TWI398714B - Optical filter switching structure - Google Patents

Description

Filter switching structure

The present invention relates to a filter switching structure.

Most of the previous filter switching assemblies include a sliding seat on which a filter is mounted and a bearing that houses the sliding seat. The filter element is usually disposed on a circuit board on which the image sensor is located, and the circuit board needs to reserve a certain assembly pitch when assembled with the front cover of the camera, which is disadvantageous for the miniaturization design of the camera.

In view of this, it is necessary to provide a compact filter switching structure.

A filter switching structure includes a front cover, a sliding seat, a filter, a motor, a transmission gear, and a positioning plate. A limited position frame is disposed on the front cover. The limiting frame body comprises two parallel spaced first side edges, and the limiting frame body is provided with a lens through hole. The sliding seat includes a transmission side provided with a rack and at least two mounting holes arranged in parallel in a direction parallel to the first side. The filter is fixedly mounted in the mounting hole. The sliding seat is placed in the limiting frame such that the driving side is parallel to the first side of the limiting frame, and the first side is provided with a transmission gap. A light guiding through hole is defined in the corresponding lens through hole of the positioning plate. The positioning plate is fixedly connected to the front cover and covers the limiting frame. The transmission gear and the motor are respectively disposed outside the limiting frame corresponding to the transmission gap. The transmission gear extends from the transmission gap into the limiting frame to engage with the rack to drive the filter mounted on the sliding seat to slide in the limiting frame.

Compared with the prior art, the filter switching structure provided by the present invention uses a positioning plate to be installed with a filter. The sliding seat of the light sheet is sealed in the limiting frame of the front cover, and the filter mounted on the sliding seat is slid in the limiting frame by the motor and the transmission gear disposed outside the limiting frame to realize the switching filter. The function of the light sheet. Since the sliding seat on which the filter is mounted is directly disposed on the front cover, the assembly thickness of the filter switching structure and the front cover is reduced, which is advantageous for miniaturization.

1‧‧‧Filter switching structure

10‧‧‧ front cover

12‧‧‧Sliding seat

14‧‧‧Filter

16‧‧‧ Positioning board

18‧‧‧ drive

19‧‧‧Detection device

100c‧‧‧Motor fixed column

20‧‧‧ bolt

100e‧‧‧ positioning stud

100d‧‧‧ positioning plate fixing column

106c‧‧‧Transmission gear fixing column

106a‧‧‧ lens through hole

140‧‧‧Day filter

105‧‧‧ accommodating frame

160‧‧‧Fixed through holes

142‧‧ night filter

164‧‧‧Lighting through hole

162‧‧‧ Positioning through hole

190‧‧‧Detection board

164a‧‧‧Flexible compression department

190a‧‧‧Assemble through hole

192‧‧‧Flexible trigger mechanism

192a‧‧‧Touch

180‧‧‧Transmission gear

182‧‧‧ bearing

183‧‧‧ motor

183a‧‧‧Rotary axis

183b‧‧‧Rotating gear

100‧‧‧floor

106‧‧‧Boss

100a‧‧‧ inside bottom

104a‧‧‧ first side

105a‧‧‧Board fixing holes

104b‧‧‧Second side

106b‧‧‧round side

101‧‧‧ Transmission gap

102‧‧‧ side wall

104‧‧‧Limited frame

108‧‧‧ Guide plate

103‧‧‧Detection gap

122‧‧‧ second surface

120‧‧‧ first surface

124‧‧‧ drive side

124a‧‧‧Rack

126‧‧‧Sliding side

128‧‧‧Mounting holes

126a‧‧‧Sliding protrusion

128a‧‧‧Flange

126c‧‧‧Detection

1 is an exploded perspective view of a filter switching structure provided by an embodiment of the present invention.

2 is a schematic structural view of a front cover of the filter switching structure of FIG. 1.

FIG. 3 is a schematic structural view of a sliding seat of the filter switching structure of FIG. 1. FIG.

4 is a schematic view showing the assembly of the filter switching structure of FIG. 1.

FIG. 5 is a schematic diagram of a first switching state of the filter switching structure of FIG. 1. FIG.

6 is a schematic diagram of a second switching state of the filter switching structure of FIG. 1.

As shown in FIG. 1 and FIG. 2, an embodiment of the present invention provides a filter switching structure 1 which can be used in a camera, a camera, or the like, or a portable device having a shooting function to switch between different filters during shooting. The light sheet is thus adapted to the shooting requirements of different ambient light. The filter switching structure 1 includes a front cover 10, a sliding seat 12, a filter 14, a positioning plate 16, a driving device 18, a detecting device 19, and a plurality of bolts 20 for assembly.

