JP2008255567A - Push latch device, recording device and liquid injection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a push latch device excelling in operation stability with a compact and simple structure with a small number of parts and capable of carrying out efficient guide operation of an engaging shaft without loss. <P>SOLUTION: The push latch device 21 comprises a push-in rod 23; a slider 24 integral with the push-in rod 23; an energizing spring 26 imparting a projecting tendency to the slider 24; a cam groove 27 of two-position holding loop shape for switchingly holding a projecting position and a retreating position of the push-in rod 23 by two continuous push-in operation of the push-in rod 23; and a swing arm 29 formed to engage a part of the free end side with the cam groove 27 and swinging around a swing fulcrum 50 provided on the base end side. The position of an axis L of the energizing spring 26 is set to a position shifted either to the right or left from the swing fulcrum of the swing arm 29. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a push latch device that can switch and hold a protruding position and a retracted position of a push rod by, for example, two successive pushing operations of the push rod, and an opening / closing device for a discharge stacker to which the push latch device is applied. The recording apparatus.

  Furthermore, the present invention relates to a liquid ejecting apparatus such as an ink jet recording apparatus that ejects (ejects) a liquid such as ink from a head thereof and performs recording (adhering liquid) on a recording material (liquid ejecting material). The present invention relates to a push latch device that can be applied to an opening / closing device of a discharge stacker provided for a liquid ejecting apparatus.

  Here, the liquid ejecting apparatus uses an ink jet recording head, and is not limited to a recording apparatus such as a printer, a plotter, a copying machine, and a facsimile machine that discharges ink from the recording head to perform recording on a recording material. Instead, it includes a device for ejecting a liquid corresponding to the application from a liquid ejecting head corresponding to the recording head to a liquid ejecting material corresponding to a recording material and attaching the liquid to the liquid ejecting material. Use.

  In addition to the recording head, as a liquid ejecting head, a color material ejecting head used for manufacturing a color filter such as a liquid crystal display, and an electrode material (conductive paste) used for forming an electrode such as an organic EL display or a surface emitting display (FED) Examples thereof include an ejection head, a bioorganic matter ejection head used for biochip production, and a sample ejection head as a precision pipette.

  Hereinafter, an ink jet printer which is an example of a liquid ejecting apparatus and a recording apparatus will be described as an example. In recent years, inkjet printers that are compact and convenient to carry, such as paper of 4 × 6 inches or less, have appeared. This ink jet printer is a so-called direct printer that can directly print image data taken by a digital camera or the like as a photograph by simply inserting a memory card or the like without being connected to a personal computer.

  In addition, in this type of ink jet printer, there is an ink jet printer having a flat rectangular box-like clean design in which no operation buttons or the like appear on the surface when not in use. In such an ink jet printer, the discharge stacker is folded upward when not in use, and constitutes a part of the front surface of the printer main body. Further, the operation panel provided on the upper surface of the printer main body is covered with a cover member that also functions as a tray support when the ink jet printer is not used. When using an ink jet printer, the cover member is provided in the printer body on the back side of the discharge stacker by rotating the cover member upward and pressing a predetermined button appearing on the upper surface of the printer body. The expansion lever that has been ejected is ejected to the discharge stacker side, and the discharge stacker is tilted forward to bring it into an expanded state before printing is performed.

  Accordingly, in order to allow the discharge stacker to be tilted toward the front so that printing can be started, the above-described cover member is lifted upward to open and a predetermined button on the operation panel is pressed to bring the discharge stacker to the front. Two actions, the action of defeating, were necessary, and handling was troublesome. In addition, the predetermined button on the operation panel and the discharge stacker are located apart from each other, and it is difficult to intuitively understand how to open and close the discharge stacker when using the inkjet printer for the first time. It was.

  On the other hand, when looking at TV racks and various storage shelves, racks and storage with door opening and closing devices that can be opened and closed simply by lightly pressing the surface of the door to be opened and closed. Shelf etc. are widely used. For such racks and storage shelves, door body opening and closing devices to which push latch devices as shown in Patent Documents 1 and 2 below are applied are used. Among these, Patent Document 1 discloses a door body opening and closing device that includes a push latch device provided with a hook-like hook member on the door body side and provided with a pair of left and right holding arms that sandwich the hook member on the main body side. ing.

  Further, Patent Document 2 discloses a door body opening / closing device including a push latch device provided with a tongue-shaped receiving member on the door body side and provided with a hook member to be engaged with the receiving member on the main body side. ing. If the door opening / closing device having such a configuration can be used as an opening / closing device for a discharge stacker of an inkjet printer, it is considered that the opening / closing operation of the discharge stacker becomes more intuitive and easy to understand. However, in the case of a portable inkjet printer that is portable, it is difficult to secure a large space for housing the push latch device, and a push latch device having a more compact structure is required.

  Further, since the back surface of the discharge tray is a mounting surface for stocking the printed and discharged paper, the hook-shaped hook member or tongue-shaped receiving member protruding from the mounting surface is used. The configuration of members or the like cannot be adopted. Further, in a state where the discharge stacker is expanded, the recessed portion on the front surface of the printer main body in which the discharge stacker is stored in the closed state is also an external component. Therefore, a large exposure of the holding arm or the hook member that impairs the appearance of the concave portion is not preferable.

