Industrial personal computer mainboard fixing structure and industrial personal computer

Abstract

The invention discloses an industrial personal computer mainboard fixing structure, and belongs to the technical field of industrial personal computers, the industrial personal computer mainboard fixing structure can be installed on an industrial personal computer, the industrial personal computer comprises a case, the industrial personal computer mainboard fixing structure comprises a base and a fixing assembly, the base is installed in the case; the fixing assembly is installed on the base, the fixing assembly comprises a pressing part, a limiting part and a pre-tightening assembly, the limiting part can be folded and unfolded, an installation hole in the industrial personal computer mainboard can be arranged on the base in a sleeving mode from the pressing part and penetrate through the folded limiting part, and after the pressing part is pressed down, the limiting part is unfolded and presses the upper surface of the industrial personal computer mainboard. Meanwhile, the pre-tightening assembly is connected with the pressing part and drives the pressing part to apply pre-tightening pressure to the industrial personal computer mainboard after the pressing part is pressed down; in the use process, only the pressing part needs to be pressed down, second-level installation can be basically achieved, the operation process is greatly simplified, and the installation speed is effectively increased.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial control computers, and more particularly to an industrial control computer mainboard fixing structure and the industrial control computer. Background Art

[0002] Industrial computers are computers designed specifically for industrial environments. They have the characteristics of high reliability, anti-interference, and resistance to harsh environments. They are widely used in fields such as automated control, data acquisition, machine vision, and edge computing.

[0003] The motherboard is one of the core components inside the industrial computer and needs to be stably fixed inside the industrial computer. Currently, the motherboard inside the industrial computer is mainly fixed with screws. This fixing method has the advantages of simple structure and easy assembly, so it is widely used. However, it has certain defects, namely: When screws are used for fixing, the screws need to be screwed multiple times, which is a relatively cumbersome operation and results in a slow installation speed. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an industrial computer mainboard fixing structure to solve the problems existing in the above-mentioned background technology.

[0005] The present invention provides the following technical solution: an industrial computer motherboard fixing structure, which can be installed on an industrial computer, the industrial computer including a chassis, and the industrial computer motherboard fixing structure comprising: a base, which is mounted in the chassis; A fixing component is installed on the base. The fixing component includes a pressing part, a limiting part and a pre-tightening component. The limiting part can be folded and unfolded. The mounting hole on the industrial computer mainboard can be inserted into the pressing part and passed through the folded limiting part and then mounted on the base. After the pressing part is pressed, the limiting part unfolds and presses the upper surface of the industrial computer mainboard. At the same time, the pre-tightening component is connected to the pressing part and drives the pressing part to apply pre-tightening pressure to the industrial computer mainboard after the pressing part is pressed down.

[0006] Furthermore, the pressing portion includes a first sliding sleeve and a second sliding sleeve, the first sliding sleeve is fixedly inserted in the middle of the base, and the second sliding sleeve is slidably inserted in the middle of the first sliding sleeve.

[0007] Furthermore, the limiting part includes a limiting rod and a driving rod, one end of the limiting rod is rotatably connected to the surface of the first sleeve, and the other end is rotatably connected to the end of the driving rod, the end of the driving rod away from the limiting rod is rotatably connected to the surface of the second sleeve, and the sliding of the second sleeve will drive the limiting rod to rotate through the driving rod and press it on the mainboard of the industrial computer.

[0008] Furthermore, the pre-tightening assembly includes a limiting ring, a cavity is provided in the middle of the base, the limiting ring is slidably installed in the cavity, and a first compression spring is connected between the limiting ring and the top surface of the cavity.

