JPH0597166U - Reader - Google Patents

Abstract

(57) [Summary] [Object] To provide a reading device capable of reducing the number of parts and simplifying the manufacturing process. [Construction] The reading device includes a light transmitting plate 11, a light source 12, a lens array 14, a light receiving element 15, a housing 10 for holding the light transmitting plate 11, a light source 12, and a lens array 14, and a housing 1.
0 and the first elastic member 20 that holds the lens array 14 therebetween.
And a second elastic member 30 that covers the end surface of the housing 10 and locks the translucent plate 11 and the like.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a reading device that is used in a facsimile, a copying machine, a contact image sensor, a card reader, an image scanner, etc., and reads a document and outputs an image signal.

[0002]

[Prior Art]

 In a reading device that reads an image in the main scanning direction while conveying the original in the sub-scanning direction, a translucent plate that contacts the original, a light source that illuminates the original, and a lens that forms reflected light from the original There is known a reading device in which an array and a light receiving element for receiving a document image formed by a lens array are integrally incorporated.

FIG. 9 to FIG. 11 show an example of a conventional reading device, FIG. 9 is a partial perspective view showing a fixing means of a transparent plate, and FIG. 10B is a partial perspective view showing the means, FIG. 10B is a side view of a main part thereof, and FIG. 11 is a side view showing a fixing means of the end face cover. In FIG. 9, a translucent plate 61 made of glass or the like is supported in an opening on the upper surface of the housing 60, and a translucent plate retainer 62 having two claws is tightened with screws 63a and 63b. It is fixed. Further, in FIGS. 10A and 10B, the lens array 64 is supported in close contact with the inner wall of the housing 60, and the lens retainer 66 having the two spring members 67 a and 67 b is the upper surface of the lens array 64. The lens array 64 is fixed by tightening the screw 68 while pressing the side surface. In addition, in FIG. 11, an end face cover 69 that covers the end face in the longitudinal direction of the housing 60 is fixed to the housing 60 by screws 70a and 70b in order to shield the reading device from light and prevent dust. The translucent plate retainer 62, the lens retainer 66 and the end face cover 69 are made by cutting or bending an iron plate, a stainless steel plate, an aluminum plate or the like. A substrate on which a light source for illuminating the original is arranged is fixed to the inclined surface 71 inside the housing 60, and a plurality of light receiving elements are linearly arranged on the inner surface of the bottom plate 65.

FIG. 12 is a side view showing another example of the conventional reading device. The transparent plate 82, the LED bar light source 83, the lens array 84, and the substrate 85 are attached to a long frame 87 extending in the longitudinal direction, and the lens array 84 is attached to a mounting surface provided in the frame 87. It is abutted against 87a, and is fixed and held by injecting a resin 89 such as an adhesive into the groove 87b (Japanese Utility Model Publication No. 4-10457).

[0005]

[Problems to be solved by the device]

 Since the reading device shown in FIGS. 9 to 11 requires three members, that is, the translucent plate retainer 62, the lens retainer 66, and the end face cover 69, the manufacturing cost rises due to the large number of parts, and the screw fastening points are required. However, there is a problem that the manufacturing process is complicated due to the large number of defects.

Further, in the reading apparatus shown in FIG. 12, since the constituent members such as the lens array 84 are fixed by the adhesive, the position adjustment (optical fine adjustment) becomes impossible after the adhesion once. There is a problem. Furthermore, there is a problem that it is not practical because the stress load due to vibration, impact, thermal cycle, etc. acts directly on the adhesive, and the fixing strength deteriorates due to the aging of the adhesive.

An object of the present invention is to provide a reading device capable of reducing the number of parts and simplifying the manufacturing process in order to solve the above-mentioned problems.

[0008]

[Means for Solving the Problems]

 The present invention provides a light-transmitting plate that is in contact with a document, a light source that irradiates the document with light through the light-transmitting plate, and a lens array that forms reflected light from the document through the light-transmitting plate. A reading device including a light-receiving element that receives a document image formed by the lens array, and a housing that holds the light-transmitting plate, the light source, and the lens array, wherein the housing includes a first groove and a second groove. By forming a groove and inserting a first elastic member for sandwiching the housing and the lens array into the first groove, the lens array is joined to the housing, and the second groove covers the end surface of the housing. The reading device is characterized in that the transparent plate and the lens array are fixed to the housing by inserting a second elastic member having a shape to which both ends of the transparent plate and the lens array are hooked.

