JP6277763B2 - Image reading device - Google Patents

Description

  The present invention relates to an image reading apparatus.

  An image reading apparatus in which a contact image sensor unit (CIS unit) is accommodated in a carriage housing is conventionally known (for example, see Patent Document 1). An image reading apparatus that includes a spacer that contacts a document table (glass plate) and maintains a constant distance between the document table and the CIS unit is also known (see, for example, Patent Document 2).

JP 2007-133309 A JP 2010-22021 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide an image reading apparatus that can realize positioning of a reading apparatus main body with respect to a document table and prevention of dropping from a storage member with a simple configuration.

In order to achieve the above object, an image reading apparatus according to a first aspect of the present invention includes a reading apparatus main body that reads a document placed on a document table, and accommodates the reading apparatus main body, and reads the original. Sometimes, an accommodating member that moves from one end portion to the other end portion of the document, and a biasing member that is provided between the lower surface of the reading device main body and the bottom surface of the receiving member, and biases the reading device main body. , attached to the reader body, a convex portion for positioning in the height direction of the reading apparatus unit by contacting the platen is biased through said reading apparatus unit from said biasing member, said housing A positioning member having an engaging portion engaged with the engaged portion formed in the member in the height direction.

According to another aspect of the present invention, there is provided an image reading apparatus including a reading apparatus main body for reading a document placed on a document table, and the reading apparatus main body. A housing member that moves to the scanning unit, a convex portion that is attached to the reading device body and contacts the document table in the height direction of the reading device body, and an engaged portion formed on the housing member A positioning member having an engaging portion that engages in the height direction, and the reading device main body has a protrusion at a position adjacent to the engaging portion, When the reading device main body is accommodated, a guide portion is provided for guiding the engaging portion and the protruding portion.

  The image reading device according to claim 3 is the image reading device according to claim 1 or 2, wherein a lower end portion of the engaging portion projects downward from the reading device main body. Has been.

According to a fourth aspect of the present invention, there is provided an image reading apparatus including a reading apparatus main body for reading a document placed on a document table, and the reading apparatus main body. A housing member that moves to the scanning unit, an urging member that is provided between both lower end portions of the reading device body and both bottom surface portions of the housing member, and is attached to the reading device body and contacts the document table. And a positioning member having a convex portion for positioning in the height direction of the reading device main body, and an engaging portion that engages with an engaged portion formed in the housing member in the height direction. When viewed from the longitudinal direction of the reading apparatus main body, the engaging portion is disposed at a position overlapping the urging member.

According to another aspect of the present invention, there is provided an image reading apparatus including a reading apparatus main body for reading an original placed on an original platen, and the reading apparatus main body. A housing member that moves to the scanning unit, an urging member that is provided between both lower end portions of the reading device body and both bottom surface portions of the housing member, and is attached to the reading device body and contacts the document table. And a positioning member having a convex portion for positioning in the height direction of the reading device main body, and an engaging portion that engages with an engaged portion formed in the housing member in the height direction. As seen from the moving direction of the housing member, the convex portion is disposed immediately above the urging member.

According to another aspect of the present invention, there is provided an image reading apparatus including a reading apparatus main body for reading a document placed on a document table, and the reading apparatus main body. A housing member that moves to the scanning unit, a convex portion that is attached to the reading device body and contacts the document table in the height direction of the reading device body, and an engaged portion formed on the housing member A positioning member having an engaging portion that engages in the height direction, and the accommodating member has an insertion portion that is opened upward, and the reading device main body is attached to the accommodating member. It has an insertion part inserted in the to-be-inserted part when accommodated.

The image reading apparatus according to claim 7 , wherein a reading device main body that reads a document placed on a document table and the reading device main body are housed, and when reading the original, the other end to the other end of the document A housing member that moves to the scanning unit, a convex portion that is attached to the reading device body and contacts the document table in the height direction of the reading device body, and an engaged portion formed on the housing member A positioning member having an engaging portion that engages in the height direction, and the positioning member has a pair of leg portions, and a locking portion formed on the leg portions includes the engaging portion. It is attached to the reading device main body by being locked by a locked portion formed at a position away from the joint portion toward the center in the longitudinal direction of the reading device main body.

