CN106657710B

CN106657710B - Frame assembly and contact type image sensor with same

Info

Publication number: CN106657710B
Application number: CN201611107806.6A
Authority: CN
Inventors: 丁青; 鞠丽会
Original assignee: Weihai Hualing Opto Electronics Co Ltd
Current assignee: Weihai Hualing Opto Electronics Co Ltd
Priority date: 2016-12-05
Filing date: 2016-12-05
Publication date: 2023-10-10
Anticipated expiration: 2036-12-05
Also published as: CN106657710A

Abstract

The application provides a frame assembly and a contact type image sensor with the same, wherein the frame assembly comprises a plurality of frame structures, and the frame structures are sequentially arranged along the length direction of the frame structures to be spliced to form the frame assembly. The application solves the problem of too small scanning width of the contact image sensor in the prior art.

Description

Frame assembly and contact type image sensor with same

Technical Field

The application relates to the field of contact type image sensors, in particular to a frame assembly and a contact type image sensor with the same.

Background

The contact image sensor (Contact Image Sensor), i.e. CIS, is used in a scanner, which closely arranges photosensitive units, directly collects light information reflected by scanned manuscripts, the contact image sensor is widely used because of its low cost and the characteristics of being convenient for manufacturing a compact scanner.

However, the existing contact image sensor has a limited scanning width, which cannot be used for scanning a document to be scanned having a relatively wide width, and furthermore, the existing contact image sensor has only one type of scanning width, which cannot be adjusted, therefore, the contact image sensor cannot be used for adaptively scanning various manuscripts with different widths, so that the existing contact image sensor has poor practicability and certain use limitation.

Disclosure of Invention

The application mainly aims to provide a frame assembly and a contact image sensor with the same, so as to solve the problem that the scanning width of the contact image sensor in the prior art is too small.

In order to achieve the above object, according to one aspect of the present application, there is provided a frame assembly including a plurality of frame structures, which are sequentially arranged along a length direction of the frame structures to be spliced to form the frame assembly.

Further, the frame structure comprises two frame sub-structures, the two frame body substructures are arranged in parallel along the width direction of the frame body structure, and the first ends of the two frame body substructures are respectively positioned at two ends of the frame body structure in the length direction.

Further, the frame structure has a light-transmitting gap, and two frame sub-structures of the frame structure are arranged at intervals to form the light-transmitting gap.

Further, the frame body substructure comprises a mounting part and a supporting part which are connected, wherein the mounting part is provided with a connecting mounting hole and/or a connecting mounting notch, and the top end of the supporting part is provided with a supporting surface for supporting the light source structure.

Further, the frame substructure further includes stop flanges disposed on the support surface and located at both ends of the frame substructure in the width direction.

Further, the frame body substructure includes a first connection structure and a second connection structure, the first connection structure is disposed on an end face of the first end of the frame body substructure, the second connection structure is disposed on an end face of the second end of the frame body substructure, and two adjacent frame body substructures along a length direction of the frame body structure are connected through the first connection structure on one frame body substructure and the second connection structure on the other frame body substructure.

Further, the first connection structure is a clamping protrusion, and the second connection structure is a clamping notch or a clamping groove matched with the clamping protrusion.

According to the application A kind of electronic device on the other hand, in the other hand, there is provided a contact image sensor including: a substrate; a frame assembly detachably disposed on the substrate, a light transmission space communicated with the light transmission gap of the frame body assembly is formed between the substrate and the frame body assembly, and the frame body assembly is the frame body assembly; the light source structure is used for emitting light and is arranged on the supporting surface of the frame body component; a light-sensitive part, the photosensitive part is arranged on the substrate and positioned in the light transmission space to receive the light emitted by the light source structure and reflected by the manuscript to be scanned.

Further, the contact image sensor further comprises a supporting base frame, the supporting base frame comprises a supporting plate and supporting legs arranged at two ends of the supporting plate, the supporting plate is provided with a top supporting plane, one end of each supporting leg protrudes out of the top supporting plane to form an installation space with the top supporting plane, and the substrate is embedded in the installation space.

Further, the contact image sensor further comprises two end cover structures, and the two end cover structures are detachably arranged at two ends of the frame body component in the length direction respectively.

Further, the contact image sensor further comprises a lens structure arranged at the light transmission gap.

Further, the contact image sensor further comprises a first sealing and shading part, wherein the first sealing and shading part is arranged at the joint of the end cover structure and the frame body component and/or between two adjacent frame body structures of the frame body component.