[0009] Furthermore, the pressing part also includes a limiting wedge block, which is slidably inserted into the side of the second sleeve. A control component is provided in the middle of the second sleeve, and the sliding of the limiting wedge block is controlled by the control component. At the same time, the limiting wedge block is driven by the control component and slides out of the surface of the first sleeve under normal conditions. The wedge surface of the limiting wedge block faces the inner ring surface of the limiting ring, and when the first sleeve slides toward the limiting ring, the inner ring surface of the limiting ring can push the limiting wedge block to slide into the first sleeve through the wedge surface of the limiting wedge block. A third compression spring is connected between the bottom end of the second sleeve and the bottom surface of the cavity, and the second sleeve drives the limiting part to be in a folded state under the action of the third compression spring, and the elastic force of the third compression spring is smaller than that of the first compression spring.

[0010] Furthermore, the control assembly includes a control rod, a fixed retaining ring, a movable retaining ring and a second compression spring. The control rod is slidingly arranged in the second sleeve, the fixed retaining ring is fixedly installed in the middle of the second sleeve, the movable retaining ring is fixedly installed on the control rod, the second compression spring is installed between the fixed retaining ring and the movable retaining ring, and the movable retaining ring drives the control rod to slide upward under the action of the second compression spring, and the end of the control rod is rotatably connected to the connecting rod, the end of the connecting rod away from the control rod is rotatably connected to the side of the limiting wedge block, and when the control rod slides upward, it will drive the limiting wedge block to slide outward of the second sleeve through the connecting rod, and when the control rod slides downward, it will drive the limiting wedge block to slide into the second sleeve through the connecting rod.

[0011] Furthermore, a jacking assembly is provided in the cavity, and the limiting ring can be pushed to slide above the limiting wedge by the jacking assembly. The jacking assembly is configured to operate when the second sliding sleeve slides into the cavity.

[0012] Furthermore, the lifting assembly includes a cover body, a piston, an air outlet and a lifting sleeve. The cover body is fixedly installed at the bottom of the cavity, and there is a gap between the cover body and the inner wall of the cavity. The lifting sleeve is sealingly slidably installed in the gap, and the piston is slidably installed in the cover body. The bottom end of the second sleeve extends into the cover body and is fixedly connected to the piston. The third compression spring is inside the cover body and between the piston and the bottom of the cover body. There are several air outlets, and they are all opened through the surface of the cover body and close to the bottom of the cover body. At the same time, the air outlets connect the cover body and the gap. The downward sliding of the second sleeve will drive the piston to slide to squeeze the air in the cover body from the air outlet into the gap, and push the lifting sleeve to slide up to push the limit ring to slide.

[0013] Furthermore, a pressure relief hole is provided through the surface of the base and is communicated with the bottom end of the gap. At the same time, the instantaneous air flow rate of the pressure relief hole is smaller than the instantaneous air flow rate of the air outlet hole.

[0014] The present application also discloses an industrial computer, comprising the above-mentioned industrial computer mainboard fixing structure.

[0015] During use of the present application, it is only necessary to press the pressing part, which can basically achieve "second-level" installation, greatly simplifying the operation process and effectively improving the installation speed; at the same time, when fixing the motherboard, the fixing force of this fixing structure is mainly achieved by the elastic force of the first compression spring. Under this structure, the pressure on the surface of the motherboard can be ensured to be almost constant. Compared with screw fixation, it can effectively avoid the situation where the screw is over-tightened and causes damage to the surface of the motherboard, and it is safer to use; and, since the limiting force on the motherboard is provided by the first compression spring, when the entire industrial computer is used in some vibration environments, if there is an installation gap between the motherboard and the base, it can also always keep the motherboard pressed tightly to prevent the motherboard from loosening, and it is more stable to use; in addition, since screw installation is not required, the risk of short circuit caused by screws falling into the chassis during installation, or the problem of loose fixation caused by missing screws can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of fixing the mainboard of the present invention; Figure 2 Schematic diagram of the internal structure of the present invention; Figure 3 For the present invention Figure 2 A in the middle is an enlarged structural diagram; Figure 4 For the present invention Figure 2 The enlarged structural diagram at B in the middle; Figure 5 Schematic diagram of the internal structure of the second sliding sleeve of the present invention.

