Rack for control system

Abstract

The utility model discloses a rack for a control system, and relates to the technical field of integrated control. According to the main technical scheme, the circuit board comprises a main body, a cover plate and a clamping base, one end of the main body is provided with an installation groove, a circuit printed board bottom plate is installed in the installation groove, and a socket is arranged on the side, close to an opening of the installation groove, of the circuit printed board bottom plate and used for being connected with one end of a circuit printed board card; the cover plate is connected to the main body; the clamping seat is arranged on the side, close to the circuit printing plate bottom plate, of the cover plate, and a clamping groove is formed in the side, away from the cover plate, of the clamping seat. Wherein the clamping groove corresponds to the socket, and the clamping groove is used for being connected with the other end of the circuit printed board card. The purposes of remarkably improving the stability of the circuit printed board card after installation and reducing the risk of loosening or falling off caused by vibration or external force are achieved. And meanwhile, the clamping groove on the clamping seat is clamped with the circuit printed board card, so that the convenience of installation and subsequent maintenance of the circuit printed board card is effectively ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of integrated control technology, specifically relates to a control system is with frame. BACKGROUND

[0002] The board card is a kind of printed circuit board, PCB board for short, with plug core when making, can be inserted into the slot of the main circuit board (mainboard) of computer, to control the running of hardware, such as display, acquisition card and other equipment, after installing driver, corresponding hardware function can be realized.

[0003] The prior art discloses a splicing type board card controller, including shell;The upper end of the shell is provided with detachably connected upper cover plate, the circuit printed board bottom plate on the inner side bottom of the shell is provided with a plurality of sockets, the socket is used to connect with the circuit printed board card;The side wall of the shell is also provided with connector mounting plate, the connector mounting plate is provided with a plurality of connectors for realizing internal and external cable communication;The inner side wall of the shell is provided with a plurality of guide rails, the guide rail is slidably connected with the side wall of the circuit printed board card, the guide rail is arranged along the direction perpendicular to the circuit printed board bottom plate;The guide rail includes two parallel sliding strips, the two sliding strips are slidably connected with the side wall of the circuit printed board card.

[0004] However, in actual operation, the end of the circuit printed board card away from the socket is not effectively connected between the upper cover plate, which greatly reduces the stability of the circuit printed board card. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a control system is with frame, solve the problem that the end of circuit printed board card away from socket in prior art splicing type board card controller is not effectively connected between upper cover plate, which greatly reduces the stability of circuit printed board card.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] A control system is with frame, including main body, cover plate and clamping seat, the one end of the main body is provided with installation slot, the installation slot is installed with circuit printed board bottom plate, the circuit printed board bottom plate is provided with socket near the one side of installation slot, the socket is used for connecting with one end of circuit printed board card;The cover plate is connected to the main body;The clamping seat is arranged on the side of the cover plate close to the circuit printed board bottom plate, and the clamping seat is provided with clamping groove on the side away from the cover plate;Wherein, the clamping groove corresponds to the socket, and the clamping groove is used to connect with the other end of the circuit printed board card.

[0008] Further technical solutions are: the elastic sheet is arranged in the clamping groove; the elastic sheet extends from the bottom of the clamping groove to the opening of the clamping groove; a movement gap is arranged between the elastic sheet and the wall of the clamping groove; the movement gap is used for reserving the movement space of the elastic sheet to the wall of the clamping groove; the side of the elastic sheet away from the movement gap is used for abutting against the side wall of the circuit board.

[0009] Further technical solutions are: the elastic sheet comprises a connecting section; the connecting section is connected to the bottom or the wall of the clamping groove; the connecting section gradually moves away from the wall of the clamping groove from the bottom of the clamping groove to the opening of the clamping groove; and the end of the connecting section close to the opening of the clamping groove is used for abutting against the side wall of the circuit board.

[0010] Further technical solutions are: the elastic sheet further comprises an abutting section; the abutting section is connected to the end of the connecting section close to the opening of the clamping groove; the abutting section extends from the bottom of the clamping groove to the opening of the clamping groove; the middle part of the abutting section is curved into an arc structure away from the wall of the clamping groove; and the side of the abutting section away from the wall of the clamping groove is used for abutting against the side wall of the circuit board.

[0011] Further technical solutions are: the elastic sheet further comprises a first guide section; the first guide section is connected to the end of the abutting section away from the connecting section; the first guide section gradually moves close to the wall of the clamping groove from the bottom of the clamping groove to the opening of the clamping groove; and the first guide section is used for guiding the circuit board into the abutting section.

