CN210534784U - Integrated scanning head for scanning pen - Google Patents

Abstract

The utility model relates to an integrated scanning head for a scanning pen, which comprises a main body, a camera and a contact positioned at the lower part of the main body, wherein a cavity is formed inside the main body, a top cover is arranged at the upper part of the main body, a scanning pen electric connecting device is arranged between the top cover and the main body, the top cover and the main body are respectively detachably connected; the top of the top cover is provided with a touch rod which is used for triggering with a sensing device of the scanning pen, so that the scanning pen starts scanning; the scanning pen electric connecting device comprises an FPC and a golden finger connector located at the rear end of the FPC, the golden finger connector is used for being connected with a main controller of the scanning pen, and the camera is arranged at the front end of the FPC and contained in a positioning bin of the main body. The utility model discloses a first design of scanning head is stereotyped, need not pay close attention to the most difficult camera light path of design and coordination and expose LED lamp light path when all various wand designs from now on, ensures that the light path of wand design all is correct at every turn. In addition, the scanning head can be purchased, produced and stored specially, and is convenient for organizing mass production.

Description

Integrated scanning head for scanning pen

Technical Field

The utility model relates to an electronic equipment technical field, more specifically say, relate to an integration scanning head for wand.

Background

The scanning pen is also named as a miniature scanner or a hand-scraping type scanning pen, and images, tables, printed fonts and the like are directly scanned into the pen for storage or directly transmitted to a computer through a scanning technology, so that the operations of storage, reading, editing, modification and the like are performed, and the mobile office is convenient. At present, most of scanning pens adopt two trigger mechanisms, one trigger mechanism is shown in fig. 1a, a first touch rod 101 is arranged at the end of the scanning pen, when the pen point contacts a paper surface, the first touch rod 101 is compressed, a travel switch on a main circuit board is pushed to be closed, and a processor is informed of the start of scanning; when the pen point leaves the paper surface, the spring arranged inside enables the first feeler lever 101 to restore to the original position. Another trigger mechanism is as shown in fig. 1b, an integral sliding part 102 is arranged in the pen head, when the pen head contacts the paper surface, the integral sliding part 102 retracts into the pen shell, and simultaneously drives the contacts connected with the integral sliding part to push the travel switch to be closed, so as to inform the processor of the start of scanning; when the pen point leaves the paper surface, the integral sliding part 102 restores the original position along the specially arranged slide way under the action of the built-in spring.

The common feature of these two structures is that the internal trigger mechanism, spring and slide must be designed specifically for each style of stylus. Because the shape difference of each type of scanning pen is very large, the light paths of the camera and the exposure LED lamp are different, the design, the verification and the verification are complex, the time and the labor are wasted, and errors often occur.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the integrated scanning head for the scanning pen is suitable for various scanning pens and avoids the defects.

The technical solution of the utility model is that: the utility model provides an integrated scanning head for a scanning pen, which comprises a main body, a camera and a contact positioned at the lower part of the main body, wherein a cavity is formed inside the main body, a top cover is arranged at the upper part of the main body, a scanning pen electric connecting device is arranged between the top cover and the main body, the scanning pen electric connecting device and the top cover are respectively detachably connected;

the top of the top cover is provided with a touch rod which is used for triggering with a sensing device of the scanning pen, so that the scanning pen starts scanning;

the scanning pen electric connection device comprises an FPC and a golden finger connector located at the rear end of the FPC, the golden finger connector is used for being connected with a main controller of the scanning pen, and the camera is located at the front end of the FPC and contained in a positioning bin of the main body.

Furthermore, a positioning bin is arranged in the cavity and used for firmly assembling the camera, a dustproof sheet at the front part of the camera and EV cotton for filling at the rear part of the camera.

Furthermore, the two sides of the main body are provided with screw columns, and a positioning bin is arranged in the cavity and used for being tightly combined with the top cover through screws.

