TWM244612U - Electrical connector - Google Patents

Description

M244612 C7 --------- --__ D7 V. Creation Instructions (l) ------ [Creation Field] This creation is about an electrical connector, especially a connector that can be used for _ daughter card. Electrical connector for transmitting electronic signals with a circuit board. [Description of Knowing Skills] For today's portable electronic products, such as personal digital assistants (PDAs), digital cameras, or notebook computers, due to the design of light and thin market requirements, in terms of storage of electronic data, We are looking for a new type of storage medium that is small in size, low in power consumption, and can maintain the integrity of the data when no power is applied to replace the traditional magnetic storage medium, so flash 10 is used. The electronic card with main memory as the main component has become the standard equipment for storing data media on various portable electronic products. In order to achieve the electronic connection between the electronic card and the internal f-channel of the portable electronic products to transmit electronic signals, It can also replace the functional requirements of different electronic cards. Generally, an electrical connector for the power supply card is inserted on the circuit board in the electronic product, so that the electronic card can be detachably inserted into the electrical connector and communicated with it. Circuits of electronic products transmit electronic signals. As shown in the first figure, a conventional electrical connector i is described, which includes a housing U made of an insulating material. The housing u has a body ln and two fixed arms 112 spaced a certain distance and parallel to each other. One end of the arm 112 on the same side in the 20-direction is simultaneously connected to the opposite ends of the main body m, so that an insertion space is formed between the main body and the two fixed arms 112 for the insertion of an electronic card 2. The connector 1 further includes a plurality of conductive terminals 12, each conductive terminal 12 has a contact portion 121 and a soldering portion 122, so that each conductive terminal 12 is correspondingly placed and positioned on a plurality of ends provided on the body u 丨- --Page 4 This paper size applies Chinese National Standard (CNS) A4 (210X297 mm) (Please read the precautions on the back before filling this page)

Order — V. Creation instructions (2) Inside the sub slot 113, the contact # β β〇 丨 121 疋 is located in the insertion space 110, and the soldering portion 122 is protruded outside the body U1 to be used with a circuit board ( Not shown) Electrical connection. In addition, the electron +9 and the female «Dianyu 2 have a sheet-like body 20, and the bottom of the 5 20 15 body 20 is provided with a plurality of electrical contacts 2m. When the electronic card 2 and

When the electrical connection 1§ 1 is combined, Lei Zhao 9 can go, L 卞 Rabbit kcal 2 can be inserted into the insertion space 110 along the insertion direction of a parallel fixed arm 112 and guided by the two arm ⑴. After the electronic card 2 is positioned, the electrical contact 21 of the electronic card 2 can contact the contact # 121 of the conductive terminal 12 correspondingly to form an electrical connection, and thus can be electrically connected to the circuit board. However, in such a manner that the electronic card 2 and the electrical connector 1 are relatively horizontally inserted, because the relative friction distance between the electronic card 2 and the electrical connector 1 is relatively long, it is easy to make the electrical contacts 21 of the electronic card 2 and The contact portion 121 of the conductive terminal 12 is abraded, especially when the number of times of #electronic card 2 is changed, the wear situation will be worsened.-Once the electrical contact 21 of the electronic card 2 or the contact portion 121 of the conductive terminal 12 is generated, When the contact is poor, the electronic card 2 will cause an error in operation or even lose its function. [Summary of Creation] Therefore, the main purpose of this creation is to provide an electrical connector that can reduce the frictional distance with respect to the electronic card while reducing the wear while ensuring effective contact with the electronic card. Therefore, the electrical connector of this creation includes a housing, most conductive terminals, and a cover, wherein one end of the cover is pivotally connected to one side of the housing, and the cover can be pivoted to be located above the housing and the housing. The body is in contact, and the pivot end is displaceable in a first direction. Page 5 M244612 5. Creation instructions (3 5 10 15 20 The electrical connector of this creation can electrically connect a circuit board with an electronic card. The electronic card has a body, a plurality of electrical contacts provided on the body, And, a fixing groove located on one side of the body, the electrical connector includes a housing, a composite conductive terminal, and a cover. * The housing has a bottom wall, and two fixings are respectively connected to two opposite sides of the bottom wall. Arm, the shell includes a plurality of