CN215379628U - Board card and cover body structure thereof - Google Patents

Abstract

The utility model provides a cover body structure of a card, which comprises a first cover body and a second cover body; the first cover body comprises two first side walls which are oppositely arranged and a first cover plate which is positioned between the two first side walls, and the first side walls are provided with clamping blocks; the second cover body comprises two second side walls which are arranged oppositely and a second cover plate which is positioned between the two second side walls, and the second cover body is provided with a clamping groove; the first cover body is buckled with the second cover body, and the clamping block is clamped and connected with the clamping groove; the fixture block is constructed to include connecting portion and spacing portion, and spacing portion and first lateral wall are connected respectively to the both ends of connecting portion, and spacing portion is used for restricting first lid to remove along the direction perpendicular to first lateral wall for the second lid. The utility model also provides a board card which comprises the board card cover body structure, a circuit board provided with the AI chip and a radiator. The board card and the cover body structure thereof can realize the limit in multiple directions and avoid the bad fixing structure of the cover body of the board card.

Description

Board card and cover body structure thereof

Technical Field

The utility model relates to the technical field of artificial intelligence, in particular to a board and a cover body structure thereof.

Background

With the rapid development of artificial intelligence chips, an artificial intelligence board based on a PCIE (peripheral component interconnect express, high-speed serial computer expansion bus standard) architecture is widely applied to scenes such as data centers and servers.

The board card generally includes an upper cover, a base, a heat sink and a circuit board equipped with an AI (artificial intelligence) chip, the upper cover and the base are fixed by a plurality of screws, the heat sink is installed in a heat dissipation air duct enclosed by the upper cover and the base, and the circuit board is installed on the bottom surface of the base.

However, the assembly process is complicated and inefficient due to the multiple screws for fixing the upper cover and the base, and the screws are prone to have a tooth slipping phenomenon after long-term use, so that the upper cover and the base cannot be assembled and fastened, and particularly, in the case of repeatedly disassembling and assembling the upper cover and the base, the cover body fixing structure between the upper cover and the base is very prone to be poor.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a board card and a cover body structure thereof, and aims to solve the problems that the existing board card is complex in assembly process and poor in cover body fixing structure is easy to occur in the assembly process.

According to some embodiments of the present invention, there is provided a card cover structure, including a first cover and a second cover; the first cover body comprises two first side walls which are oppositely arranged and a first cover plate which is positioned between the two first side walls, and the first side walls are provided with clamping blocks; the second cover body comprises two second side walls which are oppositely arranged and a second cover plate which is positioned between the two second side walls, and the second cover body is provided with a clamping groove; the first cover body is buckled with the second cover body, and the clamping block is clamped and connected with the clamping groove; the fixture block is constructed to comprise a connecting portion and a limiting portion, two ends of the connecting portion are respectively connected with the limiting portion and the first side wall, and the limiting portion is used for limiting the first cover body to move relative to the second cover body along a direction perpendicular to the first side wall.

According to the board card cover body structure provided by the utility model, the combination of the first cover body and the second cover body can be completed by sliding the clamping block into the clamping groove to slide in place, and compared with screw connection, the combination is simpler, more convenient and quicker. The limiting part of the clamping block can be matched with the wall thickness near the clamping groove to realize the limiting in the front-back direction; connecting portion also can with the groove width of back end draw-in groove Z direction or the wall width cooperation between draw-in groove and the lateral wall top to realize spacing of direction from top to bottom, thereby avoid the integrated circuit board after the equipment, rock by a wide margin, firm inadequately about from top to bottom between first lid and the second lid.

In one implementation, the card slot is configured to include an entry section and a locking section that are connected; the locking section comprises an anterior section and a posterior section, the second side wall comprises a first portion corresponding to the anterior section and a second portion corresponding to the posterior section, the wall thickness of the first portion is smaller than that of the second portion, and the inner surfaces of the first portion and the second portion are transited by a guide slope. The wall thickness of the first part is small, so that the moving smoothness of the clamping block in the clamping groove in the assembling process is improved; the smooth and easy degree of fixture block gliding process from the front segment to the back segment can be improved to the direction inclined plane.

