JP2010107782A - Driving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus provided with an opening/closing detection mechanism that has a simple configuration and reduces composing parts and hence manufacturing cost. <P>SOLUTION: A driving device includes: an activating member; an elastic member that biases the activating member; a first drive member and a driven member, which is driven by the contact with the activating member; a second driving member; and a third driving member that presses a first arm and moves it from the retracting position where the leading end of the first arm is out of the drive locus of the first drive member to the activating position where the leading end overlaps the drive locus of the first driving member. When the first drive member is driven in the status that the activating lever is in the activating position by drive of the third drive member, the first drive member comes into contact with the first arm. When the second drive member is driven, the activating member is pressed, and rotated around the contact part of the first drive member and first arm as the fulcrum, thereby driving the target driven member. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a drive device that is driven under predetermined conditions.

  Conventionally, an open / close detection mechanism for detecting whether or not the open / close member is closed to the main body has been provided in order to prevent the main body from turning on and causing a malfunction when the open / close member is not closed to the main body. An image forming apparatus has been proposed.

  For example, Patent Document 1 proposes an image forming apparatus provided with an interlock device in which an interlock switch is turned off when any one of one exterior cover and two door covers is opened. Yes.

  However, the interlock device described in Patent Document 1 has a problem in that the manufacturing cost increases because the structure is complicated and there are many components.

Japanese Patent Laid-Open No. 10-162684

  The present invention has been made in view of the above-described conventional problems, and includes a drive unit including a detection mechanism that can reduce the manufacturing cost with a simple configuration and a reduced number of components, and the drive unit. It is an object to provide an image forming apparatus provided.

As a means for solving the above-mentioned problems, a driving means having a detection mechanism according to the present invention comprises: a long hole that fits into a shaft; a first arm portion that extends from the long hole toward the driven member; An actuating member rotatable about an axis having a second arm portion extending in a direction opposite to the first arm portion from the hole;
An elastic member for biasing the operating member;
A driven member driven by contact with the actuating member, a first driving member,
A second drive member;
The first arm is pressed to move from the retracted position where the tip of the first arm is outside the driving locus of the first driving member to the operating position overlapping the driving locus of the first driving member. 3 drive members,
When the first drive member is driven while the operating lever is in the operating position by driving the third drive member, the first drive member comes into contact with the first arm portion, and the second drive member is driven. Then, the actuating member is pressed, and the actuating member rotates around the contact portion between the first driving member and the first arm portion to drive the driven member.

  It can be detected that the first drive member has been driven by the third member pressing the first arm and moving it to an operating position that overlaps the drive locus of the first drive member.

  Furthermore, since the drive of the drive member is detected only by the actuating member, the elastic member, and the driven member, it is simple and configured with a small number of parts, and the manufacturing cost can be reduced.

  When the second drive member is driven while the operating lever is in the operating position by driving the third drive member, the second drive member comes into contact with the second arm portion, and the first drive member is driven. Then, it is preferable that the actuating member is rotated to rotate the actuating member around a contact portion between the second driving member and the second arm portion by pressing the actuating member to drive the driven member.

  As a result, regardless of the drive order of the first drive member and the second drive member, these drives can be detected.

  As one specific means, it is preferable that the first arm portion of the operating lever is connected to the elastic member.

  It is preferable that the safety switch is provided in the vicinity of the first arm portion.

  According to the image forming apparatus of the present invention, it is possible to detect the drive regardless of the drive order of the first drive member and the second drive member. Further, since the drive of the drive member is detected only by the actuating member, the elastic member, and the driven member, it is simple and configured with a small number of parts, and the manufacturing cost can be reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an image forming apparatus 1 according to one embodiment of the present invention. The image forming apparatus 1 includes a developing rotary unit 4 that holds a toner cartridge 3 that contains cyan, magenta, yellow, and black toner in an annular shape inside a main body 2 and a rotation that can form an electrostatic latent image on the surface. A third driving member that holds the intermediate transfer belt 8 onto which the image formed on the photosensitive member 5 is transferred by the possible photosensitive member 5, the charger 6 that charges the photosensitive member 5, the primary transfer roller 7, and the primary transfer roller 7. An imaging unit 9, an exposure unit 10 that exposes the photosensitive member 5, a secondary transfer roller 11, a fixing unit 12, and a paper feed unit 13.