[0017] The accompanying drawings are marked as follows: 100, base; 110, cavity; 120, pressure relief hole; 200, pressing part; 210, first sliding sleeve; 220, second sliding sleeve; 230, limiting wedge; 240, third compression spring; 300, limiting part; 310, limiting rod; 320, driving rod; 400, preload assembly; 410, limiting ring; 420, first compression spring; 500, control assembly; 510, control rod; 520, fixed retaining ring; 530, movable retaining ring; 540, second compression spring; 550, connecting rod; 600, lifting assembly; 610, cover; 620, piston; 630, air outlet; 640, lifting sleeve; 650, gap. DETAILED DESCRIPTION

[0018] The technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples and are not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] Reference Figure 1 The present invention provides an industrial computer motherboard fixing structure, which can be installed on an industrial computer. The industrial computer includes a chassis. The industrial computer motherboard fixing structure includes: a base 100 and a fixing component. The base 100 is installed in the chassis; the fixing component is installed on the base 100. The fixing component includes a pressing part 200, a limiting part 300 and a pre-tightening component 400. The limiting part 300 can be folded and unfolded. The mounting hole on the industrial computer motherboard can be inserted into the pressing part 200 and passed through the folded limiting part 300 and then mounted on the base 100. After the pressing part 200 is pressed, the limiting part 300 is unfolded and presses the upper surface of the industrial computer motherboard. At the same time, the pre-tightening component 400 is connected to the pressing part 200 and drives the pressing part 200 to apply pre-tightening pressure to the industrial computer motherboard after the pressing part 200 is pressed.

[0020] Among them, the base 100 is cylindrical and has a regular hexagonal cross-section, which is convenient for twisting with a wrench. A threaded column is fixed at the bottom end of the base 100, which can be threaded into the motherboard mounting hole in the industrial computer chassis. A flexible buffer pad is fixed at the top end of the base 100, which can be made of rubber to avoid wear caused by rigid contact between the motherboard and the base 100, and also plays a buffering role during vibration.

[0021] Continue as Figure 1 As shown, the pressing part 200 includes a first sliding sleeve 210 and a second sliding sleeve 220, the first sliding sleeve 210 is fixedly inserted in the middle of the base 100, and the second sliding sleeve 220 is slidably inserted in the middle of the first sliding sleeve 210, wherein the outer cross-sectional shape of the second sliding sleeve 220 is the same as the inner cross-sectional shape of the first sliding sleeve 210, thereby ensuring that the second sliding sleeve 220 can stably slide in the middle of the first sliding sleeve 210, and its sliding direction is along the axial direction of the first sliding sleeve 210.

[0022] Continue as Figure 1 As shown, the limiting portion 300 includes a limiting rod 310 and a driving rod 320. One end of the limiting rod 310 is rotatably connected to the surface of the first sleeve 210, and the other end is rotatably connected to the end of the driving rod 320. The end of the driving rod 320 away from the limiting rod 310 is rotatably connected to the surface of the second sleeve 220, and the sliding of the second sleeve 220 will drive the limiting rod 310 to rotate through the driving rod 320 and press it on the mainboard of the industrial computer.

[0023] Among them, when the connection point of the limit rod 310 on the first sleeve 210 is farthest from the connection point of the drive rod 320 on the second sleeve 220, the limit rod 310 and the drive rod 320 tend to be collinear, and the limit part 300 is in a folded state, so that the limit part 300 occupies the smallest space range (in the plane direction on the industrial computer motherboard) to facilitate the insertion of the motherboard. When the connection point of the limit rod 310 on the first sleeve 210 and the connection point of the drive rod 320 on the second sleeve 220 are closest to each other, the limit part 300 is in an unfolded state, occupies the largest space range, and exceeds the diameter range of the mounting hole on the industrial computer motherboard, thereby being able to limit the motherboard.

[0024] like Figure 2 and Figure 3 As shown, the preload assembly 400 includes a limiting ring 410 , a cavity 110 is provided in the middle of the base 100 , the limiting ring 410 is slidably installed in the cavity 110 , and a first compression spring 420 is connected between the limiting ring 410 and the top surface of the cavity 110 .