  Turning to the structure of the push latch device itself, the push latch device is provided with a push rod that abuts against the back surface of the door body to push the door body forward, a slider integrated with the push rod, and the slider. Provided with a cam groove having a heart shape and an oscillating arm having an engaging shaft engaged with the cam groove and oscillating about an oscillating fulcrum, and the engaging shaft is always in a fixed direction. Two urging springs were provided: an urging spring for urging the swing arm in either the left or right direction and a urging spring for urging the slider in the protruding direction so as to be able to circulate. Accordingly, the provision of two urging springs increases the number of parts, which leads to an increase in the size of the push latch device.

In this type of push latch device, the engaging shaft of the swing arm may be disengaged from the cam groove due to malfunctions or external impacts. In such a situation, the push latch device has to be disassembled and repaired, which is very troublesome. In addition, the engaging shaft provided on the swing arm does not slidably contact all the inner and outer surfaces of the cam groove, but a part of the inner and outer periphery on the side where the swing arm is biased. It just slides on the surface. Therefore, the cam groove does not perform the guiding operation of the engaging shaft in a portion where the engaging shaft does not slide, and the configuration is not necessarily required.
JP-A-7-34746 JP 2006-307533 A

  The present invention has been made in view of the existence of the above-mentioned problems, and by reducing the number of parts by applying a biasing force in two directions to a single biasing spring, the push latch device can be downsized. It is an object of the present invention to provide a recording apparatus or the like including an opening / closing device for a discharge stacker to which the push latch device is applied.

  Also, simply repeating the pushing rod pushing operation can automatically return the engaging shaft disengaged from the cam groove into the cam groove, and execute an efficient and wasteful guiding operation of the engaging shaft. It is an object of the present invention to provide a push latch device that can be used, and to provide a recording device that includes an opening / closing device for a discharge stacker to which the push latch device is applied.

  In order to solve the above problems, a push latch device according to a first aspect of the present invention includes a push rod that abuts against an opposing surface of a movable body and pushes the movable body, a slider integrated with the push rod, and the slider A biasing spring that imparts a tendency to project, a multi-position holding loop-shaped cam groove that retains the projecting position of the push rod by switching the push rod repeatedly, and a free end in the cam groove. And a swing arm that swings about a swing fulcrum provided on the base end side, and the axial position of the urging spring is left and right from the swing fulcrum of the swing arm. The position is shifted in any direction.

  This aspect will be described as follows in a more specific example for easy understanding. That is, a pushing rod that abuts against the opposing surface of the movable body and pushes the opposing surface forward, a slider integral with the pushing rod, a biasing spring that imparts a tendency to project to the slider, and the pushing rod are continuous. A cam groove having a two-position holding loop shape that switches between a protruding position and a retracted position of the push rod by two push operations and holds the cam groove, and a portion of the free end side engages with the cam groove, and is provided on the proximal end A swing arm that swings about a swing fulcrum, and the axial position of the biasing spring is in a position shifted in either the left or right direction from the swing fulcrum of the swing arm. To do.

  According to the first aspect of the present invention, in addition to the urging force for urging the slider in the protruding direction, the urging force for oscillating the oscillating arm in either the left or right direction is a single urging spring. Will come from. Therefore, it is possible to reduce the size of the push latch device by reducing the number of parts.

The push latch device according to a second aspect of the present invention is the push latch device according to the first aspect, wherein the axial direction of the biasing spring is parallel to the sliding direction of the slider, and the axial position of the biasing spring is the push-in position. It is provided on the same straight line as the axial position of the rod.
According to this aspect, the urging force that urges the slider in the protruding direction is transmitted to the slider most efficiently. Therefore, the urging spring can be reduced in size, the slider can be prevented from tilting, and the slider can be moved smoothly.

  The push latch device according to the third aspect of the present invention is the push latch device according to the first or second aspect, wherein the base end side of the oscillating arm is a spring degree contact member abutting against one end of the biasing spring. The engaging claw is provided at a position deviated from the swing fulcrum corresponding to the axial position of the biasing spring, and an engagement shaft that engages with the cam groove is provided on the free end side of the swing arm. It is provided at a position deviated from the swing fulcrum corresponding to the axial line position of the bias spring.

  According to this aspect, the holding posture of the slider is stabilized at the protruding position and the retracted position of the push rod, and the holding force is increased. Therefore, the pushing rod is reliably switched between the protruding position and the retracted position by, for example, two successive pushing operations of the pushing rod.

  A push latch device according to a fourth aspect of the present invention includes a push rod that abuts against the opposing surface of the movable body to push the movable body, a slider integrated with the push rod, and a tendency to project the slider. A force spring, a multi-position holding loop-shaped cam groove that switches and holds the protruding position of the push rod in a plurality of stages by repeated pushing operations of the push rod, and a part on the free end side engage with the cam groove And a swing arm that swings about a swing fulcrum provided on the base end side, and on the side of the cam groove, a part of the free end side of the swing arm extends from the cam groove. Returning means is provided which, when detached, comes into contact with a part of the swing arm and returns a part of the free end side of the swing arm back into the cam groove.