  The imaging unit 9 includes a photoreceptor frame 14 that holds the photoreceptor 5, the charger 6, and the primary transfer roller 7, an intermediate transfer belt that holds the tension rollers 15 and 16 and the tension roller 17 that stretch the intermediate transfer belt 8. Frame 18. The photoconductor 5 is located outside the intermediate transfer belt 8, the primary transfer roller 7 is in contact with the inside of the intermediate transfer belt 8, and the photoconductor 5 and the primary transfer roller 7 are connected via the intermediate transfer belt 8. It is held so as to face each other.

  The imaging unit 9 can be attached to and detached from the image forming apparatus 1 by opening the lid 19 that is the first driving member of the main body 2 around the first shaft 20, and the photosensitive member 5 is developed in the mounted state. While facing one of the toner cartridges 3 of the rotary unit 4, the stretching roller 15 is pressed against the secondary transfer roller 11 via the intermediate transfer belt 8.

  As shown in FIG. 2, an operating lever 23 for turning on or off the safety switch 22 (see FIG. 3) is disposed on the side surface 2 b of the main body 2. As shown in FIG. 3, the operating lever 23 includes a long hole 26 that fits into a third shaft 24 provided in the main body 2, a first arm portion 27 that extends from the long hole 26 toward the lid 19, and a long hole 26. And a second arm portion 29 extending toward the opening / closing cover 28, which is a second driving member that rotates around a second shaft 28a provided on the main body front surface 2a. The first arm portion 27 of the operating lever 23 is biased upward by a spring 32 that is an elastic member that connects the frame 31 of the main body 2 and the first arm portion 27. The safety switch 22, the operating lever 23, and the spring 32 constitute an open / close detection mechanism 25.

  Further, the operating lever (operating member) 23 rotates around the third shaft 24 provided in the main body 2 and can move while the long hole 26 is fitted to the third shaft 24. The operating lever 23 can move according to the movement.

  A safety switch 22 which is a driven member is disposed below the operation lever 23. The safety switch 22 is a known limit switch. Further, a contact piece 22a extending outward is provided on the upper surface of the safety switch 22, and the safety switch 22 is turned on when the lower end of the elongated hole 26 of the operating lever 23 contacts the contact piece 22a. The

Next, operations of the operation lever 23 and the safety switch 22 will be described.
As shown in FIG. 3, when the opening / closing cover 28 is opened and the imaging unit 9 is removed from the main body 2, the first arm portion 27 of the operating lever 23 is biased upward by the spring 32. Reference numeral 23 is outside the rotation locus of the rib 19a which is the first protrusion provided on the lid 19 which rotates around the first shaft 20 (see FIG. 1). Further, the long hole 26 is positioned so as to face the contact piece 22 a of the safety switch 22. Since the operating lever 23 is outside the rotation locus of the rib 19a, the operating lever 23 rotates and is safe even when the lid 19 is opened and closed around the first shaft 20 in a state where the imaging unit 9 is detached from the main body 2. Since the switch 22 is not turned on, malfunction of the image forming apparatus 1 can be prevented.

  When the imaging unit 9 is attached to the main body 2 with the opening / closing cover 22 opened, the rib 9a that is an engaging portion provided in the imaging unit 9 and the upper surface of the first arm portion 27 come into contact with each other. Press down. As a result, the first arm portion 27 of the operating lever 23 pivots downward around the third shaft 24 and the entire operating lever 23 moves downward. As shown in FIG. It enters into the rotation locus of the rib 19a. Therefore, when the lid 19 is further closed to the main body 2, the lower edge surface 19b of the rib 19a abuts against the end of the first arm 27 and presses downward as shown in FIG. Rotate around 24. However, in this state, since the long hole 26 is not in contact with the contact piece 22a of the safety switch 22, the safety switch 22 is turned on with the open / close cover 28 opened, and the image forming apparatus 1 is activated. Can be prevented.

  When the opening / closing cover 28 is closed from the opened state with the lid 19 closed to the main body 2, the rib 28 b, which is a second protrusion provided on the opening / closing cover 28, is formed on the second lever of the operating lever 23 as shown in FIG. It contacts the end of the arm 29. As a result, the operating lever 23 is rotated so that the second arm portion 29 moves downward around the fulcrum 35 (see FIG. 4) while being in contact with the lower edge surface 19b of the rib 19a. By moving downward, the lower end of the long hole 26 presses the contact piece 22a, and the safety switch 22 is turned on. When the safety switch 22 is turned on, the image forming apparatus 1 starts warming up and enters a preparation stage for a printing operation.