In one implementation, the length of the connecting part is 0.1-0.5 mm greater than the wall thickness of the rear section. The range of shaking back and forth between the cover bodies is limited, and the shaking is avoided being overlarge.

In one implementation, the length of the locking section is at least 3mm greater than the width of the connecting portion in the length direction of the card slot. Longer locking section can prevent that the fixture block from deviating from.

In one implementation manner, the clamping groove is located on the second side wall, the entry section is a first elongated opening perpendicular to the first cover plate, the locking section is a second elongated opening parallel to the first cover plate, and the second elongated opening is communicated with the first elongated opening; the fixture block is a T-shaped nail, the vertical section of the T-shaped nail is the connecting part, and the horizontal section of the T-shaped nail is the limiting part. The T-shaped nail can be made of hard alloy to reduce deformation possibility and prolong service life.

In one implementation, the first cover plate, the first side wall, the second cover plate and the second side wall together enclose a heat dissipation air duct; the inner surface of the second side wall is provided with an inner concave part, when the first cover body and the second cover body are in a locking state, the inner concave part is used for accommodating the limiting part, and the inner surface or the free end of the limiting part is flush with the inner surface of the second side wall, so that the heat dissipation air duct is not affected. The concave part can accommodate the limiting part, so that the wind resistance is reduced, and the heat dissipation effect is improved.

In one implementation manner, the clamping groove is located at the second side wall and the joint of the second side wall and the second cover plate, the entry section is a third elongated opening perpendicular to the first cover plate, the locking section is a fourth elongated opening parallel to the first cover plate, the fourth elongated opening is formed at the joint of the second cover plate and the second side wall, and the third elongated opening is communicated with the fourth elongated opening; the fixture block is an L-shaped plate, the horizontal section of the L-shaped plate is the connecting portion, the vertical section of the L-shaped plate is the limiting portion, and the connecting portion is connected with the free end of the first side wall. The L-shaped plate can be formed by directly bending the side wall, so that the processing technology is simplified, and the manufacturing cost is reduced.

In one implementation, the first cover plate, the first side wall, the second cover plate and the second side wall together enclose a heat dissipation air duct; when the first cover body and the second cover body are in a locking state, the free end of the limiting portion is flush with the inner surface of the second cover plate, and the heat dissipation air duct is not affected. The free end of the limiting part is flush with the inner surface of the second cover plate, so that wind resistance can be reduced, and the heat dissipation effect is improved.

In one implementation, the junction between the locking section and the entry section, and the entrance of the entry section are all configured as smooth transitions. The fillet can make the smooth and easy degree that improves the fixture block and remove at draw-in groove entry and corner.

In one implementation, the latch is disposed on an inner surface of the first sidewall. After the assembly, the clamping block is hidden in the heat dissipation air duct, so that the appearance of the board card cover body structure is not influenced.

The utility model also provides a board card, which comprises the board card cover body structure, a circuit board provided with the AI chip and a radiator; the second cover plate of the board card cover body structure is provided with a mounting opening, the circuit board is arranged on the outer surface of the second cover plate, the mounting opening is used for placing the AI chip, the radiator is arranged in the heat dissipation air duct, and the radiator is in contact with the AI chip. The board card is firmly assembled and has good heat dissipation effect.

