Shell with novel joint line position design and contact type image sensor thereof

Abstract

The utility model discloses a housing with a novel joint line position design and a contact type image sensor thereof, the housing is provided with a lens mounting groove for mounting a cylindrical lens and a substrate mounting surface for mounting a substrate, and the groove bottom of the lens mounting groove is of a non-closed structure to form a light emitting channel. A planar lens mounting bearing platform is formed above the light emitting channel, the light emitting channel is located over the photosensitive sensor on the substrate, the bottom of the light emitting channel does not make contact with the substrate, the two sides of the light emitting channel are vertical planes, and bottom edges of the vertical planes of the light emitting channel are male and female die joint line positions. And inclined planes are arranged on two sides below the light emitting channel to form a cavity with a wide lower part and a narrow upper part. The optimized shell is applied to the contact type image sensor, a space is increased on the shell to form a non-contact surface, a joint line position is placed on the non-contact surface, and when the joint line position is lifted up relative to a substrate and assembled, the joint line position is not in contact with other parts, so that the probability that burrs at the joint line position fall off is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to sensor equipment technical field more specifically relates to a novel shell of mold line position design and contact image sensor. BACKGROUND

[0002] The contact image sensor is mainly applied to general scanner, fax machine, multifunctional all-in-one machine and is used for scanning and identifying original image, with the development of technology, the contact image sensor is also used in automatic teller machine, cash letter machine and bill scanner.

[0003] With the continuous improvement of product sensor resolution, the requirement of environment and raw material particles is also higher and higher, and 20 microns or even 5 microns of particles will affect the performance when shielding on the sensor.

[0004] The mold of the plastic shell includes a male mold and a female mold, and a line is formed when the mold is closed, and the line position is easy to produce burrs, and when the burrs are pressed by other objects during assembly, they are easy to fall off, thereby having the probability of blocking the sensor and causing problems.

[0005] As shown in Figure 1 The shell 101, the columnar lens 102, the substrate 103, the photosensitive sensor 104, the light source 105 and the mold line position 106. When the line is designed on the assembly platform of the columnar lens, the columnar lens assembly will press the burr, and the burr will be broken and partially pressed or fallen off. When the line is designed on the assembly surface of the substrate, the burr will also be pressed and fallen off during the substrate assembly. Therefore, no matter where the mold line is placed, other components will contact the burr, and the fallen burr may block the sensor when it is shaken.

[0006] Therefore, the shell structure needs to be optimized to make a better contact image sensor. UTILITY MODEL CONTENTS

[0007] In order to solve the above problems, the utility model provides a shell with novel mold line position design, which is applied to the contact image sensor, the mold line position does not contact other components outside the shell, and the probability of burr falling is reduced.

[0008] According to one aspect of the utility model, a kind of shell of novel die line position design is provided, the front of shell is equipped with the lens installation slot for columnar lens installation, the back of shell is equipped with the substrate installation surface for substrate installation, the groove bottom of lens installation slot is formed light passage with non-closed structure, and the upper portion of light passage is formed flat lens installation bearing platform, light passage is located just above the photosensitive sensor on substrate, the bottom of light passage does not contact substrate, the two sides of light passage are vertical plane, the bottom of vertical plane of light passage is male and female die die line position, the two sides below light passage are equipped with inclined plane and form the cavity of lower width and upper narrowness. Therefore, die line position is not set on the assembly surface of columnar lens, also not set on the assembly surface of substrate, but die line position is pulled up relative to substrate installation surface, die line position is elevated, so that die line position does not contact other components of contact image sensor, that is, not contact columnar lens, substrate, to reduce the probability of burr falling at die line position, reduce the influence of burr falling on photosensitive sensor.

[0009] In some embodiments, the vertical plane and the inclined plane are connected by a horizontal transition surface, and the straight angle corner formed by the connection of the horizontal transition surface and the vertical plane is the male and female die die line position. Therefore, the setting of a horizontal transition surface is beneficial to the processing of the male and female dies on the one hand, and avoids the formation of a round corner after injection molding on the other hand.

[0010] In some embodiments, the bottom edge of the inclined plane is higher than the substrate installation surface, so that a raised area is formed above the photosensitive sensor on the substrate. Therefore, for a shell with a permissible size, a raised area is provided to separate the substrate installation surface from the light passage, improve the die line position, and also reduce the weight of the shell.

[0011] In some embodiments, the two sides of the raised area are provided with vertical surfaces perpendicular to the substrate installation surface, and the distance between the two vertical surfaces is wider than the distance between the bottom edges of the two inclined surfaces. Therefore, the width of the raised area is greater than the width of the bottom edges of the two inclined surfaces, further separating the contact between the substrate installation surface and the substrate from the photosensitive sensor, and reducing the possible influence of the substrate installation surface on the photosensitive sensor.