receiving grooves, and the shell defines a first direction and a second direction that is not on the same plane as the first direction. A plurality of conductive terminals are respectively received in one receiving groove. The contact portion of each conductive terminal protrudes from the bottom wall, and the soldering portion protrudes from the housing to be electrically connected to the circuit board. The cover defines an insertion space for the insertion of the electronic card, It is pivotably and slidably connected to the casing, so that the cover can be pivoted between a first position in a first direction and a second position in a second direction relative to the casing, and can be along the first direction. From the first position to a third position. When the cover is in the second position, the electrons It can be inserted into the insertion space, and the back cover is pivoted to the first position, and then moved to the third position in the first direction. The conductive terminal is in electrical contact with the electronic card. Other features and advantages will be clearly understood in the following detailed description of the preferred embodiment with reference to the drawings. In the drawings: The first picture is a connection state of a conventional electronic card and an electrical connector The second figure is a three-dimensional exploded view of a preferred embodiment of the electrical connector of this creation; (Please read the precautions on the back before filling out this page) * Order 丨 .0: Page 6 This paper size Applicable to China National Standard (CMS) A4 specification (210X297 mm) M244612 5. Creation instructions (4 5 10 15 20 The third picture is the use state diagram of the electrical connector of the second picture, and the cover is in the second position And an electronic card is inserted; the fourth picture is another use state diagram of the electric remote connection and the electric connection state of the second picture, and illustrates the situation where the cover is rotated to the first position after the electronic card is inserted; "The fifth picture is the second connector of the electrical connector— The state diagram is used to explain the situation where the cover is moved from the first position to the third position. The sixth diagram is a partial use state diagram of one of the electrical connectors of the second diagram, illustrating that the read / write control of the electronic card is located at read-only Position, so that the first electrical state of inductive continuity; & and Figure 7 is a partial use state diagram of the electrical connector of Figure 2 showing that the read / write control of the electronic card is in a writable position To make the sensing device in a second electrical state that is electrically non-conducting. [Detailed description of the preferred embodiment] The preferred embodiment of the electrical connector of the present invention is used to communicate with a circuit board (not shown in the figure). (Shown) is connected and can be inserted by an electronic card. Referring to the second figure, the electronic card 3 has a rectangular body 31, the body 31 has a first, 34, and a second side wall 36 opposite to the first side wall 34. The bottom 32 of the body 31 is provided with a plurality of electrical contacts 33. A read / write control member & read / write control 7 35 is provided on the first side wall 34 of the body 31 and can be moved between a read-only position and a writable position. When the read / write control member 35 is located at the read-only position, it can be used by an electronic product such as a pen computer or a palm-type personal digital assistant (PDA) to read the data stored in the electric card 3; and when the read / write control When the item% is in a writable position, you can read the data stored in the electronic card 3 and / or write the data into page 7. This paper size applies the Chinese national standard (⑽) A4 specification (21〇297297) Say

Order · (Please read the precautions on the back before filling in this page) M244612 C7 D7 V. Creation Instructions (5) 10 15 20 Electronic card 3 The second side wall of the X body 31 is more recessed to form a fixing groove 37 〇 电The connector 4 includes a housing 5 that can be in contact with the circuit board, most of the conductive terminals 9 installed on the housing 5 and electrically connected to the circuit board, a sensing device 6 installed on the housing, and a A cover body 7 pivotally and movably connected to the housing. The casing 5 is rectangular and includes a long-length body 50, which has a front end and a rear end. Left and right fixed arms 52, 53 are respectively extended forward from the left and right opposite ends of the body 50, The main body and the bottoms of the left and right fixing arms 52 and 53 are connected by a bottom wall 51. In this embodiment, the length of the bottom wall 51 extending forward is smaller than the length of the two fixing arms 52 and 53 extending forward. In addition, the bottom wall 51 is formed with an upper surface 511 and a lower surface 512. The bottom wall 51 is formed with a plurality of terminal grooves 513 parallel to each other from front to back, and the bottom wall 51 is