[0025] The two ends of the first compression spring 420 are fixedly connected to the top surface of the cavity 110 and the limiting ring 410 by welding, and the first compression spring 420 needs to have a large elastic force so that the entire fixing mechanism can ensure the stability of the mainboard when pressing the mainboard.

[0026] like Figure 2 、 Figure 3 and Figure 5 As shown, the pressing portion 200 also includes a limiting wedge block 230, which is slidably inserted into the side of the second sliding sleeve 220. A control component 500 is provided in the middle of the second sliding sleeve 220, and the limiting wedge block 230 is controlled to slide by the control component 500. At the same time, the limiting wedge block 230 is driven by the control component 500 and slides out of the surface of the first sliding sleeve 210 under normal conditions. The wedge surface of the limiting wedge block 230 faces the inner ring surface of the limiting ring 410, and when the first sliding sleeve 210 slides toward the limiting ring 410, the inner ring surface of the limiting ring 410 can push the limiting wedge block 230 to slide into the first sliding sleeve 210 through the wedge surface of the limiting wedge block 230. A third compression spring 240 is connected between the bottom end of the second sliding sleeve 220 and the inner bottom surface of the cavity 110, and the second sliding sleeve 220 drives the limiting portion 300 to be in a folded state under the action of the third compression spring 240. At the same time, the elastic force of the third compression spring 240 is less than that of the first compression spring 420.

[0027] Continue as Figure 2 、 Figure 3 and Figure 5As shown, the control assembly 500 includes a control rod 510, a fixed retaining ring 520, a movable retaining ring 530 and a second compression spring 540. The control rod 510 is slidably disposed in the second sliding sleeve 220, the fixed retaining ring 520 is fixedly mounted in the middle of the second sliding sleeve 220, the movable retaining ring 530 is fixedly mounted on the control rod 510, and the second compression spring 540 is mounted between the fixed retaining ring 520 and the movable retaining ring 530. The movable retaining ring 530 drives the control rod 510 upward ( Figure 1 When the control rod 510 slides upward (in the upper direction), the end of the control rod 510 is rotatably connected to the connecting rod 550, and the end of the connecting rod 550 away from the control rod 510 is rotatably connected to the side of the limiting wedge 230. When the control rod 510 slides upward, the limiting wedge 230 is driven to slide outward of the second sliding sleeve 220 through the connecting rod 550. When the control rod 510 slides downward, the limiting wedge 230 is driven to slide into the second sliding sleeve 220 through the connecting rod 550.

[0028] The second sleeve 220 is a hollow structure. The size of the control rod 510 corresponds to the inner ring size of the second sleeve 220 and enables the control rod 510 to slide tightly in the middle of the second sleeve 220 . The sliding direction is along the axis of the second sleeve 220 .

[0029] In this way, when in use, it is only necessary to install the base 100 on the mounting hole of the chassis motherboard of the industrial computer, and then align the mounting hole on the motherboard with the pressing part 200 and the limiting part 300, and then press the second sliding sleeve 220, and the second sliding sleeve 220 will slide down. During this process, the second sliding sleeve 220 will drive the driving rod 320 to rotate, and the driving rod 320 will drive the limiting rod 310 to rotate until the limiting rod 310 is pressed tightly against the surface of the motherboard. At the same time, when the second sliding sleeve 220 slides down, it will drive the limiting wedge 230 to slide down synchronously, and when the limiting wedge 230 contacts the upper surface of the limiting ring 410, the limiting ring 410 is affected. Due to the pulling force of the first compression spring 420, its downward movement is relatively small. Therefore, when the limiting wedge block 230 contacts the upper surface of the limiting ring 410, it will be subjected to the reaction force of the inner ring surface of the limiting ring 410 and slide into the second sleeve 220. After the limiting wedge block 230 completely slides to the bottom of the limiting ring 410, it slides out again under the action of the second compression spring 540. At this time, the limiting ring 410 will limit the limiting wedge block 230 under the action of the first compression spring 420 to prevent the second sleeve 220 from resetting, to ensure that the driving rod 320 and the limiting rod 310 remain stationary, thereby completing the fixation of the mainboard.