  This aspect will be described as follows in a more specific example for easy understanding. That is, a pushing rod that abuts against the opposing surface of the movable body and pushes out the movable body, a slider integral with the push rod, a biasing spring that imparts a tendency to protrude to the slider, and two successive push rods. A cam groove having a two-position holding loop shape that switches between a protruding position and a retracted position of the push rod and holding them by a pushing operation of the push rod, and a portion of the free end side that engages with the cam groove, and a swing provided on the base end side. A swing arm swinging around a moving fulcrum, and a part of the free end side of the swing arm on the side of the cam groove becomes a part of the swing arm when the cam groove is removed from the cam groove. Returning means is provided for returning a part of the free end side of the swing arm back into the cam groove.

  According to this aspect, when a part of the free end side of the swing arm is disengaged from the cam groove, even if the push latch device is not disassembled and repaired, the swing arm is automatically swung by simply pressing the push rod. A part of the free end of the moving arm can be returned to the cam groove again. Therefore, the stability of the operation of the push latch device is maintained, and the repair cost can be greatly reduced.

The push latch device according to a fifth aspect of the present invention is the push latch device according to the fourth aspect, wherein the return means is formed with respect to a slider holder that guides the movement of the slider in the protruding direction and the retracting direction. It is a protrusion.
According to this aspect, the return means can be configured with a very simple configuration, and the number of parts does not increase, which contributes to downsizing of the push latch device.

The push latch device according to a sixth aspect of the present invention is characterized in that, in the fourth or fifth aspect, the return means is a guide restricting portion that guides the movement of the swing arm together with the cam groove. It is what.
According to this aspect, the circulation movement on the free end side of the swing arm is further smoothed, and the possibility that a part of the free end side of the swing arm is detached from the cam groove is reduced.

In the push latch device according to a seventh aspect of the present invention, in any one of the first to sixth aspects, the cam groove is formed by a continuous groove having a heart shape in plan view. Is.
According to this aspect, a cam groove having a two-position holding loop shape that can switch and hold the protruding position and the retracted position of the push rod by two successive pushing operations of the push rod with a relatively simple configuration is configured. can do.

  The push latch device according to an eighth aspect of the present invention is the push latch device according to any one of the first to sixth aspects, wherein the cam groove guides a part of a loop-like movement locus at a free end of the swing arm. The other part of the loop-like movement locus at the free end of the swing arm not guided by the cam groove is guided by another guide member provided separately. It is comprised by these.

  According to this aspect, it is possible to add a function capable of executing the same guiding action as that of the cam groove to a narrow space where a continuous cam groove cannot be formed. Therefore, further downsizing of the push latch device can be realized.

The push latch device according to a ninth aspect of the present invention is characterized in that, in the eighth aspect, the guide member is constituted by a return means in the push latch device of the sixth aspect. .
According to this aspect, a compact and functional guide member and cam groove can be provided without increasing the number of parts. Therefore, the push latch device can be further reduced in size.

  A recording apparatus according to a tenth aspect of the present invention is connected to the recording apparatus main body and a rotating fulcrum provided at a lower portion of the recording apparatus main body on the front surface of the recording apparatus main body so as to be rotatable. A discharge stacker; and a push latch device provided between the recording apparatus main body and the discharge stacker, wherein the push latch device is the push latch device according to any one of the first to ninth aspects. It is characterized by.

According to this aspect, it is possible to reduce the number of parts by applying a biasing force in two directions to a single biasing spring, and to realize downsizing of the opening / closing device of the push latch device or the discharge stacker, The present invention can also be applied to a compact recording apparatus.
In addition, simply repeating the push-in operation of the push rod, the engagement shaft released from the cam groove can be automatically returned to the cam groove, and the push latch can be operated and the repair cost can be reduced. It is possible to provide a recording apparatus including an opening / closing device for the apparatus or the discharge stacker.
Further, it is possible to provide a recording apparatus including a push latch device or a discharge stacker opening / closing device capable of performing an efficient and efficient guide operation of the engagement shaft.

  A liquid ejecting apparatus according to an eleventh aspect of the present invention is rotatable with respect to the liquid ejecting apparatus main body and a liquid ejecting apparatus main body around a rotation fulcrum provided at a lower portion on the front surface of the liquid ejecting apparatus main body. A discharge stacker to be connected; and a push latch device provided between the liquid ejecting apparatus main body and the discharge stacker. The push latch device abuts against a facing surface of the discharge stacker and holds the discharge stacker. A push rod to be pushed out, a slider integrated with the push rod, a biasing spring that imparts a tendency to project the slider, and a push position of the push rod are repeatedly pushed and held in a plurality of stages. A cam groove having a multi-position holding loop shape, and a swing arm that swings around a swing fulcrum provided on the base end side with a part of the free end side engaged with the cam groove The provided, the axis position of the biasing spring, is characterized in that the position shifted left or right direction from the swing fulcrum of the swing arm.

