JP2001127469A - Coming-off preventing structure for expansion card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coming-off preventing structure for expansion card, which can prevent the occurrence of a fault due to imperfect fixation of an expansion card which is constituted to add in interface section, etc., for outside connection to electronics, such as information processor, etc., when the electronics are moved, transported, or installed, while the card is inserted into the electronics. SOLUTION: In a coming-off structure for expansion card, a fixing means which fixes an expansion card so that the card may not come off from a prescribed position of the electronics after the card is inserted into the electronics and fixed to the prescribed position is installed to the card or a mother board.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic apparatus such as an information processing apparatus, and more particularly to a printed circuit board called an expansion card (hereinafter referred to as an expansion card) which is configured to add an external connection interface or the like. Regarding the mounting structure described in (1), it is possible to prevent the occurrence of a failure due to incomplete fixing of the expansion card when the expansion card is mounted on an electronic device, moved or transported, or in an environment after installation. The present invention relates to the realization of a structure for preventing the expansion card from coming off.

[0002]

2. Description of the Related Art A conventional expansion card pull-out prevention structure shown in FIG. 10 is provided mainly on one side where an expansion card 51 is fitted to a connector 61 mounted on a motherboard 52 and only on one side adjacent to the side. The two sides of the main body and the fixture 60 for attaching the connector for external connection mainly constitute a fixing structure of the expansion card 51 alone, and the plurality of expansion cards 51 are collectively prevented by the stick-shaped fixing means 53 to prevent the expansion card 51 from coming off. Has been implemented. However, it is necessary to remove and attach the rod-shaped fixing means 53 at the time of expansion and maintenance of the expansion card 51. In addition, if the user forgets to attach the stick-shaped fixing means 53 necessary when the extension card 51 is added or maintenance is completed,
Incomplete fixation of the expansion card 51 occurs due to variations in finished dimensions and incomplete mounting after detachment of a cable or the like. For this reason, when the expansion card 51 is mounted on the electronic device and moved or transported, or when the expansion card 51 is suspended and mounted depending on the environmental condition of the electronic device, the expansion card 51 may be suspended by its own weight. Or expansion card 51 and connector 6
Unstable connection with 1 may occur.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the following problems in the above-mentioned conventional structure for preventing the expansion card from coming off. 1) Two sides, one side for fitting the connector mounted on the motherboard with the expansion card and the fixture provided only on one side adjacent to the side, constitute a fixed structure of the expansion card alone,
Further, a plurality of expansion cards are put together to prevent the expansion cards from being pulled out by fixing means. For this reason, it is necessary to remove and attach the bar-shaped fixing means at the time of expansion and maintenance of the expansion card. 2) However, the expansion card may be incompletely fixed due to forgetting to attach the fixing means required at the time of expansion or maintenance of the expansion card, variation in finished dimensions of the expansion card, or incomplete mounting. 3) Also, depending on whether the expansion card is mounted on the electronic device, moved or transported, or depending on the state of being mounted and installed on the electronic device, the expansion card may be pulled out by its own weight or external force, or the expansion card may be disconnected from the connector. Unstable connections may occur.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a housing which is positioned on a side fitted to a connector mounted on a motherboard, and which is formed on one side in the insertion direction of the side. In the structure for preventing the expansion card from being screwed and fixed, the expansion card or the motherboard is provided with fixing means for fixing the expansion card so that the expansion card does not come off from a state where the expansion card is mounted in a predetermined position. Features. By this means, even when the expansion card is mounted on the electronic device and moved or transported, it is possible to prevent the occurrence of a failure due to the incomplete fixation of the expansion card. An object of the present invention is to provide a structure for preventing the expansion card from coming off and capable of easily performing expansion and maintenance of the expansion card.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, as shown in FIG. 1, the expansion card pull-out prevention structure of the present invention is designed so that the expansion card 1 is not pulled out from a state where the expansion card 1 is mounted at a predetermined position. The fixing means 3 for fixing is provided on the expansion card 1 or the motherboard 2. With this means, since the expansion card or the motherboard is provided with the fixing means for fixing the expansion card, an effect is obtained that the expansion card can be prevented from falling out of a predetermined position.