[0012] According to one aspect of the utility model, provide a kind of contact image sensor, the contact image sensor includes above-mentioned shell, columnar lens is vertically arranged in the lens installation groove of shell, lens installation abutment provides support for columnar lens bottom, substrate is installed at substrate installation surface, substrate is equipped with photosensitive sensor, photosensitive sensor is located just below light outlet passage, male and female mold line position is far from the assembly surface of substrate and shell, the assembly surface of columnar lens and shell, light source is installed in shell, the light of light source enters columnar lens after being reflected and is inducted by photosensitive sensor. Thus, the shell of this kind of mold line position optimization is applied to contact image sensor, under the premise of guaranteeing that columnar lens and substrate are normally installed, the mold line position is lifted relative to substrate installation surface, increase the space above substrate and photosensitive sensor, the mold line position is designed on a non-contact surface, can guarantee that the burr of shell mold line position does not contact with other components when component assembly, the probability of burr falling is greatly reduced.

[0013] Compared with prior art, the utility model has the advantages that: the shell structure is novel, the mold line position of male and female mold is optimized, the mold line position is not on the assembly surface of columnar lens nor on the assembly surface of substrate, but the space above substrate and photosensitive sensor is increased, a non-contact surface is formed, the mold line position is placed on the non-contact surface, the optimized shell is applied to contact image sensor, without affecting the assembly of columnar lens and the assembly of substrate, and the mold line position does not contact with other components during assembly, the probability of burr falling at the mold line position is greatly reduced, and the quality of contact image sensor can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structural schematic diagram of contact image sensor in prior art;

[0015] Figure 2 It is the structural schematic diagram of one embodiment of the contact image sensor with the shell of novel mold line position design of the utility model. DETAILED DESCRIPTION

[0016] The utility model will be further described below in combination with specific embodiment.

[0017] As Figure 2 shown, the shell of novel mold line position design of one embodiment of the utility model, the shell 1 is applied to contact image sensor.

[0018] Considering that the line position 10 is pressed to the columnar lens assembly surface or the substrate assembly surface in the columnar lens light path area, but there is no optimization space because the columnar lens 2 is very thin and the support width on both sides is very small, and the width of the substrate 3 is wide, the width of the non-contact area can be expanded, and then the line position 10 is lifted upward.

[0019] The shell 1 is a plastic shell formed by injection molding after the male and female molds are combined.

[0020] The front surface of the shell 1 has a lens mounting groove 11 for mounting the columnar lens 2, and the back surface of the shell 1 has a substrate mounting surface 15 for mounting the substrate 3. The groove bottom of the lens mounting groove 11 is a non-closed structure, forming a light exit channel 12, and the upper part of the light exit channel 12 forms a flat lens mounting platform 111. The light exit channel 12 is located directly above the photosensitive sensor 4 on the substrate 3, the bottom of the light exit channel 12 does not contact the substrate 3, the two sides of the light exit channel 12 are vertical planes 121, and the bottom of the vertical plane 121 of the light exit channel 12 is the male and female mold line position 10. The lower sides of the light exit channel 12 are provided with inclined surfaces 131 to form a cavity 13 with a lower width and an upper narrowness.

[0021] Specifically, on the shell 1, the vertical plane 121 of the light exit channel 12 and the inclined surface 131 below it are connected by a horizontal transition surface 132, and the connection between the horizontal transition surface 132 and the vertical plane 121 forms a right angle, which is the male and female mold line position 10. In this way, by setting a horizontal transition surface 132, on the one hand, it is beneficial to the processing of the male and female molds, and on the other hand, it avoids the formation of a round corner after injection molding.

[0022] The bottom edge of the inclined surface 131 is higher than the substrate mounting surface 15, so that a raised area 14 is formed above the photosensitive sensor 4 on the substrate 3. For a shell 1 of a certain size, a raised area 14 is provided to separate the substrate mounting surface 15 from the light exit channel 12, increase the line position 10, and also reduce the weight of the shell 1.

[0023] The two sides of the raised area 14 have vertical surfaces 141 perpendicular to the substrate mounting surface 15, and the distance between the two vertical surfaces 141 is wider than the distance between the bottom edges of the two inclined surfaces 131. In this way, the width of the raised area 14 is greater than the width of the bottom edges of the two inclined surfaces 131, further moving the contact between the substrate mounting surface 15 and the substrate 3 away from the photosensitive sensor 4, and reducing the possible impact of the substrate mounting surface 15 on the photosensitive sensor 4.

