Power switching device and image processing device with power switching device

A power switching device includes a translation mechanism, an active mechanism, and a transmission mechanism. The translation mechanism includes a rack. The active mechanism includes an active gear and a driver. The active gear connects with a first functional mechanism, and the driver drives the active gear to rotate in a first direction or a second direction. The transmission mechanism connects with a second functional mechanism. The active gear is switched between a first position and a second position. In the first position, the active gear is connected to the transmission mechanism and rotates in the first direction to drive the transmission mechanism to rotate, thereby driving the second functional mechanism to operate. In the second position, the active gear meshes with the rack and rotates in the first direction or the second direction to reciprocate on the rack so as to drive the first functional mechanism to operate.

FIELD

The application relates to a power switching device and an image processing device with the device.

BACKGROUND

An image scanning device with an automatic paper feeding device includes a flatbed scanning mechanism and an automatic paper feeding mechanism. These two mechanisms usually have their own power source to drive the flatbed scanning mechanism and the automatic paper feeding mechanism, but there is a problem of high cost.

SUMMARY OF THE DISCLOSURE

In view of this, it is necessary to provide a power switching device that can share the same power source for reciprocating translational motion and rotational motion.

An embodiment of the present application provides a power switching device for switching power between a first functional mechanism and a second functional mechanism, including:

A translation mechanism, including a rack;

An active mechanism including an active gear and a driver, the driver is connected to the active gear, the active gear is used to connect with a first functional mechanism, and the driver can drive the active gear to rotate in a first direction or a second direction opposite to the first direction;

A transmission mechanism for connecting with the second functional mechanism; and

A locking mechanism connected to the transmission mechanism for limiting the transmission mechanism to transmit in a single direction;

The active gear can be switched between a first position and a second position; in the first position, the active gear is connected to the transmission mechanism and rotates in the first direction to drive the transmission mechanism to rotate, thereby driving the second functional mechanism to operate; in the second position, the active gear meshes with the rack and rotates in the second direction to move on the rack, thereby being used for driving the operation of the first functional mechanism.

In one embodiment, the transmission mechanism includes:

A first transmission gear used to connect with the second functional mechanism and including a first toothing portion;

A second transmission gear coaxial with the first transmission gear and including:

A second toothing portion used to engage the first toothing portion to drive the first transmission gear to rotate;

A resilient member connected to the second transmission gear for pushing the second transmission gear in a direction away from the first transmission gear, so that the second transmission gear is separated from the active gear;

The active mechanism also includes:

A pushing member moving with the active gear. When the active gear moves to the transmission mechanism, it pushes the second transmission gear in the direction of the first transmission gear, so that the second transmission gear and the active gear are meshed, and the second toothing portion is engaged with the first toothing portion.

In one embodiment, the transmission mechanism further includes:

A fixed shaft, the first transmission gear, the second transmission gear and the resilient member are sleeved on the fixed shaft;

A pressing member sleeved on the fixed shaft and located on a side of the second transmission gear away from the resilient member and used for contacting the pushing member and pushing the second transmission gear;

A limiting member arranged at an end of the fixed shaft adjacent to the pressing member and used for limiting the first transmission gear, the second transmission gear, the resilient member and the pressing member.

In one embodiment, the pressing member is provided with an extension piece, and the extension piece extends in the direction of the pushing member. A side of the pressing member adjacent to the extension piece is provided with a curved surface. When the pushing member moves toward the pressing member, the pushing member causes the extension piece to slide relative to the curved surface to press the extension piece and push the second transmission gear toward the first transmission gear.

In one embodiment, one end of the extension piece adjacent to the pushing member is provided with a round corner to reduce friction.

In one embodiment, the locking mechanism includes a locking gear, a ratchet wheel, and a pawl. The locking gear is coaxially fixedly connected with the ratchet wheel, the locking gear meshes with the third transmission gear, and the pawl is used to restrict reversal of the ratchet wheel and the locking gear, thereby restricting the reversal of the transmission mechanism.

In one embodiment, the active mechanism further includes a worm gear and a worm. The worm gear is coaxially fixedly connected with the active gear, one end of the worm is connected to the driver, and the other end is engaged with the worm gear. The driver is used for driving the worm to rotate to drive the worm gear and the active gear to rotate.