Next, as shown in FIG. 2, in the structure for preventing the expansion card from coming off, the fixing means 3 is provided with a projection 1 formed at the tip of an L-shaped hook 4 fixed to the motherboard 2.
4 and the hole 11 of the expansion card 1.
By this means, since the fixing means is formed by locking the protrusion formed at the tip of the L-shaped hook fixed to the motherboard with the hole of the expansion card, each expansion card can be locked independently. An effect is obtained that the expansion and maintenance of the expansion card can be efficiently processed.

As shown in FIG. 3, in the expansion card pull-out prevention structure according to the present invention, the fixing means 3 is provided with protrusions 1 formed at both ends of a U-shaped hook 5 fixed to the motherboard 2.
4 and the hole 11 of the expansion card 1.
By this means, the fixing means is formed by locking the projections formed at both ends of the U-shaped hook fixed to the motherboard with the holes of the expansion card, so that each expansion card is independently engaged by a small component. An effect that can be stopped is obtained.

Further, as shown in FIG. 4, in the expansion card pull-out prevention structure of the present invention, the fixing means 3 comprises a front end of an extending C-shaped hook 6 fixed to the motherboard 2 and a hole 11 of the expansion card 1. Was determined to be locked. By this means, the fixing means is formed by the engagement between the tip of the extending C-shaped hook fixed to the motherboard and the hole of the expansion card, so that it is possible to handle expansion cards of various sizes independently. Get.

Next, as shown in FIG. 5, in the expansion card pull-out prevention structure of the present invention, the fixing means 3 is fixed to the mother board 2 by fixing one end forming a す る -shaped hook 7 to the notch 12 of the expansion card 1. With the lock. By this means, the fixing means is formed by the engagement between the one end forming the Γ-shaped hook fixed to the motherboard and the cutout of the expansion card, so that the expansion card is easily fixed,
There is provided an operation capable of providing a structure in which sudden separation is difficult to occur.

Further, as shown in FIG. 6, in the expansion card pull-out preventing structure of the present invention, the fixing means 3 is provided with a tongue 1 formed at the tip of a hook 8 with a guide fixed to the motherboard 2.
5 and the end face 13 of the expansion card 1. By this means, the fixing means is formed by locking the tongue formed at the tip of the guide hook fixed to the motherboard with the end face of the expansion card, so that the expansion card can be guided to a predetermined position and fitted to the motherboard. In this case, the card can be stably mounted and the expansion card can be easily fixed and detached.

Further, as shown in FIG. 7, in the expansion card pull-out prevention structure of the present invention, the fixing means 3 has one end forming a hook 9 with a low guide fixed to the motherboard 2 and a notch 12 of the expansion card 1. With the lock.
By this means, the fixing means is formed by the engagement between one end forming the hook with low guide fixed to the motherboard and the cutout of the expansion card, so that the expansion card and the motherboard can be fitted more stably. In addition, there is provided an effect that the expansion card can be easily fixed and detached.

Further, as shown in FIGS. 8 and 9, the structure for preventing the expansion card from falling off according to the present invention comprises a hook 1 for forming the fixing means 3 on a lever 10 fixed to the expansion card 1.
6 and the hole 11 or the notch 12 of the motherboard 2. By this means, since the fixing means is formed by the engagement between the hook formed on the lever fixed to the expansion card and the hole or notch of the motherboard, an effect that can be simplified can be obtained.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; FIG. In the following, the same portions are denoted by the same reference numerals, and detailed description may be omitted.

FIG. 1 is a principle view of the present invention. FIG. 1 (a) is a front view of a main part, FIG. 1 (b) is a side view of the main part, and FIG. . In FIG. 1, reference numeral 1 denotes an expansion card, which is an electronic device such as an information processing device, and is composed of a printed circuit board configured to add an external connection interface such as a SCSI connection circuit. Reference numeral 2 denotes a motherboard, which comprises a printed wiring board on which a plurality of expansion cards 1 are mounted and which can connect the expansion cards 1 to each other. 3 is a fixing means,
The expansion card 1 and the motherboard 2 are fixed so that the expansion card 1 does not come out of a predetermined position. Reference numeral 17 denotes a fixture, which fixes the expansion card 1 to the housing with screws. A connector 18 connects the expansion card 1 and the motherboard 2. The structure for preventing the expansion card from falling off according to the present invention is similar to the expansion card 1 with the fixture 17.
In addition to the screws fixed to the housing, for example, it is made of an insulator between the side to be fitted with the connector 18 and the opposite side, and can be expanded by applying an external force with a curved member. Spread the part with the spring property that recovers the form, so that it is locked by the bent parts formed at both ends of the member,
The fixing means 3 is formed on the expansion card 1 or the motherboard 2. That is, the fixing means 3 for fixing the expansion card 1 is provided on the expansion card 1 or the motherboard 2 so that the expansion card 1 does not come off from a state where the expansion card 1 is mounted at a predetermined position.