Furthermore, square holes are further formed in the positions, close to the upper portions of the screw columns, of the two sides of the main body and used for assembling the LED exposure lamps.

Furthermore, when the scanning pen sensing device is a travel switch, the retraction and exit of the scanning head during scanning trigger the on-off of the travel switch to inform the main controller of the start and stop of the scanning action.

Further, the screw holes on both sides of the top cover can accommodate springs for restoring the scanner head to the original position after retracting.

Furthermore, the lower part of the FPC forms two wings, and an exposure LED lamp is arranged on the two wings; two wings of the FPC are tightly attached to two sides of the upper portion of the main body, exposure LED lamps on two sides penetrate through the square hole, two wings of the lower portion of the top cover are tightly wrapped outside the FPC, and a screw penetrates through the screw hole and the screw column to enable the main body, the scanning pen electric connection device and the top cover to be fastened together.

Furthermore, when the scanning pen sensing device is a photoelectric switch driven by a PWM signal with a duty ratio of below 1/100, the retraction and the quitting of the scanning head during scanning trigger the on-off of the photoelectric switch to inform the main controller of the starting and the stopping of the scanning action.

Furthermore, a protective tube for preventing residual light of the LED lamp from entering the optical center of the camera is arranged on the periphery of the light hole in front of the camera.

Further, the lamp wick of the exposure LED lamp is positioned outside a connecting line between the optical center of the camera and the foot of the camera to the imaging plane.

Further, the intersection point of the main optical axis of the exposure LED lamp and the imaging surface is located in the front half part of the effective range L of the imaging surface.

Furthermore, the contact is of an integral sliding type, and the left first contact and the right first contact are exposed out of the shell at the bottom end of the scanning pen.

Furthermore, the contact is of a single-contact sliding type, and one of the left second contact and the right second contact is exposed out of the shell at the bottom end of the scanning pen.

Implement the utility model discloses an integration scanning head for wand has following beneficial effect: the first scanning head is designed and shaped, so that the camera optical path and the exposure LED lamp optical path which are difficult to design and coordinate are not required to be concerned when all types of scanning pens are designed in the future, and the optical path designed by each scanning pen is ensured to be correct. In addition, the scanning head can be purchased, produced and stored specially, and is convenient for organizing mass production.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

FIG. 1a is a schematic structural diagram of a stylus of a first trigger mechanism of a conventional stylus;

FIG. 1b is a schematic structural diagram of an integral sliding component of a second trigger mechanism of a conventional scanner pen;

fig. 2a is a schematic external view of an integrated scanning head according to the present invention;

fig. 2b is a schematic view of another angle of the integrated scanning head according to the present invention;

fig. 2c is an exploded view of the components of the integrated scanning head of the present invention;

fig. 2d is a cross-sectional view of the integrated scanning head of the present invention showing the internal structure;

FIG. 3a is a schematic view of the integrated scanner head of the present invention installed in a scanner pen;

FIG. 3b is a schematic view of the internal structure of the integrated scanner head of the present invention installed in the scanner pen;

FIG. 3c is a rear view of the integrated scanner head of the present invention installed in the interior of the scanner pen;

FIG. 4a is a schematic diagram of the position of an exposure lamp in the integrated scanner head according to the present invention;

FIG. 4b is another schematic diagram of the position of the exposure lamp in the integrated scanner head according to the present invention;

fig. 5a is a schematic view of an integrated scanning head of the present invention using a photoelectric switch as a touch mechanism;

fig. 5b is an electrical schematic diagram of a photoelectric switch used in the integrated scanning head of the present invention;

FIG. 6a is a schematic view of the integrated scanning head of the present invention designed as a slide-out type;

FIG. 6b is an assembly outline diagram of the integrated scanning head of the present invention designed as a one-piece slide-out type;

fig. 7a is an outline view of the integrated scanning head of the present invention designed as a single-contact type;

fig. 7b is an assembly outline of the integrated scanning head of the present invention designed as a single-contact type.