Further, the contact image sensor further comprises a second sealing shading part, and the second sealing shading part is arranged at a light transmission gap between the lens structure and the frame body component.

By applying the technical scheme of the application, as the frame assembly comprises a plurality of frame structures, the frame structures are sequentially arranged along the length direction of the frame structures to be spliced to form the frame assembly. Like this, through selecting a plurality of framework structures to splice the length that the assembly formed can be increased effectively, not only can guarantee the frame subassembly to the support strength of contact image sensor's other structural component, but also effectively increased contact image sensor's scanning width, improved contact image sensor's practicality, and avoided because of the too high and too big scheduling problem of the processing difficulty of the processing cost that the frame subassembly of integration processing length overlength caused.

In addition, the whole length of the frame body assembly formed by assembling can be reliably controlled by selecting frame body structures with different lengths and different numbers, so that the contact type image sensor product with the scanning width meeting the requirements of customers can be processed and manufactured more conveniently, and the market competitiveness of the contact type image sensor is further improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 shows a schematic diagram of a contact image sensor according to an alternative embodiment of the application;

FIG. 2 shows a schematic top view of the frame assembly and end cap structure of the contact image sensor of FIG. 1 assembled;

FIG. 3 is a schematic front view of a frame sub-structure of the frame assembly of FIG. 2;

FIG. 4 shows a schematic left-hand view of the frame sub-structure of FIG. 3;

FIG. 5 shows a schematic top view of the frame substructure of FIG. 3;

FIG. 6 shows the block in FIG. 3 a schematic bottom view of the body substructure;

FIG. 7 is a schematic view showing a state of a front view of two frame sub-structures adjacent in a length direction of the frame structure of the frame assembly of FIG. 2, before assembly;

FIG. 8 is a schematic view showing a bottom view of the two frame sub-structures of FIG. 7 prior to assembly;

fig. 9 is a schematic view showing a state in which two frame sub-structures in fig. 7 are assembled and provided with a first sealing light shielding portion;

fig. 10 is a schematic view showing a state in which two frame sub-structures in fig. 8 are assembled and provided with a first sealing light shielding portion;

fig. 11 is a schematic view showing a structure of a supporting base frame of the contact image sensor of fig. 1;

FIG. 12 shows a schematic front view of the end cap structure of FIG. 1;

FIG. 13 shows a schematic left-hand view of the end cap structure of FIG. 12;

fig. 14 shows a schematic top view of the end cap structure of fig. 12.

Wherein the above figures include the following reference numerals:

1. a substrate; 2. a frame assembly; 3. a light source structure; 4. a photosensitive part; 5. a supporting base frame; 51. a support plate; 52. support a leg; 53. a top support plane; 54. an installation space; 6. an end cap structure; 61. an end cap body; 62. a bump structure; 63. a groove structure; 64. a block; 65. a fitting hole; 66. a positioning part; 67. a connection part; 7. a lens structure; 8. a first sealing light shielding portion; 9. a first fastener; 10. a frame structure; 11. frame body a structure; 111. a mounting part; 112. a support part; 113. connecting the mounting notch; 114. a support surface; 115. a stop flange; 116. first connection a structure; 117. a second connection structure; 118. a first positioning mounting hole; 119. a second positioning mounting hole; 12. a light transmission gap; 13. a light-transmitting space; 14. and a limit protrusion.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, it will be apparent that the described embodiments are only some, but not all, embodiments of the application. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present application, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present application.

In order to solve the problem of too small scanning width of the contact image sensor in the prior art, the application provides a frame assembly and the contact image sensor with the same, as shown in figure 1, the contact image sensor includes a substrate 1, the above-described frame assembly 2, a light source structure 3 for emitting light, and a photosensitive portion 4, the frame assembly 2 being detachably provided on the substrate 1, and a light-transmitting space 13 communicating with the light-transmitting gap 12 of the frame assembly 2 is enclosed between the substrate 1 and the frame assembly 2, the light source structure 3 is disposed on the supporting surface 114 of the frame assembly 2, and the light-sensing portion 4 is disposed on the substrate 1 and is located in the light-transmitting space 13 to receive light emitted by the light source structure 3 and reflected by the manuscript to be scanned, wherein the frame assembly 2 is the frame assembly 2 described below.

The manuscript to be scanned in the application comprises cloth, a circuit board, leather, map or whole paper currency which is not cut, and the like.