The image reading apparatus according to claim 8 , wherein the reading apparatus main body for reading a document placed on a document table and the reading apparatus main body are accommodated, and when reading the original, the other end to the other end of the original A housing member that moves to the scanning unit, a convex portion that is attached to the reading device body and contacts the document table in the height direction of the reading device body, and an engaged portion formed on the housing member A positioning member having an engaging portion that engages in the height direction, and a claw portion is formed on the engaging portion, and an upper surface of the claw portion is inclined obliquely upward and outward. The lower surface of the engaged portion facing the upper surface of the claw portion is also an inclined surface inclined obliquely upward and outward.

  According to the first aspect of the present invention, the positioning member that positions the reading device main body in the height direction by the convex portion coming into contact with the document table is provided on the engaged portion formed on the housing member. Compared to a configuration that does not have an engaging portion that engages in the height direction, positioning of the reading device main body with respect to the document table and prevention of dropping from the housing member can be realized with a simple configuration.

  According to the second aspect of the present invention, when the reading device main body is accommodated in the accommodating member, the accommodating member does not have a guide portion that guides the engaging portion and the protruding portion. Guidance when the reading device main body is accommodated in the accommodation member can be improved.

  According to the third aspect of the present invention, the guide when the reading device main body is accommodated in the accommodating member as compared with the configuration in which the lower end portion of the engaging portion does not protrude downward from the reading device main body. Can be improved.

  According to the fourth aspect of the present invention, the reading device main body including the biasing member as compared with the configuration in which the engaging portion is not disposed at a position overlapping the biasing member when viewed from the longitudinal direction of the reading device main body. Can be improved when the container is accommodated in the accommodating member.

  According to the fifth aspect of the present invention, as compared with the configuration in which the convex portion is not disposed immediately above the urging member when viewed from the moving direction of the housing member, the positioning of the reading device main body with respect to the document table is accurate. it can.

  According to the sixth aspect of the present invention, when the reading device main body is accommodated in the accommodating member, the reading device main body does not have an insertion portion that is inserted into the inserted portion formed in the accommodating member. As compared with the above, positioning of the reading device main body with respect to the housing member can be performed with high accuracy.

  According to the seventh aspect of the present invention, the positioning member is disengaged from the main body of the reading device as compared with the configuration in which the locking portion formed on the leg portion of the positioning member is formed at a position close to the engaging portion. Can be difficult.

  According to the eighth aspect of the present invention, the upper surface of the claw portion formed in the engaging portion is not an inclined surface inclined obliquely upward and outward, but the engaged portion facing the upper surface of the claw portion. Compared with a configuration in which the lower surface is not inclined to be inclined obliquely upward and outward, the positioning member can be less likely to be detached from the reading apparatus main body.

It is a perspective view which shows an image reading apparatus. 2 is a perspective view showing the inside of the image reading apparatus. FIG. FIG. 3 is an enlarged side view of the image reading apparatus with a part thereof omitted. It is a perspective view which shows the reader main body accommodated in the accommodating member. FIG. 6 is an enlarged side view illustrating a main body of a reading device housed in a housing member with a part thereof omitted. It is a perspective view which expands and partially shows the process of assembling the reading device main body to the housing member. It is a front view which shows the reader main body accommodated in the accommodating member. It is a perspective view of a spacer. It is a perspective view which expands and shows a part of accommodating member.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In each figure, an arrow UP is an upward direction of the image reading apparatus 10, and an arrow FR is a forward direction of the image reading apparatus 10. The arrow RI is the right direction of the image reading device 10 and the main scanning direction (the moving direction of the housing member 30) when the reading device body 50 reads the document placed on the document table 14. The document placed on the document table 14 has a longitudinal direction in the left-right direction.

  As shown in FIG. 1, the image reading apparatus 10 has a document table 14 on which an original is placed on the upper side of a housing 12. The document table 14 is a transparent glass plate formed in a rectangular shape (rectangular shape) whose longitudinal direction is the left-right direction, and is opened and closed by a cover body 16. The cover body 16 is formed in a rectangular shape (rectangular shape) that is slightly larger than the document table 14 and can be opened and closed in the vertical direction by a pair of left and right hinges 15 provided on the rear side of the housing 12. Has been.

