JP2010054881A - Electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To fix the door with the unit by using a small number of components in an electronic device including a device body, a door provided to the body so as to be opened/closed, and a unit provided inside this door so as to be opened/closed it. <P>SOLUTION: A fixing lever 5 which has a first hook 52 triangular in cross-section at one end and a second hook 53 triangular in cross-section at the opposite end across a shaft 51 in between is attached to the transfer unit 3 in a manner turnable around the shaft 51. A pawl 18 is formed on the device body 1 to engage with the first hook 52 of the fixing lever 5, and a pawl 22 is formed on the door 2 to engage with the second hook 53 of the fixing lever 5. The door 2 and the transfer unit 3 are kept closed by engaging the first and second hooks 52, 53 of the fixing lever 5 with the pawl 18 of the body 1 and the pawl 22 of the door 2 respectively. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic apparatus, and more specifically, includes an apparatus main body, a door provided to be openable / closable with respect to the apparatus main body, and a unit provided within the door to be openable / closable with respect to the door. The present invention relates to an electronic device.

  In many conventional image forming apparatuses such as facsimiles, printers, and copiers, a door is provided on the apparatus body so that it can be freely opened and closed. The unit was removed from the main unit. Also, when a paper jam occurs in the apparatus, the door is opened to remove the jammed paper. For example, in the conventional image forming apparatus shown in FIG. 9, when the developing unit or the photosensitive unit is taken out from the apparatus main body 1 or when paper is jammed in the paper conveyance path, the door 2 is rotated clockwise about the shaft 21. The developing unit and the photosensitive unit are detached from the apparatus main body 1 or the paper jammed in the paper conveyance path is removed by rotating it to the open state.

  In addition, when a paper jam occurs in the double-side conveyance path 22 where the paper on which the image is formed on one side is turned upside down and conveyed again to the image forming unit in order to form images on both sides of the paper The transfer unit 3 attached to the door 2 is rotated counterclockwise about the shaft 35 to be in an open state, and the paper jammed in the double-side conveyance path 22 is removed. Further, when the transfer unit 3 is replaced with deterioration over time, the transfer unit 3 is removed from the door 2 and replaced with a new one.

In the apparatus in which the door 2 opens and closes with respect to the apparatus main body 1 and the transfer unit 3 opens and closes with respect to the door 2, conventionally, the apparatus main body 1 and the door 2 are fixed by the first fixing lever 61. The door 2 and the transfer unit 3 are fixed by the second fixing lever 62.
JP2007-91435

  However, providing a fixing lever for each of the members that open and close increases the number of parts and complicates the device configuration. In addition, when there are a plurality of fixing levers, the operation procedure becomes complicated and the operability becomes worse.

  Accordingly, the present invention has been made in view of such a conventional problem, and an object of the present invention is to provide an electronic device in which an openable door and a unit can be fixed with a small number of parts.

  According to the present invention, there is provided an electronic apparatus including an apparatus main body, a door provided to be openable / closable with respect to the apparatus main body, and a unit provided within the door to be openable / closable with respect to the door. A locking member having a first locking portion and a second locking portion is rotatably provided on the unit, and a first locked portion that engages with the first locking portion is provided on the apparatus body. And the door is provided with a second locked portion that engages with the second locking portion, and the first locking portion and the second locking portion of the locking member are connected to the first locked portion. By engaging with each of the second locked portions, the unit is held in a closed state with respect to the door, the door is held in a closed state with respect to the apparatus main body, and the locking member is By rotating, the door is changed from the closed state to the open state with respect to the apparatus main body, and the unit is changed from the closed state to the open state with respect to the door. Electronic device according to claim is provided.

  Here, from the viewpoint of convenience and operability, it is preferable that only one of the door and the unit can be opened from the closed state by the amount of rotation of the locking member.

  The unit may be a transfer unit, and the apparatus main body may be an image forming apparatus main body.

  In the electronic apparatus of the present invention, the door is held in the closed state with respect to the apparatus main body and the unit is held in the closed state with respect to the door by the locking member provided rotatably in the unit. As described above, since the door and the unit can be kept closed with one locking member, the number of parts can be reduced as compared with the conventional case. Further, the door and the unit can be opened and closed by operating one locking member, so that the operability can be improved.