Detailed Description

Fig. 2a to 7b show a preferred embodiment of the integrated scanning head for a scanning pen according to the present invention, and the scanning head 200 has an external shape as shown in fig. 2a and 2 b. Figure 2c is an exploded view of the components of the scan head. As seen in fig. 2c, the scan head 200 is comprised of a body 202, a dust guard 206, a camera 208, EV fill cotton 211, a cap 212, screws 215, and springs 216. Wherein the body 202 is hollow, forming a cavity 201 therein (see fig. 1 a). The front part of the main body 202 is provided with a contact 203 extending out of the front end of the scanning pen, two sides of the main body are provided with screw columns 204 for fastening screws, and the top of the main body is provided with a positioning bin 205 for fixing a camera. To prevent dust from entering, the front of the camera 208 is provided with a dust-proof sheet 206, which are placed together in a positioning chamber 205 of the scanner main body 202. The back of the camera is pressed by EV cotton 211. Both wings of the FPC209 of the camera 208 contain exposure LED lamps 207, and a flexible Circuit board (FPC for short) can be freely folded and bent. After the camera 208 is mounted, both wings of the FPC209 are folded toward the front of the main body 202, two exposure LED lamps 207 are put into square holes 217 at both sides of the main body 202, and then the top cover 212 is covered. Finally, the components are fastened together by screws 215 to form a whole. The spring 216 is inserted directly into the tubular screw hole 213 on both sides of the top cover 212 and functions to reset the sliding scanner head 200.

Fig. 2d is a horizontal cross-sectional view of the scanner head 200, and it can be seen that in the assembled scanner head 200, the outer end face of the exposure LED lamp 207 faces the front of the cavity 201 of the body 202, illuminating the paper at the contact 203. In order to prevent the residual light of the exposure LED lamp 207 from entering the optical center 405 of the camera 208 to form interference on the image, a protective tube 218 is arranged around the light-transmitting hole in front of the dust-proof sheet 206.

The shape of the scanner head 200 when loaded into the scanner pen 300 is shown in fig. 3a, and only two contacts 203 are exposed from the scanner pen 300. Fig. 3b is a schematic diagram of the internal structure of the scanning pen. The FPC209 of the camera 208 of the scanner head 200 is inserted into the FPC connector 301 on the main circuit board 302 via the gold finger connector 210, and electrically connected to the main controller 303. The main circuit board 302 is also provided with a program and data memory 304 for loading program codes and data necessary for operation and control. The embodiment of the present invention shown in fig. 3b is provided with a wireless transmission module 306 inside for uploading the scanned image to the upper computer for subsequent processing. The wand 300 is also provided with a power key 307 and other necessary keys. The USB socket (or CType socket) 305 is used to charge the battery (see fig. 3c), perform system upgrade, and transmit data.

Fig. 3c illustrates the operation of the scanning head 200 during scanning. When the contact 203 of the scanner head 200 contacts the paper to start scanning, the whole scanner head 200 retracts into the scanner pen 300 along a slide (not shown) arranged inside, and the contact rod 214 integrated with the top cover 212 of the scanner head slides upwards to trigger the toggle button 310 of the travel switch 309 to close, so as to inform the main controller 303 to start scanning. When the scanning is finished, when the contact 203 of the scanning head 200 leaves the paper surface, the scanning head 200 slides outwards along the slide way under the action of the spring 216, and the scanning head returns to the original position. The contact rod 214 on the top cover 212 is also slid downward, and the toggle button 310 of the travel switch 309 is released, so that the travel switch is turned off, and the main controller 303 is informed of the end of scanning.

It should be noted that the arrangement of the components inside the wand 300 will vary with the devices and functional requirements, and does not limit the scope of the present invention. For example, if a host controller with built-in memory is used, the memory 304 will be integrated with the host controller 303. If the wand function requires a display, the display and its connector may be added, and so on.

