CN1302005A - Fixing device - Google Patents

Abstract

The fixing device used to fix the expansion card in expansion slot in computer main board includes upright and fixing part. The upright has screw bolt in one end of connection with the main board and rectangular ratchets distributed conitnuous lengthwise. The fixing part includes a sleeve around the upright and vertical pressing arm in one end of the sleeve, the sleeve has at least one inside meshing tooth corresponding to the ratchet in the upright. When the meshing tooth and the ratchet mesh each other, the sleeve can slide only in the direction towards the screw bolt; and when the two are separated, the sleeve and solid freely to regulate position.

Description

Holding unit

The relevant a kind of holding unit of the present invention relates in particular to a kind of inner expansion board of fixing computer that is used for, to prevent its loosening holding unit that breaks away from expansion slot.

For PC, limited because of computer main board area and component number, be the multifunction that realizes computer, increasing information processing work will be finished by expansion board, correspondingly, be provided with the expansion slot of multiple different size on the computer main board to connect all kinds of expansion boards.Do not get loose for expansion board can firmly be plugged in the expansion slot, corresponding holding unit is set usually to expansion board fixing location in addition on mainboard, the structure of existing holding unit can be consulted United States Patent (USP) the 4th, 507,707,4,869,680 and 5,822, cases such as No. 193.

Yet, though the holding device for expansion card that above-mentioned United States Patent (USP) case is disclosed can play the fixedly effect of expansion board to a certain extent, but the defective of its existence is also fairly obvious: the above-mentioned the 4th, 507, the holding structure that No. 707 case disclosed, it is by screw rod the fixed mount on the expansion board to be fixed in to make the expansion board location on the holder of expansion slot side, yet a fixed mount that expands is set on expansion board and at the expansion slot side space that corresponding holder all can take sizable area is set, therefore this structure has been difficult to be suitable in the today of being particular about thin littleization design.And the above-mentioned branching rod structure that is embedded with spring ball that the 4th, 869, No. 680 case disclosed, its boring processing and assembling are all comparatively complicated and difficult, and itself member and related accessory number are more, and make its manufacturing cost high.As for the 5th, 822, the fixing-holding rack that the horizontal beam that No. 193 case disclosed combines with vertical beam, its retain strength only relies on the end that horizontal beam is fixed in cabinet to provide, and the retain strength that on the direction of vertical mainboard, does not directly provide by mainboard, therefore its retention effect is unsatisfactory, still has the possibility of being vibrated and getting loose in transportation.

Except that the existing holding structure that above-mentioned patent case is disclosed, industry somebody once attempted to utilize a threaded rod to be vertically fixed on expansion slot side on the mainboard, but be enclosed within on the threaded rod and distaff rotation and upper and lower mobile holding piece clip is lived the coboundary of expansion board by one, thereby be fixed.Yet because of the holding unit of this helicitic texture is had relatively high expectations to the tolerance on fit between the internal and external screw thread, the processing and manufacturing difficulty of screw thread is big and expend man-hour, increase cost, and makes this structure finally fail to obtain the industry approval.

The object of the present invention is to provide a kind of holding unit that is used for the inner expansion board of fixing computer, it is simple in structure, be easy to make and with low cost, its simple and convenient assembly and to take the mainboard area few can provide good retention effect, and be suitable for using in the host computer internal wholesale.

The objective of the invention is to be achieved through the following technical solutions: holding unit includes pillar and is located at retaining piece on the pillar, it is characterized in that: pillar one end is provided with screw rod along the extension of pillar length direction, by this screw rod pillar is fixed in expansion slot side on the mainboard, and the pillar surface is provided with along the serrate ratchet of pillar length direction continuous distribution; Retaining piece comprises the sleeve that is placed on the pillar, and be vertical at sleeve one end and have the gripping arm of buckleing of catching groove, wherein be provided with at least one tool elasticity with respect to the ratchet of pillar on the sleeve inner barrel and the engaging tooth of barrel expansion relatively, the configuration of roller seating space is corresponding between its configuration and surperficial adjacent two ratchets of pillar.During the two engagement, sleeve can only be along pillar towards sliding near screw rod one extreme direction under thrust; When the two got loose, sleeve can be free to slide along pillar and adjust the position.

Compared with prior art, holding unit of the present invention simple in structure, be easy to processing and assembling and with low cost, it takies the mainboard area and the space is little and retention effect is more reliable.

