Locking device for paper taking mechanism
By using a locking device in the paper picking mechanism of a laser printer or scanner, and using the matching mechanism of the elastic arm and groove, the problems of increasing motor load and cost in the prior art are solved, and the stable locking of the paper picking mechanism is achieved and Unlocking improves user operation convenience.
Patent Information
- Application Number
- CN202323614458.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2033-12-27
AI Technical Summary
Prior art In the paper picking mechanism of laser printers or scanners, a compression spring or torsion spring is used to jamm the support of the paper picking mechanism, resulting in problems such as increasing motor load and increasing cost.
A locking device is designed, including an upper cover, an articulated paper picking bracket, a separation roller and a paper picking roller. The paper picking bracket is locked and unlocked by the squeezing of the elastic arm and the groove fitting, avoiding additional motors. Load and cost increase.
It enables effective locking and unlocking of the paper picking mechanism without increasing motor load and cost, ensuring that users can easily operate the printing paper or scan documents.
Smart Images
Figure CN222225457U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of image forming devices, in particular to a locking device for a paper taking mechanism. Background Art
[0002] The paper picking mechanism of a laser printer or scanner has multiple positions inside the machine. When the paper picking mechanism is at the bottom, it is in working state, contacting the paper / document and exerting a certain pressure; when the paper picking mechanism is at the top, it is in non-working state, breaking contact with the paper / document. The purpose is to facilitate users to push and pull the paper box to put in printed paper or scanned documents. Because the user has operating actions, the paper picking mechanism needs to be locked at the top position so that it will not fall easily, causing the user to be unable to operate normally.
[0003] The existing technical method is to use a compression spring / tension spring to pull it to the highest position after the working state is completed, or to use a torsion spring / leaf spring to clamp the bracket of the paper picking mechanism when the motor is reversed to the highest position. The method of pulling it to the highest position with a tension spring will increase the motor load, which is not conducive to motor selection; the method of clamping it with a leaf spring / torsion spring requires an additional component, which increases the cost. Utility Model Content
[0004] The utility model provides a locking device for a paper taking mechanism to solve the problems of increased motor load and increased cost caused by the prior art.
[0005] In order to alleviate the above technical problems, the technical solution provided by the utility model is:
[0006] A locking device for a paper picking mechanism, the locking device is installed on an image forming device, the locking device includes an upper cover; a paper picking bracket is hinged in the upper cover, and a separation roller and a paper picking roller are rotatably connected in the paper picking bracket; the paper picking bracket and the separation roller are located on the same rotating shaft; an elastic arm is fixedly connected in the upper cover, and a groove that cooperates with the separation roller is formed on the elastic arm; when the separation roller is reversed, the paper picking bracket swings so that the paper picking roller moves up and squeezes the elastic arm and then snaps into the groove of the elastic arm, thereby locking the paper picking bracket.
[0007] Furthermore, the ends of the separation roller and the paper pickup roller are both connected with gears; an idler wheel is rotatably connected inside the paper pickup bracket; and the two gears are meshed with the idler wheel.
[0008] Furthermore, it also includes a driving mechanism, which is used to drive the paper picking bracket to swing and the separation roller to rotate; the driving mechanism includes: a power source, the output end of the power source is connected to a driving shaft, and the driving shaft is connected to the separation roller; the paper picking bracket is connected to a shaft sleeve, the shaft sleeve is coaxially arranged with the separation roller, and a torque limiter is keyed on the shaft sleeve, and the torque limiter is coaxially arranged with the driving shaft and connected to each other; when the driving shaft rotates and does not exceed the torque limit of the torque limiter, the driving shaft can drive the paper picking bracket to swing; when the driving shaft rotates and exceeds the torque limit of the torque limiter, the driving shaft can drive the separation roller to rotate.
[0009] Furthermore, a left document block and a right document block are connected inside the upper cover; the left document block and the right document block are symmetrically arranged on both sides of the paper picking bracket.
[0010] Furthermore, a document detection swing rod is connected inside the upper cover.
[0011] Furthermore, an upper paper path and a lower paper path are connected in the image forming device; the upper paper path is used to place scanned documents; and the paper pickup roller can transport the scanned documents on the upper paper path to the lower paper path after moving downward.
[0012] Furthermore, a scanning roller is arranged on the lower paper path, and a scanning driven roller cooperating with the scanning roller is arranged in the image forming device.