An embodiment of the present application also provides an image processing device, including an image reading mechanism and a paper feeding mechanism, and further including:

A translation mechanism, including a rack;

An active mechanism including an active gear and a driver, the driver is connected to the active gear, the active gear is used to connect with a first functional mechanism, and the driver can drive the active gear to rotate in a first direction or a second direction opposite to the first direction;

A transmission mechanism for connecting with the second functional mechanism; and

A locking mechanism connected to the transmission mechanism for limiting the transmission mechanism to transmit in a single direction;

The active gear can be switched between a first position and a second position; in the first position, the active gear is connected to the transmission mechanism and rotates in the first direction to drive the transmission mechanism to rotate, thereby driving the paper feeding mechanism to operate; in the second position, the active gear meshes with the rack and rotates in the second direction to move on the rack, thereby being used for driving the operation of the image reading mechanism.

The above-mentioned power switching device and image processing device drive the active gear to rotate through the driver. After driving the first functional mechanism to complete reciprocal movement on the rack, the active gear moves off the rack to connect with the transmission mechanism to drive the second functional mechanism to rotate to achieve rotational movement. After completion, the active gear is reversed, and the locking mechanism restricts the reversal of the transmission mechanism, so that the active gear is moved back to the rack for translational movement. In this way, the purpose of switching between a reciprocating translational movement and a rotational movement of a power source is achieved.

SYMBOL DESCRIPTION OF MAIN COMPONENTS

DETAILED DESCRIPTION

The technical solutions of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the implementations of the present application, rather than all of the implementations.

It should be noted that when a component is referred to as being “fixed to” another component, it can be directly fixed or indirectly fixed to another component. When a component is considered to be “connected” to another component, it can be directly connected or indirectly connected to another component. When a component is considered to be “installed on” another component, it can be directly installed or indirectly installed on another component. The terms “vertical”, “horizontal”, “left”, “right” and similar expressions used herein are for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of this application. The terminology used in the specification of the application herein is only for the purpose of describing specific embodiments, and is not intended to limit the application. The term “or/and” as used herein includes any and all combinations of one or more related listed items.

An embodiment of the present application provides a power switching device for switching power between a first functional mechanism and a second functional mechanism, including:

A translation mechanism, including a rack;

An active mechanism including an active gear and a driver, the driver is connected to the active gear, the active gear is used to connect with a first functional mechanism, and the driver can drive the active gear to rotate in a first direction or a second direction opposite to the first direction;

A transmission mechanism for connecting with the second functional mechanism; and

A locking mechanism connected to the transmission mechanism for limiting the transmission mechanism to transmit in a single direction;

The active gear can be switched between a first position and a second position; in the first position, the active gear is connected to the transmission mechanism and rotates in the first direction to drive the transmission mechanism to rotate, thereby driving the second functional mechanism to operate; in the second position, the active gear meshes with the rack and rotates in the second direction to move on the rack, thereby being used for driving the operation of the first functional mechanism.

The above-mentioned power switching device and image processing device drive the active gear to rotate through the driver. After driving the first functional mechanism to complete reciprocal movement on the rack, the active gear moves off the rack to connect with the transmission mechanism to drive the second functional mechanism to rotate to achieve rotational movement. After completion, the active gear is reversed, and the locking mechanism restricts the reversal of the transmission mechanism, so that the active gear is moved back to the rack for translational movement. In this way, the purpose of switching between a reciprocating translational movement and a rotational movement of a power source is achieved.

In the following, some embodiments of the present application will be described in detail with reference to the accompanying drawings. If there is no conflict, the following embodiments and features in the embodiments can be combined with each other.

Referring toFIGS. 1 and 2, an embodiment of the present application provides a power switching device100for switching a power source between a first functional mechanism (translational movement) and a second functional mechanism (rotational movement). The power switching device100includes:

A translation mechanism includes a rack100a, and the position of the rack100ais fixed;

An active gear10awhich can mesh with the rack100ato convert its own rotation into translational reciprocating movement on the rack100a, and the active gear10ais used to connect with the first functional mechanism to realize the reciprocating translational movement of the first functional mechanism;

A driver10bwhich can drive the active gear10ato move along the rack100aat any time. The driver10bis connected to the active gear10afor driving the active gear10ato rotate in a first direction or a second direction opposite to the first direction. In one embodiment, the driver10bis a motor;

The transmission mechanism20is located outside one end of the rack100aand is used to connect with the second functional mechanism. After the active gear10afinishes a translational movement operation and is moved out of the end of the rack100a, the active gear10ais connected to the transmission mechanism20. At this time, when the driver10bcontinues to drive the active gear10ato rotate, the transmission mechanism20is used to transmit the rotation of the active gear10a, so that the second functional mechanism performs the rotation operation;

A locking mechanism30which is connected to the transmission mechanism20. After the active gear10acompletes the rotational movement operation and the driver10bdrives the active gear10ato rotate in a reverse direction, the locking mechanism30is used to restrict the transmission mechanism20to rotate in a single direction and not rotate in the reverse direction. When the transmission mechanism20is stuck and stops rotating, the rotation of the active gear10ais converted into translational motion, and the active gear10ais moved back to the rack100afor translational motion;

In one embodiment, the second functional mechanism includes a functional gear40, and the functional gear40is used to receive the rotation of the transmission mechanism20to realize the function of rotational motion.