The invention will be further described below in conjunction with accompanying drawing and preferred embodiment.

Fig. 1 is a stereographic map of the present invention.

Fig. 2 is the front view of the pillar of holding unit of the present invention.

Fig. 3 is along the cut-open view of A-A direction among Fig. 2.

Fig. 4 is the left side view of pillar shown in Figure 2.

Fig. 5 is the front view of the retaining piece of holding unit of the present invention.

Fig. 6 is the left side view of retaining piece shown in Figure 5.

Fig. 7 is the upward view of retaining piece shown in Figure 5.

Fig. 8 is along the cut-open view of B-B direction among Fig. 6.

Fig. 9 is along the cut-open view of C-C direction among Fig. 5.

Figure 10 is the cut-open view of holding unit local structure of the present invention.

Figure 11 is the floor map of holding unit application state of the present invention.

As shown in Figure 1, holding unit 1 of the present invention includes lengthwise round bar shape pillar 2 and is located at movable retaining piece 3 on this pillar.Wherein, pillar 2 one ends are made as bottom 21, the other end then is made as top 22 relatively, vertically be provided with a screw rod 211 on the terminal surface 210 of bottom 21, this screw rod 211 has suitable length to cooperate with mainboard 6 (Figure 11 shows) along pillar 2 length directions, then offers cross bath 221 (as shown in Figure 4) and for screwdriver inserts pillar 2 rotations are screwed in the mainboard 6 on the terminal surface 220 on top 22.Leaning on one section cylinder on top 22 slightly between bottom 21 and the top 22, be provided with along the right-angle triangle zigzag ratchet 23 of pillar 2 length direction continuous distribution around its periphery, please cooperate with reference to Fig. 2 and shown in Figure 3, these ratchets 23 are the basal surface 231 perpendicular to pillar 2 axis directions towards a side of pillar bottom 21, opposite side then is positioned at these basal surface 231 tops and 21 directions are obliquely installed into inclined-plane 232 towards the bottom, forms a roller seating space 233 between the basal surface 231 of two adjacent ratchets 23 and inclined-plane 232.

Please be simultaneously with reference to Fig. 1 and Fig. 5 to shown in Figure 9, retaining piece 3 comprises the sleeve 31 that is placed on the pillar 2, and be vertical at sleeve 31 1 ends buckle gripping arm 33.The suitable manhole 310 of external diameter that its middle sleeve 31 has a diameter and pillar 2 passes through for pillar 2, unsettledly on relative two side tube-walls of this sleeve 31 be provided with a pair of flat partially cuboid button 32,32 liang of middle side parts of this two button respectively are provided with a connection rib 321 and link to each other with barrel, and constitute the fulcrum that button 32 rotates.This two button 32 end in the same way each towards mutually away from the direction projection be provided with an application of force piece 322 that exceeds sleeve 31 outside wall surface, the relative other end then extends towards close mutually direction and is provided with a pair of engaging tooth 323 that protrudes in the described through hole 310 on this two button 32, and this engaging tooth 323 has the triangular configuration suitable with above-mentioned roller seating space 233.So, when imposing suitable pressure on application of force piece 322, button 32 will be that fulcrum rotates an angle with connection rib 321, and the engaging tooth 323 that makes its other end towards mutually away from direction move, and the through hole 310 of sleeve 31 is the state of expanding outwardly relatively.

In addition, on sleeve 31, approach an end of described engaging tooth 323 and buckle gripping arm 33, and the position of the relative other end and above-mentioned button 32 homonymies is provided with flange 34 around the barrel surface along being provided with one perpendicular to the extension of sleeve 31 axis directions.On the bottom side end of this flange 34, protrude and be provided with several triangular bumps 331 in button gripping arm 33, between these triangular bumps 331, be formed with first catching groove 332, second catching groove 333 and the 3rd catching groove 334 (as shown in Figure 7).