[0013] Furthermore, a contact image sensor is arranged on the lower paper path.
[0014] Furthermore, a paper discharge roller is connected to the image forming device, and the paper discharge roller is arranged on the upper part of the lower paper path.
[0015] Furthermore, a separation sheet and a separation seat are connected in the image forming device, the separation sheet is located under the separation roller, and the separation seat is located under the separation sheet.
[0016] The beneficial effects of the utility model are analyzed as follows:
[0017] A locking device for a paper picking mechanism, the locking device is installed on an image forming device, and comprises an upper cover; a paper picking bracket is hinged in the upper cover, a separation roller and a paper picking roller are rotatably connected in the paper picking bracket; the paper picking bracket and the separation roller are located on the same rotating shaft; an elastic arm is fixedly connected in the upper cover, and a groove matching the separation roller is provided on the elastic arm; when the separation roller is reversed, the paper picking bracket swings so that the paper picking roller moves up and squeezes the elastic arm and then snaps into the groove of the elastic arm, thereby locking the paper picking bracket.
[0018] When it is necessary to place the printing paper, a reverse rotation force is applied to the separation roller, so that the separation roller has a tendency to rotate in the reverse direction. At this time, the paper picking bracket can swing upward with the separation roller as the center of the circle, so that the paper picking roller moves up. When the paper picking roller moves up, it squeezes the elastic arm, so that the elastic arm elastically deforms and swings in the direction away from the paper picking roller. When the paper picking roller moves up to the highest point of the stroke, the paper picking roller can adapt to the groove on the elastic arm. At this time, the elastic arm is deformed and swung in the direction of the paper picking roller, so that the paper picking roller is clamped in the groove on the elastic arm to complete the positioning, and the printing paper or the scanned document can be placed at this time; after the printing paper or the scanned document is placed, a forward rotation force is applied to the separation roller, so that the separation roller has a tendency to rotate forward, and the paper picking bracket can swing downward with the separation roller as the center of the circle, so that the paper picking roller pushes the elastic arm to deform and moves out of the groove of the elastic arm and then moves downward, and when the paper picking roller moves to the lowest point of the stroke, the device is in a working state, so it will not increase the motor load and will not increase the cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the related technologies, the drawings required for use in the specific implementation methods or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0020] Figure 1 It is a side cross-sectional view of the paper taking mechanism of the utility model;
[0021] Figure 2 This is a schematic diagram of the structure of the paper picking bracket of the utility model;
[0022] Figure 3 It is a structural schematic diagram of the upper cover of the utility model;
[0023] Figure 4 This is a schematic diagram of the structure of the paper picking bracket of the utility model installed on the upper cover;
[0024] Figure 5 It is a structural schematic diagram of the working state of the paper pickup roller of the utility model;
[0025] Figure 6 It is a structural schematic diagram of the paper pickup roller of the utility model being converted from a working state to a non-working state;
[0026] Figure 7 It is a structural schematic diagram of the paper pickup roller of the utility model changing from a non-working state to a working state;
[0027] Figure 8 It is a structural schematic diagram of the driving mechanism of the utility model;
[0028] Fig. 9 It is a structural schematic diagram of the torque limiter of the utility model.
[0029] icon:
[0030] 100, upper cover; 110, left document block; 120, right document block; 130, document detection rocker; 200, paper pick-up bracket; 210, separation roller; 220, paper pick-up roller; 230, elastic arm; 240, gear; 250, idler wheel; 300, power source; 310, drive shaft; 320, torque limiter; 330, bushing; 400, upper paper path; 410, paper ejection roller; 420, document cover; 430, separation sheet; 440, separation seat; 450, contact image sensor; 460, lower paper path; 470, scanning roller; 480, driven roller. DETAILED DESCRIPTION
[0031] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0034] Example
[0035] like Figure 1-Figure 9As shown, a locking device for a paper picking mechanism is installed on an image forming device, and the locking device includes an upper cover 100; a paper picking bracket 200 is hinged in the upper cover 100, and a separation roller 210 and a paper picking roller 220 are rotatably connected in the paper picking bracket 200; the paper picking bracket 200 and the separation roller 210 are located on the same rotating shaft; an elastic arm 230 is fixedly connected in the upper cover 100, and a groove matching the separation roller 210 is provided on the elastic arm 230; when the separation roller 210 is reversed, the paper picking bracket 200 swings so that the paper picking roller 220 moves up and squeezes the elastic arm 230 and then is clamped in the groove of the elastic arm 230, thereby locking the paper picking bracket 200.