As shown in fig. 1 and 2, the frame assembly 2 includes a plurality of frame structures 10, a plurality of frame structures 10 are along the length of the frame structures 10 the directions are arranged in sequence to be spliced to form the frame assembly 2.

Since the frame assembly 2 includes a plurality of frame structures 10, the plurality of frame structures 10 are sequentially arranged along the length direction of the frame structures 10 to be spliced to form the frame assembly 2. Like this, through selecting a plurality of framework structures 10 to splice the assembly and can increase the length of the framework subassembly 2 that the assembly formed effectively, not only can guarantee the support strength of framework subassembly 2 to other structural component of contact image sensor, but also still increase contact image sensor's scanning width effectively, improved contact image sensor's practicality, and avoided the processing cost that causes because of the long framework subassembly of integration processing length too high and the too big scheduling problem of processing degree of difficulty.

In addition, the overall length of the frame assembly formed by assembling can be reliably controlled by selecting different lengths and different numbers of frame structures 10 for splicing and assembling, so that the processing and manufacturing of the contact type image sensor product with the scanning width meeting the requirements of customers are facilitated, and the market competitiveness of the contact type image sensor is further improved.

As shown in fig. 1 and 2, the frame structure 10 includes two frame sub-structures 11, the two frame sub-structures 11 are arranged in parallel along the width direction of the frame structure 10, and first ends of the two frame sub-structures 11 are located at two ends of the frame structure 10 in the length direction. Thus, the two frame body substructures 11 are spliced to form the frame body structure 10, so that the whole frame body assembly 2 is composed of the frame body substructures 11 with the same structure, batch production of the frame body substructures 11 is facilitated, and the overall cost of the contact type image sensor is reduced.

Preferably, the frame body sub-structure 11 of the present application has three lengths, namely, A3 length 335mm, a4 length 223mm and A5 length 168mm, and similarly, the lengths of the frame body structures 10 formed by splicing two frame body sub-structures 11 in parallel are also A3 length 335mm, a4 length 223mm and A5 length 168mm. Thus, the lengths of the alternative frame assembly 2 (corresponding to the scan width of the contact image sensor) formed by the combination of the three different length frame structures 10 described above are shown in table 1 below.

Table 1 table of the relationship between the length of the frame assembly and the frame structure

Of frame construction zxfoom mode for carrying out the application mode for carrying out the application	Length of frame assembly
		A5 and A4 combination	391mm
A4 and A4 combination	446mm
		A5 and A3 combination	503mm
A4 and A3 combination	558mm
		A3 and A3 combination	670mm
4A 4 combinations	892mm
		3A 3 combinations	1005mm
6A 3 combinations	2010mm

Of course, the length of the frame structure 10 is not limited to the above three types, and the combination of the frame structure 10 is not limited to the combination shown in table 1.

As shown in fig. 1 and 2, the frame structure 10 has a light-transmitting gap 12, and two frame sub-structures 11 of the frame structure 10 are spaced apart to form the light-transmitting gap 12. Thus, the light reflected by the manuscript to be scanned enters the interior of the contact image sensor through the light transmission gap 12, so that the interior of the contact image sensor can reliably identify the information on the manuscript to be scanned.

As shown in fig. 1 and 2, the contact image sensor further comprises a lens structure 7, the lens structure 7 being arranged at the light-transmitting gap 12. In this way, the lens structure 7 plays a role in converging light rays emitted by the manuscript to be scanned, so that the contact image sensor can accurately acquire signal information of the light rays, and further scanning accuracy of the manuscript to be scanned is improved.

As shown in fig. 1 and 11, the contact image sensor further includes a support base frame 5, the support base frame 5 includes a support plate 51 and support legs 52 disposed at two ends of the support plate 51, the support plate 51 has a top support plane 53, one end of the support leg 52 protrudes from the top support plane 53 to form a mounting space 54 with the top support plane 53, and the substrate 1 is embedded in the mounting space 54.

As shown in fig. 1, the base plate 1 is provided with a limit projection 14, and in order to improve the stability of the installation of the photosensitive portion 4 on the base plate 1, the photosensitive portion 4 is disposed on the base plate 1 and located at one side of the limit projection 14 in the installation space 54.

Alternatively, the substrates 1 are all disposed along the length direction of the frame assembly 2, and the substrates 1 are integrally molded.