Additional aspects of the card and cover configurations provided by the present invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and other objects, features and advantages of the embodiments of the present invention will become more readily understood by the following detailed description with reference to the accompanying drawings. Embodiments of the utility model will now be described, by way of example and not limitation, in the accompanying drawings, in which:

fig. 1 is a schematic perspective view of a board card according to a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the base of FIG. 1;

FIG. 3a is a top view of the detail of FIG. 2;

FIG. 3b is a cross-sectional view of a portion of FIG. 2;

FIG. 4 is a schematic structural view of the upper cover of FIG. 1;

FIG. 5 is a top view of the detail location of FIG. 4;

fig. 6 is a partial cross-sectional view of a board card cover structure according to a first embodiment of the present invention;

fig. 7 is a schematic structural diagram of a base according to a second embodiment of the present invention;

FIG. 8a is a bottom view of the detail of FIG. 7;

FIG. 8b is a cross-sectional view of the detail of FIG. 7;

fig. 9 is a schematic structural diagram of an upper cover according to a second embodiment of the present invention;

FIG. 10 is a cross-sectional view of the detail of FIG. 9;

fig. 11 is a partial cross-sectional view of a board card cover structure according to a second embodiment of the present invention.

Reference numerals:

1-covering the upper cover; 11-a top wall; 12-an upper side wall; 13-a cartridge; 131-a limiting part; 132-a connecting portion;

2-a base; 21-bottom wall; 22-lower side wall; 221-a first portion; 222-a second portion; 23-a card slot; 231-an entry section; 232-a locking section; 2321-anterior segment; 2322-posterior segment; 24-an inner recess; 25-a guide slope; 26-rounding off;

and 3, a radiator.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "radial," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "embodiment," "some embodiments," "an example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

With the rapid development of artificial intelligence chips, artificial intelligence boards based on a PCIE architecture are widely applied to data centers, servers and other scenes. A common board card includes an upper cover, a base, a heat sink, and a circuit board with an AI chip, and the upper cover and the base are generally fixed by a plurality of screws. The board card that adopts the screw connection, the assembling process is complicated, inefficiency, and after long-time the use, especially under the situation of dismouting upper cover and base repeatedly, the screw tooth is worn and torn easily, produces the unable locking of smooth tooth phenomenon, appears the lid fixed knot between upper cover and the base to construct bad problem easily. And when the screw is screwed from outside to inside, the screw head is exposed outside the board card, and the appearance of the board card can be influenced.

In order to make the assembly faster and more convenient, the inventor thinks that the fixing of the upper cover and the base can be realized by the connection of the clamping blocks. And in order to be able to assemble and disassemble quickly and ensure that the upper cover and the base can both ensure the good use of the fixing structure between the board card cover bodies after assembly and repeated disassembly and assembly, the specific structural design of the connection of the clamping blocks becomes abnormal. In addition, if when adopting the joint structure, with the cooperation size design of two lids just, do not have design allowance or design allowance very little promptly, can reduce and rock, but the required precision can be than higher, and the lateral wall of two lids just can have the jam to pause slightly nonparallel, and the assembling process is smooth and easy inadequately, comparatively takes time. However, if the clamping structure is adopted, the allowance of the matching dimension design of the two cover bodies is large, the two cover bodies can shake greatly, and the normal use of the board card is influenced. Therefore, the inventor designs the fixture block structure of multiple differences and discovers after trial and error to them, when adopting the two segmentation draw-in grooves of contained angle and having connecting portion and the fixture block of spacing portion, can realize fast assembly and the dismantlement between upper cover and the base, the existence of connecting portion and spacing portion moreover can realize with the local accurate size cooperation that whole of vertical and fore-and-aft direction is spacing respectively.

The board card provided by the utility model is described in detail below with reference to specific embodiments.

Example one

Fig. 1 is a schematic perspective view of the board card provided in this embodiment. As shown in fig. 1, the board card provided in this embodiment includes a board card cover structure, that is, an upper cover 1 and a base 2. The upper cover 1 comprises two upper side walls 12 arranged oppositely and a top wall 11 positioned between the two upper side walls 12, and the upper side walls 12 are provided with clamping blocks 13; the base 2 comprises two lower side walls 22 arranged oppositely and a bottom wall 21 located between the two lower side walls 22, and a clamping groove 23 clamped and connected with the clamping block 13 is arranged on the base 2. The upper cover 1 is connected with the base 2 in a buckling manner, and the top wall 11, the upper side wall 12, the bottom wall 21 and the lower side wall 22 jointly enclose a heat dissipation air duct.