  As shown in FIG. 2, a reading device main body (CIS unit) 50 that reads a document placed on the document table 14 is provided inside the casing 12 (below the document table 14). The reading device main body 50 has a length equal to or longer than the length of the document in the short direction (direction orthogonal to the longitudinal direction of the document), and moves in the main scanning direction (from one end of the document in the longitudinal direction to the other end). The document is read. A moving mechanism 20 is provided in the housing 12 (below the document table 14) to move the reading device main body 50 (a storage member 30 described later) in the main scanning direction.

  More specifically, the moving mechanism 20 has a columnar shaft 22 provided in a substantially central portion in the front-rear direction in the housing 12 with the left-right direction (main scanning direction) as an axial direction. The shaft 22 has both left and right end portions fixed to a support portion 18 formed integrally with the left and right end portions in the housing 12, and a housing member (carriage housing) 30 in which the reading device main body 50 is housed. It is supported so as to be movable in the main scanning direction (right direction) and in the opposite return direction (left direction).

  The moving mechanism 20 includes a timing pulley 24 provided on the right end portion (one axial end portion of the shaft 22) side in the housing 12 and a left end portion (the other axial end portion of the shaft 22) in the housing 12. A timing pulley 26 provided on the side, a timing belt 28 wound around the timing pulley 24 and the timing pulley 26 so as to mesh with meshing teeth 28A formed on the inner peripheral surface, and one (for example, the right side) And a drive motor (not shown) that is provided coaxially with the timing pulley 24 and rotationally drives the timing pulley 24 in both forward and reverse directions.

  Therefore, the timing pulley 24 is rotated in both forward and reverse directions by driving the drive motor, so that one side of the timing belt 28 is moved in the main scanning direction and the other side is moved in the return direction. That is, the front and rear one side and the front and rear other side of the timing belt 28 move in the opposite directions in synchronization with each other. As shown in FIG. 3, the housing member 30 is attached to the front timing belt 28, for example.

  More specifically, the housing member 30 is a casing whose longitudinal direction (the direction orthogonal to the main scanning direction in plan view) is the longitudinal direction (the length is equal to or greater than the length in the short direction of the document). In order to ensure dimensional accuracy and suppress deformation due to temperature, it is molded from a glass-filled resin material (for example, a glass-filled flame-retardant modified PPE (polyphenylene ether) molding material). 2 to 5, a guide member 34 supported by the shaft 22 is attached to a substantially central portion in the longitudinal direction on the lower surface side of the bottom wall 32 of the housing member 30.

  As shown in FIG. 3 and FIG. 5, the guide member 34 has a concave groove portion having a substantially inverted “U” shape when viewed from the main scanning direction at the downstream end and the upstream end in the main scanning direction. 36, and each concave groove portion 36 is placed on the outer peripheral surface of the shaft 22 from above, so that the substantially central portion in the longitudinal direction of the housing member 30 is supported by the shaft 22. In addition, as shown in FIG. 2, both ends in the longitudinal direction of the housing member 30 are supported by a support base 17 formed integrally with the housing 12 so as to be movable.

  Further, as shown in FIG. 3 and FIG. 5, the meshing teeth 28 </ b> A of the timing belt 28 and the central portion in the longitudinal direction (rear side of the guide member 34) on the lower surface side of the bottom wall 32 adjacent to the guide member 34. A meshing portion 38 to be meshed is integrally formed. The meshing portion 38 is formed in a rectangular block shape, and a gap larger than the thickness of the timing belt 28 is formed in the central portion of the lower end. A meshing tooth 38 </ b> A is formed on the inner surface of one (rear side in the present embodiment) in the gap of the meshing portion 38.

  Therefore, as shown in FIG. 3, the front side of the timing belt 28 is inserted into the gap of the meshing portion 38, and the front meshing tooth 28 </ b> A meshes with the meshing tooth 38 </ b> A, so that the housing member 30 is interposed via the meshing portion 38. The timing belt 28 is fixed in the circumferential direction. As a result, with the movement of the timing belt 28, the housing member 30 is moved in the main scanning direction and the return direction while being supported by the shaft 22 and the support base 17.

  As shown in FIG. 2, a flexible cable 40 for sending image data read by the reading device main body 50 is disposed in the housing 12 on the rear side of the timing belt 28. One end 40 </ b> A of the cable 40 is connected to the reading device main body 50. The flexible cable 40 can follow the movement of the housing member 30 that houses the reader main body 50.