[0030] When the mainboard needs to be removed, it is only necessary to insert a hard, slender object such as a steel needle into the middle of the second sleeve 220 to push the fixed retaining ring 520 to move. The fixed retaining ring 520 will drive the control rod 510 to slide down. The sliding of the control rod 510 will drive the limiting wedge 230 to slide into the second sleeve 220 through the connecting rod 550. At this time, the limiting ring 410 cannot limit the second sleeve 220. The second sleeve 220 will be reset under the action of the third compression spring 240, so that the limiting part 300 will fold, thereby losing the limit on the mainboard. At this time, the mainboard can be directly removed.

[0031] In summary, when using the fixing structure proposed in this application to fix the mainboard, it is only necessary to press the pressing part 200, which can basically achieve "second-level" installation, greatly simplifying the operation process and effectively improving the installation speed.

[0032] At the same time, when this fixing structure fixes the motherboard, its fixing force is mainly achieved by the elastic force of the first compression spring 420. Under this structure, it can ensure that the pressure on the surface of the motherboard is almost in a constant state. Compared with screw fixation, it can effectively avoid the situation where the screw is over-tightened and causes damage to the surface of the motherboard, and it is safer to use.

[0033] Furthermore, since the limiting force for the motherboard is provided by the first compression spring 420, when the entire industrial computer is used in some vibration environments, if there is an installation gap between the motherboard and the base 100, it can always keep the motherboard pressed tightly to prevent the motherboard from loosening, making it more stable to use.

[0034] In addition, since screws are not required for installation, the risk of screws falling into the chassis during installation, causing a short circuit, or the problem of loose fixation caused by missing screws, can be avoided.

[0035] In the above solution, since the first compression spring 420 is not subjected to pre-stress, it can only use its own elastic force to allow the limiting ring 410 to block the limiting wedge 230. Under this structure, the sliding amount of the limiting ring 410, the limiting wedge 230 and the second sliding sleeve 220 needs to be closely coordinated to ensure that when the limiting rod 310 is pressed against the surface of the main board, the limiting wedge 230 just passes through the limiting ring 410 to achieve stable limiting. The manufacturing technology is relatively difficult. Therefore, further optimization is carried out as follows: like Figure 2 、 Figure 3 and Figure 4 As shown, a lifting assembly 600 is added in the cavity 110 , and the lifting assembly 600 can push the limit ring 410 to slide above the limit wedge 230 . The lifting assembly 600 is configured to operate when the second sleeve 220 slides into the cavity 110 .

[0036] Continue as Figure 2 、 Figure 3 and Figure 4 The jacking assembly 600 includes a cover 610, a piston 620, air outlets 630 and a jacking sleeve 640, the cover 610 is fixedly installed at the bottom of the cavity 110, and a gap 650 exists between the cover 610 and the inner wall of the cavity 110, the jacking sleeve 640 is sealingly and slidably installed in the gap 650, the piston 620 is slidably installed in the cover 610, the bottom end of the second sliding sleeve 220 extends into the cover 610 and is fixedly connected with the piston 620, the third compression spring 240 is inside the cover 610 and between the piston 620 and the bottom of the cover 610, the air outlets 630 are a plurality of openings penetratingly provided on the surface of the cover 610 and close to the bottom of the cover 610, and the air outlets 630 communicate the cover 610 and the gap 650, the downward sliding of the second sliding sleeve 220 drives the piston 620 to slide to extrude the air in the cover 610 from the air outlets 630 into the gap 650, and drives the jacking sleeve 640 to slide upward to drive the limiting ring 410 to slide.