in contact with the circuit board with a lower surface 512. The housing 5 has a first direction in the rear. Each of the left and right fixing arms 52 and 53 is provided with a positioning projection 54 protruding upward at the rear end, and the left outer side or the right outer side adjacent to the rear end (depending on whether the fixing arm is on the left or right) ) Each has a connecting portion. In this example, the 'connecting portion uses a long and inwardly recessed sliding contact groove 55, and a sliding direction groove 55 is provided below the sliding contact groove 55 in the same extending direction but The length is shorter than the blocking protrusion 57 of the sliding groove 55. The left and right inner side or right inner side of the front cantilever end of the left and right fixing arms 52, 53 (depending on whether the fixing arm is on the left or right) respectively have a latching portion. In this example, the latching portion is-- ^ Engine slot 56 ° (Please read the precautions on the back before filling this page)

., I I page 8 This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 5. Creation instructions (6) In this embodiment, in order to facilitate the installation of a sensing device 6 (described later) ), A groove 521 is recessed downward on the upper surface of the left fixing arm 52 along the length thereof, and a groove 501 is also recessed downward on the upper surface of the body 50 along the length of the body, and is fixed on the left The groove 521 of the arm 52 is in communication with the groove 501 5 of the main body 50. The plurality of conductive terminals 9 respectively have one of the opposite contact portions 91 and the _ welded portion 92 and the body portion 93 connected to the contact portion 91 and the welded portion by-ends, respectively, and each of the conductive terminals 9 is correspondingly provided in each of the terminal slots. In the channel 513, the main body portion 93 interferes with the wall surface of the terminal channel 513. 10. When the conductive terminal 9 is provided in each of the terminal channels 513, the contact portion elastically protrudes from the above table S5U, and the welding portion protrudes forward from the bottom wall 51 forward from the front end of the ㈣Η to communicate with The circuit board is electrically connected. The sensing device 6 includes a sensing member 61 movably installed in the groove 521 of the left fixed arm 52, an L-shaped groove 15 on one side of the groove 15 of the left fixed arm 521, and a groove 5 on the side of the body 50. A linking member 62 that can be movably brought into contact with the sensing member 6! And a pusher 63 that can be brought into movable contact with the linking member 62 in the groove 501 of the body 50. The linking member 62 is located in the groove 521 of the left arm 52 as a toggle arm 621, and is located in the groove 501 of the body 50 as a push arm 622. The toggle arm 621 is elastically in contact with the sensor 61. A cover body 7 includes a restriction wall 71 having an opposite inner wall surface 711 and an outer wall surface 712, and two left and right engaging arms 72, 74, defining an insertion space 73, which are respectively connected to the restriction wall 71 oppositely. The restriction wall 71 on the two sides and the two engagement arms 72 and 74 can be used together for the electronic card 3. The restriction wall can be detached from the restriction wall, page 9. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm). Creation instructions (7) The top edge of 5 10 15 71 is inserted downward. : Refer to the fourth figure. The bottom of the adjacent restricting wall 71 has at least one of the following. The limiting rib 713 protruding to the insertion space 73 is described in the U-limit assisting block 713 as an example. The left and right engaging arms [, there are-positioning portions 721, 741 near the top and 74: in the second right: 74: in the example, the position portion M1 A M is arc-shaped. In this implementation block 743. "The daughter card == the elasticity of the protruding protrusion of the left engaging arm 72 is limited to the insertion space. The two-way cup, the wall 36 is moved to the stopper block and the Chuanka space 73 direction, until the stopper rib 713 abuts the electric card 3 At the same time, the bottom wall 32 of the stopper 3 is locked with the 37-phase locking slot of the side wall ㈣ to limit and set the potential. See the second and third figures when the potential is equal to the bottom part. Each of the 'lunar grooves 55' which protrude toward the insertion space 73, 7221 and 7421, can be movably connected to each other. As shown in the third figure, the cover body 7 is almost upright and forms with the housing 5-a cool angle state. The direction of the time extension can be defined as-the second direction, so that the second direction and the first direction Γ = surface and-an angle exists', so the cover 7 can be in a first position in the first direction relative to the housing Pivot between _ and the first position in the second direction. As shown in the fourth figure, the cover 7 is located at the first position and the cover 7 covers the housing 5. The cover 7 is located at the second position. 