[0012] Further technical solutions are: the elastic sheet further comprises a second guide section; the second guide section is connected to the end of the first guide section close to the opening of the clamping groove; the second guide section extends from the bottom of the clamping groove to the opening of the clamping groove; the middle part of the second guide section is curved into an arc structure away from the wall of the clamping groove; and the second guide section is used for guiding the circuit board into the first guide section.

[0013] Further technical solutions are: the number of the elastic sheets is several; and the several elastic sheets are uniformly arranged along one end of the clamping groove to the other end of the clamping groove.

[0014] Further technical solutions are: the rack further comprises a guide plate; the guide plate is arranged on the wall of the clamping groove; and the guide plate is arranged between any two adjacent elastic sheets.

[0015] Compared with the prior art, the utility model has the advantages of:

[0016] One end of the circuit printed board card can be fixed in the socket, and the other end of the circuit printed board card can be fixed in the clamping groove of the clamping seat. Thus, the stability of the circuit printed board card after installation is significantly improved, and the risk of loosening or falling caused by vibration or external force is reduced. At the same time, the clamping mode between the clamping groove on the clamping seat and the circuit printed board card effectively ensures the convenience of installation and subsequent maintenance of the circuit printed board card. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of a rack for a control system in the embodiment;

[0018] Figure 2 It is a front view schematic view of a rack for a control system in the embodiment;

[0019] Figure 3 It is a Figure 2 schematic view of the structure of the section A-A;

[0020] Figure 4 It is a schematic view of the structure of the clamping seat of a rack for a control system in the embodiment;

[0021] Figure 5 It is a top view schematic view of the clamping seat of a rack for a control system in the embodiment;

[0022] Figure 6 It is a Figure 5 schematic view of the structure of the section B-B;

[0023] Markings in the drawings and corresponding names of parts:

[0024] 1-main body; 2-mounting groove; 3-circuit printed board bottom plate; 4-socket; 5-cover plate; 6-clamping seat; 7-clamping groove;

[0025] 8-elastic sheet; 81-connection section; 82-abutment section; 83-first guide section; 84-second guide section;

[0026] 9-movement gap; 10-guide plate. DETAILED DESCRIPTION

[0027] The utility model will be further described below in combination with the drawings.

[0028] Embodiment 1

[0029] Existing patent application number 202320588686.5 discloses a splicing board controller, including a housing; the upper end of the housing has a detachable top cover plate 5, and the bottom inner side of the housing has a circuit printed circuit board base plate 3 with several sockets 4 for connecting to the circuit printed circuit board; the side wall of the housing also has a connector mounting plate with several connectors for realizing internal and external cable communication; the inner side wall of the housing has several guide rails, which are slidably connected to the side wall of the circuit printed circuit board, and the guide rails are arranged in a direction perpendicular to the bottom plate 3 of the circuit printed circuit board; the guide rails include two parallel sliders, which are slidably connected to the side wall of the circuit printed circuit board.

[0030] However, in actual operation, the end of the printed circuit board away from the socket 4 was not effectively connected to the top cover 5, which greatly reduced the stability of the printed circuit board.

[0031] Therefore, this embodiment 1 provides a frame for a control system, such as Figures 1-3 As shown, the device includes a main body 1, a cover plate 5, and a connector 6. One end of the main body 1 has a mounting groove 2, in which a circuit printed circuit board (PCB) base plate 3 is installed. A socket 4 is located on the side of the PCB base plate 3 near the opening of the mounting groove 2, and the socket 4 is used to connect to one end of the PCB card. The cover plate 5 is connected to the main body 1. The connector 6 is located on the side of the cover plate 5 near the PCB base plate 3, and a connector groove 7 is located on the side of the connector 6 away from the cover plate 5. The connector groove 7 corresponds to the socket 4 and is used to connect to the other end of the PCB card.

[0032] For example, in the implementation process, a mounting groove 2 is provided at one end of the main body 1, and a circuit printed circuit board base plate 3 is installed in the mounting groove 2. A socket 4 is provided on the side of the circuit printed circuit board base plate 3 near the opening of the mounting groove 2. The socket 4 is used to connect one end of the circuit printed circuit board card. A connector mounting plate can also be provided on the outer wall of the main body 1. The connector mounting plate has a connector for realizing internal and external cable communication. The structure of the main body 1, the circuit printed circuit board base plate 3, the socket 4, the circuit printed circuit board card, and the connector mounting plate adopts the structure of the prior art, which will not be described in detail here. For example, the main body 1, the circuit printed circuit board base plate 3, the socket 4, the circuit printed circuit board card, and the connector mounting plate disclosed in the prior art patent application number 202320588686.5 can be referred to.