  Hereinafter, the first embodiment in which the push latch device according to the present invention is applied to the opening / closing device of the discharge stacker of the recording device, the second embodiment in which the configuration of the push latch device according to the present invention is different, and the discharge stacker of the present invention are described. A recording apparatus which is an example of a liquid ejecting apparatus including an opening / closing device will be described. First, an ink jet printer 100 is taken up as the best mode for carrying out a liquid ejecting apparatus of the present invention and a recording apparatus as an example of the liquid ejecting apparatus, and the outline of the entire configuration will be described with reference to the drawings. The ink jet printer 100 described here is extremely compact and easy to carry for a recording material P (hereinafter also simply referred to as a paper P) which is an example of a liquid jetting material of 4 × 6 inches or less, for example. This is an inkjet printer with a simple design with almost no irregularities on the surface. The ink jet printer 100 is a so-called direct printer type ink jet printer that can directly print image data taken by a digital camera or the like as a photograph on paper P without being connected to a personal computer. is there.

  FIG. 1 is a perspective view showing the ink jet printer in a state where the cover member and the discharge stacker are closed, and FIG. 2 is a perspective view showing the ink jet printer in a state where the cover member and the discharge stacker are expanded. As shown in FIGS. 1 and 2, the ink jet printer 100 includes a square box-shaped liquid ejecting apparatus main body and a printer main body (corresponding to a main body in a door opening / closing device) 3 as an example of a recording apparatus main body. Yes. The printer main body 3 includes a housing 4 having a deep bottom container shape in which the front, rear, left and right side surfaces and bottom are closed and the upper surface is open, and the upper surface of the printer main body 3 as shown in FIG. In the state of use shown in FIG. 2, the cover member 6 functions also as a tray support for supporting the upper portion of the paper P protruding above the feeding tray 5, and the cover in the unused state shown in FIG. An operation panel 7 that is located below the member 6 and closes the opened upper surface of the housing 4, a recessed portion 16 in which a part of the front surface of the housing 4 is recessed, and an openable and closable accommodation accommodated in the recessed portion 16. A discharge stacker (corresponding to a door body in a door body opening and closing device) 8 provided on the door 4 and a portal hand which is pivotally connected to the left and right side plates of the housing 4 And a 9.

  On the operation panel 7, a liquid crystal monitor 11 is attached at the center, and various operation buttons 12a, 12b, 12c,... 12n are attached to the periphery of the operation panel 7. A feeding opening 13 is provided. As the liquid crystal monitor 11 and the operation buttons 12a, 12b, 12c,... 12n, various shapes or structures including a touch panel switch can be adopted. The feeding opening 13 serves as a paper P taking-in port, and an automatic feeding unit capable of automatically feeding a plurality of sheets of paper P continuously into the feeding opening 13. 2 is facing the feeding tray 5.

  Further, the discharge stacker 8 is provided with rotating shafts 17 and 17 serving as rotating fulcrums at the lower portions of the left and right side surfaces, and when the recording is executed, the rotating shafts 17 and 17 are centered as shown in FIG. It turns to the front until it becomes almost horizontal. In this state, the back surface 18 of the discharge stacker 8 that comes to the upper surface is a placement surface that receives the paper P that is discharged after recording. Further, when the discharge stacker 8 is expanded, a recessed portion 16 on the front surface of the housing 4 appears as shown in FIG. A paper slot 19 is provided at the bottom of the recess 16 and a card slot 15 for inserting a memory card or the like on which image data taken by a digital camera or the like is recorded is provided above the recess 16. ing.

[Example 1]
Next, the door body opening / closing device 1 mainly composed of the push latch device 21 of the present invention, which can be applied to the discharging stacker opening / closing device 1 of the inkjet printer 100 configured as described above (the same as the discharging stacker). The configuration and operation mode of (using reference numeral 1) will be specifically described based on the drawings.

  FIG. 3 is a perspective view showing a concave portion of the printer main body in a state where the discharge stacker and the cover member are expanded, and FIG. 4 is an upper right corner portion of the concave portion in the printer main body in a state where the discharge stacker is expanded. It is a perspective view from the slanting lower part which expands and shows the vicinity. 5 is an exploded perspective view showing the push latch device in an exploded view, and FIG. 6 is an exploded perspective view showing the push latch device in an exploded view. FIG. 7 is a plan sectional view showing the operation mode of the push latch device when the discharge stacker is in the expanded state, and FIG. 8 shows the operation mode of the push latch device when the discharge stacker is closed from the state of FIG. FIG. FIG. 9 is a plan sectional view showing an operation mode of the push latch device at the moment when the surface of the discharge stacker is pushed with a finger in the state of FIG. 8, and FIG. 10 is a state in which the finger is released from the surface of the discharge stacker from the state of FIG. FIG. 6 is a plan sectional view showing an operation mode of the push latch device when the discharge stacker is expanded.

  The discharge stacker opening / closing device 1 includes a push latch device 21 of the present invention provided on the printer main body 3 side, and a magnet catch device 22 provided between the printer main body 3 and the discharge stacker 8. In this embodiment, the push latch device 21 includes a push rod 23 that contacts the back surface 18 of the discharge stacker 8 that is a movable body and pushes the discharge stacker 8 forward, and a slider 24 that is integral with the push rod 23. A bias spring 26 that imparts a tendency to protrude to the slider 24 and a two-position holding loop-shaped cam that switches and holds the protruding position and retracted position of the push rod 23 by two successive pushing operations of the push rod 23 A groove 27 and a swing arm 29 that engages with an engagement shaft 28 provided on the free end side in the cam groove 27 and swings about a swing hole 43 serving as a swing support point provided on the base end side. It has.