  As shown in FIG. 4, in the reading apparatus main body 50, the longitudinal direction (the direction perpendicular to the main scanning direction in plan view) is the longitudinal direction (the length is equal to or longer than the length in the short direction of the document). It is formed in a long shape, and is formed of a glass-filled resin material (for example, a glass-filled flame-retardant modified PPE (polyphenylene ether) molding material) in order to ensure dimensional accuracy and suppress deformation due to temperature. A reading unit 52 is provided along the longitudinal direction of the reading device main body 50 (extending in the longitudinal direction) at the upper portion of the reading device main body 50 and at the center in the width direction (left and right direction, main scanning direction). ing.

  Further, as shown in FIG. 6, the reading device main body 50 is inserted and accommodated in the accommodation member 30 from above. Note that an insertion portion 54 and a protrusion 56 described later provided on the front wall 50A and the rear wall 50B (see FIG. 5) of the reading device main body 50 are formed symmetrically in the front-rear direction. Similarly, notch portions 42 and ribs 46 (see FIG. 9), which will be described later, provided on the front wall 30A and the rear wall 30B (see FIG. 5) of the housing member 30 are also formed symmetrically in the front-rear direction.

  More specifically, as shown in FIG. 6, the front wall 50 </ b> A and the rear wall 50 </ b> B (see FIG. 5) of the reading device main body 50 are respectively convex (prism-shaped) protruding in the longitudinal direction of the reading device main body 50. Are integrally formed at the same position in the main scanning direction. As shown in FIG. 4, a convex shape (a prismatic shape) that protrudes in the main scanning direction (right direction) is inserted into one end (for example, the rear side) in the longitudinal direction of the right side wall 50 </ b> C of the reading apparatus main body 50. The part 55 is integrally formed.

  On the other hand, on the front wall 30A and the rear wall 30B (see FIG. 5) of the housing member 30, a cutout portion 42 as an example of an inserted portion whose upper side is opened is formed at the same position in the main scanning direction. As shown in FIG. 4, a notch 43 as an example of an inserted portion whose upper side is opened is formed on one end side (for example, the rear side) in the longitudinal direction of the right side wall 30 </ b> C of the housing member 30. Yes.

  Here, the widths of the notches 42 and 43 are formed to be the same as or slightly larger than the widths of the insertion portions 54 and 55, respectively. Therefore, when the reading device main body 50 is accommodated in the accommodating member 30, the insertion portions 54 and 55 are inserted into the notch portions 42 and 43 with almost no gap (see FIG. 7).

  As shown in FIGS. 6, 7, and 9, an engaging portion 70, which will be described later, has a height at a substantially central lower portion of the front wall 30 </ b> A and the rear wall 30 </ b> B (see FIG. 5) of the housing member 30. An opening 44 as an example of an engaged portion that can be engaged in a direction (vertical direction) is formed. The opening 44 is formed in a rectangular shape whose height direction is the longitudinal direction, and is formed by cutting out both ends in the longitudinal direction of the bottom wall 32 and a part of a substantially central portion in the left-right direction. Yes.

  As shown in FIG. 9, a coil spring 48, which will be described later, is provided at both ends of the upper surface (bottom surface) of the bottom wall 32 on the inner side in the longitudinal direction of the housing member 30 with respect to the opening 44 and at the substantially central portion in the left-right direction. A boss portion 33 to which a lower end portion of the boss portion 33 is fitted is integrally projected. The boss portion 33 is formed in a cross shape in plan view, and is inserted into the annular lower end portion of the coil spring 48 when the reading device main body 50 is accommodated in the accommodating member 30. Yes.

  In addition, spacers 60 as an example of a positioning member are attached to both ends in the longitudinal direction of the reading apparatus main body 50. As shown in FIGS. 4 and 6 to 8, each spacer 60 is formed in a substantially inverted “U” shape when viewed from the longitudinal direction (front-rear direction) of the reading apparatus body 50, and the pair of legs The portion 62 is bent so as to be separated from the front wall 50A and the rear wall 50B (an engagement portion 70 described later) of the reading device main body 50 toward the center in the longitudinal direction when viewed from the main scanning direction (left-right direction).