[0024] The shell 1 optimizes the male and female die joint line position 10, the joint line position 10 is not arranged on the assembly surface of the columnar lens 2, nor on the assembly surface of the substrate 3, but is lifted up relative to the substrate mounting surface 15, and the joint line position 10 is lifted up, so that the joint line position 10 does not contact other components of the contact image sensor, that is, does not contact the columnar lens 2 and the substrate 3 when the components of the contact image sensor are assembled, thereby reducing the probability of burr falling at the joint line position 10 and reducing the influence of burr falling on the photosensitive sensor 4.

[0025] The contact image sensor of one embodiment of the utility model includes the above-mentioned shell 1, the columnar lens 2 is vertically assembled in the lens mounting groove 11 of the shell 1, the lens mounting abutment 111 is a plane and provides support for the bottom of the columnar lens 2, the substrate 3 is assembled at the substrate mounting surface 15 through screws, the substrate 3 is distributed with electronic elements and plays the role of input and output of electrical signals, the photosensitive sensor 4 is attached to the upper surface of the substrate 3, the photosensitive sensor 4 is located directly below the light outlet channel 12, the photosensitive sensor 4 is located directly below the columnar lens 2 and receives the focused light signal, the light source 5 is installed in the shell 1, the light of the light source 5 enters the columnar lens 2 after reflection and is sensed by the photosensitive sensor 4. The male and female die joint line position 10 on the shell 1 is away from the assembly surface of the substrate 3 and the shell 1 and the assembly surface of the columnar lens 2 and the shell 1.

[0026] The shell 1 provided by the utility model has novel structure, the shell 1 optimizes the male and female die joint line position 10, the joint line position 10 is neither on the assembly surface of the columnar lens 2 nor on the assembly surface of the substrate 3, but increases the space above the substrate 3 and the photosensitive sensor 4, forms a non-contact surface, places the joint line position 10 on the non-contact surface, applies the optimized shell 1 to the contact image sensor, under the premise of ensuring normal installation of the columnar lens 2 and the substrate 3, lifts up the joint line position 10 relative to the substrate mounting surface 15, can ensure that the burr of the joint line position 10 of the shell 1 does not contact other components when the components are assembled, greatly reduces the probability of burr falling at the joint line position 10, and can improve the quality of the contact image sensor.

[0027] The above only describes some embodiments of the utility model, and it should be noted that, for ordinary skilled persons in the art, other deformations and improvements can be made without departing from the creative concept of the utility model, and these all belong to the protection scope of the utility model.

Claims

1. A new die line position designed housing, characterized by, The front of the shell (1) is provided with a lens mounting groove (11) for mounting a cylindrical lens (2), the back of the shell (1) is provided with a substrate mounting surface (15) for mounting a substrate (3), the groove bottom of the lens mounting groove (11) is a non-closed structure forming a light passage (12), and the upper part of the light passage (12) forms a flat lens mounting support (111), the light passage (12) is located directly above a photosensitive sensor (4) on the substrate (3), the bottom of the light passage (12) does not contact the substrate (3), the two sides of the light passage (12) are vertical planes (121), the bottom of the vertical plane (121) of the light passage (12) is a male-female mold line position (10), and the two sides below the light passage (12) are provided with inclined surfaces (131) to form a cavity (13) that is wide at the bottom and narrow at the top.

2. The novel mold line location designed enclosure of claim 1, wherein, The vertical plane (121) and the inclined surface (131) are connected by a horizontal transition surface (132), and the connection between the horizontal transition surface (132) and the vertical plane (121) forms a right angle, which is the male-female mold line position (10).

3. The novel mold line location designed enclosure of claim 2, wherein, The bottom edge of the inclined surface (131) is higher than the substrate mounting surface (15), so that an elevated area (14) is formed above the photosensitive sensor (4) on the substrate (3).

4. The novel mold line location designed enclosure of claim 3, wherein, The two sides of the elevated area (14) are provided with vertical surfaces (141) perpendicular to the substrate mounting surface (15), and the distance between the two vertical surfaces (141) is wider than the distance between the bottom edges of the two inclined surfaces (131).

5. A contact image sensor, comprising: The shell (1) includes a cylindrical lens (2) vertically arranged in the lens mounting groove (11), the lens mounting support (111) provides support for the bottom of the cylindrical lens (2), the substrate mounting surface (15) is provided with a substrate (3), the substrate (3) is provided with a photosensitive sensor (4), the photosensitive sensor (4) is located directly below the light passage (12), the male-female mold line position (10) is away from the assembly surface of the substrate (3) and the shell (1), the assembly surface of the cylindrical lens (2) and the shell (1), the shell (1) is provided with a light source (5), and the light of the light source (5) enters the cylindrical lens (2) after reflection and is sensed by the photosensitive sensor (4).

Images