  As a characteristic configuration of the present invention, the position of the axis L of the urging spring 26 is set to a position shifted in the left or right direction from the center of the swing hole 43 of the swing arm 29. In the illustrated embodiment, the position of the axis L of the urging spring 26 is set at a position shifted from the center of the swing hole 43 by a deviation amount S on the left side. In this way, by setting the position of the axis L of the biasing spring 26 at a position shifted from the center of the swinging hole 43, the swinging arm 29 is moved in addition to the biasing force that biases the slider 24 in the protruding direction C. The urging force to swing leftward toward the left side is provided by the single urging spring 26.

  Further, as shown in FIGS. 7 to 10, the direction of the axis L of the biasing spring 26 is parallel to the sliding direction of the slider 24, and the position of the axis L of the biasing spring 26 is the position of the push rod 23. It is provided on the same straight line as the axis position. By setting the direction and position of the axis L of the urging spring 26 in such a direction and position, the urging force of the urging spring 26 that urges the slider 24 in the protruding direction C is transmitted to the slider 24 most efficiently. It has become so.

  As an example, the push rod 23 is a rectangular bar-like member and is integrally formed with a rectangular flat plate-like slider 24. The push rod 23 is provided so as to protrude forward from a square hole-shaped hole 31 provided on the front surface 20 of the recessed portion 16. On the lower surface of the slider 24, a cam groove 27 having a two-position holding loop shape having a heart shape in a plan view is provided in a portion near the front push rod 23, and a rear portion of the cam groove 27 is provided. Are provided with two rectangular grooves 32 and 33 extending linearly in parallel with the sliding direction of the slider 24.

  The urging spring 26 is constituted by a compression coil spring having a small coil diameter and wire diameter, and is accommodated in a square groove 32 closer to the center near the swing shaft 50 of the two square grooves 32, 33. It has become.

  As described above, the cam groove 27 is formed by a continuous groove having a heart shape in plan view, and the top of the cam groove 27 intersecting on the back side holds the retraction position of the push rod 23, the cam groove 27 is a holding point B that holds the projecting position of the push rod 23. Further, as shown in FIG. 7 to FIG. 10, the pushing path 40 through which the right path toward the cam groove 27 across the holding points A and B pushes the pushing rod 23 backward, the holding points A and B. A path on the left side of the cam groove 27 with respect to the cam groove 27 is an extrusion path 41 through which the push rod 23 is pushed forward.

  Further, the bottom surface of the extrusion path 41 is formed so as to gradually increase toward the holding point A so that the engaging shaft 28 does not enter the holding path A toward the extrusion path 41 in the reverse direction. A step 42 is provided. Therefore, the engagement shaft 28 of the swing arm 29 moves in the cam groove 27 in the order of the pushing path 40, the holding point B, and the pushing path 41 starting from the holding point A, and returns to the holding point A again. It is configured to be able to circulate in only the direction.

  The oscillating arm 29 is a flat plate-like member that is formed so that the base side is somewhat wide and the end is rounded. The engaging shaft 28 that protrudes upward is provided on the upper surface on the distal end side of the swinging arm 29, and the base end side of the swinging arm 29 is outside the engaging shaft 28 ( A swing hole 43 is provided at a position eccentric to the right side in FIGS. Further, two engaging claws 44 and 45 are arranged side by side at a certain distance on the inner side of the swing hole 43, and these engaging claws 44 and 45 are arranged on the lower surface of the slider 24. The two square grooves 32 and 33 formed are engaged with each other.

  The biasing spring 26 is accommodated in the square groove 32 closer to the center near the swinging hole 43 out of the two square grooves 32 and 33. Accordingly, of the two engaging claws 44, 45, the engaging claw 44 close to the swing hole 43 abuts against one end surface of the urging spring 26 and presses the urging spring 26. This is an engaging claw 44 for use. Accordingly, the spring claw engagement claw 44 is positioned on the extension line of the axis L of the biasing spring 26 and is shifted from the center of the swing hole 43 by a deviation amount S. Further, the engaging shaft 28 provided on the free end side of the swing arm 29 is also located on an extension line of the axis L of the biasing spring 26, and the swinging arm 29 swings similarly to the engaging claw 44 for spring degree application. They are located on the same straight line that is displaced from the center of the moving hole 43 by a deviation amount S.

  The slider holder 30 is a flat rectangular flat plate member, and a recess 30a for receiving the slider 24 is formed at the center of the upper surface. Further, the left and right convex portions of the concave portion 30 a are side guides 47 and 48 that are in sliding contact with the left and right side surfaces of the slider 24. In addition, three locking claws 46 for locking the slider 24 using a part of the side guides 47 and 48 are provided as an example. A swing shaft 50 that fits with the swing hole 43 of the swing arm 29 is raised upward at a position slightly to the right from the middle of the recess 30a of the slider holder 30 toward the rear. ing. Therefore, the push latch device 21 includes only four members, ie, the slider 24, the biasing spring 26, the swing arm 29, and the slider holder 30, and the push latch device 21 has a thin structure that can be attached even in a narrow space. It has become.