In the present embodiment, the up-down direction refers to the Z-axis direction in fig. 1, the front-back direction refers to the X-axis direction in fig. 1, and the left-right direction refers to the Y-axis direction in fig. 1.

The board card further comprises a circuit board provided with an AI chip and a heat sink 3. The radiator 3 is arranged in the radiating air duct, and the circuit board is arranged on the outer surface of the bottom wall 21. A mounting opening is generally formed in the bottom wall 21 of the base 2 for receiving a protruding AI chip on the circuit board, and the AI chip is in contact with the heat sink 3, so that the AI chip on the circuit board is cooled by the heat sink 3 to ensure the normal operation of the chip. The base 2 can be made of high thermal conductive material such as aluminum alloy and copper alloy by die-casting, extrusion molding or CNC (Computer numerical control), so as to further improve the heat dissipation effect.

In some implementations, the upper cover 1 may be made of a metal plate, an aluminum plate, or the like by bending, or may be directly made by casting. In other implementations, the cover 1 can also be made by over-molding with plastic.

In some examples, the spacing between the outer surfaces of the two lower sidewalls 22 of the base 2 is less than the spacing between the inner surfaces of the two upper sidewalls 12 of the cover 1. At this time, the latch 13 may be disposed on the inner surface of the upper sidewall 12, and the latch 23 is disposed on the lower sidewall 22, so that after the assembly of the upper cover 1 and the base 2 is completed, the latch 13 can be hidden in the heat dissipation air channel, and the appearance of the outer surface of the board card is not affected. The inner surface herein is the surface facing the inside of the cover. In some examples, the upper sidewall 12 may be provided with a plurality of latches 13 at intervals along the length direction, and correspondingly, the lower sidewall 22 is provided with a plurality of slots 23 at intervals along the length direction. For example, the figures show that one latch 13 is respectively arranged at the left end and the right end of the upper side wall 12, that is, the upper cover 1 is provided with four latches 13; correspondingly, the base 2 is provided with four clamping grooves 23, the four clamping grooves 23 are respectively arranged at the left end and the right end of the lower side wall, and each clamping groove 23 corresponds to one clamping block 13. The fixture block 13 and the clamping groove 23 at the four corners are matched to improve the stability of the board card, and when one clamping structure is damaged, other clamping structures can also ensure that the upper cover 1 and the base 2 are fixed, so that the service life of the board card is prolonged.

FIG. 2 is a schematic structural diagram of the base of FIG. 1; FIG. 3a is a top view of the detail of FIG. 2; fig. 3b is a sectional view of a partial position in fig. 2. As shown in fig. 2, 3a and 3b, the entrance section 231 is a first elongated opening perpendicular to the bottom wall 21, and the locking section 232 is a second elongated opening parallel to the bottom wall 21, and the second elongated opening is communicated with the first elongated opening. Of course, in other examples, the entering section 231 and the locking section 232 may be non-perpendicular to each other, for example, the included angle therebetween may be between 90 ° and 180 °; the entry segment 231 may be oriented in a non-vertical direction, and similarly, the locking segment 232 may be oriented in a non-horizontal direction.

In a specific example, the entry segment 231 extends from the free end of the lower sidewall 22, i.e., the upper end of the lower sidewall 22, down to the middle portion of the lower sidewall 22. In other examples, the bottom end of the entry segment 231 may be located at any suitable height of the lower sidewall 22.

FIG. 4 is a schematic structural view of the upper cover of FIG. 1; fig. 5 is a top view of a portion of fig. 4. As shown in fig. 4 and 5, the latch 13 includes a connecting portion 132 and a limiting portion 131, wherein the connecting portion 132 is used for connecting the limiting portion 131 with the upper sidewall 12, and the limiting portion 131 is used for limiting the movement of the upper cover 1 relative to the base 2 along a direction perpendicular to the upper sidewall 12.