The active gear10acan be switched between a first position and a second position. In the first position, the active gear10ais connected to the transmission mechanism20and rotates in a first direction to drive the functional gear40to rotate. In the second position, the active gear10ameshes with the rack100aand rotates in the first direction or a second direction to reciprocate on the rack100a.

A first transmission gear21meshing with the functional gear40(directly or indirectly), and a first toothing portion21ais provided on a side surface of the first transmission gear21;

A second transmission gear22arranged coaxially with the first transmission gear21, and a side of the second transmission gear22is provided with a second toothing portion22a(seeFIG. 6). The second toothing portion22ais used to mesh with the first toothing portion21a, so that the second transmission gear22drives the first transmission gear21to rotate;

The resilient member23is connected to the first transmission gear21and the second transmission gear22and is used to push the second transmission gear22away from the first transmission gear21, so that the second transmission gear22is separated from the active gear10a. In one embodiment, the resilient member23is a spring. A top of the second transmission gear22is flush with a height of the rack100a, which facilitates movement of the active gear10abetween the two.

Referring toFIGS. 4, 5, 6, and 7, the active mechanism10further includes a pushing member10c. The pushing member10cmoves with the active gear10a. When the active gear10amoves to the transmission mechanism20, the pushing member10cis used to push the second transmission gear22in the direction of the first transmission gear21, the resilient member23is compressed after pushing, the second transmission gear22meshes with the active gear10a, and the second toothing portion22ameshes with the first toothing portion21a. When the active gear10areverses and separates from the transmission mechanism20, the resilient member23releases an elastic force to push the second transmission gear22away from the first transmission gear21, and the second toothing portion22aseparates from the first toothing portion21a. A structural function of the first transmission gear21, the second transmission gear22, and the resilient member23is to facilitate a sensor (not shown) of the power switching device100to sense a position change of the active gear10a, so as to send a signal to other devices cooperating with the power switching device100. When the pushing member10ccompresses the resilient member23, the sensor senses that the active gear10astarts the rotational movement operation. When the pushing member10cseparates from the resilient member23, the sensor senses that the active gear10astarts the translational movement operation.

In one embodiment, the first toothing portion21aand the second toothing portion22aare wedge-shaped blocks. The first toothing portion21ahas two first wedge-shaped teeth, which are symmetrically arranged on a side of the first transmission gear21facing the second transmission gear22. Similarly, the second toothing portion22ahas two second wedge-shaped teeth, which are symmetrically arranged on a side of the second transmission gear22facing the first transmission gear21. After the first toothing portion21aand the second toothing portion22amesh and a vertical surface of the second wedge-shaped teeth press a vertical surface of the first wedge-shaped teeth, the second transmission gear22drives the first transmission gear21to rotate to realize a transmission function. When the active gear10arotates in the reverse direction, after the locking mechanism30locks the first transmission gear21and the second transmission gear22rotates in the reverse direction to a certain angle, a curved surface of the second wedge-shaped teeth is in contact with a curved surface of the first wedge-shaped teeth. Because of pushing by the pushing member10c, a distance between the second transmission gear22and the first transmission gear21is fixed, and the first wedge-shaped teeth hold the second wedge-shaped teeth, so that the second transmission gear22cannot rotate, and the active gear10ais moved back to the rack100a.

A fixed shaft24having a fixed position, and the first transmission gear21, the second transmission gear22, and the resilient member23are all sleeved on the fixed shaft24;

A pressing member25sleeved on the fixed shaft24and located on a side of the second transmission gear22away from the resilient member23for facilitating contact with the pushing member10cand pushing the second transmission gear22;

A limiting member26provided on one end of the fixed shaft24adjacent to the pressing member25and used to limit positions of the first transmission gear21, the second transmission gear22, the resilient member23, and the pressing member25to prevent them from sliding out of the fixed shaft24. In one embodiment, the limiting member26is a screw.

Referring toFIG. 3,FIG. 6, andFIG. 7, the pressing member25is provided with an extension piece25a. The extension piece25aextends out of the second transmission gear22in the direction of the pushing member10cto prevent the second transmission gear22from directly contacting the pushing member10c. A side of the pushing member10cadjacent to the extension piece25ais provided with a curved surface10c1. When the pushing member10cmoves toward the pressing member25, a top of the curved surface10c1first contacts the extension piece25a, and the curved surface10c1continues to translate so that the extension piece25aslides down relative to the curved surface10c1until contacting a bottom of the curved surface10c1, so that the extension piece25ais pressed during translation of the active gear10a, that is, the second transmission gear22is pushed toward the first transmission gear21. In one embodiment, the pushing member10cis in the shape of a sheet, and a plane of the sheet is perpendicular to the extension piece25a. One end of the extension piece25aadjacent to the pushing member10chas a round corner25a1to reduce friction.