7 之 二 Pivot bolt 7221 is the inferior 20 M244612 C7 D7 which is located in the opposite slot 1 of the ^ V. Creation instructions (8) 10 15 20 55 at the front end, and adjacent to the 2 The materials of the two pivot joints 722, 7421, the pivot joints 722, and M2 can be abutted by the front edge of the stopper protrusion 57 so that the two pivot joints 7221 and 7421 remain at the front end positions of the corresponding sliding grooves 55. At the same time, some materials adjacent to the outer wall surface 712 of the two pivot joints 722 and 742 also abut against the positioning protrusions 54 on the fixed arms 52 and 53 of the casing 5, so that the flip angle of the cover 7 relative to the casing 5 is restricted. So that the angle between the first direction and the second direction is maintained at a certain angle. In this example, it is slightly less than ninety degrees, and the cover 7 can be firmly leaned on the positioning protrusion 54 to facilitate the electronic card. Insertion of 3. As shown in the fifth figure, when the cover 7 is in the first position, it can move between the first position and a third position along the first direction. The positioning portions of the left and right engaging arms 72 and 74 The tops of 721 and 741 respectively form positioning pieces 7211 and 7411 which protrude opposite to each other away from the insertion space 73. When the cover 7 is moved from the first position (as shown in the fifth figure) to the second position (as the first (Fig. 6) When moving, the positioning pieces 72mm and 7411 correspondingly protrude into the latching grooves 56 of the two fixing arms 52 and 53 of the housing 5. Positioning the cover 7 on the housing 5 can prevent the cover 7 from loosening and shaking. As shown in the second and third figures, when the electrical connector 4 is actually used, 疋 firstly cover the cover 7 relative to the shell. The body 5 is pivoted to a second position in the second direction, so that the electronic card 3 is inserted into the insertion space 7 ”. The limiting rib 713 and the limiting block 743 of the cover 7 will position the electronic card 3 on the cover. Inside the body 7; then the cover 7 is pivoted from the second position in the second direction to the first position in the first direction, at this time, the electrical contact 33 of the electronic card 3 has not The contact portions 91 of the point terminals 9 are in contact with each other. As shown in the fifth figure, the cover 7 is then moved from the first position along the first side on page 11. This paper applies the Chinese National Standard (CNS) A4 specification (210X297). (Please read the precautions on the back first. (Fill in this page) Order—Refer to-5 10 15 20 V. Creative Instructions (9) Corresponding to the contact point of the lead terminal 9 Electrical: Electrical contact 33 means simultaneous positioning piece 72η, 7411 pair: eye contact forms electricity During connection training, to limit the size of the fixed arm 52 of the cover 5 = refer to the sixth and seventh figures at the same time. When the cover with the electronic card 3 is inserted: when the contact 63 is 2 ^, the pushing arm of the link 62 622 elastically pushes and pushes the electronic card 3 piece 63 elastically against the bottom 32 of the electronic card 3, so the contact part 2 ==〗 Unfair connection 'At the same time, the link 62 is in contact with the electronic writing piece 35, and Make # 电 二 == — when reading the position, the toggle arm 6: 1 puts on the 6 L write control member 35 to push against the sensor 61, so that sensor 22: the first electrical state of electrical continuity , The user can read the data stored in the electronic card by the electronic money electronic card in a read-only state. When setting, read / write ^ :: 1/5 is relatively open to the toggle arm 621 of the linkage 62, so that the toggle arm: W is relatively far away and does not touch the sensing member 61, so that the sensing device 6 is electrically non-conductive In the second electrical state, the user can learn that the electronic card is in a writable state, and can directly read and / or modify the data stored in the electronic card. As shown in the second and third figures, the electrical connector 4 further includes at least a mouth: 8 'In this example, two are respectively inserted under the front ends of the corresponding left and right fixing arms 52 and 53 to approach the circuit board. The fixing part 8 is used as an explanation, so that the fixing part ^ is welded to the circuit board, and the reading body 5 is borrowed—in addition, the fixing part 8 can be made of metal and connected to the ground circuit of the circuit board, and the cover 12 Page M244612 V. Creation instructions (10) 5 10 15 20 The body 7 of the 7-bit positions 721 and 741 are respectively provided with an elastic contact portion 721 = 7412 'so that when the electronic card 3 is inserted and positioned, and the cover body 7 When positioned in the third position, the two elastic contact portions 7212 and 7412 will be in electrical contact with the firmware 8 correspondingly, so that the cover body 7 is thereby grounded and the electromagnetic wave effect generated during the operation of the electronic card 3 is eliminated. There are many types and