  And the nail | claw part 63 as an example of a latching | locking part is formed in the lower end part of a pair of leg part 62, respectively. As shown in FIGS. 5 and 6, an example of a locked portion to which the claw portion 63 is locked at the lower end portion of the left side wall 50 </ b> D (see FIG. 7) and the right side wall 50 </ b> C of the reading device main body 50. As shown, a notch 53 is formed.

  Further, the upper ends of the pair of leg portions 62 are integrally connected by a rectangular flat plate-like connecting portion 64 whose longitudinal direction is the width direction (left-right direction, main scanning direction) of the reading apparatus main body 50. A columnar boss 68 inserted into a boss hole 58 formed at both ends in the longitudinal direction of the upper portion of the reading device main body 50 is formed on the lower surface of the connecting portion 64. , In the main scanning direction) and projecting integrally at a predetermined interval.

  Therefore, as shown in FIG. 5, in the spacer 60 provided as a pair of front and rear, each boss portion 68 is inserted into each boss hole 58, and each claw portion 63 formed at the lower end portion of the pair of leg portions 62 includes By being engaged with each notch 53 formed in the reading device main body 50, the reading device main body 50 is attached to both ends in the longitudinal direction.

  Further, as shown in FIGS. 7 and 8, the upper surface of the connecting portion 64 has a substantially semicircular shape (substantially semicircular plate shape) when viewed from the longitudinal direction (front-rear direction) of the reading apparatus main body 50. The portion 66 is integrally projected with a predetermined interval in the width direction (left and right direction, main scanning direction) of the reading apparatus main body 50 (a convex portion 66 is formed on the opposite side of the boss portion 68. ing).

  As shown in FIG. 3, the pair of convex portions 66 can slide in the main scanning direction and the return direction on the back surface of the document table 14 with a predetermined pressure (biasing force of a coil spring 48 described later). To come into contact. Therefore, the spacer 60 is formed of polyacetal (POM), which is an example of a resin material having good sliding properties with respect to the document table 14.

  As shown in FIGS. 4 to 8, the spacer 60 has a connecting portion 64 that extends downward in the center in the left-right direction of one of the side edges (outside in the longitudinal direction of the reading apparatus main body 50). The engaging portion 70 is integrally formed. The engaging portion 70 is disposed to face the front wall 50 </ b> A and the rear wall 50 </ b> B of the reading device main body 50, and the height thereof is higher than the height of the reading device main body 50.

  That is, the lower end portion of the engaging portion 70 protrudes downward from the lower surface of the reading device main body 50. Then, the plate thickness from the middle part of the engaging part 70 to the lower side so that the lower end part of the engaging part 70 protruding downward from the lower surface of the reading apparatus main body 50 can be elastically deformed in the front-rear direction. Is formed thinner than the upper plate thickness. A lower end portion (claw portion 72 described later) of the engaging portion 70 can be engaged with the opening portion 44 of the housing member 30 in the height direction.

  More specifically, a claw portion 72 that protrudes outward in the longitudinal direction of the reading device main body 50 is formed at the lower end portion of the engaging portion 70, and an upper surface 72A of the claw portion 72 is inclined upward and outward. It is set as the inclined surface which inclines toward. On the other hand, the lower surface 44A at the upper side edge of the opening 44 facing the upper surface 72A of the claw 72 is also an inclined surface that is inclined obliquely upward and outward (see FIG. 5). Thereby, even if the spacer 60 is inclined in the front-rear direction (longitudinal direction of the reading device main body 50), the claw portion 72 is not easily detached from the opening 44.

  In addition, as shown in FIG. 6, the front wall 50 </ b> A and the rear wall 50 </ b> B of the reading device main body 50 are on the opposite side of the engaging portion 70 and adjacent to the engaging portion 70. The protrusion 56 is formed. That is, a slight gap S is formed between the engaging portion 70 and the protruding portion 56.

  And as FIG. 9 shows, the thin-plate-like rib 46 as an example of a guide part is the height direction in the position adjacent to the opening part 44 in the inner surface of the front wall 30A and the rear wall 30B of the accommodating member 30. It is formed along. The thickness of the rib 46 is formed to be the same as or slightly smaller than the width of the gap S.

  Therefore, when the reading device main body 50 is accommodated in the accommodating member 30, the rib 46 is inserted into the gap S between the engaging portion 70 and the protruding portion 56. The mating portion 70 and the protruding portion 56 are accommodated in the accommodating member 30 while being guided by the rib 46.