  On the other hand, as shown in FIG. 4, the magnet catch device 22 basically includes a magnet 54, a magnet holder 53 that holds the magnet 54, and a magnetic piece (not shown) that is attracted and held by the magnet 54. It is configured. In this embodiment, a square window-like window portion 55 is formed on the upper surface 59 of the printer main body 3 projecting forward from the recessed portion 16, and the bottom portion of the magnet holder 53 protrudes downward from the window portion 55. It is provided to do. On the other hand, the magnetic piece is provided as an example near the free end of the position corresponding to the magnet 54 of the discharge stacker 8.

  In the closed state of the discharge stacker 8, the discharge stacker 8 is stored in the recessed portion 16 by the magnet catch device 22. In the stored state, the surface of the printer main body 3 and the surface of the discharge stacker 8 are stored. Are configured to be flush with each other as shown in FIG.

  Next, the operation mode of the discharge stacker opening / closing device 1 configured as described above will be described separately for (1) closing the discharge stacker and (2) opening the discharge stacker.

(1) When closing the stacker for discharging (see FIGS. 7 and 8)
As shown in FIG. 7, in a state where the discharge stacker 8 is open, the slider 24 is positioned closest to the front by the biasing force of the biasing spring 26. The pushing rod 23 integrated with the slider 24 is in a state of largely protruding forward from a hole portion 31 formed in the front surface 20 of the recessed portion 16 of the printer body 3. Then, when the discharge stacker 8 that is tilted forward is raised upward and the discharge stacker 8 is pushed into the recessed portion 16 of the printer body 3, the back surface 18 of the discharge stacker 8 comes into contact with the end surface of the push rod 23. The push rod 23 is pushed backward as shown in FIG.

  When the pushing rod 23 is pushed backward in this way, the slider 24 integrated with the pushing rod 23 moves backward as shown in the figure against the urging force of the urging spring 26. Further, the rotation free end of the discharge stacker 8 moves to a position facing the bottom of the magnet holder 53, and the magnetic force (not shown) disposed near the free end of the discharge stacker 8 by the magnetic force of the magnet 54. The pieces are sucked and held, and the discharge stacker 8 is closed.

  As the slider 24 moves rearward, the swing arm 29 moves leftward from the biasing spring 26 toward the swing arm 29 based on the shift amount S with the swing shaft 50 as the swing center. The engagement shaft 28 reaches the holding point B through the pushing path 40 from the holding point A as shown by an arrow in FIG. That is, the swing arm 29 first swings to the right along the heart-shaped cam groove 27 in the figure and then swings to the left, and the push rod 23 is held at the pushed position shown in FIG. The In this state, the push rod 23 and the magnet holder 53 are all hidden by the discharge stacker 8, and the push rod 23 and the magnet holder 53 cannot be visually recognized from the outside.

(2) When the discharge stacker is opened (see FIGS. 9 and 10)
A case will be described in which the discharge stacker 8 accommodated in the recessed portion 16 is tilted forward and opened to enable recording. In this case, as shown in FIG. 9, the surface of the discharge stacker 8 is lightly pressed with a finger, and the push rod 23 and the slider 24 are moved slightly backward. As the slider 24 moves rearward, the swing arm 29 receives the urging force in the left direction and swings in the clockwise direction in FIG. Move left diagonally forward.

  Subsequently, when the finger that has pressed the surface of the discharge stacker 8 is released, the slider 24 moves forward by the biasing force in the protruding direction C of the biasing spring 26. Then, as shown in FIG. 10, the engagement shaft 28 leaves the holding point B and reaches the holding point A through the extrusion path 41 as indicated by an arrow in the figure. In this way, the discharge stacker 8 is rotated toward the front and is expanded, so that the recessed portion 16 of the printer main body 3 appears.

  The engaging shaft 28 that has once reached the holding point A cannot directly enter the pushing path 41 as described above by the step 42 provided at the intersection of the pushing path 40 and the pushing path 41. Yes. Thus, the engagement shaft 28 can always rotate in the cam groove 27 only in the clockwise direction in FIGS. In addition, when the discharge stacker 8 is expanded, the push rod 23 appears on the front surface 20 of the recessed portion 16 of the printer body 3, but the appearance of the printer body 3 is hardly affected.

[Example 2]
Next, the configuration of the push latch device 61 according to the second embodiment, in which the configuration of the push latch device 21 according to the first embodiment is partially different, will be specifically described with reference to the drawings. In the following description, the description of the configuration common to the push latch device 21 according to the first embodiment is omitted, and the reference numerals used in the drawing are the same as those used in the first embodiment.

  FIG. 11 is a plan view showing a push latch device provided with a return means according to the second embodiment, FIG. 12 is the same as above, FIG. 12 is a plan view showing another push latch device with a different configuration of the return means, and FIG. It is a top view which shows the further another push latch apparatus which varied the structure of the means.

  The push latch device 61 is in contact with the back surface 18 of the discharge stacker 8 which is a movable body, pushes the discharge stacker 8 forward, the slider 24 integrated with the push rod 23, and protrudes into the slider 24. An urging spring 26 for imparting a tendency; a cam groove 27 having a two-position holding loop shape that switches and holds the protruding position and the retracted position of the pushing rod 23 by two successive pushing operations of the pushing rod 23; A swing arm 29 is provided that engages a part of the free end side with the cam groove 27 and swings about a swing support point provided on the base end side.