  Hereinafter, an electronic apparatus according to the present invention will be described with reference to the drawings by using an image forming apparatus as an example, but the present invention is not limited to these embodiments.

  FIG. 1 is a schematic view of an image forming apparatus showing an embodiment of an electronic apparatus of the present invention. The image forming apparatus D in FIG. 1 is a so-called tandem color printer. Of course, in addition to a printer, the present invention can also be applied to a copying machine having a scanner, a facsimile, or a multi-function machine having these functions combined. Further, the image forming method is not limited to the tandem method, and other methods, for example, a monochrome method in which a monochrome image is created by one developing device may be used.

  As shown in FIG. 1B, the image forming apparatus D includes an apparatus main body 1, a door 2 that is rotatable about the shaft 21 on the apparatus main body 1, and a door 2 that is rotatable about the shaft 35. A transfer unit 3; The transfer unit 3 includes an endless conveyance belt 31 and a conveyance path that constitutes a part of the double-sided conveyance path 22. As shown in FIG. 1A, in a state in which the door 2 is closed, the conveyor belt 31 is located substantially at the center in a state where it is slightly inclined from the vertical direction. The conveyor belt 31 is stretched around two rotating rollers 33 and 34 and rotates clockwise. On the left side of the conveyance belt 31 is a print unit 11 that forms an image of each color of black, yellow, cyan, and magenta from upstream to downstream in the rotation direction of the conveyance belt 31 (from bottom to top in FIG. 1). It is provided side by side. Each print unit 11 is formed by combining a developing unit and a photosensitive unit. A transfer roller 32 is provided at a position facing the photosensitive drum 111 of each print unit 11 with the conveyance belt 31 interposed therebetween.

  The transfer paper is pulled out from a cassette (not shown) by the paper feed roller 12 and sent to the transport belt 31 through the transport roller 171. The transferred transfer paper is electrostatically adsorbed on the conveyor belt 31 and sequentially passes between the photosensitive drum 111 and the transfer roller 32 in each print unit 11. When passing between the photosensitive drum 111 and the transfer roller 32, a voltage having a polarity opposite to the charging polarity of the toner is applied to the transfer roller 32, and the toner image formed on the photosensitive drum 111 is transferred to the transport belt 31. Transferred to the upper transfer paper. Each time the toner passes through each print unit 11, the toner images of the respective colors are successively transferred onto the transfer paper, and a final toner image is formed on the transfer paper.

  The transfer paper on which the toner image is formed is then conveyed to the fixing device 15 where it is heated and pressed to fix the toner image on the transfer paper. The transfer paper that has passed through the fixing device 15 is discharged to the paper discharge tray 16 by the discharge roller pair 172.

  On the other hand, when images are formed on both sides of the transfer paper, the transfer paper that has passed through the fixing device 15 is sent to the double-sided conveyance path 22 by the discharge roller pair 172 and returned to the conveyance roller 171 again. Then, by the same operation as described above, an image is formed on the opposite surface of the transfer paper, and is discharged to the paper discharge tray 16 through the fixing device 15.

  FIG. 1B is a schematic diagram when the door 2 and the transfer unit 3 are opened. The door 2 is rotatable about the shaft 21 with respect to the apparatus body 1, and the transfer unit 3 is rotatable about the shaft 35 with respect to the door 2. For example, when the print unit 11 is pulled out from the apparatus main body, or when paper is jammed between the photoconductor 111 and the transfer belt 31, the door 2 is rotated clockwise to open the print unit 11, and the print unit 11 is pulled out or clogged. Remove the paper. When the paper is jammed in the duplex conveying path 22, the transfer unit 3 is rotated counterclockwise about the shaft 35 to be in an open state, and the jammed paper is removed. Furthermore, as will be described later, if the transfer unit 3 can be attached to and detached from the shaft 35, the transfer unit 3 can be replaced.