[0015] Thus, since the expansion card or the motherboard is provided with the fixing means for fixing the expansion card, it is possible to prevent the expansion card from falling out of a predetermined position, and to connect the expansion card to the motherboard. Of the expansion card can contribute to a stable operation of the expansion card.

FIGS. 2A and 2B are diagrams showing an embodiment of the present invention. FIG. 2A is a front view of a main part, and FIG. 2B is a side view of the main part. Is shown in cross section. In the figure, reference numeral 4 denotes an L-shaped hook, which is made of resin to fix the expansion card 1 and the motherboard 2;
A projection for press-fitting or snap-fixing the motherboard 2 is formed on the bottom, and a hole 1
The cross-section in which the projections 14 engaging with 1 are formed has an L-shape, and serves as a stopper. Reference numeral 11 denotes a hole, which is provided on the expansion card 1 so as to be a locking portion of the fixing means 3 for fixing the expansion card 1 and the motherboard 2. Reference numeral 14 denotes a projection which locks the expansion card 1 and the motherboard 2. The expansion prevention structure of the expansion card of the present invention is, for example, an expansion card 1
The L-shaped hook 4 was press-fitted or snap-fixed to the motherboard 2. That is, the protrusion 14 formed at the tip of the L-shaped hook 4 fixed to the motherboard 2 is engaged with the hole 11 of the expansion card 1.

With this configuration, the fixing means is formed by locking the projection formed at the tip of the L-shaped hook fixed to the motherboard with the hole of the expansion card. Thus, expansion and maintenance of expansion cards can be efficiently processed.

FIGS. 3A and 3B show another embodiment of the present invention. FIG. 3A is a front view of a main part, and FIG. 3B is a side view of the main part. The motherboard is shown in cross section. In the figure, reference numeral 5 denotes a U-shaped hook, which is made of resin for fixing the expansion card 1 and the motherboard 2 and has a projection formed on the bottom for press-fitting or snap-fixing the motherboard 2 inside the both ends of the upright portion. The cross section formed by opposing the projections 14 engaging with the holes 11 of the expansion card 1 is U-shaped, and serves as a stopper. In the structure for preventing the expansion card from coming off according to the present invention, for example, a hole 11 is provided in the expansion card 1 so as to be a locking portion of the fixing means 3, and the U-shaped hook 5 is press-fitted or snap-fixed to the motherboard 2. That is, the configuration is such that the projections 14 formed on both ends of the U-shaped hook 5 fixed to the motherboard 2 and the holes 11 of the expansion card 1 are locked.

With this, the fixing means is formed by locking the projections formed on both ends of the U-shaped hook fixed to the motherboard with the holes of the expansion card. Can be locked.

FIGS. 4A and 4B show another embodiment of the present invention. FIG. 4A is a front view of the main part, and FIG. 4B is a side view of the main part. The motherboard is shown in cross section. In the figure, reference numeral 6 denotes a C-shaped hook, which is made of a resin for fixing the expansion card 1 and the motherboard 2, and a part of the ring is cut off so that a fixed interval can be extended by opening the ring. One end penetrates and locks the hole of the motherboard 2, and the other end forms a C-shape that penetrates and locks the hole 11 of the expansion card 1 and serves as a stopper. In the structure for preventing the expansion card from coming off according to the present invention, for example, a hole 11 is provided in the expansion card 1 so as to serve as a locking portion of the fixing means 3, and a C-shaped hook 6 is locked in the motherboard 2 through the hole. That is, the distal end of the C-shaped hook 6 fixed to the motherboard 2 and the hole 11 of the expansion card 1 are locked.