[0033] The cover plate 5 is connected to the mounting slot 2 of the main body 1, serving to protect the components inside the mounting slot 2. At the same time, the cover plate 5 is detachably connected to the main body 1 by screws, pins, fasteners, and other structures, effectively improving the convenience of maintaining and replacing the components inside the mounting slot 2.

[0034] The connector 6 is installed on the side of the cover plate 5 facing the circuit printed circuit board base plate 3 by means of welding, screwing, or other methods. A connector groove 7 is provided on the side of the connector 6 near the circuit printed circuit board base plate 3. The position of the connector groove 7 corresponds to the socket 4 on the circuit printed circuit board base plate 3, so as to facilitate the connection of the connector 6 to the other end of the circuit printed circuit board card.

[0035] When installing the printed circuit board (PCB) card, one end of the PCB card can be inserted into the socket 4 on the PCB base plate 3 first. Then, align the slot 7 of the connector 6 on the cover plate 5 with the other end of the PCB card and slide the other end of the PCB card into the slot 7 of the connector 6 on the cover plate 5. Alternatively, one end of the PCB card can be inserted into the slot 7 of the connector 6 on the cover plate 5 first, then align the other end of the PCB card with the socket 4 on the PCB base plate 3 and slide the other end of the PCB card into the socket 4 on the PCB base plate 3. This fixes one end of the PCB card in the socket 4 and the other end in the slot 7 of the connector 6. This significantly improves the stability of the PCB card after installation and reduces the risk of loosening or falling off due to vibration or external force. Meanwhile, the snap-fit ​​method between the snap-fit ​​slot 7 on the snap-fit ​​socket 6 and the circuit printed circuit board card effectively ensures the convenience of circuit printed circuit board card installation and subsequent maintenance.

[0036] When disassembling the circuit board, simply pull the circuit board outward gently.

[0037] Example 2

[0038] like Figures 4-6 As shown, based on the above embodiment 1, in this embodiment, an elastic sheet 8 is provided in the snap-fit ​​groove 7; the elastic sheet 8 extends along the bottom of the snap-fit ​​groove 7 towards the opening of the snap-fit ​​groove 7; a movement gap 9 is provided between the elastic sheet 8 and the groove wall of the snap-fit ​​groove 7; the movement gap 9 is used to reserve space for the elastic sheet 8 to move closer to or further away from the groove wall of the snap-fit ​​groove 7; the side of the elastic sheet 8 away from the movement gap 9 is used to abut against the side wall of the printed circuit board.

[0039] For example, in implementation, the frame also includes an elastic piece 8 disposed in the snap-fit ​​groove 7, the elastic piece 8 extending along the bottom of the snap-fit ​​groove 7 toward the opening of the snap-fit ​​groove 7. A certain movement gap 9 is left between the elastic piece 8 and the groove wall of the snap-fit ​​groove 7, the movement gap 9 being used to allow space for the elastic piece 8 to move closer to or away from the groove wall of the snap-fit ​​groove 7.

[0040] In the process of installing the circuit board card, first, align one end of the circuit board card with the clamping groove 7 of the clamping seat 6 on the cover plate 5. Then, gently push the circuit board card. At this time, the elastic sheet 8 will move in the direction of the movement gap 9 due to the extrusion of the side wall of the circuit board card. When the circuit board card is completely inserted into the clamping groove 7, the elastic sheet 8 will tightly abut against the side wall of the circuit board card under the action of its own elasticity. On the one hand, it effectively ensures the stability of the circuit board card in the clamping groove 7. Even if it is subjected to external vibration or impact, the elastic force of the elastic sheet 8 can effectively reduce the risk of loosening or falling off of the circuit board card, thereby improving the stability of the system. On the other hand, during the process of gently pushing the circuit board card into the clamping groove 7, the elastic sheet 8 will automatically adjust the position, effectively reducing the risk of damage to the circuit board card by the elastic sheet 8. On the other hand, the elastic sheet 8 can adapt to circuit board cards of different thicknesses, and has good universality and adaptability.