  Further, as shown in FIGS. 5 and 6, a coil as an example of an urging member is provided between both ends of the lower surface of the reading device main body 50 and both ends of the upper surface (bottom surface) of the bottom wall 32 of the housing member 30. A spring 48 is provided. More specifically, the upper and lower ends of the coil springs 48 provided as a pair of front and rear are attached to both lower end portions of the reading device main body 50, and when the reading device main body 50 is accommodated in the accommodating member 30, the lower end portion Is fitted to the bosses 33 projecting from both ends of the upper surface (bottom surface) of the bottom wall 32 of the housing member 30.

  As shown in FIG. 7, each coil spring 48 is disposed at a position (preferably the same position) that overlaps the lower end of each engaging portion 70 when viewed from the longitudinal direction of the reading apparatus main body 50. That is, each engaging portion 70 is disposed at a position close to each coil spring 48. Further, as shown in FIG. 5, each coil spring 48 is disposed directly below each convex portion 66 when viewed from the main scanning direction. In other words, each protrusion 66 is disposed immediately above each coil spring 48 as viewed from the main scanning direction.

  Next, the operation of the image reading apparatus 10 including the spacer 60 having the above-described configuration (a method for assembling the reading apparatus main body 50 to the housing member 30) will be described.

  First, the upper ends of the coil springs 48 provided as a pair of front and rear are respectively attached to both ends of the lower surface of the reading apparatus main body 50. Then, spacers 60 provided as a pair of front and rear are respectively attached to both ends in the longitudinal direction of the reading apparatus main body 50. That is, the boss portion 68 of each spacer 60 is inserted into the boss hole 58 of the reading device main body 50, and the claw portion 63 of the leg portion 62 is locked to the notch portion 53 of the reading device main body 50.

  Here, the notch 53 of the reading device main body 50 is formed at a position away from the front wall 50A and the rear wall 50B. The claw portion 63 in the leg portion 62 of the spacer 60 is formed at a position away from the engaging portion 70. Therefore, even when a force that pushes up the engaging portion 70 is relatively applied, such as when the reading device main body 50 is inserted into the housing member 30, the engaging portion 70 is engaged by the claw portion 63 locked to the notch portion 53. Since the inclination of the joint portion 70 can be suppressed, it is possible to suppress or prevent the claw portion 63 from being detached from the notch portion 53.

  After the coil spring 48 and the spacer 60 are attached to the reading device main body 50, the reading device main body 50 is accommodated in the accommodating member 30. That is, the engaging portion 70 (claw portion 72) of each spacer 60 is elastically deformed toward the front wall 50A side and the rear wall 50B side of the reading device main body 50 by the front wall 30A and the rear wall 30B of the housing member 30, respectively. The reading device main body 50 is inserted into the housing member 30 from above while the rib 46 of the housing member 30 is inserted into the gap S between the protrusion 56 and the engaging portion 70 of the reading device main body 50.

  Here, the lower end portion (claw portion 72) of the engaging portion 70 protrudes downward from the lower surface of the reading apparatus main body 50. Therefore, as the reading device main body 50 is inserted into the housing member 30, the lower end portion (claw portion 72) of the engaging portion 70 is guided to the rib 46 early (before the protruding portion 56). The guideability when the reading device main body 50 is inserted into the housing member 30 is improved.

  The reading device main body 50 is further inserted by being perpendicular to the bottom wall 32 of the housing member 30 because the engaging portion 70 and the protruding portion 56 are guided by the rib 46 to further improve the guideability. Further, when viewed from the longitudinal direction of the reading apparatus main body 50, the lower end portion of the engaging portion 70 is disposed at a position (preferably the same position) overlapping with the coil spring 48.

  That is, the engaging portion 70 is disposed in the vicinity of the coil spring 48. Therefore, when the reading device main body 50 is inserted into the housing member 30, the positioning of the coil spring 48 with respect to the boss portion 33 is also improved. Therefore, the lower end portion of the coil spring 48 is easily assembled (fitted) to the boss portion 33 of the housing member 30.