The front cover 10 is a rectangular receiving housing, and includes a bottom plate 100 and a side wall 102 extending perpendicularly from the edge of the bottom plate 100 in the same direction. The bottom plate 100 includes an inner bottom surface 100a. The inner bottom surface 100a defines a limiting frame body 104. The limiting frame body 104 includes two parallel spaced first side edges 104a and a second side edge 104b. One end of the two first side edges 104a on the same side is vertically connected to one of the side walls 102, and the other end is perpendicularly connected to both ends of the second side 104b.

A boss 106 is protruded from a central portion of the inner bottom surface 100a. The opposite ends of the boss 106 extend through the two first side edges 104a. A lens through hole 106a is defined in a center of the boss 106. The boss 106 includes a pair of opposite arcuate sides 106b located in the limiting frame 104, and the two arcuate sides 106b respectively extend in a direction parallel to the first side 104a. A pair of spaced apart guide plates 108 are formed, the guide plates 108 being vertically connected to the side walls 102 and the second side edges 104b, respectively. The height of the first side 104a and the second side 104b in the direction of the vertical inner bottom surface 100a is greater than the height of the boss 106 and the guide plate 108 in the direction of the vertical inner bottom surface 100a.

A transmission gap 101 is defined in one of the first side edges 104a. The other first side 104a defines a detecting notch 103 which is offset from the transmission gap 101 by a certain distance. The length of the detecting notch 103 in the direction parallel to the first side 104a of the limiting frame 104 is greater than the sliding stroke of the sliding seat 12 during the switching process. An accommodating frame 105 is disposed on the bottom surface 100a adjacent to the detecting notch 103. A circuit board fixing hole 105a is disposed on an outer edge of the accommodating frame 105. The boss 106 is provided with a transmission gear fixing column 106c corresponding to one end of the transmission gap 101. Two motor fixing posts 100c are formed at a position on the bottom surface 100a adjacent to the transmission gear fixing post 106c.

Referring to FIG. 3 together, the sliding seat 12 is a rectangular flat plate including a first surface 120 in sliding contact with the limiting frame body 104, a second surface 122 parallel to the first surface 120, and parallel to each other. Drive side 124 and sliding side 126. The second surface 122 is disposed with at least two mounting holes 128 arranged in parallel in a direction parallel to the driving side surface 124, and the mounting hole 128 is disposed adjacent to the first surface 120 for receiving the The flange 128a of the filter 142. In the present embodiment, the filter 14 includes a daytime filter 140 and a nighttime filter 142, which are respectively disposed in different mounting holes 128 of the sliding seat 12. A rack 124a is disposed on the transmission side surface 124 of the sliding seat 12. The sliding side 126 of the sliding seat 12 is provided with a plurality of sliding The protrusion 126a, the end of the sliding protrusion 126a closest to the second side 104b on the sliding side 126 extends outwardly from a detecting protrusion 126c.

The drive device 18 includes a transmission gear 180, a bearing 182, and a motor 183. The motor 183 includes a rotating shaft 183a and a rotating gear 183b disposed at the end of the rotating shaft 183a. The rotating gear 183b meshes with the transmission gear 180. The motor 183 drives the transmission gear 180 to rotate by the rotating gear 183b.

The detecting device 19 includes a detecting circuit board 190 and an elastic trigger mechanism 192 disposed on the detecting circuit board 190. An assembly through hole 190a is defined in the detecting circuit board 190. The elastic trigger mechanism 192 includes a contact 192a. When the contact pole 192a is pressed, the elastic trigger mechanism 192 generates a detection signal.

The positioning plate 16 is a rectangular thin plate having rounded corners. The area of the positioning plate 16 is larger than the area of the limiting frame 104. A plurality of fixed through holes 160 are formed in the positioning plate 16 at positions adjacent to the four corners. A fixed through hole 160 on the inner bottom surface 100a of the front cover 10 corresponding to the positioning plate 16 is provided with a positioning plate fixing post 100d. The positioning plate 16 is further provided with a plurality of positioning through holes 162. The positioning through holes 162 of the inner bottom surface 100a of the front cover 10 corresponding to the positioning plate 16 are provided with positioning protrusions 100e. A light guiding through hole 164 is defined in the lens through hole 106a of the front cover 10, and one side of the light guiding through hole 164 extends inwardly from the elastic pressing portion 164a.