As a result, the fixing means is formed by the engagement between the tip of the extending C-shaped hook fixed to the motherboard and the hole of the expansion card, so that expansion cards of various sizes can be handled independently. , Can promote the common use of members.

FIGS. 5A and 5B show another embodiment of the present invention. FIG. 5A is a front view of the main part, and FIG. 5B is a side view of the main part. Indicated by In the figure, reference numeral 7 denotes a Γ-shaped hook, which is made of resin for fixing the expansion card 1 and the motherboard 2, has a projection formed at the bottom for press-fitting or snap-fixing the motherboard 2, and has an expansion card The cross-section in which the portion that engages with the first notch 12 is formed in a Γ shape, and serves as a stopper. Reference numeral 12 denotes a notch, which is provided on the expansion card 1 so as to be a locking portion of the fixing means 3 for fixing the expansion card 1 and the motherboard 2. Reference numeral 15 denotes a tongue, which is formed at the tip of the フ ッ ク -shaped hook 7 and engages with the notch or end face 13 of the expansion card 1. In the structure for preventing the expansion card from coming off according to the present invention, for example, a notch 12 is provided in the expansion card 1 so as to be a locking portion of the fixing means 3, and a Γ-shaped hook 7 having a tongue 15 is pressed into the motherboard 2 or pressed. Snap fixed. That is, the Γ-shaped hook 7 fixed to the motherboard 2
And the notch 12 of the expansion card 1 is locked.

With this, the fixing means is formed by independent locking of one end forming the Γ-shaped hook fixed to the motherboard and the cutout of the expansion card, so that the fixing is easy and the detachment occurs unexpectedly. It is possible to make the structure difficult to perform, and to contribute to more stable operation of the expansion card.

FIGS. 6A and 6B show another embodiment of the present invention. FIG. 6A is a front view of a main part, and FIG. 6B is a side view of the main part. Indicated by In the figure, reference numeral 8 denotes a hook with a guide, which is made of a resin for fixing the expansion card 1 and the motherboard 2, has a projection formed at the bottom for press-fitting or snap-fixing the motherboard 2, and an expansion card is provided at the end of the upright portion. A tongue 15 is formed to be engaged with the end face 13 of the first expansion card 1. Further, a groove is provided in the upright portion so that the entire expansion card 1 can be slid and guided, thereby serving as a stopper. Reference numeral 13 denotes an end face, which is a side of the four sides of the expansion card 1 which faces the side to be fitted with the connector of the motherboard 2 and is engaged with the hook 8 with a guide. In the structure for preventing the expansion card from coming off according to the present invention, for example, the expansion card 1 is provided with an end surface 13 so as to serve as a locking portion of the fixing means 3, and the motherboard 2 is press-fitted or snap-fitted with a guide hook 8 having a tongue 15. Fixed. That is, the tongue 15 formed at the tip of the guide hook 8 fixed to the motherboard 2 and the expansion card 1
And the end face 13 is locked.

With this configuration, the fixing means is formed by independent locking between the tongue formed at the tip of the guide hook fixed to the motherboard and the end face of the expansion card. It can be stably mounted, can be easily fixed and detached, and can cope with an extended expansion card.

FIGS. 7A and 7B show another embodiment of the present invention. FIG. 7A is a front view of a main part, and FIG. 7B is a side view of the main part. Indicated by In the same figure, reference numeral 9 denotes a hook with a low guide, which is made of resin for fixing the expansion card 1 and the motherboard 2, and has a projection formed at the bottom for press-fitting or snap-fixing the motherboard 2, and extending at the tip of the upright portion. Notch 1 on card 1
A tongue 15 for engaging with the expansion card 2 is formed, and a groove for guiding a part of the expansion card 1 on the motherboard 2 side by sliding the expansion card 1 is provided on the upright portion, thereby serving as a stopper. In the structure for preventing the expansion card from coming off according to the present invention, for example, a notch 12 is provided in the expansion card 1 so as to be a locking portion of the fixing means 3, and a hook 9 with a low guide having a tongue 15 is press-fitted into the motherboard 2. Or snap fixed. That is, the configuration is such that one end forming the low guide hook 9 fixed to the motherboard 2 and the notch 12 of the expansion card 1 are locked.