[0036] The working mechanism of the locking device provided in this embodiment is as follows:
[0037] When it is necessary to place printing paper, a reverse rotation force is applied to the separation roller 210, so that the separation roller 210 has a tendency to rotate in the reverse direction. At this time, the paper pick-up bracket 200 can swing upward with the separation roller 210 as the center of the circle, so that the paper pick-up roller 220 moves up. When the paper pick-up roller 220 moves up, it squeezes the elastic arm 230, so that the elastic arm 230 elastically deforms and swings in the direction away from the paper pick-up roller 220. When the paper pick-up roller 220 moves up to the highest point of the stroke, the paper pick-up roller 220 can adapt to the groove on the elastic arm 230. At this time, the elastic arm 230 is deformed and recovers and moves towards the paper pick-up roller 220. The paper pick-up roller 220 is swung in the direction of rotation so that the paper pick-up roller 220 is clamped in the groove on the elastic arm 230 to complete the positioning. At this time, the printing paper or the scanned document can be placed. After the printing paper or the scanned document is placed, a positive rotation force is applied to the separation roller 210, so that the separation roller 210 has a tendency to rotate forward. At this time, the paper pick-up bracket 200 can swing downward with the separation roller 210 as the center of the circle, so that the paper pick-up roller 220 pushes the elastic arm 230 to deform and move out of the groove of the elastic arm 230 and then move downward. When the paper pick-up roller 220 moves to the lowest point of the stroke, the device is in working condition.
[0038] Among the optional methods of this embodiment, the more preferred ones are:
[0039] The ends of the separation roller 210 and the paper pickup roller 220 are both connected with gears 240 ; an idler wheel 250 is rotatably connected inside the paper pickup bracket 200 ; and the two gears 240 are meshed with the idler wheel 250 .
[0040] The idler wheel 250 and the gear 240 are arranged so that the separation roller 210 can drive the paper pickup roller 220 to rotate synchronously when rotating. The number of the idler wheels 250 is an odd number, so as to ensure that the paper pickup roller 220 can rotate at the same speed and in the same direction as the separation roller 210 .
[0041] Regarding how to drive the paper pick-up bracket 200 to swing, specifically:
[0042] It also includes a driving mechanism, which is used to drive the paper pick-up bracket 200 to swing and the separation roller 210 to rotate; the driving mechanism includes: a power source 300, the output end of the power source 300 is connected to a driving shaft 310, and the driving shaft 310 is connected to the separation roller 210; a shaft sleeve 330 is connected to the paper pick-up bracket 200, the shaft sleeve 330 is coaxially arranged with the separation roller 210, and a torque limiter 320 is keyed on the shaft sleeve 330, and the torque limiter 320 is coaxially arranged with the driving shaft 310 and connected to each other; when the driving shaft 310 rotates and does not exceed the torque limit of the torque limiter 320, the driving shaft 310 can drive the paper pick-up bracket 200 to swing; when the driving shaft 310 rotates and exceeds the torque limit of the torque limiter 320, the driving shaft 310 can drive the separation roller 210 to rotate.
[0043] The power source 300 provides the required torque and rotational power, the driving shaft 310 transmits the power of the power source 300 to other components, the shaft sleeve 330 is coaxially arranged with the separation roller 210, and is connected to the paper pick-up bracket 200, so as to transmit torque and provide support, and the torque limiter 320 is a device for limiting the torque output of the driving shaft 310, when the paper pick-up bracket 200 has not moved to the top and bottom of the stroke, the paper pick-up bracket 200 is not blocked, so that the force output by the driving shaft 310 at this time only overcomes the gravity of the paper pick-up bracket 200 and the connecting parts of the paper pick-up bracket 200, so that the torque of the torque limiter 320 is not exceeded at this time, and the driving shaft 310 at this time can drive the paper pick-up bracket 200 to swing; when the paper pick-up bracket 200 moves to the top and bottom of the stroke, the paper pick-up bracket 200 is blocked, so that this resistance action limits the continued movement of the paper pick-up bracket 200, and at this time, the driving shaft 310 continues to rotate to break through the torque limit of the torque limiter 320 and drive the separation roller 210 to rotate.