types. This example only uses a metal sheet with an L-shaped cross section ^, so I wo n’t go into details here. In this case, the reading arm 621 for the linkage 62 will protrude from the first side wall 34 'of the casing 5 == In order to prevent the electronic card 3 from flipping from the second position to the first position with the cover 7, the toggle arm will block Who has entered the electronic card 3? Xia Λ and body 5-between the fixed arms 52 and 53, on the position close to the pivot joint 722-there is a push-out block 75 protruding away from the inner surface Push in the cover 7 by the second place! Γ5 can first push the toggle arm 621 outwards, so that the electrician fixes the arm 52, 53, and the cover 7 moves to the third position: r21 is detached, so that the dial ^ is summed up above The connector 4 is powered by the cover body 7 after the π position, and then the cover body 7 is rotated relative to the housing 5 by an angle to connect the body, and then the horizontal movement is used to drive the electronic card 3 to the housing 5 to be large. Electrically connect these conductive terminals 9 correctly, so that the electrical contact between the contact portion 91 and the electronic card 3: The accompaniment 1 'not only keeps rubbing against each other to scrape off surface dirt, but the electrical properties are purely external. What's more, is to reduce the occurrence of storage loss on page 13. M244612 C7 D7 V. Creation instructions (11 probability can improve the situation where the friction distance between the electrical contact of the electronic card and the conductive terminal of the electrical connector is too long. The above are only the preferred embodiments of the creation. When the scope of the implementation of the creation cannot be limited by this, that is, the simple equivalent changes and modifications made according to the scope of the patent application for the creation and the content of the creation instruction, Should still fall within the scope of this creation patent. (Please read the note on the back first Please fill in this page again), Yiding 丨 page 14 This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) M244612 C7 D7 V. Creation instructions (12) [Comparison of component numbers] 1 Electrical connector 501 Groove 11 Housing 51 Bottom wall 110 Inserting space 511 Upper surface 111 Body 5 12 Bottom surface 112 Fixing arm 513 Terminal channel 113 Terminal slot 52 Left fixing arm 12 Conductive terminal 521 Groove 121 Contact part 53 Right fixing arm 122 Welding Portion 54 Positioning projection 2 Electronic card 55 Sliding slot 20 Body 56 Card slot 21 Electrical contact 57 Blocking projection 3 Electronic card 6 Sensing device 3 1 Body 61 Sensing member 32 Bottom 62 Linking member 33 Electrical contact 621 toggle arm 34 first side wall 622 push arm 35 read / write control 63 push contact 36 second side wall 7 cover 37 locking groove 71 restricting wall 4 electrical connector 711 inner wall surface 5 housing 712 outer wall surface 50 body 713 Limit ribs page 15 Chinese National Standard (CNS) A4 size (210X297 mm) (Please read the back of the precautions to fill out this page)

M244612 C7 D7 V. Creative Instructions 3 () 72 Left engaging arm 7412 Elastic contact portion 721 Positioning portion 742 Pole connection portion 7211 Positioning piece 7421 Frame connection bolt 7212 Elastic contact portion 743 Limiting block 722 Pole connection portion 75 Pushing portion 722 1 Area connector 8 Fixing piece 73 Insert space 9 Conductive terminal 74 Right engaging arm 91 Contact portion 741 Positioning portion 92 Welding portion 7411 Positioning piece (Please read the precautions on the back before filling this page)

可 I page 16 This paper size is applicable to China National Standard (CNS) A4 (210X297 mm)

Claims (1)

M244612 η ABCD 6 1 · 0 15 20 5912076 Penalty Patent Application Amendment to Patent Scope (Revision Date: 93.07) An electrical connector, by which a circuit board is electrically connected to an electronic card. The electronic card has a main body, a plurality of electrical contacts provided on the main body, and a fixing groove provided on one side of the main body. The electrical connector includes: a housing having a bottom wall, and two A fixed arm connected to two opposite sides of the bottom wall, the casing includes a plurality of receiving grooves penetrating through the casing, the casing defines a first direction, and a second one that is not on the same plane as the first direction of 4. In the direction, one of the shells has a connection portion and a card portion that are opposite to each other. The connection portions each have a long sliding groove, and the latch portions each have a phase. A recessed latching groove of the connecting portion; a plurality of conductive 'child's each having a contact portion and a soldering portion; each of the conductive terminals is respectively disposed in a receiving slot, and the contact portion of each conductive terminal protrudes from the bottom; 'On the surface of the wall' and the welds are convex It is in electrical contact with the circuit board outside the casing, and a cover which is pivotably and slidably connected to the casing. The cover has a restricting wall and two opposite sides