In the present embodiment, the latch 13 is designed as a round pin structure having a longitudinal section of an approximate T shape, as shown in fig. 5, in other words, the stopper 131 is a circular plate-shaped structure, the connecting portion 132 is a rod-shaped structure, and one end of the rod-shaped structure is fixedly connected with the center of the circular plate-shaped structure. Of course, in other examples, the limiting portion 131 may be designed to be a rectangular plate-shaped structure or other shapes, and the connecting portion 132 may also be designed to be a sheet-shaped structure.

In some implementations, the latch 13 may be fixed with the upper cover 1 by riveting or welding. In order to avoid deformation of the latch 13, it may be made of cemented carbide.

When the upper cover and the base are assembled, after the fixture block 13 slides from the vertically arranged entrance section 231 to the horizontally arranged locking section 232, the connecting part 132 is clamped in the locking section 232 to realize the limit in the up-down direction, and the limiting part 131 is matched with the upper side wall to clamp the lower side wall 22 to realize the limit in the front-back direction.

Optionally, the width of the entering section 231 of the slot 23 is at least 0.3mm larger than the diameter of the round pin connecting part 132 so as to be freely slidable.

Optionally, the connecting portion of the entering section 231 and the locking section 232 and the other end of the entering section 231 are both provided with a rounded corner 26, and the rounded corner 26 is used for guiding, so that the smoothness of the sliding of the fixture block 13 at the inlet and the corner of the fixture groove 23 can be improved. After the fixture block 13 slides in place in the locking section 232, the length of the locking section 232 is at least 3mm longer than the diameter of the round nail connecting part 132, so that the fixture block 13 is prevented from falling off. As shown in fig. 2 and 4, when the working environment of the board card is bumpy, a threaded connection device may be provided at one end of the upper cover 1 and the base 2 to prevent the latch 13 from coming off.

It should be noted that the locking section 232 includes a front section 2321 and a rear section 2322, the lower side wall 22 includes a first portion 221 corresponding to the front section 2321 and a second portion 222 corresponding to the rear section 2322, and a wall thickness of the first portion 221 is smaller than a wall thickness of the second portion 222, so as to ensure that the latch 13 slides smoothly on the front section 2321 and can be locked on the rear section 2322.

It should be noted that the inner surfaces of the first portion 221 and the second portion 222 can be connected by the guiding inclined surface 25, and the guiding inclined surface 25 can improve the smoothness of the movement of the latch 13 when the front segment 2321 moves toward the rear segment 2322. The connection between the guide inclined surface 25 and the wall surface of the front and rear sections 2322 can be transited through an arc surface, so that the smoothness of the fixture block 13 when the front section 2321 moves to the rear section 2322 is further improved.

In some examples, the groove width of the back segment 2322 in the Z-direction is 0-0.10 mm larger than the diameter of the round pin connection 132 to further control the amplitude of the up-and-down wobble. In addition, the diameter of the round pin limiting part 131 can be at least 0.8mm larger than the groove width of the rear section 2322 along the Z direction, and the length of the round pin connecting part 132 in the front-rear direction is 0.1-0.3 mm larger than the wall thickness of the first part 221, namely the wall thickness corresponding to the rear section 2322, so as to further control the amplitude of the front-rear shaking.

In this embodiment, the inner surface of the lower sidewall 22 may further be provided with an inner concave portion 24, that is, the wall thickness of the rear segment 2322 is smaller than the entire wall thickness of the lower sidewall 22, so as to accommodate the stopper 13 limiting portion 131. In practice, a rectangular concave portion 24 can be formed by selecting a suitable position on the lower sidewall 22 and thinning the inner wall surface, as shown in fig. 3 b. Then, the inner concave portion 24 is further processed and thinned, and finally three wall thicknesses are formed on the lower side wall 22, the lower side wall 22 subjected to secondary thinning processing is a first portion 221, the lower side wall 22 subjected to primary thinning processing is a second portion 222, the wall thickness of the lower side wall 22 not subjected to thinning processing is called an overall wall thickness, a rectangular portion recess smaller than the overall wall thickness is called an inner concave portion 24, and the lower side wall can be processed in a grinding or die casting mode.