  As a characteristic configuration of the second embodiment, when the engaging shaft 28 provided on the free end side of the swing arm 29 is located on the side of the cam groove 27 and is disengaged from the cam groove 27, Returning means 62 is provided which comes into contact with the portion and returns the engaging shaft 28 into the cam groove 27 again.

  In the push latch device 61 shown in FIG. 11, the return means 62 is inward from a part of the peripheral edge of the opening 63 that is formed in a square window shape through the center of the bottom surface of the recess 30a of the slider holder 30. It is comprised by the protrusion 64 for a protrusion which protrudes toward. In this embodiment, the return protrusion 64 has a triangular shape in plan view, and the return protrusion 64 is provided with a round bar-shaped contact shaft portion 65 protruding toward the slider 24 to perform the return operation. Can be smooth.

  The shape of the return protrusion 64 can be variously changed. For example, as shown in FIG. 12, a rectangular shape in plan view and a flat contact plate portion 66 projecting toward the slider 24 at the tip thereof may be used.

  Further, as shown in FIG. 13, the shape of the opening 63 itself can be formed so as to act so that the engagement shaft 28 that is disengaged from the cam groove 27 is returned to the cam groove 27 again.

  The return means 62 does not act on the swing arm 29 only when the engagement shaft 28 is disengaged from the cam groove 27 but also when the engagement shaft 28 moves in the cam groove 27. Can be made. In this way, when the return means 62 acts on the swing arm 29 while the engagement shaft 28 is moving in the cam groove 27, the return means 62 is disengaged from the cam groove 27. In addition to the original function of returning 28 to the cam groove 27, the cam groove 27 and a function as a guide restricting portion for guiding the movement of the swing arm 29 are provided.

[Other embodiments]
The push latch devices 21 and 61 according to the present invention and the recording device 100 or the like in which the push latch devices 21 and 61 are applied to the opening / closing device 1 of the discharge stacker are basically configured as described above. Of course, it is possible to change or omit the partial configuration without departing from the gist of the present invention. For example, the push latch devices 21 and 61 of the present invention are not limited to the opening / closing device 1 of the discharge stacker in the recording device such as the ink jet printer 100 or the other liquid ejecting device, and rotate relative to the main body 3. The present invention can be applied to various devices including a movable body 8 such as a door body that is freely connected, and an opening / closing device in a storage or a container.

  In the push latch devices 21 and 61 of the above-described embodiment, the cam groove 27 having a two-position holding loop shape that switches and holds the protruding position and the retracted position of the push rod by two successive pushing operations of the push rod has been described. However, the present invention can be similarly applied to a push latch device provided with a cam groove having a multi-position holding loop shape that switches and holds the protruding position of the push rod in a plurality of stages by repeatedly pushing the push rod.

  Further, when it is desired to increase the urging force in two directions of the slider 24, the urging spring 26 can be contracted in both of the two square grooves 32 and 33. Incidentally, when configured in this way, the biasing force in two directions can be increased without increasing the coil diameter or wire diameter of the biasing spring 26, and the push rod device 21 remains in its thin shape and the push rod. 23 can be increased, and the swing of the swing arm 29 can be stabilized.

Further, the cam groove 27 may be constituted by a continuous groove as shown in the first embodiment, the second embodiment and FIG. 14, or may be constituted by a discontinuous groove as shown in FIG.
That is, even in the continuous cam groove 27 having a heart shape as shown in FIG. 14, the sliding surface of the cam groove 27 that is in sliding contact with the engagement shaft 28 is limited to three places indicated by reference numerals 67, 68, and 69. ing. Therefore, the remaining portion of the cam groove 27 where the engaging shaft 28 does not slide is omissible, and the cam groove 27 having a discontinuous shape as shown in FIG. Is also possible. In FIG. 15, a part of the necessary sliding contact surfaces 67, 68, 69 is guided by another guide member 70 provided separately, and the other guide member 70 is configured by the return means 62. Is also possible.

FIG. 3 is a perspective view showing an ink jet printer when a discharge stacker is closed. FIG. 3 is a perspective view showing the ink jet printer when the discharge stacker is expanded. FIG. 3 is a perspective view illustrating a recessed portion of the printer main body from obliquely above. FIG. 3 is a perspective view from an oblique lower side showing a part of a recessed portion of the printer main body in an enlarged manner. The perspective view from diagonally upward which shows a push latch apparatus disassembled. The perspective view from the slanting lower part which decomposes | disassembles and shows a push latch apparatus. The cross-sectional view showing the push latch device when the discharge stacker is expanded. The cross-sectional view which shows the push latch apparatus at the time of obstruction | occlusion of the stacker for discharge | emission. FIG. 5 is a plan sectional view showing the push latch device at the moment when the surface of the discharging stacker in the closed state is pushed. The cross-sectional view which shows the push latch apparatus after releasing a finger | toe from the surface of the stacker for discharge | emission. The top view which shows the push latch apparatus provided with the return means. The top view which shows the other push latch apparatus provided with the return means. The top view which shows the further another push latch apparatus provided with the return means. The top view which shows the cam groove of the continuous loop shape which carried out the heart shape. The top view which shows the guide structure of the engagement shaft which combined the discontinuous cam groove and the guide member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Opening and closing device of discharge stacker (door body opening and closing device) 2 Automatic feeding unit 3 Printer body (main body) 4 Housing 5 Feeding tray 6 Cover member 7 Operation panel 8 Ejection stacker ( Door body), 9 Hand handle, 11 LCD monitor, 12a, 12b, 12c,... 12n Operation button, 13 Feeding opening, 15 Card slot, 16 Recessed portion, 17 Rotating shaft, 18 Back surface, 19 Discharge port , 20 Front surface, 21 Push latch device, 22 Magnet catch device, 23 Push rod, 24 Slider, 26 Biasing spring, 27 Cam groove, 28 Engagement shaft, 29 Swing arm, 30 Slider holder, 30a Recess, 31 Hole , 32 (center-side) square groove, 33 square groove, 40 push-in path, 41 push-out path, 42 step, 43 swing hole, 44 Engagement claw (for spring degree application), 45 engagement claw, 46 locking claw, 47 side guide, 48 side guide, 50 swing shaft (swing fulcrum), 53 magnet holder, 54 magnet, 55 window, 61 Push latch device, 62 Return means, 63 Opening, 64 Return projection, 65 Contact shaft, 66 Contact plate, 67 Slide contact surface, 68 Slide contact surface, 69 Slide contact surface, 70 Other guide members, 100 Inkjet printer (recording device), P paper (recording material), A holding point, B holding point, C protruding direction, D retracting direction, E left and right direction, L axis, S deviation amount