Referring toFIG. 4andFIG. 5, the transmission mechanism20further includes a third transmission gear27. The third transmission gear27meshes with the first transmission gear21and the functional gear40for transmitting the rotation of the first transmission gear21to the functional gear40.

Referring toFIGS. 1 and 2, the locking mechanism30includes a locking gear31, a ratchet wheel32and a pawl33. The locking gear31and the ratchet wheel32are coaxially fixedly connected. The locking gear31meshes with the third transmission gear27. The pawl33is used to restrict the ratchet wheel32and the locking gear31from reversing to restrict the third transmission gear27from reversing, and thereby restrict the first transmission gear21and the second transmission gear22from reversing.

Referring toFIG. 1andFIG. 2, the active mechanism10further includes a worm gear10dand a worm10e. The worm gear10dis coaxially and fixedly connected with the active gear10a. One end of the worm10eis connected to the driver10b, and the other end engages the worm gear10d. The driver10bis used to drive the worm10eto rotate, and the worm10edrives the worm gear10dto rotate, which in turn drives the active gear10ato rotate. In one embodiment, the worm gear10dand the active gear10ajointly form a double gear.

Referring toFIG. 8, when the active gear10astarts to rotate counterclockwise on the rack100a, the active gear10awill move on the rack100atoward the transmission mechanism20until the active gear10ameshes with the transmission mechanism20.

Referring toFIG. 9, when the active gear10ameshes with the transmission mechanism20, the transmission mechanism20is driven to rotate clockwise and the third transmission gear27is rotated counterclockwise. Finally, the functional gear40is driven to rotate clockwise, and the locking mechanism30rotates clockwise idly.

Referring toFIG. 10, when the active gear10arotates clockwise, since the locking mechanism30is locked by the pawl33and cannot rotate counterclockwise, the third transmission gear27, the transmission mechanism20, and the functional gear40are also locked and unable to rotate, and the functional gear40stops. At this time, the active gear10acan only move toward the rack100ain the direction of the arrow.

Referring toFIG. 11, after the active gear10ameshes with the rack100a, the active gear10acontinues to rotate clockwise and moves away from the transmission mechanism20in the direction of the arrow.

Referring toFIG. 12, the present application also provides an image processing device200, including an image reading mechanism210, a paper feeding mechanism220and the power switching device100. The translation mechanism is connected to the image reading mechanism210. When the active gear10areciprocates on the rack100a, the image reading mechanism210is driven for scanning. The functional gear40is connected to the paper feeding mechanism220. When the scanning is completed, the active gear10amoves out of the rack100aand connects to the transmission mechanism20, and the active gear10adrives the functional gear40to rotate to drive the paper feeding mechanism220to feed paper. After the paper feeding is finished, the driver10bdrives the active gear10ato reverse rotate and move back onto the rack100afor reciprocating movement to scan the newly fed paper. The above-described operations are repeated to automatically scan multiple papers.

It is understandable that, in other embodiments, the third transmission gear27can be a structure composed of other numbers of engaged transmission wheels, such as adding a fourth transmission gear to engage the third transmission gear and the functional gear. The locking mechanism30can also be another structure. For example, in another embodiment, the ratchet wheel32and the pawl33can be replaced with a one-way bearing mounted to a rotation shaft of the locking gear31to realize one-way rotation.

The power switching device100and the image processing device200described above drive the active gear10ato rotate through the driver. After completing the reciprocating translation movement on the rack100a, the active gear10ais moved off the rack100aand connected to the transmission mechanism20to drive the functional gear40to rotate to achieve rotational movement. After completion, the locking mechanism30restricts the reverse rotation of the transmission mechanism20, so that the active gear10ais moved back to the rack100afor translational movement. In this way, a power source is switched between the reciprocating translational movement and the rotational movement, that is, switching power between scanning and feeding paper.

The above embodiments are only used to illustrate the technical solutions of the application and not to limit them. Although the application has been described in detail with reference to the above preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the application can be modified or equivalently replaced, and none should deviate from the spirit and scope of the technical solution of this application. Those skilled in the art can also make other changes within the spirit of this application, as long as they do not deviate from the technical effects of this application. These changes made according to the spirit of this application should all be included in the scope disclosed in this application.