[0037] The surface of the base 100 is provided with a pressure relief hole 120 penetratingly provided therein, which communicates with the bottom end of the gap 650, and the instantaneous air flow of the pressure relief hole 120 is smaller than that of the air outlets 630.

[0038] Therefore, when the second sliding sleeve 220 slides downward, the piston 620 slides downward to extrude the air in the cover 610 from the air outlets 630, at this time, since the air outlet amount of the air outlets 630 is greater than that of the pressure relief hole 120, the air pressure in the gap 650 is increased to drive the jacking sleeve 640 to slide upward to drive the limiting ring 410 to slide upward and compress the first compression spring 420, at this time, the limiting wedge 230 also contacts the limiting ring 410 in advance to slide to the lower side of the limiting ring 410 earlier, and the first compression spring 420 has a pre-pressure due to the pressure, which further drives the second sliding sleeve 220 to slide downward to ensure that the limiting rod 310 can be in close contact with the surface of the mainboard, and since the limiting ring 410 can slide upward and the first compression spring 420 can be compressed, the cooperation difficulty between the limiting wedge 230 and the limiting ring 410 is reduced to facilitate manufacturing.

[0039] Finally, it should be noted that the up, down, left and right directions mentioned in the present application are the up, down, left and right directions in the Figure 1 .

[0040] The application also discloses an industrial computer, which comprises the industrial computer mainboard fixing structure.

[0041] Finally, it should be noted that the drawings of the embodiments disclosed herein only relate to structures related to the embodiments disclosed herein. Other structures may refer to conventional designs. In the absence of conflicts, the same embodiment and different embodiments of the present invention may be combined with each other. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fixing structure for an industrial computer motherboard, which can be installed on an industrial computer, wherein the industrial computer includes a chassis, and is characterized in that: The industrial computer mainboard fixing structure includes: A base (100) mounted in the chassis; A fixing assembly is mounted on a base (100), the fixing assembly comprising a pressing portion (200), a limiting portion (300) and a pre-tightening assembly (400), wherein the limiting portion (300) can be folded and unfolded, and the mounting hole on the industrial computer mainboard can be inserted from the pressing portion (200) and passed through the folded limiting portion (300) and then mounted on the base (100), and after the pressing portion (200) is pressed, the limiting portion (300) is unfolded and presses the upper surface of the industrial computer mainboard, and at the same time, the pre-tightening assembly (400) is connected to the pressing portion (200) and drives the pressing portion (200) to apply pre-tightening pressure to the industrial computer mainboard after the pressing portion (200) is pressed.

2. The industrial computer mainboard fixing structure according to claim 1, characterized in that: The pressing portion (200) comprises a first sliding sleeve (210) and a second sliding sleeve (220), wherein the first sliding sleeve (210) is fixedly inserted in the middle of the base (100), and the second sliding sleeve (220) is slidably inserted in the middle of the first sliding sleeve (210).

3. The industrial computer mainboard fixing structure according to claim 2, characterized in that: The limiting portion (300) includes a limiting rod (310) and a driving rod (320), one end of the limiting rod (310) is rotatably connected to the surface of the first sliding sleeve (210), and the other end is rotatably connected to the end of the driving rod (320), and the end of the driving rod (320) away from the limiting rod (310) is rotatably connected to the surface of the second sliding sleeve (220), and the sliding of the second sliding sleeve (220) drives the limiting rod (310) to rotate and press against the mainboard of the industrial computer through the driving rod (320).

4. The industrial computer mainboard fixing structure according to claim 2 or 3, characterized in that: The pre-tightening assembly (400) includes a limiting ring (410), a cavity (110) is provided in the middle of the base (100), the limiting ring (410) is slidably installed in the cavity (110), and a first compression spring (420) is connected between the limiting ring (410) and the top surface of the cavity (110).