[0009]

[Action]

 According to the present invention, the first elastic member having a plurality of protrusions is inserted along the first groove formed in the housing, so that the lens array is sandwiched and the housing is By inserting a second elastic member having a shape covering the end face and having a plurality of protrusions formed along the second groove formed in the housing, the light transmitting plate is locked and the lens array. The fixed part reduces the number of parts and screw points.

[0010]

【Example】

 FIG. 1 is a side view showing a reading device according to an embodiment of the present invention. The reading device shown in FIG. 1 includes a light-transmitting plate 11 such as a glass plate or an acrylic plate that comes into contact with the document 1, and a light-emitting diode array, a fluorescent lamp, a lamp, or the like that irradiates the document 1 with light through the light-transmitting plate 11. A source 12, a lens array 14 such as a rod lens array or a single lens array for forming an image of reflected light from the original 1 through a light transmitting plate 11, and a primary for receiving an original image formed by the lens array 14. A light-receiving element 15 such as an original solid-state image sensor or a two-dimensional solid-state image sensor, a housing 10 that holds the translucent plate 11, the light source 12, and the lens array 14, and a first elastic member 20 that holds the housing 10 and the lens array 14 therebetween. And a second elastic member 30 that covers the end surface of the housing 10 and locks the translucent plate 11, and the light source substrate 13 on which the light source 12 is arranged is fixed to the inclined surface 18 inside the housing 10. , Photosensor A circuit board 16 for controlling the child 15 and the light receiving element 15 is fixed inside the bottom plate 17.

First, the fixing means of the lens array 14 will be described. FIG. 2 is an exploded perspective view showing the relationship between the housing 10 and the lens array 14 and the first elastic member 20, and FIG. 3 is a front view, a side view, and a bottom view of the first elastic member 20. The first elastic member 20 has a plurality of projection pieces 21, 22, 23 formed by cutting, bending, and pressing a plate material having elasticity such as an iron plate, a stainless steel plate, an aluminum plate, and a phosphor bronze plate. The parallel plate-shaped projection piece 21 is inserted and attached along the first groove 25 formed in the outer wall of the housing 10. The projecting piece 22 bent at an acute angle presses the upper surface of the lens array 14, and the projecting piece 23 bent similarly at an acute angle presses the side surface of the lens array 14, and sandwiches the lens array 14 together with the projecting piece 21.

As shown in the partial perspective view of FIG. 4, an adjusting screw 24 is in contact with the bottom surface of the lens array 14, and the height of the lens array 14 is fixed together with the elastic force of the protruding piece 22. The adjusting screw 24 is also provided at the symmetrical position on the other end face side.

FIG. 5 is a side view showing a state in which the first elastic member 20 is inserted and attached. Even if the protruding piece 21 of the first elastic member 20 is fitted to the first groove 25 to such an extent that a slight gap is generated, the entire first elastic member 20 is sandwiched by the second elastic member 30. The adjusting screw 24 is screwed into an internal thread portion formed in the housing 10 through an escape hole formed in the bottom plate 17, and abuts by rotating the adjusting hexagon socket screw 24 with a hexagon wrench or the like. The lens array 14 moves up and down along the inner wall 26 of the housing 10. After the height adjustment of the lens array 14 is completed, a screwing paint is applied to the female screw portion of the housing 10 and fixed.

Next, the fixing means of the transparent plate 11 will be described. FIG. 6 is an exploded perspective view showing the relationship between the housing 10 and the translucent plate 11 and the second elastic member 30, and FIG. 7 is a front view, a side view and a bottom view of the second elastic member 30. Similarly to the first elastic member 20, the second elastic member 30 includes a plurality of protrusion pieces 31 by cutting, bending, and pressing an elastic plate material such as an iron plate, a stainless steel plate, an aluminum plate, and a phosphor bronze plate. 32 and 33 are formed.