The integrally formed base plate 1 is fixed on the supporting base frame 5 by screws, the high overall flatness of the whole contact image sensor under the influence of gravity or external force is ensured, and the bending deformation of the contact image sensor is avoided.

The photosensitive portion 4 includes a sensor substrate and a photosensitive chip mounted on the sensor substrate, and the sensor substrate and the photosensitive chip are disposed in a direction along the longitudinal direction of the housing assembly 2.

As shown in fig. 3 to 10, the frame body sub-structure 11 includes a first connection structure 116 and a second connection structure 117, the first connection structure 116 is provided on an end face of a first end of the frame body sub-structure 11, the second connection structure 117 is provided on an end face of a second end of the frame body sub-structure 11, and adjacent two frame body sub-structures 11 along a length direction of the frame body structure 10 are connected by the first connection structure 116 on one frame body sub-structure 11 and the second connection structure 117 on the other frame body sub-structure 11. In this way, the cooperation of the first connection structure 116 and the second connection structure 117 plays a role in foolproof and limiting for the plurality of frame sub-structures 11 assembled along the length direction of the frame structure 10, so that the plurality of frame sub-structures 11 are stably spliced to form the frame assembly 2, and the structural rationality of the frame assembly 2 is ensured.

In an embodiment of the present application, as shown in fig. 8, the first connection structure 116 is a clamping protrusion, and the second connection structure 117 is a clamping notch or a clamping groove adapted to the clamping protrusion.

Optionally, the frame body substructure 11 is further provided with a first positioning and mounting hole 118 and a second positioning and mounting hole 119, where the first positioning and mounting hole 118 is used to connect with the end cover structure 6, and the second positioning and mounting hole 119 is used to mount the light source structure 3.

As shown in fig. 1, 12, 13 and 14, the contact image sensor further includes two end cover structures 6, and the two end cover structures 6 are detachably disposed at two ends of the frame assembly 2 in the length direction. In this way, the end cap structure 6 serves to reliably support and protect the frame assembly 2.

Specifically, in the present embodiment, when the first connection structure 116 of the frame sub-structure 11 is a clamping protrusion, the second connection structure 117 is a clamping notch or a clamping groove adapted to the clamping protrusion. The end cover structure 6 comprises an end cover body 61, a groove structure 63 matched with the clamping protrusion and a protrusion structure 62 matched with the clamping groove are arranged on the end cover body 61, an assembly hole 65 matched with the first positioning mounting hole 118 is further formed in the end cover body 61, a blocking block 64 for blocking the light transmission gap 12 on two sides of the frame body assembly 2 in the length direction is further arranged on the end cover body 61, and a positioning portion 66 and a connecting portion 67 connected with an external structure are further arranged on the end cover body 61.

As shown in fig. 9 and 10, the contact image sensor further includes a first sealing and light shielding portion 8, where the first sealing and light shielding portion 8 is disposed at a connection between the end cover structure 6 and the frame assembly 2 and/or where the first sealing and light shielding portion 8 is disposed between two adjacent frame structures 10 of the frame assembly 2. The first sealed shading part 8 plays a role in dust prevention and sealing of the joint of two adjacent frame structures 10, and similarly, the joint of the end cover structure 6 and the frame assembly 2 also has good dust prevention and sealing performance, so that dust is prevented from entering the installation space 54 to shade the photosensitive chip on the sensor substrate, the data acquisition of the photosensitive chip on the signal information of light is prevented from being influenced by the dust, and the working reliability of the contact image sensor is improved.

Alternatively, the first sealing light shielding portion 8 is a black resin paste.

Optionally, the contact image sensor further comprises a second sealed light shielding portion arranged at the light transmission gap 12 between the lens structure 7 and the frame assembly 2. In this way, the second sealed shading part fills the space between the lens structure 7 and the frame structure 10, so that dust is prevented from entering the light transmission gap 12 to affect the working performance of the contact image sensor, and meanwhile, the second sealed shading part can also prevent external light from entering the contact image sensor through the space between the lens structure 7 and the frame structure 10, so that the scanning reliability of the contact image sensor is ensured.

Optionally, the second sealing light shielding part is UV glue, and the lens structure 7 is adhered at the light-transmitting gap 12 through the UV glue.