5. The industrial computer mainboard fixing structure according to claim 4, characterized in that: The pressing portion (200) further includes a limiting wedge (230), which is slidably inserted into the side of the second sliding sleeve (220), and a control component (500) is provided in the middle of the second sliding sleeve (220), and the limiting wedge (230) is controlled to slide by the control component (500), and the limiting wedge (230) is driven by the control component (500) and slides out of the surface of the first sliding sleeve (210) under normal conditions, and the wedge surface of the limiting wedge (230) faces the inner ring surface of the limiting ring (410), and the first sliding sleeve (210) faces the limiting ring (410). When the ring (410) slides, the inner ring surface of the limiting ring (410) can push the limiting wedge (230) to slide into the first sliding sleeve (210) through the wedge surface of the limiting wedge (230), and a third compression spring (240) is connected between the bottom end of the second sliding sleeve (220) and the inner bottom surface of the cavity (110), and the second sliding sleeve (220) drives the limiting part (300) to be in a folded state under the action of the third compression spring (240), and at the same time, the elastic force of the third compression spring (240) is smaller than that of the first compression spring (420).

6. The industrial computer mainboard fixing structure according to claim 5, characterized in that: The control assembly (500) comprises a control rod (510), a fixed retaining ring (520), a movable retaining ring (530) and a second compression spring (540), wherein the control rod (510) is slidably arranged in the second sliding sleeve (220), the fixed retaining ring (520) is fixedly mounted in the middle of the second sliding sleeve (220), the movable retaining ring (530) is fixedly mounted on the control rod (510), the second compression spring (540) is mounted between the fixed retaining ring (520) and the movable retaining ring (530), and the movable retaining ring (530) is fixedly mounted on the second compression spring (540). The control rod (510) is driven to slide upward by the force of the spring (540), and the end of the control rod (510) is rotatably connected to the connecting rod (550). The end of the connecting rod (550) away from the control rod (510) is rotatably connected to the side of the limiting wedge (230), and the control rod (510) slides upward, which drives the limiting wedge (230) to slide outward of the second sliding sleeve (220) through the connecting rod (550), and the control rod (510) slides downward, which drives the limiting wedge (230) to slide into the second sliding sleeve (220) through the connecting rod (550).

7. The industrial computer mainboard fixing structure according to claim 5 or 6, characterized in that: A lifting assembly (600) is provided in the cavity (110), and the limiting ring (410) can be pushed to slide above the limiting wedge (230) by the lifting assembly (600), and the lifting assembly (600) is configured to operate when the second sliding sleeve (220) slides into the cavity (110).

8. The industrial computer mainboard fixing structure according to claim 7, characterized in that: The lifting assembly (600) includes a cover body (610), a piston (620), an air outlet (630) and a lifting sleeve (640), wherein the cover body (610) is fixedly mounted on the bottom of the cavity (110), and a gap (650) exists between the cover body (610) and the inner wall of the cavity (110), the lifting sleeve (640) is sealed and slidably mounted in the gap (650), the piston (620) is slidably mounted in the cover body (610), the bottom end of the second sliding sleeve (220) extends into the cover body (610) and is fixedly connected to the piston (620), and the third compression spring (220) is fixedly mounted on the bottom of the cavity (110). 40) is located inside the cover body (610) and between the piston (620) and the bottom of the cover body (610). There are several air outlet holes (630), which are all opened through the surface of the cover body (610) and close to the bottom of the cover body (610). At the same time, the air outlet holes (630) are connected to the cover body (610) and the gap (650). The second sliding sleeve (220) slides downward to drive the piston (620) to slide to squeeze the air in the cover body (610) from the air outlet holes (630) into the gap (650), and push the lifting sleeve (640) to slide upward to push the limit ring (410) to slide.

9. The industrial computer mainboard fixing structure according to claim 8, characterized in that: A pressure relief hole (120) is provided through the surface of the base (100), which is in communication with the bottom end of the gap (650), and the instantaneous air flow rate of the pressure relief hole (120) is smaller than the instantaneous air flow rate of the air outlet hole (630).

10. An industrial computer, characterized in that: The invention comprises an industrial computer mainboard fixing structure as described in any one of claims 1 to 9.

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