Claims (11)

A pushing rod that abuts against the opposing surface of the movable body and pushes out the movable body;
A slider integral with the push rod;
An urging spring for imparting a protruding tendency to the slider;
A cam groove having a multi-position holding loop shape that switches and holds the protruding position of the push rod in a plurality of stages by repeated pushing operations of the push rod;
A swing arm that engages with a part of the free end side in the cam groove and swings around a swing fulcrum provided on the base end side;
The push latch device according to claim 1, wherein a swing fulcrum of the swing arm is located at a position deviating from a plane including an axis of the biasing spring.   2. The push latch device according to claim 1, wherein the axial direction of the biasing spring is parallel to the sliding direction of the slider, and the axial position of the biasing spring is on the same straight line as the axial position of the push rod. A push latch device characterized by being.   3. The push latch device according to claim 1, wherein an engagement claw for a spring degree abutting against one end of the biasing spring is provided at an axial position of the biasing spring on a proximal end side of the swing arm. The swing shaft is provided at a position displaced from the corresponding swing fulcrum, and an engagement shaft that engages with the cam groove is provided on the free end side of the swing arm so that the swing shaft corresponds to the axial position of the biasing spring. A push latch device provided at a position shifted from a fulcrum. A pushing rod that abuts against the opposing surface of the movable body and pushes out the movable body;
A slider integral with the push rod;
An urging spring for imparting a protruding tendency to the slider;
A cam groove having a multi-position holding loop shape that switches and holds the protruding position of the push rod in a plurality of stages by repeated pushing operations of the push rod;
A swing arm that engages with a part of the free end side in the cam groove and swings around a swing fulcrum provided on the base end side;
On the side of the cam groove, a part of the free end side of the swing arm comes into contact with a part of the swing arm when the swing arm is detached from the cam groove, and again on the free end side of the swing arm. A push latch device characterized in that a return means is provided for returning a part into the cam groove.   5. The push latch device according to claim 4, wherein the return means is a return protrusion formed on a slider holder for guiding the movement of the slider in the protruding direction and the retracting direction. apparatus.   6. The push latch device according to claim 4, wherein the return means is a guide restricting portion that guides movement of the swing arm together with the cam groove.   The push latch device according to any one of claims 1 to 6, wherein the cam groove is a continuous groove having a heart shape in a plan view.   The push latch device according to any one of claims 1 to 6, wherein the cam groove is constituted by a discontinuous groove that guides a part of a loop-like movement locus at a free end of the swing arm. The other part of the loop-like movement locus at the free end of the swing arm not guided by the cam groove is configured to be guided by another guide member provided separately. Push latch device.   9. The push latch device according to claim 8, wherein the guide member is constituted by the return means according to claim 6. A recording device main body;
A discharge stacker that is pivotally connected to the recording apparatus main body around a rotation fulcrum provided at a lower portion on the front surface of the recording apparatus main body;
A push latch device provided between the recording apparatus main body and the discharge stacker;
The recording apparatus according to claim 1, wherein the push latch device is the push latch device according to claim 1. A liquid ejecting apparatus body;
A discharge stacker that is pivotally connected to the liquid ejecting apparatus main body around a rotation fulcrum provided at a lower portion on the front surface of the liquid ejecting apparatus main body;
A push latch device provided between the liquid ejecting apparatus main body and the discharge stacker;
The push latch device is:
A push rod that abuts against the opposing surface of the discharge stacker and pushes out the discharge stacker;
A slider integral with the push rod;
An urging spring for imparting a protruding tendency to the slider;
A cam groove having a multi-position holding loop shape that switches and holds the protruding position of the push rod in a plurality of stages by repeated pushing operations of the push rod;
A swing arm that engages with a part of the free end side in the cam groove and swings around a swing fulcrum provided on the base end side;
The liquid ejecting apparatus according to claim 1, wherein a swing fulcrum of the swing arm is located at a position deviating from a plane including an axis of the biasing spring.

Images