  FIG. 2 is a partially enlarged front view showing a fixed state of the apparatus main body 1, the door 2, and the transfer unit 3 by a fixing lever (locking member) 5, and FIG. 3 is a perspective view thereof. A substantially “h” -shaped fixing lever 5 is attached to the upper portion of the transfer unit 3 so as to be rotatable about a shaft 51. A first locking portion 52 having a triangular cross section is formed at one end of the fixed lever 5, and a second locking portion 53 having a triangular cross section is formed on the opposite side across the shaft 51. The other end of the tension spring S having one end connected to the transfer unit 3 is connected to the side of the fixed lever 5 on the side where the second locking portion 53 is formed. As a result, the fixing lever 5 is always urged clockwise and normally stops in contact with the stopper pin 37 formed on the transfer unit 3. In addition, the fixing lever 5 is provided with a pressing portion 54 for the user to release the engaged state.

  The device body 1 is formed with a claw portion 18 that engages with the first engagement portion 52 of the fixed lever 5, and the door 2 has a claw portion 22 that engages with the second locking portion 53 of the fixed lever 5. Is formed. When the first engaging portion 52 and the second engaging portion 53 of the fixing lever 5 are engaged with the claw portion 18 of the apparatus main body 1 and the claw portion 22 of the door 2, respectively, the door 2 and the transfer unit 3 are closed. Retained.

  FIG. 4 shows a process chart in which the engagement state by the fixing lever 5 is released and the door 2 and the transfer unit 3 are opened in the image forming apparatus having such a configuration. First, when the pressing portion 54 of the fixing lever 5 is pressed downward by the user, the fixing lever 5 rotates counterclockwise around the shaft 51 against the urging force of the pulling spring S (FIG. a)). As a result, the engagement between the first engaging portion 52 of the fixing lever 5 and the claw portion 18 of the apparatus main body 1 is released, and the door 2 together with the transfer unit 3 rotates clockwise about the shaft 21 (FIG. )). As a result, the door 2 is opened ((c) in the figure).

  Next, when the pressing portion 54 of the fixing lever 5 is further pressed, the fixing lever 5 further rotates around the shaft 51, and the engagement between the second engaging portion 53 of the fixing lever 5 and the claw portion 22 of the door 2. (Fig. 3 (c)). As a result, the transfer unit 3 rotates counterclockwise about the shaft 35 with respect to the door 2 and is in an open state ((d) in the figure). Here, for example, as shown in FIG. 5, if the support part of the shaft 35 of the transfer unit 3 of the door 2 is used as the notch part 23, the transfer unit 3 can be easily detached from the door 2 and replaced. it can.

  Note that the engagement between the first engagement portion 52 of the fixed lever 5 and the claw portion 18 of the apparatus main body 1 is first disengaged, and the engagement between the second engagement portion 53 of the fixed lever 5 and the claw portion 22 of the door 2. Next, the second engagement portion 53 of the fixed lever 5 and the claw portion 22 of the door 2 overlap in the rotation direction of the fixed lever 5 with respect to the first engagement portion 52 of the fixed lever 5. This is because it is longer than that of the claw portion 18 of the apparatus main body 1. That is, since the overlapping width of the first engaging portion 52 of the fixed lever 5 and the claw portion 18 of the apparatus main body 1 is short, the first engaging portion 52 and the claw portion 18 are engaged with each other by a slight rotation of the fixing lever 5. However, since the overlapping width of the second engaging portion 53 of the fixing lever 5 and the claw portion 22 of the door 2 is long, it is necessary to rotate the fixing lever 5 more greatly in order to release this engagement. is there. In other words, by adjusting the overlap width in the rotation direction of the fixed lever 5 between the engaging portion and the claw portion of the fixed lever 5, the timing at which the engaged state is canceled can be adjusted. For example, the overlapping width of the first engaging portion 52 of the fixing lever 5 and the claw portion 18 of the apparatus main body 1 is longer than the overlapping width of the second engaging portion 53 of the fixing lever 5 and the claw portion 22 of the door 2. Then, the door 2 is opened first, and the transfer unit 3 is opened next. The overlapping width of the first engaging portion 52 of the fixed lever 5 and the claw portion 18 of the apparatus main body 1 is the same as the overlapping width of the second engaging portion 53 of the fixed lever 5 and the claw portion 22 of the door 2. By doing so, the door 2 and the transfer unit 3 are simultaneously opened. However, in actual use, as shown in the above-described embodiment, the engagement between the first engagement portion 52 of the fixing lever 5 and the claw portion 18 of the apparatus body 1 is first disengaged, and then the second engagement of the fixing lever 5 is performed. 2 It is recommended to set so that the engagement between the engaging portion 53 and the claw portion 22 of the door 2 is disengaged.