respectively connected to the restricting wall. The engaging wall defines an insertion space in which the electronic card can be inserted, and the two engaging arms of the cover respectively have an opposite positioning portion and a pivoting portion, and the pivoting portions each have An outwardly protruding pivot bolt is pivotally connected to the sliding grooves correspondingly, so that the cover body can be relatively M244612 iyf]; / ^ Pi VI. The scope of the patent application is pivoted in a first position in one of the first directions and a second position in one of the second directions, and the positioning portions each have a positioning piece. When the cover is moved from the first position to a third position in the first direction, the positioning pieces are respectively inserted into the latch grooves to limit the position of the cover relative to the housing. In the third position; when the cover is in the second position, the electronic card can be inserted into the insertion space, the cover is pivoted to the first position and along with the electronic card in the first direction When moving to the third position 10, the conductive terminals are in electrical contact with the electronic card. 2. The electrical connector according to item 1 of the scope of patent application, wherein the electrical connector further includes at least one fixing member, and the housing can be connected and fixed to the circuit board correspondingly. 3 · The electrical connector as described in item 2 of the scope of patent application, wherein 15 the fixing member is electrically connected to the ground circuit of the circuit board, and the positioning portion of the cover body is correspondingly provided with an elastic contact portion. When the cover is in the third position, the elastic contact portion is in electrical contact with the fixing member correspondingly, so that the cover is shaped and grounded. 4 · The electrical connector as described in item 1 of the scope of patent application, wherein one of the engaging arms of the cover is a restricting block having a protrusion protruding to the other engaging arm to allow the electronic card to be inserted in the When inserting the space, push the restricting block away from the inserting space in a tight pressing manner, and when the electronic card is inserted into a certain distance, the restricting block can be in contact with the second side wall of the electronic card. The dimensions of this paper are in accordance with Chinese National Standard (CNS) A4 (HflCR tribute 97 mm) M244612 July / b Xiu Ren / Geng 880-8 ABCD 々, patent application scope latch to limit and fix the electronic When the card is inserted into the insertion space, the card is positioned relative to the cover. 5. The electrical connector according to item 1 of the scope of the patent application, wherein the limiting wall of the cover further includes at least one limiting rib protruding to the insertion space, and the limiting rib can limit the electronics. When the card is inserted into the insertion space, the card is positioned relative to the cover. 6. The electrical connector according to item 1 of the scope of the patent application, wherein the connecting portions of the housing further have a positioning projection and a stop projection, respectively, and the positioning projection and the stop projection The part can limit the angle between the cover body and the housing when it pivots, so that when the cover body is in the second position, the angle between the first direction and the second direction is less than a predetermined value. 7. The electrical connector according to item 1 or 6 of the scope of the patent application, wherein the connecting portions of the housing further have a positioning projection 15 and a stop projection, respectively, and the positioning projections and the The blocking protrusion can limit the included angle when the cover is pivoted relative to the casing, so that when the cover is in the second position, the included angle between the first direction and the second direction is less than ninety degrees. 8. The electrical connector according to item 1 of the scope of patent application, wherein the electrical connector further comprises a sensing device, the sensing device has a sensing element and a linking element that is interlocked with the sensing element, and A read / write control member is provided on one side wall of the electronic card. When the cover is moved from the first position to the third position in the first direction, the electronic card is provided with the read / write control member. The dimensions of the paper on one side wall are in accordance with the Chinese National Standard (CNS) A4 specification lg 97 mm) M244612 Xu Fyue 'Supplement 8 8 9) ° ABCD t, the scope of patent application can compress and move the link, and then the link and The read / write control element abuts, and when the read / write control element is in a read-only position, the linkage element abuts the sensing element, and when the read / write control element is in a writable position, the The interlocking members are 5 pairs away from the sensing member. This paper size applies to China National Standard (CNS) A4 size 2ftl297mm