The parallel plate-shaped projection piece 31 having the claw 31 a at its tip is inserted along the second groove 35 formed to be larger than the width of the first groove 25 of the housing 10, and the claw 31 a is formed on the housing 10. It is hooked to the vertical groove 37 formed. As shown in the partial perspective view of FIG. 8, the projecting piece 32 holds down the surface of the translucent plate 11 mounted in the opening of the housing 10. The parallel plate-shaped projection piece 33 is inserted along the second groove 35 formed in the outer wall of the housing 10, and is fixed to the housing 10 by the fixing screw 34 through the hole 33a formed in the projection piece 33. To be done.

As shown in FIGS. 1 and 8, the second elastic member 30 has a shape that covers the entire end face in the longitudinal direction of the housing 10, and the light that enters the inside of the housing 10 from the outside and The light that leaks from the light source 10 inside the housing 10 to the outside is blocked, and dust and dust are prevented from entering the inside of the housing 10. Further, by inserting and attaching the second elastic member 30, the movement of the lens array 14 in the longitudinal direction is suppressed and fixed. In addition, the movement of the transparent plate 11 is restrained and fixed.

As described above, by inserting the two members of the first elastic member 20 and the second elastic member 30 along the first groove 25 and the second groove 35 formed in the housing 10, the lens array is inserted. It is possible to easily and surely fix 14 and the translucent plate 11 and attach the end face cover.

[0018]

[Effect of the device]

 As described above in detail, according to the present invention, the lens array is firmly sandwiched by inserting the first elastic member having the plurality of protrusions along the first groove formed in the housing. Therefore, there is almost no rattling when adjusting the height of the lens array, and quick focus adjustment can be performed. Also, after inserting the first elastic member, insert a second elastic member having a shape covering the end surface of the housing and having a plurality of projection pieces formed along the second groove formed in the housing. By this, the translucent plate is securely hooked and the lens array is firmly fixed, so that the misalignment of the translucent plate and the lens array is eliminated, and the light shielding and dustproof are ensured, and the read signal is S / N ratio and image quality are improved.

Furthermore, since the number of parts and screwing points can be reduced as compared with the conventional case, the manufacturing cost can be reduced and the manufacturing process can be simplified.

[Brief description of drawings]

FIG. 1 is a side view showing a reading device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing the relationship between the housing 10 and the lens array 14 and the first elastic member 20.

FIG. 3A is a front view of the first elastic member 20, FIG.
3B is a side view thereof, and FIG. 3C is a bottom view thereof.

FIG. 4 is a partial perspective view showing a state in which a first elastic member 20 is inserted and attached.

FIG. 5 is a side view showing a state in which a first elastic member 20 is inserted and attached.

FIG. 6 shows a housing 10, a transparent plate 11, and a second elastic member 30.
It is an exploded perspective view showing the relationship with.

7 (a) is a front view of the second elastic member 30, FIG.
7B is a side view thereof, and FIG. 7C is a bottom view thereof.

FIG. 8 is a partial perspective view showing a state in which a second elastic member 30 is inserted and attached.

FIG. 9 is a partial perspective view showing a conventional fixing means for a transparent plate.

FIG. 10 (a) is a partial perspective view showing a conventional fixing means of a lens array, and FIG. 10 (b) is a side view of its essential part.

FIG. 11 is a side view showing a fixing means for a conventional end face cover.

FIG. 12 is a side view showing another example of a conventional reading device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 original 10 housing 11 light transmitting plate 12 light source 13 light source substrate 14 lens array 15 light receiving element 16 light receiving element control circuit 17 bottom plate 18 inclined surface 20 first elastic member 21, 22, 23 projection piece 24 adjusting screw 25 first groove 26 inner wall 30 2nd elastic member 31, 32, 33 Protrusion piece 31a Claw 33a Hole 34 Fixing screw 35 Second groove 37 Vertical groove

Claims (1)

[Scope of utility model registration request] 1. A light-transmitting plate that is in contact with a document, a light source that irradiates the document with light through the light-transmitting plate, and a lens array that forms reflected light from the document through the light-transmitting plate. A light-receiving element that receives a document image formed by the lens array, and a housing that holds the light-transmitting plate, the light source, and the lens array, wherein the housing has a first groove and a first groove. By forming two grooves and inserting a first elastic member for sandwiching the housing and the lens array into the first groove, the lens array is joined to the housing, and the end surface of the housing is inserted into the second groove. A reading device in which a transparent plate and a lens array are fixed to a housing by inserting and attaching a second elastic member that covers both ends of the transparent plate and the lens array.