  When the reading device main body 50 is accommodated in the accommodating member 30, the insertion portions 54 and 55 of the reading device main body 50 are inserted into the notch portions 42 and 43 of the accommodating member 30 with almost no gap. Here, the reading device main body 50 and the housing member 30 are formed of a resin material containing glass and have high rigidity (strength). Therefore, the insertion portions 54 and 55 are inserted into the notches 42 and 43, so that the positions of the reading device body 50 in the left-right direction (main scanning direction) and the front-rear direction (longitudinal direction) with respect to the housing member 30 are accurate. Positioned.

  Thus, when the reading device main body 50 is accommodated in the accommodating member 30 while the lower end portion of the coil spring 48 is assembled (fitted) to the boss portion 33, the claw portion 72 of the engaging portion 70 is opened to the opening 44 of the accommodating member 30. And inserted by its elastic restoring force. As a result, the reading device main body 50 is attached to the housing member 30. Therefore, for example, even when the accommodating member 30 in which the reading device main body 50 is accommodated is dropped at the time of manufacturing the image reading device 10, the claw portion 72 engages with the opening 44 in the height direction. Is prevented from falling off from the housing member 30.

  Moreover, the upper surface 72A of the claw 72 is an inclined surface that is inclined obliquely upward and outward, and the lower surface 44A at the upper edge of the opening 44 that faces the upper surface 72A of the claw 72 is also obliquely upward and outward. It is set as the inclined surface which inclines toward. Therefore, when the accommodating member 30 in which the reading device main body 50 is accommodated is dropped, even if the spacer 60 is inclined in the front-rear direction (longitudinal direction of the reading device main body 50), the claw portion 72 may be detached from the opening 44. Is prevented.

  Further, since the convex portion 66 of each spacer 60 is disposed immediately above each coil spring 48 as viewed from the main scanning direction, the efficiency is improved upward by the urging force (elastic restoring force) of each coil spring 48. It is well urged and comes into contact with the back side of the document table 14. Therefore, the position of the reading device main body 50 in the height direction with respect to the document table 14 is accurately positioned by the convex portions 66. It should be noted that the upper surface 72A of the claw portion 72 is provided on the lower surface 44A at the upper edge of the opening 44 in order to allow tolerance of the back surface of the document table 14 with which each convex portion 66 contacts (dimensional error in forming the glass plate). It is considered as non-contact.

  As described above, in the image reading apparatus 10 according to the present embodiment, the reading apparatus body 50 is detached from the housing member 30 by the spacer 60 that positions the reading apparatus body 50 in the height direction with respect to the document table 14. Is prevented. That is, positioning of the reading device main body 50 with respect to the document table 14 and prevention of the reading device body 50 from falling off the housing member 30 are realized with a simple configuration.

  Further, in order to prevent the reading device main body 50 from falling off from the housing member 30, for example, when a claw portion (not shown) that is elastically deformed is formed in the reading device main body 50 or the housing member 30, the reading device main body 50 or the housing member 30. Since it is formed of a resin material containing glass, when the claw portion is elastically deformed, the elastic deformation amount may not be able to be endured. That is, there is a possibility that the reading device main body 50 and the housing member 30 may be cracked by the claw portion.

  However, in the image reading apparatus 10 according to the present embodiment, the claw portion 72 (engaging portion 70) for preventing the dropout is formed not on the reading apparatus main body 50 or the housing member 30 but on the spacer 60 attached to the reading apparatus main body 50. Therefore, there is no possibility that the reading device main body 50 and the housing member 30 are cracked.

  In addition, since the spacer 60 is a small part compared to the reading device main body 50 and the housing member 30, it is easy to manufacture a mold for molding, and the nail portion 72 is damaged and needs to be replaced. Even in this case, it can be easily replaced. Therefore, the image reading apparatus 10 according to the present embodiment is advantageous in terms of cost.

  The image reading apparatus 10 according to the present embodiment has been described with reference to the drawings. However, the image reading apparatus 10 according to the present embodiment is not limited to the illustrated one and does not depart from the gist of the present invention. The design can be changed as appropriate within the range. For example, the shapes of the insertion portions 54 and 55 and the protruding portion 56 are not limited to the illustrated shapes. Moreover, the insertion part 54 and the projection part 56 are not limited to the structure formed symmetrically back and forth.