[0027] With this, the fixing means is formed by independently locking the one end forming the hook of the guide fixed to the motherboard and the cutout of the expansion card, so that the expansion card and the motherboard can be further fitted. A structure that can be stably mounted and that can be easily fixed and detached so as to be compatible with expansion cards of various sizes can be provided.

FIGS. 8A and 8B show another embodiment of the present invention. FIG. 8A is a front view of a main part, and FIG. 8B is a side view of the main part. Indicated by In the figure, reference numeral 10 denotes a lever, which is made of resin for fixing the expansion card 1 and the motherboard 2, and fixes a shaft portion 19 to the expansion card 1 so as to be rotatable at a corner of the expansion card 1. And a hook portion 16 for forming a locking portion with the hole 11 or the notch 12 in both directions of the rotation direction. Further, a rotation operation portion 20 that is bent at a right angle to the hook portion 16 is provided. Reference numeral 19 denotes a shaft, and the lever 1
0 is made rotatable. Reference numeral 20 denotes a rotation operation part, which rotates the lever 10. The structure for preventing the expansion card from falling off according to the present invention is such that the lever 10 having a hook 16 formed at the corner of the expansion card 1 and engaged with the hole 11 or the notch 12 of the motherboard 2 can be rotated. 1 and the expansion card 1 on the motherboard 2.
Holes 11 or notches 12 are provided depending on the positional relationship between the substrate and the motherboard. That is, the configuration is such that the hook portion 16 formed on the lever 10 fixed to the expansion card 1 is engaged with the hole 11 or the notch 12 of the motherboard 2.

Thus, the fixing means is formed by independent locking between the hook formed on the lever fixed to the expansion card and the hole or notch of the motherboard, so that a simple and inexpensive structure can be achieved. .

FIG. 9 is a view showing another embodiment of the present invention, in which the details of the hook portion 16 shown in FIG. 8 are shown. FIG. 4B shows a main part of a form of engagement between the lever 10 and the notch 12 of the motherboard 2. The structure for preventing the expansion card from falling off according to the present invention is such that the rotatable lever 10 having a locking portion at the corner of the expansion card 1 can be rotated so as to cope with both of them according to the positional relationship between the expansion card 1 and the motherboard 2. Hook portions 16 were formed in both directions.

Thus, the fixing means can be adapted to both the expansion card and the motherboard so as to be able to cope with the positional relationship between the expansion card and the motherboard. Because it was made by independent locking with the notch,
A versatile and inexpensive structure can be obtained.

[0032]

According to the present invention described above, the following effects can be expected.

First, a fixing means for fixing the expansion card is provided on the expansion card or the motherboard so that the expansion card does not come off from a state where the expansion card is mounted in a predetermined position. With this, since the expansion card or the motherboard is provided with a fixing means for fixing the expansion card, it is possible to prevent the expansion card from being detached from a state where the expansion card is mounted in a predetermined position, and to connect the expansion card to the motherboard. The fitting can be stably mounted, and can contribute to the stable operation of the expansion card.

Next, the fixing means is formed by engaging a projection formed at the tip of the L-shaped hook fixed to the motherboard with a hole of the expansion card. With this, the fixing means is formed by the engagement between the protrusion formed at the tip of the L-shaped hook fixed to the motherboard and the hole of the expansion card. Locking can be performed, and expansion and maintenance of expansion cards can be efficiently processed.

Further, the fixing means is formed by engaging a projection formed at the tip of a U-shaped hook fixed to the motherboard with a hole of the expansion card. With this, the fixing means is formed by locking the projection formed at the tip of the U-shaped hook fixed to the motherboard with the hole of the expansion card. , And can be locked independently, and the bulk of material cost can be suppressed.

[0036] Further, the fixing means is formed by engaging a tip of an extending C-shaped hook fixed to the motherboard with a hole of the expansion card. With this, the fixing means
The extension of the C-shaped hook fixed to the motherboard is locked by the hole of the expansion card. In addition to the above-mentioned effects, expansion cards of various sizes can be handled independently. Can be promoted.

Next, the fixing means is formed by engaging one end forming a フ ッ ク -shaped hook fixed to the motherboard with a notch of the expansion card. With this, the fixing means is formed by independent locking between one end forming the Γ-shaped hook fixed to the motherboard and the cutout of the expansion card. In addition to the above-mentioned effects, the fixing is easy and the detachment is unexpected. This can make the structure difficult to occur, and can contribute to more stable operation of the expansion card.