The design of the optical path inside the scanning head 200 should follow the principles of fig. 4a and 4 b. As shown in fig. 4a, during scanning, the paper surface is attached to the inclined surface of the contact 203 of the scanner head 200, and the surface of the contact 203 is an image forming surface 401 of an image captured by the camera 208. The optical center 405 of the camera 208 has a line (actually a plane) 407 to its foot point 408 with the imaging plane 401. In order to prevent the light spot of the wick 406 of the exposure LED lamp 207 from being projected as a highlight in the image, the design must ensure that the wick 406 of the exposure LED lamp 207 is located outside the connecting line (surface) 407. Thus, the incident light 403 of the lampwick 406 of the exposure LED lamp 207 passes through the reflected light 404 within the effective range L of the imaging plane 401 without passing through the optical center 405 of the camera 208 to cause a highlight on the formed image.

The positioning of the exposure LED lamp 207 within the scan head 200 should also follow the rules of fig. 4 b.

Fig. 4b shows that the illumination of the imaging surface 401 by the exposure LED lamp 207 is not uniform, since the imaging surface 401 is not perpendicular to the main optical axis 409 of the exposure LED lamp 207. The farther from the optical center 406 of the exposure LED lamp 207 is illuminated with weaker light. In order to make the illumination of the imaging plane 401 as uniform as possible, the intersection point 410 of the main optical axis 409 of the exposure LED lamp and the imaging plane 401 is designed to be located in the first half L1 of the effective imaging range L, and it is generally preferable that the intersection point 410 is located at 3/4 of the effective imaging range L.

Fig. 5a shows a solution in which the travel switch 309 is replaced by an opto-electronic switch 501. The photoelectric switch 501 has the operation principle as shown in fig. 5b, and has an infrared transmitting tube 502 mounted inside one side and an infrared receiving tube 503 mounted on the other side. At ordinary times, the infrared transmitting tube 502 always emits infrared light, and the infrared receiving tube 503 is excited to generate an output current i, so that a voltage V is formed on the load resistor R. The main controller 303 detects the presence of V and considers that scanning is not started. When scanning is started, the contact rod 214 of the scanning head 200 protrudes into the photoelectric switch 501, and blocks the infrared light output from the infrared transmitting tube 502, so that the infrared receiving tube 503 cannot receive excitation light, and thus the output current i disappears, and the output voltage V disappears. The main controller 303 detects the disappearance of the output voltage V and regards it as the start of scanning. After the scanning is finished, the feeler 214 of the scanning head 200 retreats from the inside of the photoelectric switch 501, and the exciting light of the infrared transmitting tube 502 acts on the infrared receiving tube 503 again to generate the exciting current i, so that the voltage V across the load resistor R is restored again. The main controller 303 detects the reappearance of V as the end of the scan.

It should be noted that, since the infrared transmitting tube 502 is always in operation, the power consumption thereof has a large influence on the total power consumption in the standby state. In order to reduce the power consumption, the excitation voltage applied to the two ends of the infrared transmitting tube 502 is designed to be in a pulse modulation (PWM) mode, and if the duty ratio of the PWM is below 1/200-1/100, the power consumption can be basically ignored. The working principle of the device is described in detail in the utility model 201822099179.7, and is not described in detail here.

In use, some wand designs are suitable for sliding the entire wand out of the way by simply designing the contact 203 of the wand 200 to be the first contact 601 shaped as shown in figure 6a to mate with the housing of the wand 300, and not having to be modified elsewhere. Only the contacts 601 that mate with the housing are exposed after assembly.

Still other stylus designs may wish to extend only one contact, which may be accomplished by removing one of the two contacts from the second contact 701 as shown in fig. 7 a. The assembled shape is as in fig. 7b, with only one second contact 701 exposed outside the housing.

Use the utility model discloses an integrated scanning head for wand, scanning head one through the design, all needn't pay close attention to the most difficult camera light path of design and coordination and expose LED lamp light path when all various wand designs from now on, ensure that the light path of wand design all is correct at every turn. In addition, the scanning head can be purchased, produced and stored specially, and is convenient for organizing mass production.