[0044] Among the optional methods of this embodiment, the more preferred ones are:
[0045] A left document block 110 and a right document block 120 are connected inside the upper cover 100 ; the left document block 110 and the right document block 120 are symmetrically arranged on both sides of the paper picking bracket 200 .
[0046] The left document block 110 and the right document block 120 form a symmetrical structure on both sides of the paper picking bracket 200 to improve the stability of the paper picking mechanism. The symmetrical setting of the left document block 110 and the right document block 120 can also ensure that the paper or the document to be scanned is subjected to uniform force during the paper picking process, avoiding the deviation or tilt of the paper or the document, thereby ensuring the accuracy and consistency of paper picking.
[0047] Among the optional methods of this embodiment, the more preferred ones are:
[0048] A document detection swing rod 130 is connected inside the upper cover 100 .
[0049] The document detection swing arm 130 can be used to detect the position and status of paper or documents to be scanned. Through the contact or position change between the document detection swing arm 130 and the paper or document, it can be determined whether the paper or document has been correctly placed in the paper picking mechanism, or whether the paper or document has completely entered the paper picking path, thereby ensuring the smooth progress of the paper picking process and avoiding problems such as paper picking failure or paper jam due to incorrect position of the paper or document. The document detection swing arm 130 can also provide parameters such as the width and length of the paper or document, which are used to further control the paper picking process and adjust the parameters of the equipment.
[0050] Among the optional methods of this embodiment, the more preferred ones are:
[0051] An upper paper path 400 and a lower paper path 460 are connected in the image forming device; the upper paper path 400 is used to place scanned documents; after the paper pickup roller 220 moves downward, the scanned documents on the upper paper path 400 can be transported to the lower paper path 460.
[0052] The upper paper path 400 is mainly used for placing documents that need to be scanned, while the lower paper path 460 is used for outputting or further processing the scanned documents. When the paper pickup roller 220 moves downward, it will contact the scanned documents in the upper paper path 400 and start to transport them from the upper paper path 400 to the lower paper path 460, ensuring that the documents can be transferred smoothly and accurately from the upper paper path 400 to the lower paper path 460, preparing for subsequent scanning or processing.
[0053] Among the optional methods of this embodiment, the more preferred ones are:
[0054] A scanning roller 470 is disposed on the lower paper path 460 , and a scanning driven roller 480 cooperating with the scanning roller 470 is disposed in the image forming device.
[0055] Not only is a scanning roller 470 provided on the lower paper path 460, but a scanning driven roller 480 cooperating with the scanning roller 470 is also provided in the image forming device to ensure smooth and accurate transmission during the scanning process, while improving the resolution and clarity of the scanning. The scanning roller 470 is mainly responsible for transmitting the scanned document to the lower paper path 460, while the scanning driven roller 480 cooperates with the scanning roller 470 to complete the scanning task together, ensuring that the document remains stable during the transmission process and avoiding the scanning quality being affected by vibration or jitter.
[0056] Among the optional methods of this embodiment, the more preferred ones are:
[0057] A contact image sensor 450 is provided on the lower paper path 460 .
[0058] A contact image sensor 450 is also provided on the lower paper path 460 . The contact image sensor 450 is used to capture and read image information of the scanned document and provide raw data for subsequent image processing and printing.
[0059] Among the optional methods of this embodiment, the more preferred ones are:
[0060] A paper discharge roller 410 is connected to the image forming apparatus and is disposed above the lower paper path 460 .
[0061] The paper discharge roller 410 can actively rotate to push the scanned paper or document from the lower paper path 460 to the outside. By cooperating with the lower paper path 460, the paper discharge roller 410 can ensure the smooth transmission of the paper or document and avoid jamming or wrinkles at the exit.
[0062] Among the optional methods of this embodiment, the more preferred ones are:
[0063] A separation sheet 430 and a separation seat 440 are connected in the image forming apparatus. The separation sheet 430 is located below the separation roller 210 , the separation seat 440 is located below the separation sheet 430 , and the document cover 420 is located below the lower paper path 460 .