Fig. 6 is a partial cross-sectional view of a board card cover structure according to an embodiment of the present invention. As shown in fig. 6, when the upper cover 1 and the base 2 are in the locked state, the free end of the limiting portion 131 is flush with the inner surface of the lower sidewall 22 to reduce wind resistance and ensure heat dissipation. In addition, the concave portion 24 may also be used to accommodate a part of the position-limiting portion 131 of the latch 13, and an inner surface of the position-limiting portion 131 is not flush with an inner surface of the lower sidewall 22, which may be adjusted according to the wall thickness of the lower sidewall 22 and the thickness of the position-limiting portion 131.

Example two

The difference between the present embodiment and the first embodiment is that the structures of the clamping block and the clamping groove are different, and the specific structures and the matching manner of the clamping block and the clamping groove in the present embodiment are specifically described below with reference to the drawings.

Fig. 7 is a schematic structural diagram of a base provided in this embodiment; FIG. 8a is a bottom view of the detail of FIG. 7; fig. 8b is a cross-sectional view of a detail of fig. 7. As shown in fig. 7, 8a and 8b, the entrance section 231 is a third elongated opening perpendicular to the bottom wall 21, and the locking section 232 is a fourth elongated opening parallel to the bottom wall 21, and the fourth elongated opening is communicated with the third elongated opening. Of course, in other examples, the entering section 231 and the locking section 232 may be non-perpendicular to each other, for example, the included angle therebetween may be between 90 ° and 180 °; the entry segment 231 may be oriented in a non-vertical direction, and similarly, the locking segment 232 may be oriented in a non-horizontal direction.

In a specific example, the entering section 231 extends downward from the free end of the lower sidewall 22, i.e., the upper end of the lower sidewall 22, to the junction of the lower sidewall 22 and the bottom wall 21, and the locking section 232 is disposed at the junction of the lower sidewall 22 and the bottom wall 21.

Fig. 9 is a schematic structural diagram of the upper cover provided in this embodiment; fig. 10 is a sectional view of a portion of fig. 9. As shown in fig. 9 and 10, the latch 13 is configured to include a connecting portion 132 and a stopper portion 131, the connecting portion 132 is used to connect the stopper portion 131 with the upper sidewall 12, and the stopper portion 131 is used to restrict the upper cover 1 from moving in a direction perpendicular to the upper sidewall 12 with respect to the base 2.

As shown in fig. 10, in the present embodiment, the latch 13 is designed in a flap structure having an approximately L-shaped longitudinal section; in other words, the connecting portion 132 and the limiting portion 131 of the latch 13 are rectangular brackets, and one end of the connecting portion 132 is connected with the end of the limiting portion 131; the other end of the connecting portion 132 is fixed to the free end of the upper side wall 12. Of course, in other examples, the position-limiting portion 131 may be designed as a plate-shaped structure with other shapes, such as a square plate, a semi-circular plate, etc., and the connecting portion 132 may also be designed as a column-shaped structure.

In some implementations, the latch 13 can be formed by directly bending the upper sidewall 12 to simplify the manufacturing process and reduce the manufacturing cost. In other implementations, the latch 13 may also be welded and fixed on the upper sidewall 12, and the latch 13 is made of hard alloy to prevent deformation.

When the upper cover and the base of the embodiment are assembled, after the fixture block 13 slides from the vertically arranged entering section 231 to the horizontally arranged locking section 232, the connecting part 132 is matched with the top wall 11 to clamp the lower side wall 22, so that the limit in the up-down direction can be realized; the limiting part 131 is clamped in the locking section 232 and is matched with the upper side wall to clamp the lower side wall 22, so that the front and back limiting can be realized. In the present embodiment, the up-down direction refers to the Z-axis direction in fig. 7, the front-back direction refers to the X-axis direction in fig. 7, and the left-right direction refers to the Y-axis direction in fig. 7.