Referring to FIG. 4, FIG. 5 and FIG. 6, when the assembly is performed, the sliding seat 12 is placed in the limiting frame 104, so that the driving side 124 of the sliding seat 12 and the first The side 104a and the sliding side 126 are opposite to the two first sides 104a of the limiting frame 104, respectively. The first surface 120 of the sliding seat 12 is in contact with the boss 106 and the guide plate 108 extending from the boss 106. The sliding protrusion 126a on the sliding side 126 slides against the first side 104a, and the detecting protrusion 126c protrudes into the detecting notch 103.

The detecting device 19 is disposed in the accommodating frame 105, and the detecting circuit board is fixed in the accommodating frame 105 by the assembling through hole 190a and the bolt 20. The contact pole 192a of the elastic trigger mechanism 192 extends into the detecting notch 103 and is positioned at an end of the detecting notch 103 near the second side 104b.

The transmission gear 180 is rotatably coupled to the transmission gear fixing post 106c by a bearing 182 (see Fig. 1). A portion of the teeth of the transmission gear 180 extend into the transmission notch 101 to engage the rack 124a on the sliding side 124. The motor 183 is fixed to the front cover 10 by the motor fixing post 100c and the bolt 20, and the rotating gear 183b (see FIG. 1) on the motor 183 is engaged with the transmission gear 180.

The positioning protrusions 100e of the front cover 10 respectively penetrate the positioning through holes 162 of the positioning plate 16 so that the positioning plate 16 covers the limiting frame body 104. The fixing through hole 160 of the positioning plate 16 is aligned with the positioning plate fixing post 100d on the front cover 10, and the positioning plate 16 is fixed on the limiting frame 104 of the front cover 10 by bolts 20, The sliding seat 12 is thus positioned within the limiting frame 104. The elastic pressing portion 164a on the positioning plate 16 is pressed against the second surface 122 of the sliding seat 12 to further position the sliding seat 12 in the limiting frame 104.

When the filter is switched, the motor 183 slides the sliding seat 12 in the limiting frame 104 by the transmission gear 180 to bring the different filters 14 mounted on the sliding seat 12 to the front. The lens through hole 106a (see FIG. 2) of the cover 10 is opposed to each other, thereby realizing the function of switching the different filters 14.

During the sliding switching of the sliding seat 12, the detecting protrusion 126c on the sliding seat 12 moves between both ends of the detecting notch 103. When the detecting protrusion 126c moves to the end of the detecting notch 103 close to the second side 104b of the limiting frame 104, it touches the contact pole 192a in the detecting notch 103. The diode 192a triggers a detection signal and is transmitted to the camera by the detection circuit board 190. A central processing unit (not shown) is used to determine which filter 14 is currently being used by the camera.

The filter switching structure provided by the present invention seals the sliding seat on which the filter is mounted in the limiting frame on the front cover by using the positioning plate, and drives the sliding by the motor and the transmission gear disposed outside the limiting frame body. The seat slides inside the limit frame to realize the function of switching the filter. Since the sliding seat on which the filter is mounted is directly disposed on the front cover, the gap between the filter switching structure and the front cover is reduced, which can reduce dust or other foreign matter deposited on the filter, and is beneficial to Achieve the miniaturization of the camera.

Those skilled in the art should understand that the above embodiments are merely illustrative of the present invention and are not intended to limit the invention, as long as the scope of the present invention is Changes and modifications are intended to fall within the scope of the invention.

1‧‧‧Filter switching structure

10‧‧‧ front cover

12‧‧‧Sliding seat

14‧‧‧Filter

16‧‧‧ Positioning board

19‧‧‧Detection device

20‧‧‧ bolt

18‧‧‧ drive

100d‧‧‧ positioning plate fixing column

100c‧‧‧Motor fixed column

106a‧‧‧ lens through hole

100e‧‧‧ positioning stud

105‧‧‧ accommodating frame

106c‧‧‧Transmission gear fixing column

142‧‧ night filter

140‧‧‧Day filter

162‧‧‧ Positioning through hole

160‧‧‧Fixed through holes

164a‧‧‧Flexible compression department

164‧‧‧Lighting through hole

192‧‧‧Flexible trigger mechanism

190‧‧‧Detection board

180‧‧‧Transmission gear

190a‧‧‧Assemble through hole

183‧‧‧ motor

192a‧‧‧Touch

183b‧‧‧Rotating gear

182‧‧‧ bearing

190a‧‧‧Assemble through hole

Claims (10)