[0041] In the process of disassembling the circuit board card, gently pull the circuit board card outwards. At this time, the elastic sheet 8 will again give space. Effectively reduce the risk of damage to the circuit board card by the elastic sheet 8.

[0042] Example 3

[0043] As shown in FIG. 6, based on the above-mentioned example 2, in this embodiment, the elastic sheet 8 includes a connecting section 81; the connecting section 81 is connected to the groove bottom or groove wall of the clamping groove 7; the connecting section 81 gradually moves away from the groove wall of the clamping groove 7 along the direction from the groove bottom of the clamping groove 7 to the groove opening of the clamping groove 7; and the end of the connecting section 81 close to the groove opening of the clamping groove 7 is used to abut against the side wall of the circuit board card.

[0044] For example, in the implementation process, the above-mentioned elastic sheet 8 includes a connecting section 81. The connecting section 81 is connected to the groove bottom or groove wall of the clamping groove 7 by welding, screwing, pouring, etc., and gradually moves away from the groove wall of the clamping groove 7 along the direction from the groove bottom of the clamping groove 7 to the groove opening of the clamping groove 7. Among them, the end of the connecting section 81 close to the groove opening of the clamping groove 7 is used to abut against the side wall of the circuit board card.

[0045] In the installation of the circuit board card, first align the one end of the circuit board card with the clamping groove 7 of the clamping seat 6 on the cover plate 5. Then, gently push the circuit board card. At this time, the connecting section 81 will move to the direction of the groove wall of the clamping groove 7 due to the extrusion of the side wall of the circuit board card. When the circuit board card is completely inserted into the clamping groove 7, under the action of the self elasticity of the connecting section 81, the end of the connecting section 81 close to the slot of the clamping groove 7 will tightly abut against the side wall of the circuit board card. The contact area between the connecting section 81 and the circuit board card is effectively reduced, and the stress concentration effect between the connecting section 81 and the circuit board card is improved, so as to achieve the purpose of improving the abutting stability between the end of the connecting section 81 close to the slot of the clamping groove 7 and the circuit board card.

[0046] In the disassembly of the circuit board card, gently pull out the circuit board card. At this time, the connecting section 81 will give way again. The risk of damage of the connecting section 81 to the circuit board card is effectively reduced.

[0047] Embodiment 4

[0048] As shown in FIG. 6, based on the above-mentioned embodiment 3, in the present embodiment, the elastic sheet 8 further comprises an abutting section 82; the abutting section 82 is connected to the end of the connecting section 81 close to the slot of the clamping groove 7; the abutting section 82 extends along the groove bottom of the clamping groove 7 to the direction of the slot of the clamping groove 7; the middle part of the abutting section 82 is curved into an arc structure in the direction away from the groove wall of the clamping groove 7; and the side of the abutting section 82 away from the groove wall of the clamping groove 7 is used for abutting against the side wall of the circuit board card.

[0049] For example, in the implementation process, the above-mentioned elastic sheet 8 further comprises an abutting section 82. The abutting section 82 is connected to the end of the connecting section 81 close to the slot of the clamping groove 7 by welding, screwing or one-piece forming, and extends along the groove bottom of the clamping groove 7 to the direction of the slot of the clamping groove 7. The middle part of the abutting section 82 is curved into an arc structure in the direction away from the groove wall of the clamping groove 7, and the side of the abutting section 82 away from the groove wall of the clamping groove 7 is used for abutting against the side wall of the circuit board card.

[0050] In the installation of the circuit board card, first align the one end of the circuit board card with the clamping groove 7 of the clamping seat 6 on the cover plate 5. Then, gently push the circuit board card. At this time, the abutting section 82 will move to the direction of the groove wall of the clamping groove 7 due to the extrusion of the sidewall of the circuit board card. When the circuit board card completely enters the clamping groove 7, the abutting section 82 will tightly abut against the sidewall of the circuit board card under the elastic force of the connecting section 81. The arc-shaped structure of the abutting section 82 effectively reduces the pressure of the local contact point between the abutting section 82 and the circuit board card, thereby reducing the risk of wear or damage of the circuit board card caused by excessive local pressure, thereby prolonging the service life of the circuit board card.

[0051] Embodiment 5

[0052] As shown in 6, on the basis of the above-mentioned embodiment 4, in this embodiment, the elastic sheet 8 further comprises a first guide section 83; the first guide section 83 is connected to one end of the abutting section 82 away from the connecting section 81; the first guide section 83 gradually approaches the groove wall of the clamping groove 7 along the direction from the groove bottom of the clamping groove 7 to the groove opening of the clamping groove 7; wherein the first guide section 83 is used to guide the circuit board card into the abutting section 82.