Optionally, the width of the entering section 231 of the slot 23 is at least 0.3mm longer than the horizontal side of the rectangular support plate of the connecting part 132, so as to facilitate free sliding.

Optionally, the connecting portion of the entering section 231 and the locking section 232 and the other end of the entering section 231 are both provided with a rounded corner 26, and the rounded corner 26 is used for guiding, so that the smoothness of the sliding of the fixture block 13 at the inlet and the corner of the fixture groove 23 can be improved.

Optionally, the length of the locking section 232 is at least 3mm longer than the side length of the rectangular support plate of the connecting part 132 connected with the upper side wall 12, namely the side length in the Y direction, so as to prevent the fixture block 13 from falling out. As shown in fig. 7 and 9, when the working environment of the board card is bumpy, a threaded connection device may be provided at one end of the upper cover 1 and the base 2 to prevent the latch 13 from coming off.

It should be noted that the locking section 232 includes a front section 2321 and a rear section 2322, the lower side wall 22 includes a first portion 221 corresponding to the front section 2321 and a second portion 222 corresponding to the rear section 2322, and a wall thickness of the first portion 221 is smaller than a wall thickness of the second portion 222, so as to ensure that the latch 13 slides smoothly on the front section 2321 and can be locked on the rear section 2322.

It should be noted that the inner surfaces of the first portion 221 and the second portion 222 can be connected by the guiding inclined surface 25, and the guiding inclined surface 25 can improve the smoothness of the movement of the latch 13 when the front segment 2321 moves toward the rear segment 2322. The connection between the guide inclined surface 25 and the wall surface of the front and rear sections 2322 can be transited through an arc surface, so that the smoothness of the fixture block 13 when the front section 2321 moves to the rear section 2322 is further improved.

In this embodiment, the length of the connecting portion 132 in the front-back direction is 0.2-0.5 mm longer than the wall thickness of the second portion 222, i.e., the rear portion 2322, so that on one hand, the gap between the latch 13 and the inner and outer wall surfaces is at least greater than 0.1mm, and on the other hand, the gap between the latch 13 and the inner and outer wall surfaces is not too large to cause a wobbling phenomenon in the front-back direction.

Optionally, the distance between the upper wall surface of the connecting portion 132 and the lower wall surface of the top wall 11 is 0.2mm to 0.5mm longer than the length of the lower side wall 22 in the vertical direction, so as to further control the amplitude of the vertical shaking.

Fig. 11 is a partial cross-sectional view of a board card cover structure according to a second embodiment of the present invention. As shown in fig. 11, in the present embodiment, in the assembled board card cover structure, the free end of the limiting portion 131 is flush with the inner surface of the bottom wall 21, so that the wind resistance can be reduced, and the heat dissipation capability can be improved. In other examples, if the bottom wall 21 is thicker, the stopper 131 may be extended upward without exceeding the inner surface of the bottom wall 21. Of course, the upward extending length of the limiting portion 131 may also exceed the inner wall surface of the bottom wall 21, and at this time, the lower side wall 22 corresponding to the rear section 2322 may be provided with an inner concave portion 24 for accommodating part or all of the limiting portion 131 of the latch 13.

Finally, it should be noted that although the above embodiments describe the first cover as the upper cover 1, the first cover as the top wall 11, the first side wall as the upper side wall 12, the second cover as the base 2, the second cover as the bottom wall 21, the second side wall as the lower side wall 22; the matching manner and structure of the latch 13 and the latch groove 23 are described in detail by taking the example that the latch 13 is disposed on the upper cover 1 and the latch groove 23 is disposed on the base 2. However, it should be understood by those skilled in the art that in other embodiments, the first cover may be the base 2, and the second cover may be the upper cover 1, that is, the latch 13 may be disposed on the base 2, and the latch 23 may be disposed on the upper cover 1.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the details of the above embodiments, and various features described in the above embodiments may be combined in any suitable manner, or various different embodiments may be combined in any suitable manner or simply modified within the technical concept of the present invention, and the combination or the modification is within the protection scope of the present invention.