Please refer to Figure 10, when retaining piece 3 is assembled mutually with pillar 2, can apply suitable pressure to the application of force piece 322 of above-mentioned button 32 and make 323 relative through holes 310 expansions of its engaging tooth, so that pillar 2 can successfully penetrate in the through hole 310 of sleeve 31; Or directly exert pressure after pillar 2 being aimed at the through hole 310 of retaining pieces 3, the engaging tooth 323 that forces button 32 on the sleeve 31 slides along the inclined-plane 232 of the ratchet 23 of pillar 2 and expands outwardly, and pillar 2 is entered in the through hole 310 of sleeve 31.At this moment, the engaging tooths 323 in the sleeve 31 buckle in the roller seating space 233 of 23 of adjacent two ratchets on the pillar 2 and tight engagement.Should understand, because the basal surface 231 of ratchet 23 is the surface level perpendicular to pillar 2 axis, and the configuration of engaging tooth 323 is just suitable with the roller seating space 233 of ratchet 23, thereby under this state, retaining piece 3 is except can be around pillar 2 rotates, can only under certain thrust, bottom 21 directions towards pillar 2 slide, and can't 22 directions slide towards the top.If need to increase the height of this retaining piece 3 apart from mainboard 6, then can apply certain pressure by application of force piece 322 to button 32, the engaging tooth 323 of button 32 other ends is expanded outwardly relatively and break away from, slide towards pillar 2 tops 22 relatively thereby can promote retaining piece 3 with ratchet 23.

As shown in figure 11, holding unit 1 of the present invention in use, screw rod 211 rotations with pillar 2 bottoms 21 earlier are screwed in the threaded hole that expansion slot 5 sides are preset on the mainboard 6, again expansion board 4 is inserted in the expansion slot 5, adjust the height of retaining piece 3 then in a manner described, when its button gripping arm 33 just and expansion board 4 when contour, rotary buckle gripping arm 33 makes its catching groove 332,333 or 334 be buckled in the upper limb of expansion board 4, suitably retaining piece 3 is moved the distance of several ratchets towards pillar 2 bottoms 21 directions again, can finish the firm button of expansion board 4 is held the location.

As previously discussed, by means of the right-angle triangle configuration of ratchet 23 and engaging tooth 323 and basal surface 231 designs, can avoid retaining piece 3 to cause detaining fully holding built on the sand towards pillar 2 tops, 22 direction activities, expansion board 4 is loosening or the phenomenon of escape.

Claims (7)

1. holding unit, the expansion board that is used for fixing computer inside, comprise the pillar that can be fixed in expansion slot side on the mainboard and be located at movable retaining piece on the pillar, it is characterized in that: the pillar surface is provided with the serrate ratchet along its length direction continuous distribution, and retaining piece comprises the sleeve that is nested with on pillar, and be vertical at sleeve one end and have the gripping arm of buckleing of catching groove, wherein be provided with at least one tool elasticity with respect to the ratchet of pillar on the sleeve inner barrel and the engaging tooth that expands outwardly of barrel relatively, the configuration of roller seating space is corresponding between the configuration of this engaging tooth and adjacent two ratchets in pillar surface.

2. holding unit as claimed in claim 1, it is characterized in that: pillar is a lengthwise right cylinder, its bottom vertically is provided with along the pillar length direction extends and the rotatable screw rod that is screwed in the computer main board, and the top that is positioned at the relative other end then is provided with and can cooperates the cross bath that inserts for screwdriver.

3. holding unit as claimed in claim 1 or 2, it is characterized in that: the rectangular triangle of ratchet that the damaged surface of pillar is provided with, the side of these ratchets towards the pillar bottom is a basal surface perpendicular to the pillar axes direction, it is towards the inclined-plane that a side on pillar top then is provided with for the inclined bottom extreme direction, and formation one roller seating space between adjacent two ratchets.

4. holding unit as claimed in claim 3 is characterized in that: the sleeve of retaining piece has the suitable manhole of external diameter of a diameter and pillar.

5. holding unit as claimed in claim 4, it is characterized in that: unsettledly on relative two side tube-walls of described sleeve be provided with a pair of flat partially cuboid button, aforementioned engaging tooth promptly is arranged on the inboard of this button one end and protrudes in the through hole of sleeve, and the other end of button then projection is provided with an application of force piece that exceeds the sleeve outer wall face.

6. holding unit as claimed in claim 5 is characterized in that: two middle side parts of this button respectively are provided with a connection rib and link to each other with barrel, and constitute the fulcrum that button rotates.

7. holding unit as claimed in claim 1, it is characterized in that: the button gripping arm of retaining piece is arranged on an end that approaches described engaging tooth on the sleeve, protrusion is provided with several triangular bumps on its bottom side end, is formed with first catching groove, second catching groove and the 3rd catching groove between these triangular bumps.

Images