Further, the fixing means is formed by engaging a tongue formed at the tip of a hook with a guide fixed to the motherboard with an end face of the expansion card. With this, the fixing means is formed by independent locking between the tongue formed at the tip of the hook of the guide fixed to the motherboard and the end face of the expansion card. A stable fitting can be achieved, and a structure that can be easily fixed and detached can be realized, and it is possible to cope with an expansion card having a large weight.

Further, the fixing means is formed by engaging one end forming a hook with a low guide fixed to the motherboard with a notch of the expansion card. With this, the fixing means is formed by independent locking between one end forming the hook of the guide fixed to the motherboard and the notch of the expansion card. It is possible to provide a structure which can be stably mounted and has a versatile structure which can be easily fixed and detached, which can accommodate expansion cards of various sizes.

Further, the fixing means is formed by engaging a hook formed on a lever fixed to the expansion card with a hole or notch of the motherboard. With this,
Since the fixing means is formed by engaging a hook formed on a lever fixed to the expansion card with a hole or notch in the motherboard, in addition to the above-described effects, a simple structure and an inexpensive member can be obtained.

[Brief description of the drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 is an embodiment diagram of the present invention.

FIG. 3 is another embodiment of the present invention.

FIG. 4 is another embodiment of the present invention.

FIG. 5 is another embodiment of the present invention.

FIG. 6 is a view showing another embodiment of the present invention.

FIG. 7 is another embodiment of the present invention.

FIG. 8 is another embodiment of the present invention.

FIG. 9 is a view showing another embodiment of the present invention.

FIG. 10 is an example of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Expansion card 2 Motherboard 3 Fixing means 4 L-shaped hook 5 U-shaped hook 6 C-shaped hook 7 フ ッ ク -shaped hook 8 Guided hook 9 Low-guided hook 10 Lever 11 Hole 12 Notch 13 End face 14 Projection 15 Tongue 16 Hook Department

Claims (8)

[Claims] A structure for preventing an expansion card from coming off, wherein the expansion card is positioned at a side to be fitted with a connector mounted on a motherboard and fixed to the housing by screws with a fixing tool formed on one side in the insertion direction of the side. The expansion card (1) or the motherboard (2) is provided with fixing means (3) for fixing the expansion card (1) so that the expansion card (1) does not come off from a state where the expansion card (1) is mounted in a predetermined position. A structure for preventing the expansion card from falling off. 2. The fixing means (3) includes a projection (14) formed at the tip of an L-shaped hook (4) fixed to the motherboard (2) and a hole (11) of the expansion card (1). 2. The structure for preventing the expansion card from falling off according to claim 1, wherein the expansion card is locked. 3. The fixing means (3) includes a projection (14) formed at both ends of a U-shaped hook (5) fixed to the motherboard (2) and a hole (11) of the expansion card (1). 2. The structure for preventing the expansion card from falling off according to claim 1, wherein the expansion card is locked. 4. The fixing means (3) is formed by engaging a tip of an extending C-shaped hook (6) fixed to the motherboard (2) with a hole (11) of the expansion card (1). The expansion card removal prevention structure according to claim 1, characterized in that: 5. The fixing means (3) is formed by engaging one end of a フ ッ ク -shaped hook (7) fixed to the motherboard (2) with a notch (12) of the expansion card (1). The expansion card removal prevention structure according to claim 1, characterized in that: 6. The fixing means (3) is a link between a tongue (15) formed at the tip of a hook with guide (8) fixed to the motherboard (2) and an end surface (13) of the expansion card (1). The structure for preventing the expansion card from coming off according to claim 1, wherein the expansion card is stopped. 7. The fixing means (3) includes a hook (9) with a low guide fixed to a motherboard (2).
Notch (12) of one end forming expansion card and expansion card (1)
The structure for preventing the expansion card from coming off according to claim 1, wherein the expansion card is locked. 8. The fixing means (3) includes a hook (16) formed on a lever (10) fixed to the expansion card (1) and a hole (11) or a notch (12) of a motherboard (2). The structure for preventing the expansion card from falling off according to claim 1, characterized in that the expansion card is locked.