  When the imaging unit 9 is mounted on the main body 2 and either the lid 19 or the opening / closing cover 28 is opened from the state where the lid 19 and the opening / closing cover 28 are closed, the operating lever 23 is moved in the direction opposite to the safety switch 22 by the spring 32. Therefore, the actuating lever 23 rotates and moves away from the safety switch 22 to release the engagement with the contact piece 22a. As a result, the safety switch 22 is turned off and the printing operation is stopped.

  In the embodiment, after the lid 19 and the opening / closing cover 28 are opened and the imaging unit 9 is detached from the main body 2, the imaging unit 9 is first attached to the main body 2, and then the lid 19 is closed to the main body 2. Although the opening / closing cover 28 is closed to the main body 2, the same effect as described above can be obtained by attaching the imaging unit 9 to the main body 2 and then closing the opening / closing cover 28 on the main body 2 and then closing the lid 19 on the main body 2. Is obtained. At this time, the operating lever 23 rotates around the fulcrum 36 (see FIG. 7) with the open / close cover 28 closed.

  Since the open / close detection mechanism 25 includes only the safety switch 22, the operation lever 23, and the spring 32, the open / close detection mechanism 25 is configured simply and with a small number of parts, and the manufacturing cost can be reduced.

  In addition, this invention is not limited to the said embodiment.

  The shape of the actuating lever 23 is not limited to the above-described embodiment as long as it can detect that the imaging unit 9 is mounted and can detect that the lid 19 and the opening / closing cover 28 are closed by the main body 2. For example, a shape in which the long hole 26 provided in the operating lever 23 is provided in the main body 2 and the third shaft 24 provided in the main body 2 is provided in the operating lever 23 may be employed.

  The spring 32 is not limited to the above-described embodiment as long as the operating lever 23 is urged out of the rotation locus of the rib 19a. For example, the structure which connects the 2nd arm part 29 and the flame | frame 31 of the action | operation lever 23 can also be employ | adopted.

1 is a schematic view of an image forming apparatus according to an embodiment of the present invention. FIG. 2 is a partially broken perspective view of the image forming apparatus of FIG. 1 provided with an open / close detection mechanism. The partial enlarged side view which shows the relationship between the rotation locus | trajectory of the lid | cover of the state which removed the imaging unit of FIG. 1, and an opening-and-closing detection mechanism. FIG. 3 is a partially enlarged side view showing a relationship between a rotation trajectory of a lid in a state where the imaging unit of FIG. 1 is mounted and an open / close detection mechanism. The partial expanded sectional view which shows the opening-and-closing detection mechanism of FIG. 4 of the state which closed the lid | cover. FIG. 6 is a partial enlarged cross-sectional view showing the open / close detection mechanism of FIG. 5 in a state where the open / close cover is closed. FIG. 4 is a partially enlarged cross-sectional view showing the open / close detection mechanism of FIG. 3 in a state where the open / close cover is closed before the imaging unit is mounted.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image forming apparatus 9 Imaging unit (3rd drive member)
9a Rib (engagement part)
19 Lid (first drive member)
19a rib 20 first shaft 22 safety switch (driven member)
23 Actuating lever (actuating member)
24 Third shaft 25 Open / close detection mechanism 26 Elongated hole 27 First arm portion 28 Open / close cover (second drive member)
28a Second shaft 28b Rib 29 Second arm 32 Spring (elastic member)
35, 36 fulcrum

Claims (4)

Around the shaft having a long hole that fits into the shaft, a first arm portion that extends from the long hole in the direction of the driven member, and a second arm portion that extends from the long hole in a direction opposite to the first arm portion A pivotable actuating member;
An elastic member for biasing the operating member;
A driven member driven by contact with the actuating member, a first driving member,
A second drive member;
The first arm is pressed to move from the retracted position where the tip of the first arm is outside the driving locus of the first driving member to the operating position overlapping the driving locus of the first driving member. 3 drive members,
When the first drive member is driven while the operating lever is in the operating position by driving the third drive member, the first drive member comes into contact with the first arm portion, and the second drive member is driven. Then, the actuating member is pressed, and the actuating member rotates to drive the driven member with a contact portion between the first driving member and the first arm as a fulcrum.   When the second drive member is driven while the operating lever is in the operating position by driving the third drive member, the second drive member comes into contact with the second arm portion, and the first drive member is driven. Then, the actuating member is pressed, and the actuating member rotates to drive the driven member with a contact portion between the second driving member and the second arm as a fulcrum. The drive device described in 1.   The drive device with a detection mechanism according to claim 1 or 2, wherein the first arm portion of the operating lever is coupled to the elastic member.   The drive device provided with the detection mechanism according to claim 1, wherein the driven member is provided in the vicinity of the first arm portion.

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