A filter switching structure includes a front cover, a sliding seat, a filter, a motor, a transmission gear and a positioning plate. The front cover is provided with a limited position frame, and the limiting frame body comprises two parallel spaced spaces. a first side, a lens through hole is formed in the limiting frame, the sliding seat comprises a transmission side provided with a rack and at least two mounting holes arranged in a direction parallel to the transmission side, the filter The light sheet is fixedly mounted in the mounting hole, and the sliding seat is placed in the limiting frame body such that the driving side surface is parallel to the first side edge of the limiting frame body, and the first side edge is provided with a transmission a notch, the corresponding lens through hole of the positioning plate is provided with a light guiding through hole, the positioning plate is fixedly connected with the front cover and covers the limiting frame body, and the transmission gear and the motor are respectively disposed corresponding to the transmission gap On the outer side of the limiting frame, the transmission gear extends from the transmission gap into the limiting frame to engage with the rack to drive the filter mounted on the sliding seat to slide in the limiting frame. The filter switching structure of claim 1, wherein the front cover comprises a bottom plate and a side wall extending perpendicularly from the edge of the bottom plate in the same direction, the bottom plate comprising an inner bottom surface, The limiting frame body is formed on the inner bottom surface, the limiting frame body includes two parallel spaced first side edges and a second side edge, and the same side ends of the two first side edges Vertically connected to one of the side walls, the other end is perpendicularly connected to both ends of the second side. The filter switching structure of claim 2, wherein the inner bottom surface is located at a central position of the limiting frame, and a boss is protruded, and the opposite ends of the protruding plate respectively penetrate to the two Outside the first side, a center of the boss defines a lens through hole, and the boss includes a pair of opposite arc-shaped sides in the limiting frame, and the two circular sides are Extending a pair of mutually spaced guide plates in a direction parallel to the first side, the guide The plate is vertically connected to the side wall and the second side, respectively. The filter switching structure of claim 3, wherein one of the first side edges is provided with a transmission gap, and the boss is provided with a transmission gear fixing column corresponding to one end of the transmission gap. Two motor fixing posts are formed on the bottom surface adjacent to the transmission gear fixing column, the motor includes a rotating shaft and a rotating gear disposed at an end of the rotating shaft, the transmission gear is rotatably coupled to the a drive gear fixing column, the motor is fixedly coupled to the front cover by the motor fixing post, the rotating gear meshes with the transmission gear, and a part of the teeth of the transmission gear protrude into the transmission Within the gap. The filter switching structure of claim 4, wherein the sliding seat further comprises a first surface in sliding contact with the limiting frame, a second surface parallel to the first surface, and a sliding side of the driving side parallel to each other, the mounting hole is disposed on the second surface, and a side of the mounting hole adjacent to the first surface is provided with a flange for bearing the filter a plurality of sliding protrusions are disposed on the sliding side surface, and when the sliding seat is placed in the limiting frame body, the driving side surface and the sliding side surface respectively face the two first side edges of the limiting frame body, A sliding protrusion on the sliding side slides against the first side. The filter switching structure of claim 5, wherein the filter switching structure further comprises a detecting device, wherein the detecting device comprises a detecting circuit board and an elasticity disposed on the detecting circuit board a trigger mechanism, the elastic trigger mechanism includes a touch electrode, and the elastic trigger mechanism generates a detection signal when the touch electrode is touched. The filter switching structure of claim 6, wherein the detecting circuit board has an assembly through hole, and the receiving frame is disposed at a position adjacent to the detecting gap on the inner bottom surface. A circuit board fixing hole is disposed on an outer edge of the accommodating frame, and the detecting device fixes the detecting circuit board in the accommodating frame by the assembling through hole and a bolt. The filter switching structure of claim 6, wherein the transmission gap is flat a detecting notch is formed on the opposite first side of the row, and the contact of the elastic triggering mechanism extends into the detecting notch and is positioned at an end of the detecting notch adjacent to the second side, and the sliding seat is closest to the second side An detecting protrusion extends outwardly from an end of the sliding protrusion, and the detecting protrusion extends into the detecting notch, and when the sliding seat moves to an end of the detecting notch adjacent to the second side, The detection of the bump pressure reaches the contact in the detection gap to trigger the detection signal. The filter switching structure of claim 2, wherein the positioning plate is a rectangular thin plate having a circular arc corner, and the area of the positioning plate is larger than the area of the limiting frame. A light guiding through hole is defined in the lens through hole corresponding to the lens cover on the front cover. The filter switching structure of claim 9, wherein one side of the light guiding through hole extends into the optical through hole to extend an elastic pressing portion, and the elastic pressing portion of the positioning plate The sliding seat is pressed to further position the sliding seat in the limiting frame.