The above description is only a preferred embodiment of the present invention, and many changes can be made in the detailed description and the application scope according to the idea of the present invention for those skilled in the art, which all belong to the protection scope of the present invention as long as the changes do not depart from the concept of the present invention.

Claims (10)

1. An integrated scanning head for a scanning pen comprises a main body (202), a camera (208) and a contact (203) positioned at the lower part of the main body (202), and is characterized in that a cavity (201) is formed inside the main body (202), a top cover (212) is arranged at the upper part of the main body (202), a scanning pen electric connection device is arranged between the top cover (212) and the main body (202), the scanning pen electric connection device and the top cover (212) are respectively detachably connected;

the top of the top cover (212) is provided with a contact rod (214) which is used for triggering with a sensing device of the scanning pen so as to enable the scanning pen to start scanning;

the scanning pen electric connection device comprises an FPC (209) and a golden finger connector (210) located at the rear end of the FPC (209), the golden finger connector (210) is used for being connected with a main controller of the scanning pen, and the camera (208) is arranged at the front end of the FPC (209) and accommodated in a positioning bin (205) of the main body (202).

2. The integrated scanning head of claim 1, wherein when the scanning pen sensing device is a travel switch (309), the retraction and exit of the scanning head (200) during scanning triggers the on/off of the travel switch (309), and informs the main controller (303) of the start and stop of the scanning operation.

3. The integral scanner head for a scanner pen of claim 2, wherein the screw holes (213) on both sides of the top cover (212) can accommodate a spring (216) for restoring the scanner head (200) to its original position after retraction.

4. The integral scan head of claim 3,

two sides of the main body (202) are provided with screw columns (204), and a positioning bin (205) is arranged in the cavity (201) and is used for being tightly combined with a top cover (212) through screws (215);

the positions, close to the upper part of the screw column (204), of the two sides of the main body (202) are also provided with square holes (217) for assembling exposure LED lamps (207);

the lower part of the FPC (209) forms two wings, and an exposure LED lamp (207) is arranged on the two wings; two wings of the FPC (209) are tightly attached to two sides of the upper portion of the main body (202), exposure LED lamps (207) on two sides penetrate through the square hole (217), two wings of the lower portion of the top cover (212) are tightly wrapped outside the FPC (209), and a screw (215) penetrates through the screw hole (213) and the screw column (204) to tightly fix the main body (202), the scanning pen electric connection device and the top cover (212) into a whole.

5. The integral scanner head of claim 4, wherein when the scanner sensing device is a photoelectric switch (501) driven by a PWM signal with a duty ratio of 1/100 or less, the retraction and ejection of the scanner head (200) during scanning triggers the on/off of the photoelectric switch (501), and informs the main controller (303) of the start and stop of the scanning operation.

6. The integral scanning head for a scanning pen according to claim 5, characterized in that the periphery of the light-transmitting hole in front of the camera (208) is provided with a protective tube (218) for preventing the residual light of the exposure LED lamp (207) from entering the optical center (405) of the camera (208).

7. The integrated scanning head for a scanning pen according to claim 6, characterized in that the lamp core of the exposure LED lamp (207) is positioned outside the line (407) connecting the optical center (405) of the camera (208) and the drop foot (408) thereof to the imaging plane (401).

8. The integral scan head for a wand according to claim 6 or 7, wherein an intersection point (410) of a main optical axis (409) of the exposure LED lamp (207) and the imaging plane (401) is located in the first half of the effective range L of the imaging plane.

9. The integral scanner head of claim 8, wherein the contact (203) is of a one-piece slide-out type, and the left and right first contacts (601) are exposed from the housing at the bottom end of the scanner.

10. The integral scanner head for a scanner pen as defined in claim 8, wherein the contact (203) is of a one-contact slide-out type, and one of the left and right second contacts (701) is exposed from a housing at the bottom end of the scanner pen.

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