Claims (11)

1. A kind of card body structure of the cover, characterized by, including the first body of the cover and second body of the cover;

the first cover body comprises two first side walls which are oppositely arranged and a first cover plate which is positioned between the two first side walls, and the first side walls are provided with clamping blocks;

the second cover body comprises two second side walls which are oppositely arranged and a second cover plate which is positioned between the two second side walls, and the second cover body is provided with a clamping groove;

the first cover body is buckled with the second cover body, and the clamping block is clamped and connected with the clamping groove;

the fixture block is constructed to comprise a connecting portion and a limiting portion, two ends of the connecting portion are respectively connected with the limiting portion and the first side wall, and the limiting portion is used for limiting the first cover body to move relative to the second cover body along a direction perpendicular to the first side wall.

2. The card cover structure of claim 1, wherein the card slot is configured to include a connected entry section and a locking section; the locking section comprises an anterior section and a posterior section, the second side wall comprises a first portion corresponding to the anterior section and a second portion corresponding to the posterior section, the wall thickness of the first portion is smaller than that of the second portion, and the inner surfaces of the first portion and the second portion are transited by a guide slope.

3. The board cover structure of claim 2, wherein the length of the connecting portion is 0.1-0.5 mm greater than the wall thickness of the rear section.

4. The board cover structure of claim 2, wherein the length of the locking section is at least 3mm greater than the width of the connecting portion in the length direction of the card slot.

5. The board card cover structure of claim 2, wherein the slot is located on the second sidewall, the entry section is a first elongated opening perpendicular to the first cover plate, the locking section is a second elongated opening parallel to the first cover plate, and the second elongated opening is in communication with the first elongated opening;

the fixture block is a T-shaped nail, the vertical section of the T-shaped nail is the connecting part, and the horizontal section of the T-shaped nail is the limiting part.

6. The board cover structure according to claim 5, wherein the first cover plate, the first side wall, the second cover plate, and the second side wall together enclose a heat dissipation duct for the board; the inner surface of the second side wall is provided with an inner concave part, when the first cover body and the second cover body are in a locking state, the inner concave part is used for accommodating the limiting part, and the inner surface or the free end of the limiting part is flush with the inner surface of the second side wall, so that the heat dissipation air duct is not affected.

7. The board card cover structure of claim 2, wherein the slot is located at the second sidewall and at a connection between the second sidewall and the second cover plate, the entry section is a third elongated opening perpendicular to the first cover plate, the locking section is a fourth elongated opening parallel to the first cover plate, the fourth elongated opening is formed at a connection between the second cover plate and the second sidewall, and the third elongated opening is in communication with the fourth elongated opening;

the fixture block is an L-shaped plate, the horizontal section of the L-shaped plate is the connecting portion, the vertical section of the L-shaped plate is the limiting portion, and the connecting portion is connected with the free end of the first side wall.

8. The board cover structure according to claim 7, wherein the first cover plate, the first side wall, the second cover plate, and the second side wall together enclose a heat dissipation duct; when the first cover body and the second cover body are in a locking state, the free end of the limiting portion is flush with the inner surface of the second cover plate, and the heat dissipation air duct is not affected.

9. The board cover structure of claim 2, wherein the connection between the locking section and the entry section and the entrance of the entry section are rounded.

10. The card cover structure of any of claims 1-9, wherein the latch is disposed on an inner surface of the first sidewall.

11. A board card, characterized by comprising the board card cover structure of any one of claims 1 to 10, a circuit board provided with an AI chip, and a heat sink;

be provided with the installing port on the second apron of integrated circuit board lid structure, the circuit board sets up the surface of second apron, the installing port is used for placing the AI chip, the radiator sets up in the radiating air duct of integrated circuit board lid structure, the radiator with the AI chip contacts.

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