2001-03-30 | Seiko Precision Inc | Shutter for camera |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1833195A (en) | 2006-09-13 |
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| CI02 | Correction of invention patent application |
Correction item: Priority Correct: 2003.08.29 JP 308149/2003 False: Lack of priority second Number: 37 Page: The title page Volume: 22 |
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| COR | Change of bibliographic data |
Free format text: CORRECT: PRIORITY; FROM: MISSING THE SECOND ARTICLE OF PRIORITY TO: 2003.8.29 JP 308149/2003 |
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| C14 | Grant of patent or utility model | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20191106 Address after: Tokyo, Japan Patentee after: Seiko Sports Life Kabushiki Kaisha Address before: Chiba Prefecture, Japan Patentee before: Seiko Precision Inc. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090408 |