As shown in fig. 3 to 6, the frame sub-structure 11 includes a mounting portion 111 and a supporting portion 112 that are connected, a connection mounting hole and/or a connection mounting notch 113 is formed in the mounting portion 111, and a supporting surface 114 for supporting the light source structure 3 is formed at a top end of the supporting portion 112. In this way, the first fastening member 9 is fastened to the connection mounting notch 113, so that the frame sub-structure 11 can be stably fixed to the base plate 1, thereby ensuring the assembly stability between the frame assembly 2 and the base plate 1.

As shown in fig. 3, 4, 5, 7 and 9, the frame sub-structure 11 further includes stopper flanges 115, and the stopper flanges 115 are disposed on the support surface 114 at both ends in the width direction of the frame sub-structure 11. In this way, the stop flange 115 serves as a stop for the light source structure 3 on the support surface 114, preventing the light source structure 3 from being detached from the support surface 114.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A contact image sensor, comprising:

a substrate (1);

the frame body assembly (2), the frame body assembly (2) is detachably arranged on the base plate (1), a light transmission space (13) communicated with a light transmission gap (12) of the frame body assembly (2) is formed between the base plate (1) and the frame body assembly (2), the frame body assembly (2) comprises a plurality of frame body structures (10), and the plurality of frame body structures (10) are sequentially arranged along the length direction of the frame body structures (10) to be spliced into a row to form the frame body assembly (2);

a light source structure (3) for emitting light, the light source structure (3) being arranged on a support surface (114) of the frame assembly (2);

the photosensitive part (4) is arranged on the substrate (1) and positioned in the light transmission space (13) so as to receive the light rays emitted by the light source structure (3) and reflected by the manuscript to be scanned;

the frame body structure (10) comprises two frame body sub-structures (11), the two frame body sub-structures (11) are arranged in parallel along the width direction of the frame body structure (10), and first ends of the two frame body sub-structures (11) are respectively located at two ends of the length direction of the frame body structure (10).

2. The contact image sensor according to claim 1, wherein the frame structure (10) has a light transmission gap (12), the two frame sub-structures (11) of the frame structure (10) being arranged at a distance to form the light transmission gap (12).

3. The contact image sensor according to claim 1, wherein the frame body substructure (11) comprises a mounting portion (111) and a supporting portion (112) which are connected, the mounting portion (111) is provided with a connection mounting hole and/or a connection mounting notch (113), and a top end of the supporting portion (112) is provided with a supporting surface (114) for supporting the light source structure (3).

4. A contact image sensor according to claim 3, wherein the frame sub-structure (11) further comprises stop flanges (115), the stop flanges (115) being arranged on the support surface (114) at both ends in the width direction of the frame sub-structure (11).

5. The contact image sensor according to claim 1, wherein the frame sub-structures (11) comprise a first connection structure (116) and a second connection structure (117), the first connection structure (116) being provided on an end face of a first end of the frame sub-structures (11), the second connection structure (117) being provided on an end face of a second end of the frame sub-structures (11), adjacent two frame sub-structures (11) along a length direction of the frame structure (10) being connected by the first connection structure (116) on one of the frame sub-structures (11) and the second connection structure (117) on the other frame sub-structure (11).

6. The contact image sensor of claim 5, wherein the first connection structure (116) is a clamping protrusion, and the second connection structure (117) is a clamping notch or a clamping groove adapted to the clamping protrusion.

7. The contact image sensor according to claim 1, further comprising a support base frame (5), wherein the support base frame (5) comprises a support plate (51) and support legs (52) arranged at two ends of the support plate (51), the support plate (51) is provided with a top support plane (53), one end of the support legs (52) protrudes out of the top support plane (53) to form a mounting space (54) with the top support plane (53), and the substrate (1) is embedded in the mounting space (54).

8. The contact image sensor according to claim 1, further comprising end cap structures (6), the number of the end cap structures (6) being two, the two end cap structures (6) being detachably provided at both ends in the longitudinal direction of the frame assembly (2), respectively.

9. The contact image sensor according to claim 1, characterized in that the contact image sensor further comprises a lens structure (7), the lens structure (7) being arranged at the light-transmitting gap (12).

10. The contact image sensor according to claim 8, further comprising a first sealed light shielding portion (8), the first sealed light shielding portion (8) being arranged at a junction of the end cap structure (6) and the frame assembly (2) and/or the first sealed light shielding portion (8) being arranged between two adjacent frame structures (10) of the frame assembly (2).

11. The contact image sensor according to claim 9, further comprising a second sealed light shielding portion arranged at the light transmission gap (12) between the lens structure (7) and the frame assembly (2).