[0064] The separation sheet 430 is located at the bottom of the separation roller 210 and is used in conjunction with the separation roller 210 to separate paper or documents from the paper feeding path. The edge of the separation sheet 430 is designed to be serrated or have other special shapes to increase the friction between the paper and help the paper to separate smoothly. The separation seat 440 is located at the bottom of the separation sheet 430 and provides stable support and positioning for the separation sheet 430. The separation seat 440 is fixedly connected to the separation sheet 430 to form an integral structure to ensure that the paper can get sufficient support and guidance when passing through the separation sheet 430 to avoid the paper from being offset or jammed during the separation process. The document cover 420 is located at the bottom of the lower paper path 460 to ensure that the document is effectively supported and protected during the transmission process to avoid document damage or position displacement due to external factors.
[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of each embodiment of the utility model.
Claims
1. A locking device for a paper picking mechanism, the locking device being installed on an image forming device, the locking device comprising an upper cover (100), characterized in that ； A paper pickup bracket (200) is hingedly connected inside the upper cover (100), and a separation roller (210) and a paper pickup roller (220) are rotatably connected inside the paper pickup bracket (200); The paper picking bracket (200) and the separation roller (210) are located on the same rotating shaft; An elastic arm (230) is fixedly connected inside the upper cover (100), and a groove cooperating with the separation roller (210) is provided on the elastic arm (230); When the separation roller (210) is reversed, the paper pick-up bracket (200) swings so that the paper pick-up roller (220) moves up and squeezes the elastic arm (230) before being clamped in the groove of the elastic arm (230), thereby locking the paper pick-up bracket (200).
2. The locking device for a paper picking mechanism according to claim 1, characterized in that ； The ends of the separation roller (210) and the paper pickup roller (220) are both connected to gears (240); An idler wheel (250) is rotatably connected inside the paper picking bracket (200); Both of the gears (240) are meshed with the idler gear (250).
3. The locking device for a paper picking mechanism according to claim 2, characterized in that ； It also comprises a driving mechanism, the driving mechanism being used to drive the paper picking support (200) to swing and the separation roller (210) to rotate; The driving mechanism comprises: a power source (300), the output end of the power source (300) is connected to a driving shaft (310), and the driving shaft (310) is connected to the separation roller (210); The paper picking bracket (200) is connected to a shaft sleeve (330), the shaft sleeve (330) is coaxially arranged with the separation roller (210), and a torque limiter (320) is key-connected to the shaft sleeve (330), the torque limiter (320) is coaxially arranged with the drive shaft (310) and connected to each other; When the driving shaft (310) rotates and does not exceed the torque limit of the torque limiter (320), the driving shaft (310) can drive the paper picking bracket (200) to swing; When the driving shaft (310) rotates and breaks through the torque limit of the torque limiter (320), the driving shaft (310) can drive the separation roller (210) to rotate.
4. The locking device for a paper picking mechanism according to claim 3, characterized in that; A left document block (110) and a right document block (120) are connected inside the upper cover (100); The left document block (110) and the right document block (120) are symmetrically arranged on both sides of the paper picking support (200).
5. The locking device for a paper picking mechanism according to claim 4, characterized in that ； A document detection swing rod (130) is connected inside the upper cover (100).
6. The locking device for a paper picking mechanism according to claim 1, It is characterized by: An upper paper path (400) and a lower paper path (460) are connected in the image forming device; The upper paper path (400) is used for placing scanned documents; After the paper pickup roller (220) moves downward, the scanned document on the upper paper path (400) can be transported to the lower paper path (460).
7. The locking device for a paper picking mechanism according to claim 6, characterized in that ； A scanning roller (470) is arranged on the lower paper path (460), and a scanning driven roller (480) cooperating with the scanning roller (470) is arranged in the image forming device.
8. The locking device for a paper picking mechanism according to claim 7, characterized in that ； A contact image sensor (450) is arranged on the lower paper path (460).
9. The locking device for a paper picking mechanism according to claim 8, characterized in that ； A paper discharge roller (410) is connected to the image forming device, and the paper discharge roller (410) is arranged on the upper part of the lower paper path (460).
10. The locking device for a paper picking mechanism according to claim 9, characterized in that ； A separation sheet (430) and a separation seat (440) are connected in the image forming device. The separation sheet (430) is located at the lower part of the separation roller (210), and the separation seat (440) is located at the lower part of the separation sheet (430).