DESCRIPTION OF SYMBOLS 10 Image reader 14 Document stand 30 Storage member 42 Notch part (an example of an insertion part)
43 Notch (an example of a part to be inserted)
44 opening (an example of engaged portion)
44A bottom surface 46 rib (an example of a guide part)
48 Coil spring (an example of a biasing member)
50 Reading device body 53 Notch (an example of a locked portion)
54 Insertion part 55 Insertion part 56 Projection part 60 Spacer (an example of a positioning member)
62 Leg part 63 Claw part (an example of a latching part)
66 convex part 70 engaging part 72 claw part 72A upper surface

Claims (8)

A reader body for reading a document placed on a document table;
A housing member that houses the reading device body and moves from one end of the document to the other when reading the document;
An urging member provided between a lower surface of the reading device body and a bottom surface of the housing member, and urging the reading device body;
A convex portion attached to the reading device main body, biased from the biasing member via the reading device main body, and positioned in the height direction of the reading device main body by contacting the document table; and the housing member A positioning member having an engaging portion engaged with the engaged portion formed in the height direction,
An image reading apparatus comprising: A reader body for reading a document placed on a document table;
A housing member that houses the reading device body and moves from one end of the document to the other when reading the document;
A convex portion that is attached to the reading device main body and is positioned in the height direction of the reading device main body by being in contact with the document table, and is engaged with an engaged portion formed in the housing member in the height direction. A positioning member having an engaging portion,
With
The reader main body has a protrusion at a position adjacent to the engaging portion,
The housing member, when said reading apparatus unit is accommodated, the image reading apparatus that having a guide portion for guiding said projection portion and the engaging portion.   The image reading device according to claim 1, wherein a lower end portion of the engaging portion protrudes downward from the reading device main body. A reader body for reading a document placed on a document table;
A housing member that houses the reading device body and moves from one end of the document to the other when reading the document;
A biasing member provided between both lower end portions of the reading device main body and both bottom end portions of the housing member;
A convex portion that is attached to the reading device main body and is positioned in the height direction of the reading device main body by being in contact with the document table, and is engaged with an engaged portion formed in the housing member in the height direction. A positioning member having an engaging portion,
With
When viewed from the longitudinal direction of the reading apparatus unit, wherein the engaging portion includes an image reading apparatus that is disposed at a position overlapping with the biasing member. A reader body for reading a document placed on a document table;
A housing member that houses the reading device body and moves from one end of the document to the other when reading the document;
A biasing member provided between both lower end portions of the reading device main body and both bottom end portions of the housing member;
A convex portion that is attached to the reading device main body and is positioned in the height direction of the reading device main body by being in contact with the document table, and is engaged with an engaged portion formed in the housing member in the height direction. A positioning member having an engaging portion,
With
When viewed from the moving direction of the housing member, the convex portion, the image reading apparatus that is arranged directly above the biasing member. A reader body for reading a document placed on a document table;
A housing member that houses the reading device body and moves from one end of the document to the other when reading the document;
A convex portion that is attached to the reading device main body and is positioned in the height direction of the reading device main body by being in contact with the document table, and is engaged with an engaged portion formed in the housing member in the height direction. A positioning member having an engaging portion,
With
The housing member has an inserted portion whose upper part is opened,
The reading apparatus main body, when it is housed in the housing member, the image reading apparatus that having a insertion portion to which the is inserted into the receptacle. A reader body for reading a document placed on a document table;
A housing member that houses the reading device body and moves from one end of the document to the other when reading the document;
A convex portion that is attached to the reading device main body and is positioned in the height direction of the reading device main body by being in contact with the document table, and is engaged with an engaged portion formed in the housing member in the height direction. A positioning member having an engaging portion,
With
The positioning member has a pair of leg portions, and a latching portion formed on the leg portions is formed at a position away from the engagement portion toward the longitudinal central portion of the reader body. by being engaged with the locking portion, the image reading apparatus that is attached to the reader body. A reader body for reading a document placed on a document table;
A housing member that houses the reading device body and moves from one end of the document to the other when reading the document;
A convex portion that is attached to the reading device main body and is positioned in the height direction of the reading device main body by being in contact with the document table, and is engaged with an engaged portion formed in the housing member in the height direction. A positioning member having an engaging portion,
With
A claw portion is formed in the engaging portion, and the upper surface of the claw portion is an inclined surface that is inclined obliquely upward and outward,
Image reading apparatus underside of the engaged portion facing the upper surface of the claw portion also being an inclined surface which is inclined toward the obliquely upward outwardly.