[0053] Exemplarily, in the implementation process, the above-mentioned elastic sheet 8 further comprises a first guide section 83. The first guide section 83 is connected to one end of the abutting section 82 away from the connecting section 81 by welding, screwing or one-piece forming. The first guide section 83 gradually approaches the groove wall of the clamping groove 7 along the direction from the groove bottom of the clamping groove 7 to the groove opening of the clamping groove 7, and the first guide section 83 is used to guide the circuit board card into the abutting section 82.

[0054] In the installation of the circuit board card, first align the one end of the circuit board card with the clamping groove 7 of the clamping seat 6 on the cover plate 5. Then, gently push the circuit board card. At this time, the abutting section 82 will move to the direction of the groove wall of the clamping groove 7 due to the extrusion of the sidewall of the circuit board card. When the circuit board card completely enters the clamping groove 7, the abutting section 82 will tightly abut against the sidewall of the circuit board card under the elastic force of the connecting section 81. The arc-shaped structure of the abutting section 82 effectively reduces the pressure of the local contact point between the abutting section 82 and the circuit board card, thereby reducing the risk of wear or damage of the circuit board card caused by excessive local pressure, thereby prolonging the service life of the circuit board card.

[0055] Embodiment 6

[0056] As shown in FIG. 6, based on the above-mentioned embodiment 5, in the present embodiment, the elastic sheet 8 further comprises a second guide section 84; the second guide section 84 is connected to the first guide section 83 near one end of the slot opening of the clamping groove 7; the second guide section 84 extends along the direction from the groove bottom to the slot opening of the clamping groove 7; the middle part of the second guide section 84 is curved into an arc structure in the direction away from the groove wall of the clamping groove 7; wherein the second guide section 84 is used to guide the circuit board into the first guide section 83.

[0057] Exemplarily, in the implementation process, the elastic sheet 8 further comprises a second guide section 84. The second guide section 84 is connected to the first guide section 83 near one end of the slot opening of the clamping groove 7 by welding, screwing or one-piece forming, and the second guide section 84 extends along the direction from the groove bottom to the slot opening of the clamping groove 7. The middle part of the second guide section 84 is curved into an arc structure in the direction away from the groove wall of the clamping groove 7, and the second guide section 84 is used to guide the circuit board into the first guide section 83.

[0058] In the process of installing the circuit board, first, align one end of the circuit board with the clamping groove 7 of the clamping seat 6 on the cover plate 5. Then, gently push the circuit board. At this time, the circuit board slides along the second guide section 84 to the first guide section 83, then slides along the first guide section 83 to the abutting section 82, and finally contacts the abutting section 82. The arc structure of the second guide section 84 can guide the circuit board to smoothly enter the first guide section 83, thereby further achieving the purpose of reducing the resistance and difficulty during installation, and improving the convenience of installation.

[0059] Embodiment 7

[0060] As shown in FIG. 4, based on any one of the above-mentioned embodiments 2-6, in the present embodiment, the number of the elastic sheet 8 is set to be several; the several elastic sheets 8 are uniformly arranged along the direction from one end of the clamping groove 7 to the other end of the clamping groove 7.

[0061] Exemplarily, in the implementation process, the number of the elastic sheet 8 is set to be several, and the several elastic sheets 8 are uniformly arranged along the direction from one end of the clamping groove 7 to the other end of the clamping groove 7. When the circuit board completely enters the clamping groove 7, the multiple elastic sheets 8 will abut against multiple positions of the circuit board. This achieves the purpose of effectively improving the stability of the circuit board.

[0062] Preferably, the elastic sheet 8 is provided with two rows, and the two elastic sheets 8 are respectively located on both sides of the clamping groove 7.

[0063] Embodiment 8

[0064] As shown in FIG. 4, on the basis of the above-mentioned embodiment 7, in the present embodiment, the rack further comprises a guide plate 10; the guide plate 10 is arranged on the slot wall of the clamping slot 7; the guide plate 10 is arranged between any two adjacent elastic sheets 8.