  In order to change the door 2 and the transfer unit 3 from the open state to the closed state, a procedure reverse to the above-described procedure may be performed. That is, as shown in FIG. 6, the transfer unit 3 is rotated clockwise around the shaft 35 (FIG. 6A), and the second engaging portion 53 of the fixing lever 5 is moved to the claw portion 22 of the door 2. Engage (figure (b)). As a result, the transfer unit 3 is held closed with respect to the door 2. Next, the door 2 together with the transfer unit 3 is rotated counterclockwise about the shaft 21 (FIG. 3C), and the first engaging portion 52 of the fixing lever 5 is moved to the claw portion 18 of the apparatus main body 1. Engage (Figure (d)). Thereby, the door 2 is held in a closed state with respect to the apparatus main body 1. At the same time, as shown in FIGS. 3C and 3D, the pin 36 formed in the transfer unit 3 is engaged with the receiving groove 14 formed in the apparatus main body 1, whereby the door 2 is moved to the apparatus main body 1. Are held in a state where they are positioned with respect to each other.

  FIG. 7 is a front view showing another embodiment of the fixing lever used in the present invention, and FIG. 7 is a perspective view thereof. The fixing lever 5 ′ in this figure is provided in the transfer unit 3 so as to be rotatable about a shaft 51, and a first locking portion 52 having a triangular cross section is formed at one end, and the shaft 51 is separated from the fixing lever 5 ′. And a pulling spring S having one end connected to the transfer unit 3 on the side where the second locking portion 53 is formed and the side where the second locking portion 53 is formed. The other end is connected to the fixing lever 5 of the above-described embodiment, and is different from the fixing lever 5 of the above-described embodiment in that its outer shape is substantially “L”. Since the movement and action of the fixing lever 5 'are the same as those in the above embodiment, the description thereof is omitted here.

  In the electronic device of the present invention, the door and the unit can be kept closed with one locking member, so that the number of parts can be reduced as compared with the prior art, and the door and unit can be opened and closed by operating one locking member. It is possible to improve operability and is useful.

1 is a schematic diagram illustrating an example of an image forming apparatus according to the present invention. It is a schematic diagram of the fixed lever which holds a transfer unit and a door in a closed state. FIG. 3 is a perspective view of the fixing lever of FIG. 2. It is process drawing from which a door becomes an open state from a closed state. FIG. 6 is a process diagram in which a transfer unit is changed from a closed state to an open state. It is process drawing from which a transfer unit and a door are in a closed state from an open state. It is a front view which shows the other form of the fixing lever used by this invention. It is a perspective view of the fixing lever of FIG. It is a schematic diagram showing a conventional image forming apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Apparatus main body 2 Door 3 Transfer unit 5 Fixing lever (locking member)
D Image forming apparatus 18 Claw portion (first locked portion)
22 Claw (second locked part)
52 1st locking part 53 2nd locking part

Claims (3)

An electronic device including an apparatus main body, a door provided to be openable / closable with respect to the apparatus main body, and a unit provided inside the door to be openable / closable with respect to the door,
A locking member having a first locking portion and a second locking portion is rotatably provided in the unit,
The device main body is provided with a first locked portion that engages with the first locking portion,
The door is provided with a second locked portion that engages with the second locking portion,
The unit is closed with respect to the door by engaging the first locking portion and the second locking portion of the locking member with the first locked portion and the second locked portion, respectively. And holding the door in the closed state with respect to the apparatus body,
An electronic apparatus comprising: rotating the locking member to change the door from the closed state to the open state with respect to the apparatus main body, and changing the unit from the closed state to the open state with respect to the door.   The electronic device according to claim 1, wherein only one of the door and the unit can be opened from a closed state by an amount of rotation of the locking member.   The electronic apparatus according to claim 1, wherein the unit is a transfer unit, and the apparatus main body is an image forming apparatus main body.