[0065] Exemplarily, in the implementation process, the rack further comprises a guide plate 10. The guide plate 10 is connected to the slot wall of the clamping slot 7 by welding, screwing or one-piece forming and the like. In the direction from one end of the clamping slot 7 to the other end of the clamping slot 7, the guide plate 10 is arranged between any two adjacent elastic sheets 8. In the process that the elastic sheet 8 approaches or moves away from the slot wall of the clamping slot 7, the guide plate 10 can guide the movement direction of the elastic sheet 8, so as to achieve the purpose of reducing the risk of the elastic sheet 8 tilting in the direction from one end of the clamping slot 7 to the other end of the clamping slot 7.

[0066] Although the present application has been described with reference to the explanatory embodiments thereof, it should be understood that many other modifications and embodiments would be apparent to those skilled in the art without departing from the principles and spirit of the present application. More specifically, many variations and modifications of the subject combination arrangement can be made to the constituent components and / or arrangement within the scope of the present application disclosure, drawings and claims. In addition to variations and modifications of the constituent components and / or arrangement, other uses would be apparent to those skilled in the art.

Claims

1. A control system rack characterized by, The utility model relates to a kind of machine frame, including: Main body (1), one end of the main body (1) is provided with installation slot (2), line printing board bottom plate (3) is installed in the installation slot (2), the line printing board bottom plate (3) is provided with socket (4) near the slot mouth side of the installation slot (2), and the socket (4) is used to connect with the one end of line printing board card; Cover plate (5), the cover plate (5) is connected to the main body (1); Clamping seat (6), the clamping seat (6) is provided in the cover plate (5) near the line printing board bottom plate (3) side, and the clamping seat (6) is provided with clamping slot (7) away from the cover plate (5) side;Wherein, the clamping slot (7) corresponds with the socket (4), and the clamping slot (7) is used to connect with the other end of line printing board card.

2. The rack of claim 1, wherein: The clamping slot (7) is provided with elastic sheet (8); The elastic sheet (8) extends along the direction from the bottom of the clamping slot (7) to the slot mouth of the clamping slot (7); The elastic sheet (8) and the slot wall of the clamping slot (7) are provided with movement gap (9); The movement gap (9) is used to reserve the movement space of the elastic sheet (8) to the slot wall of the clamping slot (7); The side of the elastic sheet (8) away from the movement gap (9) is used to abut against the side wall of line printing board card.

3. The rack of claim 2, wherein: The elastic sheet (8) includes connecting section (81); The connecting section (81) is connected to the bottom or the slot wall of the clamping slot (7); The connecting section (81) gradually moves away from the slot wall of the clamping slot (7) along the direction from the bottom of the clamping slot (7) to the slot mouth of the clamping slot (7); The end of the connecting section (81) near the slot mouth of the clamping slot (7) is used to abut against the side wall of line printing board card.

4. The rack of claim 3, wherein: The elastic sheet (8) further includes abutting section (82); The abutting section (82) is connected to the end of the connecting section (81) near the slot mouth of the clamping slot (7); The abutting section (82) extends along the direction from the bottom of the clamping slot (7) to the slot mouth of the clamping slot (7); The middle part of the abutting section (82) is curved into arc structure in the direction away from the slot wall of the clamping slot (7); The side of the abutting section (82) away from the slot wall of the clamping slot (7) is used to abut against the side wall of line printing board card.

5. The rack of claim 4, wherein: The elastic sheet (8) further includes first guide section (83); The first guide section (83) is connected to the end of the abutting section (82) away from the connecting section (81); The first guide section (83) gradually moves close to the slot wall of the clamping slot (7) along the direction from the bottom of the clamping slot (7) to the slot mouth of the clamping slot (7); The first guide section (83) is used to guide line printing board card into the abutting section (82).

6. The rack of claim 5, wherein: The elastic sheet (8) further comprises a second guiding section (84); The second guiding section (84) is connected to the first guiding section (83) near one end of the slot opening of the clamping groove (7); The second guiding section (84) extends along the groove bottom of the clamping groove (7) to the direction of the slot opening of the clamping groove (7); The middle part of the second guiding section (84) is curved into an arc structure away from the groove wall of the clamping groove (7); The second guiding section (84) is used for guiding the line circuit board card into the first guiding section (83).

7. The rack of any one of claims 2-6, characterized in that: The number of the elastic sheets (8) is several; The several elastic sheets (8) are evenly arranged along one end of the clamping groove (7) to the other end of the clamping groove (7).

8. The rack of claim 7, characterized in that: Further comprising a guiding plate (10); The guiding plate (10) is arranged on the groove wall of the clamping groove (7); Any adjacent two elastic sheets (8) are provided with the guiding plate (10).

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